Dual adhesive application for laminating elastic webs
US6491776B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 2001 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Apr 23, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2555/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention provides a method of making a laminated, gathered, elastic web. The method includes the steps of feeding a first substrate in a machine direction, feeding a second substrate aligned with the first substrate in the machine direction, and feeding an array of elastomeric strand material between the first and second substrates in such a manner that the elastomeric strand material is stretched in the machine direction and aligned with the first and second substrates. A hot melt pressure sensitive adhesive, such as a styrene-isoprene-styrene based adhesive, is applied to one substrate, and a curable adhesive, such as a polyurethane based adhesive, is applied to the other substrate. Thereafter, the two substrates and the elastomeric strand material are compressed to form a laminate elastic web while maintaining the elastomeric strand material in its stretched state. Machine direction tension is maintained on the laminate until the hot melt adhesive cools and bonds the layers together. Thereafter, the machine direction tension is released to permit the elastic web to contract to form a gathered elastic web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.