发明名称 |
Föfrarande för framställning av beläggning av polyeten på ett substrat |
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 MFR<SUB>2 </SUB>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 MFR<SUB>2 </SUB>of 5 g/10 min or more and a density of 915-960 kg/m<SUP>3</SUP>. 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 |
FI20000397(A0) |
申请公布日期 |
2000.02.21 |
申请号 |
FI20000000397 |
申请日期 |
2000.02.21 |
申请人 |
BOREALIS POLYMERS OY,, |
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):C08F |
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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