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There is no pin hole, freely air bubble size freely production method of control possible polyurethane form.
There is no pin hole, freely air bubble size freely production method of control possible polyurethane form.
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机译:没有针孔,可自由气泡大小,可控制聚氨酯形态的生产方法。
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摘要
PROBLEM TO BE SOLVED: To provide a polyurethane foam which is pinhole-free and has a desired cell size.;SOLUTION: The method for manufacturing a polyurethane foam comprises (a) maintaining an internal pressure of a mixing chamber at 0.1-0.7 Mpa, (b) injecting an inert gas of 3-40% by volume relative to the whole raw material in the raw material transporting means under a pressure higher, by 0.2-12 Mpa, than the mixing chamber internal pressure, and (c) agitating in a mixing chamber provided with a mixer having a nozzle.;COPYRIGHT: (C)2008,JPO&INPIT
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