Sinopec has been granted an invention patent: “Thermally conductive high-strength polypropylene composite sheet and its fabric, polypropylene composite materials, as well as their manufacturing methods and applications””

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According to data from the Tianyancha app, Sinopec (600028) has obtained a new invention patent grant. The title of the patent is “Thermally conductive high-strength polypropylene composite sheet and its fabric, polypropylene composite materials, as well as their manufacturing methods and applications”. The patent application number is CN202310485612.3, and the grant date is November 11, 2025. Patent abstract: This invention relates to the field of polypropylene materials, and discloses a thermally conductive polypropylene sheet, a thermally conductive polypropylene fabric, a high-strength thermally conductive polypropylene composite material, as well as their preparation methods and applications. This thermally conductive polypropylene sheet consists of film layer A containing polypropylene composition A, and film layer B containing polypropylene composition B; the film layer B on either side of film layer A can be the same or different ； The thermally conductive polypropylene sheet has a BAB layered structure, with film layer B located on both sides of film layer A ； Among them, polypropylene composition A includes homopolypropylene a, impact-resistant copolypropylene b, and composite thermal conductive filler c ； The polypropylene compositions B each comprise random copolymerized polypropylene x, heat-adhesion enhancer y, and composite thermal conductive filler z. The polypropylene composite obtained by hot-pressing this thermally conductive polypropylene sheet exhibits excellent tensile properties, impact resistance, and thermal conductivity, while also maintaining good interlayer adhesion even when fabricated at lower hot-pressing temperatures.