Production of a dyed patterned web

• US 20040182261A1
• Filed: 12/19/2003
• Published: 09/23/2004
• Est. Priority Date: 12/20/2002
• Status: Active Grant

• Current Assignee: SCA Hygiene Products AB
• Original Assignee: SCA Hygiene Products AB
• Inventors: Fernfors, Ingemar, Nilsson, Urban, Linder, Michael
• Granted Patent: US 6,926,950 B2
• Time in Patent Office: Days
• US Class Current: 101/125
• CPC Class Codes: B41F 19/02 with embossing
• CPC Class Codes: Y10T 428/24826 Spot bonds connect components
• CPC Class Codes: Y10T 428/249978 Voids specified as micro
• CPC Class Codes: Y10T 428/24998 Composite has more than two layers
• CPC Class Codes: Y10T 428/249981 Plural void-containing components
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component

Abstract

The present invention relates to a method for production of a three-dimensional dyed macropattern in a web of web-shaped flexible material. The method comprises a bonding device being made, in interaction with the dye-coated tops of the raised macroportions, to form bonding points and three-dimensional bonding areas at the same time as the bonding areas and/or the bonding points are dyed, thereby forming a three-dimensional dyed macropattern.

Claims

1. A method for production of a three-dimensional dyed macropattern in a web of web-shaped flexible material, comprising:

bringing at least parts of a pattern device having a three-dimensional macropattern of alternate raised macroportions and lowered macroportions, into contact with a dye-application device in such a way that a dye is applied to the pattern device only on the tops of the raised macroportions;

bringing a web into contact with the tops of the dye-coated raised macroportions in such a way that dyeing of the web takes place in a dyed macropattern corresponding to the design of the tops of the raised macroportions; and

bringing the web into contact with a bonding device which forms bonding points in the web and also three-dimensional bonding areas coinciding with the bonding points,

wherein the bonding device is made, in interaction with the dye-coated tops of the raised macroportions, to form the bonding points and the three-dimensional bonding areas at the same time as the bonding areas and/or the bonding points are dyed thereby forming a three-dimensional dyed macropattern.

2. The method according to claim 1, wherein the web comprises a multilayer web including a first layer and a second layer of web-shaped flexible material, wherein the first layer is brought into contact with the tops of dye-coated raised macroportions, wherein the first layer is connected to the second layer in such a way that bonding points are formed between them, and wherein the bonding device forms the bonding points by joining the first layer to the second layer in interaction with the dye-coated tops, in which way the multilayer web is provided with the three-dimensional macropattern where the bonding areas and/or the bonding points are dyed.

3. The method according to claim 1, wherein the tops of the raised macroportions comprise a topographical surface comprising raised microportions, wherein the raised microportions are dye-coated and give rise to the three-dimensional dyed macropattern.

4. The method according to claim 1, wherein the pattern device forms the three-dimensional macropattern by means of an embossing roller.

5. The method according to claim 1, wherein at least parts of the web comprise thermally bondable material.

6. The method according to claim 5, wherein the bonding device forms bonding points via a melt in the web by use of an ultrasonic device.

7. The method according to claim 6, wherein the ultrasonic device is made to operate with a frequency above 18 kHz.

8. The method according to claim 7, wherein the bonding device forms bonding points in the web via a melt by use of a support roller.

9. The method according to claim 1, wherein the dyeing takes place by means of a non-adhesive dye.

10. A web of web-shaped flexible material with a three-dimensional dyed macropattern, comprising:

dyed macropatterns;

bonding points and three-dimensional bonding areas coinciding with the bonding points,

wherein the bonding points comprise a solidified melt from joined material produced by a bonding device in interaction with the tops of the raised macroportions of a pattern device, and wherein the bonding areas and/or bonding points are dyed with a dye via the tops of the raised macroportions at the same time as the bonding points are formed, thereby forming the three-dimensional dyed macropattern.

11. The web according to claim 10, wherein the three-dimensional macropattern comprises a number of micropatterns, said micropattern having been applied to the web via raised microportions located on the tops of the raised macroportions.

12. The web according to claim 10, wherein the dye is non-adhesive.

13. The web according to claim 10, comprising a multilayer web including a first layer and a second layer of web-shaped flexible material, wherein the first layer is dyed via the tops of the raised macroportions and is connected to the second layer via the bonding points, and wherein the bonding points were formed by the bonding device joining the first layer to the second layer in interaction with the dye-coated tops at the same time as the bonding areas and/or the bonding points were dyed, thereby obtaining the three-dimensional dyed macropattern in the multilayer web.

14. The web according to claim 10, wherein the web comprises thermally bondable material.

15. The web according to claim 10, wherein the melt was produced by means of an ultrasonic device or in a press nip.

16. The web according to claim 10, wherein the dye in the bonding points is fixed in the bonding points via the melt.

17. A device for production of a three-dimensional dyed macropattern in a web of flexible material, comprising:

a pattern device having a three-dimensional macropattern of alternate raised macroportions and lowered macroportions;

a dye-application device arranged so as to apply a dye only to the tops of the raised macroportions, wherein the pattern device is arranged so as to dye the web with the dyed macropattern;

a bonding device arranged so as to form bonding points in the web and three-dimensional bonding areas coinciding with the bonding points, wherein the bonding device is arranged so as, in interaction with dye-coated tops of the raised macroportions, to form the bonding points and the three-dimensional bonding areas at the same time as the bonding areas and/or the bonding points are dyed, thereby forming a three-dimensional dyed macropattern.

18. The device according to claim 17, wherein the web comprises a multilayer web with a first layer and a second layer of web-shaped flexible material, the first layer being arranged so as to be brought into contact with the tops of the dye-coated raised macroportions, and wherein the first layer is arranged so as, in the bonding device, to be connected to the second layer at bonding points between them, wherein the bonding device forms the bonding points by joining the first layer to the second layer in interaction with the dye-coated tops, such that the multilayer web is provided with a three-dimensional pattern where the bonding areas and/or the bonding points are dyed.

19. The device according to claim 17, wherein the tops of the raised macroportions comprise a topographical surface including raised microportions, wherein the raised microportions are arranged so as to be dye-coated and to give rise to the three-dimensional dyed macropattern.

20. The device according to claim 17, wherein the pattern device comprises an embossing roller.

21. The device according to claim 17, wherein at least parts of the web comprise thermally bondable material.

22. The device according to claim 17, wherein the bonding device comprises an ultrasonic device.

23. The device according to claim 22, wherein the ultrasonic device is arranged so as to operate with a frequency above 18 kHz.

24. The device according to claim 17, wherein the bonding device comprises a support roller.