Rigid polyurethane foam plastic
Rigid polyurethane foam plastic is a new kind of heat insulating
material in low temperature. It is mainly made of polyether or
polyester plus polyisocyanate ester added with flame retardant,
stabilizing agent and foaming agent and it changes into foaming
body through chemical reaction after mixed and stirred. It has high
rate of closed cells and low water absorption.
Because of the foaming agent air with low thermal conductivity in
its cells, the rigid polyurethane foam plastic could
self-extinguish. As a result, it is usually used in cold insulation
and heat preservation in low temperature condition. It has
following features: low thermal conductivity, high strength, light
weight, quakeproof, insulation, strong floatability, stable
chemical properties and convenience in construction. Consequently,
it is widely used in industries of petroleum, chemical engineering,
ethylene, refrigerated warehouse, food storage, partition wall and
wallboard in family refrigerator and architecture industry. It can
be made into the form of slab or pipe by factories for
prefabrication or be foamed by sprayed or impregnated on site.
|
