Polyurethane rigid foam used for thermal insulation technique of wall

Abstract

The invention relates to a polyurethane rigid foam used for a thermal insulation process of a wall, wherein the process flow comprises cleaning a foundation wall, coating an anti-mist polyurethane primer, spraying the thermal insulation polyurethane rigid foam, coating interface treating agent, plastering anti-crack mortar, laying fiberglass mesh, plastering the anti-crack mortar for the second time, pressing the second fiberglass mesh and conducting exterior decoration. Compared with prior art, the polyurethane rigid foam adopted in the invention has a stronger adhesion force. As the overall construction is conducted, there is no assemble joint or construction joint in a thermal insulation layer; the phenomenon of 'hot-cold bridge' is avoided; the service life of the thermal insulation layer of the wall is prolonged; and in addition, as the adopted polyurethane rigid foam is low in heat conductivity factor, the thermal insulation performance of the wall adopting the process is better.

Description

technical field [0001] The invention relates to wall heat preservation technology, in particular to polyurethane rigid foam used in wall heat preservation technology. Background technique [0002] In my country, 40% of building energy consumption is used for heating (heating) and hot water in housing space, so housing space heating has the greatest and most sustainable energy-saving potential. In general buildings, take residential buildings as an example: the heat transfer through the envelope structure is about 72% of the building's energy consumption, and the air infiltration is about 28% of the building's energy consumption. In the heat transfer of the envelope structure, the outer wall The heat transfer rate of the building is 24%, the roof and the ground are generally about 10%, the stairwell wall is about 10%, and the heat transfer rate of the window is 22%. According to my country's second-stage energy-saving standards for heated residential buildings, the heat tran...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of assembly or construction joints in the thermal insulation layer of the existing polystyrene material wall insulation process, the phenomenon of "thermal and cold bridge" that is prone to occur, and the defects of quality and safety hidden dangers such as cracking, water seepage, freezing and thawing, and falling off. Provide a polyurethane rigid foam with strong adhesion to the wall, integral construction, no assembly or construction joints in the insulation layer, no "thermal-cold bridge" phenomenon, low thermal conductivity and better thermal insulation performance body for wall insulation

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