Jul 22, 2025

US12365771 - High performance fibres composite sheet

The invention relates to a method for manufacturing a composite sheet comprising high performance polyethylene fibres and a polymeric resin comprising the steps of assembling HPPE fibres to a sheet, applying an aqueous suspension of a polymeric resin to the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature and/or a pressure treatment to the composite sheet wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to composite sheets obtainable by said method and articles comprising the composite sheet such as helmets, radomes or a tarpaulins.

Assignee: AVIENT PROTECTIVE MATERIALS B.V.
Inventors: Roelof Marissen, Johannes Wilms, Leonard Nielaba
Filing date: 2021-09-21

The patent describes a method for creating a composite sheet made from high performance polyethylene (HPPE) fibers and a functionalized polymeric resin, which can be used in various applications such as helmets and tarpaulins. The composite features specific properties, including a tenacity of at least 1.0 N/tex for the HPPE fibers and defined density and thermal characteristics for the resin.

Claim 1

A composite sheet comprising assembled high performance polyethylene (HPPE) fibres and a polymeric resin, wherein the HPPE fibers have a tenacity of at least 1.0 N/tex, and wherein the polymeric resin comprises a functionalized polymer which is a copolymer of ethylene and/or propylene with an ethylenically unsaturated monomer comprising a carboxylic acid group or derivative thereof, and wherein the polymeric resin has a density as measured according to ISO1183 in the range from 860 to 930 kg/m 3 , a melting temperature in the range from 40 to 140° C. and a heat of fusion of at least 5 J/g. the HPPE fibers have a tenacity of at least 1.0 N/tex, and wherein the polymeric resin comprises a functionalized polymer which is a copolymer of ethylene and/or propylene with an ethylenically unsaturated monomer comprising a carboxylic acid group or derivative thereof, and wherein the polymeric resin has a density as measured according to ISO1183 in the range from 860 to 930 kg/m 3 , a melting temperature in the range from 40 to 140° C. and a heat of fusion of at least 5 J/g.

Google Patents

https://patents.google.com/patent/US12365771

USPTO PDF

https://image-ppubs.uspto.gov/dirsearch-public/print/downloadPdf/12365771