Polyvinyl chloride PVC resin plastic

Polyvinyl chloride (PVC), is vinyl chloride monomer (VCM) in the peroxide, azo compounds and other initiator or under the action of light, heat according to the free radical polymerization reaction mechanism polymerization of polymer. Vinyl chloride homopolymer and vinyl chloride copolymer are called vinyl chloride resin.
PVC for the amorphous structure of white powder, branching degree is small, glass temperature 77~90℃, 170℃ or so began to decompose, poor stability of light and heat, at more than 100℃ or after a long time of sun exposure, will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, cause discoloration, physical and mechanical properties are rapidly declining, In practice, stabilizer must be added to improve heat and light stability.

1. PVC profile
Profile, profile is the biggest field of PVC consumption in our country, about 25% of the total consumption of PVC, mainly used in the production of doors, Windows and energy-saving material, its application amount still has a significant increase in the national scope. The market share of plastic doors and Windows is also the highest in developed countries, such as Germany with 50 percent, France with 56 percent, and the United States with 45 percent.
2. PVC pipe
Among the many PVC products, PVC pipeline is the second largest consumption area, accounting for about 20% of its consumption. In our country, PVC pipe is developed earlier than PE pipe and PP pipe, many varieties, excellent performance, wide range of use, occupies an important position in the market.
3. Polyvinyl chloride film
PVC film field of PVC consumption ranked third, accounting for about 10%. PVC mixed with additives, plasticizing, the use of three or four roller rolling mechanism into a specified thickness of transparent or colored film, with this method processing film, become calendering film. Can also be cut, thermal processing packaging bags, raincoats, tablecloths, curtains, inflatable toys and so on. Wide transparent film can be used for greenhouse, plastic greenhouse and plastic film. After bidirectional stretching of the film, the property of heat shrinkage, can be used for shrink packaging.
4.PVC hard materials and plates
PVC added stabilizer, lubricant and filler, after mixing, with extruder can extrude a variety of caliber of hard pipe, special-shaped pipe, bellows, used as a downpipe, drinking pipe, wire sleeve or stair handrail. Overlapping hot pressing of the calendered sheet can make hard sheets of various thicknesses. The plate can be cut into the desired shape, and then the use of PVC electrodes with hot air welding into a variety of chemical corrosion resistant storage tanks, air ducts and containers.
5.PVC general soft product
The extruder can be used to squeeze into hose, cable, wire, etc.; Plastic sandals, soles, slippers, toys and auto parts can be made by injection molding machine with various molds.
6. Polyvinyl chloride packaging material
PVC products are mainly used for packaging containers, films and hard sheets. PVC containers mainly produce mineral water, beverages, cosmetics bottles, but also used for refined oil packaging. PVC film can be used for co-extrusion with other polymers to produce low cost laminated products, and transparent products with good barrier property. PVC film can also be used in stretch or heat shrink packaging for mattresses, cloth, toys and industrial goods.
7. PVC wainscoting and flooring
PVC wainscoting is mainly used to replace aluminum wainscoting. In addition to a part of PVC resin, the remaining components of PVC floor tile are recycling materials, adhesives, fillers and other components, mainly used in the airport terminal floor and other places of the hard ground.
8. Polyvinyl chloride for daily consumption
Duffel bags are traditional products made from polyvinyl chloride, which is used to make all kinds of imitation leather for duffel bags and sports products, such as basketball, football and football. It can also be used to make belts for uniforms and special protective equipment. PVC fabrics for clothing are generally absorbent fabrics (do not need coating), such as ponchos, baby pants, imitation leather jackets and various rain boots. PVC is used in many sports and entertainment products, such as toys, records and sporting goods. PVC toys and sporting goods have a large growth range, because of its low production cost and easy molding.
9.PVC coated products
The artificial leather with the substrate is PVC confused on cloth or paper, and then plasticized at more than 100℃. Can also be PVC and auxiliary calendering film, and then pressed together with the substrate. The artificial leather without substrate is directly calendered by the calendering machine into a certain thickness of soft sheet, and then pressed on the pattern. Artificial leather can be used to make suitcases, bags, book covers, sofas and car cushions, and floor leather, used as a building floor material.
10.PVC foam products
Soft PVC mixing, add appropriate amount of foaming agent to do sheet material, foam molding for foam plastic, foam slippers, sandals, insoles, and shockproof buffer packaging materials. Can also be extruded into low foaming hard PVC sheet and profile, can replace the use of wood, is a new type of building material.
11.PVC transparent sheet
PVC add impact modifier and organic tin stabilizer, after mixing, plasticizing, calendered and become transparent sheet. The use of hot forming can be made into thin-walled transparent containers or used for vacuum blister packaging, is an excellent packaging materials and decorative materials.
12. Other
Doors and Windows have hard special-shaped materials assembled from. In some countries has been with wood doors and Windows aluminum Windows and other common doors and Windows market; Imitation wood materials, generation steel building materials (north, seaside); Hollow container.
Virtual circuit is one of the packet switching network services (the other is a datagram service), in a nutshell, is the internal control mechanism, through the network to build a virtual logical connection between the user host, and the validity of the guarantee in the upload messenger bag and sequentiality, before and after the communication for the establishment of virtual circuit and removal. A permanent virtual circuit is a virtual circuit that is established during network initialization and remains. PVC services are available on both X.25 networks and B-ISDN. PVC plastic bags are generally prohibited.

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