Methods of making floor tile and wall covering from extruded hot recycled vinyl thermoplastic membrane having discrete fibers randomly dispersed therein
US5560797A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 1995 |
| Grant date | Oct 1, 1996 |
| Priority date | — |
| Expiry date | May 19, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/913
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of continuously fabricating a cushiony recycled plastic floor tile or wall cover wherein a single-ply sheet, made up substantially of recycled membrane and a proportion of discrete fibers sufficient to create a cushion effect in the tile, is extruded. The fibers are reduced in length by cooling the sheet extrudate produced, chopping the sheet extrudate into particles in which the fibers are reduced in length and then passing the chopped extrudate into the extruder to reextrude it. When size reduction is achieved, the hot substrate proceeds immediately into the nip between laminating rolls and a preheated cover film selected from the group comprising transparent sheet, colored sheet, and sheet with decorative imprinting is passed on into the nip with the substrate. Compressive pressure is applied by the laminating rolls to autogeneously heat weld the substrate and cover film in surface to surface sealed contact without the imposition of air bubbles or wrinkles between them. The welded product is then cooled and cut into discrete sizes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.