PP plastic, chemical name: polypropylene English name: Polypropylene (referred to as PP). Specific gravity: 0.9-0.93 g/cm3 Molding shrinkage rate: 1.0-2.5% Molding temperature: 160-220℃. PP is a crystalline polymer, and the overall performance of PP is better than that of PE. PP products are light in weight, good in toughness, and good in chemical resistance. Disadvantages of PP: low dimensional accuracy, insufficient rigidity, poor weather resistance, it has post-shrinkage phenomenon, after demolding, it is easy to age, become brittle, and easy to deform.
In daily life, common products are: basins, barrels, furniture, films, fresh-keeping boxes, woven bags, bottle caps, car bumpers, etc. are all made of PP materials.
Polypropylene PP sheet is heat-resistant, impact-resistant, non-toxic, and odorless. It is currently one of the engineering plastics that meets environmental protection requirements. It has become the object of choice for the public, thus realizing its use-value, and the continuous development of society has also driven it. development of.
Because of its high strength, rigidity, hardness, high melting point, non-flammability, insulation, heat insulation, and moisture-proof characteristics, PP board has a wide range of applications in the chemical, food, and electronics industries. Zhihong PP board manufacturer specializes in the production of various types of PP boards, which can be divided into the following three types according to the thickness of the PP board.
The first is a relatively thin PP board with a thickness of only 3-30 mm. This type of board is generally used for food packaging, such as the transparent food packaging shell used in many supermarkets. Sexual water cups or more convenient small storage boxes are used for this kind of thinner plates.
The second type is a sheet with a thickness of 0.5-0.8 mm. This kind of sheet is mainly used for environmental protection. As an environmentally friendly treatment material, it can be immersed in water for 7-8 years without deformation.
The third type is a thicker PP sheet, this kind of housing is used in industry.