发明名称 |
UNA PELICULA DE EMPAQUE TERMOPLASTICO,TERMICAMENTE ENCOGIBLE Y PROCEDIMIENTO DE OBTENCION |
摘要 |
<p>The invention provides a multi-layer, heat-shrinkable, thermoplastic packaging film which can be heat-sealed to itself to provide strong seals at pasteurizing temperatures. The preferred film has four layers including, in order, a sealing surface layer comprising a blend of propylene-ethylene copolymer and (butene-1)-ethylene copolymer, a layer comprising ethylene-vinyl acetate copolymer which may be cross-linked to further increase high temperature strength of the film as desired; a relatively gas-impermeable layer comprising a copolymer of vinylidene chloride; and a surface layer of the same blend as the sealing layer. Receptacles such as end seal and side seal bags can be made from the film at a faster rate than with prior art films and these receptacles have the high temperature seal qualities of propylene polymers and the hot water shrink capabilities of ethylene polymers. </p> |
申请公布号 |
MX162370(A) |
申请公布日期 |
1991.04.30 |
申请号 |
MX19820193335 |
申请日期 |
1982.06.28 |
申请人 |
W.R. GRACE & CO.-CONN. |
发明人 |
NORMAN D. BORNSTEIN;JOHNNIE J. WLATERS |
分类号 |
B32B27/28;B29C47/04;B29C55/02;B29C61/06;B29K9/00;B29K105/02;B29L9/00;B32B27/08;B32B27/16;B32B27/30;B32B27/32;B65D81/24;C08J7/00;C08L23/00;C08L23/04;C08L23/10;C08L23/18;(IPC1-7):B65D85/72;B65D65/40 |
主分类号 |
B32B27/28 |
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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