CN118272588A - Dye-free wet dyeing and finishing method for leather - Google Patents
Dye-free wet dyeing and finishing method for leather Download PDFInfo
- Publication number
- CN118272588A CN118272588A CN202410681019.0A CN202410681019A CN118272588A CN 118272588 A CN118272588 A CN 118272588A CN 202410681019 A CN202410681019 A CN 202410681019A CN 118272588 A CN118272588 A CN 118272588A
- Authority
- CN
- China
- Prior art keywords
- rotating
- extract
- dyeing
- leather
- tannin extract
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010985 leather Substances 0.000 title claims abstract description 47
- 238000004043 dyeing Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000000284 extract Substances 0.000 claims abstract description 68
- 235000018553 tannin Nutrition 0.000 claims abstract description 44
- 229920001864 tannin Polymers 0.000 claims abstract description 44
- 239000001648 tannin Substances 0.000 claims abstract description 44
- PFTAWBLQPZVEMU-DZGCQCFKSA-N (+)-catechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-DZGCQCFKSA-N 0.000 claims abstract description 17
- 235000018167 Reynoutria japonica Nutrition 0.000 claims abstract description 15
- 235000005487 catechin Nutrition 0.000 claims abstract description 14
- ADRVNXBAWSRFAJ-UHFFFAOYSA-N catechin Natural products OC1Cc2cc(O)cc(O)c2OC1c3ccc(O)c(O)c3 ADRVNXBAWSRFAJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229950001002 cianidanol Drugs 0.000 claims abstract description 14
- 240000003152 Rhus chinensis Species 0.000 claims abstract description 11
- 235000014220 Rhus chinensis Nutrition 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 10
- 238000005238 degreasing Methods 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims abstract description 5
- 230000003472 neutralizing effect Effects 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 240000001341 Reynoutria japonica Species 0.000 claims description 14
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 10
- 229920000178 Acrylic resin Polymers 0.000 claims description 10
- 235000019253 formic acid Nutrition 0.000 claims description 10
- 229920003180 amino resin Polymers 0.000 claims description 7
- 238000005429 filling process Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 244000080767 Areca catechu Species 0.000 claims description 3
- 235000006226 Areca catechu Nutrition 0.000 claims description 3
- 239000010302 Pterocarpus santalinus extract Substances 0.000 claims description 3
- 244000153955 Reynoutria sachalinensis Species 0.000 claims description 3
- 235000003202 Reynoutria sachalinensis Nutrition 0.000 claims description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims 1
- 241000196324 Embryophyta Species 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 241001648835 Polygonum cuspidatum Species 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 239000000975 dye Substances 0.000 description 16
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 12
- 239000000126 substance Substances 0.000 description 12
- 229910052742 iron Inorganic materials 0.000 description 7
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 6
- 235000017557 sodium bicarbonate Nutrition 0.000 description 6
- 239000004280 Sodium formate Substances 0.000 description 5
- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 5
- 235000019254 sodium formate Nutrition 0.000 description 5
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- 239000000987 azo dye Substances 0.000 description 4
- 230000000711 cancerogenic effect Effects 0.000 description 4
- 231100000315 carcinogenic Toxicity 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- -1 and meanwhile Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000009931 harmful effect Effects 0.000 description 3
- 102000008186 Collagen Human genes 0.000 description 2
- 108010035532 Collagen Proteins 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000000980 acid dye Substances 0.000 description 2
- 125000000751 azo group Chemical group [*]N=N[*] 0.000 description 2
- 229920001436 collagen Polymers 0.000 description 2
- 239000000982 direct dye Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000000543 intermediate Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 150000003904 phospholipids Chemical class 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000732800 Cymbidium Species 0.000 description 1
- SJEYSFABYSGQBG-UHFFFAOYSA-M Patent blue Chemical compound [Na+].C1=CC(N(CC)CC)=CC=C1C(C=1C(=CC(=CC=1)S([O-])(=O)=O)S([O-])(=O)=O)=C1C=CC(=[N+](CC)CC)C=C1 SJEYSFABYSGQBG-UHFFFAOYSA-M 0.000 description 1
- PJANXHGTPQOBST-VAWYXSNFSA-N Stilbene Natural products C=1C=CC=CC=1/C=C/C1=CC=CC=C1 PJANXHGTPQOBST-VAWYXSNFSA-N 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 150000004982 aromatic amines Chemical class 0.000 description 1
- 150000001491 aromatic compounds Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000006267 biphenyl group Chemical group 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical class C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 229930003935 flavonoid Natural products 0.000 description 1
- 235000017173 flavonoids Nutrition 0.000 description 1
- 150000002215 flavonoids Chemical class 0.000 description 1
- 125000001841 imino group Chemical group [H]N=* 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000001005 nitro dye Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- PJANXHGTPQOBST-UHFFFAOYSA-N stilbene Chemical compound C=1C=CC=CC=1C=CC1=CC=CC=C1 PJANXHGTPQOBST-UHFFFAOYSA-N 0.000 description 1
- 235000021286 stilbenes Nutrition 0.000 description 1
- 239000000979 synthetic dye Substances 0.000 description 1
- 231100000378 teratogenic Toxicity 0.000 description 1
- 230000003390 teratogenic effect Effects 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to the technical field of leather production, and provides a dye-free wet dyeing and finishing method for leather. The method sequentially comprises the following steps: squeezing, shaving, weighing, drum casting, degreasing, washing 1, retanning, neutralizing, filling, fatting and washing 2, and filling and dyeing by using plant tannin extracts such as catechin tannin extract, polygonum cuspidatum tannin extract, huang Tanguo tannin extract, chinese gall tannin extract and the like. The method does not use dye to carry out wet dyeing and finishing, is safe and environment-friendly, and the obtained leather has high color fastness.
Description
Technical Field
The invention relates to the technical field of leather production, in particular to a dye-free wet dyeing and finishing method for leather.
Background
Dyes commonly used in tanning are mainly acid dyes and direct dyes. The acid dye is mainly distinguished from an aromatic methane dye, an imino dye, a cymbidium dye, an azo dye, a nitrodye and the like in terms of chemical structure, and the direct dye is mainly distinguished from an azo dye, a stilbene dye and the like in terms of chemical structure. Many intermediates and components of dyes contain sensitized and cancerogenic chemical substances, which have great harm to human bodies. Many synthetic dyes in the market today are based on azo structures. Under the general condition, azo dye can not have harmful effect on human body, but partial azo dye synthesized by using cancerogenic aromatic amine intermediates can be combined with substances released in the normal metabolism process of human body after contacting with human skin for a long time, and generate a reduction reaction to break azo groups, regenerate cancerogenic aromatic compounds and endanger human health. In addition, the dyes can also have the problems that the heavy metals such as lead, antimony, chromium, cobalt, copper, nickel, mercury and the like exceed limit indexes and formaldehyde exceeds standards, so that the human health is influenced.
With the existing detection means, leather enterprises cannot detect all harmful substances in limited quantity for each batch of purchased dye, so that the condition that the limited substances of leather products exceed the standard due to the fact that the limited substances of the dye exceed the standard is likely to occur.
On the other hand, the dyeing wastewater has complex components and large variation, may contain cancerogenic and teratogenic organic compounds, toxic heavy metals and the like, is difficult to treat and has high treatment cost.
Disclosure of Invention
Therefore, in order to solve the above-mentioned problems, the present invention provides a dye-free wet dyeing and finishing method for leather. According to the dye-free wet dyeing and finishing method, the tannin extract is used for dyeing the leather under the condition that the dye is not used, so that the influence of harmful substances in the dye on a human body can be avoided, and the treatment cost of wet dyeing and finishing wastewater of the leather can be reduced.
The invention realizes the above purpose through the following technical scheme:
a dye-free wet dyeing and finishing method for leather comprises the following steps:
and (3) squeezing, shaving, weighing, drum throwing, degreasing, washing 1, retanning, neutralizing, filling, fatting and washing 2 the tanned crust leather, wherein the filling is carried out without using dye, and filling dyeing is carried out by using one or more of catechu tannin extract, giant knotweed tannin extract, huang Tanguo tannin extract and Chinese gall tannin extract.
By using specific tannin extracts to carry out filling dyeing, dyes are not used, the ecological environment friendliness of the product is improved, and the environmental pollution is reduced.
Preferably, the filling process uses one or more of the pterocarpus santalinus extract and the gallnut extract for filling and dyeing, and uses the iron-containing metal tanning agent for fixation.
Huang Tanguo tannin extract and Chinese gall tannin extract can react with leather collagen fiber under a certain temperature and aerobic environment to dye leather into black, and meanwhile, the fixation of anion retanning filling materials can be improved by fixing the cation iron-containing metal tanning agent, and meanwhile, tannin in the tannin extract can react with iron ions to generate black substances.
Preferably, the filling process uses catechin extract and polygonum cuspidatum extract for filling and dyeing.
The catechin and polygonum cuspidatum extracts contain rich pigments, so that the leather can be dyed brown, and the color of the leather can be adjusted by changing the proportion of the catechin extract and the polygonum cuspidatum extract. The extract contains flavonoid substances, anthraquinone substances and other antibacterial components, and can endow leather with good antibacterial property.
Preferably, the specific steps of the filling procedure are as follows: adding water with the weight of 30-100% into a rotary drum, controlling the temperature in the drum to be 25-40 ℃, adding 2-8% of acrylic resin retanning agent, rotating for 20-90min, adding 3-10% of amino resin retanning agent, rotating for 20-60min, adding 0.5-3% of synthetic tanning agent, 2-10% of Huang Tanguo tannin extract, 1-5% of Chinese gall tannin extract, rotating for 20-90min, adding 0.5-3% of synthetic tanning agent, 2-10% of Huang Tanguo tannin extract, 1-5% of Chinese gall tannin extract, rotating for 30-120min, adding 100-300 water, controlling the temperature to be 45-55 ℃, adding 1-3% of formic acid, adding into the rotary drum for 1-3 times, rotating for 10-40min each time, adding 1-5% of iron metal tanning agent, rotating for 20-60min, and draining.
Preferably, the specific steps of the filling procedure are as follows: adding water with the weight of 30-100% into a rotary drum, controlling the temperature in the drum to be 25-40 ℃, adding 2-8% of acrylic resin retanning agent, rotating for 20-90min, adding 3-10% of amino resin retanning agent, rotating for 20-60min, adding 0.5-3% of synthetic tanning agent, 1-6% of catechin extract, 1-6% of polygonum cuspidatum extract, rotating for 20-90min, adding 0.5-3% of synthetic tanning agent, 1-6% of catechin extract, 1-6% of polygonum cuspidatum extract, rotating for 30-120min, adding 100-300 of water, controlling the temperature to be 45-55 ℃, adding 1-3% of formic acid, adding into the rotary drum for 1-3 times, rotating for 10-40min each time, and draining water.
By adopting the technical scheme, the dye-free wet dyeing and finishing method for the leather has the following advantages compared with the prior art:
1. Huang Tanguo tannin extract and Chinese gall tannin extract can react with leather collagen fibers to dye leather into black, and the tannin extract can be tightly combined with the leather fibers to improve the dyeing fastness of the leather. The tannin in the tannin extract can react with iron ions to generate black substances, and the tannin extract and the iron-containing metal tanning agent are used for retanning and filling together, so that the binding rate and binding fastness of anionic materials such as the tannin extract, acrylic resin, amino resin and the like can be improved, color reaction can be generated, and the blackness of leather can be improved.
2. The catechin and polygonum cuspidatum extracts are matched for filling and dyeing, and rich pigments are contained in the catechin and polygonum cuspidatum extracts, so that leather can be dyed brown, and the color of the leather can be adjusted through the ratio change of the catechin and polygonum cuspidatum extracts. Meanwhile, the giant knotweed tannin extract contains a plurality of antibacterial components, so that the antibacterial property of leather can be improved.
3. The leather prepared by the invention is dyed without dye, and the tannin extract extracted from natural plants is dyed, so that the leather has a dyeing effect, can play a role in tanning, is safe and environment-friendly, and has high binding fastness of the tannin extract, the tannin extract and leather fibers, so that the leather has high color fastness.
Detailed Description
The following describes embodiments of the present invention in detail with reference to specific examples, so as to solve the technical problem by applying the technical means to the present invention, and the implementation process for achieving the technical effect can be fully understood and implemented accordingly. Unless otherwise indicated, the technical means employed in the examples are conventional means well known to those skilled in the art, and the reagents and products employed are also commercially available. Various processes and methods not described in detail are conventional methods well known in the art.
The following examples of the present invention are provided to aid in a further understanding of the present invention, but the scope of the present invention is not limited to these examples.
Example 1
A dye-free wet dyeing and finishing method for black leather comprises the following steps:
step one, taking tanned crust leather, squeezing water, shaving, weighing, drum throwing, degreasing and washing 1.
Adding water with the weight of 100% into the rotary drum, controlling the temperature in the drum to be 25 ℃, adding 3% of chrome tanning agent, rotating for 30min, adding 1% of sodium formate, 0.5% of baking soda, rotating for 180min, adding 2% of acrylic resin retanning agent, rotating for 20min, standing for 2h, rotating for 10min, and draining.
Thirdly, adding 150% of water with the weight of the leather into a rotary drum, controlling the temperature in the drum to be 30 ℃, adding 1.5% of neutralized tannin, 2% of sodium formate, rotating for 30min, adding 0.5% of baking soda, rotating for 60min, and draining.
Adding 50% of water by weight into a rotary drum, controlling the temperature in the drum to be 30 ℃, adding 6% of acrylic resin retanning agent, rotating for 40min, adding 6% of amino resin retanning agent, rotating for 40min, adding 2% of synthetic tanning agent, 6% Huang Tanguo of tannin extract, 1% of Chinese gall tannin extract, rotating for 60min, adding 1% of synthetic tanning agent, 6% Huang Tanguo of tannin extract, 1% of Chinese gall tannin extract, rotating for 90min, adding 200% of water, controlling the temperature to be 50 ℃, adding 0.8% of formic acid, rotating for 20min, adding 3% of iron-containing metal tanning agent, rotating for 40min, and draining.
Fifthly, adding 250% of water with the weight of the leather into a rotary drum, controlling the temperature in the drum to be 50 ℃, adding 5% of phospholipid fatliquor, adding 2% of synthetic fatliquor, 0.5% of surfactant, rotating for 60min, adding 1% of formic acid, rotating for 20min, and draining.
Step six, washing 2, discharging, lapping and standing.
Example 2
A dye-free wet dyeing and finishing method for brown leather comprises the following steps:
step one, taking tanned crust leather, squeezing water, shaving, weighing, drum throwing, degreasing and washing 1.
Adding 200% of water by weight into a rotary drum, controlling the temperature in the drum to be 40 ℃, adding 1.5% of sodium formate, 0.5% of baking soda, rotating for 60min, adding 4% of amphoteric acrylic resin retanning agent, rotating for 40min, adding 3% of synthetic tanning agent, rotating for 30min, adding 0.3% of formic acid, rotating for 20min, adding 1% of formic acid, rotating for 20min, adding 5% of chrome tanning agent, rotating for 60min, adding 2% of sodium formate, 0.8% of baking soda, rotating for 120min, adding 2% of acrylic resin retanning agent, rotating for 60min, standing for 12h, rotating for 30min, and draining.
Adding 200% of water with the weight of the leather into the rotary drum, controlling the temperature in the drum to be 35 ℃, adding 2.5% of neutralized tannin, 1% of sodium formate, rotating for 60min, adding 0.5% of baking soda, rotating for 30min, adding 0.5% of baking soda, rotating for 60min, and draining.
Adding 50% of water by weight into a rotary drum, controlling the temperature in the drum to be 30 ℃, adding 6% of acrylic resin retanning agent, rotating for 40min, adding 5% of amino resin retanning agent, rotating for 30min, adding 1% of synthetic tanning agent, 1% of catechin extract, 5% of polygonum cuspidatum extract, rotating for 60min, adding 2% of synthetic tanning agent, 1% of catechin extract, 5% of polygonum cuspidatum extract, rotating for 60min, adding 200% of water, controlling the temperature to be 50 ℃, adding 1% of formic acid, rotating for 20min, and draining.
Fifthly, adding 300% of water with the weight of the leather into a rotary drum, controlling the temperature in the drum to be 55 ℃, adding 3% of protein filler, rotating for 30min, adding 2% of phospholipid fatliquor, adding 4% of synthetic fatliquor, 3% of vegetable oil fatliquor, 0.2% of surfactant, rotating for 60min, adding 1% of formic acid, rotating for 20min, and draining.
Step six, washing 2, discharging, lapping and standing.
In conclusion, the dye-free wet dyeing and finishing method for the leather is free of dyeing, the leather is dyed black by using the pterocarpus santalinus extract, the gallnut extract and the iron-containing metal tanning agent in combination, the leather is dyed brown by using the catechin extract and the polygonum cuspidatum extract, and the obtained leather is safer and more environment-friendly. The tearing force of the leather is more than 40N, the friction color fastness/dry rubbing (2000 times) is more than 4/5 grade, the friction color fastness/wet (500 times) is more than 4/5 grade, the artificial light color fastness is more than 4 grade, the content of lead, mercury and cadmium is not detected (the detection limit is 2 mg/kg), and the content of polybrominated diphenyl and polybrominated diphenyl ether is not detected (the detection limit is 5 mg/kg).
The above description is illustrative of the embodiments using the present teachings, and is not intended to limit the scope of the present teachings to any particular modification or variation of the present teachings by those skilled in the art.
Claims (5)
1. The dye-free wet dyeing and finishing method for the leather is characterized by comprising the following steps of:
And (3) squeezing, shaving, weighing, drum throwing, degreasing, washing 1, retanning, neutralizing, filling, fatting and washing 2 the tanned crust leather, wherein the filling process does not use dye, and one or more of catechu tannin extract, polygonum cuspidatum tannin extract, huang Tanguo tannin extract and Chinese gall tannin extract are used for filling and dyeing.
2. The wet dyeing and finishing method according to claim 1, wherein the filling process uses one or more of a pterocarpus santalinus extract and a gallnut extract for filling dyeing and a ferrous metal tanning agent for fixing.
3. The wet dyeing and finishing method according to claim 1, wherein the filling process uses catechu extract and giant knotweed extract for filling dyeing.
4. The wet dyeing and finishing method according to claim 1, wherein the filling process comprises the following specific steps: adding water with the weight of 30-100% into a rotary drum, controlling the temperature in the drum to be 25-40 ℃, adding 2-8% of acrylic resin retanning agent, rotating for 20-90min, adding 3-10% of amino resin retanning agent, rotating for 20-60min, adding 0.5-3% of synthetic tanning agent, 2-10% of Huang Tanguo tannin extract, 1-5% of Chinese gall tannin extract, rotating for 20-90min, adding 0.5-3% of synthetic tanning agent, 2-10% of Huang Tanguo tannin extract, 1-5% of Chinese gall tannin extract, rotating for 30-120min, adding 100-300 water, controlling the temperature to be 45-55 ℃, adding 1-3% of formic acid, adding into the rotary drum for 1-3 times, rotating for 10-40min each time, adding 1-5% of iron metal tanning agent, rotating for 20-60min, and draining.
5. The wet dyeing and finishing method according to claim 1, wherein the filling process comprises the following specific steps: adding water with the weight of 30-100% into a rotary drum, controlling the temperature in the drum to be 25-40 ℃, adding 2-8% of acrylic resin retanning agent, rotating for 20-90min, adding 3-10% of amino resin retanning agent, rotating for 20-60min, adding 0.5-3% of synthetic tanning agent, 1-6% of catechin extract, 1-6% of polygonum cuspidatum extract, rotating for 20-90min, adding 0.5-3% of synthetic tanning agent, 1-6% of catechin extract, 1-6% of polygonum cuspidatum extract, rotating for 30-120min, adding 100-300 of water, controlling the temperature to be 45-55 ℃, adding 1-3% of formic acid, adding into the rotary drum for 1-3 times, rotating for 10-40min each time, rotating for 20-60min, and draining water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410681019.0A CN118272588A (en) | 2024-05-29 | 2024-05-29 | Dye-free wet dyeing and finishing method for leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410681019.0A CN118272588A (en) | 2024-05-29 | 2024-05-29 | Dye-free wet dyeing and finishing method for leather |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118272588A true CN118272588A (en) | 2024-07-02 |
Family
ID=91645412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410681019.0A Pending CN118272588A (en) | 2024-05-29 | 2024-05-29 | Dye-free wet dyeing and finishing method for leather |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118272588A (en) |
-
2024
- 2024-05-29 CN CN202410681019.0A patent/CN118272588A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Choudhury | Eco-friendly dyes and dyeing | |
| CN105121666A (en) | Method for treating a substrate made of animal fibers with solid particles and a chemical formulation | |
| CN107881269B (en) | Production method of waterproof flame-retardant upper leather | |
| CN102505055B (en) | Method for improving dyeing fastness of light beige semi-vegetable tanned goat leather | |
| Ding et al. | Synthesis of an amino-terminated waterborne polyurethane-based polymeric dye for high-performance dyeing of biomass-derived aldehyde-tanned chrome-free leather | |
| Chakraborty | Metal-complex dyes | |
| EP3752649B1 (en) | Process for the simultaneous tanning and dyeing of collagen containing fibrous material | |
| CN111321260B (en) | Environment-friendly chromium-free retanning method for leather | |
| CN106282436B (en) | A kind of method dyed using reactive dye to chrome tanning crust leather | |
| EP2862944B1 (en) | Ecological tanning and dyeing process and product obtained | |
| CN118272588A (en) | Dye-free wet dyeing and finishing method for leather | |
| CN101376914B (en) | Black leather tanning method | |
| CN109929953A (en) | Non-ironing general aqueous, environmental protective leather edge sealing agent of plant-chrome tanning and its preparation method and application | |
| CN104294679B (en) | The method of potassium permanganate medium oxidising dyeing | |
| CN101003953A (en) | Fixation crosslinking agent, and producing method | |
| Otutu et al. | Improving the efficiency of nesogordonia papaeverifera (danta) as a natural dye in textile making industry | |
| Rao et al. | An eco-friendly option for less-chrome and dye-free leather processing: in situ generation of natural colours in leathers tanned with Cr–Fe complex | |
| WO2023248148A1 (en) | Dyeing composition, process for its preparation, indigo dyeing of leather and indigo dyed leather | |
| CN105907899B (en) | A kind of black leathers colouring method | |
| KR20040006250A (en) | Method for dyeing of the leather using natural dyestuff | |
| CN118272587A (en) | Low-dye leather wet dyeing and finishing method | |
| CN114163635A (en) | Sulfonated pyridyl organic matter, preparation method thereof and method for improving leather yield of leather | |
| Abdulla-Al-Mamun et al. | Novel Vegetable Tanning Techniques by Notholithocarpus densiflorus Extract and Fatliquoring with Indigenous Bovine Fat | |
| Feiz et al. | Aftertreatment of direct dyes on wool and nylon 6 with syntans and a syntan/cationic system | |
| Chakraborty et al. | 3 Aspects of Mordant |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |