JPH076136B2 - Water repellent treatment method for animal hair fibers - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a novel processing method for imparting excellent durability and water repellency to animal hair fibers by an exhaust treatment method.

(Prior Art) In general, thread-like materials such as wool fibers made of animal hair fibers, sweaters, knitted products, and products sewn with woven fabrics are treated with water-repellent treatment, when an aqueous dispersion of these fluorine-based water-repellent agents A method of immersing in a water repellent and exhausting the water repellent is conventionally known. According to this conventional method, the initial water repellent performance is relatively excellent by devising the type of water repellent and the treatment conditions, but it is not sufficient as far as the durability of the water repellent is concerned. ， The water repellency is easily deteriorated by washing. Further, when water-repellent treatment is carried out using shrink-proofed wool, the above method is insufficient in water-repellent performance even in the initial stage. Although a treatment with a silicon-based water repellent mainly containing siloxane is also performed, in this case, the water repellent performance itself is inferior to that of the fluorine-based water repellent treatment.

(Problems to be Solved by the Invention) The present invention has been made in view of the above circumstances, and an object thereof is to impart water repellency excellent in durability by an exhaustion method of animal hair fibers. To do.

(Means for Solving Problems) In order to achieve the above-mentioned object, the present invention has the following configuration.

That is, the present invention provides animal hair fibers with a molecular weight of 1,000 to 50,000.
0.01% by weight or more of polyethyleneimine is added, and then the water repellent is exhausted with an aqueous dispersion of a fluorine-based water repellent. is there.

Hereinafter, the present invention will be described in detail.

In the method of the present invention, in order to impart excellent durability and water repellency to the animal hair fiber, the animal hair fiber has a molecular weight of 1,000 to 50,000 in advance.
0.01% by weight or more of polyethyleneimine is added.

Animal hair here means natural keratinous fibers obtained from animals such as wool, camels, goats, and rabbits, and also includes blended products of animal hair fibers and other fibers. Shall be provided.

The molecular weight of polyethyleneimine used in the present invention is 1,000 to
A range of 50,000 is available. Molecular weight 1,000
If it is less than or equal to 50,000 or more, the effect of improving the water-repellent performance by the treatment with a fluorine-based water-repellent agent described later is poor.

The treatment temperature is 80 ~, considering the exhaustion rate of polyethyleneimine.
The temperature is good at 100 ° C, and the exhaustion rate becomes almost equilibrium after about 20 minutes of treatment.

The applied amount is preferably 0.01% by weight or more with respect to the fiber,
If less than 0.01% by weight, the effect is poor. The upper limit of the applied amount is about 2% by weight, and even if it is used in a larger amount, the effect is not significantly improved, and the texture becomes coarse and hard, which is not preferable.

Since the exhaustion rate of polyethyleneimine into animal hair fiber depends on the treatment temperature, treatment time, bath ratio, molecular weight of polyethyleneimine, the amount used, etc., it is necessary to set the conditions by experiments in advance. Good.

The animal hair fiber treated with exhaustion of polyethyleneimine is washed with water to remove unbound polyethyleneimine, and then immersed in an aqueous dispersion to perform the exhaustion treatment of the water repellent. The fluorine-based water repellent composed of an organic fluorine-based compound is preferably added to the fiber in a solid content of about 1 to 20% by weight from the viewpoint of water repellency and texture. The treatment temperature is preferably in the range of 20 to 80 ° C. If it is less than 20 ° C, the exhaustion is low, and if it exceeds 80 ° C, the water dispersibility often becomes unstable, which is not preferable.

Animal hair fibers that have been exhausted with a fluorine-based water repellent are dehydrated, dried, and then heat-treated to fix the fluororesin. The heat treatment at this time is preferably performed in the range of 120 to 170 ° C. Water repellency can be imparted only by drying, but the durability of water repellency is greatly improved by heat treatment.

(Working) It is not clear why the animal hair fiber is pretreated with polyethyleneimine and then treated with a fluorine-based water repellent to improve the durability of the water repellent treatment effect. Speculates as follows.

When animal hair fibers are treated with polyethyleneimine, polyethyleneimine, which has a high molecular weight, has a low diffusibility inside the animal hair fibers, so that a polymer layer is formed in a limited state on the surface of the fibers and some amines Toughness becomes a polymer by forming a covalent bond with the carboxyl group of animal hair fiber,
When the fluorine-based water repellent is treated in such a state, a continuous film with excellent uniformity of the fluorine-based resin is formed on the polyethyleneimine polymer layer, and as a result, water-repellent performance with excellent durability is formed. Is supposed to be given.

(Examples) Next, the method of the present invention will be described in more detail by way of examples. The performance and measurement of the performance of the fabrics in the examples were carried out by the following methods.

(1) Water repellency: JIS L-1096 (Spraying method) Example 1 Prepare a rugged hand-knitted yarn 4/16'S and use an injection dyeing machine to use Epomin SP-200 (polyethyleneimine, molecular weight). Ten,
000, Nippon Shokubai Kagaku Kogyo Co., Ltd. 0.3owf was used, and the treatment was performed at 90 ° C for 20 minutes at a bath ratio of 1:20. Then, after thoroughly washing with water, 15% owf of Asahi Guard AG-710 (fluorine-based water repellent, manufactured by Meisei Chemical Industry Co., Ltd.) was used and treated at 60 ° C. for 60 minutes.

Then, after dehydration and drying by a usual method, heat treatment was carried out at 125 ° C. for 20 minutes to obtain a water-repellent treated yarn according to the method of the present invention.

For comparison with the method of the present invention, epomin is used in this example.
A water repellent treated yarn of Comparative Example 1 was obtained by the same method as in this example except that the treatment with SP-200 (polyethyleneimine) was omitted.

Using the water-repellent treated wool yarns thus obtained according to the method of the present invention and Comparative Example 1, 43 knits / c were obtained on a flat knitting machine.
A knitted fabric of m, 45 steps / cm was formed and subjected to a water repellency test. The results are shown in Table 1.

As is clear from Table 1, the method of the present invention has surprisingly improved durability of water repellency as compared with Comparative Example 1.

Example 2 Using the untreated wool yarn used in Example 1, a structure similar to that of the knitted fabric in the water repellent test of Example 1 was knitted in advance,
This was used as a sample to be treated. Epomin SP-300 was loaded with the above sample to be treated using an Overmeier type dyeing machine.
(Polyethyleneimine, molecular weight 30,000, manufactured by Nippon Shokubai Kagaku Kogyo Co., Ltd.) was used at 0.15% owf in a bath ratio of 1:15 at 95 ° C. for 40 minutes. After thorough washing with water, Rikenparan FGX-10 (fluorine-based water repellent, manufactured by Miki Riken Co., Ltd.) was used at 10% owf for treatment at 50 ° C for 60 minutes.

Then, after dehydration and drying by a usual method, heat treatment was carried out at 140 ° C. for 5 minutes to obtain a water-repellent treated yarn by the method of the present invention.

For comparison with the method of the present invention, epomin is used in this example.
A water repellent treated cloth of Comparative Example 2 was obtained by the completely same method as this Example except that the treatment with SP-300 (polyethyleneimine) was omitted.

The water repellent performance of the obtained water repellent treated fabrics of the present invention and Comparative Example 2 was measured, and the results are shown in Table 2.

As is clear from Table 2, the method of the present invention has surprisingly improved durability of water repellency as compared with Comparative Example 2.

(Effects of the Invention) The present invention has a constitution in which polyethyleneimine is applied to animal hair fibers and then treated with a fluorine-based water repellent by an exhaust method. According to the method of the present invention having such a constitution, It is possible to impart surprisingly excellent water repellency to the hair fiber.

Claims (1)

[Claims] 1. A beast characterized by imparting 0.01% by weight or more of polyethyleneimine having a molecular weight of 1,000 to 50,000 to animal hair fibers, and then exhausting the water repellent with an aqueous dispersion of a fluorine-based water repellent. Water repellent treatment method for hair fibers.