What is the characteristic performance of pvc plastic bags? What is the classification of pvc plastic bags? PVC bags are widely used as stationery bags, PVC Plastic Bags cosmetic bags, clothing bags, metal bags, jewelry bags and other products packaging. Many high-end manufacturers will use PVC bags to packaging, PVC transparent, PVC Plastic Bags beautiful, enhance product quality.
Natural color is yellowish translucent, shiny. Transparency is better than polyethylene, polypropylene, worse than polystyrene, with the amount of different additives, divided into soft, 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. Common products: sheet, pipe, PVC Plastic Bags soles, toys, doors and windows, wire sheath, stationery and so on. Is a polymer material that uses a chlorine atom to replace one of the hydrogen atoms in the 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, lubricants, auxiliary processing agents, PVC Plastic Bags colorants, impact agents and other additives.
PVC material with non-flammable, PVC Plastic Bags high strength, weather resistance and excellent geometric stability. PVC has a strong resistance to oxidants, reducing agents and strong acids. However, it can be concentrated oxide 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, 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 improve the flow characteristics of lubricants), 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. If smaller parts are machined, it is advisable to use needle tip gates or submersible gates; for thicker parts, PVC Plastic Bags 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, ceilings and leather surface,PVC Plastic Bags but because soft PVC contains softener (which is the difference between soft PVC and hard PVC), easy to become brittle, easy to save, so its use has been limited. Hard PVC does not contain softener, so flexible, PVC Plastic Bags easy to shape, not brittle, non-toxic and pollution-free, PVC Plastic Bags 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,PVC Plastic Bags packaging, medicine and many other industries. Which accounted for the largest proportion of building materials industry, 60%, followed by the packaging industry, PVC Plastic Bags there are several other small-scale application of the industry.