High-strength antibacterial spandex fabric and preparation method thereof

Abstract

The invention discloses a high-strength antibacterial spandex fabric and a preparation method thereof, and relates to the related field of knitted fabrics, and the high-strength antibacterial spandex fabric comprises a top layer, a middle layer and a bottom layer. The middle reinforcing layer of an integrated square frame and cross structure is embedded between the top-layer knitted material and the bottom-layer knitted material, so that the overall tensile strength and structural stability are effectively improved, and the tensile property reaching up to 1000 N or above is achieved; meanwhile, the high-elasticity knitted fabric is adopted to keep good softness and breathability, the PUR hot melt adhesive compounding technology is combined, firm bonding and excellent washability are achieved, the overall structure is light, flexible and tough, and the fabric is suitable for multiple scenes such as high-strength sports, labor protection and protection.

Description

Technical Field

[0001] The present invention relates to the field of knitted fabrics, and particularly to a high-strength antibacterial spandex fabric and a preparation method thereof. Background Art

[0002] A composite knitted fabric is a multi-layered fabric formed by compounding with other materials (such as films, non-woven fabrics, foams, etc.) through physical or chemical methods. It combines the softness and breathability of knitted fabrics with the functionality of composite materials, such as waterproofing, warmth retention, antibacterial properties, etc., and is widely used in the fields of functional clothing, outdoor equipment, and household items.

[0003] A high-strength and high-elastic spandex fiber and a preparation method thereof with the Chinese Patent Publication No. CN202010387910.5. The preparation method includes the following steps: preparing a prepolymer by reacting a polyol and an isocyanate; performing secondary polymerization on the prepolymer with a chain extender, adding a chain terminator to terminate the polymerization to obtain a polymer stock solution of polyurethane urea; optionally adding an additive to the polymer stock solution of polyurethane urea, stirring evenly, and then performing spinning to obtain the spandex fiber; the isocyanate is a mixture containing a diisocyanate and a carbodiimide-modified isocyanate, and the spandex fiber has both high strength and high elastic properties, with a strength of 1.70 - 2.00 g / d or higher, a definite elongation stress of 10.5 - 13.5 cN, a breaking elongation rate of 520 - 600 cN or higher, and an elastic recovery rate of 93 - 95% or higher, greatly improving the weaving performance of spandex fabrics in the field of high elasticity.

[0004] In the actual use process of the above patent and the prior art, the following problems exist: both are single-layer structures, and the anti-tensile stability at the edge position is weak; and during the processing process, it is necessary to manually remove the glue on the side, which is labor-consuming, or directly cut off the side, resulting in excessive material waste. Summary of the Invention

[0005] Therefore, in order to solve the above deficiencies, the present invention provides a high-strength antibacterial spandex fabric and a preparation method thereof.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: a high-strength antibacterial spandex fabric and a preparation method thereof, including a top layer and a bottom layer made of a spandex-polyester blend, a middle layer is provided between the top layer and the bottom layer, the middle layer is an anti-tensile strengthening layer, and the middle layer is in a square cross shape.

[0007] Preferably, the specific steps are as follows: S1 Material Selection: The top layer and the bottom layer are made of a spandex-polyester blend, 90% spandex + 10% polyester, the middle layer is made of ultra-high molecular weight polyethylene fiber, and the adhesive is a polyurethane reactive hot melt adhesive; S2 middle layer processing: The ultra-high molecular weight polyethylene fiber cloth is plasma treated, and then the cloth is cut into a square cross shape by a laser cutting machine. After the cutting is completed, the edge is processed by ultrasonic passivation; S3 composite lamination: Use an automatic spreading machine to lay the bottom knitted fabric, then use a robot to grab the middle layer and place it on top of the bottom knitted fabric, then apply the adhesive using a screen coating machine, and finally cover the top knitted fabric; S4 hot pressing bonding: Use low-temperature pre-pressing machine and high-temperature laminating machine for preliminary lamination and final hot pressing. After the hot pressing is completed, the knitted fabric is input into the side scraping glue finishing device for side scraping glue treatment; S5 post-treatment: Cool and shape by cold air cooling, then spray antibacterial agent on the surface, and finally cut, trim and finish the surface. Silicone oil softener can be applied on the surface for softening.

[0008] Preferably, the side scraping and finishing device is provided with two groups, the two groups of side scraping and finishing devices are arranged opposite to each other, and the bottom passes through the knitted fabric guided by the guide roller group. The side scraping and finishing device includes a transmission mechanism for transmission, a toggle member arranged on the left side of the transmission mechanism, a connecting rod connected to the left side of the transmission mechanism, and a side frame connected to the connecting rod and movably penetrated by the connecting rod, and the middle part of the toggle member is connected to the connecting rod.

[0009] Preferably, the toggle member is in a cross shape.

[0010] Preferably, the transmission mechanism includes a bracket for support, a guide member arranged at the top of the bracket, a fixed block installed on the right side of the guide member, a driving motor arranged at the bottom of the fixed block, a swing arm placed on the top of the fixed block and connected to the output shaft of the driving motor, a toggle block connected to the other end of the swing arm, a follower connected to the toggle block, a sliding member connected to the left side of the follower and passing through the guide member, a rotating rod arranged at the upper end of the sliding member and connected to the connecting rod, a gear arranged at the right end of the outer side of the sliding member, a side follower assembly connected to the gear, a contact plate arranged at the lower end of the sliding member, and a guide bar installed at the front and rear positions of the top of the contact plate, and the top of the guide bar is connected to the lower end of the bracket.

[0011] Preferably, the middle portion of the guide member is hollow.

[0012] Preferably, a guide groove is provided in the middle of the follower, and the shifting block is movably embedded in the guide groove.

[0013] Preferably, the side follower assembly includes a support for supporting and connecting the bracket, a guide rod connected to the upper end of the support, a slide seat sleeved on the outside of the guide rod, a rack provided on the top of the slide seat and meshing with the gear, a sweeping member provided at the bottom of the slide seat, and a collection box installed at the bottom of the sweeping member.

[0014] Preferably, a notch is formed at the lower end of the sweeping member, and the notch communicates with the inside of the collection box.

[0015] Advantages of the present invention: By embedding a middle reinforcing layer with an integrated "square + cross" structure between the top and bottom knitted materials, the present invention effectively improves the overall tensile strength and structural stability, and has a tensile property of over 1000 N. At the same time, a high-elastic knitted fabric is used to maintain good softness and breathability. Combining with the PUR hot-melt adhesive composite process, firm adhesion and excellent wash resistance are achieved. The overall structure is lightweight, flexible and tough, and is suitable for multiple scenarios such as high-intensity sports, labor protection, and protection.

[0016] After the composite process, the present invention is processed by a side scraping and finishing device. There are two groups of side scraping and finishing devices, which are arranged oppositely. An independent motor is arranged inside the device, and it can be driven to perform transmission in three positions. First, the knitted fabric is pressed and scraped, then the side of the knitted fabric is scraped with glue, and finally surface finishing is carried out. The automation effect is good, the glue scraping efficiency is good, manual operation is reduced, and the overall working efficiency is effectively improved. Description of the drawings

[0017] Figure 1 is a schematic structural diagram of the present invention.

[0018] Figure 2 is a schematic diagram of the middle layer structure of the present invention.

[0019] Figure 3 is a schematic installation structure diagram of the side scraping and finishing device of the present invention.

[0020] Figure 4 is a schematic structural diagram of the side scraping and finishing device of the present invention.

[0021] Figure 5 is a schematic structural diagram of the transmission mechanism of the present invention.

[0022] Figure 6 is a schematic diagram of a partial structure of the transmission mechanism of the present invention.

[0023] Figure 7 is a schematic structural diagram of the side follower assembly of the present invention.

[0024] Among them: top layer-a, middle layer-b, bottom layer-c, side scraper and finishing device-d, transmission mechanism-1, toggle member-2, connecting rod-3, side frame-4, bracket-11, guide member-12, fixing block-13, driving motor-14, swing arm-15, toggle block-16, follower-17, sliding member-18, rotating rod-19, gear-110, side follower assembly-111, contact plate-112, guide strip-113, support-1111, guide rod-1112, slide-1113, rack-1114, sweeping member-1115, collection box-1116. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present invention, it is described in detail below through specific embodiments.

[0026] See also Figure 1 and Figure 2 The present invention provides a high-strength antibacterial spandex fabric, including a top layer a, the bottom of the top layer a is connected to a bottom layer c through a middle layer b, which is an adhesive composite connection. The top layer a and the bottom layer c are both made of a spandex-polyester blend. The middle layer b is a tensile reinforcement layer, which uses ultra-high molecular weight polyethylene fiber, and the whole is a square cross shape.

[0027] The present invention provides a preparation method of a high-strength antibacterial spandex fabric, wherein S1 material selection: a top layer a and a bottom layer c are made of spandex-polyester blended fabric, 90% spandex + 10% polyester, gram weight: 220g / m²±10g / m², density: 120D / 144F, elastic elongation: 30%, air permeability: 300mm / s, a middle layer b is made of ultra-high molecular weight polyethylene fiber, gram weight: 100g / m²±5g / m², tensile strength (longitudinal): ≥1000 N / 50mm, tensile strength (transverse): ≥800 N / 50mm, an adhesive is made of polyurethane reactive hot melt adhesive, coating amount: 15-20 g / m², melting temperature: 90-120°C, curing time: 10-15 min, peel strength: ≥20 N / 25mm; S2 middle layer b processing: plasma treatment of ultra-high molecular weight polyethylene fiber cloth to enhance adhesion and improve PUR adhesive bonding, then cut the cloth by laser cutting machine, cutting accuracy: ±0.5mm, cutting speed: laser cutting: 1200-1500 mm / min, cut into a square cross type, and after cutting, use ultrasonic passivation for edge treatment; S3 composite lamination: use an automatic spreading machine to lay the bottom layer c knitted fabric, and then use a robot to grab the middle layer b and place it on the top of the bottom layer c knitted fabric, and then use a screen coating machine to apply the adhesive, and finally cover the top layer a knitted fabric; S4 hot pressing bonding: use a low-temperature pre-pressing machine and a high-temperature laminating machine for preliminary lamination and final hot pressing. After the hot pressing is completed, the knitted fabric is input into the side scraping and finishing device for side scraping; S5 post-processing: cool and shape by cold air cooling, and then spray the antibacterial agent on the surface, and finally cut, trim and finish the surface. Silicone oil softener can be applied on the surface for softening; S6 quality inspection: tensile test, peel strength test and washability test are carried out.

[0028] See also Figures 3-4 Two groups of side scraping and finishing devices d are provided, and the two groups of side scraping and finishing devices d are arranged opposite to each other. The bottom passes through the knitted fabric guided by the guide roller group. The side scraping and finishing device d includes a transmission mechanism 1 for transmission. The left end of the transmission mechanism 1 is connected to the connecting rod 3. A toggle piece 2 is provided on the outside of the connecting rod 3. The left side of the connecting rod 3 is connected to the side frame 4 for support, and the left side of the connecting rod 3 movably passes through the side frame 4. The toggle piece 2 is cross-shaped and flexible to avoid damaging the passing fabric.

[0029] See also Figures 5-7 The transmission mechanism 1 includes a bracket 11 for support. A guide member 12 is welded at the middle of the top of the bracket 11. The middle of the guide member 12 is hollow. A fixed block 13 is integrally formed on the right side of the guide member 12. A driving motor 14 is installed at the bottom of the fixed block 13. The output shaft of the top of the driving motor 14 passes through the fixed block 13 and is connected to a swing arm 15. A toggle block 16 is hinged at the other end of the swing arm 15. The outer side of the toggle block 16 is connected to a follower 17. A guide groove is opened in the middle of the follower 17. The toggle block 16 is movably embedded in the guide groove. The left side of the follower 17 is connected to the sliding member 18. The lower end of the sliding member 18 passes through the middle of the guide member 12, and a rotating rod 19 is arranged on the upper end of the sliding member 18. The left side of the rotating rod 19 is connected to the connecting rod 3. The right end of the outer side of the rotating rod 19 is sleeved with a gear 110. The bottom of the gear 110 is connected to the side follower assembly 111. The right end of the bottom of the side follower assembly 111 is connected to the bracket 11. The bottom of the sliding member 18 is connected to the contact plate 112. The front and rear ends of the top of the contact plate 112 are welded with guide bars 113. The outer side of the guide bar 113 matches the lower end of the bracket 11, and the guide bar 113 can move along the lower end of the bracket 11. The side follower assembly 111 includes a support 1111 whose bottom is fixed to the bracket 11, a guide rod 1112 is provided at the upper end of the support 1111, the installation position of the guide rod 1112 is inclined, a slide 1113 is sleeved on the outer side of the guide rod 1112, a rack 1114 is fixed on the top of the slide 1113, the top of the rack 1114 is meshed with the gear 110, a notch is provided at the lower end of the sweeping member 1115, the edge of the notch is chamfered, and a collecting box 1116 is fixed to the bottom of the sweeping member 1115, the interior of the collecting box 1116 is communicated with the notch, and a movable cover is embedded in the bottom of the collecting box 1116.

[0030] The specific implementation process of the side scraping and finishing device d is as follows: When the side scraping and finishing device d needs to be used, first install the two sets of side scraping and finishing devices d, and the knitted fabric is transported through the guide roller group, passing through the bottom of the contact plate 112, the lower end notch of the sweeping member 1115 and the bottom of the toggle member 2 in sequence, and then the transportation can begin; When the knitted fabric passes by, the drive motor 14 is started to work, and the drive motor 14 drives the swing arm 15 to move, and the swing arm 15 can drive the toggle block 16 to toggle the follower 16, and the follower 16 acts on the sliding member 18, and the sliding member 18 starts to reciprocate in the guide member 12. During the movement, the contact plate 112 connected to the bottom moves with the movement, and presses the passing knitted fabric. At the same time, the gear 110 and the rotating rod 19 start to rotate, and are guided by the rack 1114, and can drive the toggle member 1 115 moves along the guide rod 1112 through the slide 1113. During the movement, the notch at the lower end can scrape off the excess glue overflowing from the side of the knitted fabric, which is collected by the collecting box 1116 connected below. After the scraping is completed, due to the rotation of the rotating rod 19, the connecting rod 3 follows the rotation and moves, and the outer toggle member 2 can scrape the surface of the knitted fabric to sort it, and then enter the next group of relatively arranged side scraping and sorting devices d for processing, completing the efficient scraping of glue on both sides.

[0031] The above description is only a preferred example of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-strength antibacterial spandex fabric, characterized in that: It comprises a top layer and a bottom layer of a spandex-polyester blended material, wherein a middle layer is arranged between the top layer and the bottom layer, the middle layer is an anti-stretching reinforcement layer, and the middle layer is in a square cross shape.

2. The method for preparing a high-strength antibacterial spandex fabric according to claim 1, characterized in that: The specific steps are as follows: S1 material selection: The top and bottom layers are made of spandex-polyester blend, 90% spandex + 10% polyester, the middle layer is made of ultra-high molecular weight polyethylene fiber, and the adhesive is polyurethane reactive hot melt adhesive; S2 middle layer processing: The ultra-high molecular weight polyethylene fiber cloth is plasma treated, and then the cloth is cut into a square cross shape by a laser cutting machine. After the cutting is completed, the edge is processed by ultrasonic passivation; S3 composite lamination: Use an automatic spreading machine to lay the bottom knitted fabric, then use a robot to grab the middle layer and place it on top of the bottom knitted fabric, then apply the adhesive using a screen coating machine, and finally cover the top knitted fabric; S4 hot pressing bonding: Use low-temperature pre-pressing machine and high-temperature laminating machine for preliminary lamination and final hot pressing. After the hot pressing is completed, the knitted fabric is input into the side scraping glue finishing device for side scraping glue treatment; S5 post-treatment: Cool and shape by cold air cooling, then spray antibacterial agent on the surface, and finally cut, trim and finish the surface. Silicone oil softener can be applied on the surface for softening.

3. The method for preparing a high-strength antibacterial spandex fabric according to claim 2, characterized in that: The side scraping and finishing device is provided with two groups, and the two groups of side scraping and finishing devices are arranged opposite to each other. The bottom passes through the knitted fabric guided by the guide roller group. The side scraping and finishing device includes a transmission mechanism for transmission, a toggle member arranged on the left side of the transmission mechanism, a connecting rod connected to the left side of the transmission mechanism, and a side frame connected to the connecting rod and movably penetrated by the connecting rod. The middle part of the toggle member is connected to the connecting rod.

4. The method for preparing a high-strength antibacterial spandex fabric according to claim 3, characterized in that: The toggle member is in a cross shape.

5. The method for preparing a high-strength antibacterial spandex fabric according to claim 4, characterized in that: The transmission mechanism includes a bracket for support, a guide member arranged at the top of the bracket, a fixed block installed on the right side of the guide member, a driving motor arranged at the bottom of the fixed block, a swing arm placed on the top of the fixed block and connected to the output shaft of the driving motor, a toggle block connected to the other end of the swing arm, a follower connected to the toggle block, a sliding member connected to the left side of the follower and passing through the guide member, a rotating rod arranged at the upper end of the sliding member and connected to the connecting rod, a gear arranged at the right end of the outer side of the sliding member, a side follower assembly connected to the gear, a contact plate arranged at the lower end of the sliding member, and a guide bar installed at the front and rear positions of the top of the contact plate, and the top of the guide bar is connected to the lower end of the bracket.

6. The method for preparing a high-strength antibacterial spandex fabric according to claim 5, characterized in that: The middle part of the guide member is hollow.

7. The method for preparing a high-strength antibacterial spandex fabric according to claim 6, characterized in that: A guide groove is provided in the middle of the follower, and the shifting block is movably embedded in the guide groove.

8. The method for preparing a high-strength antibacterial spandex fabric according to claim 5, characterized in that: The side follower assembly includes a support for supporting and connecting the bracket, a guide rod connected to the upper end of the support, a slide seat sleeved on the outside of the guide rod, a rack arranged on the top of the slide seat and meshing with the gear, a sweeping piece arranged at the bottom of the slide seat, and a collection box installed at the bottom of the sweeping piece.

9. The method for preparing a high-strength antibacterial spandex fabric according to claim 8, characterized in that: A notch is provided at the lower end of the sweeping member, and the notch is communicated with the inside of the collection box.

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