阅读说明：本技术 一种耐磨汽车革的制备方法 (Preparation method of wear-resistant automobile leather ) 是由 毛力 金柯成 薛建伟 于 2020-11-19 设计创作，主要内容包括：本发明涉及一种耐磨汽车革的制备方法,它包括(1)先将耐磨浆料的各组份在高速搅拌机中高速搅拌后进入密炼机进行首次密炼,得到耐磨浆料,其中高速搅拌时的温度为100-150℃,首次密炼的温度为145-155℃；(2)基材上PU浆料,然后与上述耐磨浆料结合在密炼机中再次密炼,密炼后进入四滚压延机压延平整,其中基材于140-160℃下上PU浆料,再次密炼时的温度为155-165℃,压延温度为160-190℃；(3)最后进入发泡印花机进行发泡压花处理,其中发泡压花处理温度为160-180℃。本发明制得的产品不仅具有较好的机械性能,还具有超高强度特性,其表面强度转数≥6000次。(The invention relates to a preparation method of wear-resistant automobile leather, which comprises the steps of (1) firstly stirring all components of wear-resistant slurry at a high speed in a high-speed stirrer, and then carrying out primary banburying in an internal mixer to obtain the wear-resistant slurry, wherein the temperature during high-speed stirring is 100-155 ℃, and the temperature for primary banburying is 145-155 ℃; (2) the PU sizing agent is coated on the base material, then the base material and the wear-resistant sizing agent are combined in an internal mixer for internal mixing again, the internal mixing is carried out, the mixture enters a four-roll rolling mill for calendering and flattening, wherein the PU sizing agent is coated on the base material at the temperature of 140-160 ℃, the temperature for internal mixing again is 155-165 ℃, and the calendering temperature is 160-190 ℃; (3) finally, the material enters a foaming printing machine for foaming embossing treatment, wherein the foaming embossing treatment temperature is 160-180 ℃. The product prepared by the invention not only has better mechanical property, but also has ultrahigh strength characteristic, and the surface strength revolution is more than or equal to 6000 times.)

1. The preparation method of the wear-resistant automobile leather is characterized by comprising the following steps: which comprises the following steps of,

(1) firstly, stirring all components of the wear-resistant slurry at a high speed in a high-speed stirrer, and then carrying out primary banburying in an internal mixer to obtain the wear-resistant slurry, wherein the temperature during high-speed stirring is 100-155 ℃, and the temperature during primary banburying is 145-155 ℃;

(2) the PU sizing agent is coated on the base material, then the base material and the wear-resistant sizing agent are combined in an internal mixer for internal mixing again, the internal mixing is carried out, the mixture enters a four-roll rolling mill for calendering and flattening, wherein the PU sizing agent is coated on the base material at the temperature of 140-160 ℃, the temperature for internal mixing again is 155-165 ℃, and the calendering temperature is 160-190 ℃;

(3) finally, the material enters a foaming printing machine for foaming embossing treatment, wherein the foaming embossing treatment temperature is 160-180 ℃.

2. The method for preparing the abrasion-resistant automobile leather according to claim 1, wherein the method comprises the following steps: the wear-resistant slurry comprises the following components in parts by weight,

(1) 100 parts of PVC resin powder;

(2) 10-30 parts of TPU resin;

(3) 5-15 parts of a nano composite material;

(4) 10-40 parts of epoxidized soybean oil;

(5) 2-20 parts of color cake;

(6) 3-7 parts of a stabilizer and a foaming agent;

(7) 20-40 parts of ground calcium carbonate.

3. The method for preparing the abrasion-resistant automobile leather according to claim 2, wherein the method comprises the following steps: the PVC resin powder is S-5 type calcium carbide method polyvinyl chloride powder.

4. The method for preparing the abrasion-resistant automobile leather according to claim 2, wherein the method comprises the following steps: the nano composite material is prepared from nano aluminum oxide and nano silicon dioxide according to the mass ratio of 2: 1-1: 2, and compounding.

5. The method for preparing the abrasion-resistant automobile leather according to claim 2, wherein the method comprises the following steps: the average particle size of the nano composite material is 10-30nm, and the specific surface area is more than or equal to 50 m/g.

6. The method for preparing the abrasion-resistant automobile leather according to claim 2, wherein the method comprises the following steps: the stabilizer is one of a potassium zinc stabilizer, a barium zinc stabilizer or a PVC composite stabilizer, and the foaming agent is azodicarbonamide or a mixture containing azodicarbonamide.

7. The method for preparing the abrasion-resistant automobile leather according to claim 2, wherein the method comprises the following steps: the wear-resistant slurry comprises the following components in parts by weight,

(1) 100 parts of PVC resin powder;

(2) 20-30 parts of TPU resin;

(3) 5-10 parts of a nano composite material;

(4) 10-40 parts of epoxidized soybean oil;

(5) 2-20 parts of color cake;

(6) 3-7 parts of a stabilizer and a foaming agent;

(7) 20-40 parts of ground calcium carbonate.

Technical Field

The invention belongs to the field of artificial leather manufacturing, and particularly relates to a preparation method of automobile leather.

Background

The artificial leather is the first substitute for leather facing material and is made of polyvinyl chloride resin, plasticizer and other assistants through heating, melting and adhering to cloth. Is widely applied to the fields of sports goods, furniture, sofas, automobile interiors and the like, and has wide application. As automotive interiors, particularly automotive seat cushion leather, the performances such as friction resistance, aging resistance and the like are required, and the use requirements of general artificial leather are difficult to meet.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to overcome the defects in the prior art and provide a preparation method of wear-resistant automobile leather, and the prepared product not only has better mechanical property, but also has ultrahigh strength characteristic, and the surface strength revolution is more than or equal to 6000 times.

The technical scheme is as follows: in order to solve the technical problems, the preparation method of the wear-resistant automobile leather comprises the following steps,

(1) firstly, stirring all components of the wear-resistant slurry at a high speed in a high-speed stirrer, and then carrying out primary banburying in an internal mixer to obtain the wear-resistant slurry, wherein the temperature during high-speed stirring is 100-155 ℃, and the temperature during primary banburying is 145-155 ℃;

(2) the PU sizing agent is coated on the base material, then the base material and the wear-resistant sizing agent are combined in an internal mixer for internal mixing again, the internal mixing is carried out, the mixture enters a four-roll rolling mill for calendering and flattening, wherein the PU sizing agent is coated on the base material at the temperature of 140-160 ℃, the temperature for internal mixing again is 155-165 ℃, and the calendering temperature is 160-190 ℃;

(3) finally, the material enters a foaming printing machine for foaming embossing treatment, wherein the foaming embossing treatment temperature is 160-180 ℃.

Furthermore, the wear-resistant slurry comprises the following components in parts by weight,

(1) 100 parts of PVC resin powder;

(2) 10-30 parts of TPU resin;

(3) 5-15 parts of a nano composite material;

(4) 10-40 parts of epoxidized soybean oil;

(5) 2-20 parts of color cake;

(6) 3-7 parts of a stabilizer and a foaming agent;

(7) 20-40 parts of ground calcium carbonate.

Further, the PVC resin powder is S-5 type calcium carbide process polyvinyl chloride powder.

Further, the nano composite material is prepared by mixing nano aluminum oxide and nano silicon dioxide according to a mass ratio of 2: 1-1: 2, and compounding.

Furthermore, the average particle size of the nano composite material is 10-30nm, and the specific surface area is more than or equal to 50 m/g.

Further, the stabilizer is one of a potassium zinc stabilizer, a barium zinc stabilizer or a PVC composite stabilizer, and the foaming agent is azodicarbonamide or a mixture containing azodicarbonamide.

Furthermore, the wear-resistant slurry comprises the following components in parts by weight,

(1) 100 parts of PVC resin powder;

(2) 20-30 parts of TPU resin;

(3) 5-10 parts of a nano composite material;

(4) 10-40 parts of epoxidized soybean oil;

(5) 2-20 parts of color cake;

(6) 3-7 parts of a stabilizer and a foaming agent;

(7) 20-40 parts of ground calcium carbonate.

The PVC resin is SG-5 PVC resin, namely S-5 type calcium carbide method polyvinyl chloride, and the resin is prepared into slurry in a powder state.

The TPU resin is thermoplastic polyurethane resin and is used as a plasticizer of PVC, and the using amount of the TPU resin in the slurry is preferably 20-30 parts.

The nano composite material is a nano alumina and nano silica composite material, and the mass ratio of alumina to silica in the composite material is 2: 1-1: 2. the composite material is in a white fluffy powder state, the average particle size is 10-30nm, and the preferred average particle size is 20 nm; the specific surface area is more than or equal to 50 m/g. The material has the advantages of uniform particle size distribution, high purity, high dispersion, low specific surface, high temperature resistance, inertia, strong heat resistance, good formability, stable crystalline phase, high hardness and good size stability, and can greatly improve the strength of PVC products by the synergistic effect when being combined with other components (such as TPU resin, epoxidized soybean oil, heavy calcium and the like). The nanocomposite is preferably used in the formulation in an amount of 5 to 10 parts. Experiments have found that if only one of the nano-materials is used, the strength properties of the artificial leather are reduced.

The epoxidized soybean oil is used as a main plasticizer, so that the product property is improved, and the environmental pollution can be avoided.

The color cake is a common color cake for manufacturing artificial leather and is selected according to different color requirements. Avoiding the use of color cakes containing heavy metals and other forbidden substances.

The stabilizer and the foaming agent are auxiliary agents commonly used for artificial leather production, wherein the stabilizer is preferably a potassium-zinc stabilizer, a barium-zinc stabilizer or a PVC composite stabilizer, and the foaming agent is preferably azodicarbonamide (namely foaming agent AC) or a mixture containing the azodicarbonamide.

The filler in the invention adopts heavy calcium (ground calcium carbonate).

The calendering method is to mix the raw materials of the high-strength PVC slurry for the first time at 145-155 ℃ after stirring the raw materials at a high speed at 100-150 ℃ to obtain the high-strength PVC slurry; the base material is coated with PU (polyurethane) slurry at the temperature of 140-160 ℃, then combined with the high-strength slurry to be subjected to banburying again at the temperature of 155-165 ℃, subjected to banburying, fed into a four-roll rolling mill to be subjected to rolling and flattening at the temperature of 160-190 ℃, and finally subjected to foaming and embossing treatment at the temperature of 160-180 ℃.

Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: according to the invention, part of TPU thermoplastic polyurethane resin is added, and the excellent characteristics of TPU and PVC are fully exerted under the coordination of all components, so that the TPU thermoplastic polyurethane resin can be used as a PVC plasticizer, the problems of plasticizer migration and volatilization existing in part of polyvinyl chloride are solved, and the hardness and the toughness of a product can be improved; the wear-resistant automobile leather prepared by the method not only has good mechanical properties, but also has ultrahigh strength, and the surface strength revolution is more than or equal to 6000 times.

Detailed Description

The present invention will be further described with reference to examples and comparative examples.

Example 1

The wear-resistant slurry comprises the following components in parts by weight: 100 parts of PVC resin powder, 25 parts of TPU resin, 14 parts of a nano-alumina and nano-silica composite material (the mass ratio is 1: 1, the average particle size is 20nm, and the specific surface area is more than or equal to 50 m/g), 30 parts of epoxidized soybean oil, 7 parts of colored cakes, 2 parts of a potassium-zinc stabilizer, 2 parts of a foaming agent and 30 parts of heavy calcium.

Inputting the metered materials into a high-speed stirrer through a pulse feeding machine according to the ingredients, controlling the temperature at 100 ℃ and 150 ℃, fully stirring, and then entering an internal mixer, controlling the temperature at 155 ℃, and internally mixing for several minutes; in addition, after the base material (various fabrics) is reeled, PU slurry is applied, the temperature is controlled at 150 ℃, the fully internally mixed material is combined with the base material applied with the PU slurry, the mixture enters a two-roll open mill, the temperature is controlled at 160 ℃, the mixture enters a four-roll rolling mill, the temperature is controlled at 160-.

The physical and chemical properties of the artificial leather are as follows:

the surface strength revolution is more than or equal to 6000 times. The anti-cracking test method comprises the following steps of 290N of warp tensile load, 211N of weft tensile load, 6% of warp breaking elongation, 15% of weft breaking elongation, 19N of warp tearing load, 17N of weft tearing load, 21N of peeling load and no cracking in an aging test. (performed according to 6.3.11 of GB/T18102-2000, the sample is wiped clean with absorbent gauze, the sample faces upwards, the sample is mounted on an abrasion tester, the grinding wheel is mounted on a bracket, the abrasion is performed under the condition of applying an external force of 4.9N + -0.2N, and the grinding wheel is replaced by 500 turns per abrasion

Example 2

The wear-resistant slurry comprises the following components in parts by weight: 100 parts of PVC resin powder, 15 parts of TPU resin, 8 parts of a nano-alumina and nano-silica composite material (1: 2, the average particle size is 20nm, the specific surface area is more than or equal to 50 m/g), 20 parts of epoxidized soybean oil, 15 parts of colored cakes, 1 part of barium-zinc stabilizer, 3 parts of azodicarbonamide and 20 parts of heavy calcium carbonate.

Inputting the metered materials into a high-speed stirrer through a pulse feeding machine according to the ingredients, controlling the temperature at 100 ℃ and 150 ℃ for fully stirring, and then, entering an internal mixer, controlling the temperature at 152 ℃ for internal mixing for several minutes; in addition, after the base material (various fabrics) is reeled, PU slurry is applied, the temperature is controlled at 150 ℃, the fully internally mixed material is combined with the base material applied with the PU slurry, the mixture enters a two-roll open mill, the temperature is controlled at 160 ℃, the mixture enters a four-roll rolling mill, the temperature is controlled at 160-.

The physical and chemical properties of the artificial leather are as follows:

the surface strength revolution is more than or equal to 6000 times. Warp tensile load 291N, weft tensile load 210N, warp elongation at break 6%, weft elongation at break 14%, warp tearing load 19N, weft tearing load 17N, peeling load 22N, and no cracking in aging test.

Comparative example 1

The same procedure as in example 1 was repeated, except that no TPU resin was used in the abrasion resistant slurry. The mechanical properties of the resulting artificial leather were much lower than those of example 1, and the surface strength revolutions thereof were < 2000 times.

Comparative example 2

Except that the nano-alumina and nano-silica composite material is changed into nano-alumina, the method is the same as the embodiment 1. The mechanical properties of the artificial leather obtained were about 20% lower than those of example 1, and the surface strength revolutions were < 3000.

Comparative example 3

Except that the nano-alumina and nano-silica composite material is changed into nano-silica, the method is the same as the embodiment 1. The mechanical properties of the artificial leather obtained were about 20% lower than those of example 1, and the surface strength revolutions were < 3000 times.

According to the invention, part of TPU thermoplastic polyurethane resin is added, and the excellent characteristics of TPU and PVC are fully exerted under the coordination of all components, so that the TPU thermoplastic polyurethane resin can be used as a PVC plasticizer, the problems of plasticizer migration and volatilization existing in part of polyvinyl chloride are solved, and the hardness and the toughness of a product can be improved; the wear-resistant automobile leather prepared by the method not only has good mechanical properties, but also has ultrahigh strength, and the surface strength revolution is more than or equal to 6000 times.

The present invention provides a thought and a method, and a method and a way for implementing the technical scheme are many, the above is only a preferred embodiment of the present invention, it should be noted that, for a person skilled in the art, a plurality of improvements and modifications can be made without departing from the principle of the present invention, and the improvements and modifications should be regarded as the protection scope of the present invention, and each component not explicitly described in the embodiment can be implemented by the prior art.