Method of forming an elastic laminate
US9199410B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2011 |
| Grant date | Dec 1, 2015 |
| Priority date | — |
| Expiry date | Jun 30, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2555/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming an elastic laminate including at least one elastic film and least two nonwoven webs laminated to each of the sides of the elastic film. The elastic film is fed in a machine direction towards a bonding station. The elastic film is stretched in the machine direction at a stretch ratio from 1.5 to 8 times of its original length, thereby forming a stretched film and the stretched film and said at least two nonwoven webs are laminated in the bonding station. The elastic film is stretched in at least two stretching steps before laminating it with the at least two nonwoven webs, wherein between 5 and 25% of the total stretching occurs in the last stretching step before lamination in the bonding station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.