Patent Application
20250215624
This application claims priority under 35 U.S.C § 119 to Korean Patent Application No. 10-2024-0000775 filed in the Korean Intellectual Property Office on Jan. 3, 2024, the entire contents of which are hereby incorporated by reference.
The present disclosure relates to a double-knitted fabric with excellent elastic recovery properties, and more specifically, to a double-knitted fabric with excellent elastic recovery properties produced by fixing a front fabric to a back fabric, knitted from an elastic composite yarn including an elastic yarn, by a polyester monofilament yarn as a connecting yarn.
In general, knitted fabrics, unlike woven fabrics, are produced by bending yarns into loops and connecting the loops to form fabric, and include various types of knitted fabrics, such as knitwear and stockings.
Conventionally, double-knitted fabrics, produced by warp knitting using a double Raschel machine and composed of a front fabric, a back fabric, and a connecting yarn connecting them, have been used in applications, including interior design, bedding, medical, nursing, cushioning, industrial materials, and other various applications.
As conventional art relating to double knitted fabrics, Korean Patent Application Publication No. 10-2002-0076313 discloses a double-knitted fabric in which the loop portion of the connecting yarn does not protrude from the surface of the base fabric, so that the surface characteristics (such as texture and touch feeling) of the base fabric material are not damaged, the touch feeling is good, the density of the connecting yarn may be reduced to make the fabric lightweight, the frictional sound may be reduced, and the pressure resistance and elasticity in the thickness direction are also good. In addition, Korea Patent No. 10-0566627 discloses a double-knitted fabric with excellent elasticity, which is produced by circular knitting with a double-sided circular knitting machine using a cotton/PTT/Tencel composite siro-slub spun yarn as a front yarn and a perspiration-absorbing, quick-drying polyester DTY yarn as a back yarn, and a method for producing the same.
The double knitted fabrics according to the conventional art cannot satisfy the purchasing needs of modern consumers who seek diverse patterns and unique textures, because the formation of patterns on the surface is limited. In addition, a double-knitted fabric has been proposed in which two pieces of knitted fabric are bonded to each other by a thermal bonding yarn to provide appropriate insulation, but there is a problem in that the double-knitted fabric has almost no elasticity and elastic recovery properties, making it difficult to provide elasticity to the double-knitted fabric, which causes discomfort to the user.
The present disclosure relates to a double-knitted fabric having excellent elastic recovery properties, and is intended to provide a double-knitted fabric having excellent cushioning and breathability as well as excellent elastic recovery properties by including a front fabric and a back fabric formed of an elastic composite yarn including an elastic yarn.
A double-knitted fabric with excellent elastic recovery properties according to the present disclosure is a double-knitted fabric including a front fabric, a back fabric, and a connecting yarn fixing the front fabric to the back fabric, wherein the front fabric and the back fabric are each composed of a warp-knitted fabric, the front fabric is formed of a non-elastic yarn, the back fabric is formed by interweaving the non-elastic yarn with an elastic yarn, and the connecting yarn fixing the front fabric to the back fabric is a polyester monofilament yarn.
In one embodiment, the non-elastic yarn may be a multifilament or spun yarn, wherein the multifilament yarn may be a polyester yarn, polypropylene yarn, nylon yarn, rayon yarn or acetate yarn, and have a fineness of 100 to 600 denier, and the spun yarn may be a yarn spun from any one or more of cotton, wool, rayon, acetate, polyester, nylon and polypropylene, and may have a fineness of Nm 5 to 30.
In one embodiment, the back fabric may include 30 to 80 wt % of the elastic yarn.
In one embodiment, the multifilament yarn may have a crimp ratio of 5 to 10%, and the connecting yarn may have a fineness of 20 to 300 denier.
In the double-knitted fabric with excellent elastic recovery properties according to the present disclosure, the front fabric and the back fabric are fixed to each other by a polyester monofilament yarn as a connecting yarn, so that the connecting yarn does not protrude to the outside, and the front fabric and the back fabric are firmly fixed to each other to form a single integral structure. In addition, the air layer formed between the front fabric and the back fabric provides excellent thermal retention and insulation properties and smooth breathability, allowing comfortable use. In addition, since the back fabric is formed of an elastic composite yarn including an elastic yarn, the produced double-knitted fabric may have elasticity and elastic recovery properties and be provided with dimensional stability due to its increased strength. Accordingly, the present disclosure has advantages in that it is possible to provide a highly functional double-knitted fabric and maximize the competitiveness of the double-knitted fabric.
In the present specification, it should be understood that terms such as “include” and “have” are intended to denote the existence of mentioned features, numbers, steps, operations, components, parts, or combinations thereof, but do not exclude the probability of existence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. In addition, unless otherwise defined, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those skilled in the art to which the present disclosure pertains. Terms such as those used in general and defined in dictionaries should be interpreted as having meanings identical to those specified in the context of related technology. Unless definitely defined in the present specification, the terms should not be interpreted as having ideal or excessively formative meanings.
Hereinafter, a double-knitted fabric with excellent elastic recovery properties according to the present disclosure will be described in detail with reference to the accompanying drawings.
As shown in
That is, it may be desirable to use, as the front fabric 10 and the back fabric 20, a warp-knitted fabric (tricot) formed by feeding yarns in a warp direction and knitting the yarns in a continuous loop shape.
The warp-knitted fabric has excellent elasticity and does not have a broken yarn, which occurs in Daimaru fabric. It also has the advantage of not having the slip phenomenon (a phenomenon where the warp or weft yarns are pushed out and the fabric crumples) that commonly occurs in low-density fabrics.
In addition, as shown in
In a preferred embodiment, the multifilament yarn may be a polyester yarn, polypropylene yarn, nylon yarn, rayon yarn or acetate yarn, and have a fineness of 100 to 600 denier, and the spun yarn may be a yarn spun from any one or more of cotton, wool, rayon, acetate, polyester, nylon and polypropylene, and may have a fineness of Nm 5 to 30.
The multifilament yarn refers to a fiber having a continuous length, such as silk or synthetic fiber, and the spun yarn refers to a yarn produced by spinning staple fibers of cotton or wool fiber and synthetic fiber.
The warp-knitted fabric refers to a fabric produced by feeding yarns in a warp direction. According to the present disclosure, the front fabric 10 and the back fabric 20 are each composed of a warp-knitted fabric, and in this case, the front fabric 10 may be composed of a non-inelastic yarn 25, and the back fabric 20 may include an elastic yarn 22 and the non-elastic yarn 25, as shown in
The back fabric 20 may include the elastic yarn 22 in an amount of 30 to 80 wt % based on the total weight thereof, and the fiber interwoven with the elastic yarn 22, which is an elastomeric monofilament yarn, as shown in
Where the back fabric 20 is formed by interweaving the elastic yarn 22 which is a multifilament yarn, the elastic yarn 22 may be interwoven with any one of a polyester filament yarn, polypropylene filament yarn, nylon filament yarn, rayon filament yarn, or acetate multifilament yarn.
According to the present disclosure, it is particularly preferable that the multifilament yarn in the front fabric 10 and the back fabric 20 has a crimp ratio of 5 to 15%. This is because when the crimp ratio of the multifilament yarn in the front fabric 10 and the back fabric 20 is 5 to 15%, a flat structure with less deformation may be maintained through the compression and recovery movement of the warp-knitted fabric, and a soft touch and cushioning may be provided.
The crimp ratio of the filament yarn may be measured according to the method described in JIS L-1096 Method 6.7 B (JISL1096: 2020 Test Method for Woven Fabrics and Knitted Fabrics). To calculate the crimp ratio of the filament yarn in the double-knitted fabric, five points are randomly selected and measured, and the average is calculated and used.
More specifically, by crimping the filament yarn to impart a crimp, it is possible to impart an entanglement property to the produced double-knitted fabric 100.
In addition, where the back fabric 20 is composed of the elastic yarn 22 and a spun yarn, it may include a spun yarn produced by spinning the staple fiber of the elastic yarn 22 and the staple fiber of any one of cotton, wool, rayon, acetate, polyester, nylon and polypropylene. In this case, the fineness of the produced spun yarn may preferably be Nm 5 to 30.
According to the present disclosure, the connecting yarn 30 that fixes the front fabric 10 to the back fabric 20 is disposed in a zigzag manner to fix the front fabric 10 to the back fabric 20, and the connecting yarn 30 is disposed so as not to protrude to the outside from the front fabric 10 and the back fabric 20. Accordingly, the front fabric and the back fabric are firmly fixed to each other to form a single integral structure. The connecting yarn 30 fixing the front fabric 10 to the back fabric 20 is preferably a polyester monofilament yarn having a fineness of 20 to 300 denier.
As described above, the double-knitted fabric 100 according to the present disclosure is produced by fixing the front fabric 10 and the back fabric 20 to each other by the connecting yarn 30 which is a polyester monofilament yarn, so that the connecting yarn 30 does not protrude to the outside. Here, the front fabric 10 and the back fabric 20 are firmly fixed to each other to form a single integral structure, and thus the weight of the double-knitted fabric may be reduced and the double-knitted fabric may be used as a high-quality interior fabric.
In addition, since an air layer is formed between the front fabric 10 and the back fabric 20, a highly functional knitted fabric with good heat retention and insulation properties as well as breathability may be realized, thereby maximizing the competitiveness of an interior fabric composed of the double-knitted fabric.
In particular, since the back fabric 20 of the double-knitted fabric 100 according to the present disclosure is formed by knitting an elastic composite yarn including the elastic yarn 22, it exhibits elasticity and has the characteristic of being able to add elasticity and elastic recovery properties to the entire double-knitted fabric 100.
The double-knitted fabric 100 according to the present disclosure may be produced by knitting using a double Raschel machine. That is, the front fabric 10 is formed through a step of knitting the non-elastic yarn 25 to form a warp-knitted fabric, and the back fabric 20 is formed through a step of knitting the elastic composite yarn to form a warp-knitted fabric.
After the front fabric 10 and the back fabric 20 are formed through the front fabric forming step and the back fabric forming step, respectively, as described above, a step of fixing the front fabric 10 and the back fabric 20 to each other by the connecting yarn 30 may be performed, thereby producing the double-knitted fabric.
That is, in the method of producing the double-knitted fabric 100 according to the present disclosure, the non-elastic yarn 25 is fed to knitting needles provided in a double Raschel machine, loops are formed using the non-elastic yarn 25, and the loops are knitted in the horizontal and vertical directions to form a warp-knotted fabric as the front fabric 10.
The major knitting units in the double Raschel machine are a yarn feeder that performs a yarn feeding motion to feed the non-elastic yarn 25 or the elastic composite yarn to the knitting needles, and knitting needles that perform a knitting motion to form loops from the non-elastic yarn 25 or the elastic composite yarn.
After the front fabric 10 is formed by the knitting process, the back fabric 20 is formed by knitting. An elastic composite yarn, which is a composite of the elastic yarn 22 and the non-elastic yarn 25, is fed to the knitting needles, loops are formed using the elastic composite yarn, and the loops are knitted in the horizontal and vertical directions to form a warp-knitted fabric as the back fabric 20.
After the front fabric forming step and the back fabric forming step are formed as described above, a step of fixing the front fabric 10 and the back fabric 20 to each other by the connecting yarn 30 is performed.
In the double-knitted fabric 100, the connecting yarn 30 that fixes the front fabric 10 to the back fabric 20 is disposed nearly perpendicular to the front fabric 10 and the back fabric 20. When the connecting yarn 30 is disposed nearly perpendicularly as described above, the double-knitted fabric 100 having a three-dimensional structure may be further stabilized, and the elasticity of the double-knitted fabric 100 may be increased.
In the double-knitted fabric 100 with excellent elastic recovery properties produced as described above, the front fabric 10 and the back fabric 20 are fixed to each other by the connecting yarn 30 which is a polyester monofilament yarn, so that the connecting yarn 30 does not protrude to the outside, and the front fabric 10 and the back fabric 20 are firmly fixed to each other to form a single integral structure. In addition, the air layer formed between the front fabric 10 and the back fabric 20 provides excellent thermal retention and insulation properties. In addition, since the back fabric 20 is formed of an elastic composite yarn including an elastic yarn, the produced double-knitted fabric 100 has an elastic composite structure including the elastic yarn 22, which provides elastic recovery properties. Accordingly, the present disclosure has advantages in that it is possible to provide a highly functional double-knitted fabric and maximize the competitiveness of the double-knitted fabric.
Although the present disclosure has been described with reference to the embodiments illustrated in the drawings, these embodiments are merely exemplary, and those skilled in the art will appreciate that various modifications and equivalents to the exemplary embodiments are possible. In addition, those skilled in the art to which the present disclosure pertains will appreciate that the present disclosure may be easily modified into other specific forms without departing from the technical idea or essential features of the present disclosure. 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 disclosure should be defined by the technical ideas of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2024-0000775 | Jan 2024 | KR | national |
