Double knitted fabric with excellent elastic restoring force

Abstract

The present invention is to provide a double knitting with excellent designability, which is manufactured by fastening a surface fabric and a backing fabric with a polyester monofilament yarn as a connecting yarn, wherein the surface fabric is knitted using an elastic composite yarn including an elastic yarn.

Description

Double knit fabric with excellent elasticity and resilience

[0001] The present invention relates to a double knitted fabric with excellent elastic recovery, and more specifically, to provide a double knitted fabric with excellent elastic recovery, which is manufactured by joining a surface fabric and a back fabric knitted using an elastic composite yarn containing an elastic yarn using a polyester monofilament yarn as a connecting yarn.

[0002] In general, knitting, unlike fabrics, is made by inserting threads from one direction to create loops and connecting the loops to form fabric. Various types of knitting are used, such as knitwear and stockings.

[0003] Traditionally, double knitted fabrics made by the double Raschel machine warp knitting, that is, double knitted fabrics made of a surface fabric, a back fabric, and a connecting yarn to connect them, have been used for interior design, bedding, medical, nursing, medical, cushioning, industrial materials, and various other purposes.

[0004] As a prior art for double knitted fabrics, Korean Patent Publication No. 10-2002-0076313 discloses a double knitted fabric in which the knitting loop portion of the connecting yarn does not protrude from the surface of the base fabric, thereby not damaging the characteristics of the surface knitting yarn material, such as the feel of the fabric, and has good structure, can be made lightweight by reducing the density of the connecting yarn, can prevent friction noise, and has good pressure resistance and elasticity in the thickness direction. Korean Patent Publication No. 10-0566627 discloses a double-knitted fabric with excellent elasticity, and a manufacturing method thereof, which is knitted with a double-sided circular knitting machine using a cotton / PTT / Tencel composite Siro-Slub spun yarn as a surface yarn and a sweat-absorbing and quick-drying polyester DTY yarn as a back yarn.

[0005] The double knitted fabric according to the above conventional technology has limited formation of patterned patterns on the surface, and thus cannot satisfy the purchasing needs of modern consumers who seek diverse patterns and unique textures. In addition, a double knitted fabric has been proposed in which two pieces of knitted fabric are joined with a heat-melting yarn to provide appropriate insulation, but there is a problem in that it is difficult to provide elasticity to the double knitted fabric as a whole due to almost no elasticity and elastic recovery, which causes discomfort to the user.

[0006] The present invention relates to a double knitted fabric having excellent elastic recovery, and more particularly,

[0007] Specifically, the purpose is to provide a double knitted fabric with excellent cushioning and breathability as well as excellent elastic recovery by manufacturing a surface fabric and a back fabric using an elastic composite yarn including elastic yarn.

[0008] The double knitted fabric with excellent elastic recovery according to the present invention is a double knitted fabric comprising a surface fabric, a back fabric, and a connecting yarn for connecting the surface fabric and the back fabric, wherein the surface fabric and the back fabric are formed of a warp knitted fabric, the surface fabric has a structure composed of inelastic yarns, the back fabric has a structure in which inelastic yarns and elastic yarns are interwoven together, the connecting yarn for connecting the surface fabric and the back fabric is preferably polyester monofilament, the inelastic yarn is a multifilament or a spun yarn, the multifilament is polyester yarn, polypropylene yarn, nylon yarn, rayon yarn, or acetate yarn, and has a fineness of 100 to 600 denier, and the spun yarn is one or more of cotton, wool, rayon, acetate, polyester, nylon, or polypropylene spun, and has a fineness of 5 to 30, preferably. In addition, the backing fabric may contain elastic yarn in an amount of 30 to 80 wt%, the multifilament has a crimp rate of 5 to 10%, and it is particularly preferable that the connecting yarn has a fineness of 20 to 300 denier.

[0009] The double knitted fabric with excellent elastic recovery according to the present invention has a surface fabric and a back fabric joined by a connecting polyester monofilament yarn, so that the connecting yarn does not protrude to the outside, and thus the surface fabric and the back fabric are joined as one piece of fabric, thereby forming a strong bond. In addition, the air layer formed between the surface fabric and the back fabric provides excellent heat retention and insulation properties, and allows for smooth ventilation, making it comfortable to use. In addition, the back fabric is made of an elastic composite yarn containing an elastic yarn, so that the manufactured double knitted fabric has elasticity and elastic recovery, and can increase strength to provide dimensional stability. Accordingly, there are advantages such as being able to realize a highly functional knitted fabric and maximizing the competitiveness of the double knitted fabric.

[0010] Figure 1 is a schematic diagram of a double knitted fabric with excellent elastic recovery according to the present invention.

[0011] Figure 2 is an enlarged photograph of a double knitted fabric with excellent elastic recovery according to the present invention.

[0012] *Explanation of symbols for major parts of the drawing*

[0013] 10: Surface fabric 20: Back fabric

[0014] 30: Connecting yarn 100: Double knit

[0015] In this application, terms such as “includes,” “has,” or “has” mean features, numbers, steps, components, parts, or combinations thereof described in the specification.

[0016] 20-72024-01-03 It should be understood that the purpose of this document is to specify the existence of one or more other features, numbers, steps, operations, components, parts, or combinations thereof, but does not preclude the possibility of the existence or addition thereof. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and shall not be interpreted in an idealized or overly formal sense, unless explicitly defined in this application.

[0017] Hereinafter, a double knitted fabric (100) having excellent elastic recovery according to the present invention will be described in detail. Figure 1 attached to the present invention is a schematic diagram of a double knitted fabric having excellent elastic recovery according to the present invention, and Figure 2 is an enlarged photograph of a double knitted fabric having excellent elastic recovery according to the present invention.

[0018] The double knitted fabric (100) having excellent elastic recovery according to the present invention is composed of a surface fabric (10), a back fabric (20), and a connecting yarn (30) connecting them, as illustrated in FIGS. 1 and 2. It may be preferable that the surface fabric (10) and the back fabric (20) be composed of warp knitted fabric.

[0019] That is, it may be preferable to use a warp knitted fabric (tricot) in which yarns are supplied in a warp direction and knitted in the form of continuous loops to form the fabric as the surface fabric (10) and the back fabric (20).

[0020] The above-mentioned warp knit fabric has excellent elasticity and does not suffer from the phenomenon of densing, which causes the threads to come loose, unlike Daimaru fabric. It also has the advantage of not suffering from the slip phenomenon (the phenomenon of the warp or weft yarns being pushed out and the fabric puckering) that commonly occurs in low-density fabrics.

[0021] In addition, the surface fabric (10) of the above-mentioned knitted product is characterized by being manufactured structurally strong while maintaining a smooth shape in a warp-like shape by knitting in a honeycomb shape as shown in (a) of Fig. 2. The surface fabric (10) can be manufactured from an inelastic yarn (25), and the inelastic yarn (25) can be a multifilament or spun yarn.

[0022] The above multifilament is polyester yarn, polypropylene yarn, nylon yarn, rayon yarn or acetate yarn, and preferably has a fineness of 100 to 600 denier, and the spun yarn is spun from at least one of cotton, wool, rayon, acetate, polyester, nylon or polypropylene, and preferably has a fineness of 5 to 30.

[0023] The above multifilament refers to a fiber having a continuous length, such as silk or synthetic fiber, and the above spun yarn refers to a yarn produced by spinning single fibers of cotton or wool fiber and synthetic fiber.

[0024] The above-mentioned warp knitted fabric refers to a fabric manufactured by feeding yarns in the warp direction. According to the present invention, the surface fabric (10) and the back fabric (20) are composed of warp knitted fabrics, and at this time, the surface fabric (10) is composed of inelastic yarn (25), and the back fabric (20) can be manufactured by including elastic yarn (22) and inelastic yarn (25) as shown in (b) of FIG. 2. That is, the back fabric (20) can be manufactured by interweaving the same inelastic yarn (25) and elastic yarn (22) that constitute the surface fabric (10). At this time, the elastic yarn (22) can use an elastomeric monofilament having a fineness of 300 to 800 denier.

[0025] The above-mentioned backing fabric (20) may contain 30 to 80 wt% of elastic yarn (22) as a whole, and the fibers interwoven with the elastic yarn (2 2), which is an elastomeric monofilament, as shown in (b) of FIG. 2, may be multifilament or spun yarn.

[0026] When the above-mentioned backing fabric (20) is woven with elastic yarn (22) and multifilament, the elastic yarn (22) may be woven with any one of polyester filament yarn, polypropylene filament yarn, nylon filament yarn, rayon filament yarn, or acetate multifilament yarn.

[0027] According to the present invention, it is particularly preferable that the multifilaments constituting the surface fabric (10) and the back fabric (20) have a crimp rate of 5 to 15%. This is because when the crimp rate of the multifilaments constituting the surface fabric (10) and the back fabric (20) is 5 to 15%, a flat structure with little deformation can be maintained through the compression recovery movement of the warp knitted fabric, and a soft touch and cushioning can be provided.

[0028] The crimp rate of the above filament yarn can be measured by the method described in Method 6.7 B of JIS L-1096 (JISL1096:2020 Raw Material Testing Method for Textiles and Knits). When calculating the crimp rate of the filament yarn constituting the above double knitted fabric, five points are randomly selected, measured, and the average is calculated and used.

[0029] More specifically, by crimping the filament yarn to impart a crimp, it is possible to impart a woven fabric (100) manufactured with a composite material.

[0030] In addition, when the above-mentioned backing fabric (20) is composed of elastic yarn (22) and spun yarn, it may be a spun yarn spun with the single fibers of the elastic yarn (22) and the single fibers of any one of cotton, wool, rayon, acetate, polyester, nylon, or polypropylene. At this time, it may be preferable that the fineness of the spun yarn manufactured as described above is 5 to 30.

[0031] According to the present invention, the connecting thread (30) that connects the surface fabric (10) and the back fabric (20) is connected in a zigzag shape to connect the surface fabric (10) and the back fabric (20), and the connecting thread (30) is combined so that it does not protrude outside the surface fabric (10) and the back fabric (20). By being combined as described above, the surface fabric (10) and the back fabric (20) are combined as one piece of fabric to form a solid bond. It is preferable that the connecting thread (30) that connects the surface fabric (10) and the back fabric (20) use a polyester monofilament yarn having a denier of 20 to 300.

[0032] As described above, the double knitted fabric (100) according to the present invention is manufactured by combining the surface fabric (10) and the back fabric (20) by a connecting yarn (30) which is a polyester monofilament yarn, and the connecting yarn (30) does not protrude to the outside, so that the surface fabric (10) and the back fabric (20) are combined as one piece of fabric and form a strong bond without being separated, thereby reducing the weight of the fabric and providing a high-quality interior fabric.

[0033] In addition, an air layer is formed between the surface fabric (10) and the back fabric (20), which enables the realization of a comfortable, high-functionality knitted fabric with good heat retention and insulation properties while also being breathable, thereby maximizing the external competitiveness of the interior fabric.

[0034] In particular, the back fabric (20) constituting the double knitted fabric (100) according to the present invention is knitted with an elastic composite yarn including an elastic yarn (22), thereby exhibiting elasticity and having the characteristic of being able to add elasticity and elastic recovery to the double knitted fabric (100) as a whole.

[0035] The double knitted fabric (100) according to the present invention can be knitted using a double Raschel machine. That is, the surface fabric (10) is knitted using an inelastic yarn (25) to form a warp knitted fabric, and then goes through a back fabric (20) knitting step to knit a warp knitted fabric forming the back fabric (20) using the elastic composite yarn.

[0036] After knitting the surface fabric (10) and the back fabric (20) through the surface fabric (10) knitting step and the back fabric (20) knitting step as described above, a connecting yarn (30) fastening step is performed to fasten the connecting yarn (30) that fastens the surface fabric (10) and the back fabric (20), so that the product can be manufactured.

[0037] That is, the knitting method of the double knitted fabric (100) according to the present invention supplies an inelastic yarn (25) to a knitting needle (needle) equipped on a double Raschel machine, forms a loop using the inelastic yarn (25), and knits a warp knitted fabric in which the loop is knitted in the horizontal and vertical directions to form a surface fabric (10).

[0038] The main knitting mechanism of the double Raschel machine is a yarn feeding device that performs a feeding motion to supply inelastic yarn (25) or elastic composite yarn to the knitting needle and a knitting needle that performs a knitting motion to form a loop with the inelastic yarn (25) or elastic composite yarn.

[0039] After knitting the surface fabric (10) through the above knitting process, the back fabric (20) is knitted. An elastic composite yarn in which elastic yarn (22) and inelastic yarn (25) are combined is supplied to the knitting needle, a loop is formed using the elastic composite yarn, and the loop is knitted in the horizontal and vertical directions to form a warp knitted fabric to form the back fabric (20).

[0040] After the surface fabric (10) knitting step and the back fabric (20) knitting step are performed as described above, a connecting yarn (30) fastening step is performed to fasten the surface fabric (10) and the back fabric (20) using a connecting yarn (30).

[0041] In the above double knitted fabric (100), the connecting yarn (30) that connects the surface fabric (10) and the back fabric (20) is knitted nearly perpendicular to the surface fabric (10) and the back fabric (20). When the connecting yarn (30) is knitted nearly perpendicularly as described above, the double knitted fabric (100) having a three-dimensional structure can be further stabilized, and the elasticity of the double knitted fabric (100) can be increased.

[0042] The double knitted fabric (100) with excellent elastic recovery manufactured as described above has a surface fabric (10) and a back fabric (20) joined by a connecting yarn (30) of polyester monofilament, so that the connecting yarn (30) does not protrude to the outside, and thus the surface fabric (10) and the back fabric (20) are integrally bonded like a single fabric, thereby forming a strong bond. In addition, the air layer formed between the surface fabric (10) and the back fabric (20) has excellent heat retention and insulation properties. In addition, the back fabric (20) is manufactured with an elastic composite yarn including an elastic yarn (22), so that the manufactured double knitted fabric (100) is manufactured with an elastic composite structure including an elastic yarn (22), thereby having elastic recovery, and thus being able to implement a highly functional knitted fabric, which has the advantage of maximizing the external competitiveness of clothing fabrics.

[0043] Although the present invention has been described with reference to the experimental examples shown in the drawings, these are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other experimental examples are possible from the examples. In addition, those skilled in the art to which the present invention pertains will understand that the present invention can be easily modified into other specific forms without changing the technical spirit or essential characteristics of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive, and the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

Claims

1. A double knitted fabric consisting of a surface fabric, a back fabric, and a connecting yarn that connects the surface fabric and the back fabric. The above surface fabric and back fabric are composed of light knitted fabric, The above surface fabric is a tissue composed of inelastic yarns, The above-mentioned double-sided fabric is a fabric in which inelastic yarns and elastic yarns are interwoven together. A double knitted fabric characterized in that the connecting thread connecting the surface fabric and the back fabric is polyester monofilament.

2. In claim 1, A double knitted fabric characterized in that the above-mentioned inelastic yarn is a multifilament or spun yarn.

3. In claim 1, A double knitted fabric characterized in that the above-mentioned backing fabric contains 30 to 80 wt% of elastic yarn.

4. A surface fabric knitting step for knitting a surface fabric provided on the upper part of the double fabric, A backing fabric knitting step for knitting a backing fabric provided on the lower part of the above double fabric, and A method for manufacturing a double knitted fabric, comprising a connecting thread fastening step of fastening a connecting thread that fastens the surface fabric and the back fabric.

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