Patent No. EP4234240 (titled "High Performance Fibers Composite Sheet") was filed by Avient Protective Materials on Dec 17, 2018. The application was issued on Jan 29, 2025.
Composite sheet for ballistic protection comprising high tenacity polyethylene fibers and a functionalized polyethylene resin, wherein the fibers have a tenacity of at least 1.5 N/tex and the resin is a copolymer of ethylene with at least one unsaturated carboxylic acid comonomer, preferably acrylic acid or methacrylic acid, with at least 90 mol% of ethylene-derived monomeric units. The composite sheet exhibits improved bias extension shear properties, enabling the production of high-quality compression-molded ballistic articles with enhanced thermal stability and reduced manufacturing defects.

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