Composition of tanning agent containing modified tara mimosa extract, and bating method without chrome

A technology of Tara tannin extract and composition, which is applied in the application field of forestry products in tanning engineering, can solve the problems of not being suitable for sofa leather, high tanning agent price, and large elongation rate of finished leather, etc., and achieve shallow The effect of color, light color, and fine grain

A technology of Tara tannin extract and composition, which is applied in the application field of forestry products in tanning engineering, can solve the problems of not being suitable for sofa leather, high tanning agent price, and large elongation rate of finished leather, etc., and achieve shallow The effect of color, light color, and fine grain

CN1760377AInactive Publication Date: 2006-04-19SICHUAN UNIV
0 Cites 10 Cited by

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Pickling cowhide (section thickness 1.8mm), 100kg in the pickling solution, the liquid ratio is 50kg, add 3kg of basic aluminum chloride, turn for 2 hours, adjust the pH to 5.0-5.2 with sodium thiosulfate or baking soda, Add 10kg of Tara extract, rotate for 6 hours (speed 4rpm), add 10kg of Tara extract, rotate for 8 hours, stop the drum overnight, rotate for 1 hour the next day, take out the drum and let it stand for 2 days.

[0043] Rinse: 150ωt% water, 0.8ωt% sulfuric acid (1:20 times dilution), turn for 40 minutes (8~10rpm).

[0044] Fatliquoring: add mixed sulfated castor oil 3ωt% and TRUPON SR 4ωt%, turn on for 90-120 minutes, add 0.5ωt% rare earth salt, turn on for 30 minutes.

[0045] Washing: 200% water, turn for 30 minutes.

[0046] Dry and finish.

[0047] The grain surface of the finished leather is fine and firm, with good fullness and softness, and its Ts can reach above 90°C.

Embodiment 2

[0049] Pickling pigskin (thickness of split layer: 1.8-2.0mm), 100kg in pickling solution, deacidification with sodium thiosulfate, adjust pH to 5.2-5.4, add 3ωt% NF syntan, turn for 1 hour, add tower Pull 10kg of tannin extract, turn it for 6 hours (the speed is 4rpm), add 14kg of Tara tannin extract, turn it for 6-8 hours, add 1kg of titanium sulfate tanning agent, turn it for 2 hours, take it out of the drum and let it stand for more than 2 days

[0050] Fatliquor: 150kg of water, 35°C, CNS synthetic fatliquor 4ωt%, L-3 fatliquor 3ωt%.

[0051] Fixation: 1kg of formic acid, after dilution, add in three times, the total time is 60 minutes.

[0052] Drying and finishing.

[0053] The finished leather is tight, plump and light in color, with a Ts of 89°C.

Embodiment 3

[0055] 100kg of softened goatskin, without pickling, pH 6.5-8.0, liquid ratio 100kg, add 10kg of zinc sulfate, turn for 1-2 hours, add 15kg of Tara tannin extract, turn for 5-10 hours, take it out of the drum and let it stand .

[0056] Rinse: adjust the pH to about 4.0 with sulfuric acid 1ωt%.

[0057] Fatliquoring: use CNS synthetic fatliquoring agent 1ωt%, OS fish oil fatliquoring agent 3ωt%, TRUPON EIR 3ωt% fatliquoring, finishing.

[0058] The finished leather is soft and plump, with a shrinkage temperature of 80-85°C.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
temperatureaaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

Abstract

A tanning agent containing modified Tara tannin extract contains proportionally modified Tara tannin extract, non-Cr metal salt and organic phosphorus salt. Its tanning method features that the bare leather must be immersed in acid before tanned.

Description

1. Technical field [0001] The invention relates to a modified Tara extract composition tanning agent and a chrome-free tanning method thereof, belonging to the application of forestry products in leather-making engineering. 2. Background technology [0002] Since it was discovered that chromium salt has excellent tanning performance, chromium salt tanned leather has high moisture and heat resistance stability, good softness and fullness, and good water resistance, chemical resistance and microbial action performance, and has been Occupy a dominant position, so far, also fail to find the effective substitute product of chrome tanning agent. However, the harm of chromium to the environment, humans and animals has already attracted people's great attention, such as the chromium content in tannery wastewater and hexavalent chromium in finished leather. On the one hand, the traditional chrome tanning method has a low chromium absorption utilization rate, generally 60% to 80%, an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
19 Apr 2006
Publication
CN1760377A
IPC
C14C3/08
Inventors
张宗才; 戴红