APPARATUS FOR PRODUCING A BODY OF POROUS THERMOPLASTIC MATERIAL

摘要

Apparatus for producing a body of porous thermoplastic material having the shape of a continuously advancing strand by means of granules containing a blowing or expanding agent, said apparatus comprising an elongated, rectangularly profiled channel open at both ends and at two opposite sides defined by one horizontal part each of an endless belt movable along a closed circuit between turning rollers. The channel has a heating zone operated with steam as heating agent for the expansion of the granules and sintering thereof together and a cooling zone within which the final product is cooled by means of a cooling agent such as air.