Phenolic board (Phenolic Foam Board) by the phenolic foam material, phenolic foam is a rigid aluminum organic polymer foam products, foam thermosetting phenolic resin. Phenolic insulation board is widely used in developed countries .
Phenolic foam are lightweight, fireproof and met the fire is not burning, smoke-free , non-toxic , non-drip , temperature Wai Kwong (-196 ~ +200 ℃), low temperature environment does not shrink , not brittle characteristics. As the phenolic foam closed cell rate, the low thermal conductivity ( or low 0.030w/mk), good insulation properties , and have some water resistance and water vapor permeability, is a better thermal insulation material , it is HVAC refrigeration Engineering ideal insulation. Since the phenol having a benzene ring structure, dimensional stability , rate of change < 1% . And the chemical composition and stability, corrosion anti-aging, particularly the ability of organic solvents, acid, alkali corrosion. In the production process without Freon in the foam blowing agents to make compliance with international environmental standards, and its molecular structure containing hydrogen, oxygen, carbon, when the pyrolysis gas spilled toxic, tasteless , the human body , are harmless to the environment , compliance with national environmental protection requirements .
There are two types of wet and dry phenolic foam production methods. The former is based on methyl phenolic resin , which can be made of a liquid resin system , European manufacturing phenolic foam using this method . The latter is based on a thermoplastic resin , which can be made of solid resin system , which is another method for the development of the former Soviet Union , and use less current . Wet phenolic foam has unique anti- burn raw energy and other properties :
Anti- combustion performance
Phenolic foam anti- burning properties include two aspects , one is the ability to prevent the spread of flame , heat insulation material that is locally produced flame , the flame will not spread to extinguish ; Second, the insulation properties of the material itself , even in the material side of the fire burning, temperature on the other side will not rise too high and cause a fire expand. And polystyrene foam , polyurethane foam , compared with two characteristics: First, no drip phenomenon fire ; Second, in case of fire carbon dense layer formed on the surface , which prevents further burning foam .
The most prominent feature
Phenolic board is a new flame , smoke and fire insulation material , which is made of phenolic resin added flame retardants, smoke suppressants obturator , blowing agents, curing agents and other additives made ​​of rigid foam .
1 , having a uniform closed cell structure , low thermal conductivity , good thermal insulation properties , and the polyurethane is quite better than the polystyrene foam.
2 , under the direct action of the flame with a knot of carbon, no dripping , no curling , no melting phenomenon, the surface layer of the flame " graphite foam " layer effectively protects the foam structure within the layer , anti- fire penetration time up to 1 hour.
3, for the extended temperature range , can be used at -200 ℃ ~ 200 ℃ short-term , long-term use at 140 ℃ ~ 160 ℃, better than polystyrene foam (80 ℃) and polyurethane foam (110 ℃).
4 , phenolic molecules containing only carbon , hydrogen and oxygen atoms , when subjected to pyrolysis , in addition to a small amount of CO gas , the other will not produce toxic gases , maximum smoke density is 5.0% . 25mm thick phenolic foam board to withstand 1500 ℃ flame jet after 10min , only a slight carbonation but not burning surface wear , neither fire nor will emit smoke and toxic gases .
5 , in addition to the phenolic foam may be alkali corrosion, resistant to almost all of the inorganic acids, organic acids , organic solvents erosion . Long-term exposure to sunlight , no significant aging, which has good resistance to aging.
6 , has a good closed-cell structure , low water absorption , anti- vapor infiltration, when used as insulation purposes ( cold ) , condensation will not occur .
7 , dimensionally stable , low rate of change in the temperature range of dimensional change rate of less than 4 %.
8 , low cost phenolic foam , polyurethane foam is only about two-thirds . Application forms phenolic insulation materials.
( 1 ) , the production of a large piece of foam , and then use a computer program to control the contour cutting machine cut a variety of foam insulation panels , thermal insulation function as , fire safety features and decorative functions used in various occasions .
( 2 ) , the direct production of a veneer sheet or large plate , decorative plates used in construction or firewall , fire panels and fire wall and so on.