PUR adhesive bonding process for 20D nylon super-porous fabric

Abstract

The application discloses a 20D nylon super water-repellent fabric PUR gluing process, which comprises the following steps: A, fabric pretreatment: the 20D super water-repellent nylon fabric is put into a pretreatment chamber for loose winding treatment; B, setting the temperature of a composite machine engraving roller to 95-100 DEG C, and selecting a PUR glue suitable for the super water-repellent fabric; C, composite side cloth feeding: the cloth guide is fed from the composite cloth feeding position to winding.The application first lets the nylon fabric absorb water in a suitable temperature and humidity environment, generates a plasticizing effect, makes the material volume expand, the modulus drop, and obvious creep occurs under the action of stress, and the fabric is preheated during gluing, improves the surface energy of the fabric, and is beneficial to gluing; in the prior art, the fabric is not preheated during gluing, and after the fabric is glued, a curing process is strictly implemented, specifically: stacking and curing: humidity 80-90%, temperature 30 DEG C, stacking for 48 hours, after the above scheme, the detection according to FZT 80007.1-2006 can reach the standard of 7N.

Description

Technical Field

[0001] This invention relates to the field of fabric technology, specifically to a PUR adhesive bonding process for 20D nylon super-repellent fabric. Background Technology

[0002] 20D nylon super-resilient fabric is difficult to bond, and there is no mature solution in the industry yet. The reasons are as follows:

[0003] 1. Thin fabrics are prone to adhesive seepage. Ultra-thin fabrics require PUR (moisture-curing reactive polyurethane hot melt adhesive) with good wetting properties to bond firmly. However, PUR with good wetting properties generally has good fluidity, which makes it easy for adhesive to seep through. This is a contradiction.

[0004] 2. The yarn is FDY (fully drawn yarn), which is untwisted and has difficulty forming sufficient mechanical bonding force with PUR adhesive. Twisted fabrics are relatively easy to bond, but the fabric is generally thicker after the yarn is twisted.

[0005] 3. The fabric is waterproof to level 5, with low surface energy, making it difficult for PUR adhesive to wet. Although there are some water-repellent PURs on the market, their performance is not good. According to FZT 80007.1-2006 testing, they generally only achieve 3-5N, while the standard requires 7N. Summary of the Invention

[0006] The purpose of this invention is to provide a PUR adhesive bonding process for 20D nylon super-repellent fabric to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a PUR adhesive bonding process for 20D nylon super-repellent fabric, comprising the following steps:

[0008] A. Fabric pretreatment: Place the 20D super water-repellent nylon fabric in the pretreatment chamber for loosening and rolling. Control the temperature of the pretreatment chamber to be 35-45℃ and the humidity to be 85-95%. Then, pile the loosened fabric for 12 hours.

[0009] B. Set the temperature of the engraving roller of the laminating machine to 95-100℃ and select PUR adhesive suitable for bonding ultra-thin fabrics.

[0010] C. Composite side-threading: Thread the guide fabric from the composite inlet to the roll-up. Stop threading the fabric when the front fabric is 2 meters away from the laminating roller.

[0011] D. Film threading: Thread the film from the contact unwinding point to the laminating roller, and use double-sided tape to bond the film to the fabric. If there is a protective film, peel it off while threading the film and wind it onto the winding device.

[0012] E. After reaching the set temperature, turn on the hot melt adhesive pump to deliver adhesive to the adhesive tank, and set the coating gap to -0.5mm and the lamination gap or bonding gap to -0.3mm;

[0013] F. Increase the speed of the production line to the production speed specified on the process sheet, which is 12m / min.

[0014] G. Place the bonded composite fabric into the curing chamber and control the temperature at 30℃ and the humidity at 80-90%, and finally stack it for 48 hours.

[0015] Preferably, in step B, the coating amount of the engraving roller of the laminating machine is 10-12 g / m2, and the PUR adhesive suitable for bonding the super-splashed fabric is a moisture-curing reactive polyurethane hot melt adhesive, and the moisture-curing reactive polyurethane hot melt adhesive is Fuller 5408 or Fuller 5808.

[0016] Preferably, in step C, the guide fabric is 40 meters long, the main fabric is a pre-treated 20D super water-repellent nylon fabric, and in this process, the temperature of the preheating roller of the laminating machine before bonding the fabric is set to 75-85°C.

[0017] Preferably, in step D, the membrane is one of TPU waterproof and breathable membrane, PU film, TPEE film or PTFE film, and the protective film is PE film.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] This invention first allows the nylon fabric to absorb water in a suitable temperature and humidity environment, generating a plasticizing effect that causes the material to expand in volume and decrease in modulus. Under stress, significant creep occurs. Furthermore, the fabric is preheated during bonding to increase its surface energy, facilitating bonding. In contrast, existing technologies do not preheat the fabric during bonding. Additionally, a strict curing process is performed after bonding, specifically: stacking and curing at 80-90% humidity and 30°C for 48 hours. After this process, the fabric meets the 7N standard according to FZT80007.1-2006. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] A PUR adhesive bonding process for 20D nylon super-repellent fabric includes the following steps:

[0022] A. Fabric pretreatment: Place the 20D super water-repellent nylon fabric into the pretreatment chamber for loosening and rolling.

[0023] B. Set the temperature of the engraving roller of the laminating machine to 95-100℃ and select PUR adhesive suitable for bonding ultra-thin fabrics.

[0024] C. Composite side-threading: Thread the guide fabric from the composite inlet to the roll-up. Stop threading the fabric when the front fabric is 2 meters away from the laminating roller.

[0025] D. Film threading: Thread the film from the contact unwinding point to the laminating roller, and use double-sided tape to bond the film to the fabric. If there is a protective film, peel it off while threading the film and wind it onto the winding device.

[0026] E. After reaching the set temperature, turn on the hot melt adhesive pump to deliver adhesive to the adhesive tank, and set the coating gap to -0.5mm and the lamination gap or bonding gap to -0.3mm;

[0027] F. Increase the speed of the production line to the production speed specified on the process sheet, which is 12m / min.

[0028] G. Place the bonded composite fabric into the curing chamber and control the temperature at 30℃ and the humidity at 80-90%, and finally stack it for 48 hours.

[0029] First, the nylon fabric absorbs water in a suitable temperature and humidity environment, producing a plasticizing effect that causes the material to expand in volume and decrease in modulus. Under stress, it undergoes significant creep. Preheating the fabric before bonding increases its surface energy, facilitating bonding. However, existing technologies do not preheat the fabric during bonding. Furthermore, a strict curing process is performed after bonding, specifically: stacking for 48 hours at 80-90% humidity and 30°C. After this process, the 7N standard can be achieved according to FZT 80007.1-2006.

[0030] Example 1:

[0031] A PUR adhesive bonding process for 20D nylon super-repellent fabric includes the following steps:

[0032] A. Fabric pretreatment: Place the 20D super water-repellent nylon fabric into the pretreatment chamber for loosening and rolling. Control the temperature of the pretreatment chamber to be 35℃ and the humidity to be 85%. Then, pile the loosened fabric for 12 hours.

[0033] B. Set the temperature of the engraving roller of the laminating machine to 95℃ and select PUR adhesive suitable for bonding ultra-thin fabrics.

[0034] C. Composite side-threading: Thread the guide fabric from the composite inlet to the roll-up. Stop threading the fabric when the front fabric is 2 meters away from the laminating roller.

[0035] D. Film threading: Thread the film from the contact unwinding point to the laminating roller, and use double-sided tape to bond the film to the fabric. If there is a protective film, peel it off while threading the film and wind it onto the winding device.

[0036] E. After reaching the set temperature, turn on the hot melt adhesive pump to deliver adhesive to the adhesive tank, and set the coating gap to -0.5mm and the lamination gap or bonding gap to -0.3mm;

[0037] F. Increase the speed of the production line to the production speed specified on the process sheet, which is 12m / min.

[0038] G. Place the bonded composite fabric into the curing chamber and control the temperature at 30℃ and the humidity at 80%, and finally stack it for 48 hours.

[0039] Example 2:

[0040] A PUR adhesive bonding process for 20D nylon super-repellent fabric includes the following steps:

[0041] A. Fabric pretreatment: Place the 20D super water-repellent nylon fabric into the pretreatment chamber for loosening and rolling.

[0042] B. Set the temperature of the engraving roller of the laminating machine to 100℃ and select a PUR adhesive suitable for bonding ultra-thin fabric. The coating amount of the engraving roller of the laminating machine is 12g / m2. The PUR adhesive suitable for bonding ultra-thin fabric is a moisture-curing reactive polyurethane hot melt adhesive, and the moisture-curing reactive polyurethane hot melt adhesive is Fuller 5408 or Fuller 5808.

[0043] C. Composite side-threading: Thread the guide fabric from the composite inlet to the roll-up. Stop threading the fabric when the front fabric is 2 meters away from the laminating roller.

[0044] D. Film threading: Thread the film from the contact unwinding point to the laminating roller, and use double-sided tape to bond the film to the fabric. If there is a protective film, peel it off while threading the film and wind it onto the winding device.

[0045] E. After reaching the set temperature, turn on the hot melt adhesive pump to deliver adhesive to the adhesive tank, and set the coating gap to -0.5mm and the lamination gap or bonding gap to -0.3mm;

[0046] F. Increase the speed of the production line to the production speed specified on the process sheet, which is 12m / min.

[0047] G. Place the bonded composite fabric into the curing chamber and control the temperature at 30℃ and humidity at 90%, and finally stack it for 48 hours.

[0048] Example 3:

[0049] A PUR adhesive bonding process for 20D nylon super-repellent fabric includes the following steps:

[0050] A. Fabric pretreatment: Place the 20D super water-repellent nylon fabric into the pretreatment chamber for loosening and rolling.

[0051] B. Set the temperature of the engraving roller of the laminating machine to 97℃ and select PUR adhesive suitable for bonding ultra-thin fabrics.

[0052] C. Composite side-threading fabric: Thread the guide fabric from the composite inlet to the roll-up. Stop threading the fabric when the main fabric is 2 meters away from the laminating roller. The length of the guide fabric is 40 meters. The main fabric is a pre-treated 20D super water-repellent nylon fabric. During this process, the temperature of the heating roller of the composite machine before bonding the fabric is set to 80℃.

[0053] D. Film threading: Thread the film from the contact unwinding point to the laminating roller, and use double-sided tape to bond the film to the fabric. If there is a protective film, peel it off while threading the film and wind it onto the winding device.

[0054] E. After reaching the set temperature, turn on the hot melt adhesive pump to deliver adhesive to the adhesive tank, and set the coating gap to -0.5mm and the lamination gap or bonding gap to -0.3mm;

[0055] F. Increase the speed of the production line to the production speed specified on the process sheet, which is 12m / min.

[0056] G. Place the bonded composite fabric into the curing chamber and control the temperature at 30℃ and humidity at 85%, and finally stack it for 48 hours.

[0057] Example 4:

[0058] A PUR adhesive bonding process for 20D nylon super-repellent fabric includes the following steps:

[0059] A. Fabric pretreatment: Place the 20D super water-repellent nylon fabric into the pretreatment chamber for loosening and rolling.

[0060] B. Set the temperature of the engraving roller of the laminating machine to 98℃ and select PUR adhesive suitable for bonding ultra-thin fabrics.

[0061] C. Composite side-threading: Thread the guide fabric from the composite inlet to the roll-up. Stop threading the fabric when the front fabric is 2 meters away from the laminating roller.

[0062] D. Film threading: Thread the film from the contact unwinding point to the laminating roller, and use double-sided tape to bond the film and fabric together. If there is a protective film, peel off the protective film while threading the film and wind it onto the winding device. The film to be threaded is one of TPU waterproof and breathable film, PU film, TPEE film or PTFE film, and the protective film is PE film.

[0063] E. After reaching the set temperature, turn on the hot melt adhesive pump to deliver adhesive to the adhesive tank, and set the coating gap to -0.5mm and the lamination gap or bonding gap to -0.3mm;

[0064] F. Increase the speed of the production line to the production speed specified on the process sheet, which is 12m / min.

[0065] G. Place the bonded composite fabric into the curing chamber and control the temperature at 30℃ and humidity at 88%, and finally stack it for 48 hours.

[0066] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PUR adhesive bonding process for 20D nylon super-repellent fabric, characterized in that: Includes the following steps: A. Fabric pretreatment: Place the 20D super water-repellent nylon fabric into the pretreatment chamber for loosening and rolling. Control the temperature of the pretreatment chamber to be 35-45℃ and the humidity to be 85-95%. Then, pile the loosened fabric for 12 hours. B. Set the temperature of the engraving roller of the laminating machine to 95-100℃ and select PUR adhesive suitable for bonding ultra-thin fabrics. C. Composite side-threading: Thread the guide fabric from the composite inlet to the roll-up. Stop threading the fabric when the front fabric is 2 meters away from the laminating roller. D. Film threading: Thread the film from the contact unwinding point to the laminating roller, and use double-sided tape to bond the film to the fabric. If there is a protective film, peel it off while threading the film and wind it onto the winding device. E. After reaching the set temperature, turn on the hot melt adhesive pump to deliver adhesive to the adhesive tank, and set the coating gap to -0.5mm and the lamination gap or bonding gap to -0.3mm; F. Increase the speed of the production line to the production speed specified on the process sheet, which is 12m / min. G. Place the bonded composite fabric into the curing chamber and control the temperature at 30℃ and the humidity at 80-90%, and finally stack it for 48 hours.

2. The PUR adhesive bonding process for 20D nylon super-repellent fabric according to claim 1, characterized in that: In step B, the coating amount of the engraving roller of the laminating machine is 10-12 g / m2, and the PUR adhesive suitable for bonding the super-splashed fabric is a moisture-curing reactive polyurethane hot melt adhesive, and the moisture-curing reactive polyurethane hot melt adhesive is Fuller 5408 or Fuller 5808.

3. The PUR adhesive bonding process for 20D nylon super-repellent fabric according to claim 1, characterized in that: In step C, the guide cloth is 40 meters long, the main cloth is a pre-treated 20D super water-repellent nylon fabric, and in this process, the temperature of the preheating roller of the laminating machine before bonding the fabric is set to 75-85℃.

4. The PUR adhesive bonding process for 20D nylon super-repellent fabric according to claim 1, characterized in that: In step D, the membrane is one of TPU waterproof and breathable membrane, PU film, TPEE film or PTFE film, and the protective film is PE film.