JPH0441751A - Water-absorptive knitted fabric - Google Patents

Abstract

PURPOSE:To provide the title knitted fabric good in wiping ability for water and stains, little in fiber falling off, and excellent in appearance, use feeling and wear feeling, thus suitable for handkerchieves, dishcloths, clothing goods etc., knitted to a specific structure using two kinds of yarns differing in fineness from each other. CONSTITUTION:The objective knitted fabric made up of two kinds of yarns differing in fineness from each other with the denier ratio of the fine yarn to thick yarn being 1:(1-5). For the present knitted fabric, in the wale and/or course direction(s) on at least one of the surfaces of the knitted fabric, knitted fabric units consisting of fine yarn stitches and those of the thick yarns are alternately arranged to form stripe- or island-shaped unevennesses on the surface(s), and the number of stitches in such a direction as to cross the unevennesses for the knitted fabric units with more stitches is <=18. The water- absorptive fiber comprising part or the whole of the present knitted fabric is pref. regenerated cellulose fiber, and, furthermore, when the fiber is used in the form of e.g. hollow fiber, the water retentivity of the fabric will be preferably improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a water-absorbing knitted fabric, and more specifically to a cloth,
Towels, handkerchiefs, wipers, and even clothing [Conventional technology] Conventionally, in fabrics that require water absorption, such as cloths, towels, and handkerchiefs, in order to improve the water absorption performance of the fabric, the fibers that make up the fabric have been Various studies have been conducted on the fabric structure. For example, most products that require water absorption, such as dishcloths, towels, and handkerchiefs, are made of cellulose fibers, mainly cotton, and this is a product that takes advantage of the high hydrophilicity of cellulose fibers. However, there are limits to the selection of such materials alone, so for products that require higher water absorption, consideration is also being given to the fabric structure.In particular, pile fabric is a typical water-absorbing fabric structure. can be mentioned. Pile fabric has a high basis weight and has a three-dimensional structure of ground texture and pile texture, so it has excellent water absorption and propagation.
It is widely used and generalized in fields such as towels, wipers, bedding, and clothing. As described above, pile fabrics are commonly used for products that require water absorbency, but on the other hand, there is a problem in that their uses are limited due to their special fabric form. For example, it is not a problem when wiping wet hair or body after taking a bath, but when wiping dishes after washing, it has the disadvantage that it is thick and stiff, making it uncomfortable to use. or,
In the case of pile fabric, the protrusion of the pile part is too large and the fibers tend to fall off, and after wiping off water and dirt,
I often experience that the fibers that have fallen off the wipes stick to the surface of the wipe, causing an unpleasant feeling. On the other hand, when used as clothing such as underwear, there are problems such as the texture being too thick and the appearance looking stiff, making it difficult to obtain a sufficient sense of satisfaction.

[Problem to be solved by the invention]

An object of the present invention is to provide a water-absorbing knitted fabric that has good wipeability of water and dirt, less shedding of fibers, and excellent appearance, usability, and wearability.

[Means to solve problems]

The present inventors have conducted various studies on the water absorbing function of fabrics, and as a result, they have found that the water absorbency of fabrics is largely related to the fibers that organize the fabrics and the structure of the fabric itself, and have completed the present invention.

In other words, the water-absorbent knitted fabric according to the present invention is a knitted fabric made of two types of yarns with different thicknesses, and when the thickness of the yarn indicated by the denier of the thinner yarn is 1, the denier of the thicker yarn is 1. A knitted fabric unit consisting of at least one thin yarn stitch in the wale direction and/or course direction on at least one side of the knitted fabric surface, using yarn whose thickness is greater than 1 and less than or equal to 5. and knitted fabric units consisting of at least one stitch of thick yarn are arranged alternately to form striped or island-like unevenness on the surface of the knitted fabric, and the unevenness of the knitted fabric unit with a large number of stitches is crossed. It is characterized in that the number of stitches in the direction is 18 or less.

Proposing the process by which a fabric absorbs and retains water, it begins with the encounter between the fabric and water, the water transfers to the surface of the fabric, and the water flows between the threads that make up the fabric and between the fibers that make up the threads. Water is absorbed and retained by the fibers, and is also retained between the yarns and fibers. Therefore, in order to obtain a fabric with high water absorption performance, the first step is to make it easy for water to migrate to the fabric surface.
It is necessary to better retain water that has migrated to the fabric surface within the fabric. In order to satisfy the latter condition, the threads constituting the fabric may be made of highly hydrophilic fibers, as is known.

In the present invention, we propose to meet the former condition, that is, to provide an uneven surface on the surface of the fabric in order to make it easier for water to migrate to the fabric surface. When trying to remove a cloth with a concave and convex surface, it is better to move the part of the cloth from the concave part to the convex part with respect to the object, rather than a cloth with a smooth surface such as gauze cloth. Therefore, the present inventor has created a fabric with an uneven surface using a knitted fabric having the above-mentioned structure.

The water absorbent knitted fabric of the present invention may be either a warp knitted fabric or a weft knitted fabric. In the water absorbent knitted fabric of the present invention, two types of yarns with different thicknesses are used to form an uneven surface. The thickness of the thread is determined by the denier, and the thickness of the thick thread is determined to be greater than 1 and 5 or less, compared to 1 for the thin thread. Even if two types of the same thickness are used, unevenness cannot be formed on the surface of the knitted fabric. 2
A difference of 5 or more in the thickness of the yarn, indicated by the denier of the type of yarn, is undesirable because it will cause strain on the knitting needles during knitting, resulting in yarn slippage or yarn breakage. is not necessary for water uptake effects.

The unevenness on the surface of the knitted fabric may be striped, or the unevenness may be arranged adjacent to each other like soccer fabric (woven fabric). In knitted fabrics, this is obtained by alternately arranging band-like knitted fabric units made of thin yarn stitches and band-like knitted fabric units made of thick yarn stitches in a direction perpendicular to the knitting direction of the warp knitted fabric, that is, in the course direction. . On the other hand, in the case of line knitted fabrics, striped fabrics are created by alternately arranging band-like knitted fabric units made of thin yarn stitches and band-like knitted fabric units made of thick yarn stitches in the knitting direction of the weft fabric, that is, in the wale direction. It is possible to form unevenness. In addition, in the case of warp knitted fabrics and weft knitted fabrics, by appropriately selecting the knitting procedure, a rectangular knitted fabric unit consisting of thin yarn stitches in both the wale direction and the course direction and a rectangular shape consisting of thick yarn stitches can be created. By arranging the knitted fabric units adjacent to each other, it is possible to provide the knitted fabric with irregularities (island-like irregularities) of soccer soil temperature. The unevenness may be provided on only one side of the water-absorbent knitted fabric, or may be provided on both sides, and may be arbitrarily selected depending on the use of the water-absorbent knitted fabric and design requirements.

If the distance between the unevenness on the surface of the knitted fabric provided as described above is too large, the water pickup effect will be reduced. As a result of many experiments, the inventor of the present invention found that by reducing the number of stitches in the direction across the unevenness of a knitted fabric unit with a large number of stitches to 18 or less, the arrangement of the unevenness can be made thinner and an excellent water pickup effect can be obtained. I discovered that.

The two types of yarns in the water-absorbent knitted fabric of the present invention may be a single yarn, two or more aligned yarns, or two or more various types of yarns, i.e., the thinner one described above. The yarn and the thicker yarn refer to the yarn that hangs over the knitting needles as a group during knitting. Therefore, in the case of two or more aligned yarns or various threads, the thickness of the yarn is the same as the constituent single yarn. means the sum of the denier of A blended yarn or a blended yarn may be used as the yarn.

In view of the purpose of the present invention, the yarn constituting the water-absorbent knitted fabric of the present invention needs to be partially or entirely composed of water-absorbent fibers. However, yarns made of non-water-absorbing fibers may be used in a part of the knitted fabric to reinforce the fabric. Cotton, wool, and regenerated cellulose fibers can be used as the water-absorbing fibers, especially regenerated cellulose fibers. is preferable, and it is more preferable to use hollow fibers or irregular cross-section fibers because the water retention can be further improved.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to Examples.

In addition, the water absorption performance in the examples is based on the bisic method, water absorption capacity,
Indicated by dropping method and rewetting property. These were measured and evaluated as follows.

)<42-9 sample (longitude 20CIIX latitude 2.5cm)
Immerse it in water up to the bottom 21 and let it absorb the water.

After 10 minutes, measure the propagated water level.

Hosui U Sample (10 cm
5 minutes), weigh it, and let the value be A.

Thereafter, it was absolutely dried at 105° C. for 3 hours, weighed, and the value was designated as B.

The water absorption capacity is expressed by the swelling ratio shown by the following formula.

Swelling rate (%) - (A/B-1)
Sprinkle on a 10 cm diameter area and weigh the amount of water captured.

Ih Disaster Blood Drop 1 cc of water onto a plastic plate, and place a sample of known weight (Ag) on top of it.
1), apply a load of 250g, let it absorb water for 30 seconds, remove the sample, and measure the amount of water remaining on the plastic plate (
Find Bg). Thereafter, the water-absorbed sample is placed on a filter paper, a load of 250 g is applied, and the weight of the sample is determined after being left for 10 seconds. (Cg) Wetting rate (%) = (1+A-B-C) / (1-B) , indicating excellent water absorption performance.

1 to 4 and 1 to 3 One yarn is polyester 50 denier, the other yarn is polyester 75 denier, and rayon hollow fiber 15
0 denier, circular knitting machine made by Taiyo Iron Works (
Double, 22G, Irusumi Morato), the thinner thread is 20
, the fabric is obtained by feeding the thicker yarn through 60 supply ports and alternately knitting a knitted fabric unit in which two rows of thinner yarn are knitted and a fabric unit in which six rows of thicker yarn are knitted. This is referred to as Example 1.

In addition, Example 2 is a knitted fabric in which the same yarn as in Example 1 but with thicker yarn is knitted in 10 rows, and this and 2 rows of thinner yarn are knitted alternately. Example 3 was a knitted fabric in which 18 rows of yarn were knitted continuously, and this and 2 rows of thin yarn were knitted alternately.

Comparative Example 1 is a knitted fabric in which a unit knitted with 20 rows of the same yarn as in Example 2, but thicker, and a unit knitted with 2 rows of thinner yarn are alternately knitted. On the other hand, a knitted fabric was prepared using the same circular knitting machine and knitting method as in Example 1, using a thinner yarn of 50 denier polyester and a thicker yarn of 250 denier mixed fiber yarn of polyester and rayon. Comparative Example 2 is a knitted fabric obtained in the same manner as in Example 4 except that one yarn is made of 50 denier polyester and the other yarn is made of 50 denier rayon. In addition, 6 more cotton
Example 5 is a knitted fabric in which 40 count yarn (approximately 130 denier) and 20 count yarn (approximately 260 denier) are knitted in the same manner as in Example 1. Comparative Example 3 is a plain-woven fabric made of 20 count blended yarn (approximately 260 denier) of 35% rayon and 35% rayon.

The water absorption performance of these fabrics was measured. Furthermore, in order to compare the performance of these fabrics when used as a dish towel, we actually wet a teacup and repeatedly wiped off the water on the surface with a dish towel. We investigated the number of wiping operations until it could not be completely removed and the feeling of wiping.

〔Effect of the invention〕

The water-absorbing knitted fabric of the present invention has excellent water absorption, wiping properties, and ease of use, so it can be used in cloths, towels, handkerchiefs, wipers, etc.
It can be suitably used in all fields such as clothing and bedding.

Claims (1)

[Claims] 1. A knitted fabric consisting of two types of yarns with different thicknesses, where the thickness of the thinner yarn in denier is 1, and the thickness of the thicker yarn in denier is greater than 1. A knitted fabric unit consisting of at least one thin yarn stitch and at least one thick yarn in the wale direction and/or course direction on at least one side of the knitted fabric surface, using yarn with a diameter of 5 or less. A knitted fabric unit consisting of stitches of
A water absorbent knitted fabric characterized by having a water absorbency of 8 or less.