HEAT SEALING AND PACKAGING

WRAPPING Heat sealing of wrapper laminates made of foam 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 heated foam from bleeding through the substrate. The support for the foam can be non-po...

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1. Verfasser:	RASZEWSKI, LEWIS R
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS PACKING PERFORMING OPERATIONS STORING TRANSPORTING UNPACKING
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creator	RASZEWSKI, LEWIS R
description	WRAPPING Heat sealing of wrapper laminates made of foam 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 heated foam from bleeding through the substrate. The support for the foam can be non-porous film such as polyethylene terephthate. The foam face of supported foam wrappers has a cohesive-nonadhesive layer containing 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 polyvinylpyrroliodone 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.
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The support for the foam can be non-porous film such as polyethylene terephthate. The foam face of supported foam wrappers has a cohesive-nonadhesive layer containing 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 polyvinylpyrroliodone is preferably also added to improve the compatability of the volatile corrosion inhibiting composition with the rubber latex that provides the cohesive-nonadhesive characteristics. 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language	eng ; fre
recordid	cdi_epo_espacenet_CA1306587C
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subjects	CONVEYING HANDLING THIN OR FILAMENTARY MATERIAL MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS PACKING PERFORMING OPERATIONS STORING TRANSPORTING UNPACKING
title	HEAT SEALING AND PACKAGING
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