阅读说明：本技术 一种生态防掉毛兔皮的制备方法 (Preparation method of ecological hair-dropping-preventing rabbit fur ) 是由 刘强 李瑶 石佳博 张宗才 刘汉中 王颖 张凯 文斌 滕永亮 于 2020-06-10 设计创作，主要内容包括：本发明公开了一种生态防掉毛兔皮的制备方法。该方法包括以下步骤：(1)浸水；(2)酸肿；(3)消肿脱脂；(4)软化；(5)初鞣；(6)鞣制；(7)中和。本发明方法制备得到的兔皮,具有优异的防水性能、收缩温度高,防掉毛性能好。(The invention discloses a preparation method of ecological hair-dropping-preventing rabbit fur. The method comprises the following steps: (1) soaking in water; (2) swelling due to acidity; (3) swelling reducing and degreasing; (4) softening; (5) primary tanning; (6) tanning; (7) and (4) neutralizing. The rabbit fur prepared by the method has excellent waterproof performance, high shrinkage temperature and good hair falling prevention performance.)

1. The preparation method of the ecological anti-hair-loss rabbit fur is characterized by comprising the following steps:

(1) soaking in water

Placing rabbit skin in a mixed solution containing salt, glutaraldehyde and a preservative, and soaking for 5-8 times, 30-55 min each time; the final concentration of glutaraldehyde in the mixed solution is 0.1-0.5 mL/L;

(2) swelling due to acid

Soaking the soaked rabbit skin for 3-5 times, each time for 30-50 min, by using sulfuric acid with the concentration of 0.7-0.8 mL/L and sodium bisulfite with the concentration of 0.1-0.5 g/L;

(3) detumescence degreasing

Mixing the mixture of anhydrous sodium sulphate and salt with the weight ratio of 1:1 with the rabbit skin after acid swelling treatment, and then standing overnight; then placing the mixture into a degreasing solution, soaking for 30-60 min, and dehydrating and spin-drying;

(4) softening

Mixing halloysite, sal ammoniac and nodular branch of pine in a weight ratio of 1-2: 2-3, grinding, then putting into water, decocting for 40-45min, filtering to obtain a filtrate, cooling the filtrate to 28 ℃, adding ammonium sulfate which is 20-30% of the weight of the filtrate, and uniformly stirring; then adding the rabbit skin treated in the step (3), stirring and soaking for 2-5 hours;

(5) preliminary tanning

Mixing water, soda ash and a compound containing a sulfonic acid group in a weight ratio of 5-10: 0.1-0.5: 0.5-2, then soaking the degreased rabbit skin in the mixture, and stirring the mixture at a constant temperature of 32 ℃ for over night at a speed of 9 r/min;

(6) tanning

Uniformly mixing glutaraldehyde with the concentration of 12-15 mL/L, soda ash with the concentration of 1-5 g/L, salt with the concentration of 40-50 g/L and a fatting agent with the concentration of 0.5-1 mL/L, adjusting the pH value to 5-6, and dividing the mixture into a solution I and a solution II with the volume ratio of 2-3: 1; then, placing the rabbit skin treated in the step (5) in the solution I for tanning for 2-5 h, and then adding the solution II for further tanning for 15-20 h;

(7) neutralization

Placing the tanned rabbit skin in a neutralization solution at the temperature of 32 ℃, rotatably soaking for 20-25 h at the rotating speed of 3-5 r/min, taking out, standing for 5-7 h, and airing; the neutralizing solution comprises water, salt, anhydrous sodium sulphate and polyvinyl alcohol in a weight ratio of 5-10: 0.01-0.05: 0.1-0.5: 0.01-0.05.

2. The method for preparing the ecological rabbit fur for preventing hair loss according to claim 1, wherein the final concentration of glutaraldehyde in step (1) is 0.5 mL/L.

3. The preparation method of the ecological rabbit fur capable of preventing hair loss according to claim 1, wherein the weight ratio of the water, the soda ash and the compound containing the sulfonate group in the step (5) is 5-10: 0.1: 0.5.

4. The method for preparing rabbit fur with ecological hair loss prevention according to claim 1 or 3, wherein the compound containing sulfonate groups is 4-vinylbenzenesulfonic acid, sodium 2-mercaptoethanesulfonate, sodium alcohol ethoxyglycerosulfonate, or sulfamate.

5. The method for preparing rabbit fur with ecological hair loss prevention according to claim 1, wherein the concentration of glutaraldehyde in step (6) is 12 mL/L.

6. The method for preparing ecological rabbit fur for preventing hair loss according to claim 1, wherein the volume ratio of the solution I to the solution II in the step (6) is 2: 1.

7. The method for preparing ecological rabbit fur for preventing hair loss according to claim 1, wherein the weight ratio of red halloysite, sal ammoniac and pine nodular branch is 2:3: 2.

8. The preparation method of the ecological anti-hair-loss rabbit fur according to claim 1, wherein the fatliquor comprises sulfonated succinate and a multivalent metal salt in a weight ratio of 0.5-1: 0.5-1.

9. The method for preparing rabbit fur with ecological hair loss prevention according to claim 8, wherein the multivalent metal salt is trivalent aluminum salt.

Technical Field

The invention belongs to the technical field of leather preparation, and particularly relates to a preparation method of ecological hair-loss-preventing rabbit fur.

Background

Leather has been one of the materials used for warm keeping and decoration by human beings since ancient times, and different animal skins have different toughness and softness. With the improvement of the life quality of people and the enhancement of environmental awareness, soft and comfortable shoes are more and more favored by people.

The rabbit fur is a common fur making raw material fur, the fur of the rabbit fur is dense, smooth and flexible, the hair color is smooth, the fur plate is thin and tough, various colors of fur coats, hats, collars and clothes bands can be made after tanning and dyeing, the rabbit fur is economical and practical, a rabbit fur product is popular with consumers, and at present, the tanned rabbit fur generally has the problems of roughness, harder texture, poor waterproof performance and easy hair falling.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the preparation method of the ecological anti-hair-falling rabbit fur, which can effectively solve the problems that the rabbit fur prepared by the prior art is poor in waterproof performance and easy to hair fall.

In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows:

a preparation method of ecological hair-loss-preventing rabbit fur comprises the following steps:

(1) soaking in water

Placing rabbit skin in a mixed solution containing salt, glutaraldehyde and a preservative, and soaking for 5-8 times, 30-55 min each time; the final concentration of glutaraldehyde in the mixed solution is 0.1-0.5 mL/L;

(2) swelling due to acid

Soaking the soaked rabbit skin for 3-5 times, each time for 30-50 min, by using sulfuric acid with the concentration of 0.7-0.8 mL/L and sodium bisulfite with the concentration of 0.1-0.5 g/L;

(3) detumescence degreasing

Mixing the mixture of anhydrous sodium sulphate and salt with the weight ratio of 1:1 with the rabbit skin after acid swelling treatment, and then standing overnight; then placing the mixture into a degreasing solution, soaking for 30-60 min, and dehydrating and spin-drying;

(4) softening

Mixing halloysite, sal ammoniac and nodular branch of pine in a weight ratio of 1-2: 2-3, grinding, then putting into water, decocting with strong fire for 40-45min, filtering to obtain a filtrate, adding ammonium sulfate which is 20-30% of the weight of the filtrate when the filtrate is cooled to 28 ℃, and uniformly stirring; then adding the rabbit skin treated in the step (3), stirring and soaking for 2-5 hours;

(5) preliminary tanning

Mixing water, soda ash and a compound containing a sulfonic acid group in a weight ratio of 5-10: 0.1-0.5: 0.5-2, then soaking the degreased rabbit skin in the mixture, and stirring the mixture at a constant temperature of 32 ℃ for over night at a speed of 9 r/min;

(6) tanning

Uniformly mixing glutaraldehyde with the concentration of 12-15 mL/L, soda ash with the concentration of 1-5 g/L, salt with the concentration of 40-50 g/L and a fatting agent with the concentration of 0.5-1 mL/L, adjusting the pH value to 5-6, and dividing the mixture into a solution I and a solution II with the volume ratio of 2-3: 1; then, placing the rabbit skin treated in the step (5) in the solution I for tanning for 2-5 h, and then adding the solution II for further tanning for 15-20 h;

(7) neutralization

Placing the tanned rabbit skin in a neutralization solution at the temperature of 32 ℃, rotatably soaking for 20-25 h at the rotating speed of 3-5 r/min, taking out, standing for 5-7 h, and airing; the neutralizing solution comprises water, salt, anhydrous sodium sulphate and polyvinyl alcohol in a weight ratio of 5-10: 0.01-0.05: 0.1-0.5: 0.01-0.05.

Further, the final concentration of glutaraldehyde in step (1) was 0.5 mL/L.

Further, the weight ratio of the water, the soda ash and the compound containing the sulfonic acid group in the step (5) is 5-10: 0.1: 0.5.

Further, the compound containing the sulfonate group is 4-vinylbenzenesulfonic acid, sodium 2-mercaptoethanesulfonate, sodium alcohol ethoxyglycerosulfonate and sulfamate.

Further, the concentration of glutaraldehyde in step (6) was 12 mL/L.

Further, the volume ratio of the solution I to the solution II in the step (6) is 2: 1.

Further, the weight ratio of the red halloysite, the sal ammoniac and the nodular branch of pine is 2:3: 2.

Further, the fat-liquoring agent comprises sulfonated succinic acid ester and polyvalent metal salt in a weight ratio of 0.5-1: 0.5-1.

Further, the polyvalent metal salt is a trivalent aluminum salt.

Further, the final concentration of the salt in the step (1) is 1-30 g/L; the final concentration of the preservative is 0.1-0.3 mL/L.

Further, the preservative was DL 503.

Further, when degreasing is performed in the step (4), the degreasing agent used is sodium dodecyl benzene sulfonate.

The invention has the beneficial effects that:

1. the glutaraldehyde solution with the concentration of 0.1-0.5 mL/L is adopted for treatment during soaking, the effects of shrinking hair follicles and stabilizing hair roots can be achieved, the fur falling amount of skin in the subsequent preparation process is greatly reduced, and the purposes of hair fixation and hair falling prevention are achieved.

2. The enzyme preparation can effectively soften rabbit fur in the treatment process, but the enzyme preparation can bring huge damage to hair follicles of the rabbit fur while softening the rabbit fur, so that a great amount of hair of the rabbit fur is fallen. Therefore, according to the application, natural components of the halloysite, the sal ammoniac and the turpentine are used for treating the rabbit skin, the structure of collagen in the animal skin can be changed by the matching of the ammonium sulfate and the halloysite, the pores of collagen fibers are increased, and the tensile resistance and the softness of the animal skin are further enhanced. In addition, the water resistance and heat resistance of the leather can be effectively improved by using the sal ammoniac and the turpentine, so that the prepared rabbit skin has good waterproof performance and anti-shrinkage temperature.

3. The sulfonic acid substances can permeate at low temperature, are combined with the leather fibers after being heated, and can generate free acid in the combination process, so that the aim of pickling is fulfilled. Meanwhile, pickling is avoided, so that a large amount of industrial salt is prevented from being added in the leather preparation process, industrial salt pollution is avoided, the prepared leather is more environment-friendly, and the subsequent sewage treatment is simple.

4. The sulfonated succinate fat-liquoring agent for leather contains carboxylate radical and sulfite radical in the molecule, has good water emulsifying property and strong binding capacity with leather fiber, and can endow leather with better water washing resistance. And the high-valence aluminum salt can seal redundant carboxyl on collagen molecules and the high-valence aluminum salt, so that the waterproof performance of the prepared rabbit skin is improved, and the aluminum salt can also be used as a tanning agent and can also be used for tanning leather to a certain extent. In addition, glutaraldehyde used in the tanning process also has the function of sealing redundant carboxyl on collagen molecules, so that the rabbit skin prepared through the whole treatment process has excellent waterproof performance.

Detailed Description

The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.