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Phenolic foamThermal insulation materialIt is often referred to as phenolic foam.Phenolic foam is based onphenolic resinAnd flame retardants, smoke suppressants, curing agents, foaming agents, and other additives, etcRigid foam plastic。
Chinese name
Phenolic foam
Features
New fire-resistant, fireproof and low smoke insulation materials
phenolic foam It is a new type of flame retardant, fireproof and low smokeThermal insulation materialIt is a closed cell made of phenolic resin added with flame retardant, smoke suppressant, foaming agent, curing agent and other additivesRigid foam plastic。
Its most prominent characteristics are flame retardancy, low smoke and resistance to high temperature distortion.It can be cast and foamed on site, molded, or machined, and can be made into plates, pipe shells, and various special-shaped products.It overcomes the shortcomings of the original foamed plastic insulation material, such as flammability, smoke and deformation in case of heat, and retains the characteristics of the original foamed plastic insulation material, such as light weight and convenient construction.
Phenolic foam plastic is rich in raw materials, low in price, simple in production and processing, and widely used.It is suitable for large cold storage, storage tanks, ships, various insulation pipes and construction industry.If it is used in factories, mines and mechanical equipment with strict fire protection requirements, it can highlight its characteristics of flame resistance, low smoke and resistance to high temperature distortion.For example, thermal insulation of ships, warships, trains and armored vehicles, as well as papermaking, chemical, pharmaceutical and other aspects.
performance
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1. It has a uniform closed cell structure,thermal conductivityLow, good thermal insulation, equivalent to polyurethane, superior topolystyreneFoam;
2. Under the direct action of the flame, there is carbon deposition, no drop, no curl and no melting phenomenon. After the flame burns, a layer of "graphite foam" is formed on the surface to effectively protect theFoam structureThe flame penetration resistance time can reach 1 hour;
3. It is applicable to a wide temperature range. It can be used at - 200 ℃~200 ℃ in the short term and 140 ℃~160 ℃ in the long term, superior to polystyrene foam (80 ℃) andPolyurethane foam（110℃）；
4、phenolic aldehydeThe molecule only contains carbon, hydrogen and oxygen atoms. When it is decomposed at high temperature, it will not produce other toxic gases except a small amount of CO gas. The maximum smoke density is 5.0%.25mm thickPhenolic foam boardAfter being subjected to flame spraying at 1500 ℃ for 10 minutes, the surface is only slightly carbonized but cannot burn through, neither igniting nor emitting thick smoke and toxic gas;
5. The phenolic foam can resist almost all inorganic acids, organic acids and organic solvents except that it may be corroded by strong alkali.Long term exposure to the sun, no obvious aging phenomenon, so it has good aging resistance;
6. It has a good closed pore structure, low water absorption, strong steam penetration resistance, and no condensation when used for heat insulation (cold insulation);
7. The size is stable and the change rate is small, and the size change rate is less than 4% within the use temperature range;
8. The cost of phenolic foam is low, only equivalent toPolyurethane foamTwo thirds of.
application area
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Since the 1990s, phenolic foam materials have been greatly developed. First, they were valued by the British and American military, and used in aerospace, defense and military industries. Later, they were used in civil aircraft, ships, stations, oil wells and other places with strict fire protection requirements, and gradually pushed to high-rise buildings, hospitals, sports facilities and other fields.
Application form
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1. Produce large foam, and then use computer program to control profilingWire cutting machineCut into various foam insulation plates or pipe shells, which are used in various occasions as insulation, fire prevention and decoration functions;
2. Directly produced into veneer sheets or large plates for use in buildingsDecorative sheetorfirewall, fireproof board, fireproof partition wall, etc;
3. The foam can be poured on site, and the insulation layer of large storage tank, reactor and pipeline can be poured below 15 ℃ outdoor;
4. Spray foam on site, and spray the surface of mines, tunnels and underground buildings with spray guns as thermal insulation layers;
5. It can be used as a material for external and internal insulation of external walls andColor steel sandwich panelThe core of the plate.
Development prospect
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Because both polystyrene foam and polyurethane foam are flammable and not resistant to high temperature, they are restricted by the fire department in some industrial developed countries. For places with strict fire protection requirements, government departments have explicitly stipulated that only phenolic foam and its sandwich panels can be used.Therefore, phenolic foam insulation material is a high-performance material more suitable for use in harsh environmental conditions, and has a good development prospect.
Phenolic foam is mainly divided into two types, one for loose phenolic foam and the other for dense phenolic foam.However, the complexity of foam production requires close cooperation with customers, customized for customers, and the development of resins matching the customer's production process.
Phenolic foam can be used as fire insulation foam and flower arrangement mud (used to keep moisture and facilitate long-distance transportation, etc.) foam for thermal insulation according to different properties.
