JP2013136867A - Method of subjecting animal hair fiber to shrink-resistant treatment by means of hydrophobic treatment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of subjecting animal hair fiber to the shrink resistant treatment, which solves the problems of the conventional method such as the decrease of repellency or thermal insulation, the "distortion or sagging" of sweaters in a water washing process, the yellow discoloration due to light and heat, and the decrease of the strength and the elongation of fiber, which are caused by subjecting the animal hair fiber to chemical treatment with such as chlorine-based oxidant and oxygen-based oxidant or physical treatment of such as plasma treatment or corona discharge treatment, either treatment rendering the permanent hydrophobicity of fiber surface that the fiber should originally have to hydrophilicity.SOLUTION: A method of processing animal hair fiber surface comprises the steps of: immersing an animal hair fabric fiber into diamine aqueous solution; squeezing and drying it in the air to remove the moisture on the animal hair fiber; dissolving dibasic acid dichloride into a silicone-based solvent to prepare solution; and immersing the dried animal hair fiber into the solution and squeezing it to coat the surface of the animal hair fiber with a polymer.

Description

  The present invention provides an animal hair fiber having a permanent water-repellent function and an anti-shrinkage treatment method excellent in water-resistant washability and its animal hair product.

  There are a lot of fiber processing technologies that handle the fiber surface. The surface of the synthetic fiber is hydrophobic, and various technologies to make it hydrophilic have been developed. However, the wool fiber is an animal fiber, and the surface of all animal fibers protects the living body. It is hydrophobic to repel water. When wool fibers are made hydrophilic, the heat loss associated with water adsorption / desorption increases, and the life support of living organisms is affected accordingly. Today, most of the developments on the surface treatment of wool fibers are hydrophilization techniques. As a typical example, as a shrink-proofing treatment that suppresses shrinkage of wool during water washing, pretreatment with a chlorinating agent or persulfuric acid is applied to the surface of the wool fiber to make it hydrophilic, and the surface is coated with a hydrophilic polymer. The method is widespread all over the world (chlorinated resin method-CL / Hercoset method: Patent Document 1 (Croix Unshrinkable Wools Limited) as an example. Shrink-proof by making wool hydrophilic. Is added, but the affinity for water is increased, so heat retention is reduced and recontamination is likely to occur, and washing with water such as theta facilitates “elongation” and “blurring”, fiber strength reduction, and photothermal yellowing. Result.

The specific conductivity [cal · in / m ² · sec ° C.] of air is 0.23. When air is 1, the relative conductivity of wool is 9, nylon 10 and cotton 27. Therefore, how much air is taken into the fiber group is closely related to the heat retention of the fiber. Air is hydrophobic, and if the surface of animal fibers including wool is made hydrophilic, the air cannot be strongly held on the fiber surface by hydrophobic bonds, and it can be easily replaced with cold or hot outside air. Become. In addition, when a water droplet is applied to a woolen fabric or the like, air is easily discharged and water penetrates into the fiber group. Of course, there is a major reason that the surfaces of animal fibers are all hydrophobic.

  The present invention is that the surface of wool fibers is coated with a hydrophobic synthetic polymer to impart shrinkage resistance and retain the original hydrophobicity of wool without damaging the original properties of wool. The basic technology that leads this concept is a liquid / liquid interface polymerization method that uses an interface composed of an aqueous phase and an organic phase. Technological development of wool tops and wool fabrics using this interfacial polymerization method (patent document 2) can be traced back to the 1963s, but the organic layer contains perchlorethylene, toluene, Since a solvent made of carbon tetrachloride or the like was used, it was not industrially successful.

  Patent Document 3 discloses a functional processing treatment method such as shrinkage treatment and dyeing, softness, antibacterial, water repellency and the like of animal hair fiber structures such as wool using liquid / liquid interfacial polymerization using an aqueous phase and an organic phase. However, the listed organic solvents are toluene, benzene, chloroform, and stoddard solvent, which are dangerous substances for health and the environment, are flammable, and are not industrialized because they cannot work in a safe working environment. .

  Furthermore, the woolen fabric is immersed in an aqueous phase containing diamine and squeezed, and immediately immersed in a toluene organic solvent in which dibasic acid dichloride is dissolved, and interfacial polymerization is performed using the liquid / liquid interface formed on the surface of the woolen fiber. However, since water adhering to the woolen fabric inevitably enters the organic solvent phase, the dibasic acid dichloride reacts with water to form a dicarboxylic acid, resulting in termination of the interfacial polymerization reaction. How to solve the hydrolysis of this dibasic acid dichloride is a big problem and is not put into practical use.

  In recent years, in the dry cleaning industry due to environmental conservation problems, perchlorethylene is a new non-polluting solvent-silicone solvent (Mitsubishi Heavy Industries Industrial Equipment Co., Ltd., Shin-Etsu Chemical Co., Ltd.-Diasilicone and Green Earth- Substitutes such as the Cleaning Limited Company (Green Earth Ltd. Co.-Silicone Dry) are being implemented.

  Green Earth, Inc. discloses in patent document 4 and patent document 5 cyclic silicon of octamethyl-cyclotetrasiloxane (tetramer), decamethyl-cyclopentasiloxane (pentamer) and dodecamethyl-cyclohexasiloxane (hexamer). On the other hand, a silicone solvent manufactured by Mitsubishi Heavy Industries Industrial Equipment Co., Ltd. is commercially available as linear decamethyltetrasiloxane.

  The critical interfacial tension of wool fibers is said to be 45-50 dyn / cm for single fibers and 30 dyn / cm for fiber groups. Green Earth's silicone solvent has a critical interfacial tension of 17.8 dyn / cm. The silicone solvent can be easily extended to the surface of each single fiber in the wool fiber group, and the interfacial polymerization is uniform. It is meant to be done. On the other hand, in the aqueous treatment of wool fibers, the critical interfacial tension of water is around 72-76 dyn / cm, and in order to “wet” the surface of the wool fibers with water, even if a penetrant is added to the aqueous solution, it is completely “wetted”. It ’s difficult. Therefore, the aqueous solution treatment lacks the uniformity of the treatment as compared with the solvent treatment, and the treatment of the hydrophobic polymer with the aqueous solution medium poses a problem from the uniformity.

  Laws and regulations for environmental conservation are set, but the laws and regulations for tetrachlorethylene are listed in Table 1 (Non-Patent Document 1).

  On the other hand, the legal regulations for silicone solvents are very environmentally friendly solvents as shown in Table 2 (from Non-Patent Document 1). Accordingly, the silicone solvent is a solvent that has no odor, no chemical burn, is easy to handle, and is convenient for performing the interfacial polymerization treatment (Non-patent Document 1).

  When using organic solvents, it is necessary to be able to perform safe operations that are not regulated by the Work Environment Law or Occupational Safety and Health Law, and it is necessary that the solvent is not regulated by the Air Pollution Control Law or Water Pollution Control Law. However, the silicone solvent used in the present invention is compatible with this, and is a solvent that does not mix with water (Water Immiscible). Therefore, a liquid-liquid interface is formed between the water phase and the solvent phase. First, a 0.1 mol / l hexamethylenediamine aqueous solution was placed in a container at room temperature, and then a solution of 0.1 mol / l sebacoyl chloride dissolved in a silicone solvent solution was poured into the container at room temperature. As shown in FIG. 1, it was confirmed that a nylon polymer was formed at the interface between the phase and the solvent phase, and the present invention was followed. FIG. 1 shows an experiment which is the basis of the invention of the present invention. In the figure, I indicates a liquid-liquid interface formed by water and a silicone solvent. From the relationship of specific gravity, the bottom is water and the top is silicone solvent. II in the figure indicates the formation of nylon polymer (white) at the liquid-liquid interface.

  This is because the aqueous phase diamine diffuses into the organic solvent phase and reacts with the dibasic acid chloride to immediately form a nylon polymer at the liquid-liquid interface at room temperature. However, the reaction between dibasic acid chloride and water occurs concomitantly, resulting in dicarboxylic acid and inhibiting the formation of nylon polymer, and therefore, impeding the practical application of the liquid / liquid interfacial polymerization method.

  In order to solve this problem, the present invention immerses a woolen fabric in a diamine aqueous solution, squeezes it, air-drys it to remove moisture on the fiber to form a solid surface, and then forms a silicone solvent solution containing dibasic acid chloride. The present invention was completed by inventing a method for interfacial polymerization by forming a solid / liquid interface by dipping in a solid solution.

  Air-dried to remove moisture on the fiber to form a solid surface means a slightly moist state in a woven fabric made of animal hair fibers, for example, a woolen fabric or a knitted fabric, and has a moisture content of 30-40% (wt. %) Means air drying. When air drying is inappropriate, the water adhering to the woolen fabric or knitted fabric reacts with dibasic acid dichloride dissolved in the silicone solvent in the next step to form a dicarboxylic acid, hindering the interfacial polymerization reaction, and also has a shrink-proof treatment effect. It will be adversely affected.

  When a woven or knitted fabric made of bleached wool fibers is dipped in an aqueous diamine solution and squeezed and air-dried, yellowing may occur due to the basicity of the diamine. In order to solve this problem, after immersing the hair fiber in the diamine aqueous solution of the first bath, squeeze it by immersing only in the silicone solvent of the second bath, and replace the water adhering to the hair fiber with the silicone solvent to remove it. Then, after immersing in a silicone solvent containing dibasic acid chloride in the third bath to form a polymer, the formic acid treatment, water washing and drying may be performed.

  Wool fiber is an amphoteric protein, which is composed of acidic amino acids, basic amino acids, and neutral amino acids. The diamine in the aqueous solution of the first bath in the previous section is converted to acidic amino acids and lipids with carboxyl residues of wool fibers. The water on the surface of the wool fiber is adsorbed and the diamine adheres to the surface of the wool fiber because the water is replaced with the silicone solvent in the second bath described in the previous section.

Japanese Patent Publication No. 61-39430 USA Patent, 3,078,138, Patented Feb. 19,1963 JP-A-10-266078 Japanese translation of PCT publication No. 2002-520508 Special table 2003-518426 gazette

Organized by Nagoya Textile Research Group “Forefront of Dry Cleaning-Silicone Dry System” from Sanyo Electric Techno Create Co., Ltd. (July 27, 2006, Nagoya City Industrial Research Institute)

  The object of the present invention is excellent in water washing resistance without impairing the texture and other properties while maintaining the original water repellency that is one of the characteristics of animal hair fibers, which the above prior art could not achieve. It is intended to provide a non-shrink product.

  The inventor of the present invention has reached the present invention as a result of intensive studies for solving the above-mentioned problems. That is, the present invention squeezes animal hair fibers by immersing them in an aqueous diamine solution, air-dried to form a solid-liquid interface, and dibasic acid chloride or diisocyanate in a silicone solvent that does not cause environmental destruction or work environment deterioration. Dissolve and soak at room temperature for a few seconds to form polyamide and polyurea polymer on the surface of the animal hair fiber. Immediately soak in the formic acid solution without drying and evaporating the silicone solvent adhering to the animal hair fiber. Remove the oligomer, neutralize, wash with water and dry. On the other hand, the silicone solvent adhering to the animal hair fabric has devised a method for recovering the solvent by a separation method based on the difference in specific gravity of the waste liquid after washing with water. The contents of the present invention will be described in detail below.

  According to the present invention, excellent shrinkage resistance can be imparted by treatment with a hydrophobic polymer without impairing the original water repellency of animal hair fibers. Air is hydrophobic and the animal hair fibers treated according to the method of the present invention show strong hydrophobicity, and as a result, the heat retention of the animal hair fiber product in order to strongly hold the micro air layer between the animal hair fibers. It is possible to provide a highly water-repellent animal hair fiber product.

I in the figure indicates the liquid / liquid interface formed by water and the silicone solvent (upper part). II in the figure indicates that a nylon polymer (white) is formed. The shrinkage state of a standard eyelash fabric is shown. A is a standard eyelash fabric treated by the method of Example 1, and B is an untreated standard eyelash fabric.

  The animal hair fiber in the present invention means a natural keratinous fiber made of wool, cashmere, mohair, Angola, camel and the like. Animal hair fiber products mean woven fabrics, knitted fabrics, non-woven fabrics, etc., and mixed use with other fibers such as polyester, acrylic, nylon, aramid, vinyl chloride and other synthetic fibers and silk, cotton, hemp, rayon, etc. Cellulose fibers are included.

  The solvent used in the present invention is an environmentally friendly solvent that is not subject to legal restrictions as a first condition, and is a solvent that does not mix with water (Water Immiscible) as a second condition. A liquid interface is formed, and the third condition is that the solvent must be inert. As a solvent that meets these conditions, linear silicon manufactured by Mitsubishi Heavy Industries Industrial Equipment Co., Ltd., that is, decamethyltetrasiloxane and cyclic silicon manufactured by Green Earth, that is, octamethyl-cyclotetrasiloxane (tetramer), Examples include decamethyl-cyclopentasiloxane (pentamer) and dodecamethyl-cyclohexasiloxane (hexamer). Therefore, a preferable solvent is a siloxane solvent, and linear or environmental silicone is exemplified. Particularly preferred is diamond silicone manufactured by Mitsubishi Heavy Industries Industrial Equipment Company.

  Next, the processing method of the present invention will be described. After scouring the above-mentioned animal hair fiber product, for example, a woolen fabric by a conventional method, it is immersed in an aqueous solution containing a water-soluble diamine, a penetrating agent and, if necessary, an alkali agent, so that the surface of the woolen fabric becomes wet. Next, squeeze to about 50% (wt%) with mangle, air dry without applying heat, then immerse in the silicone solvent containing dibasic acid chloride at room temperature and squeeze to about 80% (wt%). After that, it is immersed in about 3% (v / v%) formic acid aqueous solution at 30-50 ° C. and washed with water and neutralized to form a polyamide thin film on the fiber surface of animal hair fibers. Diisocyanates and epoxies that react with diamines can be used instead of acid chlorides.

  The penetrant used in the present invention is not particularly limited, but a penetrant having a penetrating ability at a low temperature is desirable. An alkaline agent is used to remove hydrochloric acid produced by reacting with diamine and dibasic acid chloride. Examples of the alkaline agent include sodium hydroxide, sodium carbonate, and sodium silicate, but they may not be used. However, the amount of diamine used may be about 0.03 to 0.7 mol / l. When using an alkaline agent, it is better to use as little as possible in consideration of yellowing of animal hair fibers. The amount may be about 0.003 to 0.07 mol / l. The penetrant may be from 0.1 to 2.0% soln.

  Examples of the water-soluble diamine used in the present invention include aliphatic diamines such as ethylenediamine, trimethylenediamine, tetramethylenediamine, pentamethylenediamine, hexamethylenediamine, and octamethylenediamine, paraphenylenediamine, metaphenylenediamine, paraphenylenediamine, Aromatic diamines such as metaphenylene diamine, para-xylene diamine, and meta-xylene diamine are exemplified, but the diamine is not particularly limited thereto, and these diamines may be used in combination.

  Dibasic acid chlorides used in the present invention include aliphatic dicarboxylic acid chlorides such as succinic acid chloride, adipic acid chloride, pimelic acid chloride, suberic acid chloride, azelaic acid chloride, sebacic acid chloride, cyclohexanedicarboxylic acid chloride, and terephthalic acid. Examples include aromatic dicarboxylic acid chlorides such as chloride, isophthalic acid chloride and orthophthalic acid chloride, and bischloroformate such as hexanediol bischloroformate and decandiol bischloroformate, but are not limited thereto. Further, these dibasic acid chlorides may be used in combination.

  Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. However, the present invention is not limited by the following examples, but may be appropriately modified within a range that can meet the above-mentioned purpose. Any implementation is within the scope of the present invention.

(Processed sample)
Washing resistance was evaluated using a standard woolen fabric prepared by the method described in IWS TM 31 set for evaluating the shrink-proof performance of wool fibers. The criteria are shown in Table 3.

(Shrinkage evaluation)
The water wash resistance was evaluated according to IWS TM 31 based on ISO 6330. As an evaluation rule,
“Elongation”: indicates an increase in length or width dimension caused by washing, expressed as a positive (+) dimension change.
“Shrinkage”: indicates a decrease in length or width dimension caused by washing, expressed as a negative (−) dimension change.
It is defined by the ISO 6330 5A and 7A wash cycle programs, both programs run at a reduced load of 1 kg, and the wash cycle and number of washings are determined by the product.
As a calculation formula, the relaxation dimensional change in the width (WS) and length (LS) directions, the felt shrinkage, and the total shrinkage are calculated by the following formulas.
Relaxed dimensional change rate (%) = (RM-OM) / OM x 100
Felt shrinkage (%) = (FM-RM) / RM x 100
Total shrinkage (%) = (FM-OM) / OM x 100
OM = Master
RM = measured value after relaxation treatment
FM = measured value after felt treatment The area shrinkage rate is calculated by the following formula for both relaxation shrinkage and felt shrinkage.
Area shrinkage (%) = WS + LS-(WS x LS) x 100

(Texture evaluation)
For untreated worsted fabrics, “◎” indicates a good texture, “○” indicates a similar texture, and “×” indicates a coarse and slightly unsatisfactory texture. As evaluated.

(Water repellency evaluation)
The water-repellent performance was tested according to the spray test of JIS L 1092-1992 and the described evaluation criteria, and evaluated based on the criteria in Table 4.

Example 1
After immersing the woolen fabric in the following solution-1 and reducing the moisture to the woolen fabric to about 50%, and then adjusting the moisture content of the woolen fabric to 35% by blowing hot air of 30 ° C. onto the woolen fabric. Then, it is immersed in the following solution-2, the squeezing rate is increased to 80%, and this state is retained for several seconds to complete the solid-liquid interface polymerization reaction, and then with a 3% formic acid (85%) aqueous solution, It was washed with water at a temperature of 30 to 40 ° C., adhered onto the woolen fabric to remove the oligomer, washed with water and dried. As a point to be specially noted in the processing operation, Example 1 could be followed without odor or chemical burn.
Solution-1 (aqueous phase)
Hexamethylenediamine 0.3mol / l
Wetting agent (Taditol, TMN Union Carbide) 0.1% soln.
Water residual solution-2 (solvent phase)
Sebacoyl chloride 0.3mol / l
Diamond silicone (Mitsubishi Heavy Industries Industrial Co., Ltd.)
As a result of washing 5 times with the 5A program using the Wascater testing machine described in IWS TM 31, the area shrinkage ratio of the untreated eyelash fabric (FIG. 2-B) shows “shrinkage” of −63.8%, The area shrinkage rate of the worsted fabric treated in Example 1 (FIG. 2-A) showed “shrinkage” of −1.0%. The contraction state of both samples is shown in FIG.

(Example 2)
The same treatment was performed on the sample shown in Example 1 by changing the solutions-1 and -2 of Example 1 to the following solutions -3 and -4.
Solution-3 (aqueous phase)
Hexamethylenediamine 0.2mol / l
Osmotic agent (Taditol, TMN Union Carbide) 0.1% soln.
Water residual solution-4 (solvent phase)
Sebacoyl chloride 0.2mol / l
Diamond silicone (Mitsubishi Heavy Industries Industrial Co., Ltd.)

(Example 3)
The same treatment was performed on the sample shown in Example 1, except that the compositions of Solutions-1 and -2 in Example 1 were changed to Solutions-5 and -6 below.
Solution-5 (aqueous phase)
Hexamethylenediamine 0.1mol / l
Osmotic agent (Taditol, TMN Union Carbide) 0.1% soln.
Water residual solution-6 (solvent phase)
Sebacoyl chloride 0.1mol / l
Diamond silicone (Mitsubishi Heavy Industries Industrial Co., Ltd.)

Example 4
The same treatment was performed on the sample shown in Example 1 by changing the composition of Solution-1 of Example 1 to the following Solution-7.
Solution-7 (aqueous phase)
Polyethyleneimine (30% ingredient) 5% soln.
(Nacalai Tesque)
Wetting agent (Taditol, TMN Union Carbide) 0.1% soln.
Water remaining

(Example 5)
The same treatment was performed on the sample shown in Example 1, except that the composition of Solution-1 in Example 1 was changed to the following Solution-8.
Solution-8 (aqueous phase)
Polyethyleneimine (30% ingredient) 5% soln.
(Nacalai Tesque)
Hexamethylenediamine 0.15mol / l
Wetting agent (Taditol, manufactured by TMN Union Carbide) 0.1% soln.
Water remaining

(Example 6)
Processed according to the method described in Example 1. However, after the treatment of Solution-1 (aqueous phase), it is immersed in a solvent containing only a normal temperature silicone solvent, the water on the woolen fabric is replaced with a silicone solvent, and the drawing rate is reduced to about 80%. The (solvent phase) treatment was carried out.

(Comparative Example 1)
After the woolen fabric was dipped in solution-1, it was squeezed to 100% with mangle and directly dipped in solution-2 without air drying. Otherwise, it was processed according to Example 1. Due to the excess water adhering to the woolen fabric, Solution-2 was immediately clouded, and the sebacoyl chloride hydrolyzate was adhering to the surface of the woolen fabric.

(Comparative Example 2)
The woolen fabric was dipped in solution-1, then squeezed to 100% with mangle, and then dipped in a solution that was replaced with toluene instead of the silicone solvent in solution-2. Otherwise, the method of Example 1 was followed. There is an irritating odor of toluene, there is irritating pain on the skin, and moisture adhering to the woolen fabric reacts with the sebacoyl chloride contained in the toluene, resulting in white turbidity, and the sebacoyl chloride hydrolyzate on the surface of the woolen fabric. It was attached.

  From Table 5 summarizing the above results, the woolen fabric is immersed in an aqueous diamine solution and then air-dried or water is replaced with a silicone solvent to make the woolen fabric a solid / liquefied surface, and then dibasic acid chloride. It was found that the wool fabric was imparted with a shrink-proof property without hydrophilizing the wool surface by forming a polyamide polymer at the solid-liquid interface by soaking in the solvent phase. Since the hydrophobic polymer was treated with a hydrophobic medium, the polymer could be treated uniformly. As a result, it was found that the texture is not lowered because the amount of resin can be reduced and the treatment can be performed uniformly. Considering Example 1 and Comparative Example 1, when the woolen fabric moves from the aqueous phase to the solvent phase, moisture attached to the woolen fabric always enters the solvent phase and hydrolyzes the dibasic acid dichloride. Drug fatigue of dibasic acid dichloride is severe, complicating concentration management, and greatly affecting production costs. As a means for solving this problem, the solid-liquid interface polymerization disclosed in the present invention is an important measure.

  Carbon tetrachloride, benzene, toluene, trichloroethylene, chloroform, Socal 25, Stoddard Solvent, perchlorethylene, etc., which are disclosed for liquid-liquid interfacial polymerization, are regulated substances from the standpoint of protecting the global environment. The production process using this is very limited. As a means for solving this problem, there is a silicone solvent. The present invention clarifies that an interfacial polymerization reaction is possible even when a silicone solvent is used. When a woolen fabric moves from a diamine aqueous solution phase to a silicone solvent phase from the production operation, it is air-dried after the diamine aqueous solution treatment. Thus, it has been disclosed that solid-liquid interfacial polymerization is possible by removing water adhering to the woolen fabric or replacing water with a silicone solvent.

  Processing of animal hair fibers using solvents has been avoided from problems such as air pollution, water pollution, occupational health, work environment, waste treatment, soil contamination, etc., but the inorganic silicone solvent implemented in the present invention Can be used to prevent shrinkage of new animal hair fibers without impairing the water repellency, which is the original characteristic of animal hair fibers, and because the interfacial polymerization reaction is carried out instantaneously at room temperature, It is also revolutionary in that it can contribute to saving water.

Claims (8)

  An animal hair fiber product of animal fiber coated with polyamide on the surface, and the area shrinkage rate when washed 5 times with 5A program according to ISO WS 31 based on ISO 6330 is -15.8 to -1.0%. And an animal hair fiber product having an evaluation result of 3 to 5 when the water-repellent performance is tested according to the spray test and evaluation criteria of JIS L 1092-1992   The animal hair fiber product according to claim 1, wherein the animal hair fiber is a natural keratinous fiber composed of wool, cashmere, mohair, Angola, and camel.   Selected from the group containing linear or cyclic siloxanes consisting of tetramers, pentamers, and hexamers, which are solvents that are not mixed with water and are not subject to environmental regulations, with diamines attached to animal hair fibers. 2. A siloxane solvent produced by a processing method in which a surface of an animal hair fiber is coated with a polyamide polymer by dipping in a solution obtained by dissolving a dibasic acid chloride selected from aliphatic or aromatic dibasic acid chlorides in a siloxane solvent. Or the animal hair fiber product of 2.   The animal hair fiber product according to claim 3, wherein in the processing method, the animal hair fiber is dipped in an aqueous diamine solution selected from aliphatic or aromatic diamines, squeezed and air-dried.   In the processing method, the animal hair fiber is immersed in a diamine aqueous solution selected from aliphatic or aromatic diamines and then squeezed, and then immersed in a silicone solvent to replace the water on the animal hair fiber surface with the silicone solvent. The animal hair fiber product according to claim 3.   In the processing method, animal fibers are treated with polymer and then treated with formic acid to remove oligomers produced on the surface of animal hair fibers, and are not mixed with water and are not subject to legal regulations for environmental conservation and tetramers, The animal hair fiber product according to claim 3, wherein a siloxane solvent selected from the group comprising linear or cyclic siloxanes comprising pentamers and hexamers is separated and recovered by utilizing a difference in specific gravity with water.   The animal hair fiber product according to any one of claims 1 to 6, wherein the animal hair fiber product comprises a woven fabric, a knitted fabric, or a nonwoven fabric.   The animal hair fiber product according to any one of claims 1 to 7, further comprising a fiber selected from the group consisting of polyester, acrylic, nylon, aramid, vinyl chloride, silk, cotton, hemp and rayon.

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