The strength of PP increases with the increase of ethylene content.The vica softening temperature of PP is 150℃.Due to its high crystallinity, the material has good surface stiffness and scratch resistance.Environmental stress cracking does not exist in PP.Generally, PP is modified by adding fiberglass, metal additives or thermoplastic rubber.

The turnover rate of PP ranges from 1 to 40.PP materials with low MFR have better impact resistance but lower tensile strength.For the same MFR material, the strength of the copolymer type is higher than that of the homopolymer type.As a result of crystallization, PP shrinkage is quite high, generally 1.8-2.5%.And the directional uniformity of shrinkage ratio is much better than pe-HD and other materials.The shrinkage rate can be reduced to 0.7% by adding 30% glass additive.Homopolymer and copolymer PP materials have excellent resistance to moisture absorption, acid and alkali corrosion, and solubility.However, it has no resistance to aromatic hydrocarbon (such as benzene) solvents, chlorinated hydrocarbon (carbon tetrachloride) solvents, etc.PP is also not like PE at high temperature still has antioxidant properties.

Ii. PP plastic board parameters 1. Alias: PP board, PP board, PP cutting board, PP cutting board, punching plate, punching pad keywords: PP board, PP board, PP cutting board, PP cutting board 2. Product specification thickness: 1-15mm, maximum width: 1500mm Thickness: 15-30mm, maximum width: 1300mm Thickness: 30-60mm, maximum width: 1100mm 3, PP plastic board density is how many PP plastic board relative density is small, only 0.89-0.91, is one of the lightest plastic varieties. 4, PP plastic board can do cutting board plastic cutting board with polypropylene (PP plastic), polyethylene, etc., although the weight is lighter, easy to carry, but easy deformation, high temperature, not suitable for cutting some fat big food, otherwise it is difficult to clean.Some plastic cutting board with rough texture, it is easy to cut out slag foam, with food into the human body, liver and kidney damage;A few color send deep plastic cutting board, it is to make with waste plastic place more, harmful material is more, the plasticizer such as lead, cadmium in some cutting board contains, use for a long time even carcinogenic danger.So plastic cutting boards are best to choose translucent color, good quality, uniform color, no impurities and pungent smell of plastic cutting boards. For more information on polypropylene, visit the Changyi New Materials website at http://www.cynew.com or call 400-8339-008/139 2577 5994/137 9485 0235 The copyright belongs to the author. Commercial reprint please contact the author for authorization, non-commercial reprint please indicate the source, thank you for your cooperation.