Methods for using hot melt adhesives based on a blend of propylene polymers made using single-site catalysts
US10214665B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2018 |
| Grant date | Feb 26, 2019 |
| Priority date | — |
| Expiry date | Apr 20, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/06
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for making a laminate comprises the steps of applying a hot melt adhesive composition in a molten state to a primary substrate and mating a secondary substrate to the first substrate by contacting the secondary substrate with the adhesive composition. The composition comprises a polymer blend based on a low molecular weight semicrystalline propylene based polymer and a high molecular weight essentially amorphous propylene based polymer, both of which are prepared by using single-site catalysts. The composition further contains a compatible tackifier, a plasticizer, an antioxidant, and optionally a wax, a filler, a colorant, a UV absorber, another polymer, or combinations thereof. Particularly preferred applications include nonwoven disposable diaper and feminine sanitary napkin construction, diaper and adult incontinent brief elastic attachment, diaper and napkin core stabilization, diaper backsheet lamination, industrial filter material conversion, and surgical gown and surgical drape assemblies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.