EP0100370A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for producing paper or non-woven fabric
Assignee: Teijin Ltd
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Filing: 1982-07-31
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Granted: —
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Expires: 2002-07-31
Abstract
Abstract A process for producing paper or wet non-woven fabric comprising mixing an aqueous anionic polymer solution with an aqueous cationic polymer solution, adding the mixture to a slurry of fiber or pulp, converting the slurry into paper or non-woven fabric by a wet papermaking technique, and drying the paper or non-woven fabric. The paper or non-woven fabric advantageously has an excellent strength, water resistance, and thermal resistance.
Inventors
- 👤 Tadashi Hirakawa
- 👤 Makoto Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 19:32
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/53; D21H17/34; D21H17/36; D21H17/41; D21H17/42; D21H17/44; D21H17/54; D21H17/55
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
52 words
A process for producing paper or wet non-woven fabric comprising mixing an aqueous anionic polymer solution with an aqueous cationic polymer solution, adding the mixture to a slurry of fiber or pulp, converting the slurry into paper or non-woven fabric by a wet papermaking technique, and drying the paper or non-woven fabric.
Claim 2
Dependent Claim
52 words
A process for producing paper or wet non-woven fabric comprising mixing an aqueous anionic polymer solution with an aqueous cationic polymer solution, adding the mixture to a slurry of fiber or pulp, converting the slurry into paper or non-woven fabric by a wet papermaking technique, and drying the paper or non-woven fabric.
Claim 3
Dependent Claim
13 words
A process as claimed in claim 1, wherein said mixture contains solid aggregate.
Claim 4
Dependent Claim
13 words
A process as claimed in claim 1, wherein said mixture contains liquid aggregate.
Claim 5
Dependent Claim
45 words
A process as claimed in claim 2 or 3, wherein the cationic polymer is a polymer having at least one reactive group selected from the group consisting of epoxy, N--methylol, and isocyanate groups on at least a part of the ends and side chains thereof.
Claim 6
Dependent Claim
14 words
A process as claimed in claim 4, wherein the cationic polymer is polyamide-polyamine epichlorohydrin.
Claim 7
Dependent Claim
43 words
A process as claimed in claim 2, wherein the anionic polymer is a copolyester containing polyethylene glycol as the diol component and isophthalic acid and an aromatic dicarboxylic acid having a sodiosulfo group bound to the aromatic nucleus as the dicarboxylic acid component.
Claim 8
Dependent Claim
19 words
A process as claimed in claim 3, wherein the anionic polymer is sodium carboxylate- or sodium sulfonate--modified polyvinyl alcohol.
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UST881008I4
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WO1982001020A1
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