Natural color is yellowish translucent, shiny. Transparency is better than polyethylene, polypropylene, worse than polystyrene, PVC Plastic Bags with the amount of different additives, divided into soft, PVC Plastic Bags hard polyvinyl chloride, soft soft and tough, feel sticky, hard hardness is higher than low-density polyethylene, And lower than the polypropylene, in the inflection will appear whitening phenomenon. PVC Plastic Bags Common products: sheet, pipe, soles, toys, doors and windows, wire sheath, stationery and so on. Is a polymer material that uses a chlorine atom to replace one hydrogen atom in polyethylene.
PVC (polyvinyl chloride) chemical and physical properties Rigid PVC is one of the most widely used plastic materials. PVC material is a non-crystalline material. PVC materials in the actual use of often added stabilizers, PVC Plastic Bags lubricants, auxiliary processing agents, colorants, impact agents and other additives.
PVC material with non-flammability, high strength, weather resistance and excellent geometric stability. PVC has a strong resistance to oxidants, reducing agents and strong acids. However, PVC Plastic Bags it can be strongly oxidized acid such as concentrated sulfuric acid, concentrated nitric acid corrosion and does not apply with aromatic hydrocarbons, chlorinated hydrocarbons in contact with the occasion.
PVC melting temperature during processing is a very important process parameters, PVC Plastic Bags if this parameter will lead to improper decomposition of the material. PVC flow characteristics are quite poor, the process range is very narrow. In particular, large molecular weight PVC materials are more difficult to process (this material is usually added to the lubricant to improve the flow characteristics), PVC Plastic Bags so are usually used are small molecular weight PVC material. PVC shrinkage is quite low, generally 0.2 to 0.6%.
Runners and gates: All conventional gates are available. PVC Plastic Bags If smaller parts are machined, it is advisable to use needle tip gates or submersible gates; for thicker parts, it is best to use fan-shaped gates. The minimum diameter of the needle tip or submersible gate shall be 1 mm; the thickness of the fan gate shall not be less than 1 mm.
Typical use of water pipes, household pipes, PVC Plastic Bags housing wall panels, commercial machine shell, electronic product packaging, medical equipment, food packaging.
PVC can be divided into soft PVC and hard PVC. Which accounted for about 2/3 of the hard PVC market, soft PVC accounted for 1/3 Soft PVC is generally used for flooring, PVC Plastic Bags ceilings and leather surface, but because soft PVC contains softener (which is the difference between soft PVC and hard PVC), easy to become brittle, PVC Plastic Bags easy to save, so its use has been limited. Hard PVC does not contain softener, so flexible, easy to shape, not brittle, non-toxic and pollution-free, long storage time, so it has great development and application value. Hereinafter referred to as PVC. The essence of PVC is a vacuum plastic film, used for all kinds of panel surface packaging, it is also known as decorative film, with film, used in building materials, packaging, PVC Plastic Bags medicine and many other industries. Which accounted for the largest proportion of building materials industry, 60%, followed by the packaging industry, there are several other small-scale application of the industry.
Polyvinyl chloride combustion characteristics, flame retardant, from the fire that is off, the flame was yellow, white smoke, burning green when the plastic issued a stimulating taste of chlorine.
Polyvinyl chloride resin is a multi-component plastic, according to different uses can be added to different additives, so with the composition of different products can show different physical and mechanical properties, such as adding or without adding plasticizer can make it There are hard and soft products of the points. PVC Plastic Bags In general, PVC products are resistant to chemical stability, flame self-extinguishing, wear, muffler shock, high strength, good electrical insulation, inexpensive and wide material sources, PVC Plastic Bags good air tightness and other advantages. The disadvantage is poor thermal stability, by the light, heat, oxygen, easy to 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 humans and animals. However, generally seen in the market of PVC products used plasticizers, stabilizers are mostly toxic, so in addition to marked non-toxic formula products, can not be used to dress food.