亚洲国产日本韩国欧美_无码人妻丝袜视频在线播免费_色婷婷av一区二区在线观看_一级黄色欧美性爱_国产欧美日产一区二区三区不卡顿_久久婷婷五月综合色吧亚洲无_国产不卡毛片网_国产午夜精品影院_尤物视频网站_中文字幕日韩亚洲制服丝袜

The running process of polyurethane foaming machine

　　Experience foaming polyurethane foam formation and maturation in two stages. From black and white material mixing to bubble volume expansion stops, this process is called foam. Foaming process, the system releases a lot of hard foam polyurethane (PU) insulation material is made of isocyanate and polyol reaction a with urethane segment repetitive structure unit of the polymer. Due to the heat preservation performance is good, excellent waterproof performance, widely used in exterior wall insulation, roof insulation and cold storage of grain, and archives, and other special parts of the thermal insulation pipe, door window. Rigid polyurethane abroad is widely used in roof and wall insulation, the main application There are two types of composite plate, field spraying.

High-pressure jet, strong penetration, make the paint into the wall space, increase the mechanical bite coating with wall body, improve coating adhesion, extend the service life of coating coating density, improve adhesion, and can spray high viscosity of coating without excessive water, therefore can well keep coating physical properties, effectively extend the life of the coating.

The waterproof property of polyurethane rigid foam and the continuous joint-free and adhesion-free process guarantee the better wind pressure resistance of the wall without cavity, and block the anti-alkali path of the wall caused by capillary. The existing plate thin paste system and polybenzene particle slurry system must strictly prevent the damage of water humidity caused by the crack of the cover, while the polyurethane rigid foam system can adopt the traditional cement mortar surface layer and other surface materials, so as not to cause the deterioration of thermal insulation performance caused by water humidity of the insulation material and the hidden danger of water humidity of the adhesive.