A textile enterprise specializing in fabric R & D, production and trade.
Pvc Coated Fabric Manufacturers introduces 2 technologi […]
Pvc Coated Fabric Manufacturers introduces 2 technologies used in coated fabrics:
1. Nanosol coating technology
Technology can produce a transparent coating effect containing metal oxides or silicon oxide films. In SOL-GEL technology, nano sold of silicon oxide or other metal oxides is prepared by acidic or alkaline hydrolysis of alkoxides. The produced nano sol generally contains 3%-20% (calculated by weight) of metal oxide, and the diameter of the particles is less than 10 nanometers. The aggregation and aggregation of nanoparticles will form a three-dimensional network structure. After dot coating, spray coating, and continuous coating, a solvent-containing sol layer is formed on the surface of the textile. After drying and heat treatment, the dry gel-containing layer is removed from The coating solvent, forming a porous structure.
Modification of nano-sol by chemical and physical methods can change the functionality of the coating. For example, the use of trialkoxysilyl or perfluoroalkyl for chemical modification treatment can produce hydrophobicity or oleophobicity. Larger molecules such as dyes and bioactive agents can be directly covalently bonded after chemical modification. Physical modification is to evenly fix various functional additives on the metal oxide substrate to improve light fastness, stability to ultraviolet light, abrasion fastness, antistatic, and flame retardancy. At present, plasma treatment technology is also used for fiber surface modification, such as improving fiber strength, improving the durability of adhesive bonding in finishing and coating, and enhancing lamination and adhesion performance.
2. Silicone coating finishing technology
The best silicone coating can increase the tear resistance of the fabric by more than 50%. The silicone elastomer coating has high flexibility and low elastic modulus, allowing yarn to migrate and form yarn bundles when the fabric is torn. The tearing strength of general fabrics is always lower than the tensile strength. However, when there is a coating, the yarn can move at the tearing extension point, and two or more yarns push each other to form a yarn bundle and significantly improve the resistance. Tearing. The main supplier of silicone coatings, the German Wick Company, chemically modifies liquid silicone rubber with other polymers, such as polyurethane or acrylate, so that the textile does not absorb too much moisture to prevent leaching Wetness and weight gain more. The organic silicon rubber layer can filter out most of the harmful ultraviolet rays in the sun and has a soft hand feeling. Silicone coatings are now used in airbag fabrics, hot air balloons, paragliders, spinnakers, tents, sleeping bags, and many high-performance sports and leisure fabrics.