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Patent

Stabilized polyvinyl alcohol binder solution for water-flushable non-woven webs

D Duchane
TLDR
In this paper, a BINDER MIXTURE is used to connect a non-woven web platform with an ORGANIC ACID in the presence of an ALKALINE BORATE.
Abstract: 
A STABILIZED HIGH SOLIDS CONTENT BINDER MIXTURE FOR BONDING NON-WOVEN WEBS TO PROVIDE A WATER-FLUSABLE WRAPPER FOR ABSORBENT PADS SUCH AS SANITARY MAPKINS, DIAPERS AND THE LIKE. THE MIXTURE COMPRISES AN ACIDFIED SOLUTION OF COLD-WATER SOLUBLE POLYVINYL ALCOHOL CONTAINING AN ALKALINE BORATE AND A RELATIVELY UNSTABLE ORGANIC ACID. THE ORGANIC ACID TEMPORARILY ACIDIFIES THE SOLUTION TO PERMIT THE POLYVINYL ALCOHOL TO BE UTILIZED IN A RELATIVELY HIGH SOLIDS CONCENTRATION IN THE PRESENCE OF ALKALINE BORATE WITHOUT PREMATURE GELLING. SUITABLE ORGANIC ACIDS INCLUDE ACETOACETIC ACID AND ACETONE DICARBOXYLIC ACID/ AFTER THE BINDER MIXTURE IS APPLIED TO A NON-WOVEN WEB, THE HEAT USED IN DURING BREAKS DOWN THE ORGANIC ACID INTO ACETONE AND CARBON DIOXIDE. THE DECOMPOSITION OF THE ACID AND SUBSEQUENT ESCAPE OF ITS CONSTITUENTS TO THE ATMOSPHERE RAISES THE PH OF THE MIXTURE WHEREBY THE BORAX CROSS-LINKS WITH THE POLYVINYL ALCOHOL TO RENDER IT TEMPORARILY INSOLUBLE.

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Patent

Ion-sensitive, water-dispersible polymers, a method of making same and items using same

Douglas Bryan Cole, +9 more
TL;DR: In this article, a method of making ion-sensitive, water-dispersible polymers and their applicability as binder compositions is presented, and the present method is further directed to fiber-containing fabrics and webs.
Patent

Breathable, multilayered, clothlike barrier

Ralph Victor Braun, +3 more
TL;DR: A breathable, multilayer, cloth-like barrier especially suitable for use as an outer cover or baffle in such disposable absorbent articles as diapers, sanitary napkins, and incontinent pads is described in this article.
Patent

Flushable binder system for pre-moistened wipers wherein an adhesive for the fibers of the wipers interacts with ions contained in the lotion with which the wipers are impregnated

Eugenio G. Varona
TL;DR: In this article, a three component adhesive is used for a nonwoven web in combination with a water-based lotion containing borate ions, which provides the tensile strength for the web during prolonged exposure to the water based lotion even under extreme temperature conditions.
Patent

Premoistened, flushable, disposable and biodegradable wet wipes

Richards Marc F, +1 more
TL;DR: In this paper, a pre-moistened, dispersible, and biodegradable wet wipe comprising a web of nonwoven fibers contacted with a PVOH containing binder is presented.
Patent

Ion-sensitive hard water dispersible polymers and applications therefor

Yihua Chang, +2 more
TL;DR: In this paper, a method of making ion-sensitive, hard water dispersible polymers and their applicability as binder compositions is described, and the present invention is further directed to fiber-containing fabrics and webs comprising ion-sensors, hard-water dispersible binder composition.