Conflagration
发表于 2025-3-23 11:29:06
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delusion
发表于 2025-3-23 14:07:18
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无目标
发表于 2025-3-23 20:13:11
Integral Foam Based on PolyurethanesIntegral PUR foams are manufactured using the same raw materials as those used for non-integral PUR foams, viz., hydroxyl-bearing oligomers, usually oligoethers or oligoesters, and di- or polyisocyanates, with tertiary amines, organometallic compounds and metal salts as catalysts, together with surfactants and foaming agents.
ALT
发表于 2025-3-24 00:34:48
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平项山
发表于 2025-3-24 04:25:31
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initiate
发表于 2025-3-24 09:45:56
Secondary Processingnd fastening) are similar to those used on unfoamed and non-integral foamed plastics. However, secondary finishing for IF’s is in some ways specific because of the large size, complex shape and imperfect surface of most of the parts ..
minion
发表于 2025-3-24 11:14:12
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确定的事
发表于 2025-3-24 16:47:19
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Frenetic
发表于 2025-3-24 20:33:28
Injection Molding: Gas Counter Pressure Process the injection of the melt. If the counter pressure is too high, however, the surface quality is diminished. The mold cavity is filled completely by the melt and the density reduction occurs by volume contraction of the raw material ..
nerve-sparing
发表于 2025-3-25 00:25:47
Comparison and Selection of Integral Foam Processesst always interested in the technical aspects of an IF process, and, of course, in cost comparisons with similar parts made from unfoamed or foamed (but non-integral) plastics. Non-plastic producers and consumers are mainly interested in cost comparisons with wood, metal or concrete solutions to their problems ..