Stretch laminate
US11446916B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2019 |
| Grant date | Sep 20, 2022 |
| Priority date | — |
| Expiry date | Dec 27, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2555/02
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method to manufacture an elastic laminate is disclosed. Thermoplastic Elastomeric Material (TEM) is selected from a polymer supply and fed into an extruder. The TEM film is extruded by the extruder by passing the TEM polymer through an extrusion die head to form a TEM film layer on a carrier web provided by a carrier supply. The TEM film layer is allowed to solidify on the carrier web, thereby forming a first laminate. The first laminate is stored in a first storage prior to being delivered to a delamination unit, which delaminates the first laminate by separating the TEM layer from the carrier web. The delaminated TEM layer is stretched at least in its Machine Direction (MD) in a stretching station via a plurality of web guide means. The stretched TEM layer is positioned between a first envelope web and optionally a second envelope web prior to being delivered to a bonding unit, which connects them to form a second bonded laminate. The second bonded laminate is unstretched and stored in a second storage for a predetermined time. The stored second bonded laminate is wound under controlled tension to form a roll or spool, thereby forming the elastic laminate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.