Method for manufacturing a laminated film

Patent metadata

Field	Value
Publication number	US-9862172-B2
Application number	US-201314404042-A
Country	US
Kind code	B2
Filing date	May 30, 2013
Priority date	May 30, 2012
Publication date	Jan 9, 2018
Grant date	Jan 9, 2018

Abstract

The present disclosure relates to a method for manufacturing the laminated film that is BSPC (Back Side Printable Clear) and has excellent interlayer adhesion. The method involves a first UV curing step and a second UV curing step and the laminated film includes a transparent film layer, a UV curable ink layer, and an adhesive layer. The first UV curing step includes disposing the UV curable ink layer on the transparent film layer and partially curing the UV curable ink layer by performing a first UV irradiation. The second UV curing step includes disposing the adhesive layer on a surface of the UV curable ink layer opposite the transparent film layer, and further curing the UV curable ink layer by performing a second UV irradiation.

First claim

The invention claimed is:

1. A method for manufacturing a laminated transparent film comprising:
disposing an UV curable ink layer to a first side of a transparent film having a first and second side, then partially curing the UV curable ink layer by exposing the UV curable ink layer to ultraviolet radiation with an irradiance less than 0.5 J/cm 2 ;
disposing an adhesive layer onto the partially cured UV curable ink layer;
within an hour after the partial curing step, curing the UV curable ink layer by exposing the UV curable ink layer to ultraviolet radiation with an irradiance of between 0.5 J/cm 2 to 1.5 J/cm 2 .

2. The method of claim 1 wherein disposing the UV curable ink layer on the transparent film layer comprises printing the UV curable ink on the transparent film by inkjet printing.

3. The method of claim 1 wherein disposing the adhesive layer onto the partially cured UV curable ink layer comprises coating the adhesive layer on the partially cured UV curable ink layer.

4. The method of claim 1 wherein the adhesive layer is transparent with respect to light having a wavelength of 200˜800 nm and the second curing step is carried out with radiation through the adhesive layer.

5. The method of claim 1 wherein the laminated transparent film is approximately 50 to approximately 150 μm thick.

6. The method of claim 1 wherein the adhesive layer is a removable pressure sensitive adhesive layer.

7. The method of claim 1 , wherein disposing an adhesive layer onto the partially cured UV curable ink layer comprises laminating a film of adhesive onto the partially cured UV curable ink layer.

8. The method of claim 1 , wherein a carrier film is disposed on the second side of the transparent film, opposite the UV curable ink layer.

Assignees

• 3M Innovative Properties Co

Inventors

• Ikeda Shinji
• Abe Hidetoshi
• Araki Yoshinori
• Saito Koji
• Ohtomo Shinya
• Kesti Michael R

Classifications

• B32B2305/72

  Cured, e.g. vulcanised, cross-linked · CPC title

• B41M2205/10

  Post-imaging transfer of imaged layer; transfer of the whole imaged layer · CPC title

• B32B2307/412

  Transparent · CPC title

• B41M7/0081

  using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams · CPC title

• B32B37/12 Primary

  characterised by using adhesives · CPC title