Non-overlap sewing method for cut-proof composite fabric and its application

Abstract

The present invention discloses a non-overlapping sewing method for cut-proof composite fabric and its application. The sewing method comprises the following steps: step one, stacking cut-proof fabric pieces and non-cut-proof fabric pieces in parallel, sewing along the positioning line to form a first seam edge and a first combined piece; step two, forming a second seam edge and a second combined piece in the same manner as step one; step three, feeding the first combined piece and the second combined piece horizontally at the same speed on a sewing device at the same time to form a combined seam portion. The present invention compensates for the difference between the fabrics by adjusting the feeding rate between the cut-proof fabric layer and the non-cut-proof fabric layer to ensure that the two can be sewn together evenly to avoid wrinkles or looseness; at the same time, by controlling the feeding speed of the two combined pieces, the multi-layer fabrics of the combined piece can be fed at a uniform speed and evenly, ensuring that the surface of the combined seam portion is flat, without overlapping of the multi-layer fabrics, and avoiding the seam portion from bulging high and irritating the skin.

Description

Technical Field

[0001] The invention relates to the technical field of protective product preparation, and in particular to a non-overlap sewing method for cut-proof and stab-proof composite fabric and application thereof. Background Art

[0002] Nowadays, in daily life, we sometimes encounter personal injury incidents, especially security personnel face many critical situations during their duty. Therefore, the research and development of stab-proof clothing has become a hot topic for enterprises and research institutions.

[0003] The existing stab-proof clothing is hard and thick. Even if the existing technology has broken through the limitations of metal stab-proof clothing and relatively flexible fabric-based stab-proof clothing has appeared, the stab-proof clothing prepared by traditional sewing methods still has the problem of poor wearing comfort. This is mainly due to the large difference in thickness, strength and internal tension between high-performance stab-proof fabrics and non-stab-proof fabrics. During the sewing process, the upper and lower fabrics are not uniform in speed, resulting in a layer of fabric bulging and deformation. The current flat seam sewing technology overlaps the edges of the stab-proof fabric and two or more layers of non-stab-proof fabrics for sewing. This sewing method makes the sewn part thick and hard, the fabric surface is uneven, and the wearing comfort is poor.

[0004] For example, the utility model with patent application number 201721867890.1 discloses a protective clothing for preventing slashing, which includes a top body and trousers; the top body and the trousers are both made of at least one layer of high-molecular polyethylene fabric that is resistant to slashing and knife cutting; but the sewing method adopts an ordinary sewing method, in which two layers of fabric are overlapped and sewn, and then flipped open after sewing, forming four layers of overlapping protruding edge strips at the seams, which are uncomfortable to wear. Summary of the invention

[0005] The purpose of the present invention is to provide a non-overlap sewing method for cut-proof and stab-proof composite fabric and its application in view of the deficiencies in the prior art.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: the first aspect is to provide a method for non-overlapping sewing of cut-proof and stab-resistant composite fabrics, comprising the following steps: step one, stacking the cut-proof and stab-resistant fabric pieces and the non-cut-proof and stab-resistant fabric pieces in parallel, using a positioning line to align one edge between the layers, and fixing the two end points of the positioning line; trimming along the positioning line, cutting off the excess fabric outside the positioning line, and then sewing along the positioning line to form a first seam edge and a first combined piece; wherein the feeding speed ratio of the cut-proof and stab-resistant fabric pieces to the non-cut-proof and stab-resistant fabric pieces is 1:(1.01-1.50); ​​the cut-proof and stab-resistant fabric pieces are 1-12 layers, and the multiple layers are stacked adjacent to each other; step two, similarly, taking the cut-proof and stab-resistant fabric pieces and the non-cut-proof and stab-resistant fabric pieces The process steps of step one are repeated to form a second seam edge and a second combined cut piece; step three, the first combined cut piece and the second combined cut piece are placed parallel and symmetrically on the same plane, and the first seam edge is parallel and aligned with the second seam edge; then the first combined cut piece and the second combined cut piece are fed horizontally at the same speed on the sewing device at the same time, 1-6 upper threads, 1-2 lower threads and 1-2 stitching threads are used, and a combined seam portion is formed after one sewing, and the excess part of the combined seam portion of the first combined cut piece and the second combined cut piece is cut off; wherein, the feeding speed of the first combined cut piece is 0.5-0.9 times of the feeding speed of the cut-resistant fabric cut piece in step one; the width of the combined seam portion formed by the first combined cut piece and the second combined cut piece is 1-20mm.

[0007] Furthermore, the non-cut and stab-resistant fabric piece is a single layer, which is used as an outer fabric piece or an inner fabric piece and is arranged on one side of the cut and stab-resistant fabric piece; or, the non-cut and stab-resistant fabric piece is two layers, which are respectively arranged on both sides of the cut and stab-resistant fabric piece.

[0008] Furthermore, the surface density of the outer fabric is 50-400 g / m 2 ; The surface density of the inner fabric is 20-300g / m 2 .

[0009] Furthermore, the single-layer density of the cut-resistant fabric is 150-700 g / m 2 .

[0010] Furthermore, in the process of forming the first seam allowance and the second seam allowance, the stitch number is set to 3-20 stitches per inch.

[0011] Furthermore, the cut-resistant fabric is woven from one or more of UHMWPE, aramid, basalt fiber, glass fiber, metal fiber, carbon fiber, PBO fiber, polyester, spandex, polypropylene, nylon, cotton fiber, and wool fiber.

[0012] The second aspect is to provide a non-overlapping sewing structure, which is prepared by the non-overlapping sewing method as mentioned above, and includes a first combined panel and a second combined panel, and a combined seam portion formed between the first combined panel and the second combined panel; the width of the combined seam portion is 1-20 mm; the first combined panel and the second combined panel each include a cut-proof and puncture-proof fabric layer and a non-cut-proof and puncture-proof fabric layer, respectively; the cut-proof and puncture-proof fabric layer includes 1-12 layers of cut-proof and puncture-proof fabric panels, and multiple layers are stacked adjacent to each other.

[0013] Furthermore, the non-cut-and-stab-resistant fabric layer is a layer of non-cut-and-stab-resistant fabric pieces, which is arranged on one side of the cut-and-stab-resistant fabric layer as an outer fabric piece or an inner fabric piece; or, the non-cut-and-stab-resistant fabric layer is two layers of non-cut-and-stab-resistant fabric pieces, which are respectively arranged on both sides of the cut-and-stab-resistant fabric layer.

[0014] The third aspect is to provide the application of the non-overlap sewing method as described above in the preparation of cut-resistant clothing.

[0015] Furthermore, the application includes sewing the seams of shoulders, armholes, and underarms of T-shirts, long sleeves, vests, sweatshirts, jackets, waistcoats, and windbreakers, and sewing the crotch and trouser seams of cut-resistant trousers and cut-resistant shorts.

[0016] The present invention adopts the above technical scheme, and has the following technical effects compared with the prior art: the breaking strength of conventional fabrics is 3Cn / Dtex and above, and the thickness is within 0.2mm, while the breaking strength of the cut-proof and puncture-resistant composite fabric is generally 21Cn / Dtex and above, and the thickness is generally above 0.3mm, and even reaches 1-2mm; using the existing process method, there is a problem of multiple layers of overlapping protrusions at the seams where the cut-proof and puncture-resistant fabrics are sewn together with the non-cut-proof and puncture-resistant fabrics.

[0017] The non-overlapping sewing method of the cut-and-stab resistant composite fabric of the present invention has different parameters, such as needle density, sewing thread and sewing speed, from those required by conventional fabrics, based on the different tensions required for sewing two fabrics together. The difference between the fabrics is compensated by adjusting the feeding rate between the cut-and-stab resistant fabric layer and the non-cut-and-stab resistant fabric layer to ensure that the two fabrics can be sewn together evenly and avoid wrinkles or looseness. At the same time, by controlling the feeding speed of the two combined cut pieces, the multi-layer fabrics of the combined cut pieces can be fed at a uniform speed and evenly, ensuring that the surface of the combined seam portion is flat and there is no overlap of 4 or more layers of fabric, thus avoiding the problem that the seam portion bulges high and irritates the skin, or even causes skin redness, swelling, itching and pain and other allergic problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the process of the non-overlap sewing method of the cut-and-stab-resistant composite fabric in Example 1;

[0019] Figure 2 Schematic diagram of the process of the non-overlap sewing method of the cut-and-stab-resistant composite fabric in Example 2;

[0020] Figure 3 Schematic diagram of the process of the non-overlap sewing method of the cut-and-stab-resistant composite fabric in Example 3;

[0021] The accompanying drawings are marked as follows: 1-first outer fabric piece; 2-first outer fabric piece; 3-first cut-proof and stab-proof fabric piece; 4-second cut-proof and stab-proof fabric piece; 5-first inner fabric piece; 6-second inner fabric piece; 7-first seam edge; 8-first combined piece; 9-second seam edge; 10-second combined piece; 11-combined seam portion. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but is not intended to be limiting of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention may be combined with each other without conflict.

[0023] Example 1

[0024] refer to Figure 1 This embodiment provides a method for non-overlap sewing of cut-resistant composite fabrics, wherein the outer fabric has a surface density of 180 g / m 2 Nylon spandex blended fabric, anti-cutting fabric adopts single-layer density of 500g / m 2The blended fabric of ultra-high molecular weight polyethylene, spandex fiber and polyester fiber specifically includes the following steps: step 1, a layer of first cut-proof and stab-proof fabric piece 3 and a layer of first outer fabric piece 1 are stacked in parallel, and a positioning line is used to align an edge between the layers, and the two end points of the positioning line are fixed; trimming is performed along the positioning line, and the excess fabric outside the positioning line is cut off, and then sewing is performed along the positioning line to form a first seam edge 7 and a first combined piece 8; wherein the feeding speed ratio of the first cut-proof and stab-proof fabric piece 3 to the first outer fabric piece 1 is 1:1.2; due to the large deformation and fast travel speed of the outer non-cut-proof and stab-proof fabric, the thickness and strength of the cut-proof and stab-proof fabric are large, The traveling speed is low, and the feeding speed of the first outer fabric piece 1 is set to be higher than that of the first anti-cutting and stab-proof fabric piece 3, so as to avoid the result of fabric bulging and deformation due to the uneven traveling speed of the upper and lower fabrics during the sewing process; Step 2, a layer of the second anti-cutting and stab-proof fabric piece 4 and a layer of the second outer fabric piece 2 are stacked in parallel, and a positioning line is used to align one edge between the layers, and the two end points of the positioning line are fixed; trimming is performed along the positioning line, and the excess fabric outside the positioning line is cut off, and then sewing is performed along the positioning line to form a second seam edge 9 and a second combined piece 10; wherein the feeding speed ratio of the second anti-cutting and stab-proof fabric piece 4 to the second outer fabric piece 2 is 1:1. 2; Since the outer layer of non-cut-and-stab-resistant fabric has a large deformation and a fast travel speed, and the cut-and-stab-resistant fabric has a large thickness and strength and a low travel speed, the second outer layer fabric piece 2 is set to have a larger feeding speed than the second cut-and-stab-resistant fabric piece 4, so as to avoid the upper and lower fabrics from being deformed due to the uneven travel speeds during the sewing process; Step three, the first combined piece 8 and the second combined piece 10 are placed parallel and symmetrically on the same plane, and the first seam edge 7 is aligned parallel to the second seam edge 9; then the first combined piece 8 and the second combined piece 10 are fed horizontally at the same speed on the sewing device at the same time, and 3 surface threads, 2 bottom threads and 2 stitching threads are used to form a combined seam portion after one sewing. 11, and at the same time, the excess part of the combined seam of the first combined piece and the second combined piece is cut off; wherein, the feeding speed of the first combined piece is 0.5 times the feeding speed of the anti-cutting and stab-proof fabric piece in step one, and the low-speed feeding can avoid cracking or bulging at the seam when the two combined pieces are sewn, so that the multi-layer fabric of the combined piece can be fed at a uniform speed and smoothly, ensuring that the surface of the combined seam is smooth; the width of the combined seam 11 formed by the first combined piece and the second combined piece is 10 mm, and the combined seam 11 will not form twice the outer layer of fabric and anti-cutting and stab-proof fabric, nor will there be redundant seam edges, and the combined seam is smooth and neat, and will not bulge to form a high bulging edge.

[0025] In the present embodiment, in the process of forming the first seam allowance 7 and the second seam allowance 9, the stitch number is set to 8 stitches per inch.

[0026] Example 2

[0027] refer to Figure 2 This embodiment provides a method for non-overlap sewing of cut-resistant composite fabrics, wherein the inner layer fabric has a surface density of 120 g / m 2 The polyester lining is made of cut-resistant fabric with a single-layer density of 380g / m 2The blended fabric of ultra-high molecular weight polyethylene fiber, polyester fiber and glass fiber specifically includes the following steps: Step 1, a layer of first cut-proof and stab-proof fabric piece 3 and a layer of first inner layer fabric piece 5 are stacked in parallel, and a positioning line is used to align an edge between the layers, and the two end points of the positioning line are fixed; trimming is performed along the positioning line, and the excess fabric outside the positioning line is cut off, and then sewing is performed along the positioning line to form a first seam edge 7 and a first combined piece 8; wherein the feeding speed ratio of the first cut-proof and stab-proof fabric piece 3 to the first inner layer fabric piece 5 is 1:1.05; due to the large deformation of the inner layer non-cut-proof and stab-proof fabric, the traveling speed is fast, and the cut-proof and stab-proof fabric is thick and strong. , the travel speed is low, and the feeding speed of the first inner layer fabric piece 5 is set to be higher than that of the first anti-cutting and stab-proof fabric piece 3, so as to avoid the result of fabric bulging and deformation due to the uneven travel speed of the upper and lower fabrics during the sewing process; Step 2, a layer of the second anti-cutting and stab-proof fabric piece 4 and a layer of the second inner layer fabric piece are stacked in parallel, and a positioning line is used to align one edge between the layers, and the two end points of the positioning line are fixed; trimming is performed along the positioning line, and the excess fabric outside the positioning line is cut off, and then sewing is performed along the positioning line to form a second seam edge 9 and a second combined piece 10; wherein, the feeding speed ratio of the second anti-cutting and stab-proof fabric piece 4 to the second inner layer fabric piece is 1:1. 05; Since the inner layer non-cut and stab resistant fabric has large deformation and fast travel speed, and the cut and stab resistant fabric has large thickness and strength and slow travel speed, the second inner layer fabric piece is set to have a larger feeding speed than the second cut and stab resistant fabric piece 4, so as to avoid the upper and lower fabrics from being deformed due to uneven travel speeds during sewing; Step three, place the first combined piece 8 and the second combined piece 10 in parallel and symmetrically on the same plane, and align the first seam edge 7 and the second seam edge 9 in parallel; then feed the first combined piece 8 and the second combined piece 10 horizontally at the same speed on the sewing device at the same time, use 2 surface threads, 1 bottom thread and 2 stitching threads, and form a combined seam after one sewing. Part 11, and at the same time, the excess part of the combined seam of the first combined piece and the second combined piece is cut off; wherein, the feeding speed of the first combined piece is 0.6 times the feeding speed of the anti-cutting and stab-proof fabric piece in step 1, and the low-speed feeding can avoid cracking or bulging at the seam when the two combined pieces are sewn, so that the multi-layer fabric of the combined piece can be fed at a uniform speed and smoothly, ensuring that the surface of the combined seam is smooth; the width of the combined seam 11 formed by the first combined piece and the second combined piece is 8 mm, and the combined seam 11 will not form twice the inner layer fabric and anti-cutting and stab-proof fabric, nor will there be redundant seam edges, and the combined seam is smooth and neat, and will not bulge to form a high bulging edge.

[0028] In the present embodiment, in the process of forming the first seam allowance 7 and the second seam allowance 9, the stitch number is set to 10 stitches per inch.

[0029] Example 3

[0030] refer to Figure 3 This embodiment provides a method for non-overlap sewing of cut-resistant composite fabrics, wherein the outer fabric has a surface density of 240 g / m 2 Wool-polyester blended fabric, anti-cutting fabric adopts single-layer density of 320g / m 2 A blended fabric of aramid fiber and polyester fiber, the inner fabric has a surface density of 120g / m 2 The polyester lining comprises the following steps: step 1, sequentially stacking a first outer fabric piece 1, a first cut-and-stab resistant fabric piece 3, and a first inner fabric piece 5 in parallel, using a positioning line to align one edge between the layers, and fixing the two end points of the positioning line; trimming along the positioning line, cutting off the excess fabric outside the positioning line, and then sewing along the positioning line to form a first seam edge 7 and a first combined piece 8; wherein the feeding speed ratio of the first cut-and-stab resistant fabric piece 3 to the first outer fabric piece 1 is 1:1.3; the first cut-and-stab resistant fabric piece 3 is 1:1.3; the first The feeding speed ratio of the cut piece 3 to the first inner fabric cut piece 5 is 1:1.4; Step 2, sequentially stacking a second outer fabric cut piece 2, a second cut-proof and stab-resistant fabric cut piece 4, and a second inner fabric cut piece in parallel, aligning one edge between the layers using a positioning line, and fixing the two end points of the positioning line; trimming along the positioning line, cutting off the excess fabric outside the positioning line, and then sewing along the positioning line to form a second seam edge 9 and a second combined cut piece 10; wherein the feeding speed ratio of the second cut-proof and stab-resistant fabric cut piece 4 to the second outer fabric cut piece 2 is 1 :1.3; the feeding speed ratio of the second anti-cutting and stab-proof fabric piece 4 and the second inner layer fabric piece is 1:1.4; step three, the first combined piece 8 and the second combined piece 10 are placed parallel and symmetrically on the same plane, and the first seam edge 7 and the second seam edge 9 are aligned parallel to each other; then the first combined piece 8 and the second combined piece 10 are fed horizontally at the same speed on the sewing device at the same time, using 2 surface threads, 2 bottom threads and 2 stitching threads, and a combined seam portion 11 is formed after one sewing, and at the same time, the excess part of the combined seam portion of the first combined piece and the second combined piece is cut off; wherein, the first The speed at which a combined piece is fed is 0.8 times the feeding speed of the anti-cutting and stab-proof fabric piece in step one. Feeding at a low speed can avoid cracking or bulging at the seam when the two combined pieces are sewn, so that the multi-layer fabric of the combined piece can be fed at a uniform speed and smoothly, ensuring that the surface of the combined seam is smooth; the width of the combined seam 11 formed by the first combined piece and the second combined piece is 6 mm, and the combined seam 11 will not form twice the outer fabric, inner fabric and anti-cutting fabric, nor will there be any redundant seam edges. The combined seam is smooth and neat, and will not bulge to form a high bulging edge.

[0031] In the present embodiment, in the process of forming the first seam allowance 7 and the second seam allowance 9, the stitch number is set to 6 stitches per inch.

[0032] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the contents of the specification and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for non-overlap sewing of cut-resistant composite fabrics, characterized in that: The method comprises the following steps: step 1, stacking the cut-proof and stab-resistant fabric pieces and the non-cut-proof and stab-resistant fabric pieces in parallel, aligning one edge between the layers using a positioning line, and fixing the two end points of the positioning line; trimming along the positioning line, cutting off the excess fabric outside the positioning line, and then sewing along the positioning line to form a first seam edge and a first combined piece; wherein the feeding speed ratio of the cut-proof and stab-resistant fabric pieces to the non-cut-proof and stab-resistant fabric pieces is 1:(1.01-1.50); ​​the cut-proof and stab-resistant fabric pieces are 1-12 layers, and the multiple layers are stacked adjacently; step 2, similarly, taking the cut-proof and stab-resistant fabric pieces and the non-cut-proof and stab-resistant fabric pieces, repeating the process steps of step 1, forming a second seam edge and a second combination piece. Step three, placing the first combined piece and the second combined piece in parallel and symmetrically on the same plane, and making the first seam edge parallel and aligned with the second seam edge; then feeding the first combined piece and the second combined piece horizontally at the same speed on the sewing device at the same time, using 1-6 surface threads, 1-2 bottom threads and 1-2 stitching threads, forming a combined seam portion after one sewing, and at the same time, the excess part of the combined seam portion of the first combined piece and the second combined piece is cut off; wherein, the feeding speed of the first combined piece is 0.5-0.9 times the feeding speed of the cut-resistant fabric piece in step one; the width of the combined seam portion formed by the first combined piece and the second combined piece is 1-20mm.

2. The method for non-overlap sewing of cut-resistant composite fabric according to claim 1, characterized in that: The non-cut and stab-resistant fabric piece is a single layer, which is arranged on one side of the cut and stab-resistant fabric piece as an outer fabric piece or an inner fabric piece; or, the non-cut and stab-resistant fabric piece is two layers, which are respectively arranged on both sides of the cut and stab-resistant fabric piece.

3. The method for non-overlap sewing of cut-resistant composite fabric according to claim 2, characterized in that: The surface density of the outer fabric is 50-400g / m 2 ; The surface density of the inner fabric is 20-300g / m 2 .

4. The method for non-overlap sewing of cut-resistant composite fabric according to claim 1, characterized in that: The single-layer density of the cut-resistant fabric is 150-700g / m 2 .

5. The method for non-overlap sewing of cut-resistant composite fabric according to claim 1, characterized in that: In the process of forming the first seam allowance and the second seam allowance, the stitch number is set to 3-20 stitches per inch.

6. The method for non-overlap sewing of cut-resistant composite fabric according to claim 4, characterized in that: The cut-resistant fabric is woven from one or more of UHMWPE, aramid, basalt fiber, glass fiber, metal fiber, carbon fiber, PBO fiber, polyester, spandex, polypropylene, nylon, cotton fiber and wool fiber.

7. A non-overlap sewing structure, prepared by the non-overlap sewing method according to any one of claims 1 to 6, characterized in that: The invention comprises a first combined panel and a second combined panel, and a combined seam portion formed between the first combined panel and the second combined panel; the width of the combined seam portion is 1-20 mm; the first combined panel and the second combined panel respectively comprise a cut-proof and stab-proof fabric layer and a non-cut-proof and stab-proof fabric layer; the cut-proof and stab-proof fabric layer comprises 1-12 layers of cut-proof and stab-proof fabric panels, and multiple layers are stacked adjacent to each other.

8. The non-overlapping sewing structure according to claim 7, characterized in that: The non-cut-and-stab-resistant fabric layer is a layer of non-cut-and-stab-resistant fabric pieces, which is arranged on one side of the cut-and-stab-resistant fabric layer as an outer fabric piece or an inner fabric piece; or, the non-cut-and-stab-resistant fabric layer is two layers of non-cut-and-stab-resistant fabric pieces, which are respectively arranged on both sides of the cut-and-stab-resistant fabric layer.

9. Use of the non-overlap sewing method according to any one of claims 1 to 6 in the preparation of cut-resistant clothing.

10. The use according to claim 9, characterized in that: The applications include the sewing of the shoulders, armholes, and underarm seams of T-shirts, long sleeves, vests, sweatshirts, jackets, waistcoats, and windbreakers, as well as the sewing of the crotch and trouser seams of cut-resistant trousers and cut-resistant shorts.

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