Multiple calender process for forming non-fibrous high modulus ultra high molecular weight polyethylene tape
US7740779B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2007 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Jan 26, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2223/0683
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multi-calender process for forming a high modulus, high strength component for use in ballistic-resistant articles. The process includes forming ultrahigh molecular weight polyethylene powder into a uniform sheet at a low pressure. Multiple calender units mold and draw the uniform sheet into a non-fibrous, monolithic, ultra high molecular weight polyethylene tape. The multi-calender process and subsequent draw stages stretch the non-fibrous UHMWPE tape to a total draw of at least 100 to 1 to produce a high modulus, high strength UHMWPE component with a modulus of 1,400 grams per denier or greater. The multi-calender process of the present invention enables production of a high-strength, high-modulus UHMWPE component for ballistic-resistant articles and other applications at significantly higher rates and at a lower unit cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.