发明名称 |
VERFAHREN ZUR WIEDERGEWINNUNG VON CELLULOSEFASERN AUS EINER VERBUNDFOLIE |
摘要 |
<p>A method for recovering cellulosic fibres from thermoplastic-fibreboard laminates such as fruit juice and milk cartons. The method involves heating the laminate in a pulping liquor to a temperature equal to or greater than the softening point of the thermoplastic material. This is followed by cooling to a temperature below the softening point and defibration by mechanical or explosive means. The method results in a mixture of thermoplastic fragments and cellulosic fibres which can be readily separated by conventional means. Pressure may be applied to the laminate/liquor system to accelerate the process.</p> |
申请公布号 |
DE2750600(A1) |
申请公布日期 |
1978.05.24 |
申请号 |
DE19772750600 |
申请日期 |
1977.11.11 |
申请人 |
COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANIZATION |
发明人 |
MAMERS,HEIKKI;EDWARD ROWNEY,JOHN |
分类号 |
D21B1/32;D21C5/02;(IPC1-7):C08J11/04;D01F13/02 |
主分类号 |
D21B1/32 |
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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