Patent EP0472355A1 successfully refreshed from Google Patents.
EP0472355A1
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EP
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Hydroentangled nonwoven fabric containing synthetic fibers having a ribbon-shaped crenulated cross-section and method of producing the same
Assignee: Fort James Corp
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Filing: 1991-08-14
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Granted: —
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Expires: 2011-08-14
Abstract
Abstract A hydroentangled nonwoven fabric containing ribbon shaped staple synthetic fibers having a crenulated cross-section and formed from a wet-laid web containing such crenulated fibers, preferably a blend thereof with short natural fibers, such as wood fibers. The use of a wet-laid web containing such crenulated synthetic fibers enables optimal interaction with the hydroentanglement jets of water, and a reduced level of hydroentanglement energy is required to achieve the desired performance characteristics in the fabric.
Inventors
- 👤 James H. Manning
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 06:09
CPC Classifications
D; D21; D21H; D21H15/00; D21H15/02; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/48; D04H1/49; D04H1/492; D21H13/00; D21H13/10; D21H13/12; D21H13/14; D21H13/16; D21H13/20; D21H13/24; D21H13/26; D21H25/00; D21H25/005; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2965; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/627; Y10T442/632; Y10T442/633; Y10T442/689
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
46 words
A high strength nonwoven wet-laid hydroentangled fabric formed of at least 15% by weight, based upon the total weight of the fabric, of staple synthetic fibers, said synthetic fibers having a ribbon-shaped crenulated transverse cross-section and being randomly interlocked with each other in a three-dimensional matrix.
Claim 2
Dependent Claim
50 words
The fabric of claim 1, wherein said fibers in said web have transverse cross-sections wherein the widths thereof are greater than the thicknesses thereof and the surfaces across the widths of a substantial portion of said synthetic fibers are substantially parallel to the plane of said web prior to hydroentanglement.
Claim 3
Dependent Claim
25 words
The fabric of claim 1 or claim 2 wherein said fabric is comprised of a blend of said staple synthetic fibers and short natural fibers.
Claim 4
Dependent Claim
12 words
The fabric of claim 3, wherein said natural fibers are wood fibers.
Claim 5
Dependent Claim
23 words
The fabric of any one of claims 1 to 4 wherein said synthetic fibers are formed of polyester, acrylic, polyamide, or polyolefin resins.
Claim 6
Dependent Claim
32 words
The fabric of any one of claims 1 to 5, wherein said staple synthetic fibers are in the size range of about 0.5 to 4.0 denier by about 1/2" to 1" long.
Claim 7
Dependent Claim
34 words
The fabric of any one of claims 1 to 6, wherein a substantial portion of said synthetic fibers in said wet-laid web have the widths thereof substantially parallel to the plane of said web.
Claim 8
Independent Claim
52 words
A method of forming a high-strength nonwoven fabric comprising forming a wet-laid web containing at least 15%, by weight, of staple synthetic fibers having a ribbon-shaped crenulated transverse cross section and hydroentangling said wet-laid web under hydroentanglement conditions so as to cause said staple fibers to become randomly interlocked with each other.
Claim 9
Dependent Claim
48 words
The method of claim 8, wherein said staple synthetic fibers of said web have a transverse cross-section wherein the width thereof is greater than the thickness thereof and wherein a substantial portion of the surfaces across the widths thereof are substantially parallel to the plane of said fabric.
Claim 10
Dependent Claim
24 words
The method of claim 8 or claim 9 wherein said web is formed from an aqueous dispersion of said fibers containing an associative thickener.
Claim 11
Independent Claim
36 words
The method of any one of claims 8 to 10 wherein said web is formed from a foamed furnish comprising a dispersion of said fibers in a foamed liquid comprising water and a surface active agent.
Claim 12
Independent Claim
27 words
The method of any one of claims 8 to 11, wherein said web is formed of a uniform blend of said synthetic fibers and short natural fibers.
Claim 13
Dependent Claim
44 words
The method of claim 12, wherein said blend comprises from about 15% to about 90%, by weight, of said synthetic fibers and from about 85% to about 10%, by weight, of said short natural fibers, both based upon the total weight of said web.
Claim 14
Dependent Claim
23 words
The method of claim 12 or claim 13, wherein said synthetic fibers are polyester fibers and said short natural fibers are wood fibers.
References Cited (Backward Citations)
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