Porous composite pearlite heat insulating material

Abstract

The invention belongs to the technical field of heat insulating material preparation and relates to a porous composite pearlite heat insulating material. The heat insulating material is made of the following raw materials in percent by weight: 15-60 percent of pearlite particles, 30-70 percent of bentonite, 2-10 percent of polycrystalline aluminum oxide fiber, 0-1 percent of anti-cracking fiber, 1-10 percent of polyacrylamide, 5-20 percent of toluene diisocynate (TDI-, 100-65) and 5-10 percent of water repellent, wherein the diameter of the pearlite particles is no more than 6mm; the weight percentage of aluminum oxide in the polycrystalline aluminum oxide fiber is 30-90 percent; the anti-cracking fiber comprises polypropylene and the length of the anti-cracking fiber is 1-10cm; and the molecular weight of the polyacrylamide is 3-12 million. The porous composite pearlite heat insulating material has the advantages that the production process is simple, the scientificity is good, the production cost is low, the raw materials are easy to obtain, the heat insulating performance of a product is good, the weight is light and the popularization and application are facilitated.

Description

Technical field: [0001] The invention belongs to the technical field of thermal insulation material preparation, and relates to a thermal insulation plate-like material with a novel composite structure used in construction occasions, in particular to a porous composite perlite thermal insulation material. Background technique: [0002] Since the promulgation and implementation of Document No. 65 of the Ministry of Public Security in 2011, Class A fireproof exterior wall insulation has been included in the mandatory standards for exterior wall insulation of civil buildings. Due to the withdrawal of Class B fireproof materials, the market has become more interested in exterior wall insulation materials with Class A fireproof standards. There is a great demand; expanded perlite particles are a common non-combustible thermal insulation material. The thermal insulation material based on it has the characteristics of low price, light weight, long-term use without deformation, no sh...

AI Technical Summary

Problems solved by technology

The disadvantage of the prior art is that firstly wet compression molding is required, which requires more production equipment and more investment; the wet compression molding process leads to a compact structure of the finished product, although The density is high, and the strength of the finished product is high, but the more important thermal insulation performance of the thermal insulation material is undoubtedly reduced compared with the porous structure; the perlite thermal insulation profiles produced by the prior art mainly rely on the microporous structure of the perlite itself to generate thermal insulation effect

In this way, to achieve the same thermal insulation effect, thicker size, dense structure and thicker size requirements are required, which undoubtedly requires more raw materials, plus more investment in production equipment, and the cost increases; and this technology is also affected by the shape of the mold. Due to the limitations of molding equipment and compression molding equipment, it can only produce products with simple shapes such as flat plates or blocks, and there is a problem that products with complex shapes cannot be directly reached; and the materials after demoulding in a wet state are easily damaged, which reduces the production efficiency, and increased product limitations

In addition, the relatively high density and poor thermal insulation effect of the existing technology bring many shortcomings in the building design, such as shared area, building load, and construction convenience and safety; The method of directly plastering the wall is easily affected by weather factors such as temperature and rainfall before drying, and the construction period and quality after completion; because the slurry carries a lot of water, there are problems such as inconvenient transportation, high cost, and easy freezing in winter, while viscous slurry Insulation profiles coated with other materials either have lower insulation effect under the same thickness, or the cost is too high, which lacks competitiveness, which is purely superfluous