TWM650185U - Knitted fabric with concave-convex pattern - Google Patents

Abstract

A knitted fabric is knitted from at least three sets of thermoplastic polyurethane yarns and has a technical face and a technical back opposite to each other. The knitted fabric has a concave-convex pattern region and a flat plane region continuously knitted with the concave-convex pattern region. In the flat plane region, loops in the technical face is disposed corresponding to loops in the technical back in a one-to-one manner. In the concave-convex pattern region, the number of loops in the technical face is less than the number of loops in the technical back, so the concave-convex pattern region is arched toward the technical back with respect to the flat plane region.

Description

Knitted fabrics with concave and convex patterns

The present invention generally relates to a knitted fabric. Specifically, the present invention relates to a knitted fabric with a concave and convex pattern that is naturally formed after knitting.

Conventionally, when a concave-convex pattern is to be formed on a knitted fabric, a mold with a predetermined pattern is usually used to heat-press the plane of the knitted fabric, thereby producing concave-convex areas corresponding to the predetermined pattern on the plane of the knitted fabric. However, this method of forming concave and convex patterns by hot pressing not only requires additional mold opening, which significantly increases the cost, but also requires additional man-hours for processing procedures, which reduces production capacity and increases the possibility of product defects.

One purpose of the present invention is to provide a knitted fabric with a designed organizational structure and a naturally formed concave and convex pattern after the knitting is completed.

Another object of the present invention is to provide a knitted fabric whose structural structure is composed of thermoplastic polyurethane (TPU) yarns and can be completely reused to improve environmental friendliness.

In one embodiment, the present invention provides a knitted fabric woven from at least three groups of thermoplastic polyurethane (TPU) yarns. The knitted fabric has opposite technical front surfaces and technical back surfaces and includes a concave and convex pattern area and a concave and convex pattern area. The flat area that continues the knitting, where: in the flat area, the yarn loops on the technical front and the yarn loops on the technical back are arranged in a one-to-one correspondence; in the concave-convex pattern area, the number of yarn loops contained on the technical front is less than that on the technical back. The number of yarn turns makes the concave and convex pattern area arch toward the back of the technology relative to the flat area.

In one embodiment, at least three groups of TPU yarns include a first group of TPU yarns, a second group of TPU yarns, and a third group of TPU yarns, and the first group of TPU yarns, the second group of TPU yarns, and the third group of TPU yarns All TPU yarns are TPU single-component yarns.

In one embodiment, the first group of TPU yarns, the second group of TPU yarns and the third group of TPU yarns are each selected from the group consisting of TPU air textured yarn, TPU pre-oriented yarn, TPU false twisted yarn and combinations thereof one or more yarns in a group.

In one embodiment, the first group of TPU yarns, the second group of TPU yarns, and the third group of TPU yarns include the same yarn material.

In one embodiment, the first group of TPU yarns and the second group of TPU yarns have the same number of yarns, and the number of yarns of the first group of TPU yarns and the second group of TPU yarns is greater than that of the third group of TPU yarns. number of yarns.

In one embodiment, the number of yarns in the first group of TPU yarns and the second group of TPU yarns is more than 2, and the number of yarns in the third group of TPU yarns is more than 1 and less than the first group of TPU yarns. And at least 1 piece of the second group of TPU yarns.

In one embodiment, the second set of TPU yarns are used only to form the technical back of the knitted fabric.

In one embodiment, in the concave-convex pattern area, the yarn loops on the technical front are composed of the third group of TPU yarns, and the yarn loops on the technical back are alternately composed of the first group of TPU yarns and the second group of TPU yarns.

In one embodiment, the tightness of the concave-convex pattern area is 1.4 to 1.8 times that of the flat area.

In one embodiment, in the concave-convex pattern area, the yarn loops on the technical front are arranged at intervals corresponding to the yarn loops on the technical back, so that concave portions appear on the technical front and convex portions are formed on the technical back.

In one embodiment, in the knitted fabric, the vertical projected area of the flat area is larger than the vertical projected area of the concave-convex pattern area.

In one embodiment, in the concave and convex pattern area, the yarn loops on the technical front and the yarn loops on the technical back are woven without interconnection to form a hollow portion.

In one embodiment, in the concave-convex pattern area, the number of yarn turns included in the technical front is Nf, and the number of yarn turns included in the technical back is Nb, and (1/2xNb)-1≦Nf≦(1/2xNb)+1 , Nf and Nb are both positive integers.

In one embodiment, the knitted fabric is a knitted shoe upper.

Compared with the conventional technology, the new knitted fabric controls the number of yarn turns on the technical front in the concave-convex pattern area to be less than the number of yarn turns on the technical back, so that the knitted fabric has a naturally formed concave-convex pattern after the knitting is completed. , there is no need to open a mold and heat press it into a concave-convex shape, and there is no need to use yarn materials with different thermal shrinkage rates to weave and then heat it to shrink it into a concave-convex shape. Furthermore, the use of at least three sets of TPU yarns in this new type of knitted fabric can reduce the problems of fabric surface defects caused by different tensions, different frictional resistances or different elastic factors that may be caused by using yarns of different materials, and can effectively improve the quality. rate and increase production capacity.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Throughout this specification, the same reference numbers refer to the same elements. It will be understood that, although the terms "first," "second," "third," etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, and/or sections or parts thereof shall not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a "first element", "component", "region", "layer" or "section" discussed below could be termed a second element, component, region, layer or section without departing from the teachings herein.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms including "at least one" unless the content clearly dictates otherwise. "or" means "and/or". As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. It will also be understood that when used in this specification, the terms "comprises" and/or "includes" designate the presence of stated features, regions, integers, steps, operations, elements and/or components but do not exclude one or more The presence or addition of other features, regions, steps, operations, elements, parts and/or combinations thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries shall be construed to have meanings consistent with their meanings in the context of the relevant technology and the present invention, and shall not be construed as idealistic or excessive Formal meaning, unless expressly defined as such herein.

In order to thoroughly understand the present invention, the details of the steps and structure will be explained. Well-known knitting production methods and detailed steps are not described in detail to avoid unnecessary limitations of the present invention.

The present invention provides a knitted fabric, which can be used to manufacture clothing, shoes or bags. The knitted fabric of the present invention can be knitted by a knitting machine (not shown in the figure), where the knitting machine can be, for example, a circular knitting machine or a flat knitting machine. In one embodiment, the new knitted fabric is knitted by a two-needle bed flat knitting machine, and after weaving is completed, it is a knitted fabric with naturally formed concave and convex patterns. For example, the new type of knitted fabric can be knitted by a Cam two-needle bed flat knitting machine that can change the rail path and drive the knitting needle movement.

Figure 1A is a schematic diagram of a knitted fabric according to an embodiment of the present invention. Figure 1B is an enlarged three-dimensional schematic diagram of partial area A of Figure 1A. Figure 2 is a partial cross-sectional schematic diagram of the present invention along the tangent line B-B of Figure 1A. As shown in Figures 1A, 1B and 2, in one embodiment, the knitted fabric 10 of the present invention is preferably a knitted upper, but is not limited thereto. The new knitted fabric 10 can be applied to any fabric requiring concave and convex patterns. The new knitted fabric 10 is preferably woven from at least three groups of thermoplastic polyurethane (TPU) yarns (described in detail later). The knitted fabric 10 has an opposite technical front 10a and a technical back 10b, and the knitted fabric 10 includes a concave and convex pattern area 120 and a planar area 110 knitted continuously with the concave and convex pattern area 120. In the plane area 110, the yarn loops of the technical front side 10a1 and the yarn loops of the technical back side 10b1 are arranged in a one-to-one correspondence. In the concave-convex pattern area 120, the technical front side 10a2 contains less yarn turns than the technical back side 10b2, so that the concave-convex pattern area 120 is arched toward the technical back side 10b relative to the flat area 110.

Specifically, the technical front 10a is the part formed by the needle beds in front of the two-needle-bar flat knitting machine, and the technical front 10a is composed of the technical front 10a1 located in the flat area 110 and the technical front 10a2 located in the concave and convex pattern area 120. The technical back 10b is the part formed by the needle beds corresponding to the two needle beds of the flat knitting machine, and the technical back 10b is composed of the technical back 10b1 located in the flat area 110 and the technical back 10b2 located in the concave and convex pattern area 120. Furthermore, as shown in Figure 1A, in the knitted fabric 10, the vertical projected area of the flat area 110 is larger than the vertical projected area of the concave and convex pattern area 120, so that the flat area 110 can be regarded as an area corresponding to the entire knitted fabric 10, and the concave and convex pattern The textured area 120 can be viewed as a pattern present in the planar area 110 .

As shown in Figure 2, "In the plane area 110, the yarn loops of the technical front 10a1 and the yarn loops of the technical back 10b1 are arranged in a one-to-one correspondence" means that in the plane area 110, the number of yarn loops of the technical front 10a1 and the technical back side 10a1 are arranged in a one-to-one correspondence. The number of yarn loops on the back 10b1 is essentially the same (only 8 are shown in the figure) or differs by ±1 yarn loop, so that the yarn loops on the technical front 10a1 (such as f1~f8) are the same as the yarn loops on the technical back 10b1 (such as b1~ b8) is set alternately before and after. Thereby, the planar area 110 of the knitted fabric 10 has a relatively flat technical front 10a1 and a technical back 10b1.

As shown in Figure 2, in the concave and convex pattern area 120, the yarn loops on the technical front 10a2 are arranged at intervals corresponding to the yarn loops on the technical back 10a1, so that concave portions appear on the technical front 10a2 and convex portions are formed on the technical back 10b2. For example, in the concave-convex pattern area 120, the yarn loops (for example, c1'~c5') of the technical front 10a2 are knitted with alternate needles on the front needle bed, and the yarn loops (such as c1~c9) of the technical back 10b2 are knitted on the back needles. The bed is woven continuously so that the technical front 10a2 contains approximately 1/2 the number of yarn turns as the technical back 10b2. Specifically, when the number of yarn turns included in the technical front 10a2 is Nf, and the number of yarn turns included in the technical back 10b2 is Nb, the relationship between Nf and Nb should satisfy (1/2xNb)-1≦Nf≦(1/2xNb )+1, where Nf and Nb are both positive integers. For example, in the embodiment of Figure 2, the number of yarn turns included in the technical back 10b2 is 9 (for example, c1~c9, that is, Nb is 9), so (1/2x9)-1≦Nf≦(1/2x9 )+1 (that is, 3.5≦Nf≦5.5), so that the number of yarn turns Nf on the technical front 10a2 can be 4 or 5, and Nf is 5 in this embodiment. From another point of view, in the concave-convex pattern area 120, the number of yarn turns Nf on the technical front side 10a2 may be 1/2 of the number of yarn turns Nb on the technical back side 10b2 plus the number of shared yarn turns. For example, in the embodiment of Figure 2, the number of yarn loops included in the technical back 10b2 is 9 (such as c1~c9, that is, Nb is 9), and a common yarn loop (such as b5) is added, so that the technical front The number of yarn turns Nf of 10a2 is 5. Since the number of yarn turns on the technical front 10a2 is approximately 1/2 of the number of yarn turns on the technical back 10b2, the technical front 10a2 forms a concave part, and the technical back 10b2 forms a convex convex part, causing the concave and convex pattern areas 120 to face each other. Distinctive textural features arching in the planar area 110 toward the technical backside 10b.

In addition, the knitted fabric 10 can have different tightnesses in the flat area 110 and the concave-convex pattern area 120, and the tightness of the concave-convex pattern area 120 is preferably greater than the tightness of the flat area 110, so that the concave-convex pattern area 120 is relatively The flat area 110 shrinks, further causing the concave-convex pattern area 120 to arch relative to the flat area 110 toward the direction of the technical backside 10b. In one embodiment, the tightness of the concave-convex pattern area 120 is preferably 1.4 to 1.8 times the tightness of the flat area 110 . In one embodiment, the tightness of the flat area 110 and the concave-convex pattern area 120 can be adjusted by controlling the yarn feeding speed of the knitted fabric 10 . For example, when the yarn feeding rate in the flat area 110 is 600 meters per minute (600 m/min), the yarn feeding rate in the concave and convex pattern area 120 can be controlled to about 333.33~428.57 m/min, so that the yarn is The concave and convex pattern areas 120 are all stretched. Thereby, after weaving, due to the restoring force of the yarn, the concave-convex pattern area 120 shrinks relative to the planar area 110, and then the concave-convex pattern area 120 arches relative to the planar area 110 toward the direction of the technical back 10b to form a similar shape. The semicircular arch shape makes the knitted fabric have a more obvious concave and convex pattern effect.

In addition, as shown in Figure 2, in the concave and convex pattern area 120, the yarn loops (for example, c1'~c5') on the technical front 10a2 and the yarn loops (for example, c1~c9) on the technical back 10b2 are not connected to each other, forming a hollow Department S. Specifically, in addition to the shared yarn loop b5 or the continuation yarn loops f4 and c1 between the plane area 110 and the concave-convex pattern area 120, the front yarn loop in the concave-convex pattern area 120 (for example, the yarn loop c1' of the technical front 10a2 ~c5') and the rear yarn loops (such as the yarn loops c1~c9 of the technical back 10b2) are not connected to each other, so that the technical front 10a2 and the technical back 10b2 form a hollow part without yarn interweaving along the direction in which the yarn loops are arranged. S.

The knitted fabric 10 may be woven from at least three groups of TPU yarns. In this embodiment, at least three groups of TPU yarns include a first group of TPU yarns 11, a second group of TPU yarns 12, and a third group of TPU yarns 13 (shown in Figures 3 and 4). The first group of TPU yarns 11, the second group of TPU yarns 12, and the third group of TPU yarns 13 are preferably TPU single-component yarns, so that the structure of the knitted fabric 10 all uses 100% TPU material yarns. Lines can be completely recycled and reused. For example, the first group of TPU yarns 11 , the second group of TPU yarns 12 and the third group of TPU yarns 13 can each be independently selected from TPU/ATY (air textured yarn), TPU One or more yarns in the group consisting of pre-oriented raw yarn (TPU/POY (pre-oriented yarn)), TPU false twisted yarn (TPU/DTY (draw textured yarn)) and their combinations. In one embodiment, the first group of TPU yarns 11 and the second group of TPU yarns 12 preferably have the same number of yarns, and the number of yarns of the first group of TPU yarns 11 and the second group of TPU yarns 12 is greater. The number of yarns is preferably greater than that of the third group of TPU yarns 13. For example, the number of yarns in the first group of TPU yarns 11 and the second group of TPU yarns 12 is more than 2, and the number of yarns in the third group of TPU yarns 13 is more than 1 and less than that of the first group of TPU. The yarn 11 and the second group of TPU yarns 12 are at least one, but are not limited to this. In other embodiments, the number of TPU yarns in each group can be adjusted according to actual applications, so that the planar area 110 of the knitted fabric 10 has a relatively uniform thickness.

TPU air textured yarn is a yarn that uses air jet technology to intertwine filament bundles to form irregular twisted filament loops, giving the filament bundles a fluffy terry-like shape. TPU air textured yarn has the properties of both filament and staple fiber yarns, has good fluffiness and a cotton-like feel, while retaining the advantages and functionality of man-made fibers, such as: fluffiness, softness, It has better water conductivity, color brightness maintenance, glossiness, air permeability and other aspects than the raw silk before deformation. The fineness is about 10-15% higher than that of the original filament, but the strength is reduced by about 40% because only a small part of the monofilament can bear the tensile force of the entire filament bundle after air deformation. TPU air textured yarn not only has high stretchability, but also has excellent wear resistance. Due to the surface arc structure of TPU air textured yarn, TPU air textured yarn can be processed at a speed higher than 6000 needles/min without melting or breakage. In other words, considering the cotton-like feel, maintaining the functionality and variety of man-made fibers, choosing TPU air textured yarn has more advantages. In one embodiment, the quality of the TPU air-textured yarn is preferably 150D (denier) to 550D, and more preferably 500D.

TPU pre-oriented raw yarn refers to the incompletely drawn chemical fiber filament obtained by high-speed spinning with an orientation degree between unoriented yarn and drawn yarn. Compared with undrawn yarn, TPU pre-oriented raw yarn has a certain degree of orientation and good stability, and is often used as a special yarn for drawn false-twisted textured yarn (DTY). The high-speed spinning speed is usually 3000-6000 m/min, and the winding yarn with a spinning speed of 4000 m/min or less has a higher degree of orientation. TPU pre-oriented strands have high pre-orientation, stable properties, good mechanical properties, high uniformity, and good processing properties. In one embodiment, the quality of the TPU pre-oriented strands is preferably 130D~250D, and more preferably 200D.

TPU false-twisted yarn is made by using TPU pre-oriented raw yarn as raw yarn, which is stretched and false-twisted. TPU false twisted yarn usually has a certain degree of elasticity and shrinkage, and is also called TPU stretch yarn. In one embodiment, the quality of the TPU false twisted yarn is preferably 150D~350D, and more preferably 165D.

In one embodiment, the first group of TPU yarns 11 , the second group of TPU yarns 12 and the third group of TPU yarns 13 may include the same yarn material. For example, the three groups of TPU yarns are all TPU air textured yarns, TPU Pre-oriented raw yarn, or TPU false twisted yarn, but not limited to this. In other embodiments, the first group of TPU yarns 11 , the second group of TPU yarns 12 and the third group of TPU yarns 13 may include different or partially identical yarn materials. For example, the three groups of TPU yarns may be TPU air textured yarns, TPU pre-oriented raw yarns and TPU false twisted yarns, or the first group of TPU yarns 11 and the second group of TPU yarns 12 may each include more than two TPU yarns produced by the same or different processes, and the TPU yarns of the third group of TPU yarns 13 may be the same as or different from the yarns included in the first group of TPU yarns 11 and the second group of TPU yarns 12 .

Hereinafter, an embodiment of the new knitted fabric 10 knitted by a two-needle bed flat knitting machine will be described with reference to Figures 3 and 4 in conjunction with Figures 1B and 2 . As shown in FIG. 3 , a two-needle bed flat knitting machine includes a front needle bed FB located in the front and a rear needle bed BB located in the rear. The front needle bed FB and the rear needle bed BB each have a corresponding plurality of knitting needles, and the knitting needles of the front needle bed FB and the knitting needles of the rear needle bed BB are arranged in one-to-one correspondence alternately back and forth. In addition, corresponding to the three sets of TPU yarns (such as 11, 12, 13), the flat knitting machine preferably has three corners (such as F1, F2, F3), and each corner (or yarn feeder) can be Change the path of the convex rail and drive the knitting needle movement for knitting. It should be noted here that the weaving sequence P1 to P8 shown in Figures 3 and 4 correspond to the weaving direction indicated by the arrow in Figure 1B.

As shown in Figure 3, during the first knitting pass P1, weaving from right to left, using the first sequence corner F1, the first group of TPU yarns 11 are fed to each knitting needle of the front needle bed FB to form a yarn loop. , and at the same time hang the first group of TPU yarns 11 on the rear needle bed BB in a tuck manner, that is, the first group of TPU yarns 11 knit two needles on the front needle bed FB, and then knit two needles on the rear needle bed BB. Knit on the front needle bed FB and the back needle bed BB by hanging one stitch. Then, using the second sequence corner F2, the second group of TPU yarns 12 are fed into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops. It should be noted here that the knitting needle position where the second group of TPU yarns 12 forms a yarn loop on the rear needle bed BB is the position where the first group of TPU yarns 11 does not hang the needle. Then, using the third sequence corner F3, the third group of TPU yarns 13 are fed into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops. It should be noted here that the knitting needle position where the third group of TPU yarns 13 forms a yarn loop on the rear needle bed BB is the position where the first group of TPU yarns 11 hangs the needles (that is, the second group of TPU yarns 12 are on the rear needle bed BB. No yarn loops (missed knitting needle positions) are formed. Thereby, the plurality of knitting needles on the front needle bed FB have multiple yarn loops formed by the first group of TPU yarns 11, and the plurality of knitting needles on the rear needle bed BB The needle has a plurality of yarn loops formed by the second group of TPU yarns 12 and the third group of TPU yarns 13 alternately in sequence, wherein the plurality of yarn loops on the front needle bed FB (technical front side 10a1) and the rear needle bed BB (technical back side) The plural yarn loops in 10b1) are arranged one-to-one in front and back to form a row of continuous planar areas 110.

During the second knitting pass P2, weave from right to left, using the first sequence corner F1, in the plane area 110, feed the first group of TPU yarns 11 to each knitting needle of the front needle bed FB to form a yarn loop , and at the same time, hang the first group of TPU yarns 11 on the rear needle bed BB every other needle. That is, the first group of TPU yarns 11 are knitted with two needles on the front needle bed FB, and then one needle is hung on the rear needle bed BB, and the knitting is repeated on the front needle bed FB and the rear needle bed BB. It should be noted here that during this knitting pass, the knitting needle position of the first group of TPU yarns 11 on the rear needle bed BB is that the first group of TPU yarns 11 did not hang on the needles during the previous knitting pass (for example, P1). The position is the knitting needle position where the second group of TPU yarns 12 formed a yarn loop on the rear needle bed BB in the previous knitting pass. When the knitting continues from the flat area 110 to the concave-convex pattern area 120, the first sequence corner F1 feeds the first group of TPU yarns 11 into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops. Specifically, in the concave-convex pattern area 120, the knitting needle positions where the first group of TPU yarns 11 form yarn loops are the knitting needle positions where the second group of TPU yarns 12 form yarn loops during the previous weaving pass (for example, P1). , that is, the knitting needle position where the third group of TPU yarns 13 did not form a yarn loop during the previous weaving pass. When the knitting continues from the concave-convex pattern area 120 to the flat area 110, repeat the method of knitting two stitches before the flat area 110 and then hanging one stitch to knit the first group of TPU yarns 11, so that the second group of TPU yarns in the previous weaving process Thread 12 performs hanging stitches at the knitting needle position where the yarn loop is formed on the rear needle bed BB.

Then, using the second sequence corner F2, the second group of TPU yarns 12 are fed into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops. It should be noted here that the knitting needle position where the second group of TPU yarns 12 forms a yarn loop on the rear needle bed BB is the position where the first group of TPU yarns 11 does not hang the needle (in the plane area) or is not formed during this knitting process. The position of the yarn loop (in the concave-convex pattern area), that is, the knitting needle position where the second group of TPU yarns 12 did not form a yarn loop on the rear needle bed BB in the previous weaving pass.

Next, using the third sequence corner F3, in the plane area 110, the third group of TPU yarns 13 are fed into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops. It should be noted here that during this knitting process, the knitting needle position where the third group of TPU yarns 13 forms a yarn loop on the rear needle bed BB is the position where the first group of TPU yarns 11 hangs the needle, that is, in the previous knitting process. The third group of TPU yarns 13 are at the knitting needle position where yarn loops are not formed on the rear needle bed BB. When the knitting continues from the flat area 110 to the concave-convex pattern area 120, the third sequence corner F3 feeds the third group of TPU yarns 13 into the front needle bed FB in an alternate needle knitting manner to form a plurality of yarn loops. When the weaving continues from the concave and convex pattern area 120 to the flat area 110, the third sequence corner F3 feeds the third group of TPU yarns 13 into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops, and their positions correspond to In the previous knitting pass (for example, P1), the third group of TPU yarns 13 did not form a knitting needle position of the yarn loop on the rear needle bed BB. Thereby, the concave and convex pattern area 120 is sandwiched between the planar area 110 . In the plane area 110, the plurality of knitting needles on the front needle bed FB have a plurality of yarn loops formed by the first group of TPU yarns 11 (ie, the technical front 10a1), while the plurality of knitting needles on the rear needle bed BB have a plurality of yarn loops formed by the second group of TPU yarns 11. The TPU yarn 12 and the third group of TPU yarns 13 alternately form a plurality of yarn loops (ie, the technical back side 10b1). In the concave-convex pattern area 120, the plurality of knitting needles on the front needle bed FB have yarn loops knitted by the third group of TPU yarns 13 at alternate needles (ie, the technical front 10a2), while the plurality of knitting needles on the rear needle bed BB have yarn loops knitted by the third group of TPU yarns 13. The first group of TPU yarns 11 and the second group of TPU yarns 12 alternately form a plurality of yarn loops (ie, the technical back side 10b2). In the concave-convex pattern area 120, the number of yarn turns on the front needle bed FB (technical front surface 10a2) is less than the number of yarn turns on the rear needle bed BB (technical back surface 10b2), for example, about 1/1 of the number of yarn turns on the rear needle bed BB. 2.

During the third weaving pass P3, weave from right to left, using the first corner F1, and feed the first group of TPU yarns 11 into the front needle bed FB and the rear needle bed in a knitting manner similar to the second weaving pass P2. BB. It should be noted here that in the plane area 110, the knitting needle positions of the first group of TPU yarns 11 on the rear needle bed BB are the knitting needle positions where the needles were not hung during the previous knitting pass (for example, P2), and in the concave and convex In the pattern area 120, the position of the needle yarn loop on the rear needle bed BB is the knitting needle position where no yarn loop was formed during the previous knitting pass (for example, P2). Then, using the second sequence corner F2, the second group of TPU yarns 12 are fed into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops. The knitting needle position where the second group of TPU yarns 12 forms a yarn loop on the rear needle bed BB is the knitting needle position where the second group of TPU yarns 12 does not form a yarn loop on the rear needle bed BB in the previous knitting pass (for example, P2). Then, the third set of TPU yarns 13 is fed into the front needle bed FB and the rear needle bed BB using the third sequence corner F3 in a knitting manner similar to the second weaving pass P2. It should be noted here that in the plane area 110, the knitting needle positions where the third group of TPU yarns 13 form yarn loops on the rear needle bed BB are the knitting needle positions where no yarn loops were formed during the previous knitting pass (for example, P2), and In the concave-convex pattern area 120, the position separated from the knitting yarn loop on the front needle bed FB is the knitting needle position where no yarn loop is formed during the previous knitting pass (for example, P2). It should be noted here that in the concave and convex pattern area 120, the number of yarn loops of the first group of TPU yarns 11 knitted on the rear needle bed BB corresponds to the number of yarn loops of the third group of TPU yarns 13 knitted on the front needle bed FB. The number, and the number of yarn turns changes according to the actual concave and convex pattern (for example, it is increased in this embodiment).

During the fourth weaving pass P4, weave from left to right, using the first sequence corner F1, and feed the first group of TPU yarns 11 into the front needle bed FB and the rear needle bed in a knitting manner similar to the second weaving pass P2. BB. It should be noted here that in the plane area 110, the knitting needle positions of the first group of TPU yarns 11 hanging on the rear needle bed BB are the knitting needle positions where the needles were not hung during the previous knitting pass (for example, P3), and in the concave and convex In the pattern area 120, the position of the rear needle bed BB separated from the knitting yarn loop is the knitting needle position where no yarn loop was formed during the previous knitting pass (for example, P3). Then, using the second sequence corner F2, the second group of TPU yarns 12 are fed into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops. The knitting needle position where the second group of TPU yarns 12 forms a yarn loop on the rear needle bed BB is the knitting needle position where the second group of TPU yarns 12 does not form a yarn loop on the rear needle bed BB in the previous knitting pass (for example, P3). Then, the third set of TPU yarns 13 is fed into the front needle bed FB and the rear needle bed BB using the third sequence corner F3 in a knitting manner similar to the second weaving pass P2. It should be noted here that in the plane area 110, the knitting needle positions where the third group of TPU yarns 13 form yarn loops on the rear needle bed BB are the knitting needle positions where no yarn loops were formed during the previous knitting pass (for example, P3), and In the concave-convex pattern area 120, the position separated from the knitting yarn loop on the front needle bed FB is the knitting needle position where no yarn loop is formed during the previous knitting pass (for example, P3). In the concave and convex pattern area 120, the yarn loops of the front needle bed FB (ie, the technical front side 10a2) are composed of the third group of TPU yarns 13, and the yarn loops of the rear needle bed BB (ie, the technical back side 10b2) are composed of the first group of TPU yarns 13. The TPU yarns 11 and the second group of TPU yarns 12 are alternately formed. In the concave-convex pattern area 120, the number of yarn loops of the first group of TPU yarns 11 knitted on the rear needle bed BB corresponds to the number of yarn loops of the third group of TPU yarns 13 knitted on the front needle bed FB, and the yarn loops The number varies according to the actual concave and convex pattern (for example, it increases in this embodiment).

Please refer to Figure 4. During the fifth weaving process P5, the sixth weaving process P6 and the seventh weaving process P7, the first-order mountain horn F1, the second-order mountain corner F2 and the third-order mountain horn F3 are used in a similar manner as described above. In the knitting method of the weaving process (such as P2), the first group of TPU yarns 11 and the third group of TPU yarns 13 are fed into the front needle bed FB and the rear needle bed BB respectively, and the second group of TPU yarns 12 are only fed into The rear needle bed BB completes the three-row knitting of the knitted fabric 10 . In the plane area 110 of each column, the knitting needles of the front needle bed FB have a plurality of yarn loops formed by the first group of TPU yarns 11, while the knitting needles of the rear needle bed BB have a plurality of knitting needles formed by the second group of TPU yarns. 12 and the third group of TPU yarns 13 alternately form a plurality of yarn loops in sequence, in which the plurality of yarn loops on the front needle bed FB (technical front side 10a1) and the plurality of yarn loops on the rear needle bed BB (technical back side 10b1) are one-to-one Corresponding settings before and after. In the concave and convex pattern areas 120 of each column, the plurality of knitting needles on the front needle bed FB have yarn loops knitted by the third group of TPU yarns 13 every other needle (ie, the technical front 10a2), and the plurality of knitting needles on the rear needle bed BB There are a plurality of yarn loops formed by the first group of TPU yarns 11 and the second group of TPU yarns 12 in sequence (ie, the technical back side 10b2), in which the number of yarn loops on the front needle bed FB (technical front side 10a2) is less than that on the back side. The number of yarn turns on the needle bed BB (technical back surface 10b2) is, for example, approximately 1/2 of the number of yarn turns on the rear needle bed BB.

During the eighth weaving pass P8, corresponding to the U-shaped local area A in Figure 1A, and also referring to Figure 1B, there can be a plurality of concave and convex pattern areas 120 in the same weaving row. Specifically, the first weaving pass P1 corresponds to the flat area 110 without concave and convex patterns, the second weaving pass P2 to the seventh weaving pass P7 correspond to the bottom of the U-shaped concave and convex pattern, and the eighth weaving pass P8 corresponds to the U-shaped concave and convex pattern. There are two arms spaced apart on both sides of the bottom of the pattern. In other words, during the eighth weaving pass P8, the first group of TPU yarns 11 are fed into the front needle bed FB and the rear needle bed BB in a knitting manner similar to the aforementioned weaving pass (P2), so that in the previous weaving pass (for example, In the concave and convex pattern area 120 formed in P7) (for example, the middle section of the concave and convex pattern area), the knitting of the flat area is performed (i.e., two stitches are knitted in the front and one stitch is hung), and then the concave and convex pattern formed in the previous knitting process (for example, P7) is Two concave and convex pattern areas 120 separated by the planar area 110 are formed on both sides of the pattern area 120 . The second sequence corner F2 feeds the second group of TPU yarns 12 into the rear needle bed BB in an alternate needle knitting manner to form a plurality of yarn loops, and the second group of TPU yarns 12 forms a knitting of yarn loops on the rear needle bed BB. The needle position is the knitting needle position where the second group of TPU yarns 12 did not form a yarn loop on the rear needle bed BB in the previous knitting pass (for example, P7). Then, the third set of TPU yarns 13 is fed into the front needle bed FB and the rear needle bed BB using the third sequence corner F3 in a knitting manner similar to the second weaving pass P2. In the plane area 110, the knitting needle positions where the third group of TPU yarns 13 form yarn loops on the rear needle bed BB are the knitting needle positions where yarn loops were not formed during the previous knitting pass (for example, P7), and the positions of the yarn loops formed in the two concave and convex patterns are In the grain area 120, the position of the knitted yarn loop on the front needle bed FB is the knitting needle position where the third group of TPU yarns 13 did not form a yarn loop during the previous knitting pass (for example, P7). In each concave-convex pattern area 120, the number of yarn turns of the first group of TPU yarns 11 knitted at intervals on the rear needle bed BB corresponds to the number of yarn turns knitted by the third group of TPU yarns 13 on the front needle bed FB, and The number of yarn turns changes according to the actual concave and convex pattern (for example, it is reduced in this embodiment). Furthermore, in each of the concave and convex pattern areas 120, the number of yarn turns on the front needle bed FB (technical front surface 10a2) is still less than the number of yarn turns on the rear needle bed BB (technical back surface 10b2), for example, about the number of yarn turns on the rear needle bed BB. 1/2 of the number of yarn turns.

It can be seen from the above weaving processes P1 to P8 that the knitted fabric 10 of the present invention only uses simple stitches, misses and tucks when weaving, and does not need to use plating loops. Weaving methods such as (plating), transfer (transfer), and shaker (needle bed movement (racking)) can complete obvious concave and convex patterns. Therefore, weaving can be very fast and smooth, effectively achieving the effect of improving yield and increasing production capacity.

In the knitted fabric 10, the second group of TPU yarns 12 are only used to form the technical back 10b, that is, the second group of TPU yarns 12 are only knitted on the back needle bed BB. From another point of view, as shown in Figure 2, the first group of TPU yarns 11 in the planar area 110 structure has a plurality of "planar area front yarn loops (such as f1 ~ f8)", and a plurality of "planar area back hanging yarns (such as 111)" formed by the rear needle bed BB every 1 knitting needle half knitting, the plane area back hanging yarn is between the plane area front yarn circles (such as f1~f8) between. The second group of TPU yarns 12 in the planar area 110 structure has a plurality of "shared back yarn loops (such as b2, b4, b6, b8)" formed by the back needle bed BB knitted at intervals of 1 knitting needle, and a plurality of shared back yarn loops. The "shared back floating yarn (such as 121)" is not woven between the back yarn circles, where the shared back yarn circles (such as b2, b4, b6, b8) are between the back hanging yarns in the flat area. The third group of TPU yarns 13 in the planar area 110 structure has a plurality of "planar area rear yarn loops (such as b1, b3, b5, b7)" formed by the rear needle bed BB every 1 knitting needle, and a plurality of between "Floating yarn at the back of the plane area (for example, 131)" that is not woven between the back yarn loops in the plane area, in which the back yarn loops in the plane area (such as b1, b3, b5, b7) overlap with the back hanging yarn in the plane area.

The first group of TPU yarns 11 in the texture of the concave-convex pattern area 120 has a plurality of "convex rear yarn loops (such as c1, c3, c5, c7, c9)" formed by knitting the rear needle bed BB at intervals of 1 knitting needle. , and a plurality of "floating yarns at the back of the convex area (such as 112)" that are not woven between the convex back yarn circles. The second group of TPU yarns 12 in the texture of the concave-convex pattern area 120 has a plurality of "shared rear yarn loops (such as c2, c4, c6, c8)" formed by the rear needle bed BB knitted at intervals of 1 knitting needle, and a plurality of intermediate The "shared back floating yarn (for example, 122)" is not knitted between the shared back yarn loops, where the shared back yarn loop is 1 knitting needle away from the raised back yarn loops of the first group of TPU yarns 11. The third group of TPU yarns 13 in the texture of the concave-convex pattern area 120 has a plurality of "concave front yarn loops (such as c1'~c5')" formed by knitting the front needle bed FB at intervals of 1 knitting needle, and a plurality of between "Front floating yarn in concave and convex areas (for example, 132)" that is not woven between the concave front yarn loops, where the concave front yarn loops are between the convex rear yarn loops of the first group of TPU yarns 11 (such as c1, c3, c5 , c7, c9) and the shared rear yarn loops of the second group of TPU yarns 12 (for example, c2, c4, c6, c8).

The number of concave front yarn loops in the fully woven yarn loops in the concave and convex pattern area 120 is approximately half of the number of convex rear yarn loops plus the shared rear yarn loops, and the concave front yarn loops are not the same as the convex rear yarn loops. The shared rear yarn loops are connected and knitted to form the hollow portion S. In the concave-convex pattern area 120, since the number of yarn loops on the technical front side 10a2 is approximately 1/2 of the number of yarn loops on the technical back side 10b2, the technical front side 10a2 forms a concave and the technical back side 10b2 forms a raised obvious texture feature.

In addition, the number of front yarn loops (for example, f1~f8) in the plane area that are fully woven into yarn loops in the plane area 110 structure is the same as the number of shared rear yarn loops (such as b2, b4, b6, b8) plus the rear yarn loops in the plane area (such as The total number of b1, b3, b5, b7) is the same, and the front yarn loops in the flat area are hung with the yarn in the back plane area, and the raised rear yarn loops and the common rear yarn loops are interconnected and knitted. Since the number of yarn turns 10a1 on the technical front side of the planar area 110 is the same as the number of yarn turns 10b1 on the technical backside 10b1, the planar area 110 is made even and smooth, and they are interconnected and knitted by hanging yarns behind the planar area. Therefore, the yarn hanging behind the planar area makes the planar area 110 obvious. Characteristics of thickening.

Table 1 shows the measurement data of TPU single-component yarn and PET (polyethylene terephthalate) high elastic yarn for general shoes.

Table 1 DIN 53835-2 & ASTM D3412-2001 standards abbreviation Material Specifications Elongation% Reply rate % Friction coefficient A yarn TPU / ATY (air textured yarn) 500d/96f 122.1 86 0.128 B yarn TPU / POY (pre-oriented yarn) 200d/48f 161.7 67 0.083 D yarn TPU / DTY (false twisted yarn) 165d/72f 90.3 76 0.092 E yarn (high elastic yarn) PET / DTY (false twisted yarn) 300d/96f 26.1 31 0.057

TPU yarn is a fiber material made of thermoplastic polyurethane elastomer through spinning process. TPU yarn is wear-resistant, twist-resistant, tear-resistant, solvent-resistant, flame-retardant, easy to shape (sustainable and durable), environmentally friendly and recyclable. It can produce high-strength and high-wear-resistant fabrics through knitting methods. In the textile industry, TPU yarn can also be processed to change its properties, fineness and color. It can be used in shoe uppers, backpacks, shoulder straps, carpets, table mats, seats and other fabrics. Since this new type uses TPU single-component yarn without core material, it has high elasticity, high toughness and good softness, and importantly, it has the characteristics of shape memory and solid shape. Therefore, the knitted fabric (or shoe upper) woven by this new type of TPU yarn not only has better wear resistance than PET fabric, but also takes advantage of the better shape memory solidity (recovery rate) and The characteristic of its friction coefficient enables the concave and convex pattern after woven fabric (or shoe upper) to have better concave and convex effect and better shaping effect than PET fabric.

Tables 2 and 3 show the measurement data of fabrics woven into fabrics using TPU single-component yarn to knit the new knitted fabric 10 and general PET high elastic yarns. The three groups of yarns all use the same material. Fabric A: is A This new knitted fabric is knitted by yarn (TPU / ATY); B fabric: it is the new knitted fabric knitted by B yarn (TPU / POY); D fabric: it is knitted by D yarn (TPU / DTY) This new type of knitted fabric is knitted; E fabric: a general shoe fabric woven from E yarn (PET/ATY).

Table 2 ASTM D2594 standard constant elongation (fabric - recovery rate (Elastic Recovery) = (L1-L2) / ( L1- L0)) Parameters\Fabric A fabric B fabric D fabric E fabric Weft width (mm) 420 432 428 448 Warp length (mm) 125 126 125 123 Weft length after sewing yarn loop (mm) 210 224 224 224 (L0) When no external force is applied 210 216 214 224 Original straight length after turning into yarn loop (mm) (L1) Fixed elongation 30% 273 281 278 291 Length value after stretching (mm) (L2) Fixed elongation 30% (remove external force after 2 hours) 216 236 226 253 Length value measured after 60 seconds (mm) Fixed elongation 30% (remove external force after 2 hours) 90.5 (%) 69.2 (%) 81.3 (%) 56.8 (%) Recovery rate after 60 seconds (%) (L2) Fixed elongation 30% (remove external force after 2 hours) 215 234 225 252 Length value measured after 0.5hr (mm) Fixed elongation 30% (remove external force after 2 hours) 92.1 (%) 72.3 (%) 82.8 (%) 58.2 (%) Response rate after 0.5 hours (%) (L2) Fixed elongation 30% (remove external force after 2 hours) 214 234 224 252 Length value measured after 1 hour (mm) Fixed elongation 30% (remove external force after 2 hours) 93.7 (%) 72.3 (%) 84.4 (%) 58.2 (%) Response rate after 1 hour (%)

table 3

It can be seen from Table 2 and Table 3 that the performance of the new knitted fabric 10 (i.e. A fabric, B fabric, D fabric) in fabric recovery rate and fabric elongation is better than that of the conventional fabric (i.e. E fabric).

Compared with the conventional technology, the new knitted fabric controls the difference in the number of yarn turns on the technical front and the technical back in the concave and convex pattern area, and has a naturally formed concave and convex pattern after the knitting is completed, without the need to open a mold for hot pressing. The process of forming a concave-convex shape does not require the use of yarn materials with different thermal shrinkage rates to weave and then heat them to shrink them into a concave-convex shape. In addition, the new knitted fabric can also be ironed at low temperature for a short period of time to further shape the knitted fabric (or shoe upper) that already has a concave and convex pattern. Furthermore, the use of at least three sets of TPU yarns in this new type of knitted fabric can reduce the problems of fabric surface defects caused by different tensions, different frictional resistances or different elastic factors that may be caused by using yarns of different materials, and can effectively improve the quality. rate and increase production capacity.

The present invention has been described by the above-mentioned embodiments. However, the above-mentioned embodiments are only for illustrative purposes and not for limitation. Those skilled in the art will appreciate that the embodiments specifically described herein may have other modifications to the illustrated embodiments without departing from the spirit of the invention. Therefore, the scope of the present invention also covers such modifications and is limited only by the scope of the appended patent application.

10: Knitted fabrics 10a, 10a1, 10a2: Technical front 10b, 10b1, 10b2: Technical backside 11: The first set of TPU yarn 111: Hang yarn behind the flat area 112: Floating yarn behind concave and convex area 12: The second set of TPU yarn 121, 122: Shared back floating yarn 13: The third group of TPU yarn 131: Floating yarn behind flat area 132: Floating yarn in front of concave and convex area 110: Plane area 120: Concave-convex pattern area A: local area S: hollow area BB: Back needle bed FB: Front needle bed b1~b8, f1~f8, c1~c9, c1'~c5': yarn circle

Figure 1A is a schematic diagram of a knitted fabric according to an embodiment of the present invention. FIG. 1B is an enlarged perspective view of partial area A of FIG. 1A . Figure 2 is a partial cross-sectional schematic diagram of the present invention along the tangent line B-B in Figure 1A. Figures 3 and 4 are schematic diagrams of the weaving process of the partial area A in Figure 1B of the present invention.

10a, 10a1, 10a2: Technical front

10b, 10b1, 10b2: Technical backside

110: Plane area

111: Hang yarn behind the flat area

112: Floating yarn behind concave and convex area

121, 122: Shared back floating yarn

131: Floating yarn behind flat area

132: Floating yarn in front of concave and convex area

S: hollow area

120: Concave-convex pattern area

b1~b8, f1~f8, c1~c9, c1'~c5': yarn circle

Claims (14)

A knitted fabric woven from at least three groups of thermoplastic polyurethane (TPU) yarns. The knitted fabric has opposite technical fronts and technical backs and includes a concave-convex pattern area and a planar area woven continuously with the concave-convex pattern area, wherein: In the plane area, the yarn loops on the front side of the technology and the yarn loops on the back side of the technology are arranged in a one-to-one correspondence; and In the embossed pattern area, the technical front side contains less yarn turns than the technical back side, so that the embossed pattern area is arched toward the technical back side relative to the planar area. The knitted fabric of claim 1, wherein the at least three groups of TPU yarns include a first group of TPU yarns, a second group of TPU yarns and a third group of TPU yarns, and the first group of TPU yarns, the The second group of TPU yarns and the third group of TPU yarns are both TPU single-component yarns. The knitted fabric of claim 2, wherein the first group of TPU yarns, the second group of TPU yarns and the third group of TPU yarns are each selected from the group consisting of TPU air-textured yarns, TPU pre-oriented yarns, One or more yarns in the group consisting of TPU false twisted yarns and their combinations. The knitted fabric of claim 3, wherein the first group of TPU yarns, the second group of TPU yarns and the third group of TPU yarns comprise the same yarn material. The knitted fabric of claim 2, wherein the first group of TPU yarns and the second group of TPU yarns have the same number of yarns, and the number of the first group of TPU yarns and the second group of TPU yarns is The number of yarns is greater than the number of yarns of the third group of TPU yarns. The knitted fabric as described in claim 5, wherein the number of yarns of the first group of TPU yarns and the second group of TPU yarns is more than 2, and the number of yarns of the third group of TPU yarns is 1 More than and less than at least 1 of the first group of TPU yarns and the second group of TPU yarns. The knitted fabric of claim 2, wherein the second group of TPU yarns is only used to form the technical back of the knitted fabric. The knitted fabric as claimed in claim 7, wherein in the concave-convex pattern area, the yarn loops on the technical front side are composed of the third group of TPU yarns and the yarn loops on the technical back side are respectively composed of the first group of TPU yarns. and the second group of TPU yarns are alternately formed. The knitted fabric according to claim 1, wherein the tightness of the concave-convex pattern area is 1.4 to 1.8 times that of the flat area. The knitted fabric according to claim 1, wherein in the concave-convex pattern area, the yarn loops on the technical front are arranged at intervals corresponding to the yarn loops on the technical back, so that a concave portion appears on the technical front and a convex portion is formed on the technical back. department. The knitted fabric according to claim 1, wherein in the knitted fabric, the vertical projected area of the flat area is greater than the vertical projected area of the concave and convex pattern area. The knitted fabric according to claim 1, wherein in the concave-convex pattern area, the yarn loops on the technical front and the yarn loops on the technical back are not connected to each other and are woven to form a hollow portion. The knitted fabric as described in claim 1, wherein in the concave-convex pattern area, the number of yarn turns included in the technical front is Nf, and the number of yarn turns included in the technical back is Nb, and (1/2xNb)- 1≦Nf≦(1/2xNb)+1, Nf and Nb are both positive integers. The knitted fabric according to claim 1, wherein the knitted fabric is a knitted upper.

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