JPH0241430A - Production of darning thread for fixing edge fray of knit product - Google Patents

Abstract

PURPOSE:To obtain the subject darning thread free from hardening even after the thermal welding treatment by twisting a fiber bundle around a heat- shrinkable yarn, untwisting the obtained yarn in the untwisting direction and twisting a heat-weldable yarn around the obtained expanded yarn. CONSTITUTION:A heat-shrinkable yarn 11 such as spandex yarn is used as the core yarn. A core spun yarn 1 produced by twisting short fibers 12 around the outer circumference of the core yarn is untwisted in the untwisting direction. A heat-weldable yarn 2 is twisted simultaneous to the untwisting operation to obtain the objective darning thread. When the thread is heated at a temperature to cause the shrinkage of the core-spun yarn 1 without melting the yarn, the thread keeps the soft state even after the heat-welding treatment.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for producing a darning thread for preventing fraying at the edges of knit products such as gloves and sweaters.

<Prior Art> Due to the structure of knit products, it is necessary to prevent fraying at the last part after knitting.

For this purpose, as shown in Fig. 3, a thread a that shrinks with heat, an intermediate thread b1 that is wound to protect it and give the same thickness as the knitted fabric, and a thread that fuses with heat. A darning yarn made by twisting C together has been developed.

According to this structure, by heating the yarn C that is thermally fused after knitting is completed, shrinkage and fusion are performed simultaneously, thereby preventing the stitches at the ends of the knitted fabric from coming undone.

<Problems with the Prior Art> When the ends are treated with such conventional darning threads, a normal thread is wound as an intermediate thread under the heat-fused thread.

Therefore, the fused portion becomes hard and remains at the outermost part of the darning thread, and also impregnates the intermediate thread, making the whole hard, so that it comes into contact with the user's skin when putting on or taking off clothes.

For this reason, for example, gloves may come into contact with the wrist repeatedly during work, causing discomfort, or in some cases may damage the skin, making them unusable.

This phenomenon was not limited to gloves, but also occurred in other products such as sweaters.

<Object of the present invention> The present invention has been made to improve the above-mentioned drawbacks, and in the treatment of the ends of knitted products such as gloves and sweaters, the entire intermediate yarn remains intact even after heat-fusion treatment. To provide a method for manufacturing a darning thread that is not hard and does not injure the user's skin or cause discomfort when wearing or taking off clothes.

<Structure of the present invention> Next, the structure of one embodiment of the darning thread of the present invention will be described.

<A> Construction of the darning thread The darning thread of the present invention is composed of a core spun thread 1 and a heat-fusible thread 2 wound around the outer periphery of the core spun thread 1.

<Explanation> Core spun yarn The core spun yarn 1 is a well-known type, for example, a heat-shrinkable yarn 11 such as a spandex yarn is used as a core, and short fibers 12 are twisted around the outer periphery.

(ku) Production of Darning Yarn A core spun yarn 1 having a spandex core is prepared, and it is untwisted in the untwisting direction.

At the time of untwisting, the heat-fusible yarns 2 are twisted together at the same time.

Through this operation, the darning thread of the present invention is completed.

Therefore, the heat-fusible yarn 2 is covered on the outside of the core spun yarn 1 made of spandex.

Specifically, it is possible to adopt a method in which various core spun yarns 1, each of which has already been twisted individually, are twisted in the opposite direction, and at the same time, the heat-fusible yarn 2 is inserted.

〉Heating A temperature within a certain range is applied to the darning thread having the above structure.

The degree of heating is such that the heat-fusible yarn 2 melts, and the core spun yarn 1 only contracts but does not melt.

It is formed.

Therefore, the heat-sealing yarn does not penetrate, and the entire system remains soft even after heat-sealing.

Therefore, even after melting and adhesion, the product has an excellent soft feel and is able to obtain a knitted product that feels good on the skin.

[Brief explanation of the drawing]

Fig. 1 2 An explanatory diagram showing the structure of the darning thread of the present invention Fig. 2:
Its cross-sectional view Figure 3: Explanatory diagram of the structure of the conventional darning yarn <Effects of the present invention><A> The core spun yarn 1 shrinks due to heating, the heat-fusible yarn melts, and is fused only to the surface of the core-spun yarn. As a result, the chances of adhesion with the yarns of adjacent knitted fabrics increase and they are not easily disassembled.

Claims (1)

[Claims] (1) Using a yarn with fiber bundles twisted around a heat-shrinkable yarn, untwist the yarn in the untwisting direction, untwist it, expand the fiber bundle, and heat-seal it to the outer periphery of the yarn. A method for producing a darning yarn for preventing fraying at the edges of knitted products, which involves twisting yarns together and then heating at a temperature within a range where the heat-fusible yarn melts and the heat-shrinkable yarn only shrinks but does not melt.