High-density polyethylene closed-cell high-temperature-resistant foam is a new type of waterproof material with an independent bubble structure. The appearance structure is composed of tiny foam particles. Foaming production process: Two different polyethylene raw materials are put 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 the blowing agent, and the particle size is also different. It is used to form the outer surface of plastic parts.
The powdery polyethylene first adheres to the mold while the small spherical polyethylene continues to circulate and continue to be heated, and then forms the skin shell layer of the plastic part and then undergoes a foaming reaction. The performance of the high-density polyethylene closed-cell foam board is very excellent. First of all, its density is very small, the recovery rate is high, and it has an independent bubble structure. Among the physical properties of polyethylene closed-cell foam board, its low water absorption rate means good waterproof performance and strong corrosion resistance. Therefore, polyethylene closed-cell foam board also has a characteristic that it is not easy to age and is durable.
The high-density polyethylene closed-cell foam board also has a great feature that it does not expand and contract like other materials. Polyethylene closed-cell foam board does not flow at high temperature, does not shrink at low temperature, and does not swell, so the pollution is almost zero. Polyethylene closed cell high temperature resistant foam is also characterized by light weight, which is much more convenient than other materials in transportation and installation.