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1. WO1999026783 - MULTILAYER HEAT-SHRINKABLE THERMOPLASTIC FILM

Publication Number WO/1999/026783
Publication Date 03.06.1999
International Application No. PCT/US1998/024293
International Filing Date 13.11.1998
Chapter 2 Demand Filed 25.06.1999
IPC
B32B 27/34 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products essentially comprising synthetic resin
34comprising polyamides
B65D 65/40 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
65Wrappers or flexible covers; Packaging materials of special type or form
38Packaging materials of special type or form
40Applications of laminates for particular packaging purposes
CPC
B32B 27/34
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products comprising ; a layer of; synthetic resin
34comprising polyamides
Applicants
  • CRYOVAC, INC. [US]/[US] (AllExceptUS)
  • PALEARI, Mario [IT]/[IT] (UsOnly)
  • BUZZI, Giampaolo [IT]/[IT] (UsOnly)
Inventors
  • PALEARI, Mario
  • BUZZI, Giampaolo
Agents
  • QUATT, Mark, B.
Priority Data
97120724.626.11.1997EP
98108493.211.05.1998EP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) MULTILAYER HEAT-SHRINKABLE THERMOPLASTIC FILM
(FR) FILM THERMOPLASTIQUE MULTICOUCHE THERMORETRACTABLE
Abstract
(EN) A heat-shrinkable film, which is useful in the manufacture of bags with a good balance of mechanical, optical and shrink properties and improved sealability, comprises an outer heat-sealing layer of a heat-sealable polyolefin, an outer abuse layer comprising a polyamide with a melting temperature $m(G) 180 °C, and an intermediate layer comprising a polyamide with a melting temperature lower than 165 °C. The bags thus obtained can suitably be heat-sealed also when overlapped.
(FR) La présente invention concerne un film thermorétractable utilisé dans la production de sacs, présentant un bon équilibre de propriétés mécaniques, optiques et rétractables ainsi qu'une étanchéité améliorée. Ce film comprend une couche externe thermoscellable constituée d'une polyoléfine thermoscellable, une couche externe indicatrice d'effraction comprenant un polyamide dont la température de fusion est $m(G) 180 °C, et une couche intermédiaire comprenant un polyamide dont la température de fusion est < 165 °C. Les sacs ainsi obtenus peuvent être thermosoudés, de manière appropriée, même lorsqu'ils se chevauchent.
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