Method of making a composite web

• US 20040103979A1
• Filed: 09/11/2003
• Published: 06/03/2004
• Est. Priority Date: 10/17/2002
• Status: Abandoned Application

• Current Assignee: Reifenhauser GmbH & Company Maschinenfabrik
• Original Assignee: Reifenhauser GmbH & Company Maschinenfabrik
• Inventors: Kramer, Walter
• Application Number:
  US10/660,373
• Publication Number:
  US 20040103979A1
• Time in Patent Office: Days
• US Class Current: 156/167
• CPC Class Codes: B32B 2037/148 whereby layers material is selected in order to facilitate recycling of the laminate
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 37/1292 selectively, e.g. in stripes, in patterns B32B37/0076 takes precedence
• CPC Class Codes: B32B 5/022 Non-woven fabric
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B32B 7/14 applied in spaced arrangements, e.g. in stripes

Abstract

A composite is first formed by depositing on a breathable but water-impermeable synthetic resin film, a multiplicity of molten binding polymer threads from a multiplicity of orifices so that there is substantial space between the threads. A second web, e.g. an open-pore structure is then bonded to the first web by the molten thread so that the composite retains the flexibility and softness of the open-pore structure and the breathability of the film.

Claims

1. A method of making a composite web comprising the steps of:

(a) applying to a first web from a multiplicity of nozzle orifices a multiplicity of thread-shaped strands of a molten bonding polymer and bonding said strands to said first web in a pattern leaving bonding-polymer-free regions on said first web; and

(b) applying a second web to the strands of molten bonding polymer and bonding said second web to said strands, one of said first and second webs being a foil and the other of said first and second webs having an open-pore structure.

2. The method defined in claim 1 wherein said other web is formed as a nonwoven fleece or a textile.

3. The method defined in claim 2 wherein said foil is formed as a synthetic resin foil web.

4. The method defined in claim 3 said first web is formed as a synthetic resin foil web and said second web is formed as a nonwoven fleece or a textile.

5. The method defined in claim 4 wherein said molten bonding polymer is deposited on said first web in thread-shaped strands of a thickness of 10 to 50 μ

m.

6. The method defined in claim 5 wherein said thickness is maintained at 10 to 40 μ

m.

7. The method defined in claim 6 wherein said thickness is maintained at 10 to 30 μ

m.

8. The method defined in claim 5 wherein the bonding polymer is deposited on said first web in the form of bonding polymer threads in a wave pattern.

9. The method defined in claim 5 wherein the bonding polymer is deposited on said first web by at least one melt-blown nozzle.

10. The method defined in claim 5 wherein at least one of said webs is formed from a polyolefin.

11. The method defined in claim 5 wherein the bonding polymer is applied to said first web in an amount of 0.75 to 5 g/m².

12. The method defined in claim 5 wherein the bonding polymer is applied to said first web in an amount of 1 to 4 g/m².

13. The method defined in claim 1 wherein said foil is formed as a synthetic resin foil web.

14. The method defined in claim 1 said first web is formed as a synthetic resin foil web and said second web is formed as a nonwoven fleece or a textile.

15. The method defined in claim 1 wherein said molten bonding polymer is deposited on said first web in thread-shaped strands of a thickness of 10 to 50 μ

m.

16. The method defined in claim 15 wherein said thickness is maintained at 10 to 40 μ

m.

17. The method defined in claim 16 wherein said thickness is maintained at 10 to 30 Am.

18. The method defined in claim 1 wherein the bonding polymer is deposited on said first web in the form of bonding polymer threads in a wave pattern.

19. The method defined in claim 1 wherein the bonding polymer is deposited on said first web by at least one melt-blown nozzle.

20. The method defined in claim 1 wherein at least one of said webs is formed from a polyolefin.