Chrome-free tanning process of ecological leather

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United States of America

PATENT NO 12129524
APP PUB NO 20240263257A1
SERIAL NO

18681096

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Abstract

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A chrome-free tanning process of an ecological leather is characterized by a TWS+sodium lignosulfonate+TWLZ ternary tanning process system. The sodium lignosulfonate added can not only have a fixation effect on a TWS tanning agent to make the TWS tanning not undergo detanning at a low pH, but also significantly improve the uniformity of distribution of a TWLZ tanning agent in a hide/skin and promote the formation of a stable cross-linked network structure by the TWLZ tanning agent in a collagen fiber, which effectively overcomes the defects of tanning performance of the existing tanning systems to obtain a leather with uniform and sufficient tanning, a high isoelectric point, a strong electropositivity, excellent absorption for post-tanning chemicals, and a prominent softness, and gives a leather a wide use range and a high quality.

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Patent Owner(s)

Patent OwnerAddress
SICHUAN UNIVERSITY610065 NO 24 SOUTH SECTION OF RING ROAD SICHUAN CHENGDU CHENGDU CITY SICHUAN PROVINCE 610065

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shi, Bi Chengdu, CN 9 9
Wang, Yanan Chengdu, CN 52 37
Yu, Yue Chengdu, CN 280 2832
Zeng, Yunhang Chengdu, CN 2 0
Zhang, Wenhua Chengdu, CN 76 2386
Zhou, Jianfei Chengdu, CN 6 0

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