EP0432489A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heat-adhesive composite fiber and nonwoven fabric made by using same
Assignee: Teijin Ltd
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Filing: 1990-11-14
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Granted: —
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Expires: 2010-11-14
Abstract
Abstract A heat-adhesive synthetic composite fiber useful as a bonding fiber for producing a nonwoven fabric by a wet sheet-forming method, comprises (A) an ethylene-vinyl alcohol copolymer filamentary constituent and (B) a metal sulfonate group-containing copolyester filamentary constituent incorporated to the ethylene-vinyl alcohol copolymer filamentary constituent (A) to form a composite fiber; the ethylene-vinyl alcohol copolymer filamentary constituent being exposed to the outside in at least a portion of the peripheral surface of the composite fiber.
Inventors
- 👤 Takanori Shinoki
- 👤 Tsukasa Kobayashi
- 👤 Yasuo Yamamura
- 👤 Ryuji Uemura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 12:29
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D01; D01F; D01F8/00; D01F8/04; D01F8/16; D04H1/42; D04H1/4382; D04H1/43825; D04H1/43832; D01F8/10; D01F8/14; D04H1/43828; D04H1/4383; D04H1/43835; D04H3/00; D04H3/08; D04H3/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
154 words
A heat-adhesive synthetic composite fiber comprising: (A) an ethylene-vinyl alcohol copolymer filamentary constituent comprising a saponification product of a copolymer of (a) 30 to 70 molar% of ethylene with (b) 70 to 30 molar% of vinyl acetate, at a degree of saponification of at least 98%, and extending along the longitudinal axis of the composite fiber; and (B) a copolyester filamentary constituent comprising a copolyesterification product of (c) a dicarboxylic acid component comprising (i) 1.0 to 10.0 molar% of at least one organic dicarboxylic acid compound having at least one metal sulfonate group and (ii) the balance consisting of at least one aromatic dicarboxylic acid compound, with (d) a diol component comprising at least one diol compound, extending along the longitudinal axis of the composite fiber, and incorporated to the ethylene-vinyl alcohol copolymer filamentary constituent, said ethylene-vinyl alcohol copolymer filamentary constituent forming at least a portion of the peripheral surface of the composite fiber.
Claim 2
Dependent Claim
154 words
A heat-adhesive synthetic composite fiber comprising: (A) an ethylene-vinyl alcohol copolymer filamentary constituent comprising a saponification product of a copolymer of (a) 30 to 70 molar% of ethylene with (b) 70 to 30 molar% of vinyl acetate, at a degree of saponification of at least 98%, and extending along the longitudinal axis of the composite fiber; and (B) a copolyester filamentary constituent comprising a copolyesterification product of (c) a dicarboxylic acid component comprising (i) 1.0 to 10.0 molar% of at least one organic dicarboxylic acid compound having at least one metal sulfonate group and (ii) the balance consisting of at least one aromatic dicarboxylic acid compound, with (d) a diol component comprising at least one diol compound, extending along the longitudinal axis of the composite fiber, and incorporated to the ethylene-vinyl alcohol copolymer filamentary constituent, said ethylene-vinyl alcohol copolymer filamentary constituent forming at least a portion of the peripheral surface of the composite fiber.
Claim 3
Dependent Claim
29 words
The composite fiber as claimed in claim 1, wherein the ethylene-vinyl alcohol copolymer filamentary constituent and the metal sulfonate group-modified copolyester filamentary constituent are incorporated in a side-by-side arrangement.
Claim 4
Dependent Claim
37 words
The composite fiber as claimed in claim 1, wherein a core composed of the metal sulfonate group-containing copolyester filamentary constituent is surrounded by a sheath composed of the ethylene-vinyl alcohol copolymer filamentary constituent in a core-in-sheath arrangement.
Claim 5
Dependent Claim
32 words
The composite fiber as claimed in claim 1, wherein the ethylene-vinyl alcohol copolymer filamentary constituent is in an amount of 10 to 80% based on the total weight of the composite fiber.
Claim 6
Dependent Claim
21 words
The composite fiber as claimed in claim 1, wherein the ethylene-vinyl alcohol copolymer has a melting point of at least 120°C.
Claim 7
Dependent Claim
17 words
The composite fiber as claimed in claim 1, wherein the aromatic dicarboxylic acid compound is terephthalic acid.
Claim 8
Dependent Claim
24 words
The composite fiber as claimed in claim 1, wherein the diol compound is selected from the group consisting of ethylene glycol and butylene glycol.
Claim 9
Dependent Claim
36 words
The composite fiber as claimed in claim 1, wherein the metal sulfonate group-comprising organic dicarboxylic acid is selected from the group consisting of metal sulfonate group-containing isophthalic acids, 1,4-metal sulfonaphthalene 2,6-dicarboxylic acid and 1-metal sulfonaphthalene-2,6-dicarboxylic acid.
Claim 10
Dependent Claim
31 words
A nonwoven fabric produced by a wet sheet-forming method from an aqueous slurry containing the heat-adhesive composite fibers as defined in claim 1 and at least one other type of fibers.
Claim 11
Dependent Claim
31 words
The nonwoven fabric as claimed in claim 9, wherein the heat adhesive composite fibers are in an amount of at least 5% based on the total weight of the nonwoven fabric.
Claim 12
Dependent Claim
36 words
The nonwoven fabric as claimed in claim 9, wherein the other type of fibers is selected from the group consisting of inorganic fibers, cellulosic fibers, polyolefin fibers, polyester fibers, polyamide fibers, polyacrylic fibers and aramid fibers.
References Cited (Backward Citations)
No citation records indexed.
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