Heat insulation sandwich layer and preparation method thereof

Abstract

The invention belongs to the field of insulation boards, and discloses a heat insulation sandwich layer and a preparation method thereof. The heat insulation sandwich layer comprises a honeycomb core,rubber layers and aerogel layers are alternately filled in holes of the honeycomb core until the honeycomb core is filled, and the outermost layers of the upper and lower parts are the rubber layers.The preparation method comprises the following steps of (1) mixing a liquid rubber substrate and a reinforcing filler to obtain a rubber glue solution; (2) laying and placing the honeycomb core, alternately spraying a layer of rubber glue solution and a layer of aerogel powder into the honeycomb core until the honeycomb core is filled, and ensuring that the outermost layer is the rubber glue solution; and (3) sequentially carrying out drying and curing treatment on the sprayed honeycomb core to obtain the heat insulation sandwich layer. According to the heat insulation sandwich layer, a laminated structure of the aerogel layers and the rubber layers is adopted, the rubber layer has the characteristics of light weight and heat insulation and is good in flexibility and impact resistance, and the rubber layer is compounded with a aerogel heat insulation material as the outermost protection structure of the honeycomb core, so that the occurrence of powder falling of the aerogel on the surface of the honeycomb core is prevented while the sandwich layer insulation effect is ensured.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation panels, and in particular relates to a thermal insulation sandwich layer and a preparation method thereof. Background technique [0002] At present, most of the exterior walls of buildings are insulated with thermal insulation mortar. Insulation mortar is a kind of ready-mixed dry powder mortar made of various light materials as aggregate, cement as cement, mixed with some modified additives, and mixed by the production enterprise. It is used to construct the insulation layer of the building surface a building material. Insulation mortar has the following disadvantages: high density, the weight of the insulation layer will easily bring difficulties to the construction, and increase the load-bearing burden of the building skeleton; high thermal conductivity, meet the national energy-saving standard, thick thickness; high hygroscopicity, easily lead to excessive weight, Falling off; Aff...

AI Technical Summary

Problems solved by technology

Insulation mortar has the following disadvantages: high density, the weight of the insulation layer will easily bring difficulties to the construction, and increase the load-bearing burden of the building skeleton; high thermal conductivity, meet the national energy-saving standard, thick thickness; high hygroscopicity, easily lead to excessive weight, Falling off; Affected by construction factors, the strength changes greatly

Among them, mineral fiber materials represented by ultra-fine glass wool have defects such as high density, high brittleness, serious water absorption, easy vibration and sagging, poor thermal insulation performance, thick laying, and large material loss. Fibrous and brittle, it is easy to form dust and escape to pollute the environment and cause lung diseases. The use of these materials cannot meet energy-saving standards; ordinary organic foams such as polystyrene foam, polyurethane foam, etc. have poor flame retardancy, high combustion density and release a large amount of Toxic and harmful gas