WO2013145456A1

WO2013145456A1 - Knitted fabric

Info

Publication number: WO2013145456A1
Application number: PCT/JP2012/082217
Authority: WO
Inventors: 菜穂子杉野; 石田　幹夫
Original assignee: 株式会社ワコール; 株式会社タケダレース
Priority date: 2012-03-30
Filing date: 2012-12-12
Publication date: 2013-10-03
Also published as: JP2013209762A; JP5296901B1

Abstract

A knitted fabric provided with: a base structure (20) which is formed by knitting and has stretch properties; and a raised knitted structure (30), which is composed of raised yarns, said raised yarns showing an increase in the surface area when bent under a compression force and comprising long fibers or short fibers, in which the raised yarns (31) are swung in different directions each time interwoven along the warp direction relative to the base structure, and which is exposed to the front side of the base structure excluding the both end sections thereof in the width direction wherein the raised knitted structure is interwoven in the base structure.

Description

Knitted fabric

The present invention relates to a knitted fabric.

For example, Patent Document 1 is known as a stretchable narrow raschel lace. In the Russell lace described in Patent Document 1, a non-slip insertion yarn of high stretch yarn is inserted on the back side of the warp knitted narrow stretch lace. For example, the insertion thread moves in the weft direction by one course in a state of protruding from every 4 wales to every 50 wales. Thereby, the anti-slip | skid function is provided to the expansion-contraction raschel race.

JP 2002-115156 A

However, in the technique described in the above patent document, for example, when the lace is stretched in the warp direction, that is, when the lace is stretched in the longitudinal direction, the slippage of the knitted fabric is remarkably reduced as compared with the state where the lace is not stretched. There is a problem that it ends up.

That is, when the race is stretched in the warp direction as described above, it is stretched in the longitudinal direction of the anti-slip insertion yarn, so that the yarn has a thin diameter and the slippage is remarkably reduced.

For this reason, at the time of wearing, even if it was placed on the stretched part, it was not possible to exhibit a sufficient anti-slip effect.

An object of the present invention is to provide a knitted fabric capable of obtaining a sufficient antiskid effect even when the knitted fabric is stretched in order to solve the above-described conventional problems.

The knitted fabric according to the present invention is composed of a basic structure having stretchability knitted by warp knitting, and a floating yarn made of long fibers or short fibers having the property of increasing the surface area when bending occurs due to the action of compressive force, Each time the floating yarn is knitted in the warp direction with respect to the basic structure, the floating yarn is swung in a different direction, and a floating knitted structure in which the portions other than the portions knitted into the basic structure at both ends in the width direction are exposed to the front side of the basic structure Yes.

In such a knitted fabric, the floating knitted structure is not knitted into the basic structure except at both ends in the width direction, and is exposed on the front side of the basic structure. For this reason, when the knitted fabric is pulled in the warp direction (longitudinal direction of the knitted fabric) and contracted in the width direction, a force contracting in the width (course) direction acts on the portion other than the portion forming the loop of the floating yarn, The surface area is kept large.

As a result, even if the knitted fabric is pulled in the longitudinal direction, the surface area of the floating yarn is maintained in a large state, and the slipperiness is exhibited.

The float knitting structure may be swung with a width of three stitches or more in the width direction every time one course proceeds in the warp direction.

The floating knitting structure may be formed such that every time the course advances in the warp direction, the portion in which the width in the width direction is 3 stitches or more and the portion that is less than 3 stitches are repeated.

The configuration may be such that the swinging width of the floating yarn constituting the floating knitting structure is from 7 to 12 stitches.

The yarn constituting the floating knitted structure may be formed by a bundle of long fibers of 1 μm or less.

Knitted fabric may be formed in a tape shape.

According to the knitted fabric of the present invention, the anti-slip function when the knitted fabric extends can be improved.

It is an organization chart of the tape-shaped knitted fabric concerning a 1st embodiment of the present invention. (A) is a figure which shows typically the structure of the floating knitting structure | tissue in the state in which the tension | tensile_strength is not provided in the longitudinal direction of a tape-shaped knitted fabric. (B) is a figure which shows typically the structure of the floating knitting structure | tissue in the state which provided the tension | tensile_strength pulled in a longitudinal direction with respect to a tape-shaped knitted fabric. (A) is a figure which shows typically the binding state of the floating yarn in the state where the tension | tensile_strength is not provided in the longitudinal direction of a tape-shaped knitted fabric. (B) is a figure which shows typically the binding state of the floating yarn in the state in which the tension | tensile_strength is provided to the longitudinal direction of the tape-shaped knitted fabric. The figure which shows the measurement result of the magnitude of the frictional resistance of the conventional tape-shaped knitted fabric in the A column, and the measurement result of the magnitude of the frictional resistance of the tape-shaped knitted fabric having the floating knitted structure in the B and C columns, respectively. It is.

Hereinafter, preferred embodiments of the knitted fabric according to the present invention will be described with reference to the drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted.

The knitted fabric 10 shown in FIG. 1 includes a warp knitted basic structure 20 in which stitches (loops) are formed by ground yarn, and a floating knitted structure 30 that forms a floating portion 32 on the front side of the basic structure 20. In FIG. 1, for simplicity of illustration, the basic structure 20 is only partially shown by broken lines for two wales.

The knitted fabric 10 can be knitted by a warp knitting machine (not shown) such as a Russell machine.

The basic organization 20 is the basis of the knitted fabric 10 and exists throughout the knitted fabric 10. Although the basic structure 20 is a chain knitting structure, the basic structure is not limited to the chain knitting structure, and denby knitting, atlas knitting, or the like may be used as the basic structure. The stitches of the basic tissue 20 may be closed or open. The X direction indicates the course direction, and the Y direction indicates the wale direction.

Here, in the organization chart of FIG. 1, the black dots represent the positions of the needle heads of each course, the black dot rows arranged in the weft direction between the black dots represent one course, and the thread is in the direction of the arrow Y Shows how to weave each wal when supplied. Further, in the organization chart of FIG. 1, for the purpose of expressing the knitting of the yarn by the position of the inter-needle portion, the rightmost inter-needle portion through which the yarn located at the center in the drawing is guided by the guide bar passes and is set to 0. The

numbers

1, 2, 3,...

As the ground yarn that is the knitting yarn of the basic structure 20, for example, nylon yarn can be used. The basic structure 20 is stretchable by weaving elastic yarn such as polyurethane.

The floating knitting structure 30 has a plurality of floating yarns 31 forming a floating part 32 on the front side of the basic structure 20. The floating yarn 31 is knitted into the basic structure 20 by shifting (wasting) alternately by 7 wales (needles) every time one wal is advanced. Here, as a method of knitting the knitted structure 30 that floats on the basic structure 20, for example, a fall plate wrap may be used during knitting. Further, the floating portion 32 is not knitted into the basic structure and is exposed on the front side of the basic structure. Thereby, when the force contracted in the X (wale) direction acts on the floating yarn, the floating portion 32 protrudes (swells) to the front side of the knitted fabric. Thereby, since the floating part 32 keeps a state with a large surface area, it can improve the frictional resistance when it contacts with skin, and can make it difficult to slip.

For this reason, even if the basic structure 20 is pulled in the Y direction, the state in which the frictional resistance of the floating portion 32 is large is maintained, and the slippage of the knitted fabric 10 is maintained. For this reason, even if it uses the knitted fabric 10 for the site | part stretched in the wearing condition of clothing, it can exhibit difficulty in slipping.

Further, the floating yarn 31 is knitted into the basic structure 20 every four wales (needles).

As shown in FIG. 1, the knitted fabric 10 of the present embodiment uses five floating yarns 31 and swings 7 wales each (corresponding to 6 in the interval of the needle heads indicated by black dots in the figure). It is formed so as to cover the entire width of one line. In FIG. 1, the floating yarn 31 is folded back by moving 7 wales in the width direction (X direction in the drawing) every time one course advances in the wale direction (Y direction in the drawing).

Specifically, the floating yarn 31 moves from the inter-needle portion of the number 0 to the inter-needle portion of the number 7 while proceeding from the wale C1 to the wale C2. The floating yarn 31 moves from the inter-needle portion of No. 7 to the inter-needle portion of No. 0 while proceeding from the wale C2 to the wale C3.

Here, the function of the floating knitting structure 30 will be described with reference to FIG.

FIG. 2 (a) is an organization chart schematically showing a state in which no tensile force is applied to the knitted fabric 10. FIG. On the other hand, FIG. 2B is a structure diagram schematically showing a state in which the knitted fabric 10 is pulled in the wale direction (that is, the Y direction).

As shown in FIG. 2B, when the knitted fabric 10 is pulled in the Y direction, shrinkage occurs in the X direction. Therefore, a compressive force acts on the floating yarn 31 in the longitudinal direction. A portion other than the portion knitted into the basic structure 10 is bent as shown by a solid line. As a result, the surface is swollen. For this reason, the floating yarn 31 is not pulled in the longitudinal direction. The floating yarn 31 is formed by twisting long fibers having a diameter of 1 μm or less. Furthermore, as the floating yarn 31, for example, a split fiber type long fiber or a melt spinning type long fiber is suitable. Moreover, although the example which uses a long fiber is given in this embodiment, the thread | yarn which consists of short fibers, such as cotton, may be used as a floating thread | yarn, for example.

FIG. 3 (a) schematically shows the binding state when the floating yarn 31 is not pulled in the longitudinal direction. FIG. 3B is a diagram schematically showing a binding state when the floating yarn 31 is pulled in the longitudinal direction. As shown in FIG. 3 (b), when a tensile force acts on the floating yarn 31 in the longitudinal direction, the long fibers are in a dense state, and the floating yarn 31 floats more than the state where the tensile force does not act as shown in FIG. 3 (a). The surface area of the yarn 31 is reduced, and the slippage of the knitted fabric 10 is reduced.

In the knitted fabric 10, even when the knitted fabric is pulled in the longitudinal direction, the state where the bending occurs as described above is maintained, and the state where the surface area is large as illustrated in FIG. For this reason, even when the knitted fabric is pulled in the longitudinal direction, a high anti-slip effect can be maintained. The swinging width of the floating yarn 31 in the course direction is preferably 3 wales (needle) or more. The stitches of the floating knitting structure 30 may be closed or open. The movement of the kite when knitting the floating knitting structure 30 can be expressed as 1-0 / 6-7 //.

The floating yarn 31 is obtained by twisting four yarns (39 dtex) obtained by twisting 8360 long fibers of 700 nm. In this embodiment, the floating yarn is twisted with 700 nm long fibers, but the present invention is not limited to this. For example, as the floating yarn 31 (floating yarn), it is preferable that long fibers having an outer diameter of 1 μm or less are formed in a bundle, and more preferably, long fibers of 850 nm or less are twisted together.

This makes it possible to increase the surface area of the floating yarn and increase the frictional resistance. Moreover, as said long fiber, split fiber type | mold long fiber and a melt spinning type | mold long fiber are suitable.

The knitted fabric 10 may have a configuration including a pattern yarn, an elastic yarn, and the like not shown in FIG.

Further, the floating knitted structure 30 may be knitted so as to be curved as a whole with respect to the wale direction. More specifically, as in the above embodiment, the floating yarn 31 is not evenly swung left and right evenly in the course direction, but, for example, it is swung by 7 wales (needles) in the left direction and then 1 in the right direction. Repeat the method of swinging the wale and then swinging 5 wales in the left direction and then 1 wal in the right direction. By changing the swing width in this way, it is also possible to form a pattern with a floating knitting structure.

Further, in the present embodiment, the floating knitted structure 30 that is swung evenly from side to side is formed linearly with respect to the Y (wale) direction. For example, by appropriately changing the left and right swing width, Can also be curved. In this case, it is possible to form a floating knitted structure in a wavy shape.

In the above embodiment, an example in which the floating knitting structure 30 is provided in the entire area of the knitted fabric 10 is described. However, for example, it may be provided in a part of the knitted fabric 10 according to the specifications of the product.

Since the floating portion 32 of the knitted fabric 10 is formed by the floating yarn 31 in which a plurality of fibers having an outer diameter of 850 nm or less are bundled, the frictional resistance is increased and the sliding becomes difficult. In this example, an example is used in which a floating yarn having an outer diameter of 850 nm is used. However, the present invention is not limited to this. For example, it is preferable to use a long fiber having an outer diameter of 1 μm or less. However, a thread of 1 μm or more may be used as long as the anti-slip effect at the time of elongation can be sufficiently obtained.

In the above embodiment, the tape-shaped knitted fabric 10 has been described as an example, but the present invention is not limited to this. For example, a wide knitted fabric or another knitted fabric may be used according to the product specifications.

[Evaluation]
FIG. 4 shows the measurement results of the average friction coefficient in the state where the conventional tape material A and the knitted fabric 10 are each stretched by 20%. As shown in FIG. 4, the surface irregularities and the frictional resistance increase in the order of “stainless steel”, “cotton fabric”, and “knitted fabric”. The magnitude of the dynamic frictional resistance when rubbed with these three materials was measured. In addition, the size of the test piece of the conventional tape material A and the knitted fabrics 10 and 40 is a square having a side of 1 cm. The test method was measured by the KES-SE method. The test was performed by applying a load of 25 g and reciprocating 30 seconds in the left-right direction at a speed of 0.1 cm / sec.

In the figure, column A is a measured value of the dynamic friction resistance of a conventional tape material having an anti-slip effect. In the figure, the column B is a measured value of the dynamic frictional resistance value of the tape material of the knitted fabric 10. In the figure, column C is a knitted structure in which floating yarns 31 are knitted every four wales to form a floating knitted structure 30 as in the case of the knitted fabric 10, but two floating yarns 31 are knitted into the same wale two by two. It is a measurement result about the knitted fabric 40 from which a structure differs in the point.

From the measurement results with stainless steel having a small frictional resistance, no significant difference was found between the knitted fabrics 10 and 40 and the tape material A. However, the measurement result with the cotton fabric is 0.62 for the knitted fabric 40 and 0.60 for the knitted fabric 10 and the tape material A, and the dynamic friction resistance is increased by about 3%. Furthermore, the measurement results with respect to the knit fabric indicate that the tape material A is 0.60, whereas the knitted fabrics 10 and 40 indicate 0.82 and 1.03, respectively. In the knitted fabric 40, the standard deviation of the measured value when measuring the dynamic friction resistance with the cotton cloth is 0.026, whereas the measured value when measuring the dynamic friction resistance with the knitted fabric is 0.026. The standard deviation is 0.060. Since the standard deviation of the dynamic friction resistance between the knitted fabric and the knitted fabric is thus increased, it is considered that the measured value slightly exceeded 1 due to the influence of the measurement error.

From the above measurement results, it has been confirmed that the knitted fabrics 10, 40 exhibit remarkably less slippage than the conventional tape material A between the knitted fabrics 10 and 40 having unevenness like the human skin.

In the above embodiment, the method of weaving two floating yarns 31 on the same wale as a method of increasing the surface area by increasing the amount of weaving of the floating yarn 31 has been described. However, the present invention is not limited to this. Instead of weaving the floating yarns 31 two by two as described above, for example, the surface area can be obtained by weaving the floating yarns 31 with respect to the knitted fabric 10 every three wales or every two wales. It may be possible to increase. Further, the floating yarn 31 may be knitted for each wale. Further, the diameter of the floating thread 31 may be larger.

It is also conceivable that the tension applied to the floating yarn when the floating yarn 31 is sent out from the knitting machine is reduced, and a knitted structure having a large shrinkage in the width direction is used as the basic structure instead of the basic structure 20. Also in this case, the amount of the knitting yarn 31 per unit area is increased and the surface area is increased, so that the same effect as in the above embodiment can be obtained.

The knitted fabric of the present invention can sufficiently obtain an anti-slip effect even in a stretched state.

10, 40 ... Knitted fabric 20 ... Basic structure 30 ... Floating knitting structure 31 ... Floating yarn 32 ... Floating part

Claims

A basic structure having elasticity stretched by warp knitting,
It consists of floating yarns made of long fibers or short fibers that have the property of increasing the surface area when bending occurs due to the action of a compressive force. Each time the floating yarns are knitted in the warp direction with respect to the basic structure, they are swung in different directions. A knitted fabric comprising: a floating knitted structure in which a portion other than a portion knitted into the basic structure at both ends in the width direction is exposed to the front side of the basic structure.
The knitted fabric according to claim 1, wherein the floating knitted structure is swung with a swing width of three stitches or more in the width direction every time one course proceeds in the warp direction.
The floating knitting structure is formed so that a portion where the swing width in the width direction is 3 stitches or more and a portion where it is less than 3 stitches are repeated each time the course advances in the warp direction. Or the knitted fabric of 2.
The knitted fabric according to any one of claims 1 to 3, wherein a swinging width of the floating yarn constituting the floating knitted structure is set to be 7 to 12 stitches.
The knitted fabric according to any one of claims 1 to 4, wherein the yarn constituting the floating knitted structure is formed by a bundle of long fibers of 1 µm or less.
The knitted fabric according to any one of claims 1 to 5, wherein the knitted fabric is formed in a tape shape.