Manufacture of elongated extruded cross-linked products
US4595546A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1983 |
| Grant date | Jun 17, 1986 |
| Priority date | — |
| Expiry date | Nov 14, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S528/901
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for the manufacture of a cross-linked extruded elongated product from polyethylene or other suitable polymer. The polymer is fed into the hopper of a screw extrusion machine. The polymer is heated and melted while being conveyed through the barrel of the screw extruder. A liquid silane compound which comprises a modified vinyl functional silane, a free-radical generator, and a condensation catalyst is carefully metered and injected into the melted polymer. The melted polymer and the liquid silane compound are then mixed and blended to obtain a uniform blended mixture thereof. The blended mixture is then extruded through an extrusion die to form an elongated product of a required final shape and the elongated product is then subjected to the action of moisture and heat until the polymer in the elongated product is cross-linked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.