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core material for vacuum hitzeisolationsmaterial and vacuum hitzeisolationsmaterial
core material for vacuum hitzeisolationsmaterial and vacuum hitzeisolationsmaterial
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机译:真空击穿隔离材料的芯材和真空击穿隔离材料
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Description is made of an open cell polystyrene resin foam having a content of organic volatile matters of less than 100 ppm. The open cell foam is suitable as a core material for a sound insulating material or a vacuum heat insulating material. The open cell foam can be produced by melt-kneading a polystyrene resin having a content of organic volatile matters of 100 ppm or higher together with water in an extruder, sucking out the organic volatile matters as an azeotrope with water through a vent, injecting a blowing agent and kneading the injected mixture, and extruding the mixture into a lower pressure area to cause the resin to foam.
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