¡¡¡¡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.
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.