(1) Physical properties: Polypropylene is a non-toxic, odorless, tasteless, milky white high crystalline polymer with a density of only 0.90~.091g/cm3, which is one of the lightest varieties of all plastics. It is particularly stable to water, with a water absorption rate of only 0.01% in water and a molecular weight of about 8 to 150,000. Good formability, but due to the large shrinkage rate, thick-walled products are easy to sag. The surface of the product is glossy and easy to color.
(2) Mechanical properties: Polypropylene has high crystallinity and regular structure, so it has excellent mechanical properties. Its strength, hardness and elasticity are higher than HDPE, but at room temperature and low temperature, due to its high molecular structure regularity, Therefore, the impact strength is poor, and when the molecular weight is increased, the impact strength is also increased, but the molding processability is deteriorated. The most outstanding performance of PP is the resistance to bending fatigue. For example, PP is used as a living hinge to withstand bending and bending of 7×107 times without damage. The coefficient of dry friction is similar to that of nylon, but it is not as good as oil lubrication. nylon.
(3) Thermal properties: PP has good heat resistance, melting point is 164~170 °C, and the product can be sterilized and sterilized at temperatures above 100 °C. It is not deformed at 150 °C without external force. The embrittlement temperature is -35 ° C, embrittlement occurs below -35 ° C, and the cold resistance is not as good as polyethylene.
Please feel free to contact us if you have any problems.
Xiamen LFT Composite Plastic Co.,Ltd
Candy Hu
Email: candyhu@lfrtplastic.com
Tel : 0086-186-5906-9962 (wechat/whatsapp)
Skype:candy328520
Address : No. 27,Hongxi Road, Ma xiang town, Xiang 'an district, Xiamen(361000),China
