Verfahren zur Behandlung einer Polyolefinoberfläche von Verpackungsmaterialien und so behandeltes Verpackungsmaterial

• Main Authors: EKSTROM,KARL-ERIK, LENNARTSON LINDH,THORSTEN
• Format: Patent
• Language: German
• Published: 31.03.1967
• Edition: 1
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; CONVEYING; GENERAL PROCESSES OF COMPOUNDING; HANDLING THIN OR FILAMENTARY MATERIAL; MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGINGARTICLES OR MATERIALS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKING; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; UNPACKING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Packaging materials having a polyolefine film on the surface which is to form the outside of the package and a surface of heat-sealable plastics material on the side which is to form the interior of the package are coated on the polyolefine surface, at least on that portion which during the packaging operation will contact a heated pressure tool, with a layer of paraffin hydrocarbon which is solid at normal room temperatures but has a melting point lower than the polyolefine film. Preferably, the paraffin is applied molten at a temperature near the melting point or range of the polyolefine, so that it "blends" with the polyolefine forming a "boundary region" in which both materials are present. The packaging materials may be wholly composed of polyolefine or may comprise paper, metal or other plastics.