| 摘要 |
Apparatus for the continuous manufacture of endless foams from prefoamed particulate plastics capable of further expansion. The plastics are passed through a heating zone and a cooling zone by means of belts defining a channel and composed of transverse strips of alternately gas-permeable and gas-impermeable materials of equal thickness. This form of the belts produces better grades of foam at higher output rates on account of the more intense and more uniform steaming achieved. The foams produced are suitable, for example, for use as insulating materials in buildings and for packaging purposes.
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