JP2596103B2 - Wool fiber and mixed fiber products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a wool fiber and a mixed fiber thereof, which have significantly improved shrinkage after washing and shrinkage after washing while maintaining the soft feeling of the wool fiber. About the product.

(Prior art) Wool fiber is known to have an extremely high shrinkage after washing, and as an improvement measure it is improved by oxidizing the scale or coating it with a polyamide resin, polyurethane resin or silicone resin. A technology to do this has been proposed.

(Problems to be Solved by the Invention) However, in the conventional technique, it is possible to control generation of momoka during washing caused by the scale of wool fiber, and to control washing shrinkage while maintaining a feeling of excellent flexibility. I couldn't. The generation of peaches and the rough hardening of the hand in such conventional techniques are fatal drawbacks, and such a technique has not yet been put to practical use.

An object of the present invention is to provide a wool fiber having excellent washing form stability and a mixed fiber product thereof, which has significantly improved shrinkage during washing and shrinkage due to washing while maintaining a soft feeling.

(Means for Solving the Problems) The present invention employs the following means to achieve the object. That is, a wool fiber characterized in that a polymer coating made of an acrylic compound containing two or more acrylic groups and a polyalkylene oxide segment at the end is provided on the surface of a wool fiber, In mixed fiber products containing more than 10% by weight, washing shrinkage has a great effect,
For example, in the case of sewn products and the like, the form of the product is destroyed. Improve.

(Action) Wool fiber shrinks due to the behavior of the scale, and shrinkage can be controlled by sealing the movement of the scale. Therefore, processing of coating with a polyamide resin, polyurethane resin, or silicone resin has been conventionally performed. It was what had been. Although shrinkage was suppressed by such processing, the hand became extremely coarse and hard, and there was a drawback that it was not practical for clothing.

In the present invention, a polymer composed of a specific compound is selected in order to control the shrinkage and washing of the wool fiber.

That is, when the wool fibers are coated with a polymer film of an acrylic compound containing two or more acrylic groups and a polyalkylene oxide segment at the terminal, the wool fibers are effectively treated while maintaining a soft feel. It has been found that the behavior of the scale can be sealed.

Examples of such a compound include diacrylate compounds such as polyethylene glycol diacrylate, polyethylene glycol polypropylene glycol dimethacrylate, polyethylene glycol ω- (α, α-dimethacryloxymethyl) acetate ω ′ acrylate, and triacrylate compounds described below. Acrylic compounds such as compounds can be exemplified.

(However, R represents hydrogen or a methyl group, ι = 5 to 50
As is clear from the above specific examples, the acrylic group in the present invention includes a methacryl group, and the acrylic compound of the compound represented by the above chemical formula further includes a tetraacrylate-based compound having a side chain, Acrylic compounds such as pentaacrylate are included. The number of polyalkylene glycol units such as polyethylene glycol is not limited to two, and any number of polyalkylene glycol units may be used.

In order to preferably achieve the effects of the present invention, the acrylic group should be 3
Acrylic compounds having at least one compound are selected. The larger the number of acrylic groups, the more preferable in forming a three-dimensional structure. Particularly preferably, those having 3 to 5 acrylic groups are selected.

Among such acrylic compounds, those in which the effects of the present invention can be stably obtained are non-nitrogen-containing compounds, particularly those compounds which do not contain quaternary nitrogen in the molecule. It is presumed that such a nitrogen-containing compound hardly causes a polymerization reaction in the coexistence of oxygen, and it is difficult to efficiently improve the washing shrinkage and also tends to lack durability.

Examples of the polymerization initiator for such compounds include ammonium persulfate, ammonium tartrate, potassium persulfate, azobisisobutyronitrile, and redox polymerization initiators such as benzoyl peroxide, methyl isobutyl ketone, and cumene hydroperoxide. A suitable radical polymerization initiator is applied.

The acrylic compound is allowed to adhere to wool fibers in an appropriate system such as an aqueous solution (aqueous dispersion) or an organic solvent solution, and reacted at a polymerization initiation temperature. Such a temperature is preferably 80 to 140 ° C. The polymerization is preferably allowed to proceed in the presence of water, and the reaction is carried out in a water-containing atmosphere or in a state where water is present on the fibers in a range that does not cause migration. Preferably, the reaction is carried out with saturated steam.

When a redox-based polymerization initiator is used, the reaction can be further performed at a constant polymerization initiation temperature.

In particular, when the wool fibers are swollen with a solvent constituting the solution of the acrylic compound, the compounds penetrate into the fibers, so that a strong polymer film can be formed.

The method of applying the solution of the acrylic compound may be any method such as a dipping method, a pad method, a spray method, and a printing method (printing).
It is selected in terms of processing cost, adjustment of film thickness, and the like.

The polymer film of the acrylic compound is preferably 0.01 to
Those having a thickness of 10 µ, more preferably 0.1 to 3 µ are excellent in durability, shrinkage suppressing force and feeling.

The wool fiber of the present invention has a fiber shape as shown in FIG. This figure is an enlargement of 5000 times the film formed by the processing liquid No. 1 of Example 1. Comparing this figure with the enlarged view of the untreated wool fiber of FIG. 2, it can be seen that the scale is clearly blocked by the coating.

Various fibers such as natural fibers other than wool fibers, ordinary synthetic fibers, and semi-synthetic fibers can be used as fibers to be mixed with wool fibers in the present invention. In particular, polyester fibers, polyamide fibers, and polyacrylic fibers For example, fibers that are unlikely to shrink by washing are preferably selected.

The mixed form used in the present invention is not particularly limited, but an appropriate mixed form such as combustion, blending, and knitting is applied. Textile products include the above-mentioned thread, sewing, woven fabric, knitted fabric, non-woven fabric, felt, and the like.

Such a mixed fiber product may be manufactured by using a wool fiber in which the acrylic compound polymer film is provided in advance, or may be treated and polymerized with the acrylic compound-containing treatment solution in the state of the mixed fiber product. You may.

 Hereinafter, the present invention will be further described with reference to examples.

(Example) The evaluation method used in the example is described below.

(Washing method) After heating 2 g / water solution of “Super Zab” (manufactured by Kao Soap Co., Ltd.) to 40 ° C., load the sample into a home washing machine,
After 5 cycles of washing for 5 minutes and then washing for 2 minutes in a bath ratio of 1:20, dehydration was performed and the laundry was air-dried.

(Washing Shrinkage) The test pieces washed by the above-described washing method were evaluated by the difference in yarn length before and after washing.

(Dropping rate) The amount of adhesion of the test piece washed by the above-mentioned washing method before and after washing was measured and evaluated.

Example 1 A surge composed of wool fibers (64'S worsted goods) in which the warp and the weft are scoured and dyed by a usual method, and then padded with the following treatment solution. The adhesion amount was 80% by weight.

The pad product was treated under 105 ° C. saturated steam for 3 minutes to be polymerized to form a film having a thickness of 0.2 μm. After the polymerization, it was left in a room at room temperature of 20 ° C. and humidity of 65% for 5 hours.

(Treatment solution 1) A solution obtained by adding 0.3% by weight of ammonium persulfate to a 3% by weight aqueous solution of PEG (polyethylene glycol) diacrylate having a molecular weight of 500.

(Treatment solution 2) A solution obtained by adding 0.3% by weight of ammonium persulfate to a 3% by weight aqueous solution of PEG dimethacrylate having a molecular weight of 1,000.

(Treatment solution 3) A solution obtained by adding 0.3% by weight of ammonium persulfate to a 3% by weight aqueous solution of PEG trimethacrylate having a molecular weight of 1,000.

(Treatment solution 4: Comparative example) A solution obtained by adding 0.3% by weight of ammonium persulfate to a 3% by weight aqueous solution of PEG monomethacrylate having a molecular weight of 1,000.

 Table 1 shows the results of the processing.

As is evident from Table 1, in the case of the monoacrylate compound of the treatment liquid No. 4 of the comparative example, the falling rate and the shrinkage were significantly high, but the examples of the diacrylate compounds of the treatment liquids No. 1 and 2, It can be seen that all of the examples of the triacrylate compound of the treatment liquid No. 4 exhibit excellent performance with low washing shrinkage and falling off rate. In addition, it can be seen that the treatment liquid No. 4 is more excellent in the falling rate than the treatment liquids Nos. 1 and 2. In particular, it can be seen that there is a remarkable difference between the treatment liquids Nos. 1, 2, and 4 and the untreated product.

When plasma treatment was performed on the treated products with the treatment liquids Nos. 1, 2, and 4 under normal conditions (under an Ar atmosphere), all of the above-described characteristics were obtained, which was excellent in roughness and washing contamination with a rough feeling. .

Example 2 After scouring a yarn consisting of wool fiber (64'S worsted product),
Pad the following processing solution and adjust the adhesion amount to 80% by weight.
Wound on a skein. This skein was treated and polymerized under the conditions of Example 1 to form a film having a thickness of 0.2 μm.

(Treatment solution 5) A solution obtained by adding 0.3% by weight of ammonium persulfate to a 3% by weight aqueous solution of PEG dimethacrylate having a molecular weight of 2,000.

This treated wool fiber yarn and polyester fiber yarn (75 denier / 36 filaments) were crossed, and a surge was formed using the inflamed linen yarn.

With respect to this surge, the washing shrinkage and the shedding rate were evaluated. Table 2 shows the evaluation results.

Example 3 A woven fabric composed of a blended yarn 2/36 composed of 50% polyester short fiber and 50% wool fiber was scoured and dyed by a usual method, and then treated liquid No. 3 was padded, and the adhesion amount was 80% by weight. Squeezed.
This fabric was treated under the conditions of Example 1.

 Table 2 shows the evaluation results of the processed product.

The thickness of the polymer coatings of Examples 2 and 3 was
0.2μ.

As shown in Table 2, the mixed fabrics of Examples 2 and 3 exhibited excellent washing shrinkage resistance of about 2% or less even after washing five times, and showed a practical result with a low falling-off rate.

In Examples 2 and 3, when each of the treated products was subjected to plasma treatment under a normal condition (under an Ar atmosphere), the roughness and washing stain resistance were further improved in addition to the above characteristics.

(Effect of the Invention) The present invention provides a wool fiber having excellent washing shrinkage resistance and fir tree resistance while maintaining the flexibility of wool,
In particular, excellent effects are achieved in mixed products with fibers other than wool fibers.

[Brief description of the drawings]

FIG. 1 is a 5000-fold enlarged view (micrograph) showing the fiber shape coated with the wool fiber coating of the present invention, and FIG. 2 is a 5000-fold enlarged view (microscopic view) showing the fiber shape of untreated wool fiber. It is. The line at the lower right of the figure means the dimension (10 μm).

Claims (2)

(57) [Claims] 1. A wool fiber, wherein a polymer coating comprising an acrylic compound containing two or more acrylic groups and a polyalkylene oxide segment at a terminal is provided on the surface of the wool fiber. 2. A mixed product comprising 15% by weight or more of wool fiber, wherein the wool fiber has a polymer coating comprising an acrylic compound having two or more acrylic groups and a polyalkylene oxide segment at the end. A mixed fiber product comprising: