A method for manufacturing PLA and degradable polyester interwoven hook and loop fastener

Abstract

The present invention discloses a method for manufacturing a PLA and degradable polyester interwoven hook-and-loop fastener, comprising the steps of designing the fastener structure and parameters, steaming the raw materials, weaving, baking the fastener, gluing, and cutting the hooks. The fastener structure and parameter design are as follows: a hook-and-loop fastener structure is used, a degradable polyester filament woven fastener base is used, PLA monofilament woven fastener hooks are used, and PLA multifilament woven fastener loops are used. The fastener manufactured by the present invention has a peel strength of ≥1.0 N / cm and a shear strength of ≥6.0 N / cm. 2 , disposable, 100% biodegradable, no need to be incinerated. Can be used for fasteners such as clothing, shoes, hats, bedding, tools, instruments, and equipment for medical and rehabilitation use.

Description

Technical Field

[0001] The invention relates to a method for manufacturing a hook and loop fastener, in particular to a PLA and degradable polyester interwoven hook and loop fastener on the same surface and a method for manufacturing the same. Background Art

[0002] Most commercially available Velcro is made of nylon or polyester, which offers excellent fastening properties. However, it is non-biodegradable. Medical Velcro, in particular, is non-biodegradable and must be incinerated after use, causing secondary pollution.

[0003] Previously, the inventors also designed PLA Velcro, but due to the lack of raw material specifications, the terry fibers were too fine, and they collapsed under heat and pressure during the processing. The strength of the Velcro produced did not meet the requirements and had low use value. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a method for manufacturing a PLA and degradable polyester interwoven hook-and-loop fastener.

[0005] This and other objects of the present invention will be further elucidated by the following detailed description.

[0006] The present invention provides a method for manufacturing a PLA and degradable polyester interwoven hook-and-loop same-side fastener, comprising the steps of designing a fastener structure and parameters, steaming raw materials, weaving, baking the fastener, gluing, and cutting hooks. The fastener structure and parameter design are as follows: a hook-and-loop same-side fastener structure is adopted, a base structure of the fastener is woven from degradable polyester filaments, hooks are woven from PLA monofilaments, and loops are woven from PLA multifilaments.

[0007] In the manufacturing method of the PLA and degradable polyester interwoven hook-and-loop same-side hook-and-loop fastener of the present invention, the raw materials are steamed as follows: before weaving the fastener: the 280-320D / 14-16f PLA multifilament used in the terry warp yarn needs to be twisted with 80-120 twists / m to improve the yarn cohesion strength, and steamed at 95-100°C for 30-40 minutes to eliminate internal stress, eliminate yarn relaxation and back twist, and reduce the weaving breakage rate; the 150-180D / 74-84f degradable polyester used in the ground warp needs to be twisted with 80-120 twists / m to improve the yarn cohesion strength, reduce warp yarn fuzz, unclear opening, and weaving difficulties.

[0008] In the manufacturing method of the PLA and degradable polyester interwoven hook-and-loop same-face hook and loop fastener of the present invention, the hook and loop fastener weaving process is as follows: the terry warp yarn is 280-320D / 14-16f PLA multifilament, the hook and loop warp yarn is 0.16-0.18mm PLA monofilament, the ground warp yarn is 150-180D / 74-84f degradable polyester, and the weft yarn is 150-180D / 74-84f degradable polyester;

[0009] Warp arrangement: 1 wool warp: 4-5 ground warps, 1 hook warp: 4-5 ground warps, warp density 9-11 warps / 2.54cm, weft density 45-47 wefts / 2.54cm;

[0010] A looping piece is set at the place where there is hook warp or hair warp. The height of the hair warp looping piece is 2.2-2.4mm, and the height of the hook warp looping piece is 1.6-1.8mm. The fabric blank is warped and woven;

[0011] During weaving, the infrared heating setting tube is heated to a temperature of 200-300°C and is 25-30mm away from the fabric plane.

[0012] In the manufacturing method of the PLA and degradable polyester interwoven hook and loop same-side hook and loop fastener of the present invention, in order to improve the insufficient elasticity of the PLA fiber, the loop arcs become pointed when the hooks and loops are formed, and the loop rods are easily collapsed under pressure, the woven hook and loop fastener is baked at 120-130°C for 3-5 minutes, so that the hooks and loops shrink at high temperature, the loop arcs become rounded, the loop rods become shorter and harder, and the texture of the fabric surface is clear and smooth, thereby improving the appearance and hook rate of the hook and loop fastener and improving the peel strength and shear strength of the hook and loop fastener.

[0013] In the method for manufacturing the PLA and degradable polyester interwoven hook and loop fastener of the present invention, the gluing step is: preparing a halogen-free, heavy metal-free coating adhesive, and coating the fastener. The mass ratio of the coating adhesive formula is:

[0014] Polyurethane resin YC-180KA 100

[0015] MEK 30-60

[0016] Crosslinking agent CA-800D 15-35

[0017] Heat and mix evenly;

[0018] The coating amount of the coating glue on the back side of the hook and loop fastener is 120-170g / m 2 , dry the coated Velcro at 90-115℃ for 2-6 minutes to lock the Velcro structure and solidify it into one, so that there will be no burrs when cutting and it will not fall apart when used.

[0019] The polyurethane resin YC-180KA and cross-linking agent CA-800D can be purchased from Gaoding Fine Chemicals (Kunshan) Co., Ltd.

[0020] Preferably, in the method for manufacturing the PLA and degradable polyester interwoven hook and loop fastener of the present invention, the gluing step is: preparing a halogen-free, heavy metal-free coating adhesive, coating the fastener, and the coating adhesive formula mass ratio is:

[0021] Polyurethane resin YC-180KA 100

[0022] MEK 35-55

[0023] Crosslinking agent CA-800D 20-30

[0024] Heat and mix evenly;

[0025] The coating amount of the coating glue on the back side of the hook and loop fastener is 130-160g / m 2 , dry the coated Velcro at 95-105℃ for 2-5min.

[0026] In the method for manufacturing the PLA and degradable polyester interwoven hook and loop on the same side of the hook and loop fastener of the present invention, the hook and loop of the hook and loop fastener monofilament is cut at about 2 / 3 of the height of the loop column to form the hook and loop fastener hooks.

[0027] The present invention provides a method for manufacturing a PLA and degradable polyester interwoven hook-and-hair hook fastener, comprising the steps of hook-and-hair fastener structure and parameter design, raw material steaming, weaving, hook-and-hair fastener baking, gluing, and hook cutting.

[0028] The structure and parameter design of the hook and loop fastener are as follows: a hook and loop fastener structure with the same surface is adopted, a degradable polyester filament woven hook and loop fastener is made of PLA monofilament, and a PLA multifilament woven loop fastener is made of PLA monofilament.

[0029] The raw material steaming process is as follows: before weaving the hook and loop fastener, the 280-320D / 14-16f PLA multifilament yarn used in the terry warp needs to be twisted with 80-120 twists / m to improve the yarn cohesion strength, and steamed at 95-100℃ for 30-40 minutes; the 150-180D / 74-84f biodegradable polyester yarn used in the ground warp needs to be twisted with 80-120 twists / m;

[0030] The weaving process of the hook and loop fastener is as follows: the terry warp yarn is 280-320D / 14-16f PLA multifilament, the hook and loop warp yarn is 0.16-0.18mm PLA monofilament, the ground warp yarn is 150-180D / 74-84f biodegradable polyester, and the weft yarn is 150-180D / 74-84f biodegradable polyester.

[0031] Warp arrangement: 1 wool warp: 4-5 ground warps, 1 hook warp: 4-5 ground warps, warp density 9-11 warps / 2.54cm, weft density 45-47 wefts / 2.54cm;

[0032] A looping piece is set at the place where there is hook warp or hair warp. The height of the hair warp looping piece is 2.2-2.4mm, and the height of the hook warp looping piece is 1.6-1.8mm. The fabric blank is warped and woven;

[0033] During weaving, the infrared heating setting tube is heated to 200-300℃ and is 25-30mm away from the fabric plane;

[0034] The hook and loop fastener baking steps are as follows: the hook and loop fastener is baked at 120-130°C for 3-5 minutes after weaving;

[0035] The gluing steps are: prepare a halogen-free and heavy metal-free coating adhesive, and coat the hook and loop fastener. The coating adhesive formula mass ratio is:

[0036] Polyurethane resin YC-180KA 100

[0037] MEK 30-60

[0038] Crosslinking agent CA-800D 15-35

[0039] Heat and mix evenly;

[0040] The coating amount of the coating glue on the back side of the hook and loop fastener is 120-170g / m 2 , dry the coated hook and loop fastener at 90-115℃ for 2-6min;

[0041] Cut the Velcro monofilament hook loop at about 2 / 3 of the height of the loop column to form a Velcro hook.

[0042] The PLA and degradable polyester interwoven hook and loop fastener manufactured by the method of the present invention has a peel strength of ≥1.0N / cm and a shear strength of ≥6.0N / cm 2 (Ordinary hook and loop nylon and polyester hook and loop fastener enterprise standard: peel strength ≥ 0.7N / cm, shear strength ≥ 5.0N / cm 2 , no relevant national standards), single-use, 100% biodegradable, no need for incineration. Can be used for medical and rehabilitation clothing, shoes, hats, bedding, tools, instruments, equipment and other fasteners.

[0043] The product of the present invention adopts a hook-and-loop structure on the same side of the hook and loop fastener, a degradable polyester filament woven hook and loop fastener fabric, PLA monofilament woven hook fastener, and PLA multifilament woven loop fastener, and is manufactured through processes such as fabric structure and parameter design, raw material steaming, weaving, baking, coating and finishing, and hook cutting. The resulting hook and loop fastener has a certain stiffness because the single fibers of the loop fastener are relatively coarse. In addition, the same side of the fabric has both coarse monofilament hooks and loops and coarse multifilament loops. During heat treatment, the loops do not collapse, resulting in good strength and complete degradability. The hook and loop fastener can meet the requirements of medical and rehabilitation clothing, shoes and hats, bedding, tools, instruments, and other fasteners.

[0044] In the present invention, unless otherwise specified, all raw materials and equipment can be purchased from the market, and the preparation methods of various finishing agents all adopt conventional methods in the relevant field. DETAILED DESCRIPTION

[0045] The following specific examples are provided to further illustrate the present invention, but they are not intended to limit the present invention.

[0046] Example 1

[0047] The invention discloses a method for manufacturing a PLA and degradable polyester interwoven hook-and-loop fastener. The fastener structure is designed as follows: a hook-and-loop fastener structure is adopted, a degradable polyester filament woven fastener ground structure, PLA monofilament woven fastener hooks, and PLA multifilament woven fastener loops.

[0048] Before weaving the hook and loop fastener, the 2800D / 14f PLA multifilament terry warp yarn is twisted at 80 twists / m to improve yarn cohesion and steamed at 95°C for 40 minutes to eliminate internal stress, eliminate yarn relaxation and backtwist, and reduce end-of-weaving breakage. The 150D / 74f biodegradable polyester ground warp yarn is twisted at 80 twists / m to improve yarn cohesion and reduce warp fuzz, unclear openings, and other weaving difficulties.

[0049] The weaving process of the Velcro is: terry warp yarn 280D / 14f PLA multifilament, hook and loop warp yarn 0.16mm PLA monofilament, ground warp yarn 150D / 74f biodegradable polyester, and weft yarn 150D / 74f biodegradable polyester.

[0050] Warp arrangement: 1 wool warp: 4 ground warps, 1 hook warp: 4 ground warps, warp density 9 warps / 2.54cm, weft density 45 wefts / 2.54cm.

[0051] Looping pieces are set at the places where there are hook warps or hair warps. The height of the hair warp looping piece is 2.2mm, and the height of the hook warp looping piece is 1.6mm. The fabric blank is completed through warping and weaving.

[0052] During weaving, the infrared heating setting tube is heated to 200°C and is 25mm away from the fabric plane.

[0053] In order to improve the insufficient elasticity of PLA fibers, the loops become pointed when the hooks and loops are formed, and the loop rods are easily collapsed under pressure. The Velcro is baked at 120℃ for 5 minutes, so that the hooks and loops shrink at high temperature, the loops become round, the loop rods become shorter and harder, and the surface texture of the fabric is clear and smooth, which improves the appearance and hook rate of the Velcro, and improves the peel strength and shear strength of the Velcro.

[0054] A halogen-free and heavy metal-free coating adhesive is prepared to coat the Velcro. The coating adhesive formula is: polyurethane resin YC-180KA, butanone MEK, and crosslinking agent CA-800D are heated and mixed evenly in a weight percentage ratio of 100:30:15.

[0055] The coating amount of the coating glue on the back side of the hook and loop fastener is 120g / m 2 , dry the coated Velcro at 90℃ for 6 minutes to lock the Velcro structure and consolidate it into one, so that there will be no burrs when cutting and it will not fall apart when used.

[0056] Finally, cut the Velcro monofilament hook at about 2 / 3 of the height of the loop column to form a Velcro hook.

[0057] Example 2

[0058] In the manufacturing method of the PLA and degradable polyester interwoven hook and loop on the same side hook and loop fastener of the present invention, the hook and loop fastener structure is designed as follows: a hook and loop on the same side hook and loop fastener structure is adopted, the ground structure of the hook and loop fastener is woven from degradable polyester filaments, the hooks of the hook and loop fastener are woven from PLA monofilaments, and the loops of the hook and loop fastener are woven from PLA multifilaments.

[0059] Before weaving the hook and loop fastener, the 320D / 16f PLA multifilament terry warp yarn is twisted at 120 twists / m to improve yarn cohesion and steamed at 100°C for 30 minutes to eliminate internal stress, eliminate yarn relaxation and backtwist, and reduce end-of-weaving breakage. The 180D / 84f biodegradable polyester ground warp yarn is twisted at 120 twists / m to reduce warp fuzz, unclear openings, and weaving difficulties.

[0060] The weaving process of the Velcro is: terry warp yarn 320D / 16f PLA multifilament, hook and loop warp yarn 0.18mm PLA monofilament, ground warp yarn 180D / 84f biodegradable polyester, and weft yarn 180D / 84f biodegradable polyester.

[0061] Warp arrangement: 1 wool warp: 5 ground warps, 1 hook warp: 5 ground warps, warp density 11 warps / 2.54cm, weft density 47 wefts / 2.54cm.

[0062] Looping pieces are set at the places where there are hook warps or hair warps. The height of the hair warp looping piece is 2.4mm, and the height of the hook warp looping piece is 1.8mm. The fabric blank is completed through warping and weaving.

[0063] During weaving, the infrared heating setting tube is heated to 300°C and is 30mm away from the fabric plane.

[0064] In order to improve the insufficient elasticity of PLA fibers, the loops become pointed when the hooks and loops are formed, and the loop rods are easily collapsed under pressure. The Velcro is baked at 130°C for 3 minutes, so that the hooks and loops shrink at high temperature, the loops become round, the loop rods become shorter and harder, and the surface texture of the fabric is clear and smooth, which improves the appearance and hook rate of the Velcro, and improves the peel strength and shear strength of the Velcro.

[0065] A halogen-free and heavy metal-free coating adhesive is prepared to coat the Velcro. The coating adhesive formula is: polyurethane resin YC-180KA, butanone MEK, and crosslinking agent CA-800D are heated and mixed evenly in a weight percentage ratio of 100:60:35.

[0066] The coating amount of the coating glue on the back side of the hook and loop fastener is 170g / m 2 , dry the coated Velcro at 115℃ for 2 minutes to lock the Velcro structure and solidify it into one, so that there will be no burrs when cutting and it will not fall apart when used.

[0067] Finally, cut the Velcro monofilament hook at about 2 / 3 of the height of the loop column to form a Velcro hook.

[0068] Example 3

[0069] In the manufacturing method of the PLA and degradable polyester interwoven hook and loop on the same side hook and loop fastener of the present invention, the hook and loop fastener structure is designed as follows: a hook and loop on the same side hook and loop fastener structure is adopted, the ground structure of the hook and loop fastener is woven from degradable polyester filaments, the hooks of the hook and loop fastener are woven from PLA monofilaments, and the loops of the hook and loop fastener are woven from PLA multifilaments.

[0070] Before weaving the hook and loop fastener, the 300D / 15f PLA multifilament terry warp yarn needs to be twisted 100 twists / m to improve yarn cohesion and steamed at 98°C for 35 minutes to eliminate internal stress, eliminate yarn relaxation and backtwist, and reduce end-of-weaving breakage. The 160D / 80f biodegradable polyester ground warp needs to be twisted 100 twists / m to improve yarn cohesion and reduce warp fuzz, unclear openings, and other weaving difficulties.

[0071] The weaving process of the Velcro is: terry warp yarn 300D / 15f PLA multifilament, hook and loop warp yarn 0.17mm PLA monofilament, ground warp yarn 160D / 80f biodegradable polyester, and weft yarn 160D / 80f biodegradable polyester.

[0072] Warp arrangement: 1 hair warp: 4 ground warps, 1 hook warp: 4 ground warps, warp density 10 warps / 2.54cm, weft density 46 wefts / 2.54cm.

[0073] A looping piece is set at the place where there is hook warp or hair warp. The height of the hair warp looping piece is 2.3mm, and the height of the hook warp looping piece is 1.7mm. The fabric blank is completed through warping and weaving.

[0074] During weaving, the infrared heating setting tube is heated to 250°C and is 27 mm away from the fabric plane.

[0075] In order to improve the insufficient elasticity of PLA fibers, the loops become pointed when the hooks and loops are formed, and the loop rods are easily collapsed under pressure. The Velcro is baked at 125°C for 4 minutes, so that the hooks and loops shrink at high temperature, the loops become round, the loop rods become shorter and harder, and the surface texture of the fabric is clear and smooth, which improves the appearance and hook rate of the Velcro, and improves the peel strength and shear strength of the Velcro.

[0076] A halogen-free and heavy metal-free coating adhesive is prepared to coat the Velcro. The coating adhesive formula is: polyurethane resin YC-180KA, butanone MEK, and crosslinking agent CA-800D are heated and mixed evenly in a weight percentage ratio of 100:45:25.

[0077] The coating amount of the coating glue on the back side of the hook and loop fastener is 140g / m 2 , dry the coated Velcro at 98℃ for 4 minutes to lock the Velcro structure and consolidate it into one, so that there will be no burrs when cutting and it will not fall apart when used.

[0078] Finally, cut the Velcro monofilament hook at about 2 / 3 of the height of the loop column to form a Velcro hook.

Claims

1. A method for manufacturing a PLA and degradable polyester interwoven hook and loop fastener, characterized in that The method includes the steps of designing the structure and parameters of the hook and loop fastener, steaming the raw materials, weaving, baking the hook and loop fastener, gluing and cutting the hooks, wherein the hook and loop fastener structure and parameter design are as follows: using a hook and loop fastener structure with the same surface, a base fabric of the hook and loop fastener woven with degradable polyester filament, hooks woven with PLA monofilament, and loops woven with PLA multifilament; The raw material steaming is as follows: before weaving the hook and loop fastener, the 280-320D / 14-16f PLA multifilament yarn used in the terry warp yarn needs to be twisted with 80-120 twists / m to improve the yarn cohesion strength, and steamed at 95-100°C for 30-40 minutes; the 150-180D / 74-84f biodegradable polyester yarn used in the ground warp needs to be twisted with 80-120 twists / m; The hook and loop weaving process is as follows: the terry warp yarn is 280-320D / 14-16f PLA multifilament, the hook and loop warp yarn is 0.16-0.18mm PLA monofilament, the ground warp yarn is 150-180D / 74-84f biodegradable polyester, and the weft yarn is 150-180D / 74-84f biodegradable polyester; Warp arrangement: 1 wool warp: 4-5 ground warps, 1 hook warp: 4-5 ground warps, warp density 9-11 warps / 2.54cm, weft density 45-47 wefts / 2.54cm; A looping piece is set at the place where there is hook warp or hair warp. The height of the hair warp looping piece is 2.2-2.4mm, and the height of the hook warp looping piece is 1.6-1.8mm. The fabric blank is warped and woven; During weaving, the infrared heating setting tube is heated to 200-300℃ and is 25-30mm away from the fabric plane; The hook and loop fastener baking step is as follows: the hook and loop fastener is baked at 120-130° C. for 3-5 minutes after being woven; The gluing step is to prepare a halogen-free and heavy metal-free coating adhesive and coat the hook and loop fastener. The coating adhesive formula mass ratio is: Polyurethane resin YC-180KA 100 MEK 35-55 Crosslinking agent CA-800D 20-30 Heat and mix evenly; The coating amount of the coating glue on the back side of the hook and loop fastener is 130-160g / m 2 , dry the coated hook and loop fastener at 95-105℃ for 2-5min; Cut the Velcro monofilament hook loop at about 2 / 3 of the height of the loop column to form a Velcro hook.

2. A method for manufacturing a PLA and degradable polyester interwoven hook and loop fastener, characterized in that It includes the steps of hook and loop fastener structure and parameter design, raw material steaming, weaving, hook and loop fastener baking, gluing and hook cutting; The structure and parameter design of the hook and loop fastener are as follows: a hook and loop fastener structure with the same surface is adopted, a degradable polyester filament woven hook and loop fastener is made of PLA monofilament, and a PLA multifilament woven loop fastener is made of PLA monofilament. The raw material steaming process is as follows: before weaving the hook and loop fastener, the 280-320D / 14-16f PLA multifilament yarn used in the terry warp needs to be twisted with 80-120 twists / m to improve the yarn cohesion strength, and steamed at 95-100℃ for 30-40 minutes; the 150-180D / 74-84f biodegradable polyester yarn used in the ground warp needs to be twisted with 80-120 twists / m; The weaving process of the hook and loop fastener is as follows: the terry warp yarn is 280-320D / 14-16f PLA multifilament, the hook and loop warp yarn is 0.16-0.18mm PLA monofilament, the ground warp yarn is 150-180D / 74-84f biodegradable polyester, and the weft yarn is 150-180D / 74-84f biodegradable polyester. Warp arrangement: 1 wool warp: 4-5 ground warps, 1 hook warp: 4-5 ground warps, warp density 9-11 warps / 2.54cm, weft density 45-47 wefts / 2.54cm; A looping piece is set at the place where there is hook warp or hair warp. The height of the hair warp looping piece is 2.2-2.4mm, and the height of the hook warp looping piece is 1.6-1.8mm. The fabric blank is warped and woven; During weaving, the infrared heating setting tube is heated to 200-300℃ and is 25-30mm away from the fabric plane; The hook and loop fastener baking steps are as follows: the hook and loop fastener is baked at 120-130°C for 3-5 minutes after weaving; The gluing steps are: prepare a halogen-free and heavy metal-free coating adhesive, and coat the hook and loop fastener. The coating adhesive formula mass ratio is: Polyurethane resin YC-180KA 100 MEK 30-60 Crosslinking agent CA-800D 15-35 Heat and mix evenly; The coating amount of the coating glue on the back side of the hook and loop fastener is 120-170g / m 2 , dry the coated hook and loop fastener at 90-115℃ for 2-6min; Cut the Velcro monofilament hook loop at about 2 / 3 of the height of the loop column to form a Velcro hook.