EP0099428A1
Expired / Lapsed
EP
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Absorbent web structure
Assignee: Mitsui Chemicals Inc
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Filing: 1982-07-16
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Granted: —
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Expires: 2002-07-16
Abstract
Abstract An absorbent web structure composed of a mixture of 5 to 50% by weight of short fibers of a thermoplastic resin rendered hydrophilic with a surface-active agent and 95 to 50% by weight of cellulosic fibers, said thermoplastic short fibers being melt-bonded to impart self-supporting property to the web structure; wherein (i) said thermoplastic short fibers have been rendered hydrophilic by forming an aqueous slurry of the fibers containing a nonionic surface-active agent and then dehydrating the slurry, and (ii) said nonionic surface-active agent has (a) an HLB value of from 2 to 20 and (b) a melting point equal to, or higher than, the temperature of the slurry at the time of said dehydrating treatment.
Inventors
- 👤 Koji Horimoto
- 👤 Yoshinori Morita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:05
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/48
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
An absorbent web structure composed of a mixture of 5 to 50% by weight of short fibers of a thermoplastic resin rendered hydrophilic with a surface-active agent and 95 to 50% by weight of cellulosic fibers, said thermoplastic short fibers being melt-bonded to impart self-supporting property to the web structure; characterized in that (i) said thermoplastic short fibers have been rendered hydrophilic by forming an aqueous slurry of the fibers containing a nonionic surface-active agent and then dehydrating the slurry, and (ii) said nonionic surface-active agent has (a) an HLB value of from 2 to 20 and (b) a melting point equal to, or higher than, the temperature of the slurry at the time of said dehydrating treatment.
Claim 2
Dependent Claim
118 words
An absorbent web structure composed of a mixture of 5 to 50% by weight of short fibers of a thermoplastic resin rendered hydrophilic with a surface-active agent and 95 to 50% by weight of cellulosic fibers, said thermoplastic short fibers being melt-bonded to impart self-supporting property to the web structure; characterized in that (i) said thermoplastic short fibers have been rendered hydrophilic by forming an aqueous slurry of the fibers containing a nonionic surface-active agent and then dehydrating the slurry, and (ii) said nonionic surface-active agent has (a) an HLB value of from 2 to 20 and (b) a melting point equal to, or higher than, the temperature of the slurry at the time of said dehydrating treatment.
Claim 3
Dependent Claim
22 words
A structure according to claim 1 wherein a synthetic pulp composed of flash-spun fibers of the thermoplastic resin is used in (i).
Claim 4
Dependent Claim
18 words
A structure according to claim 2 wherein the synthetic pulp is a synthetic pulp treated with polyvinyl alcohol.
Claim 5
Dependent Claim
27 words
A structure according to claim 1, 2 or 3 wherein the temperature of the slurry at the time of said dehydrating treatment is not more than 50°C.
Claim 6
Dependent Claim
36 words
A structure according to any one of the preceding claims wherein the take-up of the nonionic surface-active agenf in the thermoplastic short fibers is 0.1 to 5% by weight based on the weight of the fibers.
Claim 7
Dependent Claim
24 words
A structure according to any one of the preceding claims wherein the nonionic surface-active agent has a melting point of at least about 50°C.
Claim 8
Dependent Claim
18 words
A structure according to any one of the preceding claims wherein the thermoplastic resin is an olefin resin.
Claim 9
Dependent Claim
31 words
A structure according to any one of the preceding claims wherein the melt-bonding temperature is from the melting point of the thermoplastic resin to a temperature about 50°C higher than it.
References Cited (Backward Citations)
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