发明名称 |
MULTILAYER PIPE |
摘要 |
Multilayered plastic pipe of at least two layers of different plastic material consists of polyolefin plastic having resistance to rapid crack propagation expressed as the critical temperature of the pipe. The critical temperature of the pipe is lower than weighted average of the critical temperature of the single-layer pipes of the individual plastic material, differing by at least 5 deg C. A crack initiated in the pipe propagates a distance of at most 4 times the diameter of the pipe at a pressure difference of 0.5 MPa between inside and outside of the pipe. |
申请公布号 |
HU9902598(A2) |
申请公布日期 |
1999.12.28 |
申请号 |
HU19990002598 |
申请日期 |
1997.02.24 |
申请人 |
Borealis A/S |
发明人 |
EK, CARL-GUSTAF;LINDSTROEM, HELGE;SANDBERG, HANS |
分类号 |
F16L9/133;F16L11/04;F16L57/02 |
主分类号 |
F16L9/133 |
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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