阅读说明：本技术 一种可擦拭超纤合成革的生产方法 (Production method of erasable microfiber synthetic leather ) 是由 张勇 于 2021-09-22 设计创作，主要内容包括：本发明公开了一种可擦拭超纤合成革的生产方法,属于合成革技术领域,采用干法工艺制备半品,之后通过三版处理机对半品进行表面处理,且所述三版处理机的第一版处理轮上涂覆有水性油皮处理剂,所述三版处理机的第二版和第三版处理轮上均涂覆有水性擦试处理剂,最后经烘干后即得可擦拭超纤合成革。本发明的有益效果是：本发明制成的超纤合成革手感舒适,易刮易擦拭,擦拭后表面风格形成部分渗透至纹理后有自然风格,真皮感强,此外,还能够实现对皮革饰品的外观进行更丰富的设计以及改善现在市场上对传统人造皮革的使用方法,可以更加适应人类对美好生活的向往。(The invention discloses a production method of a cleanable microfiber synthetic leather, which belongs to the technical field of synthetic leather, wherein a dry process is adopted to prepare a semi-finished product, then a three-plate processor is used for carrying out surface treatment on the semi-finished product, a first plate treatment wheel of the three-plate processor is coated with a water-based oil skin treatment agent, a second plate treatment wheel and a third plate treatment wheel of the three-plate processor are both coated with a water-based wiping treatment agent, and finally the cleanable microfiber synthetic leather is obtained after drying. The invention has the beneficial effects that: the microfiber synthetic leather manufactured by the invention has comfortable hand feeling, is easy to scrape and wipe, has natural style after the surface style forming part permeates to the texture after wiping, has strong real leather feeling, can realize richer design on the appearance of a leather ornament, improves the use method of the traditional artificial leather in the market at present, and can be more suitable for the direction of people to good life.)

1. A production method of a cleanable microfiber synthetic leather is characterized by comprising the following steps:

the method comprises the following steps: preparing a fabric;

step two: coating the fabric in a scraping way, wherein the fabric is coated on the surface of release paper in a scraping way;

step three: preparing a medium material;

step four: c, coating a medium material in a blade mode, wherein the medium material is coated on the release paper in the step two in a blade mode;

step five: preparing a bottom material;

step six: scraping and coating a backing material, namely scraping and coating the backing material on the release paper in the fourth step, attaching the microfiber semi-finished product after drying to be semi-dry, and then drying at an increasing temperature to obtain the semi-finished product;

step seven: preparing a treating agent, and preparing a water-based oil skin treating agent and a water-based wiping treating agent;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather;

the first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

2. The production method of the erasable microfiber synthetic leather according to claim 1, wherein the aqueous wiping treatment agent comprises the following components in parts by mass:

10-14 parts of polyether polyol, 2-6 parts of isocyanate, 1-3 parts of hydrophilic chain extender, 0.5-1.5 parts of diamine chain extender, 1-3 parts of silicon dioxide, 0.5-1.5 parts of organic silicon and 76-80 parts of water.

3. The production method of the erasable microfiber synthetic leather according to claim 1, wherein the aqueous oil skin treatment agent comprises the following components in parts by mass:

14-18 parts of polyether polyol, 6-10 parts of isocyanate, 2-4 parts of hydrophilic chain extender, 0.5-1.5 parts of diamine chain extender, 1-3 parts of organosilicon and 68-72 parts of water.

4. The method for producing a synthetic leather by using super-fine fibers capable of being wiped as claimed in claim 1, wherein the temperature of the three-plate processor is set to 140-150 ℃, the speed of the machine is 6-8 m/min, and the coating amount of the first-plate processor is 18-22g/m for 100 meshes²The second plate treatment wheel has 60-mesh coating with the coating weight of 28-32g/m²The coating amount of the third edition of treatment wheel is 22-24g/m for 80 meshes²。

5. The method for producing a synthetic leather capable of wiping microfiber as claimed in claim 1, wherein in step six, the coating amount of primer is controlled at 190g/m and 170-²Drying to be semi-dry under the conditions that the temperature is 120 ℃ and the air supply rotating speed is 150rpm, attaching the microfiber semi-finished product, and drying at the temperature increased by 120-145 ℃.

6. The production method of the erasable microfiber synthetic leather according to claim 1, wherein in the fifth step, the primer is a one-liquid hydrolysis-resistant primer, the primer has a solid content of 45% and a modulus of 10-25Kg/cm2, and the primer comprises the following components in parts by mass:

100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 3 parts of bridging agent and 8-10 parts of color paste.

7. The method for producing a synthetic leather from super fiber capable of being wiped as claimed in claim 1, wherein in the fourth step, the coating amount of the medium material is controlled to be 130-150g/m²The drying temperature is controlled at 90-110 ℃, and the drying time is 3-4 minutes.

8. The production method of the erasable microfiber synthetic leather according to claim 1, wherein in the third step, the medium material comprises the following components in parts by mass:

100 parts of hydrolysis-resistant resin, 40 parts of dimethylformamide, 20 parts of butanone and 8-10 parts of color paste.

9. The method for producing a synthetic leather with super fiber capable of being wiped as claimed in claim 1, wherein in the second step, the coating weight of the facing material is controlled to be 100-120g/m²The drying temperature is controlled at 80-100 ℃, and the drying time is 3-4 minutes.

10. The production method of the erasable microfiber synthetic leather according to claim 1, wherein in the first step, the fabric comprises the following components in parts by mass:

100 parts of hydrolysis-resistant resin, 40 parts of dimethylformamide, 40 parts of butanone, 8-10 parts of color paste and 1-3 parts of water splashing agent.

Technical Field

The invention relates to the technical field of synthetic leather, in particular to a production method of erasable microfiber synthetic leather.

Background

In recent years, with the continuous updating of synthetic leather surface materials, people have higher and higher requirements on the appearance of leather ornaments, the touch comfort and the use durability, and with the brand new application of new materials and new post-treatment processes, the grade and the variety of artificial synthetic leather products are rapidly developed. Due to the continuous development of scientific technology, indexes such as strength, wear resistance, hygroscopicity and real leather feeling of artificial synthetic leather products are greatly improved compared with the prior art, and the continuous improvement of performance enables people to gradually accept the substitute material of the natural leather and form a huge application market. However, the traditional synthetic leather has the defects of single appearance and monotonous style due to the fact that the surface of the traditional synthetic leather is not easy to wipe and scrape, and most requirements of people on the appearance of the leather ornament cannot be met.

Disclosure of Invention

The problem that most of requirements of people on the appearance of leather ornaments cannot be met due to the defects that the surface of the traditional synthetic leather in the prior art is not easy to wipe and scrape, the appearance is single and the style is monotonous is solved. The invention discloses a production method of a cleanable microfiber synthetic leather, which comprises the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 8-10 parts by mass of color paste and 1-3 parts by mass of a water splashing agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing the release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 100-120g/m²The drying temperature is controlled to be 80-100 ℃, and the drying time is 3-4 minutes;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 8-10 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating the medium material in a blade mode, namely coating a layer of medium material on the release paper coated with the plus material in the step two through a second coating head, wherein the coating amount is controlled to be 130-²The drying temperature is controlled to be 90-110 ℃, and the drying time is 3-4 minutes;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 1-3 parts of bridging agent and 8-10 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step by a third coating head, wherein the coating amount is controlled at 190g/m²Drying at 120 deg.C and air supply speed of 150rpm to half-dry, attaching the microfiber semi-finished product, and packagingDrying at 120-145 deg.C to obtain semi-finished product;

step seven: preparing a treating agent, namely preparing 14-18 parts of polyether polyol, 6-10 parts of isocyanate, 2-4 parts of hydrophilic chain extender, 0.5-1.5 parts of diamine chain extender, 1-3 parts of organic silicon and 68-72 parts of water into an aqueous oil skin treating agent by mass, and preparing 10-14 parts of polyether polyol, 2-6 parts of isocyanate, 1-3 parts of hydrophilic chain extender, 0.5-1.5 parts of diamine chain extender, 1-3 parts of silicon dioxide, 0.5-1.5 parts of organic silicon and 76-80 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the coating amount of the first-version processing wheel is 18-22g/m for 100 meshes²The second plate treatment wheel has 60-mesh coating with the coating weight of 28-32g/m²The coating amount of the third edition of treatment wheel is 22-24g/m for 80 meshes²The first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

Preferably, the microfiber semi-finished product is finely ground by 240-mesh fine sand paper before use, and the microfiber has a specification of 1.15-1.35mm and is high in hydrolysis resistance. The material has the characteristics of 110N/3cm of peeling before hydrolysis resistance, 80N/3cm of peeling strength after 24 hours of hydrolysis resistance (soaking by 10 percent NaOH), soft and soft hand feeling, 2.8-3.6/0.1mm of softness, high trouser tearing strength, tensile strength of more than or equal to 400 in warp direction, more than or equal to 400 in weft direction and 20kgf/cm2 in bursting, and can make the surface of a product smooth and uniform after fine grinding.

The water-based oil skin treating agent prepared by the formula has the characteristics of good modeling, firm bonding, cold resistance, hydrolysis resistance, corrosion resistance, aging resistance, excellent transparent feeling and smooth hand feeling; the water-based wiping treatment agent has the characteristics of good film forming property and low adhesive force.

In the post-treatment process, the water-based oil skin treatment agent is used for pretreating the surface of the semi-finished product, and then the water-based wiping treatment agent is coated, so that the water-based oil skin treatment agent can protect the semi-finished product from being corroded by the water-based wiping treatment agent, and the problems of unsatisfactory product wiping effect, influence on appearance and the like caused by corrosion of the semi-finished product by the water-based wiping treatment agent are effectively solved.

It is specifically stated that, since the erasable performance has no national special standard, the patent herein defines the erasable performance of the erasable microfiber synthetic leather: the wet rubbing of a color fastness rubbing instrument is used as a detection method, and the range standard that the color effect of the leather surface basically falls off when wet rubbing is carried out for 30-60 times is used. In addition, it is particularly noted that the swabable microfiber synthetic leather of the present invention is not equal to swabable leather, but the name of the synthetic leather is similar to that of swabable leather.

The technical scheme of the invention has the following beneficial effects:

1. the invention discloses a production method of a cleanable microfiber synthetic leather, which comprises a manufacturing step of a semi-finished product, a post-treatment process of the semi-finished product, and a formula composition and a treatment mode of a water-based oil leather treatment agent and a water-based wiping treatment agent.

2. Through a large amount of researches, the characteristics of good film forming property and low adhesive force of the water-based wiping treatment agent are fully utilized by the inventor, so that the synthetic leather is influenced by environmental factors in the using process to form a natural weathering effect, and the surface of the synthetic leather has a natural antique style.

3. The synthetic leather can be designed according to the requirements of consumers, so that the defect that the traditional synthetic leather is monotonous in style is overcome; in addition, the product made of the synthetic leather can be wiped according to the preference of consumers to form different appearance effects, the appearance of the product can be designed automatically, the secondary design of the finished product by the consumers is realized, the self innovation pursuit of the consumers is met, and the consumers have better use feeling and experience feeling.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail and completely with reference to the examples of the present invention, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, provided in the examples, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The embodiment discloses a production method of a cleanable microfiber synthetic leather, which comprises the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 8-10 parts by mass of color paste and 1-3 parts by mass of a water splashing agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing the release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 100-120g/m²The drying temperature is controlled to be 80-100 ℃, and the drying time is 3-4 minutes;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 8-10 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating the medium material in a blade mode, namely coating a layer of medium material on the release paper coated with the plus material in the step two through a second coating head, wherein the coating amount is controlled to be 130-²The drying temperature is controlled to be 90-110 ℃, and the drying time is 3-4 minutes;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 1-3 parts of bridging agent and 8-10 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step by a third coating head, wherein the coating amount is controlled at 190g/m²Drying to be semi-dry under the conditions that the temperature is 120 ℃ and the air supply rotating speed is 150rpm, attaching the microfiber semi-finished product, and drying at the temperature increased by 120-145 ℃ to obtain a semi-finished product;

step seven: preparing a treating agent, namely preparing 14-18 parts of polyether polyol, 6-10 parts of isocyanate, 2-4 parts of hydrophilic chain extender, 0.5-1.5 parts of diamine chain extender, 1-3 parts of organic silicon and 68-72 parts of water into an aqueous oil skin treating agent by mass, and preparing 10-14 parts of polyether polyol, 2-6 parts of isocyanate, 1-3 parts of hydrophilic chain extender, 0.5-1.5 parts of diamine chain extender, 1-3 parts of silicon dioxide, 0.5-1.5 parts of organic silicon and 76-80 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the coating amount of the first-version processing wheel is 18-22g/m for 100 meshes²The second plate treatment wheel has 60-mesh coating with the coating weight of 28-32g/m²The coating amount of the third edition of treatment wheel is 22-24g/m for 80 meshes²The first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

And the microfiber semi-finished product in the step six needs to be finely ground by 240-mesh fine sand paper before use, and the microfiber specification is 1.15-1.35mm high hydrolysis resistance microfiber. The material has the characteristics of 110N/3cm of peeling before hydrolysis resistance, 80N/3cm of peeling strength after 24 hours of hydrolysis resistance (soaking by 10 percent NaOH), soft and soft hand feeling, 2.8-3.6/0.1mm of softness, high trouser tearing strength, tensile strength of more than or equal to 400 in warp direction, more than or equal to 400 in weft direction and 20kgf/cm2 in bursting, and can make the surface of a product smooth and uniform after fine grinding.

In the first step, the solid content of the hydrolysis-resistant resin is 30 percent, and the 100 percent modulus is 40-50Kg/cm2 of polyurethane resin. The polyurethane resin has the characteristics of excellent processability, good leveling property, soft hand feeling, good anti-sticking property, strong hydrolysis resistance, good bending resistance, comfortable and dry surface touch, good light resistance and the like.

The one-liquid hydrolysis-resistant backing material in the embodiment is a low-modulus high-solid backing material, and can improve the softness and the flatness of the erasable microfiber synthetic leather, so that the overall surface of the erasable microfiber synthetic leather has perfect appearance and comfortable hand feeling. The wiping performance of the microfiber synthetic leather can be further improved by regulating and controlling the content of the water splashing agent in the fabric.

The water-based oil skin treating agent prepared by the formula of the embodiment has the characteristics of good modeling, firm bonding, cold resistance, hydrolysis resistance, corrosion resistance, aging resistance, excellent transparent feeling and smooth hand feeling, is firmly bonded with a semi-finished product, and has the function of curing glue to ensure that the surface of the semi-finished product is not easily damaged; the water-based wiping treatment agent has the characteristics of good film forming property and low adhesive force, can adjust the haze, has low bonding fastness with a semi-finished product, is easy to scrape and wipe, and can form a natural weathering effect under the influence of environmental factors in the using process.

In the post-treatment process, the water-based oil skin treatment agent is used for pretreating the surface of the semi-finished product, and then the water-based wiping treatment agent is coated, so that the water-based oil skin treatment agent can protect the semi-finished product from being corroded by the water-based wiping treatment agent, and the problems of unsatisfactory product wiping effect, influence on appearance and the like caused by corrosion of the semi-finished product by the water-based wiping treatment agent are effectively solved. The film forming property, the covering power and the wiping property of the water-based wiping treatment agent on the synthetic leather can be effectively improved by regulating and controlling the coating amount and the mesh number, and if the second plate and the third plate are low in adhesive amount, the film forming property and the covering power of the water-based wiping treatment agent on the synthetic leather are poor; when the amount of the water-based oil skin treating agent of the first edition is low, the adhesion performance of the erasable treating agent and the surface of a semi-finished product is enhanced, and even the semi-finished product is corroded, so that the erasable effect of the product is not ideal; when the adhesive amount is high, the adhesion property of the erasable processing agent and the semi-finished fabric is poor, and the erasable processing agent is easy to fall off during wiping.

It is specifically stated that, since the erasable performance has no national special standard, the patent herein defines the erasable performance of the erasable microfiber synthetic leather: the wet rubbing of a color fastness rubbing instrument is used as a detection method, and the range standard that the color effect of the leather surface basically falls off when wet rubbing is carried out for 30-60 times is used. In addition, it is particularly noted that the swabable microfiber synthetic leather of the present invention is not equal to swabable leather, but the name of the synthetic leather is similar to that of swabable leather.

The technical scheme of the embodiment has the following beneficial effects:

1. the embodiment discloses a production method of a cleanable microfiber synthetic leather, which comprises a manufacturing step of a semi-finished product, a post-treatment process of the semi-finished product, a formula composition of a water-based oil skin treatment agent and a water-based wiping treatment agent and a treatment mode.

2. Through a large amount of researches, the characteristics of good film forming property and low adhesive force of the water-based wiping treatment agent are fully utilized by the inventor, so that the synthetic leather is influenced by environmental factors in the using process to form a natural weathering effect, and the surface of the synthetic leather has a natural antique style.

3. The synthetic leather of the embodiment can be designed according to the requirements of consumers, so that the defect that the traditional synthetic leather is monotonous in style is overcome; in addition, the product made of the synthetic leather can be wiped according to the preference of consumers to form different apparent effects, the appearance of the product can be designed by self, the secondary design of the finished product by the consumers is realized, the self innovation pursuit of the consumers is met, and the consumers have better use feeling and experience feeling.

The following provides a further description of the beneficial effects of the synthetic leather obtained by the technical solution of the present embodiment through several sets of examples and comparative examples.

The first embodiment is as follows:

the embodiment is a preparation method of synthetic leather, which comprises the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 9 parts by mass of color paste and 3 parts by mass of water splashing agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 110g/m²The drying temperature is controlled at 90 ℃, and the drying time is 210 seconds;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 9 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating a middle material by blade, coating a layer of middle material on the release paper coated with the plus material in the step two through a second coating head, and controlling the coating amount to be 140g/m²The drying temperature is controlled at 100 ℃, and the drying time is 210 seconds;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 2 parts of bridging agent and 9 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a primer, namely coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step through a third coating head, wherein the coating weight is controlled to be 180g/m²Drying at 120 deg.C and 150rpm to half-dry, attaching the semi-finished product, and drying at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 145 deg.C to obtain semi-finished product;

step seven: preparing a treating agent, namely preparing 16 parts of polyether polyol, 8 parts of isocyanate, 3 parts of hydrophilic chain extender, 1 part of diamine chain extender, 2 parts of organic silicon and 70 parts of water into an aqueous oil skin treating agent by mass, and preparing 12 parts of polyether polyol, 4 parts of isocyanate, 2 parts of hydrophilic chain extender, 1 part of diamine chain extender, 2 parts of silicon dioxide, 1 part of organic silicon and 78 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the coating amount of the first-version processing wheel is 20g/m for 100 meshes²The second plate treatment wheel has a 60-mesh coating amount of 30g/m²The coating amount of the third version of the treatment wheel is 22g/m for 80-mesh coating²The first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

And the microfiber semi-finished product in the step six needs to be finely ground by 240-mesh fine sand paper before use, and the microfiber specification is 1.15-1.35mm high hydrolysis resistance microfiber.

In the first step, the solid content of the hydrolysis-resistant resin is 30 percent, and the 100 percent modulus is 40-50Kg/cm2 of polyurethane resin.

The performance index detects that the color fastness to light of the synthetic leather is 4-5 grade, and the elongation at break is as follows: weft direction 152%, warp direction 85%, tensile load: warp 711N, weft 588N, tear load: warp 119N, weft 105N, folding endurance: no cracking of PU 10 ten thousand times at normal temperature, no cracking of PU 4 ten thousand times at-15 deg.c and breaking strength higher than 30kgf/cm²(unbroken material), Taber abrasion resistance: h221KG 400 is processed after 400 turns, the wiping material falls off, the PU dry layer is intact, and the peeling load is: 35N/3CM (leather surface is attached and can not be stuck), the peeling load after hydrolysis resistance is 117N/3CM (the leather surface is attached with the conventional microfiber and falls off with the silver effect), the leather slightly falls off after wet friction for 40 times, the leather basically falls off after wet friction for 60 times, and the physical properties meet the design requirements of products.

Example two:

the embodiment is a preparation method of synthetic leather, which comprises the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 9 parts by mass of color paste and 1 part by mass of a water splashing agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 110g/m²The drying temperature is controlled at 90 ℃, and the drying time is 210 seconds;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 9 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating a middle material by blade, coating a layer of middle material on the release paper coated with the plus material in the step two through a second coating head, and controlling the coating amount to be 140g/m²The drying temperature is controlled at 100 ℃, and the drying time is 210 seconds;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 2 parts of bridging agent and 9 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a primer, namely coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step through a third coating head, wherein the coating weight is controlled to be 180g/m²Drying at 120 deg.C and 150rpm to half-dry, attaching the semi-finished product, and drying at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 145 deg.C to obtain semi-finished product;

step seven: preparing a treating agent, namely preparing 18 parts of polyether polyol, 6 parts of isocyanate, 3.5 parts of hydrophilic chain extender, 1 part of diamine chain extender, 1 part of organic silicon and 70.5 parts of water into an aqueous oil skin treating agent by mass, and preparing 10 parts of polyether polyol, 6 parts of isocyanate, 1 part of hydrophilic chain extender, 1 part of diamine chain extender, 3 parts of silicon dioxide, 1 part of organic silicon and 78 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the finished productThe microfiber synthetic leather can be wiped; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the coating amount of the first-version processing wheel is 22g/m for 100 meshes²The second plate treatment wheel has a 60-mesh coating weight of 32g/m²The coating amount of the third version of the treatment wheel is 24g/m for 80-mesh coating²The first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

And the microfiber semi-finished product in the step six needs to be finely ground by 240-mesh fine sand paper before use, and the microfiber specification is 1.15-1.35mm high hydrolysis resistance microfiber.

In the first step, the solid content of the hydrolysis-resistant resin is 30 percent, and the 100 percent modulus is 40-50Kg/cm2 of polyurethane resin.

The performance index detects that the color fastness to light of the synthetic leather is 4-5 grade, and the elongation at break is as follows: weft direction 148%, warp direction 80%, tensile load: warp 688N, weft 598N, tear load: warp direction 109N, weft direction 115N, folding endurance: no cracking of PU 10 ten thousand times at normal temperature, no cracking of PU 4 ten thousand times at-15 deg.c and breaking strength higher than 28kgf/cm²(unbroken material), Taber abrasion resistance: h221KG 400 is processed after 400 turns, the wiping material falls off, the PU dry layer is intact, and the peeling load is: 45N/3CM (leather surface is attached and can not be stuck), the stripping load after hydrolysis resistance is 127N/3CM (leather surface is attached with conventional microfiber and can fall off with silver effect), the leather surface slightly falls off after wet friction for 45 times and basically falls off after wet friction for 60 times, and the physical properties meet the design requirements of products.

Example three:

the embodiment is a preparation method of synthetic leather, which comprises the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 9 parts by mass of color paste and 2 parts by mass of water splashing agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 110g/m²The drying temperature is controlled at 90 ℃, and the drying is carried outThe time is 210 seconds;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 9 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating a middle material by blade, coating a layer of middle material on the release paper coated with the plus material in the step two through a second coating head, and controlling the coating amount to be 140g/m²The drying temperature is controlled at 100 ℃, and the drying time is 210 seconds;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 2 parts of bridging agent and 9 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a primer, namely coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step through a third coating head, wherein the coating weight is controlled to be 180g/m²Drying at 120 deg.C and 150rpm to half-dry, attaching the semi-finished product, and drying at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 145 deg.C to obtain semi-finished product;

step seven: preparing a treating agent, namely preparing 14 parts of polyether polyol, 10 parts of isocyanate, 4 parts of hydrophilic chain extender, 1 part of diamine chain extender, 3 parts of organic silicon and 68 parts of water into an aqueous oil skin treating agent by mass, and preparing 10 parts of polyether polyol, 6 parts of isocyanate, 3 parts of hydrophilic chain extender, 1 part of diamine chain extender, 3 parts of silicon dioxide, 1 part of organic silicon and 76 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the coating amount of the first-version processing wheel is 20g/m for 100 meshes²The second plate treatment wheel has a 60-mesh coating amount of 30g/m²The coating amount of the third version of the treatment wheel is 23g/m for 80-mesh coating²The first version of the three-version processorThe treatment wheel is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with water-based wiping treatment agents.

And the microfiber semi-finished product in the step six needs to be finely ground by 240-mesh fine sand paper before use, and the microfiber specification is 1.15-1.35mm high hydrolysis resistance microfiber.

In the first step, the solid content of the hydrolysis-resistant resin is 30 percent, and the 100 percent modulus is 40-50Kg/cm2 of polyurethane resin.

The performance index detects that the color fastness to light of the synthetic leather is 4-5 grade, and the elongation at break is as follows: weft direction 142%, warp direction 93%, tensile load: warp direction 707N, weft direction 603N, tear load: warp direction 123N, weft direction 112N, folding endurance: no cracking of PU 10 ten thousand times at normal temperature, no cracking of PU 4 ten thousand times at-15 deg.c and breaking strength higher than 31kgf/cm²(unbroken material), Taber abrasion resistance: h221KG 400 is processed after 400 turns, the wiping material falls off, the PU dry layer is intact, and the peeling load is: 38N/3CM (leather surface is attached and can not be stuck), the peeling load after hydrolysis resistance is 117N/3CM (the leather surface is attached with the conventional microfiber and falls off with the silver effect), the leather surface slightly falls off after wet friction for 30 times, and the leather basically falls off after wet friction for 60 times, and the physical properties meet the design requirements of products.

Comparative example one:

the comparative example is a preparation method of synthetic leather, comprising the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 9 parts by mass of color paste and 0 part by mass of water repellent agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 110g/m²The drying temperature is controlled at 90 ℃, and the drying time is 210 seconds;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 9 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating the medium material by blade coating, and performing the step twoCoating a layer of medium material on the release paper coated with the fabric through a second coating head, wherein the coating amount is controlled to be 140g/m²The drying temperature is controlled at 100 ℃, and the drying time is 210 seconds;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 2 parts of bridging agent and 9 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a primer, namely coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step through a third coating head, wherein the coating weight is controlled to be 180g/m²Drying at 120 deg.C and 150rpm to half-dry, attaching the semi-finished product, and drying at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 145 deg.C to obtain semi-finished product;

step seven: preparing a treating agent, namely preparing 16 parts of polyether polyol, 8 parts of isocyanate, 3 parts of hydrophilic chain extender, 1 part of diamine chain extender, 2 parts of organic silicon and 70 parts of water into an aqueous oil skin treating agent by mass, and preparing 12 parts of polyether polyol, 4 parts of isocyanate, 2 parts of hydrophilic chain extender, 1 part of diamine chain extender, 2 parts of silicon dioxide, 1 part of organic silicon and 78 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the coating amount of the first-version processing wheel is 20g/m for 100 meshes²The second plate treatment wheel has a 60-mesh coating amount of 30g/m²The coating amount of the third version of the treatment wheel is 22g/m for 80-mesh coating²The first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

And the microfiber semi-finished product in the step six needs to be finely ground by 240-mesh fine sand paper before use, and the microfiber specification is 1.15-1.35mm high hydrolysis resistance microfiber.

In the first step, the solid content of the hydrolysis-resistant resin is 30 percent, and the 100 percent modulus is 40-50Kg/cm2 of polyurethane resin.

The performance index detects that the color fastness to light of the synthetic leather is 4-5 grade, and the elongation at break is as follows: weft direction 152%, warp direction 85%, tensile load: warp 711N, weft 588N, tear load: warp 119N, weft 105N, folding endurance: no cracking of PU 10 ten thousand times at normal temperature, no cracking of PU 4 ten thousand times at-15 deg.c and breaking strength higher than 30kgf/cm²(unbroken material), Taber abrasion resistance: h221KG 400 is processed after 400 turns, the wiping material falls off, the PU dry layer is intact, and the peeling load is: 74N/3CM (leather surface is pasted and can not be stuck), the peeling load after hydrolysis resistance is 117N/3CM (the leather surface is pasted with the conventional microfiber and has silver effect and falls off), the peeling load slightly falls off for 60 times, and the requirement of product design erasable test is not met. Comparative example two:

the comparative example is a preparation method of synthetic leather, comprising the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 9 parts by mass of color paste and 4 parts by mass of water splashing agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 110g/m²The drying temperature is controlled at 90 ℃, and the drying time is 210 seconds;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 9 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating a middle material by blade, coating a layer of middle material on the release paper coated with the plus material in the step two through a second coating head, and controlling the coating amount to be 140g/m²The drying temperature is controlled at 100 ℃, and the drying time is 210 seconds;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 2 parts of bridging agent and 9 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a primer, namely coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step through a third coating head, wherein the coating weight is controlled to be 180g/m²Drying at 120 deg.C and 150rpm to half-dry, attaching the semi-finished product, and drying at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 145 deg.C to obtain semi-finished product;

step seven: preparing a treating agent, namely preparing 16 parts of polyether polyol, 8 parts of isocyanate, 3 parts of hydrophilic chain extender, 1 part of diamine chain extender, 4 parts of organic silicon and 68 parts of water into an aqueous oil skin treating agent by mass, and preparing 12 parts of polyether polyol, 4 parts of isocyanate, 2 parts of hydrophilic chain extender, 1 part of diamine chain extender, 2 parts of silicon dioxide, 3 parts of organic silicon and 76 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the coating amount of the first-version processing wheel is 20g/m for 100 meshes²The second plate treatment wheel has a 60-mesh coating amount of 30g/m²The coating amount of the third version of the treatment wheel is 22g/m for 80-mesh coating²The first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

And the microfiber semi-finished product in the step six needs to be finely ground by 240-mesh fine sand paper before use, and the microfiber specification is 1.15-1.35mm high hydrolysis resistance microfiber.

In the first step, the solid content of the hydrolysis-resistant resin is 30 percent, and the 100 percent modulus is 40-50Kg/cm2 of polyurethane resin.

The performance index detects that the color fastness to light of the synthetic leather is 4-5 grade, and the elongation at break is as follows: weft direction 149%, warp direction 85%, tensile load: warp 685N, weft 612N, tear load: warp direction 118N, weft direction 103N, folding endurance: PU dry method without breaking for 10 ten thousand times at normal temperatureCracking at-15 deg.C for 4 ten thousand times, no cracking (dropping of erasable agent) and high breaking strength (more than 30 kgf/cm)²(unbroken material), Taber abrasion resistance: h221KG 400 is processed after 400 turns, the wiping material falls off, the PU dry layer is intact, and the peeling load is: 10N/3CM (leather surface is attached and can not be stuck), the peeling load after hydrolysis resistance is 117N/3CM (the leather surface is attached with the conventional microfiber and can fall off with silver effect), the leather slightly falls off after wet friction for 10 times, and the leather basically falls off after 30 times, and the leather is easy to fall off and can not meet the requirement of the product for shoe making.

Comparative example three:

the comparative example is a preparation method of synthetic leather, comprising the following steps:

the method comprises the following steps: preparing a fabric, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 40 parts by mass of butanone, 9 parts by mass of color paste and 3 parts by mass of water splashing agent to prepare the fabric with the viscosity of 2500-;

step two: coating a fabric, passing release paper through a first coating head, coating a layer of fabric on the surface of the release paper, and controlling the coating weight to be 110g/m²The drying temperature is controlled at 90 ℃, and the drying time is 210 seconds;

step three: preparing a medium material, namely uniformly mixing 100 parts by mass of hydrolysis-resistant resin, 40 parts by mass of dimethylformamide, 20 parts by mass of butanone and 9 parts by mass of color paste to prepare the medium material with the viscosity of 5000-6000cps for later use;

step four: coating a middle material by blade, coating a layer of middle material on the release paper coated with the plus material in the step two through a second coating head, and controlling the coating amount to be 140g/m²The drying temperature is controlled at 100 ℃, and the drying time is 210 seconds;

step five: preparing a base material, namely uniformly mixing 100 parts of hydrolysis-resistant resin, 30 parts of dimethylformamide, 10 parts of butanone, 2 parts of bridging agent and 9 parts of color paste by mass to prepare a one-liquid hydrolysis-resistant base material with the viscosity of 8000-10000cps, the solid content of 45 percent and the modulus of 10-25Kg/cm2 for later use;

step six: coating a primer, namely coating a layer of primer on the release paper coated with the plus material and the middle material in the fourth step through a third coating head, wherein the coating weight is controlled to be 180g/m²And at a temperature of 120 ℃ and a blowing speed of 150rDrying to semi-dry under pm condition, attaching microfiber semi-finished product, and drying at 120 deg.C, 125 deg.C, 130 deg.C, 135 deg.C, 140 deg.C, 145 deg.C to obtain semi-finished product;

step seven: preparing a treating agent, namely preparing 16 parts of polyether polyol, 8 parts of isocyanate, 3 parts of hydrophilic chain extender, 1 part of diamine chain extender, 2 parts of organic silicon and 68 parts of water into an aqueous oil skin treating agent by mass, and preparing 12 parts of polyether polyol, 4 parts of isocyanate, 2 parts of hydrophilic chain extender, 1 part of diamine chain extender, 2 parts of silicon dioxide, 1 part of organic silicon and 78 parts of water into an aqueous wiping treating agent by mass;

step eight: post-treatment, namely performing surface treatment on the semi-finished product prepared in the step six by using a three-plate processor, and drying to obtain the erasable microfiber synthetic leather; wherein the temperature of the three-version processor is set to 140-150 ℃, the speed is 6-8 m/min, the 180-mesh coating amount of the first-version processing wheel is 10g/m²The coating amount of the second plate of the treatment wheel is 18g/m for 100 meshes²The coating amount of the third version of the treatment wheel is 15g/m for 150 meshes²The first plate treatment wheel of the three-plate treatment machine is coated with a water-based oil skin treatment agent, and the second plate treatment wheel and the third plate treatment wheel of the three-plate treatment machine are both coated with a water-based wiping treatment agent.

And the microfiber semi-finished product in the step six needs to be finely ground by 240-mesh fine sand paper before use, and the microfiber specification is 1.15-1.35mm high hydrolysis resistance microfiber.

In the first step, the solid content of the hydrolysis-resistant resin is 30 percent, and the 100 percent modulus is 40-50Kg/cm2 of polyurethane resin.

The performance index detects that the color fastness to light of the synthetic leather is 4-5 grade, and the elongation at break is as follows: weft direction 132%, warp direction 98%, tensile load: warp 655N, weft 603N, tear load: warp 134N, weft 109N, folding endurance: no cracking of PU 10 ten thousand times at normal temperature, no cracking of PU 4 ten thousand times at-15 deg.c and breaking strength higher than 30kgf/cm²(unbroken material), Taber abrasion resistance: h221KG 400 is processed after 400 turns, the wiping material falls off, the PU dry layer is intact, and the peeling load is: 80N/3CM (leather facing, not sticking), hydrolysis resistant post peel load 117N/3CM (with conventional microfiber)The silver effect of the leather surface drops off after sticking), and the leather surface is still intact and does not meet the erasable requirement of product design after being wet-rubbed for 60 times.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.