The main types of adhesives and application
Date:
2013-11-29
Views:
122
According to incomplete statistics, so far, more than 6000 kinds of adhesive products come out, because of its wide variety of different components, there is no uniform classification.
Urea-formaldehyde resins, phenolic, melamine - formaldehyde adhesive: mainly used for wood processing industry, after the use of formaldehyde emission higher than international standards.
Polyacrylate resin: mainly used to produce pressure-sensitive adhesives, also used in the textile and construction sectors. In recent years, domestic companies from abroad several pressure-sensitive adhesive production lines, to promote the development of domestic polyacrylate resin production technology.
Polyurethane Adhesive: can bond a variety of materials, after bonding at low temperature or cryogenic still maintain the physical and chemical properties of the material, mainly used in shoe-making, packaging, automotive, magnetic recording materials. In recent years, domestic polyurethane adhesive with an average 30% annual growth rate. China now has about 170 plants in the production of more than 100 different specifications of such adhesives.
Hot melt adhesive: According to different raw materials can be divided into EVA hot melt adhesive, polyamide hot melt adhesives, polyester adhesives, hot melt adhesive, such as polyolefins. At present, the major domestic production and use of the EVA hot melt adhesives. Polyolefin adhesives main raw material is ethylene series, SBS, SIS copolymer.
Epoxy Adhesive: can between the metal and most non-metallic materials for bonding, widely used in construction, automotive, electronics, electrical appliances and daily household goods aspects. Domestic production of epoxy resin adhesives factory has more than 100, more dispersed distribution, annual production of about 10,000 tons.
Silicone Adhesives: a seal adhesive with cold, heat aging resistance, waterproof, moisture-proof, scalable high fatigue strength, permanent deformation, non-toxic and so on. In recent years, the rapid development of such adhesives in the country, but part of our raw materials are imported silicone adhesive.
Synthetic adhesives: mainly used for wood processing, construction, decoration, automotive, footwear, packaging, textiles, electronics, printing and binding and other fields. At present, China's annual imports of synthetic adhesives nearly 20 million tons of varieties, including hot melt adhesives, silicone sealants adhesives, polyacrylic adhesives, polyurethane adhesives, automotive adhesives, PVC plastic. Meanwhile, the annual export of synthetic adhesives about 20,000 tons, mainly polyvinyl acetate, polyvinyl formals and acid-sensitive adhesives.
Woodworking Adhesives: for medium density fiberboard, gypsum board, plywood and particleboard.
Construction adhesive: mainly used for bonding construction decoration, seal or structure. With the development of the construction industry, high-rise buildings, the development needs of interior decoration, building a sharp increase in the amount of adhesive. Our construction adhesive consumption is about 600,000 tons. But experts believe that China needs such adhesive product structure adjustment. In China, building decorative adhesive such as polyvinyl acetate, polyacrylic acid, VAE emulsion can basically meet the needs, but building sealing adhesives, structural adhesives need some imported from abroad.
Sealing Adhesives: mainly used to connect at doors, windows and prefabricated houses preform. Past after mixing with tung oil and lime as a sealant, now provides more than two buildings must be synthetic adhesives. High-grade silicone adhesive seal and polyurethane adhesives, mid-range of neoprene adhesives, polyacrylic acid. In China, building on the adhesives market, silicone adhesives, polyurethane adhesive seal should be the direction of future development, the current sales of its occupied building sealing adhesive is about 30%.
Building Construction Adhesives: mainly used for connection between the structural units. External repair of reinforced concrete structures such as metal reinforcement and fixed-site construction building, generally considered epoxy resin adhesive.
Automotive Adhesives: divided into four kinds, namely the body to use, interior decoration, the windshield and the body chassis with adhesive. At present, China's annual consumption of automotive adhesives about 4 million tons, the largest of which is the use of PVC plastic adhesive, neoprene adhesives and adhesive asphalt series.
Shoe adhesives: Annual consumption is about 125,000 tons, of which neoprene adhesives require 110,000 tons, about 15,000 tons of polyurethane adhesives. Because neoprene adhesives required benzene as a solvent, and benzene harmful, should be limited to the development, so as to meet the development needs of the footwear industry, the use of polyurethane adhesives will be the direction of the series.
Packaging Adhesives: mainly for the production of pressure sensitive adhesive tape and pressure-sensitive labels, the surface of the packaging material of paper, plastic, metal or the like for bonding. Paper packaging material for polyvinyl acetate emulsion adhesive. Plastic and metal packaging materials Adhesives for polyacrylic acid emulsion, VAE emulsion, polyurethane adhesives and cyanoacrylate adhesives.
Electronic Adhesives: consumption of less than 10,000 tons per year at present, mostly for integrated circuits and electronic products, are mainly used epoxy resin, unsaturated polyester resins, silicone adhesive. Capped for 5 micron thick adhesive electronic components, we can supply ourselves, but 3 microns thick electronic components to be imported from abroad, with the adhesive.