Patent EP0176316A2 successfully refreshed from Google Patents.
EP0176316A2
Expired / Lapsed
EP
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A process for the production of a non woven fabric of water soluble resin fibres
Assignee: Tonen General Sekiyu KK
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Filing: 1985-09-18
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Granted: —
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Expires: 2005-09-18
Abstract
Abstract A nonwoven fabric consisting of water-soluble resin fine fibers having a mean fiber diameter of 30 µm or less and a basis weight of 5 to 500 g/m 2. This can be produced by extruding an aqueous solution comprising a water-soluble resin or a melt of a water-soluble resin plasticized with water through nozzles, stretching the extruded material to form fibers by a high speed gas flow, heating the fibers to evaporate the water in the fibers and then collecting the fibers. The fabric is of use as a moisture absorptive material or as a packing material.
Inventors
- 👤 Shigeo Fujii
- 👤 Shoichi Mori
- 👤 Jyoichi Tabushi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 05:31
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; D04H1/42; D04H1/4382; D04H1/43838
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
27 words
A nonwoven fabric comprising water-soluble resin fibers having a mean fiber diameter of 30 pm or less and a basis weight of.5 to 500 g/m 2 .
Claim 2
Dependent Claim
27 words
A nonwoven fabric comprising water-soluble resin fibers having a mean fiber diameter of 30 pm or less and a basis weight of.5 to 500 g/m 2 .
Claim 3
Dependent Claim
33 words
A nonwoven fabric as claimed in claim 1, wherein the water-soluble resin is a water-soluble linear high molecular weight material having at least one -OH, -COOH or -CONH 2 group in the molecule.
Claim 4
Dependent Claim
43 words
A nonwoven fabric as claimed in claim 1, wherein the water-soluble resin is selected from pullulan, polyvinyl alcohol, polyacrylamide. polyacrylic acid, polymethacrylic acid, polyitaconic acid, polyethylene oxide, polyvinylpyrrolidone. polyvinyl methylene ether, hydroxy-propyl cellulose. xanthan gum, guar gum, collagen, hydroxy-ethyl cellulose, and mixtures thereof.
Claim 5
Dependent Claim
29 words
A nonwoven fabric as claimed any one of claims 1 to 3, wherein the water-soluble resin has a molecular weight of 2 to 200 x 1 0 4 .
Claim 6
Dependent Claim
45 words
A nonwoven fabric as claimed in any one of the preceding claims, wherein the water-soluble resin is mixed with at least one of water, sorbitol, maltitol, ethylene glycol, polypropylene glycol, apatite, silica, silicon carbide, silicon nitride, zeolite, activated carbon, alumina and rare earth element compounds.
Claim 7
Dependent Claim
59 words
A process for the production of a nonwoven fabric, which comprises extruding an aqueous solution containing a water-soluble resin or a melt of a water-soluble resin plasticized with water through nozzles, stretching the extruded material to form fibers by a high speed gas flow, heating the fibers to evaporate the water in the fibers and then collecting the fibers.
Claim 8
Dependent Claim
59 words
A process for the production of a nonwoven fabric, which comprises extruding an aqueous solution containing a water-soluble resin or a melt of a water-soluble resin plasticized with water through nozzles, stretching the extruded material to form fibers by a high speed gas flow, heating the fibers to evaporate the water in the fibers and then collecting the fibers.
Claim 9
Dependent Claim
23 words
A process as claimed in claim 6, wherein the water soluble resin is as defined in any one of claims 2 to 5.
Claim 10
Dependent Claim
29 words
A process as claimed in claim 6 or claim 7, wherein the water-soluble resin is contained in a proportion of 5 to 95% by weight in the aqueous solution.
Claim 11
Dependent Claim
40 words
A process as claimed in any one of claims 6 to 8, wherein the high speed gas flow is blown against the extruded material at a linear velocity of 10 to 1000 m/sec and a temperature of 20 to 60°C.
Claim 12
Dependent Claim
23 words
A process as claimed in any one of claims 6 to 9, wherein the fibers have a diameter of 0.1 to 30 µm.
Claim 13
Dependent Claim
46 words
A process as claimed in any one of claims 6 to 10, wherein the heating of the fibers is carried out in such a manner that the water content in the fibers is at most 10% by weight, preferably at a temperature of 80 to 120°C.
Claim 14
Dependent Claim
29 words
A process as claimed in any one of claims 6 to 11, wherein the fibers are collected by the use of net-shaped or porous revolving drums or moving belts.
Claim 15
Dependent Claim
32 words
A process as claimed in claim 12, wherein the fibers are collected by blowing the fibers against the contact point of two net-type revolving drums or against a flat plate moving belt.
Claim 16
Dependent Claim
26 words
The use of a non-woven fabric as claimed in any one of claims 1 to 5, as a moisture absorptive material or as a packaging material.
References Cited (Backward Citations)
No citation records indexed.
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