Tackifier-free hot melt adhesive compositions suitable for use in a disposable hygiene article
US12247142B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jul 10, 2020 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Jun 15, 2041 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F2013/53958
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A hot melt adhesive composition comprises a polypropylene homopolymer having a DSC melting point of less than 100° C.; a butene-based copolymer; and a plasticizer. The butene-based copolymer may comprise a butene-rich amorphous poly-alpha olefin, such as a butene-propylene copolymer, or a semi-crystalline copolymer, such as a butene-ethylene copolymer. The hot melt adhesive is especially useful for bonding substrates which swell or elongate significantly in use. Such uses include adhering superabsorbent polymers to a substrate or adhering together two substrates at least one of which having superabsorbent polymers, such as the top and bottom layer of an absorbent core of a disposable hygiene article, such as a diaper, feminine sanitary napkin, and adult incontinence pad. The hot melt adhesive composition, which does not contain a tackifier, demonstrates suitable elongation at break and stress at yield, with a sufficiently low viscosity, to stabilize an absorbent core having superabsorbent polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.