阅读说明：本技术 一种耐汗、耐水洗毛皮及其染色工艺与应用 (Sweat-resistant and water-resistant fur and dyeing process and application thereof ) 是由 董贺翔 李伟新 罗恒祎 于 2021-01-11 设计创作，主要内容包括：本申请涉及毛皮染色的技术领域,尤其是涉及一种耐汗、耐水洗毛皮及其染色工艺与应用,耐汗、耐水洗毛皮染色工艺,包括如下加工步骤：开毛：采用开毛剂对毛皮进行开毛处理；染毛：采用棉用低温活性染料对毛皮进行染色处理；水洗；在本申请的染色工艺中,先用开毛剂将毛的鳞片层打开,为染料顺利进入毛内染色创造了条件；然后采用棉用低温活性染料,在相对较低的温度下就可以染色,在实现对毛染色的同时,保证了皮板的质量；通过本申请的染色工艺染色得到的毛皮,其耐汗褪色高达4级,水洗褪色高达4级,性能优良,能够广泛应用于雪地靴、服装及手套的生产加工中。(The application relates to the technical field of fur dyeing, in particular to a sweat-resistant and water-resistant fur and a dyeing process and application thereof, wherein the sweat-resistant and water-resistant fur dyeing process comprises the following processing steps: opening wool: opening the fur by using an opening agent; dyeing wool: dyeing the fur by using low-temperature reactive dye for cotton; washing with water; in the dyeing process, the scale layer of the wool is firstly opened by the wool opener, so that conditions are created for the dye to smoothly enter the wool for dyeing; then, the cotton low-temperature reactive dye is adopted, dyeing can be carried out at a relatively low temperature, and the quality of the leather board is ensured while dyeing of wool is realized; the fur dyed by the dyeing process has the advantages of sweat fading resistance of up to 4 grades, water washing fading resistance of up to 4 grades, excellent performance and wide application in production and processing of snow boots, clothes and gloves.)

1. A dyeing process for fur with sweat resistance and water resistance is characterized by comprising the following processing steps:

opening wool: opening the fur by using an opening agent;

dyeing wool: dyeing the fur by using low-temperature reactive dye for cotton;

and (5) washing with water.

2. The dyeing process for the sweat-resistant and water-resistant fur according to claim 1, wherein the unhairing step comprises the following steps: adding 13-14L of water and 35-45g of hair opening agent into 1 piece of skin as a reference, and rotating for 85-95 min; adding 3-3.5g of 85% formic acid, and rotating for 15-25min to finish the hair opening.

3. The dyeing process for the sweat-resistant and water-resistant fur according to claim 1, wherein the dyeing steps are as follows: adding 13-14L of 70 ℃ water and 35-45g of low-temperature dyeing auxiliary agent into 1 piece of skin as a reference, and rotating for 25-35 min; adding 85% formic acid, rotating for 15-25min, and adjusting pH to 3.0; adding 45-55g of low-temperature reactive dye for cotton, and rotating for 85-95 min; adding 15-25g of sodium carbonate, and rotating for 15-25 min; adding 15-25g of soda ash, and rotating for 15-25min to finish dyeing.

4. The dyeing process for the sweat-resistant and water-resistant fur according to claim 3, characterized in that: after the second addition of soda ash, the pH of the liquor was adjusted to 7.

5. The dyeing process for the sweat-resistant and water-resistant fur according to claim 1, wherein the water washing step is as follows: adding 13-14L of water, 6-7g of dispersing agent and 6-7g of wool detergent into 1 piece of skin as a reference, and rotating for 15-25 min; adding 13-14L of water and 6-7g of sodium hydrosulfite, and rotating for 15-25 min.

6. The dyeing process for fur resistant to sweat and water washing of claim 1, wherein the step of washing with water further comprises a hand treatment, which comprises the following specific operations: based on 1 piece of skin, 13-14L of water, 13-15g of hand feeling agent and 3-3.5g of 85% formic acid are added, and the mixture is rotated for 15-25 min.

7. The dyeing process for the sweat-resistant and water-resistant fur according to claim 1, characterized in that: the wool opener is a mercerizing agent T-DC.

8. A sweat-resistant, water-fast fur dyed by the dyeing process for sweat-resistant, water-fast fur according to any one of claims 1 to 7, wherein: the sweat fading resistance is grade 4, and the water washing fading is grade 4.

9. Use of a sweat-resistant, water-fast-washable fur according to claim 8, characterized in that: and after finishing the sweat-resistant and water-resistant fur, applying the fur to the production and processing of snow boots, clothes and gloves, and respectively processing the fur to obtain the snow boots, the clothes and the gloves.

Technical Field

The application relates to the technical field of fur dyeing, in particular to a sweat-resistant and water-resistant fur and a dyeing process and application thereof.

Background

Fur is also called fur, fur leather and fur leather, and is a deformed product of leather, and fur leather products are a modern and elegant name, and are called soft gold. For example, products such as cotton leather hats, cotton fur clothing, snow boots and the like belong to fur and leather products. Different from common leather, fur is a fur-integrated product obtained by carrying out a series of operations such as soaking, re-soaking, degreasing, pickling, main tanning, re-tanning, drying and finishing, dyeing and the like on fur-integrated animal skins, and fur plates and fur need to be considered simultaneously when dyeing.

The sweat resistance and the water washing resistance of the traditional fur are generally poor, the main reason is that the acid dye is adopted for dyeing the fur at the present stage, although the fur can be dyed, the acid dye needs to be added with acid for color fixation, and the pH value of a sweat resistance detection liquid in the sweat resistance detection is 9-10, so that the fur dyed by the acid dye has poor sweat resistance, even does not reach the standard; the textile field does not use acid dye because of the poor perspiration resistance, sun-proof and water-washing resistance and easy fading.

In the related art, a process for dyeing wool by using reactive dyes is adopted, but fur is different from wool, and the fur dyeing effect is ensured, and meanwhile, a fur board is ensured not to be damaged. The reactive dye requires high temperature and high alkali, and when the fur is soaked in the dye liquor for a long time at about 90 ℃, the fur plate can shrink and become hard, so that the requirement of the product cannot be met; and when the temperature of the dyeing solution is reduced, the dyeing is not good.

Therefore, the technical problem to be solved by the present invention is to find a dyeing process suitable for fur to dye the fur with desired color and with sweat resistance and water washing resistance.

Disclosure of Invention

In order to solve the problem that dyed fur is poor in sweat resistance and water washing resistance, the application provides the sweat-resistant and water-washing-resistant fur and the dyeing process and application thereof.

In a first aspect, the application provides a dyeing process for fur with sweat resistance and water resistance, which adopts the following technical scheme:

a dyeing process for sweat-resistant and water-resistant fur comprises the following processing steps:

opening wool: opening the fur by using an opening agent;

dyeing wool: dyeing the fur by using low-temperature reactive dye for cotton;

and (5) washing with water.

By adopting the technical scheme, in the dyeing process, the scale layer of the wool is firstly opened by the wool opener, so that conditions are created for the dye to smoothly enter the wool for dyeing; then, the cotton low-temperature reactive dye is adopted, so that dyeing can be smoothly carried out at a relatively low temperature, and the quality of the leather board is ensured while dyeing of wool is realized. The fur dyed by the dyeing process has the advantages of sweat fading resistance of up to 4 grades, water washing fading resistance of up to 4 grades and excellent performance.

Preferably, the method comprises the following steps: the opening step specifically comprises the following steps: adding 13-14L of water and 35-45g of hair opening agent into 1 piece of skin as a reference, and rotating for 85-95 min; adding 3-3.5g of 85% formic acid, and rotating for 15-25min to finish the hair opening.

By adopting the technical scheme, the acidity of formic acid and the swelling effect of formic acid on wool fibers in the dyeing process are stronger, and after the wool scale layer of the wool fibers is opened by the wool opener, the wool scale layer is treated by formic acid, so that the adsorption of dye on the wool fibers in dyeing can be promoted, and the color fixing effect is good.

Preferably, the method comprises the following steps: the dyeing steps are as follows: adding 13-14L of water of 70 ℃ and 35-45g of low-temperature dyeing auxiliary agent into 1 piece of skin as a reference, and rotating for 25-35 min; adding 85% formic acid, rotating for 15-25min, and adjusting pH to 3.0; adding 45-55g of low-temperature reactive dye for cotton, and rotating for 85-95 min; adding 15-25g of sodium carbonate, and rotating for 15-25 min; adding 15-25g of soda ash, and rotating for 15-25min to finish dyeing.

By adopting the technical scheme, because the wool fibers are subjected to the wool opening treatment in the dyeing process, and the wool scale layer is opened, the dyeing can be realized at a lower temperature of 70 ℃ when low-temperature reactive dye is used, and the quality of the leather plate is ensured.

Preferably, the method comprises the following steps: after the second addition of soda ash, the pH of the liquor was adjusted to 7.

By adopting the technical scheme, the pH value is adjusted to 3.0 by using 85% formic acid in the initial dyeing stage, and the main purpose is to enable the low-temperature dyeing auxiliary agent to permeate into wool fibers and lay a foundation for dye permeation and adsorption; after the low-temperature reactive dye for cotton is added, the pH value is adjusted to be high, and the main purpose is to fix the color by combining the reactive dye and wool fibers. Due to the dyeing process, the low-temperature reactive dye can realize the dyeing of wool fibers under the condition that the pH value is 7 neutral, so that the fur board is not damaged, and the fur with sweat resistance and water washing resistance is obtained by dyeing.

Preferably, the method comprises the following steps: the water washing steps are as follows: adding 13-14L of water, 6-7g of dispersing agent and 6-7g of wool detergent into 1 piece of skin as a reference, and rotating for 15-25 min; adding 13-14L of water and 6-7g of sodium hydrosulfite, and rotating for 15-25 min.

By adopting the technical scheme, the auxiliary agent remained on the fur after the dyeing step is washed away, and the excessive low-temperature reactive dye is neutralized and washed away, so that the dyeing effect is ensured, and the sweat resistance and the washing resistance are improved.

Preferably, the method comprises the following steps: the water washing step further comprises hand feeling treatment, and the specific operations are as follows: based on 1 piece of skin, 13-14L of water, 13-15g of hand feeling agent and 3-3.5g of 85% formic acid are added, and the mixture is rotated for 15-25 min.

By adopting the technical scheme, the fur which is not subjected to hand feeling treatment has rough and unsmooth hand feeling, and the fur which is smooth and soft in hand feeling can be obtained after the fur is subjected to hand feeling treatment.

Preferably, the method comprises the following steps: the wool opener is a mercerizing agent T-DC.

By adopting the technical scheme, the mercerizing agent T-DC can effectively and uniformly remove the dense scale layer on the surface of the wool, has small damage to wool fibers, and is beneficial to dyeing the fur in the application.

In a second aspect, the application provides a sweat-resistant and water-resistant fur, which adopts the following technical scheme:

a perspiration-resistant, water-washable fur dyed by the perspiration-resistant, water-washable fur dyeing process as claimed in any one of claims 1 to 7, which has a perspiration-fade resistance of 4-grade and a water-fade resistance of 4-grade.

In a third aspect, the application provides an application of sweat-resistant and water-washable fur, which adopts the following technical scheme:

the application of the sweat-resistant and water-resistant fur is characterized in that the sweat-resistant and water-resistant fur is subjected to after-treatment and then is applied to the production and processing of snow boots, clothes and gloves to be respectively processed to obtain the snow boots, the clothes and the gloves.

Through adopting above-mentioned technical scheme, the fur of this application is resistant sweat, the washing resistance is high, can be applied to in the multiple fine hair product that adds after the processing, and the range of application is wide.

In summary, the present application includes at least one of the following beneficial technical effects:

(1) the fur processed by the dyeing process has the advantages that the tensile strength in the length direction and the tensile strength in the width direction are both more than 16kg/1.27cm, the elongation in the length direction is more than 108%, the elongation in the width direction is more than 65%, the tearing strength in the length direction and the tearing strength in the width direction are both more than 8kg, and all mechanical properties reach the standard and are not lower than the mechanical property of the fur dyed by the acid dye;

(2) the fur has the advantages that the fur fades by washing and has sweat resistance and fading resistance as high as 4 grades, and the performance is excellent;

(3) the fur processed by the dyeing process has the advantages of good permeability, excellent hair surface chromaticity, no wrinkle and shrinkage on the surface of the fur, and excellent performance;

(4) the dyeing process can realize the dyeing of the fur under the neutral conditions of the dyeing temperature of 70 ℃ and the pH value of 7, thereby achieving the effects of energy conservation and consumption reduction.

Drawings

FIG. 1 is a top view of a black fur dyed in example 1;

FIG. 2 is a leather side view of a black fur dyed in example 1;

FIG. 3 is a top view of a black fur dyed in comparative example 2.

Detailed Description

The present application is described in further detail below with reference to specific contents.

The chemical materials in the application are all commercial products, and the specific types and sources are as follows: the wool opener is a wool mercerizing agent T-DC of the Ministry of Qi Seisan-free chemical industry; the formic acid is industrial formic acid, and the mass concentration is 85 percent; selection of low-temperature reactive dye for cottonSUPER BLACK G QQ, or/and WD Black; the low-temperature dyeing auxiliary agent is selected from dye of Beijing Montelai science and technology development Limited liability company, and the model is Montelai-2108A-B; the dispersant is S32782-EL Tamu M, and the type of the wool detergent is LPK-E; the sodium hydrosulfite is made of ancient gold medals, and the purity is 85%; the hand feeling agent is selected from softener B-7 of Hebei Duoweikang textile auxiliary agent Co.

The fur material in this application is selected from sheep fur, and the weight of single fur before opening is about 0.8 kg. It should be noted that in the fur dyeing process, black is the most difficult color to break through, and if the fur can be dyed black smoothly and the sweat resistance and the water washing resistance reach the standard or even are excellent, the dyeing effect of other colors is necessarily good. The following description will take a black fur as an example, and the dyeing process of furs with other colors is the same as that of furs with other colors, but the dyes are replaced by the dye mixture ratio of the required color.

Example 1

A sweat-resistant, water-washable fur which is processed by the following dyeing steps:

opening wool: 3 tanned furs are added into the rotary drum, and the weight of a single fur is 0.7 kg; adding 39L of 25 deg.C water, adding 105g of hair opener, and rotating for 85 min; adding 9g of 85% formic acid, rotating for 15min, draining water, and discharging fur to finish fur opening;

dyeing wool: putting the dehaired fur into a dyeing rotary drum, adding 39L of 70 ℃ water, adding 105g of low-temperature dyeing auxiliary agent, and rotating for 25 min; adding 85% formic acid, rotating for 15min, and adjusting pH to 3.0; adding 135g of low-temperature reactive dye WD black for cotton, and rotating for 85 min; adding 45g of soda ash, and rotating for 15 min; adding 45g of soda ash, rotating for 15min, adjusting the pH value of the dye liquor to 7, draining, discharging fur and finishing dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 39L of 25 ℃ water, 18g of dispersing agent and 18g of wool detergent, and rotating for 15 min; adding 39L of 25 deg.C water and 18g of sodium hydrosulfite, and rotating for 15min to complete water washing; and (5) draining water and producing fur, thus obtaining the sweat-resistant and water-washing-resistant fur.

Example 2

A sweat-resistant, water-washable fur which is processed by the following dyeing steps:

opening wool: 3 tanned furs are added into the rotary drum, and the weight of a single fur is 0.7 kg; adding 39L of 25 deg.C water, adding 105g of hair opener, and rotating for 90 min; adding 9g of 85% formic acid, rotating for 20min, draining water, and discharging fur to finish fur opening;

dyeing wool: putting the dehaired fur into a dyeing rotary drum, adding 39L of 70 ℃ water, adding 105g of low-temperature dyeing auxiliary agent, and rotating for 30 min; adding 85% formic acid, rotating for 20min, and adjusting pH to 3.0; adding 135g of low-temperature reactive dye WD black for cotton, and rotating for 90 min; adding 45g of soda ash, and rotating for 20 min; adding 45g of soda ash, rotating for 20min, adjusting the pH value of the dye liquor to 7, draining, discharging fur and finishing dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 39L of 25 ℃ water, 18g of dispersing agent and 18g of wool detergent, and rotating for 20 min; adding 39L of 25 deg.C water and 18g of sodium hydrosulfite, and rotating for 20min to complete water washing; and (5) draining water and producing fur, thus obtaining the sweat-resistant and water-washing-resistant fur.

Example 3

A sweat-resistant, water-washable fur which is processed by the following dyeing steps:

opening wool: 3 tanned furs are added into the rotary drum, and the weight of a single fur is 0.7 kg; adding 39L of 25 deg.C water, adding 105g of hair opener, and rotating for 95 min; adding 9g of 85% formic acid, rotating for 25min, draining water, and discharging fur to finish opening;

dyeing wool: putting the dehaired fur into a dyeing rotary drum, adding 39L of 70 ℃ water, adding 105g of low-temperature dyeing auxiliary agent, and rotating for 35 min; adding 85% formic acid, rotating for 25min, and adjusting pH to 3.0; adding 135g of low-temperature reactive dye WD black for cotton, and rotating for 95 min; adding 45g of sodium carbonate, and rotating for 25 min; adding 45g of soda ash, rotating for 25min, adjusting the pH value of the dye liquor to 7, draining, discharging fur and finishing dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 39L of 25 ℃ water, 18g of dispersing agent and 18g of wool detergent, and rotating for 25 min; adding 39L of 25 deg.C water and 18g of sodium hydrosulfite, and rotating for 25min to complete water washing; and (5) draining water and producing fur, thus obtaining the sweat-resistant and water-washing-resistant fur.

Example 4

The dyeing procedure for the sweat-resistant, water-fast-washable fur of example 4 differs from that of example 2 in that:

and after the water washing step, hand feeling treatment is also included, and the specific operations are as follows: adding 39L of 25 ℃ water, 39g of hand feeling agent and 9g of 85% formic acid into a water washing rotary drum, and rotating for 15 min; the remaining procedure was the same as in example 2.

Example 5

The dyeing procedure for the sweat-resistant, water-fast-washable fur of example 5 differs from that of example 2 in that:

and after the water washing step, hand feeling treatment is also included, and the specific operations are as follows: adding 39L of 25 ℃ water, 39g of hand feeling agent and 9g of 85% formic acid into a water washing rotary drum, and rotating for 20 min; the remaining procedure was the same as in example 2.

Example 6

The dyeing procedure for the sweat-resistant, water-fast-washable fur of example 6 differs from that of example 2 in that:

and after the water washing step, hand feeling treatment is also included, and the specific operations are as follows: adding 39L of 25 ℃ water, 39g of hand feeling agent and 9g of 85% formic acid into a water washing rotary drum, and rotating for 25 min; the remaining procedure was the same as in example 2.

Example 7

A sweat-resistant, water-washable fur which is processed by the following dyeing steps:

opening wool: 3 tanned furs are added into the rotary drum, and the weight of a single fur is 0.8 kg; adding 40L of 25 deg.C water, adding 120g of hair opener, and rotating for 90 min; adding 10g of 85% formic acid, rotating for 20min, draining water, and discharging fur to finish fur opening;

dyeing wool: putting the dehaired fur into a dyeing rotary drum, adding 40L of 70 ℃ water, adding 120g of low-temperature dyeing auxiliary agent, and rotating for 30 min; adding 85% formic acid, rotating for 20min, and adjusting pH to 3.0; adding 150g of low-temperature reactive dye WD black for cotton, and rotating for 90 min; adding 60g of soda ash, and rotating for 20 min; adding 60g of soda ash, rotating for 20min, adjusting the pH value of the dye liquor to 7, draining water, and discharging fur to finish dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 40L of 25 ℃ water, 20g of dispersing agent and 20g of wool detergent, and rotating for 20 min; adding 40L of 25 deg.C water and 20g of sodium hydrosulfite, and rotating for 20min to complete water washing; draining water and discharging fur;

hand feeling treatment: and (3) adding 40L of 25 ℃ water, 40g of hand feeling agent and 10g of 85% formic acid into a water washing rotary drum, rotating for 20min, draining, and discharging fur to obtain the sweat-resistant and water-resistant fur.

Example 8

A sweat-resistant, water-washable fur which is processed by the following dyeing steps:

opening wool: 3 tanned furs are added into the rotary drum, and the weight of a single fur is 0.9 kg; adding 42L of 25 deg.C water, adding 135g of hair opener, and rotating for 90 min; adding 10.5g of 85% formic acid, rotating for 20min, draining water, and discharging fur to finish fur opening;

dyeing wool: putting the dehaired fur into a dyeing rotary drum, adding 42L of 70 ℃ water, adding 135g of low-temperature dyeing auxiliary agent, and rotating for 30 min; adding 85% formic acid, rotating for 20min, and adjusting pH to 3.0; adding 165g of low-temperature reactive dye WD black for cotton, and rotating for 90 min; adding 75g of soda ash, and rotating for 20 min; adding 75g of soda ash, rotating for 20min, adjusting the pH value of the dye liquor to 7, draining, discharging fur and finishing dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 42L of 25 ℃ water, 21g of dispersing agent and 21g of wool detergent, and rotating for 20 min; adding 42L of 25 deg.C water and 21g of sodium hydrosulfite, and rotating for 20min to complete water washing; draining water and discharging fur;

hand feeling treatment: and (3) adding 42L of 25 ℃ water, 45g of hand feeling agent and 10.5g of 85% formic acid into a water washing rotary drum, rotating for 20min, draining water, and discharging fur to obtain the sweat-resistant and water-resistant fur.

Example 9

A sweat-resistant, water-washable fur which is processed by the following dyeing steps:

opening wool: 3 tanned furs are added into the rotary drum, and the weight of a single fur is 0.8 kg; adding 40L of 25 deg.C water, adding 120g of hair opener, and rotating for 90 min; adding 10g of 85% formic acid, rotating for 20min, draining water, and discharging fur to finish fur opening;

dyeing wool: putting the dehaired fur into a dyeing rotary drum, adding 40L of 70 ℃ water, adding 120g of low-temperature dyeing auxiliary agent, and rotating for 30 min; adding 85% formic acid, rotating for 20min, and adjusting pH to 3.0; adding low-temperature active dye SUPER BLACK G QQ 150G for cotton, and rotating for 90 min; adding 60g of soda ash, and rotating for 20 min; adding 60g of soda ash, rotating for 20min, adjusting the pH value of the dye liquor to 7, draining water, and discharging fur to finish dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 40L of 25 ℃ water, 20g of dispersing agent and 20g of wool detergent, and rotating for 20 min; adding 40L of 25 deg.C water and 20g of sodium hydrosulfite, and rotating for 20min to complete water washing; draining water and discharging fur;

hand feeling treatment: and (3) adding 40L of 25 ℃ water, 40g of hand feeling agent and 10g of 85% formic acid into a water washing rotary drum, rotating for 20min, draining, and discharging fur to obtain the sweat-resistant and water-resistant fur.

Example 10

The black skin of example 10, which differs from the dyeing process of example 4, is: the procedure of example 4 was repeated except that no opening step was performed.

Example 11

The black skin of example 11, which differs from the dyeing process of example 4, is:

the water washing operation is as follows: transferring the dyed fur into a water washing rotary drum, adding 39L of 25 ℃ water, 18g of dispersing agent and 18g of wool detergent, and rotating for 20 min; the rest is the same as in example 4.

Comparative example 1

A black skin, processed by the following dyeing steps:

dyeing wool: putting 3 tanned sheep furs into a dyeing rotary drum, wherein each fur weighs 0.8kg, adding 40L of 70 ℃ water, adding 125g of anhydrous sodium sulphate, adding 40mL of aluminum zirconium leather dyeing auxiliary agent, and rotating for 30 min; adding 150g of acid dye black (water-soluble aniline black), and rotating for 90 min; adding 15mL of 85% formic acid, and rotating for 20 min; adding 15mL of 85% formic acid, and rotating for 20 min; adding 15mL of 85% formic acid, and rotating for 20 min; adding 40g of peregal O-20, and rotating for 30 min; the pH value of the dye solution is 3.7, draining water, and discharging fur to finish dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 40L of 25 ℃ water, and rotating for 20min to finish water washing; and (5) draining water to obtain the black fur.

Comparative example 2

The black fur of comparative example 2, which was the same as the dyeing process of example 4, was different in that the low temperature reactive dye WD black for cotton was replaced with the reactive dye for lanosol CE wool in equal amount, and the rest was the same as example 4.

Comparative example 3

The black fur of comparative example 3, which was the same as the dyeing process of example 4, was different in that the low temperature reactive dye WD black for cotton was replaced with the lanosol reactive dye in equal amount, and the rest was the same as example 4.

Comparative example 4

A black skin, processed by the following dyeing steps:

opening wool: 3 tanned furs are added into the rotary drum, and the weight of a single fur is 0.7 kg; adding 39L of 25 deg.C water, adding 105g of hair opener, and rotating for 90 min; adding 9g of 85% formic acid, rotating for 20min, draining water, and discharging fur to finish fur opening;

dyeing wool: putting the dehaired fur into a dyeing rotary drum, adding 39L of water with the temperature of 85 ℃, adding 105g of low-temperature dyeing auxiliary agent, and rotating for 30 min; adding 85% formic acid, rotating for 20min, and adjusting pH to 3.0; adding 135g of Lanasol CE reactive dye for wool, and rotating for 90 min; adding 45g of soda ash, and rotating for 20 min; adding 45g of soda ash, rotating for 20min, adjusting the pH value of the dye liquor to 7, draining, discharging fur and finishing dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 39L of 25 ℃ water, 18g of dispersing agent and 18g of wool detergent, and rotating for 20 min; adding 39L of 25 deg.C water and 18g of sodium hydrosulfite, and rotating for 20min to complete water washing; draining water and discharging fur;

hand feeling treatment: and (3) adding 39L of 25 ℃ water, 39g of hand feeling agent and 9g of 85% formic acid into a water-washing rotary drum, and rotating for 15min to obtain the black fur.

Comparative example 5

A red skin, which is processed by the following dyeing steps:

dyeing wool: putting 3 tanned sheep furs into a dyeing rotary drum, wherein each fur weighs 0.8kg, adding 40L of 70 ℃ water, adding 125g of anhydrous sodium sulphate, adding 40mL of aluminum zirconium leather dyeing auxiliary agent, and rotating for 30 min; adding acid dye red E10g from BASF corporation, and rotating for 90 min; adding 15mL of 85% formic acid, and rotating for 20 min; adding 15mL of 85% formic acid, and rotating for 20 min; adding 15mL of 85% formic acid, and rotating for 20 min; adding 40g of peregal O-20, and rotating for 30 min; the pH value of the dye solution is 3.7, draining water, and discharging fur to finish dyeing;

washing with water: transferring the dyed fur into a water washing rotary drum, adding 40L of 25 ℃ water, and rotating for 20min to finish water washing; and (5) draining water to obtain the red fur.

Performance detection

The mechanical properties of the skins of examples 1 to 11 and comparative examples 1 to 5 were measured using the following test criteria, the results of which are detailed in table 1:

tensile strength (unit: kg/1.27cm, length direction is more than or equal to 9.0, width direction is more than or equal to 9.0): ASTM D2209-2000 (2015);

elongation (unit:%, length direction is not less than 15, width direction is not less than 15): ASTM D2209-2000 (2015);

tear strength (unit: kg, length direction is more than or equal to 3.5, width direction is more than or equal to 3.5): SATRA PM 162.

TABLE 1 results of mechanical Properties examination of furs of examples 1 to 11 and comparative examples 1 to 5

The test results in table 1 show that the fur plate of the black fur obtained by the dyeing process of the present application is not damaged and destroyed, the tensile strength in the longitudinal direction and the tensile strength in the width direction are both more than 16kg/1.27cm, the elongation in the longitudinal direction is both more than 108%, the elongation in the width direction is both more than 65%, the tear strength in the longitudinal direction and the tear strength in the width direction are both more than 8kg, and all the mechanical properties of the fur are up to the standard and are not lower than the mechanical properties of the fur obtained by dyeing with the acid dye (comparative example 1 and comparative example 5). From the results of example 10 and example 11, it is clear that the mechanical properties of the skin sheets are not significantly affected unless the opening treatment and the sodium hydrosulfite washing treatment steps are performed.

From the results of comparative example 2 and comparative example 3, it is clear that the change of the dye in the dyeing process of the present application to the reactive dye for wool has little influence on the mechanical properties of the leather sheet. From the results of comparative example 4, it is clear that the reactive dyes for fur use, which have a dyeing temperature of 85 ℃, shrink and harden the board of the fur, greatly reduce the tensile strength, elongation and tear strength of the processed fur.

The skins of examples 1-11 and comparative examples 1-5 were tested for water washing and perspiration resistance using the following test criteria:

washing fading (hair surface) (≥ 2.5): AATCC 107-2017;

sweat fading resistance (hair surface) (≥ 3.5): AATCC 15;

percent of pass (%): the washing fading and the sweat-fast fading are higher in grade, the performance is better, a single batch of 24 skins is taken as a statistical unit, a product with washing fading or/and sweat-fast fading less than 3.0 is a defective product, the qualification rate of the single batch of 24 skins in the examples 1-11 is counted, and the calculation mode is as follows: the yield is qualified quantity/24 multiplied by 100%; and 3 skins in a single batch are taken as a statistical unit, and the qualification rate of 3 skins in a single batch of comparative examples 1-5 is counted by the same method. The specific test results of the above properties are shown in Table 2. Wherein, the water washing fading and the sweat fading resistance of each example or comparative example in the table 2 are the best results of the performance in the corresponding batch, and the performance of the specific single fur is detailed in the unqualified reasons in the table 2.

TABLE 2 results of examining the properties of the furs of examples 1 to 11 and comparative examples 1 to 5

The detection results in table 2 show that the black fur dyed by the dyeing process disclosed by the application has excellent performance, and both the washing fading and the perspiration fading resistance of the black fur are basically up to level 4. From the results of the tests of examples 10 and 11, it is clear that the black fur of the present application has an influence on the perspiration resistance and water-washing fading properties without the steps of the opening treatment and the sodium hydrosulfite treatment. From the results of comparative example 1, it can be seen that the dyeing using the acid dye has an acidic dye solution with a pH of 3.7 and a pH of 9 to 10 for sweat resistance detection, so that the sweat resistance is extremely poor, the fixation effect is poor, the fading is very easy, and the dyeing does not reach the standard. From the test results of comparative example 2 and comparative example 3, it can be seen that although the reactive dye for wool is suitable for dyeing wool, it is not suitable for fur-integrated sheep fur in the present application, and the fur obtained after the application does not meet the sweat resistance and washing resistance standards. The detection result of the comparative example 5 shows that even if the color is other than black and has small dyeing difficulty, the perspiration fading resistance and the water washing fading resistance of the fur dyed by the acid reactive dye and the matched dyeing process are still less than 3 and do not reach the standard. In fact, a large number of experiments show that when the acid dye is used for dyeing, the problems of poor sweat resistance and poor washing performance can be caused after the dye is used for more than 0.5g/L, and the problem is solved by the application.

Combining the test data in tables 1 and 2, it can be seen from the test result of comparative example 4 that if the temperature in the dyeing step is increased from 70 ℃ in the present application to 85 ℃, i.e. the temperature is adjusted to the use temperature of the reactive dye for fur, the dyeing effect is still not as good as that of the present application, and the damage to the fur board is caused, which results in the strength of the fur being greatly reduced.

In addition, as shown in fig. 1 and fig. 2, the fur side and the fur side of the black fur dyed by the present application are respectively shown, and it can be seen from the figure that the fur dyed by the present application has good permeability, excellent blackness of the fur side, and no wrinkles and shrinkage on the fur side. Fig. 3 shows a fur dyed with reactive dyes for hair, which is seen to have poor permeability, brown color and no black color under the process parameters of the present application.

Application example 1

The black fur obtained in the embodiment 7 of the application is mechanically finished to obtain a finished product of black fur, and the finished product of black fur is applied to the production and processing of the snow boots to obtain the black fur-added snow boots.

Application example 2

The black fur obtained in the embodiment 7 of the application is mechanically finished to obtain a finished product of black fur, and the finished product of black fur is applied to production and processing of clothes to obtain black woolen clothes with wool.

Application example 3

The black fur obtained in the embodiment 7 of the present application is mechanically finished to obtain a finished black fur, and the finished black fur is applied to the production and processing of woolen gloves to obtain black woolen gloves with woolen furs.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of the present application is not limited by the embodiments of the present application, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.