Face films and pressure sensitive laminates for printing

Patent metadata

Field	Value
Publication number	US-2017259604-A1
Application number	US-201715435256-A
Country	US
Kind code	A1
Filing date	Feb 16, 2017
Priority date	Mar 8, 2016
Publication date	Sep 14, 2017
Grant date	—

Abstract

Microporous structures in face films are described for improving printability of the films. Also described are laminates and pressure sensitive adhesive laminates including the microporous structured face films. Various related methods are additionally described.

First claim

What is claimed is:

1 . A polymeric film adapted for absorbing liquid inks from inkjet printing, the film defining a first face for receiving print, and a second oppositely directed face, the film including a microporous structure extending along at least the first face, wherein the microporous structure has a porosity within a range from 40% to 75%, the microporous structure includes a plurality of interconnected pores having a pore size distribution within a range of from 2 microns to 10 nm, the microporous structure has a thickness of at least 20 microns as measured from the first face, and the film exhibits an ink absorption rate of at least 0.01 picoliter/μm 2 /second at a printing temperature of 40° C.

2 . The film of claim 1 comprising at least one polyolefin.

3 . The film of claim 2 wherein the film comprises at least 30% polyolefins.

4 . The film of claim 3 wherein the film comprises at least 40% polyolefins.

5 . The film of claim 4 wherein the comprises at least 50% polyolefins.

6 . The film of claim 2 wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, polyethylene copolymer, polypropylene copolymer, and combinations thereof.

7 . The film of claim 1 wherein the porosity is within a range from 40% to 70%.

8 . The film of claim 7 wherein the porosity is within a range of from 40% to 60%.

9 . The film of claim 1 wherein the microporous structure extends through the entire thickness as measured between the first face and the second face.

10 . The film of claim 1 wherein the film includes a plurality of layers differing in chemical composition and disposed between the first face and the second face.

11 . The film of claim 10 wherein the plurality of layers includes a first layer constituting the first face and a second layer constituting the second face.

12 . The film of claim 11 wherein the microporous structure extends entirely through the first layer.

13 . The film of claim 12 wherein the microporous structure extends at least partially through the second layer.

14 . The film of claim 13 wherein the microporous structure extends entirely through the second layer.

15 . The film of claim 1 comprising at least one inorganic filler.

16 . The film of claim 15 wherein the at least one inorganic filler is present within a range of from 30% to 70% by weight.

17 . The film of claim 1 further including a coating disposed on at least one of the first face and the second face, wherein the coating includes a microporous structure to thereby improve ink anchorage or surface smoothness.

18 . The film of claim 1 further including a coating disposed on at least one of the first face and the second face, wherein the coating includes a surfactant which increases surface energy of the coating to thereby increase liquid absorption.

19 . The film of claim 1 wherein the film comprises:
at least one polyolefin; and
at least one polymer incompatible with the at least one polyolefin, the at least one polymer selected from the group consisting of polystyrene, styrene copolymer, polyurethane, polyester, polyacryl resin, polymethacryl resin, polycarbonate, ionomers, and combinations thereof.

20 . A laminate comprising:
a polymeric film adapted for absorbing liquid inks from inkjet printing, the film defining a first face for receiving print, and a second oppositely directed face, the film including a microporous structure extending along at least the first face, wherein the microporous structure has a porosity within a range from 40% to 75%, the microporous structure includes a plurality of interconnected pores having a pore size distribution within a range of from 2 microns to 10 nm, the microporous structure has a thickness of at least 20 microns as measured from the first face, and the film exhibits an ink absorption rate of at least 0.01 picoliter/μm 2 /second at a printing temperature of 40° C.; at least one core layer disposed along the second face of the film.

21 . The laminate of claim 20 wherein the film includes at least one polyolefin.

22 . The laminate of claim 21 wherein the film comprises at least 30% polyolefins.

23 . The laminate of claim 22 wherein the film comprises at least 40% polyolefins.

24 . The laminate of claim 23 wherein the film comprises at least 50% polyolefins.

25 . The laminate of claim 21 wherein the polyolefin is selected from the group consisting of polyethylene, polypropylene, polyethylene copolymer, polypropylene copolymer, and combinations thereof.

26 . The laminate of claim 20 wherein the porosity is within a range from 40% to 70%.

27 . The laminate of claim 26 wherein the porosity is within a range of from 40% to 60%.

28 . The laminate of claim 20 wherein the microporous structure extends through the entire thickness of the film as measured between the first face and the second face.

29 . The laminate of claim 20 wherein the film includes a plurality of layers differing in chemical composition and disposed between the first face and the second face.

30 . The laminate of claim 29 wherein the plurality of layers includes a first layer constituting the first face and a second layer constituting the second face.

31 . The laminate of claim 30 wherein the microporous structure extends entirely through the first layer.

32 . The laminate of claim 31 wherein the microporous structure extends at least partially through the second layer.

33 . The laminate of claim 32 wherein the microporous structure extends entirely through the second layer.

34 . The laminate of claim 20 wherein the core layer is a solid nonporous film.

35 . The laminate of claim 20 wherein the core layer is a porous film.

36 . The laminate of claim 35 wherein the porous film includes a microporous structure that has a porosity within a range of from 40% to 75%.

37 . The laminate of claim 35 wherein the porous film includes a microporous structure that includes a plurality of interconnected pores having a pore size distribution within a range of from 2 microns to 10 nm.

38 . The laminate of claim 20 wherein the film comprises at least one inorganic filler.

39 . The laminate of claim 38 wherein the at least one inorganic filler is present within a range of from 30% to 70% by weight.

40 . The laminate of claim 20 further including a coating disposed on the first face of the film, wherein the coating includes a microporous structure to thereby improve ink anchorage or surface smoothness.

41 . The laminate of claim 20 further including a coating disposed on the first face of the film, wherein the coating includes a surfactant which increases surface energy of the coating to thereby increase liquid absorption.

42 . The laminate of claim 20 wherein the film comprises (i) at least one polyolefin, and (ii) at least one polymer selected from the group consisting of polystyrene, styrene copolymer, polyurethane, polyester, polyacryl resin, polymethacryl resin, polycarbonate, ionomers, and combinations thereof.

43 . An adhesive lamina

Assignees

• Avery Dennison Corp

Inventors

• Bland David
• Chen Wen-Li
• Ramsay Michael
• Wang Shanshan

Classifications

• B29C48/21

  the layers being joined at their surfaces · CPC title

• B41M5/5218

  characterised by inorganic additives, e.g. pigments, clays · CPC title

• B29C48/0018

  combined with shaping by orienting, stretching or shrinking, e.g. film blowing (B29C48/0017 takes precedence) · CPC title

• B29C48/022

  characterised by the choice of material · CPC title

• B41M5/52 Primary

  Macromolecular coatings · CPC title