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Lijia Small Class: How to Choose Thermal Insulation Materials [Cold and Hot Impact Test Chamber]

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Release date: 2019-06-13

Hot and cold shock test chamberAs a high-end equipment in the field of environmental testing equipment, its various aspects are moving towards high-quality, high-precision, high-level stage. The insulation layer material is divided into two kinds: one is polyurethane rigid foam, and the other is superfine glass fiber cotton. The following two commonly used insulation materials are introduced as follows:

ARigid polyurethane foam

Rigid polyurethane foam, referred to as polyurethane rigid foam, its dosage in polyurethane products is second only to polyurethane flexible foam. Polyurethane hard foam is mostly closed-cell structure, which has good thermal insulation effect, light weight, high specific strength, convenient construction and other excellent characteristics. At the same time, it also has the characteristics of sound insulation, shockproof, electrical insulation, heat resistance, cold resistance, solvent resistance and so on. It is widely used in the insulation layer of refrigerators and freezers, cold storage, refrigerated trucks and other insulation materials for buildings, storage tanks and pipelines, A small amount of non-like wood-like packaging materials. Generally speaking, the lower density rigid polyurethane foam is mainly used as a thermal insulation material, and the higher density rigid polyurethane foam can be used as a structural material. However, rigid polyurethane foam can withstand temperatures in the general range-90 ℃ ~ 150 ℃, the temperature is higher150℃It will weaken the performance of rigid polyurethane foam, such as hardening and heat preservation, and can not be used for some higher temperature equipment.

BSuperfine glass fiber

Ultra-fine glass fiber belongs to a type of glass fiber and is a kind of man-made inorganic fiber. The use of imported equipment, the United States process, the selection of broken glass as the main raw material, with some soda ash, borax and other accessories, the molten state of glass by centrifugal blowing into diameter.2.5-5μmCotton-like glass microfibers, commonly known as glass wool, are intertwined with fibers and have a large number of tiny pores and holes connected inside and outside. Therefore, they are regarded as porous materials and have the advantages of light weight, low thermal conductivity, good thermal insulation and sound absorption performance, non-combustible, corrosion-resistant, non-toxic, not afraid of insects, not pricking the skin, high hydrophobicity rate, and good chemical stability, it is currently recognized as an ideal material for thermal insulation, noise reduction and heat insulation with superior performance.

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