There are two ways of producing cross-linked polyethylene foam, chemically cross-linking and irradiated cross-linking. XPE foam sheets are produced by the first method.
DCP(crosslinking agent) is mixed up with polymer so that the sheets are cross-linked and foamed at the same time. This process needs to be cautious in order to balance the decomposition of DCP and AC(foaming agent) because the heat of mixture increases.
Other additives include a stabilizing agent, activating agent, color master, and flame retardant.
Note: IXPE foam is cross-linked by irradiation, while XPE foam is by the foaming agent.
As you can see, the process of the "finished products" is the place to pack, so we are easy to control the length of rolls, if sheets needed, the rolls will be cut into the sheets as the size.
Performances of XPE foam sheets as well as other foam material depends on the following elements:
-type of polymer
-amount of open cells and closed cells
-additives to improve performances
-the structure and integrity of foam cells
XPE foam sheets consist of non-toxic cross-linking and foaming agent. In the meantime, its closed cell structure can resist water, moisture, and sound.
XPE foam sheets have an extremely wide range of applications: automotive, building and construction, aerospace, marine industries and etc.