Polypropylene resin is an important variety of classes of polyolefin resin, as well as polyethylene resin, and general resin are big, many varieties, wide application range, relatively fast development of a resin.
Polypropylene resin can be divided into homopolymer and copolymer.
Homopolymer is composed of propylene monomer polymerization;
Copolymer is composed of propylene with other monomer polymerization, copolymerization of vinyl copolymer mainly with product.
Polypropylene molecular in CH3 groups according to their arrangement in space, is divided into isotactic polypropylene, syndiotactic polypropylene and atactic polypropylene.
Polypropylene, we usually say is refers to the current application of isotactic polypropylene.
The performance characteristics of polypropylene (1) polypropylene is a kind of milky white wax, non-toxic, tasteless, is the lightest of plastic varieties -
(2) polypropylene easy burning, burning out there is a kind of oil taste.
(3) have good mechanical properties, impact resistance, rigidity, wear-resisting performance is excellent, and the hardness is higher.
(4) good heat resistance, can be continuous in 0
100 ℃ temperature range is used, but the cold resistance is poor.
5. Good electrical insulating performance, resistance to voltage, but contact with copper aging faster.
6. Molding products more easily, easy to stretch orientation.
More used in extrusion stretch film or silk and other products;
Product shrinkage is bigger.
All landowners polypropylene products dyeing, printing, adhesive performance is poor.