A method for imitating fox fur based on improved Tan sheepskin

Abstract

The present invention provides a method for imitating fox fur based on improved Tan sheep skin. The method is based on the coat characteristics of improved Tan sheep, adopts chrome-free tanning technology and combines subsequent straightening and polishing processes of the coat to prepare the improved Tan sheep skin into imitation fox fur fur with coat fineness and smart sensory characteristics similar to those of natural fox fur, and specifically includes pretreatment, pickling, tanning, hair washing, neutralization, hair scalding and polishing steps. The present invention can solve the problems of limited sources and high costs of existing natural fox fur, and can also solve the problems of lack of natural charm and smooth touch of existing artificial fur imitation fox fur fur and difficulty in handling the product after the end of its life cycle. The quality of imitation fox fur fur can be improved on the basis of better meeting ecological and environmental protection requirements, and at the same time, high-value conversion and application of Tan sheep fur can be achieved.

Description

Technical Field

[0001] The invention belongs to the field of fox fur imitation, and relates to a method for imitating fox fur based on improved Tan sheepskin. Background Art

[0002] Fox fur includes natural fur of foxes such as silver fox, blue fox, and red fox, which has the characteristics of fine hair, rich down, soft hand feel, slightly long needle hair, good gloss, and fluffy fur, which is very luxurious. Fox fur is widely used in the accessories of clothing such as coats and collars. However, as a raw material of natural fox fur, the source of fox fur is relatively limited, so it is expensive. At present, there are artificial fur imitation fox fur products on the market, but the existing products cannot achieve the natural charm and smooth touch of natural fur, and the quality is limited. More importantly, artificial fur is difficult to biodegrade after its life cycle ends, which brings serious environmental problems. Therefore, if the natural charm and smooth touch of the existing artificial fur imitation fox fur fur can be improved, and the requirements of ecological environmental protection can be better met, so that the imitation product is easy to handle after the life cycle ends, it will have a positive significance for improving the quality of the existing artificial fur imitation fox fur fur, increasing the environmental protection of the existing artificial imitation fox fur fur, and solving the problem of limited source and high cost of natural fox fur.

[0003] Small-tailed Han sheep have the characteristics of fast development, early maturity, strong fertility, stable genetic performance and strong adaptability. They produce 2 litters per year, with 2 to 6 litters per litter. Its coat density is slightly lower, there is no fluff on the abdomen, the hair strands are clear and obviously curved, and the hair is shorter and less curved than that of Tan lamb. Tan sheep is a local sheep breed unique to my country for fur, especially Tan lamb skin (commonly known as Ermaopi). The hair strand length is generally 7 to 8 cm, the hair spike has 6 to 9 bends, the curvature is uniform, the hair color is white, the luster is pleasing to the eye, and the flower spike is beautiful, but its fertility is weak and single-born. In order to improve the series capacity of Tan sheep, the sheep breed bred by crossbreeding Tan sheep rams and Small-tailed Han sheep ewes (i.e. improved Tan sheep) can improve the reproductive production performance of ewes, and the annual lambing rate can reach 3 to 4 litters. At the same time, the wool fibers of this improved Tan sheep lambskin still have small wavy patterns, but the number of curved waves of the hair spikes is reduced to 5 to 6, the wool fibers are short, only about 2 cm long, and the fineness of the wool fibers is similar to that of Tan lambs, with characteristics such as thicker undercoat and appropriate length and fineness of guard hair.

[0004] Based on the above-mentioned technical status, if relatively low-priced non-fox animal fur, such as the aforementioned improved Tan sheep fur, can be used as raw material to prepare it into imitation fox fur fur with higher quality than the existing artificial fur imitation fox fur fur, it will not only reduce the cost of natural fox fur, but also have a positive effect on realizing the high-value transformation and application of Tan sheep fur and enhancing the economic value of Tan sheep fur. Summary of the invention

[0005] In view of the problems that existing natural fox fur sources are limited and the cost is high, the existing artificial fur imitation fox fur fur lacks natural charm and smooth touch, and the product is difficult to handle after the end of its life cycle, the present invention provides a method for imitating fox fur fur based on improved Tan sheepskin, so as to improve the quality of imitation fox fur fur on the basis of better meeting ecological and environmental protection requirements, and at the same time realize the high-value transformation and application of Tan sheep fur.

[0006] The technical concept adopted by the present invention is mainly: based on the coat characteristics of improved Tan sheep, chrome-free tanning technology is adopted and combined with subsequent coat straightening and polishing processes, the improved Tan sheep fur is prepared into imitation fox fur fur with a coat density and dynamic sensory characteristics similar to natural fox fur.

[0007] In order to achieve the above-mentioned invention object, the technical solution adopted by the present invention is as follows:

[0008] A method for imitating fox fur based on improved Tan sheepskin comprises the following steps:

[0009] (1) Pretreatment

[0010] The salt-dried improved Tan sheep fur is used as raw fur, and the raw fur is washed, soaked and degreased to obtain pretreated fur; the salt-dried improved Tan sheep fur comes from improved Tan sheep, which is obtained by crossbreeding Tan sheep rams with small-tailed Han sheep ewes;

[0011] (2) Acid immersion

[0012] Add water to the striping trough, add sodium chloride to a concentration of 35-45 g / L, add sodium sulfate to a concentration of 15-25 g / L, add a degreasing agent to a concentration of 1.5-3 g / L, add formic acid to adjust the pH value of the bath to 3.2-3.5, put in the pretreated fur, stripe the trough for 20-40 minutes, add acid protease to a concentration of 0.5-1.5 g / L, stripe the trough for 60-90 minutes, stop for 20-40 minutes, strip the trough for 20-40 minutes, add sulfuric acid to a pH value of the bath of 1.8-2.0, strip the trough for 20-40 minutes, then intermittently stripe the trough for 10-14 hours, remove the skin, and let it stand for 36-60 hours; in this step, control the temperature of the bath to be 25-28°C;

[0013] (3) Tanning

[0014] Add water to the groove, add sodium chloride to a concentration of 35-45 g / L, add sodium sulfate to a concentration of 10-20 g / L, add a penetrant to a concentration of 0.5-1 g / L, put in the fur treated in step (2), add a white tanning agent to a concentration of 3-5 g / L, stroke the groove for 60-90 min, stop for 20-40 min, stroke the groove for 20-40 min, then stroke the groove intermittently for 4-6 h, then add baking soda to the groove several times until the pH value of the bath liquid reaches 6.8-7.0, stroke the groove for 30-60 min, and let it stand for 10-14 h; after standing, if the pH value of the bath liquid is ≥6.8, peel off the skin; if the pH value of the bath liquid is <6.8, add baking soda to adjust the pH value of the bath liquid to 6.8-7.0, slide the groove for 120-150 min, and peel off the skin; in this step, the temperature of the bath liquid is controlled to be 30-40°C;

[0015] (4) Washing and neutralization

[0016] Add water to the trough, add detergent to a concentration of 1-2 g / L, put the fur treated in step (3), slide the trough for 120-150 min, and drain the bath liquid; add water to the trough, add sodium chloride to a concentration of 20-30 g / L, add sulfuric acid to a concentration of 0.2-0.4 g / L, add aluminum tanning agent to a concentration of 3-10 g / L, stroke the trough for 20-40 min, stop for 60-90 min, stroke the trough for 20-40 min, stop for 60-90 min, stroke the trough for 20-40 min, add fatliquor to a concentration of 1-3 g / L, slide the trough for 90-120 min, remove the skin and shake off the water; in this step, control the temperature of the bath liquid to be 36-38°C;

[0017] (5) Perming

[0018] Spraying a hair scalding fixative on the fur of the fur treated in step (4), and then scalding the fur on a scalding machine;

[0019] (6) Polishing

[0020] Spraying a polishing agent on the fur of the fur treated in step (5), and performing a polishing treatment on a fur polishing machine;

[0021] In the above steps (2) to (4), water is added to the trough at a ratio of 14 to 18 L of water per raw fur skin.

[0022] In the above technical solution of the method for imitating fox fur based on improved Tan sheepskin, the temperature of the ironing roller of the scalding machine is controlled at 150-170°C in step (5).

[0023] In the technical solution of the method for imitating fox fur based on improved Tan sheepskin, in step (6), the fur is polished at 120-130° C. on a fur polishing machine.

[0024] In the technical solution of the method for imitating fox fur based on improved Tan sheepskin, the specific operations of washing, soaking and degreasing the raw fur in step (1) can be performed with reference to the prior art. A feasible operation of washing, soaking and degreasing the raw fur is as follows:

[0025] Washing the skin: add water to the trough, add sodium chloride to a concentration of 12-18 g / L, add a penetrant to a concentration of 1-3 g / L, add a degreasing agent to a concentration of 0.5-2 g / L, put in the raw skin, soak for 10-14 hours, scratch the trough for 20-40 minutes, and take out the skin;

[0026] Soaking: add water to the trough, add sodium chloride to a concentration of 25-35g / L, add penetrant to a concentration of 1-3g / L, add degreasing agent to a concentration of 0.5-2g / L, add formaldehyde to a concentration of 0.3-0.6g / L, put the washed fur into the trough, row the trough intermittently for 18-20 hours, and take out the skin; control the temperature of the bath liquid to 28-32℃ during soaking;

[0027] Degreasing: add water to the trough, add sodium chloride to a concentration of 25-35g / L, add degreasing agent to a concentration of 3-5g / L, add soda ash to a concentration of 0.3-0.6g / L, put the fur treated with water into the trough, row the trough intermittently for 3-5 hours, remove the skin and shake off the water; control the temperature of the bath liquid to 40-42℃ during degreasing;

[0028] When washing, soaking and degreasing, add water to the trough at a ratio of 14 to 18 L of water per raw fur.

[0029] In the above technical solution of the method for imitating fox fur with improved Tan sheepskin, the hair perming fixative is formed by mixing water, ethanol and formic acid in a mass ratio of 1000:(250-350):(150-250).

[0030] In the technical solution of the method for imitating fox fur based on improved Tan sheepskin, the polishing agent is formed by fully dispersing a brightener and a hair protectant in water, and the concentration of the brightener in the polishing agent is 5-10g / L, and the concentration of the hair protectant is 3-10g / L.

[0031] In the above technical solution of the method for imitating fox fur based on improved Tan sheepskin, the aluminum tanning agent includes at least one of aluminum triformate, basic aluminum sulfate, ammonium alum and potassium alum.

[0032] In the above technical solution of the method for imitating fox fur based on improved Tan sheepskin, the degreasing agent includes at least one of degreasing agent DG-N60, degreasing agent SWE, degreasing agent FG-FU and degreasing agent FDE.

[0033] In the technical solution of the method for imitating fox fur based on improved Tan sheepskin, the intermittent grooving refers to grooving in a manner of continuously grooving for 5 to 10 minutes per hour and stopping for 50 to 55 minutes.

[0034] The present invention also provides imitation fox fur prepared by the above technical solution. The imitation fox fur prepared by the above technical solution has pure white fur, the length and fineness of the needle hair are similar to those of natural fox fur, the fur has the fine and flexible sensory characteristics similar to those of natural fox fur, and the glossiness and softness of the fur of the imitation fox fur are better than those of natural fox fur. Although the density of the fluff of the imitation fox fur is slightly lower than that of natural fox fur, it can still reach the quality of medium natural fox fur.

[0035] Compared with the prior art, the technical solution of the present invention produces the following beneficial technical effects:

[0036] 1. The present invention provides a method for imitating fox fur based on improved Tan sheepskin. The method uses salt-dried improved Tan sheepskin as raw fur, and performs pretreatment, acid immersion, acid immersion, fine hair, neutralization, hair scalding and polishing on the raw fur to obtain a coat color of pure white, needle hair length and fineness similar to natural fox fur, and the coat has a fine and smart sense of similar natural fox fur. At the same time, the glossiness and softness of the coat of the imitation fox fur fur are better than natural fox fur. On the one hand, it can solve the problem of limited sources and high costs of existing natural fox fur, and on the other hand, it can solve the problem that the existing artificial fur imitation fox fur fur lacks natural charm and smooth touch. Since the raw fur used in the present invention is a by-product of the meat processing industry, it is not in the category of animal protection organizations opposing the breeding of fur animals, and has obvious price advantages relative to natural fox fur. Therefore, the present invention can not only improve the quality of imitation natural fox fur, but also reduce costs, and at the same time, it also realizes the high-value conversion application of improved Tan sheep fur.

[0037] 2. The method for imitating fox fur based on improved Tan sheepskin described in the present invention is mainly based on chrome-free tanning, scalding and polishing processes, which realizes the preparation of imitation fox fur, can avoid the discharge of chromium-containing waste liquid and the problem of chromium residue in the product, and can also solve the problem that existing artificial imitation fox fur products are difficult to biodegrade after the end of their life cycle. The present invention can better meet ecological and environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a photograph of the imitation fox fur prepared in Example 1.

[0039] Figure 2 It is a photograph of Tan sheepskin.

[0040] Figure 3 This is a photo of a natural fox fur product. Specific implementation methods

[0041] The following examples further illustrate the method for imitating fox fur based on improved Tan sheepskin provided by the present invention. It is necessary to point out that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. According to the above invention content, the technical personnel in the relevant field make some non-essential improvements and adjustments to the present invention, which still fall within the scope of protection of the present invention.

[0042] In the following embodiments, the commercial reagents such as penetrant, degreasing agent, acid protease, white tanning agent, fatliquor, brightener, hair care agent, as well as aluminum tanning agent and other chemical reagents used are all commercial products on the market and can be directly purchased from the market, for example:

[0043] Penetrant JFC is a condensate of ethylene oxide and higher fatty alcohols. Currently, there are many companies producing this product on the market. Degreaser DG-N60, degreaser SWE, degreaser FG-FU and degreaser FDE are commercial products of Sichuan Dawei Technology Co., Ltd. 537 acid protease is a commercial product of Wuhan Xinhuayang Biological Co., Ltd.; white tanning agent KASTANODC is a commercial product of Beijing Hengpu Technology Co., Ltd.; fatliquor SYNTHOL PD 990, fatliquor SYNTHOL MC-K, fatliquor SYNTHOL FL327, fatliquor SYNTHOL LW are commercial products of Schmidt (Nanjing) Leather Chemicals Co., Ltd.; brightener FB-WL-02 and hair care agent M-60 are commercial products of Beijing Fanbo Chemical Co., Ltd.

[0044] In the following embodiments, the salt-dried improved Tan sheep fur comes from the improved Tan sheep (that is, the fur of the improved Tan sheep is obtained by salt drying). The improved Tan sheep is a sheep breed bred in Wuzhong City, Ningxia, specifically a sheep breed bred by hybridizing Tan sheep rams with small-tailed Han sheep ewes. The wool fibers of the lambskin of this improved Tan sheep have small wavy patterns, the number of curved waves of the hair spikes is usually 5 to 6, the length of the wool fibers is about 2 cm, and the fineness of the wool fibers is similar to that of Tan lamb wool, with the characteristics of rich undercoat and appropriate length and fineness of guard hair.

[0045] Example 1

[0046] In this embodiment, a method for imitating fox fur based on improved Tan sheepskin is provided, and the steps are as follows:

[0047] (1) Pretreatment

[0048] The salt-dried improved Tan sheep skin is used as raw material fur, and the raw material fur is subjected to skin washing, water immersion and degreasing operations to obtain pretreated fur, as follows:

[0049] ① Washing the skin: add water to the trough at the ratio of 15L of water per raw skin, add sodium chloride to a concentration of 15g / L, add penetrant JFC to a concentration of 1.5g / L, add degreasing agent DG-N60 to a concentration of 1g / L, put in the raw skin, soak for 12h, row the trough for 30min, and take out the skin.

[0050] ② Soaking: add water to the trough at the ratio of 15L of water to each raw fur skin, add sodium chloride to the concentration of 30g / L, add penetrant JFC to the concentration of 1g / L, add degreasing agent DG-N60 to the concentration of 1g / L, add formaldehyde to the concentration of 0.5g / L, put in the washed fur skin, and row the trough intermittently for 18 hours in a manner of continuous rowing for 5min per hour and stopping for 55min, and take out the skin; control the temperature of the bath liquid at 30℃ during soaking.

[0051] ③ Degreasing: add water to the trough at the ratio of 15L of water to each raw fur skin, add sodium chloride to the concentration of 30g / L, add degreasing agent SWE to the concentration of 0.5g / L, add degreasing agent FG-FU to the concentration of 2g / L, add degreasing agent FDE to the concentration of 1g / L, add soda ash to the concentration of 0.4g / L, put in the fur skin that has been soaked in water, and row the trough intermittently for 3 hours in a manner of continuous rowing for 5min per hour and stopping for 55min, remove the skin and shake off the water; control the temperature of the bath liquid to 42℃ during degreasing.

[0052] (2) Acid immersion

[0053] Add water to the trough at a ratio of 15L of water per raw fur skin, add sodium chloride to a concentration of 40g / L, add sodium sulfate to a concentration of 20g / L, add degreasing agent SWE to a concentration of 0.8g / L, degreasing agent FG-FU to a concentration of 0.8g / L, add formic acid to adjust the pH value of the bath liquid to 3.2-3.5, put in the pretreated fur skin, stroke the trough for 30 minutes, add 537 acid protease to a concentration of 0.6g / L, stroke the trough for 60 minutes, stop for 30 minutes, stroke the trough for 30 minutes, add sulfuric acid to a pH value of 1.8-2.0 for the bath liquid, stroke the trough for 30 minutes, then stroke the trough intermittently for 12 hours in a manner of continuous stroke of 5 minutes per hour and stop for 55 minutes, take out the skin, and let it stand for 48 hours; in this step, control the temperature of the bath liquid to 25-28°C.

[0054] (3) Tanning

[0055] Add water to the trough at a ratio of 15L of water per raw fur, add sodium chloride to a concentration of 40g / L, add sodium sulfate to a concentration of 15g / L, add penetrant JFC to a concentration of 0.5g / L, put in the fur treated in step (2), add white tanning agent KASTANO DC to a concentration of 3.5 g / L, stroke the groove for 60 minutes, stop for 30 minutes, stroke the groove for 30 minutes, then stroke the groove intermittently for 5 hours in the manner of continuous grooving for 5 minutes and stopping for 55 minutes every hour, then add baking soda to the groove in 4 to 5 times (dissolve the baking soda in water 20 times its mass), wait 40 minutes after each addition of baking soda before adding the next baking soda, until the pH value of the bath liquid is 6.8-7.0, stroke the groove for 40 minutes, and let it stand for 12 hours; after standing, if the pH value of the bath liquid is ≥6.8, peel off, if the pH value of the bath liquid is <6.8, add baking soda to adjust the pH value of the bath liquid to 6.8-7.0, slide the groove for 120 minutes, and peel off; in this step, control the temperature of the bath liquid at 30-40°C.

[0056] (4) Washing and neutralization

[0057] Add water to the trough at a ratio of 15 L of water per raw fur skin, add detergent to a concentration of 1.5 g / L, put the fur skin treated in step (3) into the trough, slide the trough for 120 minutes, and drain the bath liquid; add water to the trough at a ratio of 15 L of water per raw fur skin, add sodium chloride to a concentration of 25 g / L, add sulfuric acid to a concentration of 0.2 g / L, add ammonium alum to a concentration of 8 g / L, stroke the trough for 30 minutes, stop for 60 minutes, stroke the trough for 30 minutes, stop for 60 minutes, stroke the trough for 30 minutes, add fatliquor SYNTHOL PD990 to a concentration of 2 g / L, slide the trough for 90 minutes, remove the skin and shake off the water; in this step, the temperature of the bath liquid is controlled at 36-38°C.

[0058] (5) Perming

[0059] Spray a hair scalding fixative on the fur of the fur treated in step (4), wherein the hair scalding fixative is prepared by mixing water, ethanol and formic acid in a mass ratio of 1000:300:200, and control the temperature of the ironing roller of the scalding machine to 150-170° C. to perform scalding on the scalding machine.

[0060] (6) Polishing

[0061] A polishing agent is sprayed on the fur of the fur treated in step (5), wherein the polishing agent is formed by fully dispersing a brightener FB-WL-02 and a hair protector M-60 in water, wherein the concentration of the brightener FB-WL-02 is 8 g / L, and the concentration of the hair protector M-60 is 5 g / L. The fur is polished on a fur polishing machine at 120-130° C. to obtain imitation fox fur.

[0062] The photo of the imitation fox fur prepared in this embodiment is as follows Figure 1 As shown in the picture, the tan sheepskin tanned with tan sheepskin as raw material is shown in the picture. Figure 2 Photos of natural fox fur products are shown in Figure 3 As shown. Figures 1 to 3 It can be seen that the imitation fox fur prepared in this embodiment has a pure white color, and the length and fineness of the needle hair are similar to those of natural fox fur. The fur has the fine and flexible sensory characteristics similar to those of natural fox fur, and the glossiness and softness of the fur of the imitation fox fur prepared in this embodiment are better than those of natural fox fur, and are also significantly better than those of beach sheep fur. Although the fluff density of the imitation fox fur prepared in this embodiment is slightly lower than that of natural fox fur, it can still reach the quality of medium natural fox fur and is suitable for the requirements of clothing accessories. At the same time, the free formaldehyde content test shows that the free formaldehyde content of the imitation fox fur prepared in this embodiment is less than 10 mg / kg, and the imitation fox fur does not contain chromium.

[0063] Example 2

[0064] In this embodiment, a method for imitating fox fur based on improved Tan sheepskin is provided, and the steps are as follows:

[0065] (1) Pretreatment

[0066] The salt-dried improved Tan sheep skin is used as raw material fur, and the raw material fur is subjected to skin washing, water immersion and degreasing operations to obtain pretreated fur, as follows:

[0067] ① Washing the skin: add water to the trough at the ratio of 14L of water per raw skin, add sodium chloride to a concentration of 12g / L, add penetrant JFC to a concentration of 3g / L, add degreasing agent DG-N60 to a concentration of 2g / L, put in the raw skin, soak for 10 hours, row the trough for 40 minutes, and take out the skin.

[0068] ② Soaking: add water to the trough at the ratio of 14L of water to each raw fur skin, add sodium chloride to the concentration of 25g / L, add penetrant JFC to the concentration of 3g / L, add degreasing agent DG-N60 to the concentration of 2g / L, add formaldehyde to the concentration of 0.6g / L, put in the washed fur, and row the trough intermittently for 20 hours in a manner of continuous rowing for 5min per hour and stopping for 55min, and take out the skin; control the temperature of the bath liquid at 30℃ during soaking.

[0069] ③ Degreasing: add water to the trough at the ratio of 14L of water to each raw fur skin, add sodium chloride to the concentration of 25g / L, add degreasing agent SWE to the concentration of 1g / L, add degreasing agent FG-FU to the concentration of 1.5g / L, add degreasing agent FDE to the concentration of 0.5g / L, add soda ash to the concentration of 0.3g / L, put in the fur skin that has been soaked in water, and row the trough intermittently for 5 hours in a manner of continuous rowing for 5min and stopping for 55min every hour, remove the skin and shake off the water; control the temperature of the bath liquid at 42℃ during degreasing.

[0070] (2) Acid immersion

[0071] Add water to the trough at a ratio of 14L of water per raw fur skin, add sodium chloride to a concentration of 35g / L, add sodium sulfate to a concentration of 15g / L, add degreasing agent SWE to a concentration of 1.2g / L, degreasing agent FG-FU to a concentration of 1.6g / L, add formic acid to adjust the pH value of the bath liquid to 3.2-3.5, put in the pretreated fur skin, stroke the trough for 40min, add 537 acid protease to a concentration of 1g / L, stroke the trough for 90min, stop for 20min, stroke the trough for 20min, add sulfuric acid to a pH value of 1.8-2.0 for the bath liquid, stroke the trough for 40min, then stroke the trough intermittently for 14h in a manner of continuous stroke of 5min per hour and stop for 55min, take out the skin, and let it stand for 60h; in this step, control the temperature of the bath liquid to 25-28℃.

[0072] (3) Tanning

[0073] Add water to the trough at a ratio of 14L of water per raw fur, add sodium chloride to a concentration of 35g / L, add sodium sulfate to a concentration of 20g / L, add penetrant JFC to a concentration of 1g / L, put in the fur treated in step (2), add white tanning agent KASTANO DC to a concentration of 3g / L, stroke the groove for 90min, stop for 20min, stroke the groove for 20min, then stroke the groove intermittently for 6h in the manner of continuous grooving for 5min and stopping for 55min every hour, then add baking soda to the groove in 4-5 times (dissolve the baking soda in water 20 times its mass), wait 40min after each addition of baking soda before adding the next baking soda, until the pH value of the bath liquid is 6.8-7.0, stroke the groove for 20min, and let it stand for 14h; after standing, if the pH value of the bath liquid is ≥6.8, peel off, if the pH value of the bath liquid is <6.8, add baking soda to adjust the pH value of the bath liquid to 6.8-7.0, slide the groove for 120min, and peel off; in this step, control the temperature of the bath liquid at 30-40℃.

[0074] (4) Washing and neutralization

[0075] Add water to the trough at a ratio of 14 L of water per raw fur skin, add detergent to a concentration of 1 g / L, put the fur skin treated in step (3) into the trough, slide the trough for 150 minutes, and drain the bath liquid; add water to the trough at a ratio of 14 L of water per raw fur skin, add sodium chloride to a concentration of 20 g / L, add sulfuric acid to a concentration of 0.3 g / L, add aluminum triformate to a concentration of 5 g / L, stroke the trough for 20 minutes, stop for 90 minutes, stroke the trough for 20 minutes, stop for 90 minutes, stroke the trough for 20 minutes, add fatliquor SYNTHOL PD990 to a concentration of 3 g / L, slide the trough for 90 minutes, remove the skin and shake off the water; in this step, the temperature of the bath liquid is controlled at 36-38°C.

[0076] (5) Perming

[0077] Spray a hair scalding fixative on the fur of the fur treated in step (4), wherein the hair scalding fixative is prepared by mixing water, ethanol and formic acid in a mass ratio of 1000:250:250, and control the temperature of the ironing roller of the scalding machine to 150-170° C. to perform scalding on the scalding machine.

[0078] (6) Polishing

[0079] A polishing agent is sprayed on the fur of the fur treated in step (5), wherein the polishing agent is formed by fully dispersing a brightener FB-WL-02 and a hair protector M-60 in water, wherein the concentration of the brightener FB-WL-02 is 5 g / L, and the concentration of the hair protector M-60 is 10 g / L. The fur is polished on a fur polishing machine at 120-130° C. to obtain imitation fox fur.

[0080] The imitation fox fur prepared in this embodiment has a pure white coat color, and the length and fineness of the needle hair are similar to those of natural fox fur. The coat has the fine and flexible sensory characteristics similar to those of natural fox fur, and the glossiness and softness of the coat of the imitation fox fur prepared in this embodiment are better than those of natural fox fur, and are also significantly better than those of beach sheep fur. Although the fluff density of the imitation fox fur prepared in this embodiment is slightly lower than that of natural fox fur, it can still reach the quality of medium natural fox fur and is suitable for the requirements of clothing accessories. At the same time, the free formaldehyde content test results show that the free formaldehyde content of the imitation fox fur prepared in this embodiment is less than 10 mg / kg, and the imitation fox fur does not contain chromium.

[0081] Example 3

[0082] In this embodiment, a method for imitating fox fur based on improved Tan sheepskin is provided, and the steps are as follows:

[0083] (1) Pretreatment

[0084] The salt-dried improved Tan sheep skin is used as raw material fur, and the raw material fur is subjected to skin washing, water immersion and degreasing operations to obtain pretreated fur, as follows:

[0085] ① Washing the skin: add water to the trough at the ratio of 18L of water per raw skin, add sodium chloride to a concentration of 18g / L, add penetrant JFC to a concentration of 1g / L, add degreasing agent DG-N60 to a concentration of 0.5g / L, put in the raw skin, soak for 14h, row the trough for 20min, and take out the skin.

[0086] ② Soaking: add water to the trough at the ratio of 18L of water to each raw fur skin, add sodium chloride to the concentration of 35g / L, add penetrant JFC to the concentration of 1g / L, add degreasing agent DG-N60 to the concentration of 0.5g / L, add formaldehyde to the concentration of 0.3g / L, put in the washed fur skin, and row the trough intermittently for 20 hours in a manner of continuous rowing for 5min and resting for 55min per hour to take out the skin; control the temperature of the bath liquid at 30℃ during soaking.

[0087] ③ Degreasing: add water to the trough at the ratio of 18L of water to each raw fur skin, add sodium chloride to the concentration of 35g / L, add degreasing agent SWE to the concentration of 2g / L, add degreasing agent FG-FU to the concentration of 2g / L, add degreasing agent FDE to the concentration of 1g / L, add soda ash to the concentration of 0.6g / L, put in the fur skin that has been soaked in water, and row the trough intermittently for 4 hours in a manner of continuous rowing for 5min per hour and stopping for 55min, remove the skin and shake off the water; control the temperature of the bath liquid at 40℃ during degreasing.

[0088] (2) Acid immersion

[0089] Add water to the trough at a ratio of 18L of water per raw fur skin, add sodium chloride to a concentration of 45g / L, add sodium sulfate to a concentration of 25g / L, add degreasing agent SWE to a concentration of 1g / L, degreasing agent FG-FU to a concentration of 1g / L, add formic acid to adjust the pH value of the bath liquid to 3.2-3.5, put in the pretreated fur skin, stroke the trough for 20 minutes, add 537 acid protease to a concentration of 1.5g / L, stroke the trough for 90 minutes, stop for 40 minutes, stroke the trough for 40 minutes, add sulfuric acid to a pH value of 1.8-2.0, stroke the trough for 40 minutes, then stroke the trough intermittently for 10 hours in a manner of continuous stroke of 5 minutes per hour and stop for 55 minutes, take out the skin, and let it stand for 36 hours; in this step, control the temperature of the bath liquid to 25-28°C.

[0090] (3) Tanning

[0091] Add water to the trough at a ratio of 18L of water per raw fur, add sodium chloride to a concentration of 45g / L, add sodium sulfate to a concentration of 10g / L, add penetrant JFC to a concentration of 1g / L, put the fur treated in step (2), add white tanning agent KASTANO DC to a concentration of 5g / L, stroke the groove for 90min, stop for 40min, stroke the groove for 40min, then stroke the groove intermittently for 6h in the manner of continuous 5min per hour and stop for 55min, then add baking soda to the groove in 4-5 times (dissolve the baking soda in water 20 times its mass), wait for 40min after each addition of baking soda before adding the next baking soda, until the pH value of the bath liquid is 6.8-7.0, stroke the groove for 40min, and let it stand for 10h; after standing, if the pH value of the bath liquid is ≥6.8, peel off, if the pH value of the bath liquid is <6.8, add baking soda to adjust the pH value of the bath liquid to 6.8-7.0, slide the groove for 150min, and peel off; in this step, control the temperature of the bath liquid at 30-40℃.

[0092] (4) Washing and neutralization

[0093] Add water to the trough at a ratio of 18 L of water per raw fur skin, add detergent to a concentration of 2 g / L, put the fur skin treated in step (3) into the trough, slide the trough for 120 minutes, and drain the bath liquid; add water to the trough at a ratio of 18 L of water per raw fur skin, add sodium chloride to a concentration of 30 g / L, add sulfuric acid to a concentration of 0.4 g / L, add aluminum triformate to a concentration of 5 g / L, add basic aluminum sulfate to a concentration of 2 g / L, add potassium alum to a concentration of 3 g / L, stroke the trough for 40 minutes, stop for 60 minutes, stroke the trough for 40 minutes, stop for 60 minutes, stroke the trough for 40 minutes, add fatliquor SYNTHOL PD 990 to a concentration of 1 g / L, slide the trough for 120 minutes, remove the skin and shake off the water; in this step, the temperature of the bath liquid is controlled to be 36-38°C.

[0094] (5) Perming

[0095] Spray a hair fixing liquid on the fur of the fur treated in step (4), wherein the hair fixing liquid is formed by mixing water, ethanol and formic acid in a mass ratio of 1000:350:150, and control the temperature of the ironing roller of the hair scalding machine to 150-170° C. to perform hair scalding on the hair scalding machine.

[0096] (6) Polishing

[0097] A polishing agent is sprayed on the fur of the fur treated in step (5), wherein the polishing agent is formed by fully dispersing a brightener FB-WL-02 and a hair protector M-60 in water, wherein the concentration of the brightener FB-WL-02 is 10 g / L, and the concentration of the hair protector M-60 is 3 g / L. The fur is polished on a fur polishing machine at 120-130° C. to obtain imitation fox fur.

[0098] The imitation fox fur prepared in this embodiment has a pure white coat color, and the length and fineness of the needle hair are similar to those of natural fox fur. The coat has the fine and flexible sensory characteristics similar to those of natural fox fur, and the glossiness and softness of the coat of the imitation fox fur prepared in this embodiment are better than those of natural fox fur, and are also significantly better than those of beach sheep fur. Although the fluff density of the imitation fox fur prepared in this embodiment is slightly lower than that of natural fox fur, it can still reach the quality of medium natural fox fur and is suitable for the requirements of clothing accessories. At the same time, the free formaldehyde content test results show that the free formaldehyde content of the imitation fox fur prepared in this embodiment is less than 10 mg / kg, and the imitation fox fur does not contain chromium.

Claims

1. A method for imitating fox fur based on improved Tan sheepskin, characterized in that: The following steps are involved: (1) Preprocessing The salt-dried improved Tan sheep fur is used as raw fur, and the raw fur is washed, soaked and degreased to obtain pretreated fur; the salt-dried improved Tan sheep fur comes from improved Tan sheep, which is obtained by crossbreeding Tan sheep rams with small-tailed Han sheep ewes; (2) Pickling Add water to the trough, add sodium chloride to a concentration of 35-45 g / L, add sodium sulfate to a concentration of 15-25 g / L, add a degreasing agent to a concentration of 1.5-3 g / L, add formic acid to adjust the pH value of the bath to 3.2-3.5, put in the pretreated fur, stroke the trough for 20-40 minutes, add acid protease to a concentration of 0.5-1.5 g / L, stroke the trough for 60-90 minutes, stop for 20-40 minutes, stroke the trough for 20-40 minutes, add sulfuric acid to a pH value of the bath of 1.8-2.0, stroke the trough for 20-40 minutes, then stroke the trough intermittently for 10-14 hours, remove the skin, and let it stand for 36-60 hours; in this step, control the temperature of the bath at 25-28 °C; (3) Tanning Add water to the trough, add sodium chloride to a concentration of 35-45 g / L, add sodium sulfate to a concentration of 10-20 g / L, add penetrant to a concentration of 0.5-1 g / L, put in the fur treated in step (2), add white tanning agent to a concentration of 3-5 g / L, paddle the trough for 60-90 min, stop for 20-40 min, paddle the trough for 20-40 min, then paddle the trough intermittently for 4-6 h, then add baking soda to the trough several times until the pH value of the bath liquid reaches 6.8-7.0, paddle the trough for 30-60 min, and let it stand for 10-14 h; after standing, if the pH value of the bath liquid is ≥6.8, peel off the skin; if the pH value of the bath liquid is <6.8, add baking soda to adjust the pH value of the bath liquid to 6.8-7.0, slide the trough for 120-150 min, and peel off the skin; in this step, control the temperature of the bath liquid to 30-40 °C; (4) Washing and neutralization Add water to the trough, add detergent to a concentration of 1-2 g / L, put the fur treated in step (3), slide the trough for 120-150 min, and drain the bath liquid; add water to the trough, add sodium chloride to a concentration of 20-30 g / L, add sulfuric acid to a concentration of 0.2-0.4 g / L, add aluminum tanning agent to a concentration of 3-10 g / L, stroke the trough for 20-40 min, stop for 60-90 min, stroke the trough for 20-40 min, stop for 60-90 min, stroke the trough for 20-40 min, add fatliquor to a concentration of 1-3 g / L, slide the trough for 90-120 min, remove the skin and shake off the water; in this step, control the temperature of the bath liquid to be 36-38 °C; (5) Hair perming Spraying a hair scalding fixing liquid on the fur of the fur treated in step (4), and then scalding the fur on a scalding machine, controlling the temperature of the ironing roller of the scalding machine to 150-170° C. The hair scalding fixing liquid is formed by mixing water, ethanol and formic acid in a mass ratio of 1000: (250-350): (150-250); (6) Polishing Spraying a polishing agent on the fur of the fur treated in step (5), and performing a polishing treatment on a fur polishing machine at 120-130° C.; the polishing agent is formed by fully dispersing a brightener and a hair protectant in water, wherein the concentration of the brightener is 5-10 g / L, and the concentration of the hair protectant is 3-10 g / L; In the above steps (2) to (4), water is added to the trough at a ratio of 14 to 18 L of water per raw fur.

2. The method for imitating fox fur based on improved Tan sheepskin according to claim 1, characterized in that: In step (1), the raw fur skin is washed, soaked and degreased as follows: Washing the skin: add water to the trough, add sodium chloride to a concentration of 12-18 g / L, add penetrant to a concentration of 1-3 g / L, add degreasing agent to a concentration of 0.5-2 g / L, put in the raw skin, soak for 10-14 hours, stroke the trough for 20-40 minutes, and take out the skin; Soaking: add water to the trough, add sodium chloride to a concentration of 25-35 g / L, add penetrant to a concentration of 1-3 g / L, add degreasing agent to a concentration of 0.5-2 g / L, add formaldehyde to a concentration of 0.3-0.6 g / L, put the washed fur into the trough, and row the trough intermittently for 18-20 hours to remove the skin; control the temperature of the bath liquid to 28-32 ℃ during soaking; Degreasing: add water to the trough, add sodium chloride to a concentration of 25-35 g / L, add degreasing agent to a concentration of 3-5 g / L, add soda ash to a concentration of 0.3-0.6 g / L, put the fur that has been soaked in water into the trough, row the trough intermittently for 3-5 hours, remove the skin and shake off the water; control the temperature of the bath liquid to 40-42 ℃ during degreasing; When washing, soaking and degreasing, add water to the trough at a ratio of 14 to 18 L of water per raw fur.

3. The method for imitating fox fur based on improved Tan sheepskin according to claim 1 or 2, characterized in that: The aluminum tanning agent includes at least one of aluminum triformate, basic aluminum sulfate, ammonium alum and potassium alum.

4. The method for imitating fox fur based on improved Tan sheepskin according to claim 1 or 2, characterized in that: The degreasing agent includes at least one of degreasing agent DG-N60, degreasing agent SWE, degreasing agent FG-FU and degreasing agent FDE.

5. The method for imitating fox fur based on improved Tan sheepskin according to claim 1 or 2, characterized in that: The intermittent grooving paddling refers to paddling the grooves continuously for 5 to 10 minutes per hour and stopping for 50 to 55 minutes.

6. Imitation fox fur prepared by the method according to any one of claims 1 to 5.

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