Leather tanning method using chrome-free and formaldehyde-free adhesive
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United States of America Patent
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Aug 22, 2023
Grant Date -
Oct 20, 2022
app pub date -
Jan 9, 2022
filing date -
Apr 19, 2021
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Abstract
A leather tanning method using chrome-free and formaldehyde-free adhesive pertains to the technical field of leather tanning, in which the quaternary ammonium salt cationic resin adhesive is used for leather pretanning and retanning. After drying, the leather has excellent performance, which is comparable to traditional chrome and formaldehyde tanned leather. The method solves the drawbacks of using chromium and formaldehyde tanning agents in the leather tanning industry, which pollutes the environment and raises health concerns. The present disclosure has obvious advantages in environmental protection, huge industrial application value, and has broad application prospects.
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