Fiber laminate and method of making same

• US 20050042964A1
• Filed: 07/30/2004
• Published: 02/24/2005
• Est. Priority Date: 08/20/2003
• Status: Abandoned Application

• Current Assignee: Reifenhauser GmbH & Company Maschinenfabrik
• Original Assignee: Reifenhauser GmbH & Company Maschinenfabrik
• Inventors: Sommer, Sebastian, Kunze, Bernd
• Application Number:
  US10/912,739
• Publication Number:
  US 20050042964A1
• Time in Patent Office: Days
• US Class Current: 442/382
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 5/022 Non-woven fabric
• CPC Class Codes: B32B 5/26 another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: D04H 13/00 Other non-woven fabrics
• CPC Class Codes: D04H 3/11 by fluid jet
• CPC Class Codes: Y10T 442/66 Additional nonwoven fabric is a spun-bonded fabric
• CPC Class Codes: Y10T 442/668 Separate nonwoven fabric layers comprise chemically different strand or fiber material
• CPC Class Codes: Y10T 442/68 Melt-blown nonwoven fabric
• CPC Class Codes: Y10T 442/681 Spun-bonded nonwoven fabric
• CPC Class Codes: Y10T 442/696 Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]
• CPC Class Codes: Y10T 442/697 Containing at least two chemically different strand or fiber materials

Abstract

A fiber laminate, especially an absorbent wiping cloth, wherein at least one layer of a spun-bonded web and at least one layer of meltblown fibers is provided. Furthermore, at least one layer of hydrophilic fibers is present. Some of the meltblown fibers are also distributed in the layer of spun-bonded web and/or in the layer of the hydrophilic fibers.

Claims

1. A fiber laminate comprising:

at least one layer of a spun-bond web;

at least one meltblown layer comprised of meltblown fibers; and

at least one layer of hydrophilic fibers, at least some of said meltblown fibers from said meltblown layer being distributed in at least one of the other layers.

2. The fiber laminate defined in claim 1 wherein said meltblown layer is on said layer of said spun-bond web.

3. The fiber laminate defined in claim 2 wherein some of said meltblown fibers are distributed in said layer of said spun-bond web.

4. The fiber laminate defined in claim 3 wherein some of said meltblown fibers are distributed in said layer of hydrophilic fibers.

5. The fiber laminate defined in claim 4 wherein at least one further layer of a spun-bond web is provided on said layer of hydrophilic fibers.

6. The fiber laminate defined in claim 1 wherein said meltblown fibers are comprised at least in part of at least one elastomer.

7. The fiber laminate defined in claim 6 wherein said elastomer is selected from the group which consists of polyurethane and EPDM rubber.

8. A method of making a fiber laminate which comprises the steps of:

(a) forming a layer of a spun-bond web;

(b) applying to said layer of said spun-bond web, a meltblown layer of meltblown fibers;

(c) additionally providing at least one layer of hydrophilic fibers to form a layer aggregate; and

(d) consolidating said layer aggregate in such manner as to distribute meltblown fibers from said meltblown layer in at least one other of said layers.

9. The method defined in claim 8, further comprising the step of precompacting at least one of said layer of spun-bond web and said meltblown layer.

10. The method defined in claim 9 wherein said layer aggregate is hydrodynamically consolidated.

11. The method defined in claim 8 wherein said layer aggregate is hydrodynamically consolidated.

12. The method defined in claim 8 wherein said layer aggregate in such manner as to distribute meltblown fibers from said meltblown layer in both of the others of said layers.

13. The method defined in claim 12 wherein said layer aggregate is needled through by water jets from at least one side.