Mizuno. has filed a patent for a resin composition that can be cross-linked and foamed. The composition includes a thermoplastic resin, a cross-linking agent, and a foaming agent, with the addition of ethylene propylene diene monomer rubber. The rubber must have an ethylene content lower than 70% and account for at least 5% of the total mass of the resin and rubber. GlobalData’s report on Mizuno gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Mizuno, Sport rackets was a key innovation area identified from patents. Mizuno's grant share as of September 2023 was 31%. Grant share is based on the ratio of number of grants to total number of patents.
A recently filed patent (Publication Number: US20230295408A1) describes a resin composition that can be cross-linked and foamed. The composition includes a thermoplastic resin, a cross-linking agent, and a foaming agent. Additionally, the composition contains ethylene propylene diene monomer rubber (EPDM) with an ethylene content lower than 70 mass %. The EPDM rubber makes up at least 5 mass % of the total composition.
The patent also specifies that the hardness of the base composition, which consists of the thermoplastic resin and EPDM rubber, should be 86 or less. The hardness is determined using a specific equation provided in the patent. The thermoplastic resin used in the composition can be a-olefin copolymers, a-olefin block copolymers, or ethylene-vinyl acetate copolymers.
The amount of EPDM rubber in the composition should not exceed 30 mass % of the total composition. Additionally, the composition may include a fatty acid and a fatty acid ester.
The patent claims that the resin composition can be used to create a cross-linked foam. This foam has a specific gravity of 0.6 g/cm3 or less. Furthermore, the patent specifically mentions that this cross-linked foam is suitable for use in a shoe midsole.
In summary, the patent describes a resin composition that can be cross-linked and foamed. It includes a thermoplastic resin, a cross-linking agent, and a foaming agent. The composition also contains EPDM rubber with a specific ethylene content. The resulting cross-linked foam has a specific gravity of 0.6 g/cm3 or less and is intended for use in shoe midsoles.
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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.
GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
