Method of manufacturing soundproof material
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United States of America Patent
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Oct 15, 2024
Grant Date -
Jun 8, 2023
app pub date -
Nov 30, 2022
filing date -
Dec 2, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A soundproof material includes rubber sponge having a specific gravity of 0.2 or less, which is formed by extrusion molding and a subsequent crosslinking and foaming of a rubber composition using a microwave heating device. The rubber composition includes at least raw material rubber, a crosslinking agent, a foaming agent, and carbon black. The soundproof material has a rectangular cross-sectional outer shape, has at least two hollow parts inside formed by a lateral partition wall extending in a left-right lateral direction and at least two hollow parts formed by a vertical partition wall extending in a vertical direction. The method includes adding carbon nanotubes to the rubber composition.
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