1. Rigid polyurethane foam
Rigid polyurethane foam, or polyurethane rigid foam for short, is second only to polyurethane flexible foam in polyurethane products. Polyurethane rigid foam is mostly closed-cell structure, with excellent thermal insulation effect, light weight, large specific strength, convenient construction and other excellent characteristics, but also has the characteristics of sound insulation, shockproof, electrical insulation, heat resistance, cold resistance, solvent resistance, etc., widely used Insulation materials for refrigerators, freezers, insulation for cold storage, refrigerated trucks, etc., and insulation materials for buildings, storage tanks, and pipelines are used in small amounts in non-insulated applications, such as imitation wood and packaging materials. Generally speaking, lower density polyurethane rigid foam is mainly used as heat insulation (insulation) material, and higher density polyurethane rigid foam can be used as structural material (imitation wood). However, the rigid polyurethane foams generally have a temperature resistance range of -40 ° C to + 80 ° C. Temperatures above 80 ° C will weaken the rigid polyurethane foams and reduce their thermal insulation properties. They cannot be used for some higher temperature equipment.
Second, ultra-fine glass fiber cotton
Superfine glass fiber wool is a kind of glass wool. It is a filamentary material made of thermosetting resin by fibrillating and spraying thermosetting resin by centrifugal blowing process of molten glass, and then processed by thermal curing and deep processing. A series of products with multiple uses. It has many advantages such as flame retardant, non-toxic, corrosion-resistant, low bulk density, low thermal conductivity, strong chemical stability, low moisture absorption rate, good water repellency, etc. It is the most superior thermal insulation, heat insulation and sound absorption material in the industry at present. Has a very wide range of uses. Widely used in aircraft, trains, ships, petrochemicals, machinery, metallurgy, hydropower, medical equipment, national defense and military industries as equipment containers, large and small tank towers, hot and cold pipes, ovens, ovens, refrigerators, drying ovens , Aging test box, refrigerator, oxygen generator, hot air fan, constant temperature room, air conditioning system, factory roof, exterior wall, handle plate and other projects, sound absorption and noise reduction, insulation and heat insulation, and used in electronic instruments, semiconductor components , Air filter, steam purification and other aspects of thermal insulation, sound absorption and noise reduction, the effect is very significant. Glass fiber cotton now generally withstands temperatures of 600 ℃ ~ 800 ℃, so its performance will not be affected by high temperature, high-temperature aging series of equipment in the ring test industry mostly use such insulation materials.
The advantages and disadvantages of thermal insulation materials affect the performance of the equipment to a certain extent. The thermal insulation layer cannot achieve the expected effect, and it is inevitable that the equipment cannot achieve the set temperature or it is difficult to maintain the temperature constant. The aging test box produced by Beijing Yashilin adopts excellent ultra-fine glass fiber cotton, and the thickness of the insulation layer is 100mm. Regardless of the appearance of the product or the insulation of the equipment, the harmony and unity of beauty and performance have been achieved.
carbon steel & aluminium alloy Bakeware
carbon steel bakeware
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