What kind of fabric is PVC composite fabric? -- Guangyuan Ruifeng New Materials

Category: PVC composite fabric

Release Time: 2020-06-08

Summary: What kind of fabric is PVC composite fabric? Composite fabrics are widely used in car seat cushions, wallpapers, non-woven fabrics, etc., and are also used in China's medical and health departments. With the maturity of the primary processing technology of non-woven fabrics, more and more enterprises are turning their attention to the deep processing of non-woven fabrics, so as to maximize the added value of products and the profits of enterprises.

What is PVC composite fabric? Composite fabrics are widely used in car seat cushions, wallpapers, non-woven fabrics, etc., and are also used in China's medical and health departments. With the maturity of non-woven fabric primary processing technology, more and more enterprises are turning their attention to the deep processing of non-woven fabrics, so as to maximize the added value of products and the profits of enterprises. (Crosslinking agents used in PVC composite fabrics, crosslinking agent manufacturers, PVC adhesion promoters)

In China, the application fields of hot melt adhesive coating equipment have also been continuously expanded. The medical and health materials production departments are the industries with the widest use of this type of equipment. The rapid development of the automobile industry in China has also driven the demand for hot melt adhesive coating equipment from parts manufacturers. Relevant data show that the domestic geotextile industry recently introduced the first hot melt adhesive production line. As a mature and continuously developing technology, hot melt adhesive coating technology will have an increasingly bright future in the deep processing industry of non-woven fabrics.

Disposable medical supplies (such as surgical gowns, surgical sheets, wet wipes, gloves, shoes, hats, etc.), industrial protective products, and personal care products mainly use non-woven fabric composite film products. The requirements of these industries for products are almost the same, namely, waterproofness, breathability, and comfort.

1. Lamination

This technology is the most widely used method by domestic enterprises. Features: simple, mature process, and fast production speed (about 100m/min). Disadvantages: cannot be used for products with breathability requirements; hard feel, poor comfort; high requirements for non-woven fabrics. Low grammage (below 18gsm) and low coating amount (below 15gsm) non-woven fabrics have unsatisfactory lamination effects because the unevenness of the surface of the roll material makes the lamination process prone to pinholes. (Crosslinking agents used in PVC composite fabrics, crosslinking agent manufacturers, PVC adhesion promoters)

2. Hot rolling

This is the standard process for manufacturing SMS non-woven fabrics using a two-step method. Many domestic enterprises use this process for the composite manufacturing of films and fabrics. Features: existing equipment and processes can be used. Disadvantages: the film is made of PE, while the non-woven fabric is made of polypropylene, and their melting points are different, so the temperature of the hot rolling mill cannot be considered at the same time; the heat capacity problem of the hot rolling mill causes the composite strength uniformity of the product to be poor at the same temperature and different production speeds; the processing accuracy of the hot rolling calender is also a factor affecting product quality; the hot rolling method has a higher air permeability loss rate for breathable membrane materials (between 30-40%); the production speed is slower.

3. Powder composite

A method in which hot melt adhesive powder is evenly sprinkled on non-woven fabric or film, and then compounded through heat. Features: the use of rubber rollers and smooth rollers for thermal pressure rollers causes minimal damage to the materials. Disadvantages: slow production speed, low production efficiency; the even sprinkling of hot melt adhesive powder is the key to the quality of the product, but the hygroscopicity of hot melt adhesive powder makes even sprinkling quite difficult, and the sprinkling amount is difficult to control; the melting temperature of hot melt adhesive powder is high, and the melting temperature of breathable membrane is low. During compounding, the hot melt adhesive powder cannot be completely melted, resulting in insufficient peel strength and poor surface smoothness of the composite film.

4. Hot melt adhesive breathable coating composite

Features: fast production speed, low air permeability loss rate of breathable membrane materials (between 20-30%). Disadvantages: large equipment investment (a hot melt adhesive breathable coating composite hot melt adhesive system with an effective width of 1600mm costs more than US$400,000); high grammage of adhesive coating (for example, with an angle of 180°, and a strength of 3.0N/inch composite requirements, the adhesive usage reaches 4gsm or more); during coating, the coating head needs to contact the coating material, and the stability and flatness of the winding and unwinding equipment are required; the coating process applies a large tension to the material, while the non-woven fabric and film require operation under very low tension, otherwise it is easy to cause stretching deformation of the material, wrinkling of the composite product, thus affecting the product quality; the operation adjustment is more complex: non-woven fabrics and films cannot withstand high temperatures, while the working temperature of hot melt adhesive is basically 150 degrees Celsius or higher, low-speed operation is easy to cause material burning, resulting in production stoppage and increased waste products. (Crosslinking agents used in PVC composite fabrics, crosslinking agent manufacturers, PVC adhesion promoters)

Keywords: What kind of fabric is PVC composite fabric? -- Guangyuan Ruifeng New Materials

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