WO2002063082A1

WO2002063082A1 - Three-layer knitting fabric

Info

Publication number: WO2002063082A1
Application number: PCT/JP2002/001109
Authority: WO
Inventors: Tsuyoshi Soeda
Original assignee: Teijin Limited
Priority date: 2001-02-08
Filing date: 2002-02-08
Publication date: 2002-08-15
Also published as: KR20030081428A; US20040060328A1; EP1359238A1; JP3880320B2; DE60219284D1; KR100821114B1; CN1501996A; DE60219284T2; EP1359238B1; JP2002235264A; EP1359238A4

Abstract

A three-layer knitting fabric which has a surface layer having a yarn knit fabric structure, a back layer having a yarn knit fabric structure, and a connecting intermediate layer comprising knotting yarns which tucks those yarn knit fabric structures, characterized in that the above knotting yarns comprise hollow fibers (for example, filaments having a percentage of hollowness of 10 to 50 %). The three-layer knitting fabric is useful as a material for an underwear which needs high lightweight property, warmness retaining property and the like.

Description

Description Three-layer knitted fabric Technical field

The present invention relates to a three-layer knitted fabric. More specifically, the present invention relates to a three-layer knitted fabric in which an intermediate knitted fabric layer made of a hollow binding yarn is arranged between a surface knitted fabric layer and a back knitted fabric layer. is there. INDUSTRIAL APPLICABILITY The three-layer structure knitted fabric of the present invention is suitably used for undergarments requiring high lightness and heat retention. Background art

Generally, a three-layer knitted fabric formed by tacking the front and back knitted fabric layers with a binding yarn is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-158483. Because of its excellent heat retention and good appearance, it is widely used in sports clothing, for example, training wear, and power clothing for children and women. When this three-layer knitted fabric is used for underwear, it is required to have a high heat retention property and further improve the lightness.

Conventional underwear knitted fabrics include natural fibers such as cotton, or natural fibers and synthetic fibers (eg, polyester nylon), regenerated fibers (eg, rayon), or semi-synthetic fibers (eg, tris). A yarn obtained from a combination with acetate fiber) is knitted by a circular knitting machine into a milling structure or a sheeting structure, and is widely used. In such conventional underwear knitted fabrics, when further improvement in heat retention is required, the front or back surface of the knitted fabric is brushed, or the knitting yarn is far-infrared and / or near-infrared. Fiber manufactured by kneading a substance that absorbs The use of water or functional fibers that generate heat by absorbing moisture in the air achieves improved heat retention. However, when brushed, the thickness of the knitted fabric may be significantly increased, and when the above-mentioned functional fiber is used, the effect of improving the heat retention may be unsatisfactory. In this case, It is necessary to increase the thickness of the knitted fabric, resulting in a disadvantage that the weight becomes excessive. Disclosure of the invention

An object of the present invention is to provide a three-layer structure knitted fabric that is useful for knitted clothing having high lightness and heat retention.

The above object can be achieved by the three-layer structure knitted fabric of the present invention. The three-layer structure knitted fabric of the present invention includes a surface layer having a yarn / knit structure, a back layer having a yarn / knit structure, a yarn / knit structure of the surface layer, and a yarn / knit structure of the back surface layer. And a connecting intermediate layer made of a binding thread for tacking.

The binding yarn is formed of a hollow fiber.

In the three-layer structure knitted fabric of the present invention, the binding yarn is a polyester multifilament yarn, the thickness of the yarn is 20 to 170 dt ex, and the thickness of the single filament is S 1. 1010 dtex and the hollow rate of the single filament is preferably 10 to 55%.

The three-layer structure knitted fabric of the present invention preferably has a thickness of 0.5 to 1.5111111 and a basis weight of 80 to 200 8 / m ² .

In three-layer structure knitted fabric of the present invention, the connecting intermediate layer is preferably a 25 to 60 g Z m ² basis weight.

The three-layer structure knitted fabric of the present invention preferably has a heat retention rate α of 18% or more. Good.

In the three-layer knitted fabric of the present invention, the yarn constituting the surface layer is a polyester bulky multifilament yarn, the yarn thickness of which is 20 to 170 dtex, and the single filament is used. Is 0.:! It is preferably about 20 dTex.

In the three-layer structure knitted fabric of the present invention, it is preferable that the yarn constituting the back layer is made of at least one kind of fiber selected from natural fibers, synthetic fibers, regenerated fibers, and semi-synthetic fibers. .

The three-layer structure knitted fabric of the present invention preferably has a circular knit structure. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an explanatory cross-sectional view showing a configuration of an example of a three-layer structure knitted fabric of the present invention.

FIG. 2 is a cross-sectional photograph of an example of the three-layer knitted fabric of the present invention.

FIG. 3 is an organization chart of an example of the three-layer knitted fabric of the present invention.

FIG. 4 is an explanatory sectional view of a dry contact heating device used for measuring the heat retention α of the three-layer knitted fabric of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

The three-layer structure knitted fabric of the present invention is formed by tacking a surface layer and a back layer made of a yarn knitted into a knitted structure, a yarn knitted structure of a surface layer, and a back layer yarn knitted structure to connect them. And a connection intermediate layer made of a binding yarn. The connection yarn forming the connection intermediate layer is made of a hollow fiber.

In the present invention, the hollow fiber includes a peripheral wall portion extending along the longitudinal direction of the hollow fiber and having an annular cross-sectional shape, and a hollow portion surrounded by the peripheral wall portion and extending in the longitudinal direction of the hollow fiber. is there. When the three-layer knitted fabric of the present invention is formed on an undergarment, the three-layer knitted fabric undergarment is arranged such that the back surface layer faces the skin surface of the wearer and the surface layer faces the outside air side. Used. At this time, since the back layer often comes into contact with the wearer's skin, it is required that the back layer has good heat retention and sweat and moisture absorption properties, and also has a good touch feeling. In addition to a good appearance, it is required to have an appropriate degree of slipperiness with the outer garment overlaid, etc. The connecting intermediate layer has strong tackiness, good shape retention (pressure resistance and shrinkage), and high heat retention. Desired.

The three-layer structure knitted fabric 1 of the present invention shown in FIG.

(a) a surface layer 2 composed of a yarn 2a knitted in a knitted structure,

(b) a back layer 3 composed of a yarn 3a knitted in a knitted structure,

(c) Consists of hollow binding yarn 4a that is connected to yarns 2a and 3a that form the knitted structure of front and back layers 2 and 3 and that connects front and back layers 2 and 3 to each other. And a connection intermediate layer 4.

FIG. 2 shows a cross-sectional photograph of an example of the three-layer knitted fabric of the present invention. In FIG. 2, the yarn 2 a constituting the knitted structure of the surface layer 2 and the yarn 3 a constituting the knitted structure of the back layer 3 are connected to the binding yarn 4 of the connecting intermediate layer 4. tacked by a. The filaments constituting the binding yarn 4a shown in FIG. 2 are hollow filaments as can be seen from the cross section seen in FIG.

FIG. 3 shows an example of the knitted structure of the three-layer structure knitted fabric of the present invention. Figure 3 — (1) and (4) show the knitted structure of the surface layer, and Figure 3 — (2) and

(5) shows the knitted structure of the back layer, and Figs. 3-(3) and (6) show the knitted structure of the connected middle layer.

In the three-layer knitted fabric of the present invention, the type of the binding yarn used for the connecting intermediate layer is not limited. For example, it is preferably a hollow multifilament yarn, and in this case, the thickness is small. , 20-: L 70dt ex Preferably, the thickness of the single filament is 1 to 10 dtex, and the hollow ratio of the single filament is 10 to 55%, and 20 to: LOOD d ex, 2 to 5 d ex respectively. And more preferably 30 to 55%. The hollow ratio means the percentage of the new area of the hollow portion with respect to the cross-sectional area of the hollow filament in the cross section of the hollow filament. In addition, the binding yarn may be a spun yarn (preferably, thickness: 20 to: L70dt ex) having a hollow short fiber (preferably, thickness :: to 10 dt ex, hollow ratio: 10 to 55%). .

The type of hollow fiber constituting the binding yarn is not particularly limited, but is preferably selected from organic fibers for clothing, for example, hollow polyester long fiber, hollow nylon long fiber, and hollow polyester short fiber. Fibers, hollow short fibers or composite fibers thereof are used, and among these, hollow polyester long fibers are preferably used.

In the three-layer structure knitted fabric of the present invention, the basis weight of the connecting intermediate layer is

/ m ² , more preferably 30 g to 50 g. By doing so, the obtained three-layer structure knitted fabric of the present invention can exhibit high heat retention and lightweight.

The surface layer of the three-layer structure knitted fabric of the present invention is constituted by bulky yarns such as false twisted yarns, spun yarns, air entangled yarns, and hetero-shrinkable mixed fiber yarns. In this case, a knitted fabric having high heat retention can be obtained. It also improves the feel of the resulting knitted fabric and prevents the binding yarn used for forming the connecting intermediate layer from extending from the outer surface of the surface layer when it is tacked to the surface layer forming yarn. In order to achieve this, the yarn constituting the surface layer preferably has a thickness of 20 to: L70 d ex and a single fiber thickness of 0.1 to 20 d ex, and 50 to 150 d ex, 2 to 5 d ex, respectively. More preferably, dt ex. There are no particular restrictions on the types of fibers that make up the surface layer yarn, such as fibers such as polyester, nylon, acetate, acryl, rayon, cotton, wool, and silk. Such composite yarn fibers and the like can be used, and among them, it is preferable to use polyester fibers. Preferably, these fiber yarns are false twisted multifilament yarns, and more preferably, false twisted polyester multifilament yarns.

Basis weight of the surface layer is preferably 20 to 60 g / m ^2, preferably Ri good to be 30~ 50g / m ^2.

In the three-layer knitted fabric of the present invention, the yarn forming the knitted structure of the back layer is made of natural fibers (for example, cotton, wool, silk, etc.) and synthetic fibers (for example, polyester, nylon, acryl, etc.). It is preferable that the yarn is selected from a single yarn selected from regenerated fibers (for example, rayon, Cubra, etc.) and semi-synthetic fibers (for example, triacetate fibers) or a combination of two or more yarns. Back surface When the three-layer structure knitted fabric of the present invention is used for clothing, the fiber yarn for the back layer has good wear comfort for the wearer (for example, cotton, rayon polyester, nylon yarn or the like). Or more composite yarns). The yarn for the back layer may be either a multi-filament yarn or a spun yarn, and the multi-filament yarn may be one subjected to bulk processing. The thickness of the yarn for the back layer is preferably 40 to 300 6 (130 to 20), more preferably 70 to 200 dtex. The basis weight of the back layer is preferably from 30 to 100 g Zm ² , more preferably from 40 to 70 g / m ² .

There is no particular limitation on the thickness and basis weight of the three-layer knitted fabric of the present invention. And only a three-layer structure knitted fabric, in order to obtain both high insulation and light weight, the thickness of 0 · 5~: L 5mm, it is that the basis weight is 80 to 200 g Roh m ² More preferably, they are 0.6 to 0.8 mm and 110 to 150 g Zm ² , respectively. The heat retention of the three-layer structure knitted fabric of the present invention measured by the following method is preferably 18% or more, and more preferably 20% or more.

In an atmosphere maintained at a temperature of 20 ° C, the heating device shown in Fig. 4 (Large BT_Box, manufactured by Kato Tech Co., Ltd., model: Thermolab II) 5, heating surface placed on top (Dimensions: lOcm X lOcm (Only the surface is openly exposed and the others are insulated) is kept at a constant temperature of 65 ° C, a test sample of 10 cm X 10 cm is placed on it, and the heated surface temperature is set to 65 ° C. Measure the amount of power (watt) consumed to hold for 1 minute. For comparison, the power consumption W _Q (pet) when the test sample is not placed on the heated surface is measured. The heat retention rate of the test sample is calculated by the following formula.

Heat retention rate α (%) = (W. one / W ₀ X 100

In order to produce the three-layer knitted fabric of the present invention, for example, a yarn forming a surface layer structure and a yarn forming a back layer structure are supplied from one side and a dial side of a circular knitting machine, respectively. Then, while knitting to a desired structure, for example, the structure shown in FIG. 3, the surface layer knitted structure and the back layer knitted structure are tacked by a hollow fiber binding yarn to form a connection intermediate layer. Just do it. Example

The three-layer knitted fabric of the present invention will be further described with reference to the following examples. However, the scope of the present invention is not limited by the following examples.

Example 1

The three-layer knitted fabric of the present invention was knitted using a circular knit 23 G double machine. As the surface layer yarn, a 56 dt ex / 36 filament polyethylene phthalate false twisted yarn is used, and as the back layer yarn, 98 dt ex (60th count) cotton spinning Using a 40 dt _ex / 12 filament polyethylene phthalate hollow fiber (hollow rate: 35%) as the binding yarn for the connecting intermediate layer The three-layer knitted fabric having the knitting structure shown in FIG. 3 was manufactured by tacking the knitted fabric structure of the back surface layer with a hollow filament binding yarn to form a connecting intermediate layer. Table 1 shows the thickness, basis weight and heat retention of the obtained knitted fabric.

This knitted fabric was excellent in lightness and heat retention, had a soft surface touch, had no binding yarn projecting or exposing on the knitted fabric surface and back surface, and had a good quality as an external product.

Comparative Example 1

Using a circular knitting 23 G double machine in the same manner as in Example 1, according to the organization chart shown in Fig. 3, a polyethylene phthalate false twisted yarn of 56 dt ex no 36 filament for the surface layer, 98 dt for the back layer ex (60th) cotton spun yarn, long, and as a yarn for the connecting intermediate layer, a 56dt ex 24 filament polyethylene terephthalate non-hollow fiber yarn is used. X, three layers Structural fabric was manufactured. Table 1 shows the thickness, basis weight and heat retention.

The three-layer knitted fabric of Comparative Example 1 had the same appearance quality, thickness, and basis weight as those of Example 1, but had insufficient heat retention α.

Comparative Example 2

Using a circular knitting machine, a knitted fabric with a milling structure was knitted using a spun cotton yarn of 147 dtex (40th count). Table 1 shows the thickness, basis weight, and heat retention α. Although the obtained knitted fabric was large in both thickness and basis weight as compared with the knitted fabric of Example 1, the heat retention rate was remarkably low.

table 1

[Industrial applicability]

The three-layer structure knitted fabric of the present invention is relatively excellent in heat retention compared to its thickness and basis weight, and is relatively excellent in weight compared to its thickness and heat retention, It is a textile material suitable for applications such as undergarment materials that require high lightness and heat retention.

Claims

The scope of the claims

1. A connection comprising a surface layer having a yarn-knit structure, a back layer having a yarn-knit structure, and a binding yarn for tacking the yarn-knit structure of the surface layer and the yarn-knit structure of the back layer. And an intermediate layer,

The three-layer knitted fabric, wherein the binding yarn is constituted by hollow fibers.

2. The binding yarn is a polyester multifilament yarn, the thickness of the yarn is 20 to 170 dtex, the thickness of a single filament is 1 to 10 dtex, and 3. The three-layer knitted fabric according to claim 1, wherein the hollow rate of the single filament is 10 to 55%.

3. has a thickness and 80 to 200 g / m ² of basis weight of 0.5 to 1.5 mm, a three-layer structure knitted fabric according to paragraph 1 range billed.

4. The coupling intermediate layer has a basis weight of 25~60g Zm ^2, a three-layer structure knitted fabric according to claim 1.

5. The three-layer knitted fabric according to claim 1, having a heat retention rate α of 18% or more.

6. The yarn constituting the surface layer is a polyester bulky multifilament yarn, the yarn thickness is 20 to 17 dtex, and the single filament has a thickness of 0.1 to 20 dtex. 3. The three-layer structure knitted fabric according to claim 1.

7. The yarn according to claim 1, wherein the yarn constituting the back surface layer is composed of at least one fiber selected from natural fibers, synthetic fibers, regenerated fibers, and semi-synthetic fibers. 3. The three-layer knitted fabric according to the above.

8. The three-layer structure knitted fabric according to claim 1, which has a circular knitting structure.