EP0244486A1
Expired / Lapsed
EP
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Water absorbing material and method for its manufacture
Assignee: Resonac Holdings Corp
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Filing: 1986-05-16
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Granted: —
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Expires: 2006-05-16
Abstract
Abstract Use of a multi-layer film made of at least two kinds of thermoplastic resins having different melting points. The cross-sectional construction of a multi-layer film or a tape obtained from the multi-layer film or the like is applied to the cross-sectional construction of a fiber with the cross-sectional construction of the former left as it is, i.e., a very simple means for making fiber of a multi-layer film or a tape obtained therefrom is utilized, thus providing a conjugated fiber far superior to the conventional thermo-bondable conjugated fiber produced by a melt-spinning method and a water-absorbing material using such a superior conjugated fiber, and methods of manufacturing them.
Inventors
- 👤 Toyoaki Kawasaki Jushi Kenkyusho Of Showa Tanaka
- 👤 Akira Kawasaki Jushi Kenkyusho Of Showa Nakamura
- 👤 Yoshisuke Kawasaki Jushi Kenkyusho Of Showa Kamei
- 👤 Akihiro Kawasaki Jushi Kenkyusho Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 23:05
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; D01; D01D; D01D5/00; D01D5/42; D01F; D01F8/00; D01F8/04; Y; Y10; Y10S; Y10S57/00; Y10S57/907; Y10T; Y10T428/00; Y10T428/249921; Y10T428/29; Y10T428/2904; Y10T428/2909; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T428/2929; Y10T428/2931; Y10T442/00; Y10T442/60; Y10T442/637
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
67 words
A composite fibre characterized in that a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film are Used as a base material, said base material being formed into fibres by a splitting after being subjected to stretching, said fibres having the same sectional construction as that of the base material.
Claim 2
Dependent Claim
67 words
A composite fibre characterized in that a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film are Used as a base material, said base material being formed into fibres by a splitting after being subjected to stretching, said fibres having the same sectional construction as that of the base material.
Claim 3
Dependent Claim
72 words
A composite fibre characterized in that a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film are used as a base material, said base material being formed into fibres by discontinuous splitting after being subjected to stretching, said fibres having the same sectional construction as that of the base material and being branched by splitting.
Claim 4
Dependent Claim
72 words
A composite fibre characterized in that a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film are used as a base material, said base material being formed into fibres by discontinuous splitting after being subjected to stretching, said fibres having the same sectional construction as that of the base material and being branched by splitting.
Claim 5
Dependent Claim
22 words
A composite fibre as defined in claim 1 and 2, wherein each of the fibres have the length and coarseness formed unevenly.
Claim 6
Dependent Claim
30 words
A composite fibre as defined in claim 1 and 2, wherein in a composite fiber comprising more than three layers, resins'having a low melting point are used as external layers.
Claim 7
Dependent Claim
35 words
A composite fibre as defined in claim 1 and 2, wherein said low melting point resin comprises high-degree polyethylene, linear polyethylene, nylon 6, etc., and the high melting point resin comprises polypropylene, adhesive polyolefin, etc.
Claim 8
Dependent Claim
20 words
A composite fibre as defined in claim 1 and 2, wherein some or all layers constituting the fibre are colored.
Claim 9
Independent Claim
76 words
A method for producing a composite fibre, the method comprising slitting a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another into stretched tapes having a required width, discontinuously splitting said stretched tapes completely or at fixed intervals by a splitting roll, and forming the resulting tapes into a single fibre or a net-like fibre having the same sectional construction as that of said multi-layer film.
Claim 10
Independent Claim
76 words
A method for producing a composite fibre, the method comprising slitting a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another into stretched tapes having a required width, discontinuously splitting said stretched tapes completely or at fixed intervals by a splitting roll, and forming the resulting tapes into a single fibre or a net-like fibre having the same sectional construction as that of said multi-layer film.
Claim 11
Independent Claim
98 words
A method for producing a composite fibre, the method comprising slitting a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another into stretched tapes having a required width, discontinuously splitting said stretched tape completely or at fixed intervals by a splitting roll, forming the resulting tapes into a single fibre or a net-like fibre having the same sectional construction as that of said multi-layer film, cutting said fibre into short fibres of 70 to 90 m/m, and thereafter 'splitting the net-like fibre into branched fibres by carding process.
Claim 12
Independent Claim
98 words
A method for producing a composite fibre, the method comprising slitting a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another into stretched tapes having a required width, discontinuously splitting said stretched tape completely or at fixed intervals by a splitting roll, forming the resulting tapes into a single fibre or a net-like fibre having the same sectional construction as that of said multi-layer film, cutting said fibre into short fibres of 70 to 90 m/m, and thereafter 'splitting the net-like fibre into branched fibres by carding process.
Claim 13
Dependent Claim
91 words
A water-absorbing material using a composite fibre as a base material characterized in that a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film are used as a base material, said water-absorbing material comprising a blend of short fibres of the composite fibre formed into fibres by splitting after said base material has been stretched and having the same sectional construction as that of said base material, a pulp and a high molecular absorbent.
Claim 14
Dependent Claim
91 words
A water-absorbing material using a composite fibre as a base material characterized in that a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film are used as a base material, said water-absorbing material comprising a blend of short fibres of the composite fibre formed into fibres by splitting after said base material has been stretched and having the same sectional construction as that of said base material, a pulp and a high molecular absorbent.
Claim 15
Independent Claim
132 words
A method for producing a water-absorbing materal using a composite fibre as a base material, the method comprising using a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film, as a base material, blening short fibres of the composite fibre formed into fibres by splitting after said base material has been stretched and having the same sectional construction as that of said base material, a pulp and a high molecular absorbent, heating said blend to a level in the vicinity of a melting point of a low melting point resin of the composite resin, and partially fusing the short fibres to form a water-absorbing material in which said pulp is mixed between the short fibres.
Claim 16
Independent Claim
132 words
A method for producing a water-absorbing materal using a composite fibre as a base material, the method comprising using a multi-layer film comprising at least two layers and formed from thermoplastic resins different in melting point from one another or tapes obtained from said multi-layer film, as a base material, blening short fibres of the composite fibre formed into fibres by splitting after said base material has been stretched and having the same sectional construction as that of said base material, a pulp and a high molecular absorbent, heating said blend to a level in the vicinity of a melting point of a low melting point resin of the composite resin, and partially fusing the short fibres to form a water-absorbing material in which said pulp is mixed between the short fibres.
Claim 17
Dependent Claim
33 words
An absorbent. using a composite fibre as a base material as defined in claim 9 and 10, wherein the water absorbing material is used as an absorbent for paper diapers or toilet articles.
References Cited (Backward Citations)
No citation records indexed.
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