The company's long-term brand:: mechanical properties 】 【 thecrystallinity of polypropylene is high, the structure is neat, andit has excellent mechanical properties, its elastic strength andhardness is higher than HDPE, but at room temperature and lowtemperature, due to the molecular structure of the blocking highitself, the impact strength can be affected, the molecular weightincreased, also increased the impact strength, have been moldingprocessability, PP (polypropylene) is the most prominentperformance is the resistance to bending, such as hinge with PPinjection one activity, can withstand the 7 times the 107 openingand closing bending without damage, dry friction coefficient andnylon, but under the lubricating oil nylon, hence the name twistand glue.[thermal performance] : PP has good heat resistance, themelting point is 164-170 degrees, the product can be sterilized atmore than 100 degrees temperature, in the impact of external force150 degrees will not change the shape of the product, the catalytictemperature is minus 35 degrees, at less than minus 35 degrees,polypropylene will be catalyzed, cold resistance as polyethylene.:chemical stability 】 【 polypropylene with good chemical stability,in addition to the concentrated sulfuric acid, nitric acid erosion,for other chemicals are stable, but low molecular weight fattyhydrocarbon, aromatic hydrocarbon, such as chlorinated hydrocarbonscan make PP softening and swelling, and at the same time, thechemical stability of polypropylene with the increase of thecrystallinity increased, so the polypropylene suitable for chemicalpipe and fittings, anti-corrosion effect is good.[electrical] :polypropylene high frequency electrical insulation good, because itis not bibulous, basic insulation is not affected by humidity,polypropylene have higher dielectric coefficient, increase withincreasing temperature can be used to make thermal insulationproducts, polypropylene high breakdown voltage, suitable forelectrical accessories, auto interior, resistance to voltage, arcresistance, polypropylene and copper contact will be aging, theformation of copper pollution.
