JPS6039439A - Nonwoven fabric-like ultra-fine fiber knitted fabric and itsproduction - 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 a non-woven ultra-fine fiber woven or knitted fabric with less selvage or mesh irregularities, and a method for producing the same.

(Prior Art) Knitted fabrics made of normal denier fibers are already known. In general, such knitted fabrics not only do not have sufficient softness or good touch, but also have a rough and coarse appearance. On the other hand, it is also conceivable to make such a knitted fabric using ultrafine fibers. But when you actually make it.

It is normal for it to be squishy, smooth, thin, and rough.

On the other hand, knitted fabrics generally suffer from selvage and have extremely poor practical value.

Moreover, this tendency was no exception for ultrafine fiber knitted fabrics.

Furthermore, until now, the only way to increase the density of knitted fabrics was to make the machine finer or to apply tension so that the knitting itself could be more precisely knitted.

For this reason, they have been mixed with nylon, split into composite fibers, and then shrunk with benzyl alcohol. In this case, the current situation is that the product is either a mixture of nylon, which has a lower strength, or a product made only of fibers, which have a lower strength.

The same can be said of textiles. This is especially noticeable for knitted fabrics.

(Object of the present invention) In view of the shortcomings of such techniques, the present invention aims to obtain a high-density woven or knitted fabric with less selvage or mesh irregularities, and an optimal manufacturing method for obtaining such a woven or knitted fabric, in particular a woven or knitted fabric. (Structure of the present invention) For this purpose, after many years of various studies, we have finally arrived at the present invention. The outline is as follows.

(1) Lord and Lte0. 2-0. A tI & knitted fabric mainly composed of ultrafine fiber bundles with 00001 tails, both between stitches or between stitches and between fiber bundles.

A nonwoven ultrafine fiber woven or knitted fabric characterized in that at least ultrafine fibers are entangled.

(2) An ultra-fine fiber woven or knitted fabric mainly consisting of ultra-fine fiber bundles of 0.2 to 0.00001 denier is made, and then at least 5 to 200 kg/- of fluid is vertically applied to the woven or knitted fabric through a large number of small holes. Or the shrinkage rate in the horizontal direction is 15%
1. A method for producing a non-woven ultrafine fiber woven or knitted material, characterized in that the woven or knitted material is shrunk by jetting the material until it exceeds .

(3) The nonwoven ultrafine fiber woven fabric according to claim (2), wherein the ultrafine fiber bundle is obtained from a multicomponent fiber capable of generating ultrafine fibers. Method of manufacturing knitted fabrics.

Fibers of 0.2 denier or less can be made by a method using polymeric mutual array fibers, commonly called sea-island composite fibers, or the island components can be made into polymeric mutual array fibers, known as sea-island composite fibers. In this case, the sea component may be separated using a solvent or a decomposition agent, or it may be separated like a peelable split fiber consisting of two components A and B.

Further, in the direct spinning method, spinning conditions may be made stricter. Further, it may be made thin using the super draw phenomenon, or may be made by a method other than these.

Furthermore, by using split fibers of a peelable type consisting of two components A and B, fibers of 0.2 denier or less may be obtained.

Any conventional method can be used to make the knitted fabric.
Includes horizontal knitting, warp knitting, and second-class all-over knitting (in a broad sense).

Various methods can be considered for entangling the ultrafine fibers, but the most effective method is water jet punching. That is.

A water jet punch is a typical example of a method for injecting a fluid of 5 to 200 kg/- from small holes onto one or both sides of the knitted or woven fabric. If the spray pressure is too low, the fibers will not get tangled, but if the spray pressure is too high, the fibers will be cut, which is not good. Within this range, it is determined as appropriate depending on the strength of the fiber, the fineness at that time, the thickness of the bundle, etc. When a sea component is present, the water jet punch often removes the sea component, which is desirable and not a disadvantage. This does not impede the effectiveness of the invention.

Water jet punches themselves are well known, and need not be cited here.

Can be applied with or without a pattern. Conventional.

It may have been considered to perform water jet punching on ordinary fibers, but it does not meet the requirements of the present invention, such as almost no entanglement, hardness, poor appearance, poor shrinkage, and poor touch. Furthermore, even if there was an idea to apply water jet punch to long fiber knitted fabrics or woven fabrics, it would be accompanied by the above-mentioned problems. This is because there is no entangling effect, or when the fibers are applied strongly to entangle them, the fibers themselves become fibrillated or are cut. Furthermore, the treatment of the present invention has not been applied to such materials alone.

For this reason, at present, &ll fibers have only been made into a web, that is, very short staple fibers, and entwined to have industrial value.

On the other hand, according to the present invention, since ultra-fine fibers are used, surprisingly, even if the fibers are long fibers and a knitted fabric is missing, the fibers become entangled, causing "shrinkage" and "fiber bundles". It is possible to entangle not only the inside but also between the fiber bundles to create a sufficient bulge in the J, rl!@ core, and it is possible to ``cause a bouncy feeling and an increase in thickness.'' As a result, we have created a dense knitted fabric with less tangles, and have succeeded in bringing out a number of applications and uses, such as products that are ``difficult to pass through the wind'' and ``warm IJA'' products. The same applies to textiles. The knitted fabric may be in any form such as a sheet, cylinder, or tube. Water jet punching can also be performed in such a state.

It is preferable to apply water jet punching in the state of ultra-fine fibers (for example,
In the case of sea-island type fibers, the fibers may be separated into ultra-fine fibers by a water jet punch (after sea removal), or may be entangled by a water jet punch while the sea component is removed by a water jet punch.

Water jet punching can be done from the front side, from the inside if it is cylindrical from the back side, or by turning it over, water jet punching it from the front side, and then turning it over again. When using a cylindrical shape, one of the secrets is to perform water jet punching from the inside or by turning it inside out, then waterjet punching it from the front, and then turning it over again. It is preferable that the water jet punch be oscillated from side to side or cyclically so as not to match the period of the knitting structure or weaving structure of the knitted material. Thereby, punch lines and moire phenomena can be reduced.

When processing ultra-fine fibers and water jet punching in parallel, apply a splitting accelerator for bipartite type fibers (for example, add benzyl alcohol when combining polyester and nylon type fibers), and for seabird type fibers, add a splitting accelerator. It is important to add an oil agent that enhances the ability to remove sea components by water jet punching.

The present invention is fundamentally different from cutting ultra-fine fibers on knitted or woven fabrics of ordinary fibers, placing them on a paper-making method, or sandwiching them into a sandwich and water-jet punching them. must be noted. They differ in effect, structure, and principle.

In the present invention, it is also possible and preferable to further apply water jet punching to conventional fibers which have been made highly shrinkable in advance and subjected to shrinkage treatment after &M or weaving. If you want to avoid high shrinkage because it tends to stretch, knit without high shrinkage.

Particularly preferred is subsequent boiling water treatment followed by water jet punching with or without ultrafine fiber formation. In order to improve the entanglement of fibers during water jet punching, it is also preferable to treat the knitted fabric with an oil agent in advance. Furthermore, it is particularly preferable that the knitted fabric or woven fabric according to the present invention is subjected to water jet punching, and then subjected to shrinkage treatment, boiling water treatment, and/or heat setting treatment. This is because this method is the most effective for producing ultra-dense, ultra-fine fiber non-woven knitted fabrics.

The special knitted fabric or fabric made from the present invention can be further subjected to silicone-based or fluorine-based water repellent treatment, dyeing finishing treatment, coating or laminating treatment, impregnation treatment, sewing processing, etc.
In the case of a cylindrical shape, it is preferable to perform sterilization treatment as an artificial blood vessel, water absorption by making use of ultra-fine fibers, and hydrophilic treatment, either alone or in combination.

(Effects of the present invention) The effects of the present invention are enumerated as follows.

(1) A woven or knitted fabric with a good touch can be obtained.

(2) A high-density woven or knitted fabric can be obtained.

(3) A woven or knitted fabric can be obtained that does not have selvage or mesh irregularities like non-woven fabrics.

(4) A woven or knitted fabric that is thick, soft, and has air retention ability can be obtained.

(5) Unlike the shrinkage method using chemicals, a woven or knitted fabric with high strength can be obtained because there is no deterioration in physical properties due to chemicals.

Products made in accordance with the present invention have many useful uses, including:

Underwear, underwear, windbreakers, silk-like clothing,
II! Water fabric, waterproof fabric, moisture permeable fabric 2 Medical materials or parts such as artificial blood vessels, gauze, bandages, etc.

Absorbent materials for sanitary use 9 Artificial leather 1 Artificial fur base, various industrial materials for separation, heat insulation materials, wiping materials, holding materials for adsorption, etc.

Examples are shown next, but the validity and scope of rights of the present invention are not limited or restricted thereby. Rather, it brings about the next application and development.

Example 1.2.3 Polymeric interarray fiber with polystyrene as the sea component and polyethylene terephthalate as the island component, with an island/sea ratio of 90/10, total denier 50XlO
A yarn knitted fabric made of filament yarn was placed in boiling water, dried, washed with trichlorethylene, dried, and then a water jet punch was applied to the yarn with a diameter of 0.15 mm. The 0-knit fabric, which was water-jet punched under the conditions shown later with the back pressure P (Kg/cd) of the 1-cutter plate, undergoes shrinkage, and the 1-knit fabric becomes entangled, making it difficult for stitches to shift and creating a thick texture. It has undergone a major change to a hook-like, ultra-fine fiber knitted fabric.

Knitting machine Double-sided circular knitting machine (32G) Structure Interlock fiber 50D-1Of (70 islands) Island/sea ratio 1 = 90/10 Island denier = 0.065 d Knitted thickness = 0.45 Audience weight = 83 g/nf Boiling water shrinkage Thickness after = 0.43 11 dimensions = 113 g/nr Thickness after sea removal = 0.27 day basis weight = 107 g/nf Water jet punch (Example 1) p = ioo 1 time from one side 1 time water jet J-7 punch thickness = 0.45 to 0.47+m Shrinkage rate = 30x length 18.3% (Example 2) Water jet punch once from one side of P-50 Thickness = 0.42 to 0.45mm Shrinkage rate 25x length 15.7% (Example 3) P = 50 Water jet punched twice from one side Thickness = 0.47 to 0.52 m Shrinkage rate - 37.5% (vertical) x 11.2% (horizontal) The conditions and results in this case were as above.

These knitted fabrics were dense and thick, did not easily fray, and were supple.The structure of these fabrics was found to be good.

Of course, it is a knitted fabric mainly composed of bundles of 1 denier ultra-fine fibers, and at least the ultra-fine fibers are intertwined between the nine stitches and between the fiber bundles, making it a dense ultra-fine fiber with little tangle. It was knitted.

Example 4. 5. 6 The test was carried out on a woven fabric in the same manner as in the case of the knitted fabric in Example 1.

The conditions and results at that time are shown below.

Fabric Plain weave Warp and weft both 50D -1Of (70 islands) Island denier 0.069d Island/sea ratio -93/7 Finished weave density = vertical 148 x horizontal 100 pieces/inch Thickness = 0
．． 1356 Thickness after relaxation = 0.125 Thickness after crane removal = 0.115 Thickness after dragon intermediate setting = 0.14 m Thickness after dyeing - 0.11 m Water jet punch (Example 4) Water jet punched once from one side of Pm2O3 Punch thickness = 0.28-0.31+n Shrinkage rate = 27.5% vertically x 14.5% horizontally (Example 5) Water jet punched once from one side of P-50 Thickness = 0.25-0.26 days Shrinkage rate = Vertical 22.5X Horizontal 8.5% (Example 6) P=50 Water jet punch from one side twice Thickness - 0.26 to 0.27 Tsuru shrinkage rate = Vertical 26. OX horizontal 9.0% These fabrics were dense, thick, resistant to fraying, and flexible. Upon careful investigation, these structures were found to be 0
．． 2~o, ooo.

Of course, it is a fabric mainly composed of bundles of 1 denier ultra-fine fibers, and it is a dense ultra-fine fiber with at least ultra-fine fibers intertwined both between the weaves and between the fiber bundles, and with little sagging. It was made of textiles.

Claims (3)

[Claims] (1) A woven or knitted fabric mainly composed of superpolar n+sab fibers of 0.2 to 0.00001 denier, both between the 1i stitches or between the weaves and between the fiber bundles. A nonwoven ultrafine fiber woven or knitted fabric characterized in that at least ultrafine fibers are entangled. (2) An ultrafine fiber woven or knitted fabric mainly consisting of ultrafine fiber bundles of 0.2 to 0.00001 denier is made, and then a fluid of at least 5 to 200 kg/cd is vertically applied to the woven or knitted fabric through a large number of small holes. Or the contraction rate in the horizontal direction is 15
1. A method for producing a non-woven ultrafine fiber woven or knitted material, which comprises shrinking the woven or knitted material by spraying the material until the amount exceeds %. (3) The nonwoven ultrafine fiber woven fabric according to claim (2), wherein the ultrafine fiber bundle is obtained from a multicomponent fiber capable of generating ultrafine fibers. Method of manufacturing knitted fabrics.