What are the common problems of XPS extruded board on the market?
It has the characteristics of high thermal resistance, low linearity, and low expansion ratio. Its structure has a high closed cell rate, forms a vacuum layer, avoids air flow and heat dissipation, and ensures the durability and stability of its thermal insulation performance. What are the common problems of XPS extruded board on the market?1. Poor fire performance.
2. The wind resistance of the insulation layer of high-rise buildings, especially the negative wind pressure, is unsafe.
3. The glue and plastic expansion nails used for externally bonded benzene boards are polymer materials, which will age and become brittle over time, so the durability is limited. Therefore, both Europe and China have provisions for a service life of not less than 25 years. In the future, the destruction of the outer thermal insulation layer will cause great losses to society and increase the pressure of the waste stream on the environment.
4. The externally bonded benzene board does not meet the demand for glazed tiles on the external wall of the building. In the event of a fire or after 20 to 30 years, the adhesive and plastic expansion nails become hard and brittle when they reach the end of their service life. There is a risk of glazed tiles falling off, so the external decoration of externally bonded benzene boards is required to be paint in national and local standards.
5. It is more difficult to control the construction quality: First, because there are not many benzene board adhesive factories of sufficient scale, the price competition may have an impact on the quality of the adhesive. The quality of other alkali-resistant grid cloths and plastic expansion nails are all Affects the life of the external adhesive benzene board. In addition, when bonding the benzene board, water must be poured on the dry outer wall to wet the wall. If the operator's sense of responsibility is not strong, there may be a phenomenon of leaking water, which affects the bonding effect, so there are many factors that affect quality control.
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