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Foam insulation that has been produced by the methods of making and polyolefin foams blown physically
Foam insulation that has been produced by the methods of making and polyolefin foams blown physically
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机译:泡沫绝缘材料,是通过物理吹制聚烯烃泡沫的方法生产的
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摘要
The invention relates to a process for producing a polyolefin foam having a higher temperature resistance and comprising a polypropylene and/or polyethylene, which process comprises first mixing and melting one or more polyolefins having a melting range, measured by means of differential scanning calorimetry at a heating rate of 10° C./min, within the range of 95 to 170° C. and optionally other polyolefins and/or additives so as to form a homogeneous mixture having a melt temperature within the range of 120 to 160° C., melting said homogeneous mixture in an extruder, mixing said molten mixture with a physical foaming agent and subsequently cooling said mixture so that the molten mixture transfers from the liquid phase into a semi-crystalline phase, and expanding the cooled mixture into a foam. The invention further relates to an insulation foam produced with said process.
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