Aging-resistant luggage cloth and a preparation method thereof

Abstract

The application discloses an anti-aging luggage cloth and a preparation method thereof. Polyethylene imine is mixed into PVC in a blending mode to obtain a PVC blending film. Water in the polyethylene imine aqueous solution plays a role of a pore forming agent in the film forming process. The volume originally occupied by water molecules forms a pore structure, which is beneficial to the subsequent loading of titanium dioxide and 2-mercaptobenzimidazole, improves the loading capacity, and further improves the anti-aging performance of the luggage cloth. Titanium acid tetraisopropyl ester and 2-mercaptobenzimidazole are added into an ethanol solution to avoid the direct addition of titanium dioxide powder and 2-mercaptobenzimidazole, and the problem of easy agglomeration. The titanium dioxide and 2-mercaptobenzimidazole jointly improve the anti-aging performance of the cloth. Then, under the action of a crosslinking agent, epoxy chloropropane, the titanium dioxide and 2-mercaptobenzimidazole are firmly attached to the PVC film and are not easy to fall off. After multiple water washing, the luggage cloth still has good anti-aging performance.

Description

Technical Field

[0001] This invention relates to the field of fabric preparation technology, specifically to an aging-resistant bag fabric and its preparation method. Background Technology

[0002] Bags are commonly used in daily life to store and hold everyday clothes. With the development of the times, the materials used to make bags have evolved from traditional genuine leather to a variety of materials such as polyester, polyamide, PU, ​​and PVC.

[0003] Nylon: This is a synthetic fiber with high strength and abrasion resistance, and it is not easily affected by moisture. Nylon bags are very common in the market. They are characterized by their durability, lightness, and water resistance.

[0004] Polyester: This is also a synthetic fiber with high strength and abrasion resistance, and it is not easily deformed. Polyester bags are very common in the market. Its characteristics are durability, lightness and easy washing.

[0005] Cotton: This is a natural fiber that is breathable and comfortable to the touch. Cotton bags are also very common in the market. Its characteristics are comfort, naturalness, and washability.

[0006] Leather: This is a material made from animal hides through a series of processes. It has a unique beauty and feel. Leather bags are usually used in the high-end market and are characterized by their nobility, elegance, and durability.

[0007] Artificial leather: This is a synthetic material that resembles leather, with a similar appearance and feel. Bags made of artificial leather are also very common in the market. They are characterized by their durability, ease of washing, and relatively low price.

[0008] In addition, there are other bag fabrics such as canvas, plush, and silk. Different materials and fabrics have different characteristics and uses in bag design, and you can choose the appropriate bag fabric according to your needs.

[0009] Bag fabrics often experience aging and short lifespan during long-term use. To address this issue, existing technologies typically involve coating the base fabric with an anti-aging agent to block ultraviolet rays. For example, Chinese patent document CN201710043356.7 discloses an anti-aging PVC-coated canopy fabric and its manufacturing process. The fabric includes a base fabric and two PVC films located on the upper and lower sides of the base fabric, respectively. The PVC films are made from the following raw materials in parts by weight: 100 parts PVC resin powder, 3-4 parts antimony trioxide, 50-60 parts dioctyl phthalate, 3-4 parts dimethyl adipate, 3-5 parts titanium dioxide, 3-6 parts stabilizer, 2-4 parts soybean oil, 20 parts calcium carbonate, and 3-5 parts activated carbon powder. The PVC film prepared by this patent has a complex composition and uneven dispersion of inorganic materials, which affects the overall performance of the fabric. Summary of the Invention

[0010] In view of the shortcomings of the prior art, the purpose of this invention is to provide an aging-resistant bag fabric and its preparation method. The prepared bag fabric has excellent aging resistance and washability.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A method for preparing an aging-resistant bag fabric includes the following steps: unfolding the base fabric, laying a PVC composite film flat on the base fabric, stretching it first through a tension adjusting device, then pressing it into shape through a hot pressing device, followed by shaping it through a cold pressing device, and finally winding it into shape through a traction winding device to obtain the bag fabric; wherein, the preparation method of the PVC composite film is as follows:

[0013] S1. Add PVC to N,N-dimethylformamide solvent, heat and stir to dissolve, and obtain PVC solution;

[0014] S2. Add the polyethyleneimine aqueous solution dropwise to the PVC solution, stir evenly, let stand to remove bubbles, and obtain the casting solution. Then cast the casting solution onto a glass plate and dry it to obtain a PVC blend film.

[0015] S3. Add tetraisopropyl titanate and 2-mercaptobenzimidazole to the ethanol solution, stir evenly, then add ammonia solution dropwise to adjust the pH of the system to 9-10, keep it at 40-60℃ for 6-12h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution.

[0016] S4. Coat both sides of the PVC blend film with the coating liquid, dry to remove the solvent, and then immerse it in epichlorohydrin solution at 50-70℃ for 2-3 hours. After removal, wash with water and dry to obtain the PVC composite film.

[0017] Preferably, the mass ratio of the fabric base to the PVC composite film is 80-90:10-20.

[0018] Preferably, in step S1, the mass fraction of the PVC solution is 10-15%.

[0019] Preferably, in step S2, the mass ratio of the polyethyleneimine aqueous solution to the PVC solution is 5-10:100, and the mass fraction of the polyethyleneimine aqueous solution is 10-20%.

[0020] Preferably, in step S2, the thickness of the PVC blend film is 50-150 μm.

[0021] Preferably, in step S3, the mass ratio of tetraisopropyl titanate, 2-mercaptobenzimidazole, and ethanol is 5-10:3-5:100.

[0022] Preferably, in step S3, the mass fraction of the ammonia solution is 25-30%.

[0023] Preferably, in step S4, the coating amount on each side is 5-10 g / cm². 2 .

[0024] Preferably, in step S4, the mass fraction of the epichlorohydrin solution is 3-5%.

[0025] The present invention also provides a bag fabric prepared by the above preparation method.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) In this invention, polyethyleneimine is incorporated into PVC by blending to obtain a PVC blend film. Polyethyleneimine is an organic polymer compound containing a long alkyl chain structure. Introducing it into the PVC film is beneficial to improving the mechanical properties of the PVC film. Water in the polyethyleneimine aqueous solution acts as a pore-forming agent during the film formation process. The volume originally occupied by water molecules forms a pore structure, which is beneficial to the subsequent loading of titanium dioxide and 2-mercaptobenzimidazole. By increasing the loading of anti-aging agents, the anti-aging performance of the bag fabric is improved.

[0028] (2) In this invention, tetraisopropyl titanate and 2-mercaptobenzimidazole are added to an ethanol solution. 2-mercaptobenzimidazole dissolves in ethanol, and tetraisopropyl titanate is hydrolyzed in the ethanol solution to generate titanium dioxide. After being ultrasonically dispersed evenly, a coating solution is obtained. The coating solution is then applied to a PVC blend film and dried to remove the solvent. This avoids the problem of agglomeration that can easily occur when titanium dioxide powder and 2-mercaptobenzimidazole are directly added. The combined effect of titanium dioxide and 2-mercaptobenzimidazole further improves the aging resistance of the bag fabric. Subsequently, the bag fabric is immersed in an epichlorohydrin solution. Under the action of the crosslinking agent epichlorohydrin, titanium dioxide and 2-mercaptobenzimidazole are firmly attached to the PVC film and are not easy to fall off. After multiple washes, the bag fabric still has good aging resistance. Detailed Implementation

[0029] The present invention will be further described in detail below through specific preferred embodiments, but the present invention is not limited to the following embodiments.

[0030] It should be noted that, unless otherwise specified, all chemical reagents involved in this invention were purchased through commercial channels.

[0031] The base fabric of this invention is made of 840D×840D polyester filament through warping weaving;

[0032] PVC CAS number: 9002-86-2, grade: SG-5;

[0033] The relative molecular mass of polyethyleneimine is 3000;

[0034] CAS number for 2-mercaptobenzimidazole: 583-39-1.

[0035] Example 1

[0036] A method for preparing an aging-resistant bag fabric includes the following steps: 80g of fabric base fabric is unfolded, and 20g of PVC composite film is laid flat on the fabric base fabric. The fabric is first stretched using a tension adjusting device, then pressed into shape using a hot pressing device at a pressure of 6Pa and a heating temperature range of 160℃ for 10 minutes. Subsequently, it is shaped using a cold pressing device at a pressure of 6Pa for 10 minutes, and then wound into shape using a traction winding device to obtain the bag fabric. The preparation method of the PVC composite film is as follows:

[0037] S1. Add 10g of PVC resin powder to 100g of N,N-dimethylformamide solvent and stir to dissolve at 60℃ to obtain PVC solution;

[0038] S2. Add 5g of 10wt% polyethyleneimine aqueous solution to 100g of PVC solution, stir evenly, let stand to remove bubbles, and obtain casting solution. Then cast the casting solution onto a glass plate and dry it to obtain PVC blend film with a thickness of 100μm.

[0039] S3. Add 5g tetraisopropyl titanate and 5g 2-mercaptobenzimidazole to 100g ethanol solution, stir evenly, then add 25wt% ammonia solution dropwise to adjust the pH of the system to 10, keep it at 40℃ for 10h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution.

[0040] S4. Apply the coating solution to both sides of the PVC blend film, with a coating amount of 10 g / cm² on each side. 2 After drying to remove the solvent, it is then immersed in a 4 wt% epichlorohydrin solution at 50°C for 3 hours. After removal, it is washed with water and dried to obtain the PVC composite film.

[0041] Example 2

[0042] A method for preparing an aging-resistant bag fabric includes the following steps: 80g of fabric base fabric is unfolded, and 20g of PVC composite film is laid flat on the fabric base fabric. The fabric is first stretched using a tension adjusting device, then pressed into shape using a hot pressing device at a pressure of 6Pa and a heating temperature range of 160℃ for 10 minutes. Subsequently, it is shaped using a cold pressing device at a pressure of 6Pa for 10 minutes, and then wound into shape using a traction winding device to obtain the bag fabric. The preparation method of the PVC composite film is as follows:

[0043] S1. Add 15g of PVC resin powder to 100g of N,N-dimethylformamide solvent and stir to dissolve at 60℃ to obtain a PVC solution;

[0044] S2. Add 10g of 15wt% polyethyleneimine aqueous solution to 100g of PVC solution, stir evenly, let stand to remove bubbles, and obtain casting solution. Then cast the casting solution onto a glass plate and dry it to obtain PVC blend film with a thickness of 100μm.

[0045] S3. Add 10g tetraisopropyl titanate and 4g 2-mercaptobenzimidazole to 100g ethanol solution, stir well, then add 25wt% ammonia solution dropwise to adjust the pH of the system to 10, keep it at 60℃ for 6h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution.

[0046] S4. Apply the coating solution to both sides of the PVC blend film, with a coating amount of 5 g / cm² on each side. 2After drying to remove the solvent, it is then immersed in a 5 wt% epichlorohydrin solution at 70°C for 2 hours. After removal, it is washed with water and dried to obtain the PVC composite film.

[0047] Example 3

[0048] A method for preparing an aging-resistant bag fabric includes the following steps: 80g of fabric base fabric is unfolded, and 20g of PVC composite film is laid flat on the fabric base fabric. The fabric is first stretched using a tension adjusting device, then pressed into shape using a hot pressing device at a pressure of 6Pa and a heating temperature range of 160℃ for 10 minutes. Subsequently, it is shaped using a cold pressing device at a pressure of 6Pa for 10 minutes, and then wound into shape using a traction winding device to obtain the bag fabric. The preparation method of the PVC composite film is as follows:

[0049] S1. Add 12g of PVC resin powder to 100g of N,N-dimethylformamide solvent and stir to dissolve at 60℃ to obtain a PVC solution;

[0050] S2. Add 8g of 20wt% polyethyleneimine aqueous solution to 100g of PVC solution, stir evenly, let stand to remove bubbles, and obtain casting solution. Then cast the casting solution onto a glass plate and dry it to obtain PVC blend film with a thickness of 100μm.

[0051] S3. Add 6g tetraisopropyl titanate and 3g 2-mercaptobenzimidazole to 100g ethanol solution, stir well, then add 25wt% ammonia solution dropwise to adjust the pH of the system to 10, keep it at 50℃ for 8h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution.

[0052] S4. Apply the coating solution to both sides of the PVC blend film, with a coating amount of 8 g / cm² on each side. 2 After drying to remove the solvent, it is then immersed in a 5 wt% epichlorohydrin solution at 60°C for 3 hours. After removal, it is washed with water and dried to obtain the PVC composite film.

[0053] Example 4

[0054] A method for preparing an aging-resistant bag fabric includes the following steps: 80g of fabric base fabric is unfolded, and 20g of PVC composite film is laid flat on the fabric base fabric. The fabric is first stretched using a tension adjusting device, then pressed into shape using a hot pressing device at a pressure of 6Pa and a heating temperature range of 160℃ for 10 minutes. Subsequently, it is shaped using a cold pressing device at a pressure of 6Pa for 10 minutes, and then wound into shape using a traction winding device to obtain the bag fabric. The preparation method of the PVC composite film is as follows:

[0055] S1. Add 10g of PVC resin powder to 100g of N,N-dimethylformamide solvent and stir to dissolve at 60℃ to obtain PVC solution;

[0056] S2. Add 6g of 20wt% polyethyleneimine aqueous solution to 100g of PVC solution, stir evenly, let stand to remove bubbles, and obtain casting solution. Then cast the casting solution onto a glass plate and dry it to obtain PVC blend film with a thickness of 100μm.

[0057] S3. Add 8g tetraisopropyl titanate and 4g 2-mercaptobenzimidazole to 100g ethanol solution, stir well, then add 25wt% ammonia solution dropwise to adjust the pH of the system to 10, keep it at 50℃ for 8h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution.

[0058] S4. Apply the coating solution to both sides of the PVC blend film, with a coating amount of 10 g / cm² on each side. 2 After drying to remove the solvent, it is then immersed in a 4 wt% epichlorohydrin solution at 50°C for 3 hours. After removal, it is washed with water and dried to obtain the PVC composite film.

[0059] Comparative Example 1

[0060] A method for preparing an aging-resistant bag fabric includes the following steps: 80g of fabric base fabric is unfolded, and 20g of PVC composite film is laid flat on the fabric base fabric. The fabric is first stretched using a tension adjusting device, then pressed into shape using a hot pressing device at a pressure of 6Pa and a heating temperature range of 160℃ for 10 minutes. Subsequently, it is shaped using a cold pressing device at a pressure of 6Pa for 10 minutes, and then wound into shape using a traction winding device to obtain the bag fabric. The preparation method of the PVC composite film is as follows:

[0061] S1. Add 10g of PVC resin powder to 100g of N,N-dimethylformamide solvent and stir to dissolve at 60℃ to obtain PVC solution;

[0062] S2. Cast the PVC solution onto a glass plate and dry it to obtain a PVC film with a thickness of 100 μm.

[0063] S3. Add 5g tetraisopropyl titanate and 5g 2-mercaptobenzimidazole to 100g ethanol solution, stir evenly, then add 25wt% ammonia solution dropwise to adjust the pH of the system to 10, keep it at 40℃ for 10h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution.

[0064] S4. Apply the coating solution to both sides of the PVC film, with a coating amount of 10g / cm² on each side. 2After drying to remove the solvent, it is then immersed in a 4 wt% epichlorohydrin solution at 50°C for 3 hours. After removal, it is washed with water and dried to obtain the PVC composite film.

[0065] Comparative Example 2

[0066] A method for preparing an aging-resistant bag fabric includes the following steps: 80g of fabric base fabric is unfolded, and 20g of PVC composite film is laid flat on the fabric base fabric. The fabric is first stretched using a tension adjusting device, then pressed into shape using a hot pressing device at a pressure of 6Pa and a heating temperature range of 160℃ for 10 minutes. Subsequently, it is shaped using a cold pressing device at a pressure of 6Pa for 10 minutes, and then wound into shape using a traction winding device to obtain the bag fabric. The preparation method of the PVC composite film is as follows:

[0067] S1. Add 10g of PVC resin powder to 100g of N,N-dimethylformamide solvent and stir to dissolve at 60℃ to obtain PVC solution;

[0068] S2. Add 5g of 10wt% polyethyleneimine aqueous solution to 100g of PVC solution, stir evenly, let stand to remove bubbles, and obtain casting solution. Then cast the casting solution onto a glass plate and dry it to obtain PVC blend film with a thickness of 100μm.

[0069] S3. Add 5g tetraisopropyl titanate and 5g 2-mercaptobenzimidazole to 100g ethanol solution, stir evenly, then add 25wt% ammonia solution dropwise to adjust the pH of the system to 10, keep it at 40℃ for 10h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution.

[0070] S4. Apply the coating solution to both sides of the PVC blend film, with a coating amount of 10 g / cm² on each side. 2 After drying to remove the solvent, a PVC composite film is obtained.

[0071] Comparative Example 3

[0072] A method for preparing an aging-resistant bag fabric includes the following steps: 80g of fabric base fabric is unfolded, and 20g of PVC composite film is laid flat on the fabric base fabric. The fabric is first stretched using a tension adjusting device, then pressed into shape using a hot pressing device at a pressure of 6Pa and a heating temperature range of 160℃ for 10 minutes. Subsequently, it is shaped using a cold pressing device at a pressure of 6Pa for 10 minutes, and then wound into shape using a traction winding device to obtain the bag fabric. The preparation method of the PVC composite film is as follows:

[0073] S1. Add 10g of PVC resin powder to 100g of N,N-dimethylformamide solvent and stir to dissolve at 60℃ to obtain PVC solution;

[0074] S2. Add 5g of 10wt% polyethyleneimine aqueous solution to 100g of PVC solution, stir evenly, let stand to remove bubbles, and obtain casting solution. Then cast the casting solution onto a glass plate and dry it to obtain PVC blend film with a thickness of 100μm.

[0075] S3. Add 5g of nano titanium dioxide and 5g of 2-mercaptobenzimidazole to 100g of ethanol solution, stir evenly, and then ultrasonically disperse to obtain the coating solution;

[0076] S4. Apply the coating solution to both sides of the PVC blend film, with a coating amount of 10 g / cm² on each side. 2 After drying to remove the solvent, it is then immersed in a 4 wt% epichlorohydrin solution at 50°C for 3 hours. After removal, it is washed with water and dried to obtain the PVC composite film.

[0077] The fabrics prepared in Examples 1-4 and Comparative Examples 1-3 were subjected to performance tests, specifically as follows: the longitudinal breaking strength and longitudinal breaking elongation of the fabrics were tested according to the test methods in the national standard GB / T3923.1-2013.

[0078] Subsequently, the fabrics from Examples 1-4 and Comparative Examples 1-3 were placed in a constant temperature and humidity chamber. The temperature inside the chamber was controlled at 50°C, the humidity at 60%, and the air atmosphere was maintained. Xenon lamps were used to directly irradiate the samples. After the samples were placed in the chamber for 72 hours, they were removed and their longitudinal breaking strength and longitudinal breaking elongation were tested. The retention rate of breaking strength and the retention rate of breaking elongation were used as the evaluation criteria for the aging resistance of the samples.

[0079] Wherein, the fracture strength retention rate = fracture strength value after aging / initial fracture strength value * 100%;

[0080] Elongation at break retention rate = Elongation at break after aging / Initial elongation at break * 100%;

[0081] The experimental results are shown in Table 1:

[0082] Table 1

[0083] Fracture strength retention rate (%) Elongation at break retention rate (%) Example 1 97.2 91.6 Example 2 96.4 89.9 Example 3 96.7 90.7 Example 4 97.3 92.2 Comparative Example 1 85.8 76.5 Comparative Example 2 96.1 89.8 Comparative Example 3 89.6 80.3

[0084] The fabrics prepared in Example 1 and Comparative Example 2 were washed 50 times, dried, and then placed in a constant temperature and humidity chamber. The temperature inside the chamber was controlled at 50°C, the humidity at 60%, and the air atmosphere was used. The samples were directly irradiated with a xenon lamp. After the samples were placed in the chamber for 72 hours, they were taken out and the longitudinal breaking strength and longitudinal breaking elongation were tested. The breaking strength retention rate and breaking elongation retention rate were calculated.

[0085] Among them, the fracture strength retention rate = fracture strength value after water washing and aging / initial fracture strength value * 100%;

[0086] Elongation at break retention rate = Elongation at break after washing and aging / Initial elongation at break * 100%;

[0087] The experimental results are shown in Table 2:

[0088] Table 2

[0089] Fracture strength retention rate (%) Elongation at break retention rate (%) Example 1 93.5 87.2 Comparative Example 2 72.4 68.7

[0090] Finally, it should be noted that the above embodiments do not limit the present invention in any way. Those skilled in the art can make modifications and improvements based on the present invention. Therefore, any modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A method for preparing an aging-resistant bag fabric, characterized in that, The process includes the following steps: unfolding the base fabric, laying the PVC composite film flat on the base fabric, stretching it first using a tension adjusting device, then pressing it into shape using a hot pressing device, followed by shaping it using a cold pressing device, and finally winding it into shape using a traction winding device to obtain the bag fabric; wherein, the preparation method of the PVC composite film is as follows: S1. Add PVC to N,N-dimethylformamide solvent, heat and stir to dissolve, and obtain PVC solution; S2. Add the polyethyleneimine aqueous solution dropwise to the PVC solution, stir evenly, let stand to remove bubbles, and obtain the casting solution. Then cast the casting solution onto a glass plate and dry it to obtain a PVC blend film. S3. Add tetraisopropyl titanate and 2-mercaptobenzimidazole to the ethanol solution, stir evenly, then add ammonia solution dropwise to adjust the pH of the system to 9-10, keep it at 40-60℃ for 6-12h for aging, then cool to room temperature, and ultrasonically disperse to obtain the coating solution. S4. Coat the PVC blend film with the coating liquid on both sides, dry to remove the solvent, and then immerse it in epichlorohydrin solution at 50-70℃ for 2-3 hours. After taking it out, wash it with water and dry it to obtain the PVC composite film. The mass ratio of the base fabric to the PVC composite film is 80-90:10-20.

2. The method for preparing an aging-resistant bag fabric according to claim 1, characterized in that, In step S1, the mass fraction of the PVC solution is 10-15%.

3. The method for preparing an aging-resistant bag fabric according to claim 1, characterized in that, In step S2, the mass ratio of the polyethyleneimine aqueous solution to the PVC solution is 5-10:100, and the mass fraction of the polyethyleneimine aqueous solution is 10-20%.

4. The method for preparing an aging-resistant bag fabric according to claim 1, characterized in that, In step S2, the thickness of the PVC blend film is 50-150 μm.

5. The method for preparing an aging-resistant bag fabric according to claim 1, characterized in that, In step S3, the mass ratio of tetraisopropyl titanate, 2-mercaptobenzimidazole and ethanol is 5-10:3-5:

100.

6. The method for preparing an aging-resistant bag fabric according to claim 1, characterized in that, In step S3, the mass fraction of the ammonia solution is 25-30%.

7. The method for preparing an aging-resistant bag fabric according to claim 1, characterized in that, In step S4, the mass fraction of the epichlorohydrin solution is 3-5%.

8. The bag fabric prepared by the preparation method according to any one of claims 1-7.