CN110938717B - White yellowing-resistant cow double-layer leather and manufacturing method thereof - Google Patents
White yellowing-resistant cow double-layer leather and manufacturing method thereof Download PDFInfo
- Publication number
- CN110938717B CN110938717B CN201911278686.XA CN201911278686A CN110938717B CN 110938717 B CN110938717 B CN 110938717B CN 201911278686 A CN201911278686 A CN 201911278686A CN 110938717 B CN110938717 B CN 110938717B
- Authority
- CN
- China
- Prior art keywords
- leather
- water
- running
- tannin
- white
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/08—Deliming; Bating; Pickling; Degreasing
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C1/00—Chemical treatment prior to tanning
- C14C1/04—Soaking
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/04—Mineral tanning
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/08—Chemical tanning by organic agents
- C14C3/10—Vegetable tanning
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C3/00—Tanning; Compositions for tanning
- C14C3/02—Chemical tanning
- C14C3/28—Multi-step processes
-
- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14C—CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING, IMPREGNATING, FINISHING; APPARATUS THEREFOR; COMPOSITIONS FOR TANNING
- C14C9/00—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes
- C14C9/02—Impregnating leather for preserving, waterproofing, making resistant to heat or similar purposes using fatty or oily materials, e.g. fat liquoring
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/0004—General aspects of dyeing
- D06P1/002—Processing by repeated dyeing, e.g. in different baths
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/653—Nitrogen-free carboxylic acids or their salts
- D06P1/6533—Aliphatic, araliphatic or cycloaliphatic
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/32—Material containing basic nitrogen containing amide groups leather skins
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Inorganic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention relates to white yellowing-resistant niu two-layer leather and a manufacturing method thereof, and belongs to the technical field of leather manufacturing. The manufacturing method of the white yellowing-resistant cow double-layer leather comprises the following steps: and (3) sequentially carrying out rewetting → primary retanning → alkali extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → pasting → drying → softening → buffing → drum throwing to obtain the white yellowing-resistant bovine bilayer leather. The white ox double-layer leather manufactured by the invention does not lose powder in the using process, has high quality and excellent performance.
Description
Technical Field
The invention belongs to the technical field of leather manufacturing, and particularly relates to white yellowing-resistant niu two-layer leather and a manufacturing method thereof.
Background
The existing light-color oxford leather, particularly the very light and white oxford leather, is not yellowing-resistant and is easy to age in the using process, so that the powder dropping phenomenon is serious, the quality of the leather is influenced after the powder dropping, and the performance of the leather is also influenced, so that the research on the white yellowing-resistant oxford leather and the manufacturing method thereof is very important.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the white yellowing-resistant niu second-layer leather and the preparation method thereof.
The invention adopts the following technical scheme:
the invention provides a method for manufacturing white yellowing-resistant cow double-layer leather, which comprises the following steps:
and (3) sequentially carrying out rewetting → primary retanning → alkali extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → pasting → drying → softening → buffing → drum throwing to obtain the white yellowing-resistant bovine bilayer leather.
Furthermore, the manufacturing method of the white yellowing-resistant oxhide two-layer leather specifically comprises the following steps:
step one, rewetting: putting wet blue leather into a rotary drum, sequentially adding 150-250% of water, 0.2-0.4% of moisture returning agent and 0.4-0.6% of degreasing agent according to the mass percentage of the wet blue leather, operating for 55-65min, adding 0.8-1.2% of acid softening enzyme and 0.8-1.2% of ammonium bisulfate, operating for 115-125min, adding 0.4-0.6% of formic acid, operating for 35-45min, adding 1.4-1.6% of spot eliminating agent, operating for 55-65min, adding 0.9-1.1% of oxalic acid, operating for 55-65min, draining, adding 250-350% of water, washing the water and draining to obtain the moisture returning leather material;
step two, retanning for one time: according to the mass percent of wet blue leather, adding 95-105% of water and 0.4-0.6% of formic acid into a rotary drum, adjusting the pH to 2.8-3.2, running for 35-45min, adding 0.8-1.2% of white tannin and 2.5-3.5% of chromium powder, running for 85-95min, adding 1.9-2.1% of fatty aldehyde, and running for 55-65min to obtain primary retanning leather;
step three, alkali extraction: according to the mass percent of wet blue leather, adding 45-55% of water and 0.8-1.2% of sodium formate into a rotary drum, running for 25-35min, adding 0.2-0.4% of baking soda, running for 25-35min, adding 0.4-0.6% of baking soda until the pH value is 4.0, draining, adding 250-350% of water, washing and draining to obtain an alkali extracting leather material;
step four, secondary retanning: according to the mass percentage of wet blue leather, 115-125% of water, 1.8-2.2% of neutralized tannin, 0.8-1.2% of white tannin, 0.3-0.7% of titanium dioxide and 1.8-2.2% of sodium formate are operated for 35-45min, 0.8-1.2% of sodium bicarbonate, 0.2-0.4% of ammonium bicarbonate, 0.9-1.1% of sodium acetate and 0.6-0.8% of sodium sulfite are added, the operation is carried out for 145min, liquid drainage is carried out, 250-350% of water is added, and after water washing, liquid drainage is carried out, so as to obtain secondary retanning leather material;
step five, primary dyeing: adding 1.9-2.1% of titanium dioxide and 0.2-0.4% of sodium acetate into a rotary drum according to the mass percent of wet blue leather, running for 30min, adding 1-2% of ammonia water, running for 10-20min, adding 1.8-2.2% of dispersed tannin and 0.4-0.6% of displaced tannin, adding corresponding dye according to the color requirement, adding 3.5-4.5% of titanium dioxide, and running for 35-45min to obtain primary dyed leather;
step six, main greasing: according to the mass percentage of the wet blue leather, running for 55-65min to obtain a main greasing leather material, wherein 2.5-3.5% of anionic grease, 3.5-4.5% of sulfited synthetic oil, 2.5-3.5% of lecithin, 0.3-0.7% of fatting agent and 0.08-0.12% of mildew preventive are mixed;
step seven, secondary dyeing: according to the mass percent of the wet blue leather, adding 8-12% of titanium dioxide and 0.3-0.7% of Corotan TF into a rotary drum, running for 25-35min, then adding 8-12% of titanium dioxide and 0.3-0.7% of Corotan TF, running for 25-35min, adding 75-85% of water and 0.4-0.6% of formic acid, running for 15min, then adding 0.8-1.2% of anti-tear auxiliary agent, running for 30min, washing water out of the drum, and sequentially carrying out plate pasting, drying, softening, leather grinding and drum falling to obtain the white yellowing-resistant cattle second-layer leather.
Furthermore, in the step one, the rewetting agent is Yoxabang W, the degreasing agent is Yoxabang OC, the acid softening enzyme is acid softening enzyme TJ-A489, and the freckle removing agent is freckle removing agent TJ-A9811.
Further, in the second step, the white tannin is SYNTAN WT, and the fatty aldehyde is litannin GM.
Still further, in step four, the neutralized tannin is tam XNL liquid, and the white tannin is SYNTAN WT.
Further, in step five, the dispersed tannin is tamm M and the substituted tannin is basdan XAR.
Furthermore, in the sixth step, the anionic grease is SURPHIROL EG-60, the sulfited synthetic oil is SYNTHOL AC, the fatting agent is TRUPON OSL, and the mildew preventive is MIRECIDE-TC/81. V.
Further, in step seven the tear resistance aid is DERMAMINA GS.
Furthermore, in the manufacturing method of the white yellowing-resistant oxhide two-layer leather, the leather is oxhide two-layer leather.
The invention also provides the white yellowing-resistant bovine double-layer leather prepared by the preparation method of the white yellowing-resistant bovine double-layer leather.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, through rewetting → primary retanning → alkali extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → pasting → drying → softening → buffing → drum throwing, the prepared white leather has light tone and plump and mellow hand feeling, and the leather has good light resistance and is not easy to fade and change color.
In the rewetting stage, Youshan W, Youshan OC, acid softening enzyme TJ-A489 and spot removing agent TJ-A9811 are used in a matching way, so that the soaking time is effectively shortened, the water penetration is accelerated, the tension between skin fibers is reduced, mildew, chemical spots, wrinkles and dead folds on blue wet skins are removed, the leather yield is improved, the collagen fibers are mildly dispersed, the loose face of the part between the hips is not caused, the absorption of chemical materials in the subsequent process is facilitated, and the guarantee is provided for endowing the leather with excellent performance;
in the primary retanning stage, the white tannin SYNTAN WT and the litharge GM are added to endow the leather with light color tone and full and smooth hand feeling, also ensure that the leather has excellent light resistance and heat resistance, and ensure that the leather obtains fine, compact and flat grain surface;
in the secondary retanning stage, tamm XNL liquid and SYNTAN WT are added, so that the permeability of the tanning agent is greatly accelerated, and the guarantee is provided for uniform dyeing and color tone in the subsequent dyeing process;
the tamm and the basdan XAR are added in the primary dyeing stage, so that the possibility of forming large particles with strong astringency by the tanning agent can be reduced, the grain surface of the leather can be compact, and the leather surface is further ensured to have plump and mellow hand feeling;
sulphirol EG-60, SYNTHOL AC, TRUPON OSL and MIRECIDE-TC/81.V are added in the main fatliquoring stage, so that the hard core of the leather is effectively reduced, the leather is endowed with light soft hand feeling, and the leather is not easy to fade and change color, wherein, the TRUPON OSL and the SULPHIROL EG-60 are compounded for use, the stability of the system is effectively increased, and the leather is endowed with excellent hand feeling, smooth grain surface and cream-like feeling;
the tear-resistant auxiliary agent is added in the secondary dyeing stage, so that the tear resistance of the dry leather can be improved, white spots cannot be formed on the leather, and the silky smooth hand feeling of the leather is further ensured.
In a word, the white cattle double-layer leather manufactured by the invention does not lose powder in the using process, has high quality and excellent performance.
Detailed Description
The present invention will be described in further detail with reference to examples.
It will be appreciated by those skilled in the art that the following examples are illustrative of the invention only and should not be taken as limiting the scope of the invention.
The main raw materials used in the invention are as follows:
rewet, Yoxabang W, Pasteur;
degreaser Yoxabang OC, Bassfer;
acid softening enzyme TJ-A489, Tingjiang Utility Co;
spot-removing agent TJ-A9811, Tingjiang Utility Co;
white tannin SYNTAN WT, smit corporation;
fatty aldehyde litdane GM, basf;
neutralizing the tannin tamm XNL liquid, basf corporation;
the dispersed tannin was Tam M, Basff;
the displaced tannin is basdan XAR, BASF corporation;
the anionic grease is SULPHIROL EG-60, smit company;
the sulfited synthetic oil is SYNTHOL AC, smit company;
the fatting agent is TRUPON OSL, Toepler company;
the mildew inhibitor is MIRECIDE-TC/81.V, Lamirsa;
the tear resistance aid is DERMAMINA GS, Dermakohler (Dermakolor);
Corotan TF，COROCHEM the tanning technology。
example 1
The manufacturing method of the white yellowing-resistant oxen second-layer leather comprises the following steps:
the wet blue leather is sequentially subjected to rewetting → primary retanning → alkali extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → sticking board → drying → softening → buffing → drum throwing, and the method comprises the following steps:
step one, rewetting: putting wet blue leather into a rotary drum, sequentially adding 200% of water, 0.2-0.4% of rewetting agent Youshan W and 0.5% of degreasing agent Youshan OC according to the mass percentage of the wet blue leather, running for 60min, adding 1.0% of acid softening enzyme TJ-A489 and 1.0% of ammonium bisulfate, running for 120min, adding 0.5% of formic acid, running for 40min, adding 1.5% of spot-removing agent TJ-A9811, running for 60min, adding 1.0% of oxalic acid, running for 60min, draining, adding 300% of water, washing and draining to obtain a rewetting leather material;
step two, retanning for one time: adding 100% of water and 0.5% of formic acid into a rotary drum according to the mass percentage of wet blue leather, adjusting the pH to 2.8-3.2, running for 40min, adding 1.0% of white tannin SYNTAN WT and 3.0% of chromium powder, running for 90min, adding 2.0% of fatty aldehyde ritan GM, and running for 60min to obtain a primary retanning leather material;
step three, alkali extraction: adding 50% of water and 1.0% of sodium formate into a rotary drum according to the mass percent of wet blue leather, running for 30min, adding 0.3% of baking soda, running for 30min, adding 0.5% of baking soda until the pH value is 4.0, draining, adding 300% of water, washing with water, and draining to obtain an alkali extraction leather material;
step four, secondary retanning: according to the mass percent of wet blue leather, 120% of water, 2.0% of neutralized tannin Tamm XNL liquid, 1.0% of white tannin SYNTAN WT, 0.5% of titanium dioxide and 2.0% of sodium formate are operated for 40min, 1.0% of baking soda, 0.3% of ammonium bicarbonate, 1.0% of sodium acetate and 0.7% of sodium sulfite are added, the operation is carried out for 140min, liquor drainage is carried out, 300% of water is added, and after water washing, liquor drainage is carried out to obtain secondary retanning leather material;
step five, primary dyeing: adding 2.0% of titanium dioxide and 0.3% of sodium acetate into a rotary drum according to the mass percentage of wet blue leather, running for 30min, adding 1.5% of ammonia water, running for 15min, adding 2.0% of dispersed tannin tamm and 0.5% of replaced tannin bas XAR, adding corresponding dye according to the color requirement, adding 4.0% of titanium dioxide, and running for 40min to obtain primary dyed leather;
step six, main greasing: according to the mass percentage of wet blue leather, 3.0 percent of anionic grease SULPHIROL EG-60, 4.0 percent of sulfited synthetic oil SYNTHOL AC, 3.0 percent of lecithin, 0.5 percent of fatliquoring agent TRUPON OSL and 0.10 percent of mildew preventive MIRECIDE-TC/81.V are run for 60min to obtain a main fatliquoring leather material;
step seven, secondary dyeing: according to the mass percent of the wet blue leather, 10% of titanium dioxide and 0.5% of Corotan TF are added into a rotating drum, the operation is carried out for 30min, 10% of titanium dioxide and 0.5% of Corotan TF are added, the operation is carried out for 30min, 80% of water and 0.5% of formic acid are added, the operation is carried out for 15min, 1.0% of anti-tearing auxiliary agent DERMAMINA GS is added, the operation is carried out for 30min, after water is washed out of the drum, the white anti-yellowing secondary bovine leather is obtained through plate pasting, drying, softening, skin grinding and drum throwing in sequence.
Example 2
The manufacturing method of the white yellowing-resistant oxen second-layer leather comprises the following steps:
the wet blue leather is sequentially subjected to rewetting → primary retanning → alkali extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → sticking board → drying → softening → buffing → drum throwing, and the method comprises the following steps:
step one, rewetting: putting wet blue leather into a rotary drum, sequentially adding 150% of water, 0.2% of rewetting agent Youshan W and 0.4% of degreasing agent Youshan OC according to the mass percentage of the wet blue leather, running for 55min, adding 0.8% of acid softening enzyme TJ-A489 and 0.8% of ammonium bisulfate, running for 115min, adding 0.4% of formic acid, running for 35min, adding 1.4% of spot eliminating agent TJ-A9811, running for 55min, adding 0.9% of oxalic acid, running for 55min, draining, adding 250% of water, washing with water and draining to obtain a rewetting leather material;
step two, retanning for one time: adding 95% of water and 0.4% of formic acid into a rotary drum according to the mass percentage of wet blue leather, adjusting the pH to 2.8-3.2, running for 35min, adding 0.8% of white tannin SYNTAN WT and 2.5% of chromium powder, running for 85min, adding 1.9% of fatty aldehyde ritan GM, and running for 55min to obtain a primary retanning leather material;
step three, alkali extraction: according to the mass percent of the wet blue leather, adding 45% of water and 0.8% -sodium formate into a rotary drum, running for 25min, adding 0.2% of baking soda, running for 25min, adding 0.4% of baking soda until the pH value is 4.0, draining, adding 250% of water, washing with water, and draining to obtain an alkali extracting leather material;
step four, secondary retanning: according to the mass percent of wet blue leather, 115% of water, 1.8% of neutralized tannin Tamm XNL liquid, 0.8% of white tannin SYNTAN WT, 0.3% of titanium dioxide and 1.8% of sodium formate are operated for 35min, 0.8% of baking soda, 0.2% of ammonium bicarbonate, 0.9% of sodium acetate and 0.6% of sodium sulfite are added, the operation is carried out for 135min, liquor drainage is carried out, 250% of water is added, and after water washing, liquor drainage is carried out, so that secondary retanning leather is obtained;
step five, primary dyeing: adding 1.9% of titanium dioxide and 0.2% of sodium acetate into a rotary drum according to the mass percentage of wet blue leather, running for 30min, adding 1% of ammonia water, running for 10min, adding 1.8% of dispersed tannin tamm and 0.4% of replaced tannin basdan XAR, adding corresponding dye according to the color requirement, adding 3.5% of titanium dioxide, and running for 35min to obtain primary dyed leather;
step six, main greasing: according to the mass percentage of wet blue leather, 2.5 percent of anionic grease SULPHIROL EG-60, 3.5 percent of sulfited synthetic oil SYNTHOL AC, 2.5 percent of lecithin, 0.3 percent of fatliquoring agent TRUPON OSL and 0.08 percent of mildew preventive MIRECIDE-TC/81.V are run for 55min to obtain a main fatliquoring leather material;
step seven, secondary dyeing: adding 8% of titanium dioxide and 0.3% of Corotan TF into a rotary drum according to the mass percentage of wet blue leather, running for 25min, adding 8% of titanium dioxide and 0.3% of Corotan TF, running for 25min, adding 75% of water and 0.4% of formic acid, running for 15min, adding 0.8% of anti-tearing auxiliary agent DERMAMINA GS, running for 30min, washing water out of the drum, and sequentially pasting, drying, softening, grinding and tumbling to obtain the white yellowing-resistant cattle double-layer leather.
Example 3
The manufacturing method of the white yellowing-resistant oxen second-layer leather comprises the following steps:
the wet blue leather is sequentially subjected to rewetting → primary retanning → alkali extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → sticking board → drying → softening → buffing → drum throwing, and the method comprises the following steps:
step one, rewetting: putting wet blue leather into a rotary drum, sequentially adding 250% of water, 0.4% of rewetting agent Youshan W and 0.6% of degreasing agent Youshan OC according to the mass percentage of the wet blue leather, running for 65min, adding 1.2% of acid softening enzyme TJ-A489 and 1.2% of ammonium bisulfate, running for 125min, adding 0.6% of formic acid, running for 45min, adding 1.6% of spot eliminating agent TJ-A9811, running for 65min, adding 1.1% of oxalic acid, running for 65min, draining, adding 350% of water, washing with water and draining to obtain a rewetting leather material;
step two, retanning for one time: adding 105% of water and 0.6% of formic acid into a rotary drum according to the mass percentage of wet blue leather, adjusting the pH to 2.8-3.2, running for 45min, adding 1.2% of white tannin SYNTAN WT and 3.5% of chromium powder, running for 95min, adding 2.1% of fatty aldehyde ritan GM, and running for 65min to obtain a primary retanning leather material;
step three, alkali extraction: adding 55% of water and 1.2% of sodium formate into a rotary drum according to the mass percent of the wet blue leather, running for 35min, adding 0.4% of sodium bicarbonate, running for 35min, adding 0.6% of sodium bicarbonate until the pH value is 4.0, draining, adding 350% of water, washing the water, and draining to obtain an alkali extraction leather material;
step four, secondary retanning: according to the mass percent of wet blue leather, 125 percent of water, 2.2 percent of neutralized tannin Tamm XNL liquid, 1.2 percent of white tannin SYNTAN WT, 0.7 percent of titanium dioxide and 2.2 percent of sodium formate are operated for 45min, 1.2 percent of baking soda, 0.4 percent of ammonium bicarbonate, 1.1 percent of sodium acetate and 0.8 percent of sodium sulfite are added, the operation is carried out for 145min, the liquor is discharged, 350 percent of water is added, and after water washing, the liquor is discharged, so that secondary retanning leather is obtained;
step five, primary dyeing: adding 2.1% of titanium dioxide and 0.4% of sodium acetate into a rotary drum according to the mass percentage of wet blue leather, operating for 30min, adding 2% of ammonia water, operating for 20min, adding 2.2% of dispersed tannin tamm and 0.6% of replaced tannin basdan XAR, adding corresponding dye according to the color requirement, adding 4.5% of titanium dioxide, and operating for 45min to obtain primary dyed leather;
step six, main greasing: according to the mass percentage of wet blue leather, 3.5 percent of anionic grease SULPHIROL EG-60, 4.5 percent of sulfited synthetic oil SYNTHOL AC, 3.5 percent of lecithin, 0.7 percent of fatliquoring agent TRUPON OSL and 0.12 percent of mildew preventive MIRECIDE-TC/81.V are operated for 65min to obtain a main fatliquoring leather material;
step seven, secondary dyeing: according to the mass percent of the wet blue leather, 12% of titanium dioxide and 0.7% of Corotan TF are added into a rotating drum, the operation is carried out for 35min, 12% of titanium dioxide and 0.7% of Corotan TF are added, the operation is carried out for 35min, 85% of water and 0.6% of formic acid are added, the operation is carried out for 15min, 1.2% of anti-tearing auxiliary agent DERMAMINA GS is added, the operation is carried out for 30min, after water is washed out of the drum, the white anti-yellowing secondary bovine leather is obtained through plate pasting, drying, softening, skin grinding and drum throwing in sequence.
The white yellowing resistant leathers obtained in examples 1 to 3 according to the invention were tested and the results are shown in the following table:
TABLE 1 test results
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The manufacturing method of the white yellowing-resistant oxen two-layer leather is characterized by comprising the following steps:
the wet blue leather is sequentially subjected to rewetting → primary retanning → alkali extraction → secondary retanning → primary dyeing → main fatliquoring → secondary dyeing → sticking board → drying → softening → buffing → drum throwing, and the method comprises the following steps:
step one, rewetting: putting wet blue leather into a rotary drum, sequentially adding 150-250% of water, 0.2-0.4% of moisture returning agent and 0.4-0.6% of degreasing agent according to the mass percentage of the wet blue leather, operating for 55-65min, adding 0.8-1.2% of acid softening enzyme and 0.8-1.2% of ammonium bisulfate, operating for 115-125min, adding 0.4-0.6% of formic acid, operating for 35-45min, adding 1.4-1.6% of spot eliminating agent, operating for 55-65min, adding 0.9-1.1% of oxalic acid, operating for 55-65min, draining, adding 250-350% of water, washing the water and draining to obtain the moisture returning leather material;
in the first step, the rewetting agent is Yoxabang W, the degreasing agent is Yoxabang OC, the acid softening enzyme is acid softening enzyme TJ-A489, and the spot removing agent is a spot removing agent TJ-A9811;
step two, retanning for one time: according to the mass percent of wet blue leather, adding 95-105% of water and 0.4-0.6% of formic acid into a rotary drum, adjusting the pH to 2.8-3.2, running for 35-45min, adding 0.8-1.2% of white tannin and 2.5-3.5% of chromium powder, running for 85-95min, adding 1.9-2.1% of fatty aldehyde, wherein the white tannin is SYNTAN WT, the fatty aldehyde is linage GM, and running for 55-65min to obtain primary retanning leather;
step three, alkali extraction: according to the mass percent of wet blue leather, adding 45-55% of water and 0.8-1.2% of sodium formate into a rotary drum, running for 25-35min, adding 0.2-0.4% of baking soda, running for 25-35min, adding 0.4-0.6% of baking soda until the pH value is 4.0, draining, adding 250-350% of water, washing and draining to obtain an alkali extracting leather material;
step four, secondary retanning: according to the mass percentage of wet blue leather, 115-125% of water, 1.8-2.2% of neutralized tannin, 0.8-1.2% of white tannin, 0.3-0.7% of titanium dioxide and 1.8-2.2% of sodium formate, wherein the neutralized tannin is Tamm XNL liquid, the white tannin is SYNTAN WT, the operation is carried out for 35-45min, 0.8-1.2% of sodium bicarbonate, 0.2-0.4% of ammonium bicarbonate, 0.9-1.1% of sodium acetate and 0.6-0.8% of sodium sulfite are added, the operation is carried out for 135-145min, the liquor is discharged, 250-350% of water is added, and after water washing, the liquor is discharged, so as to obtain secondary retanning leather material;
step five, primary dyeing: adding 1.9-2.1% of titanium dioxide and 0.2-0.4% of sodium acetate into a rotary drum according to the mass percent of wet blue leather, operating for 30min, adding 1-2% of ammonia water, operating for 10-20min, adding 1.8-2.2% of dispersed tannin and 0.4-0.6% of displaced tannin, wherein the dispersed tannin is Tam M, the displaced tannin is Basdan XAR, adding corresponding dye according to the color requirement, adding 3.5-4.5% of titanium dioxide, and operating for 35-45min to obtain primary dyed leather;
step six, main greasing: according to the mass percentage of wet blue leather, 2.5-3.5% of anionic grease SULPHIROL EG-60, 3.5-4.5% of sulfited synthetic oil SYNTHOL AC, 2.5-3.5% of lecithin, 0.3-0.7% of fatting agent TRUPON OSL and 0.08-0.12% of mildew preventive MIRECIDE-TC/81.V are operated for 55-65min to obtain a main fatting leather material;
step seven, secondary dyeing: adding 8-12% of titanium dioxide and 0.3-0.7% of Corotan TF into a rotary drum according to the mass percent of wet blue leather, running for 25-35min, then adding 8-12% of titanium dioxide and 0.3-0.7% of Corotan TF, running for 25-35min, adding 75-85% of water and 0.4-0.6% of formic acid, running for 15min, then adding 0.8-1.2% of tear-resistant assistant DERMAMINA GS, running for 30min, washing water out of the drum, and sequentially carrying out plate pasting, drying, softening, leather grinding and drum throwing to obtain the white yellowing-resistant secondary leather.
2. The white yellowing-resistant cow double-layered leather prepared by the method for preparing the white yellowing-resistant cow double-layered leather according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278686.XA CN110938717B (en) | 2019-12-13 | 2019-12-13 | White yellowing-resistant cow double-layer leather and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278686.XA CN110938717B (en) | 2019-12-13 | 2019-12-13 | White yellowing-resistant cow double-layer leather and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110938717A CN110938717A (en) | 2020-03-31 |
| CN110938717B true CN110938717B (en) | 2022-03-22 |
Family
ID=69910824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911278686.XA Active CN110938717B (en) | 2019-12-13 | 2019-12-13 | White yellowing-resistant cow double-layer leather and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110938717B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063777A (en) * | 2020-09-12 | 2020-12-11 | 漳州香洲皮革有限公司 | Soft anti-tearing anti-napping leather and manufacturing method thereof |
| CN114672597A (en) * | 2022-01-07 | 2022-06-28 | 湖南银河制革有限公司 | Method for manufacturing chromium-removed environment-friendly leather |
| WO2023242168A1 (en) | 2022-06-15 | 2023-12-21 | Renbertech S.R.L. | Method for processing hides and fabrics |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287365A (en) * | 2017-07-31 | 2017-10-24 | 漳州香洲皮革有限公司 | The preparation technology of strong force of explosion double-layer leather |
| CN107502685A (en) * | 2017-10-25 | 2017-12-22 | 漳州香洲皮革有限公司 | The preparation method of water-fastness cow split leather |
| CN107523655A (en) * | 2017-10-25 | 2017-12-29 | 漳州香洲皮革有限公司 | A kind of production technology of color inhibition light shine double-layer fur |
-
2019
- 2019-12-13 CN CN201911278686.XA patent/CN110938717B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287365A (en) * | 2017-07-31 | 2017-10-24 | 漳州香洲皮革有限公司 | The preparation technology of strong force of explosion double-layer leather |
| CN107502685A (en) * | 2017-10-25 | 2017-12-22 | 漳州香洲皮革有限公司 | The preparation method of water-fastness cow split leather |
| CN107523655A (en) * | 2017-10-25 | 2017-12-29 | 漳州香洲皮革有限公司 | A kind of production technology of color inhibition light shine double-layer fur |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110938717A (en) | 2020-03-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110938717B (en) | White yellowing-resistant cow double-layer leather and manufacturing method thereof | |
| CN104962667B (en) | A kind of quickly pure vegetable tanning cow hide production technology | |
| GB2137654A (en) | Treating pelts and leathers | |
| CN112941248B (en) | Sheep fur leather and processing technology of chrome-free tanning thereof | |
| CN111705171B (en) | Production method of cow leather upper leather for dance shoes | |
| CN101921882A (en) | Energy-saving and environmental-protection method for tanning raccoon fur | |
| CN108130755B (en) | Dyeing agent for fur leather and dyeing process for fur leather | |
| CN109811091B (en) | Production method of shrunk grain leather | |
| CN108165678A (en) | A kind of production method of suede | |
| US4443221A (en) | Tanning method | |
| CN110527755A (en) | A kind of leather method for sorting solving the big line depth of leather patterns | |
| US3901929A (en) | Wet processing of leather | |
| CN1213151C (en) | Tanning method for fish skin and after finishing method for fish skin leather | |
| CN110760628A (en) | Method for making light-color-series cattle second-layer leather | |
| US7033402B2 (en) | Transposed process for making leather | |
| CN114231669B (en) | Compact leather crust leather process | |
| CN110938719B (en) | Tannin extract oil wax skin and its making method | |
| CN104087688A (en) | Modified rice dialdehyde starch retanning filler for leather and preparation method of filler | |
| CN109097510B (en) | Method for manufacturing mercerized leather by one-step dyeing | |
| CN110938716B (en) | Method for manufacturing cow double-layer waterproof leather | |
| CN109385493A (en) | A kind of preparation method of wet-white leather | |
| CN102747171A (en) | Wet processing method of waterproof shoe upper leather | |
| CN113584238A (en) | Preparation method of environment-friendly cow leather mat leather | |
| CN113528716A (en) | Clean type tanning production system | |
| CN114085933A (en) | Low-chromium high-absorption tanning method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |