发明名称 |
PROCESS FOR PRODUCING A POLYETHYLENE COATING ON A SUBSTRATE |
摘要 |
<p>This invention concerns a process for coating a substrate, and an extrusion coating structure. According to the present process, the coating is provided by producing a bimodal polyethylene composition by subjecting ethylene, optionally with hydrogen and/or comonomers to polymerization or copolymerization reactions in a multistage polymerization sequence of successive polymerization stages. The polymerization reactions are carried out in the presence of a single site catalyst capable of forming a composition which comprises a low molecular weight component with an MFR2 of 20 g/10 min or more and a density higher than the density of the composition, and a high molecular weight component, said composition having a melt flow rate MFR2 of 5 g/ 10 min or more and a density of 915 - 960 kg/m<3>. The composition is extruded on the substrate as such or by adding 10 wt-% or less, calculated from the total weight of the coating, of high pressure PE-LD by blending into the extrusion composition or by coextrusion.</p> |
申请公布号 |
WO0162847(A1) |
申请公布日期 |
2001.08.30 |
申请号 |
WO2001FI00161 |
申请日期 |
2001.02.19 |
申请人 |
BOREALIS TECHNOLOGY OY;VAEHAELAE, MARTTI;SALMINEN, HANNU;LEHTINEN, ARJA |
发明人 |
VAEHAELAE, MARTTI;SALMINEN, HANNU;LEHTINEN, ARJA |
分类号 |
B29C47/02;C08F4/659;C08F4/6592;C08F10/00;C08F10/02;C08F210/16;C08F297/08;C08L23/08;(IPC1-7):C08L23/04 |
主分类号 |
B29C47/02 |
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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