Avery Dennison Corporation

Donald F Kimes

Karl Josephy

Mitchell J Rackovan

Ramin Heydarpour

Melvin S Freedman

Eng-Pi Chang

Edward I Sun

Johannes Schut

Yao-Feng Wang

Richard C Adams

A multilayer film facestock for labels is described which comprises a base layer having an upper surface and a lower surface, and at least a first skin layer bonded to the upper surface of the base layer by a tie layer wherein the base layer comprises a propylene homopolymer or copolymer, or a blend of a propylene homopolymer and at least one propylene copolymer, and the first skin layer consists essentially of at least one polyethylene having a density of about 0.940 g/cm or less, wherein the multilayer facestock is not oriented. Adhesive containing multilayer labelstocks for use in adhesive labels also are described which comprise the multilayer film facestock described above and an adhesive layer adhesively joined to the lower surface of the base layer. Labels prepared from the facestock and the labelstock also are described.

Multilayer films and labels

A multilayer film facestock for labels is described which comprises a base layer having an upper surface and a lower surface, and at least a first skin layer bonded to the upper surface of the base layer by a tie layer wherein the base layer comprises a propylene homopolymer or copolymer, or a blend of a propylene homopolymer and at least one propylene copolymer, and the first skin layer consists essentially of at least one polyethylene having a density of about 0.940 g/cm or less. In one preferred embodiment, at least the base layer is machine direction oriented. In another embodiment, the base layer comprises a polyethylene having a density above 0.940 g/cm (high density) and the polyethylene is ultimately oriented in the machine direction. Adhesive containing multilayer labelstocks for use in adhesive labels also are described which comprise the multilayer film facestock described above and an adhesive layer adhesively joined to the lower surface of the base layer. Labels prepared from the facestock and the labelstock also are described.

Physical properties of extruded, uniaxially oriented films useful in label manufacture and formed from blends of olefinic base materials and soft polar additives such as ethylene vinyl acetate (EVA) are changed in a directionally selective manner that improves abrasion resistance while preserving conformability by use of compatibilizers or coupling agents in the blends. Machine direction strength properties, including stiffness and tensile modulus, increase with little or no degradation of cross-direction elongation, and with limited degradation of cross-direction tensile modulus, both required for good label conformability.

Uniaxially oriented label film with compatibilizer

Machine-direction oriented polypropylene homopolymer and propylene copolymer films are described wherein the propylene copolymer is one selected from the group consisting of propylene-ethylene copolymers containing up to about 10% by weight of ethylene and propylene-1-butene copolymers containing up to about 15% by weight of 1-butene wherein the oriented films has an opacity of less than about 10% and a haze of about 10% or less in the machine-direction and in the cross-direction.

Clear conformable oriented films and labels

A die-cut label is described which is prepared from a composite which comprises (A) an extruded cast multilayer film oriented in the machine-direction at a stretch ratio between about 2 and about 9 which comprises (A-1) at least one skin layer comprising an olefin-SPA blend comprising from about 30% to about 60% by weight of SPA; and (A-2) at least one relatively thick inner layer comprising a mixture of an olefin-SPA blend and a compatibilizer wherein the mixture comprises greater than 15% by weight up to about 40% by weight SPA, and wherein the total thickness of said at least one skin layer (A-1) and said inner layer (A-2) is less than about 3 mils; and (B) an adhesive layer associated with said film for adhering said label to a substrate.

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Perry, OH, United States of America

Donald F Kimes