Non-PVC Label Film for Printing

Patent metadata

Field	Value
Publication number	US-2016303833-A1
Application number	US-201615098367-A
Country	US
Kind code	A1
Filing date	Apr 14, 2016
Priority date	Apr 15, 2015
Publication date	Oct 20, 2016
Grant date	—

Abstract

Various polymeric compositions are described which are particularly well suited for use in forming films for printing. The films can be incorporated in label assemblies and can be subjected to high temperature printing operations without exhibiting excessive curling or other undesirable properties.

First claim

What is claimed is:

1 . A film comprising a blend of:
at least one polyolefin having a Tg less than 20° C.; at least one polymer having a Tg of at least 80° C.; wherein the weight proportion of the at least one polymer having a Tg of at least 80° C. is at least 10% based upon the total weight of the film, the film is free of polyvinyl chloride, and the film exhibits a shrinkage of less than 1% after exposure to 100° C. for 1 hour.

2 . The film of claim 1 wherein the at least one polyolefin having a Tg less than 20° C. is selected from the group consisting of polyethylene, polypropylene, polyethylene polypropylene copolymer, polyolefin elastomer, modified polyolefin, and combinations thereof.

3 . The film of claim 1 wherein the at least one polymer having a Tg of at least 80° C. is selected from the group consisting of polystyrene, impact modified polystyrene, polystyrene based copolymer, cyclic polyolefin copolymers including norbornene, nylon, polycarbonates, polyesters, acrylics, polyimide, and combinations thereof.

4 . The film of claim 1 wherein the film also comprises at least one additive.

5 . The film of claim 4 wherein the additive is selected from the group consisting of an antiblock agent, a processing aid, a slip agent, an antistatic agent, a pigment, a cavitating agent, an inorganic filler, an antioxidant, and combinations thereof.

6 . A multilayer film comprising:
a first layer including at least one polyolefin having a Tg less than 20° C.; a second layer including at least one polymer having a Tg of at least 80° C.; wherein the weight proportion of the at least one polymer having a Tg of at least 80° C. is at least 10% based upon the total weight of the film, and the film is free of polyvinyl chloride.

7 . The multilayer film of claim 6 further comprising:
a third layer disposed between the first layer and the second layer.

8 . The multilayer film of claim 7 wherein the composition of the third layer is the same as the composition of at least one of the first layer and the second layer.

9 . The multilayer film of claim 7 wherein the composition of the third layer is different than the composition of at least one of the first layer and the second layer.

10 . The multilayer film of claim 6 further comprising:
a third layer, the first layer disposed between the second layer and the third layer.

11 . The multilayer film of claim 10 wherein the composition of the third layer is the same as the composition of at least one of the first layer and the second layer.

12 . The multilayer film of claim 10 wherein the composition of the third layer is different than the composition of at least one of the first layer and the second layer.

13 . The multilayer film of claim 6 further comprising:
a third layer, the second layer disposed between the first layer and the third layer.

14 . The multilayer film of claim 13 wherein the composition of the third layer is the same as the composition of at least one of the first layer and the second layer.

15 . The multilayer film of claim 13 wherein the composition of the third layer is different than the composition of at least one of the first layer and the second layer.

16 . The film of claim 6 wherein the at least one polyolefin having a Tg less than 20° C. is selected from the group consisting of polyethylene, polypropylene, polyethylene polypropylene copolymer, polyolefin elastomer, modified polyolefin, and combinations thereof.

17 . The film of claim 6 wherein the at least one polymer having a Tg of at least 80° C. is selected from the group consisting of polystyrene, impact modified polystyrene, polystyrene based copolymer, cyclic polyolefin copolymers including norbornene, nylon, polycarbonates, polyesters, acrylics, polyimide, and combinations thereof.

18 . The film of claim 6 wherein the film also comprises at least one additive.

19 . The film of claim 18 wherein the additive is selected from the group consisting of an antiblock agent, a processing aid, a slip agent, an antistatic agent, a pigment, a cavitating agent, an inorganic filler, an antioxidant, and combinations thereof.

20 . The film of claim 6 wherein the film exhibits a shrinkage of less than 1% after exposure to 100° C. for 1 hour.

21 . A coated film comprising:
a film including a blend of (i) at least one polyolefin having a Tg less than 20° C., (ii) at least one polymer having a Tg of at least 80° C., wherein the weight proportion of the at least one polymer having a Tg of at least 80° C. is at least 10% based upon the total weight of the film, and the film is free of polyvinyl chloride; the film defining an outer surface; a coating disposed on the outer surface of the film.

22 . The coated film of claim 21 wherein the coating is an ink receptive coating.

23 . The coated film of claim 21 wherein the coating is a heat insulating coating comprising particles selected from the group consisting of porous silica particles, porous non-silica particles, and combinations thereof.

24 . The coated film of claim 21 wherein the coating is a microporous foam coating.

25 . A coated film comprising:
a multilayer film including (i) a first layer including at least one polyolefin having a Tg less than 20° C., (ii) a second layer including at least one polymer having a Tg of at least 80° C., wherein the weight proportion of the at least one polymer having a Tg of at least 80° C. is at least 10% based upon the total weight of the film, and the film is free of polyvinyl chloride; the multilayer film defining an outer surface; a coating disposed on the outer surface of the multilayer film.

26 . The coated film of claim 25 wherein the coating is an ink receptive coating.

27 . The coated film of claim 25 wherein the coating is a heat insulating coating comprising particles selected from the group consisting of porous silica particles, porous non-silica particles, and combinations thereof.

28 . The coated film of claim 25 wherein the coating is a microporous foam coating.

29 . A label laminate comprising:
a film including a blend of (i) at least one polyolefin having a Tg less than 20° C., (ii) at least one polymer having a Tg of at least 80° C., wherein the weight proportion of the at least one polymer having a Tg of at least 80° C. is at least 10% based upon the total weight of the film, and the film is free of polyvinyl chloride; pressure sensitive adhesive disposed on the film; a release liner disposed on the pressure sensitive adhesive.

30 . The label laminate of claim 29 wherein the at least one polyolefin having a Tg less than 20° C. is selected from the group consisting of polyethylene, polypropylene, polyethylene polypropylene copolymer, polyolefin elastomer, modified polyolefin, and combinations thereof.

31 . The label laminate of claim 29 wherein the at least one polymer having a Tg of at least 80° C. is selected from the group consisting of polystyrene, impact modified polystyrene, polystyrene based copolymer, cyclic polyolefin copolymers including norbornene, nylon, polycarbonates, polyesters, acrylics, polyimide, and combinations thereof.

32 . The label laminate of claim 29 wherein the film also comprises at least one additive.

33 . The label l

Assignees

• Avery Dennison Corp

Inventors

• Wang Shanshan
• Arnett Melissa
• Bland David G
• Chen Wen-Li A
• Xu Ben

Classifications

• C08L23/0853

  Ethylene vinyl acetate copolymers · CPC title

• B32B2519/00

  Labels, badges · CPC title

• B32B27/08 Primary

  of synthetic resin · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• G09F3/02

  Forms or constructions (layered products B32B) · CPC title