Non-woven/sheet laminate

• US 20070224904A1
• Filed: 04/19/2005
• Published: 09/27/2007
• Est. Priority Date: 05/07/2004
• Status: Abandoned Application

• Current Assignee: Alexandra Steger
• Original Assignee: Alexandra Steger
• Inventors: Steger, Alexandra
• Application Number:
  US11/579,392
• Publication Number:
  US 20070224904A1
• Time in Patent Office: Days
• US Class Current: 442/381
• CPC Class Codes: A41D 13/12 Surgeons' or patients' gowns or dresses operating gloves A61B42/10
• CPC Class Codes: A41D 31/00 Materials specially adapted for outerwear
• CPC Class Codes: B32B 2307/73 Hydrophobic
• CPC Class Codes: B32B 2323/04 Polyethylene
• CPC Class Codes: B32B 2437/00 Clothing anti-ballistic clothing B32B2571/02
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• 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: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: Y10T 156/1092 All laminae planar and face to face
• CPC Class Codes: Y10T 428/24355 Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
• CPC Class Codes: Y10T 442/659 Including an additional nonwoven fabric
• CPC Class Codes: Y10T 442/66 Additional nonwoven fabric is a spun-bonded fabric
• CPC Class Codes: Y10T 442/68 Melt-blown nonwoven fabric
• CPC Class Codes: Y10T 442/681 Spun-bonded nonwoven fabric
• CPC Class Codes: Y10T 442/699 Including particulate material other than strand or fiber material

Abstract

A non-woven/sheet laminate comprises a sheet and a non-woven layer on each side of the sheet. At least one surface of the non-woven layer which forms one visible side of the laminate has a linting coefficient of less than 2.7.

Claims

1-26. -26. (canceled)

27. A non-woven/sheet laminate comprising:

a sheet having a first and a second side;

a first non-woven layer disposed on said first side of said sheet; and

a second non-woven layer disposed on said second side of said sheet, wherein a visible side of said second non-woven layer has a linting coefficient of less than 2.7 and a sliding coefficient of friction of between 0.35 and 0.75.

28. The non-woven/sheet laminate of claim 27, wherein said linting coefficient is less than 2.5.

29. The non-woven/sheet laminate of claim 28, wherein said linting coefficient is less than 2.2.

30. The non-woven/sheet laminate of claim 27, wherein said sliding coefficient of friction is between 0.40 and 0.70 or between 0.45 and 0.65.

31. The non-woven/sheet laminate of claim 27, wherein at least one of said first and said second non-woven layers comprises several layers.

32. The non-woven/sheet laminate of claim 31, wherein said several layers comprise spunbond and meltblown layers.

33. The non-woven/sheet laminate of claim 32, wherein at least one of said first and said second non-woven layers is a spunbond/meltblown/spunbond laminate.

34. The non-woven/sheet laminate of claim 32, wherein at least one of said first and said second non-woven layers is a spunbond/meltblown/meltblown/spunbond laminate.

35. The non-woven/sheet laminate of claim 27, wherein at least one of said first and said second non-woven layers is thermally solidified.

36. The non-woven/sheet laminate of claim 27, wherein at least one of said first and said second non-woven layers is hydrophobic.

37. The non-woven/sheet laminate of claim 27, wherein the laminate withstands a water column of W>

400 cm or of W>

500 cm.

38. The non-woven/sheet laminate of claim 27, wherein the laminate has a water vapor permeability of WVTR>

4000 g/m²/24 h.

39. The non-woven/sheet laminate of claim 27, wherein said sheet is microporous.

40. The non-woven/sheet laminate of claim 27, wherein said sheet comprises polyolefines or polyethylenes.

41. The non-woven/sheet laminate of claim 27, wherein said sheet comprises a non-polymeric, particulate filler or CaCO₃.

42. The non-woven/sheet laminate of claim 27, wherein the laminate is subjected to a thermal treatment process and associated reduction in length in a flat direction.

43. The non-woven/sheet laminate of claim 42, wherein said length is reduced in substantially one direction only.

44. The non-woven/sheet laminate of claim 27, wherein said first and said second the non-woven layers are connected to said sheet by an adhesive.

45. The non-woven/sheet laminate of claim 44, wherein said adhesive is not disposed on an entire surface.

46. The non-woven/sheet laminate of claim 44, wherein said adhesive is a hot fusion adhesive.

47. The non-woven/sheet laminate of claim 27, wherein the non-woven/sheet laminate is structured or symmetric relative to said sheet.

48. Use of the non-woven/sheet laminate of claim 27 for a disposable piece of clothing or for a disposable piece of clothing which can be sterilized.

49. A method of producing the non-woven/sheet laminate of claim 27, wherein a layer composite of sheet and non-woven layers connected to the sheet is subjected to thermal treatment, thereby reducing a length in a flat direction of the laminate.

50. The method of claim 49, wherein the thermal treatment is performed at a temperature between 45 and 100°

C., between 45° and

90°

C., between 45° and

80°

C., or between 50° and

65°

C.

51. The method of claim 49, wherein the length is reduced in substantially one direction only.

52. A disposable piece of clothing having surface-forming walls made from the non-woven/sheet laminate of claim 27.