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.
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申请公布号 |
US2013266766(A1) |
申请公布日期 |
2013.10.10 |
申请号 |
US201113884997 |
申请日期 |
2011.12.14 |
申请人 |
VO VAN-CHAU;SAGNARD ALAIN;GORDON-DUFFY JOHN;DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
VO VAN-CHAU;SAGNARD ALAIN;GORDON-DUFFY JOHN |
分类号 |
C08J9/00;B29C44/20;C08J9/04 |
主分类号 |
C08J9/00 |
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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