JPS60110944A - Imparting of slub yarn mode to acryl spun yarn by heat treatment and slub-like acryl 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] Technical Field> The present invention relates to acrylic spun yarns (hereinafter referred to as 100% acrylic spun yarns, single yarns, plied yarns, blended yarns of acrylic fibers and other fibers, and these spun yarns and other fibers). A method of significantly changing the form (thick and thin form in I+!j) of the fibers of the above by means of tension and heat, and this method Prior art related to slab-like acrylic spun yarn made using the above method Various decorative yarns have been known from the past. Decorative yarns containing 2-ply yarns made of acrylic spun yarns can be added to slub fiber metal scraps to yarns, or irregular yarns can be made separately and used with other yarns to create decorative yarns (fancy twisting).
st). These conventional methods not only have difficult problems in the way slabs are made or added, but also have various limitations and problems in increasing the fancy effect by twisting decorative threads.

For example, when adding phi'f for 2-p yarn to leg & 2-yarn in 2-p yarn, special equipment is not required, but the work requires considerable skill, and the production is also difficult. It was inefficient. - In the case of manly yarn twisting, separate special equipment is usually required, and there is no suitable method for processing the formed fanci effect to make it more noticeable.

The present inventors have conducted various studies in order to solve the above-mentioned problems of the conventionally known decorative yarn manufacturing methods. In other words, the present invention was achieved by focusing on the fact that acrylic spun yarn can be stretched approximately twice its length by hot stretching. The object of the present invention is to provide a simple and easy method that can significantly change the shape of the yarn, and an acrylic spun yarn between two hollow yarns in which elongated portions and bulky portions are alternately and continuously formed using the method.

<Structure of the Invention> The purpose of the present invention is to alternately apply a constant tension stretching state and a non-stretched state to an acrylic spun yarn, and create a slab light modulation form by processing the acrylic spun yarn under each of the above conditions. This is achieved by a method of imparting this to acrylic spun yarn.

That is, when acrylic spun yarn (referred to as acrylic spun yarn in the present invention) that has not been heat-treated at a temperature near its softening point is softened by exposing it to a heated fluid and then stretched with a constant tension, each fiber At the same time, each fiber is rearranged, and as a result, the overall thickness of the acrylic spun yarn is changed to a side number.

At this time, it is presumed that free hydrogen penetrates and fixes this state. Furthermore, when the acrylic spun yarn in the same state as the softened state described above is placed in a non-tensioned state, that is, in a non-stretched state, and is exposed to the same heated fluid as described above, the acrylic spun yarn undergoes the known shrinkage. This will increase the bulkiness of the yarn. Utilizing the above two phenomena, a slab-based acrylic spun yarn, which is another object of the present invention, has a remarkable change in form (thickness), that is, a plitic elongated portion and a dull bulky portion are alternately and continuously formed. can be obtained.

In the present invention, the critical tension refers to the tensile force at the moment when the acrylic spun yarn breaks when the acrylic spun yarn is gradually stretched.

<Example> Hereinafter, the present invention will be described in detail based on an example of a method of imparting a nub interyarn morphology to an acrylic spun yarn by heat treatment according to the present invention.

First, while applying a constant tension (for example, about 30% of the limit tension) to the acrylic spun yarn, hot water heated to the softening point temperature of the acrylic fiber is injected onto a certain part of the yarn to perform hot stretching. In this case, if the acrylic spun yarn is Regi = -2- yarn, hot stretching is performed on a certain length part, and in the case of fancy yarn, the above-mentioned method is applied to a long and narrow part of Regi yarn where no fancy effect is formed. Perform hot stretching. Next, the same water vapor as above is injected to the next untreated portion following the hot-stretched portion while keeping the yarn in a state of almost no tension.O If the raw acrylic spun yarn is a fancy yarn, a fancy effect is obtained. This tension-free heat treatment is performed on the part where is formed.

By continuously repeating the above-mentioned hot drawing and tensionless heat treatment, in the case of legi-crystalline yarn, elongated bright parts due to hot drawing and thick bulky dull parts due to tensionless heat treatment are continuously alternated. A yarn resembling a kind of woven yarn (in the present invention, this yarn will be referred to as a medium woven yarn of decorative yarn) can be obtained. (See Specific Example 1 below) (In this case, it is effective to use two or more plied yarns or twisted yarns.) In addition, in the case of fancy yarns, part of the regiela has the original thickness. It becomes elongated to about half, but on the other hand, the part with the fancy effect significantly increases its shiparchy compared to the original state, so as a result of both phenomena, the overall shape changes synergistically to a very large extent, and the overall The appearance of the threads began to take on a special and distinctive form with many different undulations.

Several specific examples according to the present invention will be described below.Specific Example 1: Limit tension 460gr+260t, p, m+right twist, 3
93 Two 6S/2 matte acrylic spun yarns in the same direction
A twisted yarn of Regini 2- is prepared by twisting at t, p, and m, and the yarn is first given a tension of 138 g and heated to the softening point temperature of the acrylic fiber, and then sprayed with water vapor heated to the softening point temperature of the acrylic fiber only in a certain part. Hot stretching was carried out until the length was approximately doubled. The temperature of the processing chamber at this time was 200℃, and the vapor pressure was 8-16
kg/i and hot stretching for about 3-5 seconds. Next, the yarn is kept in a nearly tension-free state, and the same water vapor as described above is injected under the same conditions as described above to the untreated portion adjacent to the portion subjected to the hot drawing. As a result, this non-stretched heat-treated portion shrinks and becomes bulky. The volume ratio of the hot-stretched part and the non-stretched heat-treated part made in this way is approximately 1:8.
In contrast, the hot-stretched, fine-grained part produced a prite-like luster, and exhibited a very special nucleation effect.

Specific Example 2 Blended yarn of 70% Niacrylic fiber and 30% wool 60S/
1 (limit tension 150 gr), tension only 50 g
The treatment was carried out under the same conditions as in Example 1 except that the temperature was changed to r. The volume ratio of the hot-stretched part to the non-stretched heat-treated part in the resulting yarn is about 1 = 4, and the former part has a remarkable bright luster, while the latter part has a pronounced dull fringe. Bulky properties and woolly-like effects were obtained. ◎Specific Example 3: A part of a long and thin Ray-2 was hot-stretched to a decorative thread of acrylic fiber such as a known chain yarn or Snovral yarn to form a chain or a horn-like yarn. The section was non-stretch heat treated. (
(This was done in the same manner as in Example 1) As a result, there was a significant difference in the thinness and bulkiness between the leg = -2 part and the fancy effect part, and as a result, the thickness was almost 2 compared to the original state. Appearances that are close to double can give changes in the relief form above.

<Effects of the Invention> Since the method of imparting a double brightness modulation pattern to acrylic spun yarn by heat treatment according to the present invention is configured as described above, by using the method, it is possible to easily and easily apply acrylic spun yarn to acrylic spun yarn. The morphology can be varied significantly with few restrictions.

patent applicant Lee Ying Moxibustion (1 stone of wood) patent application agent Patent Attorney Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Akira Yamaguchi Patent Attorney Masaya Nishiyama

Claims (1)

[Scope of Claims] 1. A slab-light tone acrylic spun yarn in which bright elongated portions and dull bulky portions are alternately and continuously formed, wherein the bright elongated portion holds the acrylic spun yarn under a certain tension. The dull bulky part is made by heating the acrylic spun yarn to a temperature near the softening point of the acrylic fiber under no tension. A slab-light tone acrylic spun yarn characterized by a part made by exposing it to a fluid. 2. The acrylic spun yarn is alternately subjected to a stretched state with constant tension and a non-stretched state with no tension, and the acrylic spun yarn under each of the above conditions is heated to a temperature near the softening point of the acrylic fiber. A method of imparting a slab-based shape to acrylic spun yarn through heat treatment, characterized by 2. 3. Hot drawing f of PM acrylic spun yarn: The method is carried out at a tension of about 30% of the limit tension of the acrylic spun yarn. The method described in iJ4. 4. Claim 2, characterized in that the raw yarn of the acrylic spun yarn is composed of a blended yarn consisting of acrylic fibers and other fibers, or a series of yarns consisting of acrylic spun yarns and other fibers. the method of.