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1. (WO1991017944) POLYOLEFIN LAMINATE CLING FILMS
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/017944 International Application No.: PCT/US1990/002311
Publication Date: 28.11.1991 International Filing Date: 18.05.1990
Chapter 2 Demand Filed: 23.10.1990
IPC:
B32B 27/32 (2006.01) ,C08L 23/08 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
32
LAYERED PRODUCTS
B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27
Layered products essentially comprising synthetic resin
32
comprising polyolefins
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
L
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
23
Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
02
not modified by chemical after-treatment
04
Homopolymers or copolymers of ethene
08
Copolymers of ethene
Applicants:
THE DOW CHEMICAL COMPANY [US/US]; 2030 Dow Center, Abbott Road Midland, MI 48640, US
Inventors:
HUFF, Georgia, M.; US
KOCH, Kaelyn, C.; US
MURPHY, Mark, W.; US
THOMAS, Christopher, J.; US
Agent:
MACLEOD, Roderick, B.; The Dow Chemical Company P.O. Box 1967 Midland, MI 48641-1967, US
Priority Data:
Title (EN) POLYOLEFIN LAMINATE CLING FILMS
(FR) FILMS ADHERENTS STRATIFIES EN POLYOLEFINE
Abstract:
(EN) A wrap-packaging film laminate (1) having differential cling is provided having at least two layers, one which is an outer reverse layer (2) comprising a linear very low density ethylene copolymer (LVLDPE) having a critical density of less than about 0.915 g/cc which reverse layer contains a tackifier in an amount typically less than 6 percent by weight, which is sufficient to impart the desired level of cling, one of which comprises an obverse layer (3) of an olefin polymer or copolymer, such as a linear low density ethylene copolymer (LLDPE) which has a critical density of at least 0.916 g/cc which has little or no cling, and wherein the difference in density between the reverse layer and the obverse layer is at least 0.004 g/cc, the said differential cling properties being manifested in the higher level of cling of the LVLDPE reverse layer (2) as compared to that of the obverse layer (3).
(FR) Stratifé (1) de films d'emballage-conditionnement présentant une adhérence différentielle, comportant au moins deux couches, dont une constitue une couche de revers extérieur (2) comprenant un copolymère d'éthylène linéaire de trés faible densité (LVLDPE) d'une densité critique inférieure à environ 0,915 g/cc, ladite couche de revers contient un agent collant en une quantité inférieure à 6 % en poids, ce qui est suffisant pour conférer le niveau d'adhérence voulu, et l'autre constitue une couche obverse (3) en polymère ou copolymère oléfinique, tel qu'un copolymère d'éthylène linéaire de faible densité (LLDPE) d'une densité critique d'au moins 0,916 g/cc ayant peu ou pas d'adhérence, la différence de densité entre la couche de revers et la couche obverse étant d'au moins 0,004 g/cc, lesdites propriétés d'adhérence différentielle étant constatées par le niveau supérieur d'adhérence de la couche de revers de LVLDPE (2) comparé à celui de la couche obverse (3).
Designated States: AU, CA, JP, KR
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
EP0541528JPH05506619CA2083057DE000069033235KR1019930700352AU1990056408