EP0321237A2
Expired / Lapsed
EP
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High strength wet-laid nonwoven fabric and process for producing same
Assignee: Asahi Kasei Corp
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Filing: 1988-12-15
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Granted: —
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Expires: 2008-12-15
Abstract
Abstract Provided is a high strength wet-laid nonwoven fabric having strength, i.e., tensile strength, tear strength and interlayer peeling strength, similar to those of a filament nonwoven fabric, and a uniformity similar to that of a conventional wet-laid nonwoven fabric. This nonwoven fabric is made of a fiber having a fiber diameter of from 7 µm to 25 µm and a ratio L/D of from 0.8 x 10³ to 2.0 x 10³ and is produced by entangling the fibers in a sheet made by a paper making machine by using a columnar water stream.
Inventors
- 👤 Kenji Nakamae
- 👤 Tsukasa Shima
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 18:06
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4391; D21; D21H; D21H15/00; D21H15/02; D21H15/06; D04H1/4326; D04H1/4334; D04H1/435; D04H1/44; D04H1/46; D04H1/492; D21H13/00; D21H13/10; D21H13/12; D21H13/14; D21H13/20; D21H13/26; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/689
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
55 words
A high strength wet-laid nonwoven fabric composed of staple fibers having a single fiber diameter D of from 7µm to 25 µm and a ratio L/D between a fiber length L and the single fiber diameter D of from 0.8 x 10³ to 2.0 x 10³, said staple fibers being entangled in a three-dimensioned state.
Claim 2
Dependent Claim
55 words
A high strength wet-laid nonwoven fabric composed of staple fibers having a single fiber diameter D of from 7µm to 25 µm and a ratio L/D between a fiber length L and the single fiber diameter D of from 0.8 x 10³ to 2.0 x 10³, said staple fibers being entangled in a three-dimensioned state.
Claim 3
Dependent Claim
20 words
A nonwoven fabric according to claim 1, wherein a mean fiber entangling point interval is 300 µm or the less.
Claim 4
Dependent Claim
39 words
A nonwoven fabric according to claim 1, wherein said staple fiber is one or more selected from a group comprising a polyester fiber, a polyamide fiber, a polyacrylic fiber, a polyethylene fiber, a polypropylene fiber and a regenerated fiber.
Claim 5
Dependent Claim
21 words
A nonwoven fabric according to claim 1, wherein a Young's modulus of a fiber is from 50 kg/mm² to 700 kg/mm².
Claim 6
Dependent Claim
23 words
A nonwoven fabric according to any one of claims 1 to 3, wherein an interlayer peeling strength thereof is 1 kg/cm or more.
Claim 7
Dependent Claim
78 words
A process for producing a high strength wet-laid nonwoven fabric, wherein a sheet is produced from staple fibers having a single fiber diameter D of from 7 µm to 25 µm and a ratio L/D between a fiber length L and the single fiber diameter D of from 0.8 x 10³ to 2.0 x 10³, and said staple fibers in the sheet are entangled in a three-dimensional state by applying a high speed liquid stream to the sheet.
Claim 8
Dependent Claim
78 words
A process for producing a high strength wet-laid nonwoven fabric, wherein a sheet is produced from staple fibers having a single fiber diameter D of from 7 µm to 25 µm and a ratio L/D between a fiber length L and the single fiber diameter D of from 0.8 x 10³ to 2.0 x 10³, and said staple fibers in the sheet are entangled in a three-dimensional state by applying a high speed liquid stream to the sheet.
Claim 9
Dependent Claim
32 words
A method in according to claim 5, wherein said high speed liquid stream is a columnar water stream and a pressure of the water stream is from 20 kg/cm² to 200 kg/cm².
References Cited (Backward Citations)
No citation records indexed.
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