Production method of PVC shoulder clamping cloth

Abstract

The invention discloses a production method of PVC shoulder clamping cloth, and belongs to the field of production of PVC shoulder clamping cloth. According to the production method of the PVC shoulder clamping cloth, the wear resistance of the tarpaulin is remarkably improved and the service life of the tarpaulin is remarkably prolonged through a sectional type wear-resistant layer design and a precise temperature control process. The method comprises the steps of preheating and shaping, two times of scraping and drying, calendaring, thickness measuring and adjusting, heat sealing of a wear-resistant layer and the like, the wear-resistant layer is of a sectional structure at the break angle, the wrapping area of the cylinder body is larger than 1.3 M, and the heating temperature is stabilized at 150-155 DEG C. The problems of break angle abrasion and secondary heat sealing difficulty of traditional tarpaulin are solved, the service life is prolonged by at least one time, and the cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of wooden structural beam testing technology, specifically to a method for producing PVC shoulder fabric. Background Technology

[0002] Currently, automotive tarpaulins on the market are mainly divided into two categories: PE woven laminated fabric and PVC coated fabric. High-sided trucks both domestically and internationally commonly use tarpaulin poles to reinforce the tarpaulin, but the corners of these poles are prone to wear, severely affecting the tarpaulin's lifespan. While high-grammage tarpaulins are wear-resistant, they are heavy and inconvenient to use, while low-grammage tarpaulins are lightweight but easily worn, leading to increased operating costs. Furthermore, the traditional coating process for PVC coated fabrics has significant drawbacks: the coated fabric needs to be laminated under conditions of instantaneous temperature below 160℃ and a plasticizing elongation of approximately 1 meter, and after three coatings and three baking processes, the finished fabric has poor stability, and secondary splicing is difficult due to surface exudates causing heat sealing problems.

[0003] In existing technologies, the wear-resistant layer design of PVC mesh fabric mostly adopts an overall coating method, which cannot specifically solve the wear problem at the corners; the temperature control precision in the coating process is insufficient, resulting in low bonding strength between the wear-resistant layer and the substrate. For example, in traditional processes, the heating temperature of the wear-resistant layer fluctuates greatly, making it difficult to stably reach the optimal heat sealing temperature of 155℃, and the cylinder body wrapping area is less than 1.3m², resulting in insufficient adhesion between the wear-resistant layer and the coated fabric. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the purpose of the present invention is to provide a method for producing PVC shoulder fabric, so as to at least partially solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this invention proposes a method for producing PVC shoulder-padded fabric, comprising the following steps: (1) Preheating and shaping of polyester fiber base fabric: The polyester fiber base fabric is preheated and shaped at 120°C to eliminate internal stress and improve dimensional stability.

[0006] (2) Vertical coating and drying of polyvinyl chloride paste resin: Using a vertical coating equipment, polyvinyl chloride paste resin (such as P450 type, particle size 0.5-2μm) is uniformly coated on the preheated fabric surface, and then dried at 175℃ to allow the resin to be initially plasticized.

[0007] (3) Calendering: The fabric is calendered by a calendering machine to increase the density of the fabric and improve the smoothness and gloss of the surface.

[0008] (4) Secondary application of polyvinyl chloride paste resin: Apply polyvinyl chloride paste resin again vertically to further fill the pores of the fabric and enhance its waterproofness and abrasion resistance.

[0009] (5) Thickness adjustment and secondary drying: The thickness of the fabric is monitored in real time by a laser thickness gauge, the amount of coating is adjusted to make the average weight reach the standard, and then dried again at 175°C to ensure that the resin is fully plasticized.

[0010] (6) Heat-bonded segmented wear-resistant layer: The semi-finished fabric is heated to 155°C and then heat-bonded with the PVC film sandwiched between the wear-resistant layer and the coated fabric by wrapping a cylinder with an area of ​​more than 1.3m. The wear-resistant layer adopts a segmented design at the corner of the cover fabric, with each segment being 0.5-1m long and connected by an arc transition area to enhance tear resistance.

[0011] (7) Rolling: Roll up and package the finished fabric to complete the production.

[0012] Beneficial effects: This invention precisely covers the corners and easily worn areas with a segmented wear-resistant layer, and combines it with a large-area wrapping heat-sealing process for the cylinder body, which improves the bonding strength between the wear-resistant layer and the substrate, and extends the service life by at least twice that of traditional tarpaulins. By precisely controlling the heating temperature of the wear-resistant layer to 150-155℃, surface precipitates are avoided, ensuring a strong interface bond during secondary heat sealing. The two-coat process replaces the traditional three-coat, three-bake process, reducing energy consumption; the segmented wear-resistant layer design reduces material usage and lowers overall costs.

[0013] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0014] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a schematic diagram of a method for producing PVC shoulder fabric according to an embodiment of the present invention. Detailed Implementation

[0015] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0016] The method for producing PVC shoulder fabric according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0017] Preheating and shaping: The polyester fiber base fabric is passed through a preheating oven at a speed of 5m / min and treated at 120℃ for 5 minutes to eliminate the internal stress of the fabric.

[0018] First coating and drying: Using a vertical scraper coating equipment, polyvinyl chloride paste resin (P450 type, containing 60% dioctyl phthalate and 4% barium zinc stabilizer) is coated onto the fabric surface at a rate of 300g / m², and then dried in a 175℃ hot air oven for 3 minutes, with the resin plasticization degree reaching 70%.

[0019] Calendering: The fabric is calendered using a pair of chrome-plated steel rollers (temperature 120℃, pressure 5MPa) to achieve a surface roughness Ra≤1.6μm.

[0020] Second coating and drying: Repeat step 2, adjust the coating amount to 200g / m², extend the drying time to 4 minutes, and the resin plasticization degree reaches 90%.

[0021] Thickness adjustment: A laser thickness gauge is used for real-time monitoring, and the scraper pressure is automatically adjusted through a closed-loop control system to keep the average weight of the fabric stable at 800±20g / m².

[0022] Abrasion-resistant layer bonding: The semi-finished fabric is heated to 155℃ and heat-sealed to the substrate by wrapping it with a 1.5M-sized cylinder, using a 0.3mm thick segmented abrasion-resistant layer sandwiched PVC film. The abrasion-resistant layer is divided into 3 segments at the corners, each 0.8M long, connected by an arc-shaped transition zone with a radius of 5cm. The heat-sealing pressure is 3MPa, and the time is 2 seconds.

[0023] Winding: A constant tension winding machine is used to wind at a speed of 10m / min, and the diameter of the finished fabric roll is controlled within 500mm.

[0024] The present invention will be further described below with reference to specific embodiments. These embodiments are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0025] Example 1 Preheating and setting: The polyester fiber base fabric is passed through a preheating oven at a speed of 4m / min and treated at 120℃ for 6 minutes to eliminate the internal stress of the fabric.

[0026] First coating and drying: Using a vertical scraper coating equipment, polyvinyl chloride paste resin (P450 type, containing 60% dioctyl phthalate and 4% barium zinc stabilizer) was coated onto the fabric surface at a coating amount of 280g / m², and then dried in a 175℃ hot air oven for 4 minutes, with the resin plasticization degree reaching 65%.

[0027] Calendering: The fabric is calendered using a pair of chrome-plated steel rollers (temperature 110℃, pressure 4MPa) to achieve a surface roughness Ra≤1.8μm.

[0028] Second coating and drying: Repeat the resin composition of the first coating, adjust the coating amount to 180g / m², and then dry in a 175℃ hot air oven for 5 minutes, so that the resin plasticization degree reaches 85%.

[0029] Thickness adjustment: A laser thickness gauge is used for real-time monitoring, and the scraper pressure is automatically adjusted through a closed-loop control system to keep the average weight of the fabric stable at 780±20g / m².

[0030] Abrasion-resistant layer bonding: The semi-finished fabric is heated to 155℃ and heat-sealed to the substrate by wrapping it with a 1.4M-sized cylinder, using a 0.3mm thick segmented abrasion-resistant layer sandwiched PVC film. The abrasion-resistant layer is divided into 3 segments at the corners, each 0.7M long, connected by an arc-shaped transition zone with a radius of 5cm. The heat-sealing pressure is 2MPa, and the time is 3 seconds.

[0031] Winding: A constant tension winding machine is used to wind at a speed of 9m / min, and the diameter of the finished fabric roll is controlled within 500mm.

[0032] Example 2 Preheating and setting: The polyester fiber base fabric is passed through a preheating oven at a speed of 6m / min and treated at 120℃ for 4 minutes to eliminate internal stress in the fabric.

[0033] First coating and drying: Using a vertical scraper coating equipment, polyvinyl chloride paste resin (P450 type, containing 60% dioctyl phthalate and 4% barium zinc stabilizer) is coated onto the fabric surface at a coating amount of 320g / m², and then dried in a 175℃ hot air oven for 2 minutes, with the resin plasticization degree reaching 75%.

[0034] Calendering: The fabric is calendered using a pair of chrome-plated steel rollers (temperature 130℃, pressure 6MPa) to achieve a surface roughness Ra≤1.5μm.

[0035] Second coating and drying: Repeat the resin composition of the first coating, adjust the coating amount to 220g / m², and then dry in a 175℃ hot air oven for 3 minutes, so that the resin plasticization degree reaches 95%.

[0036] Thickness adjustment: A laser thickness gauge is used for real-time monitoring, and the scraper pressure is automatically adjusted through a closed-loop control system to keep the average weight of the fabric stable at 820±20g / m².

[0037] Abrasion-resistant layer bonding: The semi-finished fabric is heated to 155℃ and heat-sealed to the substrate by wrapping it with a 1.6M-sized cylinder, using a 0.3mm thick segmented abrasion-resistant layer sandwiched PVC film. The abrasion-resistant layer is divided into 3 segments at the corners, each 0.9M long, connected by an arc-shaped transition zone with a radius of 5cm. The heat-sealing pressure is 4MPa, and the time is 1 second.

[0038] Winding: A constant tension winding machine is used to wind at a speed of 11m / min, and the diameter of the finished fabric roll is controlled within 500mm.

[0039] Example 3 Preheating and shaping: The polyester fiber base fabric is passed through a preheating oven at a speed of 5m / min and treated at 120℃ for 5 minutes to eliminate the internal stress of the fabric.

[0040] First coating and drying: Using a vertical scraper coating equipment, polyvinyl chloride paste resin (P450 type, containing 60% dioctyl phthalate and 4% barium zinc stabilizer) is coated onto the fabric surface at a rate of 300g / m², and then dried in a 175℃ hot air oven for 3 minutes, with the resin plasticization degree reaching 70%.

[0041] Calendering: The fabric is calendered using a pair of chrome-plated steel rollers (temperature 120℃, pressure 5MPa) to achieve a surface roughness Ra≤1.6μm.

[0042] Second coating and drying: Repeat the resin composition of the first coating, adjust the coating amount to 200g / m², and then dry in a 175℃ hot air oven for 4 minutes, so that the resin plasticization degree reaches 90%.

[0043] Thickness adjustment: A laser thickness gauge is used for real-time monitoring, and the scraper pressure is automatically adjusted through a closed-loop control system to keep the average weight of the fabric stable at 800±20g / m².

[0044] Abrasion-resistant layer bonding: The semi-finished fabric is heated to 155℃ and heat-sealed to the substrate by wrapping it with a 1.5M-sized cylinder, using a 0.3mm thick segmented abrasion-resistant layer sandwiched PVC film. The abrasion-resistant layer is divided into 3 segments at the corners, each 0.8M long, connected by an arc-shaped transition zone with a radius of 5cm. The heat-sealing pressure is 3MPa, and the time is 2 seconds.

[0045] Winding: A constant tension winding machine is used to wind at a speed of 10m / min, and the diameter of the finished fabric roll is controlled within 500mm.

[0046] The following is a comparison table of the PVC shoulder-padded fabric products tested in the above embodiments:

[0047] Through experimental comparison, Example 3 was found to be the optimal example. Its performance indicators are balanced and excellent, ensuring product quality while also considering production efficiency and cost control.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method of producing PVC shoulder strap fabric, characterized by, The method comprises the following steps: (1) preheat and set the polyester fiber base cloth at 100-120℃; (2) vertically coat and scrape polyvinyl chloride paste resin, and dry at 150-175℃; (3) perform calendering treatment on the cloth through a calendering machine; (4) coat and scrape polyvinyl chloride paste resin again, and dry at 150-175℃; (5) monitor the thickness of the cloth in real time through a laser thickness gauge, adjust the average gram weight, and dry again at 150-175℃ to form a semi-finished product; (6) heat the semi-finished product cloth to 150-155℃, and paste the segmented wear-resistant layer shoulder PVC film through a cylinder with a wrapping area of >1.3m.

2. The PVC shoulder strap production method according to claim 1, characterized in that, In step (2), during the vertical coating and scraping process, the polyvinyl chloride paste resin is uniformly coated on the surface of the preheated cloth, and then dried at 150-175℃ to preliminarily plasticize the resin.

3. The method of claim 2, wherein, The polyvinyl chloride paste resin has a particle size of 0.5-2μm and a plasticizer content of 60%-70%.

4. The PVC shoulder strap production method according to claim 1, characterized in that, In step (3), the calendering treatment adopts chromium-plated steel rollers, with a temperature of 100-130℃ and a pressure of 3-6MPa.

5. The PVC shoulder strap production method according to claim 1, characterized in that, In step (6), the segmented wear-resistant layer is divided into multiple segments at the cover cloth corner positions, with a length of 0.5-1m per segment, and connected through arc transition zones.

6. The PVC shoulder strap production method according to claim 1, characterized in that, In step (6), the heating temperature control precision of the cylinder is ±2℃, and the heat sealing pressure is 2-4MPa.

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