the extruded sheet is generally poor

Posted by Wangkiky Wangkiky over 6 months ago

compressive strength, water absorption and thermal conductivity, the choice of different grades of products. Fourth, the insulation effect Insulation material selection general attention to key indicators. 1, Thermal Conductivity: Due to the choice of different materials, different thermal conductivity results. Due to the high water absorption, the thermal conductivity of dry bulk density and wet bulk density varies greatly. 0.028- 0.042 (W / m.k) is generally the thermal conductivity value of the material is relatively large, energy-saving effect is poor, can not meet the energy-saving 65% standard. 2, Apparent density and compressive strength: The general XPS bulk density in �� 30-38kg / m3, the industry standard value, both to achieve adiabatic performance and achieve the desired compressive strength. The difference is not the product is heavier or lighter the better, but to ensure that the product of high foaming rate, compressive strength and good, is one of the ideal product choice. 3, the rate of dimensional change: dimensional change rate from the material foam material and foam ratio and density of the relationship between the three. Good product, low dimensional change, shrinkage, stability. 4, water vapor permeability coefficient: material hole, semi-open [url=http://i-ubytovani.eu/pvc-fence/1509.html]84 lumber vinyl fencing[/url] [url=http://pvcboardprice.com/pvc-board/5428.html]pvc panel manufacturer in china[/url] [url=http://iasms.in/composite-bench/162.html]cost of garage tek floor coating[/url]