Polypropylene (Different fluidity of fusion)
Polypropylene - the synthetic thermoplastic unpolar polymer belonging to a class of polyolefins. Propylene polymerization product. Solid substance of white color. Is issued in the form of a gomopolimer and the copolymers received by copolymerization of propylene and ethylene in the presence of metalloorganic catalysts with the low and average pressure, in the form of the granules stabilized, painted or unpainted.
Polypropylene - the
plastic material differing in high durability at blow and a
repeated bend, wear resistance, good electroinsulating properties
in the wide range of temperatures, high chemical resistance, low
Paro - and gas permeability. In thin films it is almost
transparent. It is resistant to acids, alkalis, solutions of salts,
mineral and vegetable oils at high temperatures. At the room
temperature it is insoluble in organic solvents. It is dissolved
only at the increased temperatures in strong solvents: the
chlorinated, aromatic hydrocarbons.
Polypropylene is easily processed. Well mixes up with dyes. Easily is exposed to chlorination. Easily crystallizes. Polypropylene is sensitive to light and oxygen, has low frost resistance.
Polypropylene is applied to production gazo-and water pressure head pipes, profiles, sheets, a film, furniture, technical products, goods of cultural and community appointment, in production of polypropylene fiber.
Separate brands of polypropylene are allowed to contact with foodstuff and for production of products of medicobiological appointment.
Property of polypropylene to pass water vapor, does it irreplaceable for the "antimisted" packing of food, and also in construction for a waterproofing.
It is used as fiber at production of carpets and rugs for application in especially adverse environment, for example, in swimming pools, etc.
Polypropylene is used
by production: packings for foodstuff, cosmetics and other goods -
containers (including thin-walled) - disposable ware - caps for
bottles - covers for bottles - boxes - ware, trays, buckets, Tazy
- case details household and office
equipments - the electric tool, devices, fans - products of medical
appointment - toys -
bumpers and details of a body of cars - the details working for a repeated bend, etc.