JPH1112945A - Pilling prevention of animal hair fiber and pilling-resistant animal hair fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an animal hair fiber from pilling without impairing its feeling and affecting its dyeability, by treating the animal hair fiber with a water-soluble epoxy compound having two or more epoxy groups in one molecule. SOLUTION: An animal hair fiber such as wool is prevented from pilling by treating it with a water-soluble epoxy compound having two or more epoxy groups in one molecule such as a compound of the formula [R is O-(CH2 CH2 O)n , O-(C6 H4 )-O, etc.; (n) is 1-20], wherein it is preferable to raise temperature while immersing the animal hair fiber in an aqueous solution of the above epoxy compound.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing pilling of animal hair fibers and an animal hair fiber having improved anti-pilling properties.

[0002]

BACKGROUND OF THE INVENTION Pilling is a physical change that occurs when textiles clump together on the outer garment surface, sometimes together with impurities, into small spheres. This lump of fibers is usually called a pill, and is particularly likely to occur in a knitted fabric or the like in which the ends of the fibers are protruding from a plurality of surfaces, and gives an unfavorable appearance to the outer garment. This has been said to be a similar and eternal problem in animal hair fibers typified by wool fibers.
Conventionally, research on this pilling has been performed on the following matters.

(1) Regarding the influence of physical properties of a material on the pilling property of a woven or knitted fabric.

(2) Investigation of chemicals that reduce pilling properties.

(3) Research on various processing steps to reduce pilling properties.

However, pilling, such as fiber strength, bending stiffness, single fiber density, fiber length, number of crimps, number of twists of yarn, length and shortness of fluff, resistance and durability to repeated bending, degree of wear, conditions of dyeing finish, etc. There are too many factors related to this, and there is no uniform view.

Regarding (1), if the number of twists of the yarn is increased, the pill resistance is improved, but if the soft texture is emphasized, the number of twists is limited, and this is a problem particularly in the case of knitting.

[0008] Regarding (3), a general softener such as aminosilicon has poor pilling properties.

Regarding (2), a method using a reducing agent represented by hydroxyalkylphosphine has been proposed. (Japanese Patent Application No. 63-50725, International Application No. P
In this method, cystine bonds in intermolecular molecules in animal hair fibers are cleaved, or tissue denaturation in the cortex of animal hair fibers is encouraged, and the bulges are smooth without feeling. Also tends to disappear, which is not preferable. In addition, since the cystine bond is cleaved and a large number of thiol groups are generated, the dyeing speed is remarkably increased, and there is a disadvantage that uneven dyeing is easily generated.

[0010]

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for preventing pilling of animal hair fibers, which can be treated at any stage of the production of textile products. That is, slivers, yarns, woven fabrics, knitted fabrics can be used in any form, and can be processed with a top dyeing machine, a cascade dyeing machine, a cheese dyeing machine, or an anti-dyeing machine. It is in.

[0011]

According to the present invention, there is provided an animal hair fiber comprising:
The present invention relates to a method for preventing pilling of animal hair fibers treated with a water-soluble epoxy compound having two or more epoxy groups in a molecule, and an animal hair fiber treated in such a manner and having excellent anti-pilling properties.

The garment fiber manufacturing process comprises a multi-step process. When selling at the stage of animal hair fiber fabric yarn,
It is necessary to prevent pilling on raw wool such as sliver, which is a stage prior to yarn formation.

[0013] Also, knitted yarn which becomes a product if knitted must be processed with raw wool or knitted yarn. In this case, in the case of a small lot, it is advantageous to carry out the processing after the yarn is made into a thread state by a casset dyeing machine or a cheese dyeing machine.

Further, in the case of a woven fabric or the like, post-processing (before and after dyeing) with a piece of cloth can be performed.
The present invention can be applied to any of the stages of the raw wool to the woven knitting. That is, it is characterized in that it can be processed by a top dyeing machine, a cheese dyeing machine, a case dyeing machine or an anti-dyeing machine regardless of before or after dyeing.

In the present invention, a water-soluble epoxy compound which reacts with active hydrogen of the fiber is used for processing in a normal processing step.

The anti-pilling effect of the present invention is achieved by forming a crosslink between molecules of animal hair fibers by a water-soluble epoxy compound,
It is thought that the increase in the intermolecular force increases the torsional stiffness of the single fiber, but this is beyond speculation. Further, in the method of the present invention, the pilling can be prevented without damaging the original texture of the animal hair fiber by generating a new cross-linking without cutting the inherent cystine bond of the animal hair fiber. There are features.

The water-soluble epoxy compound used in the present invention has the general formula (1)

[0018]

Embedded image It has a chemical structure exemplified by

Among them, particularly preferred epoxy compounds are
Diglycidyl ether and R are -O- (CH2CH2O) n-
And n = 1 to 5.

Another preferred epoxy compound is

[0021]

Embedded image It has a chemical structure exemplified by

Among them, particularly preferred epoxy compounds are
Glycerol polyglycidyl ether and diglycerol polyglycidyl ether.

However, the water-soluble epoxy compound that can be used in the present invention is not limited to those exemplified above. The molecular weight of the epoxy compound is not particularly limited, but the number of cross-links with the active hydrogen of the animal hair fiber protein reacts in a molar ratio, so that a relatively small one can exhibit the same effect even if the amount used is small. Economically favorable.
That is, epoxy equivalent (WPE: weight per epoxy e)
(quivalent) is preferable. In general, as the molecular weight increases, the melting point increases, and at room temperature, it becomes a gel and becomes difficult to use. For example, in the case of polyethylene glycol diglycidyl ether, the number of chains of ethylene glycol is preferably about 1 to 20.

The cross-linking of animal hair fibers with the water-soluble epoxy compound of the present invention can be carried out without any problem by various known methods.

Proteins contain a large number of amino groups and carboxyl groups, their active hydrogens are relatively easy to react with water-soluble epoxy compounds, and a crosslinking reaction can be easily obtained.

When processing in a batch process using a dyeing machine, the reaction may be carried out with an alkaline agent such as sodium carbonate under a weak alkaline condition of about pH 9, and a known catalyst such as a neutral salt may be used if necessary. You may. (Japanese Unexamined Patent Publication No.
231079) There is no significant difference in the dyeability after the cross-linking treatment as compared with the untreated dyeing.

The amount of the epoxy compound necessary for preventing the pilling of the animal hair fiber cannot be specified unconditionally depending on the molecular weight and the properties of the yarn, woven fabric and knitted fabric composed of the animal hair fiber. The epoxy compound is used in an amount of 0.066 mol or more, preferably 0.066 to 0.58 mol, in consideration of the epoxy equivalent per 100 g. For example, when treating knitted animal hair fibers using "Denacol EX-850" (ethylene polyethylene glycol diglycidyl ether, n = 2, WPE = 121) (epoxy compound manufactured by Nagase Kasei Kogyo Co., Ltd.), Denacol EX-
850 may be used by 8% owf or more. Further, the animal hair fiber treated in the present invention means not only a fiber in the state of a thread but also a fiber processed product such as a woven fabric, a knitted fabric, and a sliver, and a processed intermediate product.

Example 1 A sliver was prepared by conventional merino washing, carding and top processes using Merino wool fiber having an average fiber diameter of 21.7 μm and an average fiber length of 80 mm. 1.0 kg of sliver was charged to the top dyeing machine and washed in a conventional manner using an aqueous nonionic surfactant solution. After reconstitution, water was added so that the bath ratio became 1:13, and the epoxy compound "Denacol EX-
810 "(ethylene glycol diglycidyl ether,
n = 1, WPE = 112) (manufactured by Nagase Kasei Kogyo Co., Ltd.) so as to have a 25% owf to start the anti-pilling treatment. After maintaining at room temperature for 10 minutes, the temperature was raised at a rate of 2 ° C./min to reach 80 ° C. P of the aqueous solution at that time
H was 7.1, and sodium carbonate was added to adjust the pH to 9.0 for pH adjustment. After holding at 80 ° C for 90 minutes,
After washing with water, soaping and neutralization with acetic acid, the anti-pilling treatment was completed.

The sliver was dried, and a 2/48 (primary twist; Z520, upper twist; S260) knitted yarn was produced by a conventional spinning process. The produced yarn was cut into a scallop and dyed by a conventional method using a 1% owf "Lanaset Gray G" (manufactured by Ciba Geigy) as a dye in a scalpel dyeing machine.
WS test method no. 169 cover factor 0.41
The circular knitted fabric of the India sheeting structure was created.

Example 2 Using the same sliver as in Example 1, washing and refining in the same manner, water was added so that the bath ratio was 1:13, and the epoxy compound "Denacol EX-851 (ethylene Glycol diglycidyl ether, n = 2, WPE = 1
54) (Nagase Kasei Kogyo Co., Ltd.) was added to a concentration of 35% owf, the mixture was kept at room temperature for 5 minutes, and sodium chloride was added to a concentration of 40% owf to start the anti-pilling treatment. After maintaining at room temperature for 10 minutes, the temperature was raised at a rate of 2 ° C./min to reach 80 ° C. PH of aqueous solution at that time
Was 8.8 and kept at 80 ° C. for 90 minutes without pH adjustment. Thereafter, a circular knitted fabric was created in the same manner as in Example 1.

Example 3 Sliver No. 1 was prepared from merino wool fibers having an average fiber diameter of 23.8 μm and an average fiber length of 84 mm by a conventional hair dyeing, carding and topping process.

Average fiber diameter 26.0 μm, average fiber length 8
Sliver No. 2 was prepared using the same process as sliver No. 1 using 9 mm mohair fiber.

80% sliver No. 1 and sliver N
o2 at a ratio of 20% by conventional blending and spinning processes
A knitting yarn of 32 (primary twist; Z400, upper twist; S180) was manufactured. The manufactured yarn was formed into a scallop shape, dyed by a scalpel dyeing machine in the same manner as in Example 1, then washed with water by the same scalpel dyeing machine, and subjected to the following anti-pilling treatment.

Water was added at a bath ratio of 1:10, and the epoxy compound “Denacol EX-821” (ethylene polyethylene glycol diglycidyl ether, n =
About 4 WPE = 195) (manufactured by Nagase Kasei Kogyo Co., Ltd.) was added to a concentration of 50% owf, and after keeping at room temperature for 5 minutes, sodium chloride was added to a concentration of 40% owf to start anti-pilling treatment. did. After holding at room temperature for 10 minutes, the temperature was raised at a rate of 2 ° C./min to reach 90 ° C.
The pH of the aqueous solution at that time was 8.6, and the solution was kept at 90 ° C. for 60 minutes without adjusting the pH, washed with water, soaped, and neutralized with acetic acid to complete the anti-pilling treatment. A circular knitted fabric was prepared from the treated yarn in the same manner as in Example 1.

Example 4 Using a Merino wool fiber having an average fiber diameter of 23.7 μm and an average fiber length of 80 mm, a worsted yarn of 2/32 (primary twist; Z470, upper twist; S230) was produced by a conventional spinning process.
A wool woven fabric having a twill structure of 3/1, a density of 12.5 / 4 = inch per inch, and a driving count of 40 was obtained from the worsted yarn. This was rope-washed, boiled and dried in the usual manner, and then subjected to the following anti-pilling treatment.

Water was added to 20 kg of this wool fabric using a jet dyeing machine so that the bath ratio was 1:10, and the epoxy compound "Denacol EX-810" (ethylene glycol diglycidyl ether, n = 1, (WPE = 112)
(Manufactured by Nagase Kasei Kogyo Co., Ltd.) to a 40% owf, and the mixture was kept at room temperature for 5 minutes.
After adding at 0% owf and maintaining at room temperature for 10 minutes, the temperature was raised at a rate of 2 ° C./min to reach 90 ° C.
The pH of the aqueous solution at that time was 8.9, and the mixture was kept at 90 ° C. for 60 minutes without pH adjustment, washed with water and neutralized with acetic acid to complete the anti-pilling treatment. Thereafter, the product was dyed and finished by a conventional method using 1% owf of "Lanasol Blue 3R" (manufactured by Ciba Geigy) as a dye in the same jet dyeing machine to obtain a product.

Comparative Example 1 A circular knitted fabric was prepared in the same manner as in Example 1 except that the anti-pilling treatment was not performed.

Comparative Example 2 A circular knitted fabric was prepared in the same manner as in Example 3 except that the pilling prevention treatment was not performed.

Comparative Example 3 A fabric was prepared in the same manner as in Example 4 except that the pilling prevention treatment was not performed.

Pilling Test Results The products obtained in Examples 1-4 and Comparative Examples 1-3 were subjected to a pilling test, and the following results were obtained.

The products obtained in Examples 1 to 4 and Comparative Examples 1 to 3 were subjected to a pilling test according to the JIS L-1076A method.

The results obtained after 5 hours were as follows.

[0043]

[Table 1] The results obtained after 10 hours were as follows.

[0044]

[Table 2] In each of the examples, the evaluation of the pilling test was high, and in the comparative example, the evaluation was low.

Dyeability Evaluation Results All the products treated in Examples 1 to 4 were dyed well without any trouble such as uneven dyeing, and there was almost no significant difference in the dyeability (color) from the corresponding Comparative Example. I was not able to admit.

[0046]

The method of the present invention can considerably suppress the occurrence of pilling of animal hair fibers, does not adversely affect the dyeing properties, and can be employed at any position in a general dyeing and organizing process.

Claims (4)

[Claims] 1. A method for preventing pilling of animal hair fibers, wherein the animal hair fibers are treated with a water-soluble epoxy compound having two or more epoxy groups in one molecule. 2. The method according to claim 1, wherein the water-soluble epoxy compound has the general formula (1): The method for preventing pilling of animal hair fibers according to claim 1, wherein the method is a mixture of one or two or more selected from the compounds represented by the following formulae. 3. The temperature is raised while immersing animal hair fibers in an aqueous solution of a water-soluble epoxy compound.
To prevent pilling of animal hair fibers. 4. An anti-pilling animal hair fiber treated by the method according to claim 1.