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US 4,260,443 AGranted
Laminated absorbent process
AssigneeGrain Processing Corporation
InventorsWilliam F. Lindsay, Robert A. Meintrup, Howard J. Slawny
Life of this patent
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Abstract
A laminate of tissue-like materials having a liquid absorbing agent fixed in position between lamina.
Claims4
A process for producing a liquid absorbing laminated structure which comprises:
- (a) distributing in dry form onto a first sheet a liquid absorbing material which when moistened with water exhibits adhesive properties,
- (b) superimposing a second water-permeable sheet on said first sheet,
- (c) applying water at spaced points to said second sheet to moisten said liquid absorbing agent and cause it to serve as an adhesive at said points, and
- (d) then applying pressure to force together said sheets whereby a laminated structure is produced having the water absorbing agent distributed therein in substantially immobilized condition.
1 more element
A process for producing a liquid absorbing laminated structure which comprises:
- (a) distributing in dry form onto a first sheet a liquid absorbing material which when moistened with water exhibits adhesive properties,
- (b) superimposing a second water-permeable sheet on said first sheet having the liquid absorbing agent distributed thereon,
- (c) embossing said superimposed sheets,
- (d) applying water to the embossed portions only of said sheets to moisten said liquid absorbing agent and cause it to serve as an adhesive at the location of said embossed portions, and
- (e) then applying pressure to force together said sheets whereby a laminated structure is produced having the water absorbing agent distributed therein in substantially immobilized condition.
2 more elements
A process for producing a liquid absorbing laminated structure which comprises:
- (a) distributing onto a first sheet a hydrocolloidal polymer material in dry form, said material when moistened with water exhibiting adhesive properties,
- (b) superimposing a second water-permeable sheet on said first sheet, said second sheet being a tissue web having a basis weight of from about 8 lbs. to about 40 lbs. per 3,000 square foot ream,
- (c) embossing said superimposed sheets to create land areas in said second sheet occupying from about 1% to about 50% of the surface thereof,
- (d) applying from about 0.5% to about 30% water based on the weight of said laminated structure to said land areas only to moisten said material and cause it to serve as an adhesive at the location of said land areas, and
- (e) then applying pressure to force together said sheets whereby a laminated structure is produced having the material distributed therein in substantially immobilized condition.
2 more elements
Dependencies are inferred from the claim text.