Method for improving creep performance in elastic applications
US11338565B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2017 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | May 4, 2037 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09J2423/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method and system of using a polyolefin-based, hot melt adhesive improves creep performance of elastic strands adhered to another substrate. Some deflection, greater than 1°, of the exit angle formed by a line normal to the axis of a neutrally-positioned applicator and the elastic strand extending from the applicator is introduced. Preferably, deflection of the entrance angle is also introduced and a head tilt angle is also provided. The use of deflection improves creep performance or allows for a reduced amount of adhesive to be used to achieve the same or similar creep performance. The elastic strands may be used to form a leg cuff in personal care products, such as diapers, and the substrate to which they are applied could be a polyethylene film or non-woven materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.