Method of making disposable nonwoven articles with microwave activatable hot melt adhesive
AssigneeAto Findley, Inc.
InventorsMark D. Alper, Diane M. Strelow
Life of this patent
Estimating the term…
Abstract
A method of utilizing microwave energy in the manufacture of disposable nonwoven absorbent articles such as diapers and feminine care products. More specifically, the traditional hot melt adhesives utilized in the production of disposable nonwoven absorbent articles are replaced by adhesives that are microwave sensitive, and which can be activated by microwave energy to provide strong bonds for the finished article.
Claims31
A method of bonding an absorbent core to another substrate of a disposable nonwoven absorbent article including the steps of:
- mixing an absorbent material with a microwave activatable adhesive, said adhesive includes as components thereof about 10-90% by weight of a polymer, about 10-60% by weight of a tackifying resin, about 0-50% by weight of a plasticizer, and about 0.1-2% by weight of an antioxidant, the components totaling 100% by weight;
- forming the absorbent material and adhesive into an absorbent core;
- applying a substrate to at least one surface of said absorbent core;
- and
- subjecting said adhesive to microwaves to activate the adhesive and bond said substrate to said absorbent core.
A method of bonding a first substrate to a second substrate of a disposable nonwoven absorbent article, including the steps of:
- feeding a first substrate and a second substrate, said second substrate to be bonded to said first substrate, toward a laminating station;
- applying a microwave activatable adhesive to a surface of at least one of said first and second substrates prior to said substrates reaching said laminating station, said adhesive includes as components thereof about 10-90% by weight of a polymer, about 10-60% by weight of a tackifying resin, about 0-50% by weight of a plasticizer, and about 0.1-2% by weight of an antioxidant, the components totaling 100% by weight;
- combining said first and second substrates and said adhesive together at said laminating station to form a laminate;
- and
- subjecting said adhesive to microwaves to activate the adhesive and bond said second substrate to said first substrate.
A method of bonding absorbent material together for use as an absorbent core of a disposable nonwoven absorbent article including the steps of:
- mixing an absorbent material with a microwave activatable adhesive, said adhesive includes as components thereof about 10-90% by weight of a polymer, about 10-60% by weight of a tackifying resin, about 0-50% by weight of a plasticizer, and about 0.1-2% by weight of an antioxidant, the components totaling 100% by weight;
- forming the absorbent material and adhesive into a non-self-supporting absorbent core;
- and
- subjecting said core and adhesive to microwaves to activate the adhesive and bond said absorbent material together to form a cohesive self-supporting absorbent core.
Dependencies are inferred from the claim text.