The chemical modification of the foam surface on the basis of environmentally friendly and safe substances ensures a significant increase in surface tension, which results in excellent long-term stability. Therefore, the AST treatment offers decisive advantages over conventional corona procedures.
A chemical cross-linked foam forms a resistant surface. Cross-linked closed cell polyethylene foam means that during cross-linking, the molecules connect by chemical bonds, forming a structure branched from the straight carbon chain, thus creating a more durable structure. The fineness of the cellular structure gives the material even greater stability.
In this article, we point out the differences between the low and high-density foam. These products are both made of LDPE (Low Density PolyEthylene) but they differ in their density [kg/m3] and thus, the use of these materials is not the same.
Its chemical formula is (C2H4)n, i.e. this is a carbon- and hydrogen-based material. Polyethylene foam is a closed cell solid material and is foamed with gas. Each gas phase is separated by a layer, which yield the cells. Closed cell cross-linked polyethylene foam is the sum of these cells.