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EP0116845A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Consolidation of polyethylene fibrous networks

Assignee: Honeywell International Inc
•
Filing: 1984-01-14
•
Granted: —
•
Expires: 2004-01-14
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Abstract

Abstract High performance (high tenacity and modulus) polyethylene fibers are subjected to pressure at elevated temperatures in the absence of a matrix to form articles such as non-woven fabrics and film-like structures, which may be translucent or even transparent. Good fiber adhesion and even fiber deformation to produce a substantially void-free article are achieved, even when molding temperatures are below the approximately 138°C melting temperature of the precursor UHMW polyethylene. Fiber physical properties, and especially high tenacities, are retained even when temperatures exceed 138°C, such as at 140°C, 150°C or 155°C molding temperature.

Inventors

  • 👤 Gary A. Harpell
  • 👤 Sheldon Kavesh
  • 👤 Igor Palley
  • 👤 Dusan C. Prevorsek

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-01 04:39
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; B; B29; B29C; B29C43/00; B29C43/006; B29C67/00; B29C67/24; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2023/0658; B29K2023/0683; B29K2105/00; B29K2105/06; B29K2105/25; B29K2995/00; B29K2995/0018; B29K2995/0026; B29K2995/0029

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 68 words
A process for the production of polyethylene articles which comprises applying pressure to a network of fibers consisting essentially of polyethylene having a weight average molecular weight at least 500,000, said fibers having a tenacity at least 20 g/denier and tensile modulus at least 500 g/denier, at a temperature of 100°C to 160°C, and at a pressure and for a time sufficient to cause adjacent fibers to adhere.
Claim 2
Dependent Claim 68 words
A process for the production of polyethylene articles which comprises applying pressure to a network of fibers consisting essentially of polyethylene having a weight average molecular weight at least 500,000, said fibers having a tenacity at least 20 g/denier and tensile modulus at least 500 g/denier, at a temperature of 100°C to 160°C, and at a pressure and for a time sufficient to cause adjacent fibers to adhere.
Claim 3
Dependent Claim 20 words
The process of claim 1 wherein the pressure and time are sufficient to deform the fibers and substantially eliminate voids.
Claim 4
Dependent Claim 21 words
The process of claim 2 wherein the pressure and time are sufficient to form a translucent article substantially free of voids.
Claim 5
Dependent Claim 36 words
The process of any previous claim wherein the polyethylene has a weight average molecular weight at least 1,000,000, and the fibers have a tenacity at least 30 g/denier and a tensile modulus at least 1000 g/denier.
Claim 6
Dependent Claim 13 words
The process of any previous claim wherein the temperature is 110°C to 155°C.
Claim 7
Dependent Claim 13 words
The process of any previous claim wherein the temperature is 140°C to 155°C.
Claim 8
Dependent Claim 13 words
The process of any previous claim wherein the network is a woven fabric.
Claim 9
Dependent Claim 11 words
A polyethylene article prepared by the process of any previous claim.
Claim 10
Dependent Claim 10 words
The polyethylene article of claim 8 being a flexible film.

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