发明名称 |
Multilayered biaxially-oriented styrene based resin sheet and method for production thereof |
摘要 |
A multilayered biaxially-oriented styrene based resin sheet comprises; a styrene based resin layer (A) as at least two outer layers formed by the polymerization of methacrylic acid in a weight proportion of 1-3.5% and styrene, and a styrene based resin layer (B) formed from polystyrene which is sandwiched between the outer layers and for which the loss tangent (tan delta ) maximum peak value temperature for dynamic viscoelasticity measurement is 6.5-25 DEG C. lower than that for the resin of the resin layer (A). The sheet has excellent properties of transparency and external appearance, can be reused by recovering and moreover does not suffer from raindrop occurrence by secondary forming.
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申请公布号 |
US6153308(A) |
申请公布日期 |
2000.11.28 |
申请号 |
US19990251405 |
申请日期 |
1999.02.17 |
申请人 |
DAINIPPON INK AND CHEMICALS, INC. |
发明人 |
OYA, SATOSHI;SAWADA, HIDETSUGU;TOYODA, AKIO;ARAI, KOSUKE;KONISHI, NOBUYUKI;ADACHI, KOJI |
分类号 |
A22C13/00;B29C55/12;B29K25/00;B29L9/00;B32B27/30;C08F12/08;C08L25/04;(IPC1-7):B32B27/08 |
主分类号 |
A22C13/00 |
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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