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US 11,076,999 B2Granted
Absorbent articles and methods of making
Assignee3M Innovative Properties Company
InventorsJerald K. Rasmussen, Mahfuza B. Ali, Bathsheba E. Chong Conklin, Andrew P. Klein, Scott E. Langer
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Abstract
Described herein are absorbent articles and methods of making such articles. The articles are made by bonding a copolymer onto a substrate to form a core. The absorbent articles are particularly useful in personal care product, e.g., disposable hygiene products.
Claims20
An absorbent article comprising:
- a first substrate;
- and
- a layer of copolymer irreversibly bonded onto the first substrate to form a core, wherein the core comprises acidic functional groups,
- wherein the copolymer is derived from:
- a first monomer selected from a (meth)acrylic acid or salt thereof;
- a second monomer, wherein the second monomer is hydrophilic;
- and
- greater than 1 wt % of a third monomer based on the total weight of monomers used, wherein the third monomer is a hydrophilic crosslinking monomer,
- wherein at least 50% of the acidic functional groups in the core are neutralized with salt forming cations.
6 more elements
A method of making an absorbent article comprising:
- (a) contacting a polymerizable solution to a first substrate, wherein the polymerizable solution comprises (i) a first monomer selected from a (meth)acrylic acid or salt thereof;
- (ii) a second monomer, wherein the second monomer is hydrophilic;
- and (iii) greater than 1 wt % of a third monomer based on the total weight of monomers used, wherein the third monomer is a hydrophilic crosslinking monomer;
- and
- (b) polymerizing the polymerizable solution to irreversibly bond a copolymer onto the first substrate forming a core, wherein the core comprises acidic functional groups, and
- wherein at least 50% of the acidic functional groups in the core are neutralized with salt forming cations.
3 more elements
Dependencies are inferred from the claim text.