The color is yellowish translucent, shiny. Transparency is better than polyethylene, PVC Plastic Bags polypropylene, polystyrene, with different dosage of additives, divided into soft and hard polyvinyl chloride, soft products and toughness, feel sticky, hard products hardness is higher than low density polyethylene, PVC Plastic Bags and lower than polypropylene, in the bending place will appear bleaching phenomenon. Common products: plates, tubes, soles, toys, doors and windows, wire skin, stationery and so on. A polymer material that uses a chlorine atoms to replace a hydrogen atom in polyethylene.
PVC (PVC) Chemical and physical properties of rigid PVC is one of the most widely used plastic materials. PVC material is a kind of non crystalline material. PVC materials are often used in the actual use of stabilizers, lubricants, auxiliary processing agents, color materials, PVC Plastic Bags anti-impact agents and other additives.
PVC material has the properties of non-flammable, high strength, weather resistance and excellent geometrical stability. PVC has a strong resistance to oxidants, reducing agents and acid. PVC Plastic Bags However, it can be corroded by concentrated sulfuric acid, concentrated nitric acid, PVC Plastic Bags and also does not apply to the occasion of contact with aromatic hydrocarbons and chlorinated hydrocarbons.
The melting temperature of PVC during processing is a very important process parameter, if this parameter is improper, it will cause the problem of material decomposition. PVC Plastic Bags The flow characteristic of PVC is very poor, and its process range is very narrow. Especially, the large molecular weight of PVC material is more difficult to process (this material is usually added to the lubricant to improve the flow characteristics), PVC Plastic Bags so usually used in small molecules of PVC material. PVC shrinkage Rate is very low, generally 0.2~0.6%.
Runner and gate: All conventional gate gates are available. If the smaller parts are machined, it is advisable to use a needle-shaped gate or a submerged gate, preferably a fan-shaped gate for thicker parts. The minimum diameter of the needle-shaped gate or submerged gate should be 1mm, and the thickness of the fan gate should not be less than 1mm.
Typical use of water pipelines, household pipelines, housing wall panels, PVC Plastic Bags commercial machinery shell, electronic products packaging, medical equipment, food packaging.
PVC can be divided into soft PVC and hard PVC. The hard PVC accounted for about 2/3 of the market, soft PVC accounted for 1/3. Soft PVC is commonly used in flooring, ceilings and leather surface, but because soft PVC contains softener (which is also the difference between soft PVC and hard PVC), PVC Plastic Bags easy to brittle, not easy to save, so its scope of use has been limited. Hard PVC does not contain softener, so flexibility is good, easy to shape, not easy to crisp, non-toxic non-polluting, long save time, PVC Plastic Bags so has a great development and application value. Hereinafter referred to as PVC. The essence of PVC is a vacuum blister film, used for all kinds of panel surface packaging, so also known as decorative film, adhesive film, used in building materials, packaging, medicine and many other industries. Building materials industry accounted for the largest proportion, 60%, followed by the packaging industry,PVC Plastic Bags there are a number of other small-scale applications of the industry.
The burning characteristic of polyvinyl chloride is that it is hard to burn, fire is extinguished, the flame is yellow, white smoke, and the pungent smell of chlorine when the plastic becomes soft when burning.
Polyvinyl chloride resin is a multi-component plastic, PVC Plastic Bags according to different uses can be added to different additives, so with the composition of the different products can be presented in different physical and mechanical properties, such as adding or not adding plasticizers can make it have soft hard products. In general, PVC products have chemical stability, flame-resistant self quenching, wear-resisting, noise elimination shock, high strength, better electrical insulation, low cost and wide range of materials, PVC Plastic Bags airtight performance and other advantages. Its disadvantage is the thermal stability can be poor, by light, heat, oxygen, the role of easy aging. PVC resin itself is non-toxic, if the use of non-toxic plasticizers, PVC Plastic Bags stabilizers and other auxiliary materials made of products, harmless to animals and humans. However, generally in the market see the polyvinyl chloride products used in plasticizers, stabilizers are mostly poisonous, PVC Plastic Bags so in addition to the non-toxic formula of products, can not be used to dress up food.