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1. WO2000039200 - EASY-TO-PEEL HEAT-SEALING MULTILAYER FILM FROM COEXTRUDED, BIAXIALLY ORIENTED POLYPROPYLENE

Publication Number WO/2000/039200
Publication Date 06.07.2000
International Application No. PCT/EP1999/009775
International Filing Date 10.12.1999
Chapter 2 Demand Filed 15.06.2000
IPC
B32B 27/32 2006.01
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
32comprising polyolefins
B65D 75/58 2006.01
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
75Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
52Details
58Opening or contents-removing devices added or incorporated during package manufacture
CPC
B32B 2307/31
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
2307Properties of the layers or laminate
30having particular thermal properties
31Heat sealable
B32B 2307/518
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
2307Properties of the layers or laminate
50having particular mechanical properties
514Oriented
518bi-axially
B32B 2323/10
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
2323Polyalkenes
10Polypropylene
B32B 2329/06
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
2329Polyvinylalcohols, polyvinylethers, polyvinylaldehydes, polyvinylketones or polyvinylketals
06PVB, i.e. polyinylbutyral
B32B 2553/00
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
2553Packaging equipment or accessories not otherwise provided for
B32B 27/32
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
32comprising polyolefins
Applicants
  • WOLFF WALSRODE AKTIENGESELLSCHAFT [DE/DE]; D-29655 Walsrode, DE (AllExceptUS)
  • BECKMANN, Peter [DE/DE]; DE (UsOnly)
  • BLUM, Thomas [DE/DE]; DE (UsOnly)
  • KÄUFER, Michael [DE/DE]; DE (UsOnly)
  • BROCKMANN, Jürgen [DE/DE]; DE (UsOnly)
Inventors
  • BECKMANN, Peter; DE
  • BLUM, Thomas; DE
  • KÄUFER, Michael; DE
  • BROCKMANN, Jürgen; DE
Agents
  • PETTRICH, Klaus-Günter; Bayer Aktiengesellschaft D-51368 Leverkusen, DE
Priority Data
198 59 689.823.12.1998DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) HEISSSIEGELBARE MEHRSCHICHTFOLIE AUS COEXTRUDIERTEM, BIAXIAL ORIENTIERTEM POLYPROPYLEN MIT PEELBAREM AUFZIEHVERHALTEN
(EN) EASY-TO-PEEL HEAT-SEALING MULTILAYER FILM FROM COEXTRUDED, BIAXIALLY ORIENTED POLYPROPYLENE
(FR) FILM MULTICOUCHE THERMOSOUDABLE A BASE DE POLYPROPYLENE COEXTRUDE A ORIENTATION BIAXIALE, PELABLE
Abstract
(DE)
Coextrudierte BOPP-Folie mit peelbaren Siegeleigenschaften, die in einem farbfreibelassenen Siegelbereich rasterförmig mit einem thermoplastischen Lack bedruckt ist, der mindestens ein Polyvinylbutyral (PVB) oder mindestens ein Ethylen-Vinylacetat-Copolymerisat (EVA-Copo) als merkmalbestimmende Feststoffkomponente enthält, nur schwach gegen coextrudiertes BOPP siegelbar ist und dessen Abstandshaltewirkung durch mit steigender Temperatur fortschreitende Erweichung sukzessiv abnimmt, und daraus hergestellte Verpackungen.
(EN)
The invention relates to a coextruded BOPP film with easy-to-peel sealing properties which is printed in a non-inked sealing zone with a thermoplastic lacquer having a screen-type pattern. Said lacquer contains at least one polyvinyl butyral (PVB) or at least one ethylene-vinyl acetate copolymer (EVA copo) as a feature-specific solid component. Said lacquer is only weakly sealable against coextruded BOPP. The spacing effect of said lacquer gradually decreases as the softening increases with rising temperatures. The invention further relates to packagings produced from said film.
(FR)
L'invention concerne un film à base de polypropylène coextrudé à orientation biaxiale présentant des propriétés de scellage lui conférant une bonne pelabilité. Ce film est imprimé de manière réticulaire dans une zone de scellage de blanc typographique, avec une peinture thermoplastique qui contient comme constituants solides déterminant les caractéristiques, au moins un polyvinylbutyral (PVB) ou au moins un copolymérisat éthylène-acétate vinylique (copo-EVA). Cette peinture présente une capacité de scellage minime par rapport au polypropylène coextrudé à orientation biaxiale et dont l'action d'écartement diminue successivement sous l'effet du ramollissement qui progresse à mesure que la température augmente. L'invention concerne en outre des emballages réalisés à l'aide dudit film.
Also published as
US09868834
Latest bibliographic data on file with the International Bureau