我和妽妽发生了性关_久久最新免费网址_九色在线全免费a级毛片_亚洲中文字幕无码重口变态_三个人一起弄进去就软了_精品少妇无码少妇av_亚洲另类视频图片小说_少妇被五个黑人玩的在线视频_毛片免费观看的视频在线_亚洲iv成无码人

Buildings using extruded board systems for cold storage construction have good thermal stability, are warm in winter and cool in summer, and are becoming more and more popular. It can also improve and improve the waterproofness and airtightness of the wall, avoiding the occurrence of condensation inside the wall.

It is an indispensable material in cold storage construction. It not only plays a role in thermal insulation, but also can absorb and buffer a small amount of water vapor condensation and reduce the formation of water droplets due to the microporous structure on the surface of the extruded board. It can be used for energy-saving transformation of high-rise buildings, multi-story buildings and old houses. Among them, the concrete or masonry exterior wall insulation engineering of civil buildings in cold areas and hot summer and cold winter areas has better effect.

Raw materials are the key factor of extruded board in cold storage construction. Extruded board is produced from polystyrene resin. But now many extruded boards on the market are made of recycled materials. Insulation of rock wool pipe insulation board and rubber plastic insulation board: Since fiber adhesive board adopts advanced cement and plant fiber structure, its thermal conductivity is almost the same as gypsum board, so its thermal insulation performance has obvious advantages.

In addition, the heat insulation effect of extruded board on cold storage has also made extruded board widely recognized. The compressive strength of extruded board of different models and thicknesses is as high as 150-500Kpa, and the impact resistance is also excellent. An important parameter of extruded board is that after absorbing water, the insulation performance of the insulation material decreases. At low temperatures, the absorbed water is easy to freeze, destroying the structure of the insulation material, thereby reducing the compressive strength and insulation performance of the board.