JPS6329023B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a knitted fabric with good water absorption.

(Prior art) Conventional methods for imparting water absorbency to knitted fabrics include: using fibers with water absorption properties; imparting water absorption properties to fibers through chemical post-processing; and creating micropores in fibers physically and chemically. , which have been developed and used, however, they have not been fully satisfactory due to problems in the comfort of wearing, quick-drying properties, durability against washing, etc.

On the other hand, efforts were made to use false-twisted fused yarns in knitted fabrics to minimize the slimy and waxy feel characteristic of synthetic fibers and to bring the texture closer to that of natural fibers. No. 111073 proposes a cross-knitted fabric using fused yarn. Although this interwoven fabric was given a crisp feel suitable for the season, it had almost no effect on the essential water absorbency.

(Objective of the Invention) An object of the present invention is to improve the above-mentioned drawbacks and provide a knitted fabric having a cotton-like feel, excellent water absorbency and quick drying properties.

(Structure of the Invention) That is, in the present invention, the back side of a knitted fabric having a front-back structure is constituted by a composite three-layer structure yarn, and as the composite three-layer structure yarn, a single yarn fineness of 2 de or less,
A false twisted composite yarn in which sheath yarns made of ultra-fine multifilaments with a filament count of 40 or more are wound in an alternating twist pattern with a yarn length difference of 15% or more,
The water absorbent knitted fabric is characterized in that a part of the sheath yarn multifilament is at least partially fixed at the winding interface by fusing the core yarn.

The present invention will be explained in detail below.

The knitted fabric of the present invention may be of any structure as long as the material of the front knitted surface and the back knitted surface can be changed, but it is a so-called knotted reversible fabric in which an intermediate layer is formed by tuck knitting between the front knitted surface and the back knitted surface. Organization is preferred.

Further, the yarns of the front knitted surface and the middle layer are not particularly limited and can be freely selected depending on the required characteristics of the intended knitted fabric.

The knitted fabric of the present invention has a front and back structure, but the back side of the knitted fabric must be composed of composite three-layer structured yarn.

The composite three-layer structured yarn in the present invention is a false twisted composite yarn in which a sheath yarn made of multifilament yarn is wound around a core yarn with a yarn length difference (yarn length difference) of 15% or more. At that time, a part of the filament yarns constituting the sheath yarn is wound around the core yarn in an alternately twisted manner in a substantially bundled state, and the winding interface is at least partially fixed by fusion of the core yarn, On the other hand, the remaining filament yarns are individually separated and wound in a crimped state. The core yarn needs to be a fiber with a lower melting point than the sheath yarn, and preferably has a single yarn fineness greater than that of the sheath yarn, that is, the single yarn fineness exceeds 2 de.

Such a false-twisted composite yarn has a heat-fusion temperature higher than that of the thermoplastic synthetic fiber, and has a thickness of approximately 2 de or less, around the thermoplastic synthetic fiber (core yarn) that is being false-twisted. A multifilament yarn (sheath yarn) consisting of 40 or more ultra-fine single fibers is simultaneously false-twisted and wound under overfeed, and in this state, the yarns that essentially form the core are fused. ,
At the same time, by fusing the core yarn, at least a part of the sheath yarn that is in contact with the core yarn at the interface is fixed and heat-fixed, and after untwisting, both yarns are wound without separating. .

In order to effectively demonstrate the characteristics of the yarn used in the knitted fabric of the present invention, from the viewpoint of forming a sheath yarn structure, there must be a yarn length difference of 15% or more between the core yarn and sheath yarn of the false twisted composite yarn. A more preferable texture and appearance can be obtained when the difference in yarn length is 25% or more. When the yarn length difference is 40 to 70%, there is some excess yarn length and fine noils (uneven thickness), but it has a natural cotton appearance, which is preferable. However, if it exceeds 70%, there will be obvious netsubs and subslaves, and there is a risk that it will become fanciful.

Next, to explain the present invention in more detail with reference to the drawings, Fig. 1 is a model diagram of a typical side structure of the composite three-layer structure yarn used in the present invention, and Fig. 2 is a model diagram of a typical side structure of the composite three-layer structure yarn used in the present invention. FIG. 3 is a model diagram of a cross-sectional structure. In the figure, the core yarn 1 does not have the elasticity to be fused and the part 2 of the sheath yarn is at least partially fixed at the interface with the core yarn due to the fusion of the core yarn, and moreover, in the S direction and Z direction. It is said that the filament yarns 3 are wound continuously with the winding direction reversed even at a winding angle of 360 degrees or less, and the remaining filament yarns 3 of the sheath yarn are individually separated and wound in a crimped state. Those having a unique structure are best exemplified.

(Action of the invention) The knitted fabric of the present invention has a front and back structure, and the back side is composed of a composite three-layer structure yarn having the above-mentioned structure, so it has excellent water absorbency and This is a new knitted fabric that dries quickly and has a cotton-like texture due to partial fusion.

That is, the composite three-layer structure yarn used in the knitted fabric is
The sheath yarn is an ultra-fine multifilament with a fineness of 2de or less and a filament count of 40 or more, and has a structure in which it is wound in an alternating twist pattern with a yarn length difference of 15% or more, so it has sufficient bulk. The knitted fabric using such a yarn exhibits excellent water absorption performance in conjunction with the use of ultra-fine fibers, and the core, which is firm due to the fusion of the composite three-layer structure yarn, absorbs water when dry. It prevents moisture from penetrating and is effective in releasing water, so it has the characteristics of both water absorption and quick drying. In order to increase water absorption, it is sufficient to increase the water retention capacity.For this purpose, it is preferable that the single yarn denier of the sheath yarn is thinner.If the single yarn denier is less than 1 denier, excellent performance will be exhibited, but if the single yarn denier is Since it is thin in this manner and has the partially fused portions as described above, it can have a cotton-like feel and feel. In addition, by using a low melting point fiber as the core yarn of the composite three-layer structure yarn and making the single fiber fineness larger than that of the sheath yarn, the form of the composite three-layer structure yarn can be stably maintained,
It is possible to prevent a decrease in water retention due to morphological changes such as sagging during wearing of clothing using the knitted fabric of the present invention.

The front material is essential to cover the functionality of the product, such as surface touch, texture as a knitted fabric, and stretch, and can be selected as appropriate depending on the use of the product.

(Example) FIG. 3 is a knitting diagram of a knitted fabric showing an embodiment of the present invention.

In the knitting diagram shown in Figure 3, the front side knitting yarn 1
A polyester processed yarn of 150 denier was used as the intermediate tack knitting yarn 2, a polyester 100 denier yarn was used as the back side knitting yarn 3, and the following three-layer structured yarn was used as the back side knitting yarn 3. That is, highly oriented undrawn yarn of polyethylene terephthalate 115 de, 36 fil (spinning speed 3200 m/min)
was used as the core yarn, and on the other hand, polyester filament yarn 65de, 150fil with a fusion temperature of 250°C (the processing temperature at which fusion-bonded untwisting begins to occur when false-twisted alone)
as sheath yarn, processing temperature 238℃, false twist number 2400T/M,
Processing was performed at a processing speed of 100 m/min, an overfeed rate of 80% for the wound yarn, and a false twist stretching ratio of 1.3 times.

The heat fusion temperature of the highly oriented undrawn yarn at this stretching ratio was 230 to 235°C.

The obtained false-twisted composite yarn was a three-layer yarn having a typical structure as shown in FIGS. 1 and 2, with a yarn foot difference of 38.5% and yarn elongation of 32%.

The composite three-layer structure yarn obtained in this way was used as the back side knitting yarn 3, and after knitting with a 20G double-sided knitting machine, normal dyeing processing was performed. A knitted fabric with water absorbency and a soft cotton touch texture was obtained.

This knitted fabric was excellent as a material for training wear.

. . . on the left in FIG. 3 indicate the yarn feeding order.

(Effects of the Invention) Although the knitted fabric of the present invention has excellent water absorption and quick drying properties, it is not suitable for use in clothing that requires water absorption, such as innerwear, sports clothing, training wear, and sports shirts. Simply using it on the side that comes into contact with the skin, that is, on the back side, can fully demonstrate its function.

[Brief explanation of the drawing]

FIG. 1 is a side view schematically showing the side surface of the composite three-layer structure yarn used in the present invention, and FIG.
FIG. 3 is a cross-sectional view of the yarn in the direction perpendicular to the yarn axis, and FIG. 3 is a knitting method diagram showing a method of knitting a water-absorbent knitted fabric according to an embodiment of the present invention. 1... Core thread, 2, 3... Sheath thread.

Claims (1)

[Claims] 1. A core in which the back side of a knitted fabric with a front-back structure is composed of a composite three-layer structure yarn, and the composite three-layer structure yarn is a fiber with a lower melting point than the sheath yarn, and has a single yarn fineness larger than that of the sheath yarn. A false-twisted composite yarn in which sheath yarns made of ultra-fine multifilaments with a single yarn fineness of 2 de or less and a filament count of 40 or more are wound around the yarn in an alternating twist pattern with a yarn length difference of 15% or more. A water-absorbing knitted fabric characterized in that a part of the sheath yarn multifilament is at least partially fixed at the winding interface by fusion of the core yarn.