Method for digitally printing containers and container having at least one print or printed image

• US 9,365,010 B2
• Filed: 05/19/2011
• Issued: 06/14/2016
• Est. Priority Date: 09/02/2010
• Status: Active Grant

• Current Assignee: KHS GmbH (Salzgitter AG)
• Original Assignee: KHS GmbH (Salzgitter AG)
• Inventors: Preckel, Katrin, Schach, Martin, Reiniger, Markus
• Primary Examiner(s): Culler, Jill
• Application Number:
  US13/819,788
• Publication Number:
  US 20130157826A1
• Time in Patent Office: 1,853 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: B29B 17/02 Separating plastics from other materials
• CPC Class Codes: B29B 2017/0244 in liquids
• CPC Class Codes: B29B 2017/0289 Washing the materials in liquids
• CPC Class Codes: B29K 2067/003 PET, i.e. poylethylene terephthalate
• CPC Class Codes: B29L 2009/005 coated
• CPC Class Codes: B29L 2009/006 painted
• CPC Class Codes: B29L 2031/712 Containers; Packaging elements or accessories, Packages closures therefor B29L2031/56; ink or toner cartridges B29L2031/7678; squeeze tubes B29L2023/20; suitcases B29L2031/7418
• CPC Class Codes: B29L 2031/722 Decorative or ornamental articles
• CPC Class Codes: B31B 50/88 Printing; Embossing
• CPC Class Codes: B41M 2205/38 Intermediate layers; Layers between substrate and imaging layer
• CPC Class Codes: B41M 2205/40 Cover layers; Layers separated from substrate by imaging layer; Protective layers; Layers applied before imaging
• CPC Class Codes: B41M 3/008 Sequential or multiple printing, e.g. on previously printed background; Mirror printing; Recto-verso printing; using a combination of different printing techniques; Printing of patterns visible in reflection and by transparency; by superposing printed artifacts
• CPC Class Codes: B41M 5/0047 by ink-jet printing
• CPC Class Codes: B41M 5/0064 on plastics, horn, rubber, or other organic polymers
• CPC Class Codes: B65D 2203/02 Labels
• CPC Class Codes: B65D 2565/385 especially suited for or with means facilitating recycling
• CPC Class Codes: Y02W 30/52 Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
• CPC Class Codes: Y02W 30/62 Plastics recycling; Rubber recycling

Abstract

A method for digitally printing on containers by producing a printed multi-colored image on a print layer disposed on a middle layer, the middle layer being one of an intermediate layer and a base layer. The method includes applying the middle layer on an outer surface of a substrate formed by a container wall. An adhesion characteristic between the middle layer and the print layer differs from an adhesion characteristic between the middle layer and the substrate, wherein the adhesion characteristic is selected from the group consisting of adhesion strength and adhesion rate, and wherein the different adhesion characteristics are set by at least one of choice of materials used for the layers and crosslinking of the intermediate layer and the print layer.

Claims

1. A method for digitally printing on containers by producing a printed multi-colored image on a print layer disposed on a middle layer, said middle layer being one of an intermediate layer and a base layer, said method comprising applying said middle layer on an outer surface of a substrate formed by a container wall of said container, wherein an adhesion characteristic between said middle layer and said print layer differs from an adhesion characteristic between said middle layer and said substrate, wherein said adhesion characteristic is selected from the group consisting of adhesion strength and adhesion rate, and wherein said different adhesion characteristics are set by at least one of choice of materials used for said layers and crosslinking of said intermediate layer and said print layer, wherein said adhesion characteristics are set such that said adhesion characteristic between said middle layer and said substrate is greater than said adhesion characteristic between said middle layer and said print layer, wherein an inner adhesion of said print layer exceeds said adhesion characteristic between said middle layer and said print layer, wherein said adhesion characteristic between said middle layer and said substrate is consistent with grade “

1”

of FINAT test method number 21, as detailed in the 7^th Edition of the FINAT Technical Handbook published in 2005, and said adhesion characteristic between said print layer and said middle layer is consistent with grades “

2-3”

of said FINAT test method number 21.

2. A method for digitally printing on containers by producing a printed multi-colored image on a print layer disposed on a middle layer, said middle layer being one of an intermediate layer and a base layer, said method comprising applying said middle layer on an outer surface of a substrate formed by a container wall of said container, wherein an adhesion characteristic between said middle layer and said print layer differs from an adhesion characteristic between said middle layer and said substrate, wherein said adhesion characteristic is selected from the group consisting of adhesion strength and adhesion rate, and wherein said different adhesion characteristics are set by at least one of choice of materials used for said layers and crosslinking of said intermediate layer and said print layer, wherein said adhesion characteristics are set such that said adhesion characteristic between said middle layer and said substrate is less than said adhesion characteristic between said print layer and said middle layer, and wherein at least one of said middle layer and said print layer has an inner adhesion that is greater than said adhesion characteristic between said middle layer and said substrate.

3. The method of claim 2, wherein crosslinking/cross adhesion within said print layer is greater than said adhesion characteristic between said print layer and said middle layer at least by a factor of 1.5-2.

4. The method of claim 2, wherein at least one layer selected from said print layer and said middle layer is cross-linked in such a way that crosslinking/cross adhesion within said at least one layer is greater than said adhesion characteristic between said middle layer and said substrate.

5. The method of claim 2, wherein said middle layer and said print layer are cross-linked such that crosslinking/cross adhesion within said print layer exceeds said adhesion characteristic between said middle layer and said substrate, and such that said crosslinking/cross adhesion within said print layer also exceeds said adhesion characteristic between said print layer and said middle layer at least by a factor of 1.5-2.

6. The method of claim 2, wherein a layer selected from said print layer and said middle layer comprises a material that can be cross-linked by energy input, wherein said energy input comprises at least one of ultraviolet radiation, beta radiation, electron radiation, microwave radiation, and heat radiation.

7. The method of claim 2, wherein said middle layer is produced by one of mechanical application, chemical reaction, physical reaction, chemical deposition, physical deposition, and silicatizing with flame pyrolysis.

8. The method of claim 2, further comprising selecting said middle layer to include a material that acts as a gas barrier.

9. The method of claim 2, further comprising selecting said middle layer to include a material that prevents migration of color through said substrate during production of said printed image.

10. The method of claim 2, wherein said substrate is formed by a transparent container wall of a container, said method further comprising effecting cross-linking of said middle layer through energy input through said substrate.

11. A manufacture comprising a container having a multi-color printed image produced on a print layer by digital printing onto a middle layer that is applied to an outer surface of a substrate formed by a container wall of said container, wherein said middle layer comprises one of an intermediate layer and a base layer, wherein an adhesion characteristic is selected from the group consisting of adhesion strength and adhesion rate, wherein a first adhesion characteristic, which is an adhesion characteristic between said substrate and said middle layer, differs from a second adhesion characteristic, which is an adhesion characteristic between said middle layer and said print layer, wherein said different first and second adhesion characteristics are set by a choice of one of materials used for said layers and cross-linking of said middle layer and said print layer, wherein said adhesion characteristics are set such that said first adhesion characteristic is greater than said second adhesion characteristic, wherein an inner adhesion of said print layer exceeds said second adhesion characteristic, wherein said first adhesion characteristic is consistent with grade “

I”

of FINAT test method No. 21, as detailed in the 7^th Edition of the FINAT Technical Handbook published in 2005, and wherein said second adhesion characteristic is consistent with “

2-3”

of said FINAT test method No. 21.

12. A manufacture comprising a container having a multi-color printed image produced on a print layer by digital printing onto a middle layer that is applied to an outer surface of a substrate formed by a container wall of said container, wherein said middle layer comprises one of an intermediate layer and a base layer, wherein an adhesion characteristic is selected from the group consisting of adhesion strength and adhesion rate, wherein a first adhesion characteristic, which is an adhesion characteristic between said substrate and said middle layer, differs from a second adhesion characteristic, which is an adhesion characteristic between said middle layer and said print layer, wherein said different first and second adhesion characteristics are set by a choice of one of materials used for said layers and cross-linking of said middle layer and said print layer, wherein said first and second adhesion characteristics are set such that said first adhesion characteristic is less than said second adhesion characteristic, and wherein at least one of said middle layer and said print layer has an inner adhesion that is greater than said first adhesion characteristic.

13. The manufacture of claim 12, wherein a cross-linking/cross-adhesion within said print layer exceeds said second adhesion characteristic.

14. A manufacture according to claim 12, wherein a layer selected from the group consisting of said print layer and said middle layer is cross-linked in such a way that cross-linking/cross-adhesion within said layer exceeds said first adhesion characteristic.

15. The manufacture of claim 12, wherein said middle layer and said print layer are cross-linked in such a way that cross-linking/cross-adhesion within said print layer exceeds said first adhesion characteristic and exceeds said second adhesion characteristic by at least a factor of 1.5-2.

16. The manufacture of claim 12, wherein said middle layer comprises a material that exhibits barrier properties against at least one of carbon dioxide and oxygen gas.

17. The manufacture of claim 12, wherein said middle layer comprises a material that prevents migration of color through said substrate during production of said printed image.