News

Why high density polyethylene closed-cell foam board can stop water

Update:10-02-2020
Summary:

High-temperature-resistant foam manufacturers introduce […]

High-temperature-resistant foam manufacturers introduce high-density polyethylene closed-cell foam boards, which are a new type of waterproof material with independent bubble structure. The appearance structure is composed of tiny foam particles. Foaming production process: two different polyethylene raw materials are put into a mold, one is powdery polyethylene, and the other is a small spherical polyethylene mixed with a blowing 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 particle size of powdered polyethylene is 500 ~ 1000 microns, and the size of small spherical (mixed with foaming agent) polyethylene particles is 3 ~ 4 mm). The powdery polyethylene first adheres to the mold while the small spherical polyethylene continues to circulate and heat, 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 small, the recovery rate is high, and it has an independent cell structure. Among the physical properties of polyethylene closed-cell foam board, its low water absorption rate means good waterproof performance and strong anti-corrosion ability. Therefore, polyethylene closed-cell foam board has another feature that it is not easy to age and is durable.

High-density polyethylene closed-cell foam board also has a great feature that it does not thermally expand and contract like other materials. The high-temperature resistant foam manufacturers introduced that polyethylene closed-cell foam boards do not melt or flow at high temperatures, do not shrink or expand at low temperatures, so pollution is almost zero. Another feature of polyethylene closed-cell foam board is its light weight, which is much easier to transport and install than other materials.