JPS62177247A - Wool spun yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a wool spun yarn with high bulk.

(Prior art) Currently, worsted yarn of 100 cm of wool fiber has a hot water shrinkage rate of 2 to 2.
The fabric using this worsted yarn was poor in bulk. Worsted yarn made of 100% wool fiber has a soft and warm feel. However, in recent years,
Bulky yarns of wool fibers have also been required.

In response to such demands, various means have been considered to increase the bulk. This method can be roughly divided into two types.

The first method is to select wool fibers that have a particularly large number of crimps and use them to make a spun yarn. However, by this means, only a hot water shrinkage rate of less than 7% was obtained, and the bulk was therefore low.

The second method is to increase the crimp using special processing methods. This method can be further divided into three parts.

The first method is to apply elongation strain to the wool fibers by pulling the fibers using an Ia mechanical method, and then cause contraction by hot water. However, even with this method, the hydrothermal 1 ratio was less than 10%, and the process was highly variable, making it an insufficient method.

Second, the wool fiber spun yarn is strongly twisted to fix this twist,
This is a method of imparting a crimp due to the setting effect by untwisting the yarn. Even with this method, only a hot water shrinkage rate of 10% or less can be obtained. Third, after wetting the wool fibers with an aqueous solution of an organic reducing agent, the fibers are stretched and immediately relaxed to induce a shrinkage rate difference between the ortho and bulk cortex within the wool fibers, thereby imparting crimps. Next is a method of giving stuffing crimp. However, even with this method, only a product with a hot water shrinkage rate of 10% or less can be obtained, and although the bulk is high to some extent in the case of extremely thick yarns, there is a drawback that the bulk becomes low as the yarn becomes thinner.

Further, the second means both require special dedicated equipment and are expensive in terms of cost.

(Problems to be Solved by the Invention) An object of the present invention is to provide a wool spun yarn that is extremely bulky, unlike conventional wool spun yarns.

(Means for Solving the Problems) The present invention employs the following configuration to achieve the above object. In other words, the present invention consists of wool fibers of 20 to 50 weights with an alkali solubility of 80% or more and animal fibers of 50 to 80 weights with a low alkali solubility, and the Young's modulus of the yarn after hot water treatment is equal to that of normal wool. It is a wool spun yarn characterized by being 1/4 to 1/2 times as thick as that of a spun yarn.

The present invention will be explained in detail below. Wool fibers with high alkali solubility have disulfide bonds or hydrogen bonds destroyed, and therefore, a phenomenon called hypershrinkage occurs when treated with hot water.

Here, hypershrinkage refers to shrinkage that occurs when unstretched fibers are subjected to a certain chemical treatment. Therefore, 1 the present invention has been developed by blending wool fibers exhibiting a predetermined high alkali solubility with animal fibers such as wool fibers having a lower alkali solubility than the wool fibers. By utilizing the sag of the yarn, the synergistic effect with crimp due to the shrinkage difference between the ortho and para cortices, and by lowering the Young's modulus after hot water treatment than that of ordinary wool spun yarn, we can add bulk to the yarn. It is something that we try to give. In the present invention, the material is treated in 100 g of Al's sodium hydroxide solution at 65° C. for 1 hour, and the weight before treatment is Wl, and the weight after treatment is Wl. Wool fibers with an alkali solubility of 80% or more were selected in order to obtain sufficient bulk through hot water treatment;
The reason why the content is 20% by weight or more is to create bulk when combined with wool fibers having low alkali solubility. On the other hand, the reason why the content is 50% by weight or less is that if the content exceeds 50% by weight, the yarn strength becomes too low and practical performance is impaired.
It consists of wool fibers with a molecular weight of 20 to 50 wt.
/4 to 1/2 times.

Animal fibers with low alkali solubility are used.

This is because it takes advantage of the low shrinkage rate caused by hot water treatment and combines it with a material that has a high shrinkage rate to make it bulky. Examples of animal fibers include wool fibers (alkali solubility: 10 to 1/1)
%), wool fibers that have undergone treatments such as shrink-proofing (alkali-dissolved ff1o to 30%), and the like. Here, the alkali solubility of animal fibers with low alkali solubility is 30 degrees or less.

The wool spun yarn thus obtained exhibits an alkali solubility of 25 to 60 inches, preferably 30 to 55 degrees, in the double yarn state and before bulkiness is developed.

Further, the hot water shrinkage rate measured by treatment at 100° C. for 20 minutes is 13 to 30 qIb, preferably 13 to 20 S. In addition, the wool spun yarn of the present invention has a Young's modulus of about 1/4 to 1/2 after hot water treatment (100°C, 20 minutes) at the same first point and the same number of twists as compared to ordinary wool yarn.
Twice as low and therefore more likely to become bulky v
tt''.

By the way, to explain the manufacturing method of the woolen spun yarn of the present invention,
First, ordinary wool fibers are processed into slivers or raw cotton using chemicals that break disulfide bonds or hydrogen bonds, such as performic acid.
After treatment with peracetic acid, the treated wool fibers are then mixed in the form of slivers or raw cotton with conventional untreated wool fibers and passed through conventional wool processes to form woolen yarns. This woolen yarn.

When yarn or fabric is treated with hot water in a rough manner, it exhibits high bulk.

(Example) Example 1 Merittsubu was dyed in a top dyeing machine at a bath ratio of 1:15 (H3C
It was treated with a solution of 8% OOOHO at room temperature for 1 hour, washed with water, and then dried. This treated wool fiber has an alkali solubility of 8
It showed 5%. This treated wool fiber and untreated wool fiber (alkali solubility 14%) were mixed in the proportions shown in Table 1 and passed through a normal combing process.

Next, it is passed through a high-speed bobbiner at Gill 3 Mill, and made into roving.
It is spun into a worsted yarn with a twist count of 335T/M and 1/32nd yarn (meter system), and is made into a worsted yarn with a twist count of 185T/M after spinning.
/Manufactured No. 32 (metric system). This 2732
A 7-gauge rubber knitted fabric was knitted using two-stranded yarns, and the physical properties of the two-sided yarns before the appearance of the 90-year high were found. Et- was measured and shown in the same table. The measurement method was as shown below. Note that the alkali solubility was determined by the method described above.

Using a repeating machine with a hot water shrinkage rate frame circumference of 1 m, samples are taken as many times as the number of single yarn equivalent counts. Support one end of the sample and apply a load of 50 f to the lower end to measure the inner length of the bulge (this is defined as L). Place the sample in a gauze bag, fill a beaker with water 100 times the weight of the sample, bring to a boil, place the sample in the gauze and keep boiling for 20 minutes, then remove the beaker from the heater and cool the beaker together. . Dehydrate the sample and air dry. After air-drying, the final length is measured in the same manner as the first total length measurement (this length is referred to as tl-L').

Calculate the hot water shrinkage rate using the following formula.

The load-elongation curve is plotted using a Muyoung's modulus constant-speed extension type tensile tester, and the initial tensile resistance is calculated by multiplying the specific gravity.

Young's modulus (kf/d) - Initial tensile resistance x 9 x specific gravity Altitude Knitted fabric C in a state of moisture equilibrium? ) is measured and expressed in unit area, per product (f/m), and this is defined as tw. At five or more locations on the knitted fabric, the thickness (fl) is measured using a thickness measuring device (dial gauge method) under an initial load of 7 f/- for about 10 seconds, and this is designated as T. Calculate the bulk height using the following formula.

Bulky H (crA/l) = -x 101 thickness Use the thickness used to measure bulk.

As is clear from Table 1, Black 1, which does not contain treated wool fibers, had high yarn strength but low bulk and was somewhat lacking in softness in terms of texture. Washing 2 had less treated wool fibers, so the bulk was one level lower. black 3~6
1 is related to the present invention, is bulky, and is '! The yarn strength also satisfies practical performance, and the Young's modulus after hot water treatment is higher than that of ordinary wool spun yarn.The wool spun yarn of the present invention has a significantly higher hot water shrinkage rate than conventional wool spun yarn. Show.

Furthermore, it exhibited a high bulkiness after the bulkiness was developed, and also had sufficient practical performance in terms of yarn strength.

Claims (1)

[Claims] 20-50% by weight of wool fiber with alkali solubility of 80% or more
and 50 to 80% by weight of animal fibers with low alkali solubility, and the Young's modulus of the yarn after hot water treatment is 1/4 to 1/2 times that of ordinary spun wool yarn. Wool spun yarn.