发明名称 |
VERPACKUNG. |
摘要 |
Heat sealing of wrapper laminates (31, 32) made of foam (102) supported by a porous substrate sheet is improved by coating on the foam-engaging face of the substrate a barrier layer such as polyvinylalcohol to keep the foam (102) when melted from bleeding through the substrate. The support for the foam can alternatively be non-porous film such as polyethylene terephthalate. In a cold sealing embodiment the foam face of supported foam wrappers has a cohesive-nonadhesive layer which can contain improved volatile corrosion inhibitor and/or antistat compositions that do not shorten its shelf life below about six months. One such composition is a mixture of dicyclohexylamine with 2-amino-2-lower-alkyl-propadiol-1,3. Protective colloid such as polyvinylpyrrolidone is preferably also added to improve the compatability of the volatile corrosion inhibiting composition with the rubber latex that provides the cohesive-nonadhesive characteristics. Heat sealing of wrapper can be effected with the help of hot melting shoes (39 and 41). |
申请公布号 |
AT72186(T) |
申请公布日期 |
1992.02.15 |
申请号 |
AT19860905548T |
申请日期 |
1986.08.20 |
申请人 |
THE CROWELL CORPORATION |
发明人 |
ADELMAN, HERBERT, B.;RASZEWSKI, LEWIS, R.;HSU, TEN-HU |
分类号 |
B29C65/20;B65B9/02;B65B23/00;B65B23/22;B65B51/14 |
主分类号 |
B29C65/20 |
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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