发明名称 |
HIGH STRENGTH EXTRUDED THERMOPLASTIC POLYMER FOAM |
摘要 |
Prepare extruded thermoplastic polymer foam by preparing a foamable polymer mixture containing thermoplastic polymer and blowing agent at a mixing pressure, cooling the foamable polymer mixture and extruding it through a foaming die at a die pressure at least 90 bars lower than the mixing pressure and out through a die opening having cross sectional dimensions of 2.5 millimeter or more and a cross sectional area of at least 700 square millimeters at a flow rate greater than 500 kilograms per hour and allow it to expand into a polymer foam between shaping elements while restraining the extrusion rate with a restraining device so as to form polymer foam having 96 volume percent or less void volume, anisotropic cell size, a thickness of 50 millimeter or greater, compressive and tensile moduli in the thickness dimension greater than 35 mega pascals and an average shear modulus greater than 16 mega pascals. |
申请公布号 |
EP2627697(A1) |
申请公布日期 |
2013.08.21 |
申请号 |
EP20110808037 |
申请日期 |
2011.12.14 |
申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
VO, VAN-CHAU;SAGNARD, ALAIN;GORDON-DUFFY, JOHN |
分类号 |
B29C44/50;B29C44/20;C08J9/00;C08J9/04;C08J9/12;C08J9/14 |
主分类号 |
B29C44/50 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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