Basic knowledge for the foam extruder

Thermoplastic elastomer TPV can be blister through chemical and mechanical methods. The chemical foaming, can use, such as the heavy hydrochloride, foaming agent. Can achieve the foam density of specific gravity of 0.97 (typically not blister TPV) to 0.70. Lower density affected by patent. Foaming agent will degenerate under 180 ℃ to 180 ℃, because most of TPV is the basis of under the condition of 195 to 215 ℃.

Water is the medium for mechanical method. Here, called "water bubble" technology, is a patent technology. Need to use special equipment to obtain consistent foam structure and density. Density declined from 0.97 to 0.97. In the range of density can be gained by controlling processing technology. The decrease of the density affect the mechanical properties, so it is classified as application design.