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US 2011/0209839 A1Published application
Method for making absorbent products
AssigneeRayonier TRS Holdings Inc.
InventorsPhyllis Leithem, Clarles A. Kremers, W. Paul Harrell, Stephen Lewis, Karl D. Sears, Quan He, Peter R. Abitz
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Abstract
A method of making personal hygiene articles of high absorbency from cellulosic fiber pulp without chemical cross-linking of the cellulosic fibers is disclosed. The method comprises interposing a sublayer of mechanically fluffed alkali extracted cellulosic fiber pulp between a fluid permeable layer and a fluid impermeable layer.
Claims19
A method for making an absorbent composite useful for personal hygiene articles comprising:
- treating a wood fiber pulp with an alkali solution at a temperature below 60° C. and thereby forming an alkali-treated fiber wood pulp;
- drying and fluffing the alkali-treated wood fiber pulp to form an absorbent sublayer material which is without chemical crosslinking;
- providing at least one fluid permeable topsheet layer and at least one substantially fluid impermeable backsheet layer;
- and interposing the sublayer material between the topsheet layer and the backsheet layer.
1 more element
A method for making an absorbent composite useful for personal hygiene articles comprising:
- (a) creating a suspension of about 2% to about 25% by weight of a cellulosic fiber pulp in an alkali solution having an alkali concentration from about 2% to about 25% by weight and a temperature below about 50° C.;
- (b) maintaining said cellulosic fiber pulp in said suspension for a treatment time between about 2 to about 10 minutes to obtain an alkali extracted cellulosic fiber pulp having improved absorbency characteristics;
- (c) recovering said alkali extracted cellulosic fiber pulp from said suspension;
- (d) drying said alkali extracted cellulosic fiber pulp;
- (e) fluffing said alkali extracted cellulosic fiber pulp;
- (f) forming an absorbent layer from said alkali extracted cellulosic fiber pulp without chemical crosslinking thereof;
- (g) providing at least one fluid permeable layer;
- and
- (h) incorporating said absorbent layer into an absorbent structure wherein the absorbent layer is at least partially covered by said fluid permeable layer.
6 more elements
Dependencies are inferred from the claim text.