Most of the cells contained in the so-called rigid polyethylene foam board are independent bubbles and unconnected foam plastics. The most commonly used hardness can be divided into L- 1 100 and L-600 (which can be tested by a hardness tester). L-600 is harder than L- 1 100. This product is pure black and is generally used in water conservancy projects. L- 1 100 black gray, generally used for caulking of road and bridge expansion joints. Perfect match with sealant. Polyethylene rigid foam board has low density and independent bubble structure. Low surface water absorption and good impermeability. Resistant to acid, alkali, salt, oil and other organic solvents corrosion, good aging resistance. No flow at high temperature and no cracking at low temperature. Compared with foam and polystyrene foam board, polyethylene rigid foam board has certain tensile, compressive and tear strength.
Dexiang Rubber & Plastic will explain the production process of polyethylene rigid foam board for you: put two different polyethylene raw materials into the mold, one is powdered polyethylene, and the other is small spherical polyethylene mixed with foaming agent. The melting point of powdered polyethylene is lower than the decomposition temperature of foaming agent, and the particle size is also different, which is used for the molding of the outer layer of plastic parts. (? The particle size of powdered polyethylene is 500~ 1000 micron, which is spherical (? Mixed with foaming agent? ) The particle size of polyethylene is 3~4 mm? )。 Powdered polyethylene is attached to the mold first, and small spherical polyethylene continues to circulate and be heated continuously, and then the shell of plastic parts is formed, and then foaming reaction occurs. ?