EP0033235A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Process for making absorbent articles
Assignee: Unilever PLC
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Filing: 1981-01-23
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Granted: —
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Expires: 2001-01-23
Abstract
Abstract The invention concerns a process for manufacturing a water-absorbent article in which particles of a water-swellable polymer are fixed to a water-absorbent substrate. The process includes the steps of forming on the surface of the water-swellable particles a coating of a thermoplastic adhesive resin; locating the coated particles in their unswollen and dry state on or within the water-absorbent substrate also in the dry state; and applying heat to soften the thermoplastic coating of the particles and pressing the particles and substrate to cause the particles to be bound to the substrate.
Inventors
- 👤 Roger Brian Dehnel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 02:25
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; A61F; A61F13/00; A61F13/00987; A61F13/00991; A61F13/15; A61F13/20; A61F13/2002; A61F13/202; A61F13/53; A61F2013/530481; A61F2013/530489; A61F2013/530496; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249962; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2998
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
89 words
A process for manufacturing a water-absorbent article in which particles of a water-swellable polymer are fixed to a water-absorbent substrate, which process comprises: 1 forming on the surface of the water-swellable particles a coating of a thermoplastic adhesive resin; 2 locating the coated particles in their unswollen and dry state on or within the water-absorbent substrate also in the dry state; and '3 applying heat to soften the thermoplastic coating of the particles and pressing the particles and substrate to cause the particles to be bound to the substrate.
Claim 2
Dependent Claim
89 words
A process for manufacturing a water-absorbent article in which particles of a water-swellable polymer are fixed to a water-absorbent substrate, which process comprises: 1 forming on the surface of the water-swellable particles a coating of a thermoplastic adhesive resin; 2 locating the coated particles in their unswollen and dry state on or within the water-absorbent substrate also in the dry state; and '3 applying heat to soften the thermoplastic coating of the particles and pressing the particles and substrate to cause the particles to be bound to the substrate.
Claim 3
Dependent Claim
21 words
A process as claimed in Claim 1, wherein the thermoplastic coated absorbent particles have an absorbency efficiency of at least 75%.
Claim 4
Dependent Claim
27 words
A process as claimed in Claim 1 or Claim 2, wherein the weight ratio of the thermoplastic resin to the water-swellable polymer is from 1:20 to 1:1.
Claim 5
Dependent Claim
48 words
A process as claimed in any of the preceding claims, wherein the coated particles are bound to the substrate by passing the water-absorbent substrate on or within which the coated particles have been located through the nip of pair of rollers at least one of which is heated.
References Cited (Backward Citations)
No citation records indexed.
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