CN114231670B - Leather crust leather manufacturing process for preventing salt bloom of perforated leather - Google Patents
Leather crust leather manufacturing process for preventing salt bloom of perforated leather Download PDFInfo
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- CN114231670B CN114231670B CN202111145074.0A CN202111145074A CN114231670B CN 114231670 B CN114231670 B CN 114231670B CN 202111145074 A CN202111145074 A CN 202111145074A CN 114231670 B CN114231670 B CN 114231670B
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- 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
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/02—Fleshing, unhairing, samming, stretching-out, setting-out, shaving, splitting, or skiving skins, hides, or leather
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/40—Softening or making skins or leather supple, e.g. by staking, boarding, or crippling machines, by dry mills
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- C—CHEMISTRY; METALLURGY
- C14—SKINS; HIDES; PELTS; LEATHER
- C14B—MECHANICAL TREATMENT OR PROCESSING OF SKINS, HIDES OR LEATHER IN GENERAL; PELT-SHEARING MACHINES; INTESTINE-SPLITTING MACHINES
- C14B1/00—Manufacture of leather; Machines or devices therefor
- C14B1/58—Drying
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- 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
- C14C11/00—Surface finishing of leather
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- 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
Abstract
The invention belongs to the technical field of leather manufacturing, and discloses a leather crust leather manufacturing process for preventing salt bloom of perforated leather. The method comprises the following steps: sorting, blue wet skin backwater, wringing, shaving, pretanning, neutralizing, retanning, dyeing, fatliquoring, fixing, washing, wringing and stretching, vacuum drying, hanging and drying, primary vibration and softening, secondary vibration and softening, stretching, measuring scale sorting, packaging and warehousing. During the fatting, 4-10wt% of polysiloxane and polymer fatting agent (waterproof oil) are adopted, and 0.5-1.0wt% of chromium tannic acid is used for fixation. In the leather blank production process, a brand new retanning process is adopted, waterproof oil is introduced during fatting to establish a waterproof system, so that water cannot soak crust leather, and inorganic salt ions are dissolved; the way of cutting off inorganic salt ion crystallization precipitation avoids the occurrence of salt bloom of the perforated leather.
Description
Technical Field
The invention belongs to the technical field of leather manufacturing, and relates to a leather crust leather manufacturing process for preventing salt bloom of perforated leather.
Background
Salt cream: the salt in the leather is not sufficiently washed cleanly, when the leather is placed in a humid environment, the salt seeps out of the surface, so that a layer of white frosty substance appears on the grain surface, the salt frosting will be reappeared after being wiped, and the main production factors are in the crust leather production process.
Earthworm grain: raised hard lump boundaries appear at the edges where salt bloom appears.
With the requirement of people on leather fashion, taking car cushion leather as an example, car manufacturers prefer to punch leather more in interior design, and the risk of salt bloom is increased by punching the leather.
In the existing crust leather processing process, a large amount of chemical engineering containing a large amount of inorganic salt ions (Na + 、SO 4 2- 、Cl - 、NH 4 + Etc.), mainly to assist in permeation. After drying and finishing, a large amount of ions remain in the skin embryo. After the finished product is made, inorganic salt ions in the perforated leather can be crystallized and separated out in the process of re-drying under specific conditions (wetting),the hole is blocked, and a linear white line is formed in the hole, so that the concern and complaint of consumers are caused.
Aiming at the problem of salt bloom, the common practice in the leather industry is water washing, so that the content of inorganic salt ions in leather is reduced, and the risk of salt bloom is reduced. But this cannot fundamentally solve the problem of salt bloom. The complaint of salt bloom at the consumer end which is exploded out from time to time influences the brand of automobile manufacturers, and also makes leather suppliers face the risks of being replaced at any time and losing customers, so that the problems of eliminating risks, overcoming salt bloom and earthworm grain are the urgent needs for improving the product quality.
Disclosure of Invention
In order to solve the problems, the invention provides a leather crust leather manufacturing process for preventing salt bloom of perforated leather, which adopts a brand-new retanning process to initially introduce waterproof oil during fatliquoring in the leather crust production process to establish a waterproof system so that water cannot soak crust leather and inorganic salt ions are dissolved; the way of cutting off inorganic salt ion crystallization precipitation avoids the occurrence of salt bloom of the perforated leather.
The above object of the present invention is achieved by the following technical solutions:
a leather crust leather manufacturing process for preventing salt bloom of perforated leather; the method comprises the following steps: sorting, blue wet skin backwater, wringing, shaving, pretanning, neutralizing, retanning, dyeing, fatliquoring, fixing, washing, wringing and stretching, vacuum drying, hanging and drying, primary vibration and softening, secondary vibration and softening, stretching, measuring scale sorting, packaging and warehousing. During the fatting, 4-10wt% of polysiloxane and polymer fatting agent (waterproof oil) are adopted, and 0.5-1.0wt% of chromium tannic acid is used for fixation.
Further, the method specifically comprises the following steps:
s1, sorting: sorting and classifying the wet blue peels;
s2, backwater: returning the wet blue skin to a fresh skin state;
s3, squeezing water: controlling the moisture of the crust leather to 45-50wt% by using an inlet through tussah water machine;
s4, uniformly cutting: the problems of broken holes, uniform shaving injury, uneven thickness and the like are avoided during shaving;
s5, pretanning: the liquid ratio is 0.8-1.0, the internal temperature is 30-35 ℃, 0.5-1.0wt% of sulfitation fish oil fatliquor is added, and the rotation is carried out for 20min; adding 1.0-2.0wt% chromium tannin, and rotating for 90min;
s6, neutralization: the liquid ratio is 1.0-1.5, the internal temperature is 32-36 ℃, 2-3wt% of sodium formate is added, and the rotation is carried out for 30min; adding 0.5-1.0wt% sodium bicarbonate, and rotating for 30min; adding 0.5-1.0wt% sodium bicarbonate, and rotating for 60min; the pH is required to be between 4.8 and 5.2;
s7, retanning filling: the liquid ratio is 1.0-1.2, the internal temperature is 30-35 ℃, and the method of distributed fatting and filling is adopted: adding 1.0-1.5wt% of anionic mineral synthetic oil and 1.0-1.5wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; adding 1.0-2.0wt% of dispersible synthetic tannin, 0.2% of anti-twisting agent, 2.0-3.0wt% of melamine resin tanning agent, 2.0-3.0wt% of wattle bark tannin extract, 3-4wt% of phenolsulfonic acid auxiliary synthetic tanning agent, 2.0-2.5wt% of animal protein powder, and rotating for 40min; adding 4.5% of acrylic resin tanning agent with the effective content of 38.5-41.5wt% and rotating for 30min; adding 1.0-1.5wt% of anionic mineral synthetic oil and 1.0-1. wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; adding melamine resin tanning agent 2.0-2.5wt%, wattle bark tanning extract 2.0-3.0wt%, phenolsulfonic acid auxiliary synthetic tanning agent 4-5.0wt%, animal protein powder 2.5-3.0wt%, and rotating for 40min;
s8, dyeing: one-bath dyeing, namely adding 4.5wt% of black acid dye at one time, and rotating for 180min;
s9, adding grease: supplementing 150% of hot water, rotating for 10min, and keeping the internal temperature at 50-55 ℃. Adding 4wt% of sulfonated vegetable oil fatliquor, 4-10wt% of polysiloxane and polymer fatliquor (waterproof oil) at a time, and rotating for 60min;
s10, fixing: 1.0wt% formic acid (5-fold dilution) was added and the mixture was rotated for 20 minutes 2 times; 1.0wt% formic acid (5-fold dilution) was added and the mixture was rotated for 60 minutes at pH 3.2-3.4; adding 0.5wt% of chromium tannin, and turning for 20min;
s11, washing: discharging drums, and standing by bonding;
s12, squeezing and stretching: using a reciprocating vertical wringing machine, wherein the pressure is not higher than 40pa, the felt speed is 14+/-1 m/min, and the conveyor belt speed is 13+/-1 m/min;
s13, vacuum drying: spreading the grain surface of the crust leather downwards on a chromeplate, pushing the crust leather aside, and flattening, especially the edge part; setting a parameter vacuum degree of 0.05MPa, a temperature of 30+/-5 ℃ and a time of 300+/-50 s;
s14, hanging and airing to dry: naturally hanging and airing, wherein the humidity is 10-14% when the skin is collected;
s15, primary vibration softening: setting pressure by adopting a time-lapse vibration softening machine: 5-5-5, speed 6m/min;
s16, breaking and softening: adopts a leather milling rotary drum: and (3) setting conditions: cooling without setting temperature and humidity for 40min;
s17, secondary vibration softening: setting pressure by adopting a time-lapse vibration softening machine: 6-6-6, leveling Pi Pei at a speed of 7 m/min;
s18, stretching the plate: the temperature is 40 ℃ and the jumping distance is 2cm, so that the flatness of crust leather can be improved;
s19, sorting the measuring tape, packaging and warehousing.
Through the process, the high-grade crust leather with softness, plumpness, fine and compact grain surface can be obtained.
And S5, pretanning to S10, and fixing in a stainless steel Y-type rotary drum in sequence.
Compared with the prior art, the invention has the beneficial effects that:
1 for crust leather salt-flooding cream, the existing common practice is to strengthen water washing, but because inorganic salt is used in a large amount in the processing process of crust leather, the inorganic salt is unevenly distributed, the inorganic salt cannot be completely removed by water washing, and a large amount of water is wasted. According to the invention, waterproof oil is introduced to construct a waterproof system during S9 fatting, and a layer of hydrophobic protective layer is formed in the crust leather, so that the crust leather is not soaked, inorganic salt ions are not dissolved in a large amount, salt frost is not formed, and the occurrence of salt frost of perforated leather can be effectively prevented.
2 the waterproof system established during the greasing can lead the concentration of inorganic salt ions at the parts soaked by water to be not greatly different from that of the parts not soaked by water, and the edge of the waterproof system is not raised in the process of re-drying to form earthworm grains.
Detailed Description
The present invention is described in detail below by way of specific examples, but the scope of the present invention is not limited thereto. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and all experimental equipment, materials, reagents, etc. used can be obtained from commercial sources.
Example 1
A leather crust leather manufacturing process for preventing salt bloom of perforated leather; the method comprises the following steps: sorting, blue wet skin backwater, wringing, shaving, pretanning, neutralizing, retanning, dyeing, fatliquoring, fixing, washing, wringing and stretching, vacuum drying, hanging and drying, primary vibration and softening, secondary vibration and softening, stretching, measuring scale sorting, packaging and warehousing. In the case of fatliquoring, 4% by weight of polysiloxanes and of polymeric fatliquoring agents (water repellent oils) are used, and 0.5% by weight of chromium tannic acid is used for the post-fixing.
Further, the method specifically comprises the following steps:
s1, sorting: sorting and classifying the wet blue peels;
s2, backwater: returning the wet blue skin to a fresh skin state;
s3, squeezing water: controlling the moisture of the crust leather to 45% -50% by using an inlet through tussah water machine;
s4, uniformly cutting: the problems of broken holes, uniform shaving injury, uneven thickness and the like are avoided during shaving; S5-S10 are calculated by the weight of the shaving thickness.
S5, pretanning: the liquid ratio is 0.8-1.0, the internal temperature is 30-35 ℃, 0.5% sulfitation fish oil fatliquor is added, and the rotation is carried out for 20min; 2.0wt% of chromium tannin is added and rotated for 90 minutes;
s6, neutralization: the liquid ratio is 1.0-1.5, the internal temperature is 32-36 ℃, 3wt% of sodium formate is added, and the rotation is carried out for 30min; adding 1.0wt% sodium bicarbonate, and rotating for 30min; adding 1.0wt% sodium bicarbonate, and rotating for 60min to reach pH of 4.8-5.2;
s7, retanning filling: the liquid ratio is 1.0-1.2, the internal temperature is 30-35 ℃, and the method of distributed fatting and filling is adopted: adding 1.5wt% of anionic mineral synthetic oil and 1.0wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; adding 1.0wt% of dispersible synthetic tannin, 0.2wt% of anti-twisting agent, 2.0wt% of melamine resin tanning agent, 2.0wt% of wattle bark tannin extract, 4wt% of phenolsulfonic acid auxiliary synthetic tanning agent, 2.5wt% of animal protein powder, and rotating for 40 minutes; adding 4.5wt% of acrylic resin tanning agent with the effective content of 38.5wt% and rotating for 30min; adding 1.5wt% of anionic mineral synthetic oil and 1.0wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; then adding 2.0wt% melamine resin tanning agent, 2.0wt% wattle bark tannin extract, 4wt% phenolsulfonic acid auxiliary type synthetic tanning agent, 2.5wt% animal protein powder, rotating for 40 minutes;
s8, dyeing: one-bath dyeing, namely adding 4.5wt% of black acid dye at one time, and rotating for 180min;
s9, adding grease: the water is supplemented with 150 weight percent of hot water, and the water is rotated for 10 minutes, and the internal temperature is 50-55 ℃. Adding 4wt% of sulfonated vegetable oil fatliquor, 4-10wt% of polysiloxane and polymer fatliquor (waterproof oil) at a time, and rotating for 60min;
s10, fixing: 1.0wt% formic acid (5-fold dilution) was added and the mixture was rotated for 20 minutes 2 times; 1.0wt% formic acid (5-fold dilution) was added and the mixture was rotated for 60 minutes at pH 3.2-3.4; adding 0.5wt% of chromium tannin, and turning for 20min;
s11, washing: discharging drums, and standing by bonding;
s12, squeezing and stretching: using a reciprocating vertical wringing machine, wherein the pressure is not higher than 40pa, the felt speed is 14+/-1 m/min, and the conveyor belt speed is 13+/-1 m/min;
s13, vacuum drying: spreading the grain surface of the crust leather downwards on a chromeplate, pushing the crust leather aside, and flattening, especially the edge part; setting a parameter vacuum degree of 0.05MPa, a temperature of 30+/-5 ℃ and a time of 300+/-50 s;
s14, hanging and airing to dry: naturally hanging and airing, wherein the humidity is 10-14wt% when the skin is collected;
s15, primary vibration softening: setting pressure by adopting a time-lapse vibration softening machine: 5-5-5, speed 6m/min;
s16, breaking and softening: adopts a leather milling rotary drum: and (3) setting conditions: cooling without setting temperature and humidity for 40min;
s17, secondary vibration softening: setting pressure by adopting a time-lapse vibration softening machine: 6-6-6, leveling Pi Pei at a speed of 7 m/min;
s18, stretching the plate: the temperature is 40 ℃ and the jumping distance is 2cm, so that the flatness of crust leather can be improved;
s19, sorting the measuring tape, packaging and warehousing.
Through the process, the high-grade crust leather with softness, plumpness, fine and compact grain surface can be obtained.
And S5, pretanning to S10, and fixing in a stainless steel Y-type rotary drum in sequence.
Example 2
A leather crust leather manufacturing process for preventing salt bloom of perforated leather; the method comprises the following steps: sorting, blue wet skin backwater, wringing, shaving, pretanning, neutralizing, retanning, dyeing, fatliquoring, fixing, washing, wringing and stretching, vacuum drying, hanging and drying, primary vibration and softening, secondary vibration and softening, stretching, measuring scale sorting, packaging and warehousing. In the case of fatliquoring, 10% by weight of polysiloxanes and of polymeric fatliquoring agents (water repellent oils) are used, after fixing with 1.0% by weight of chromium tannic acid.
Further, the method specifically comprises the following steps:
s1, sorting: sorting and classifying the wet blue peels;
s2, backwater: returning the wet blue skin to a fresh skin state;
s3, squeezing water: controlling the moisture of the crust leather to 45% -50% by using an inlet through tussah water machine;
s4, uniformly cutting: the problems of broken holes, uniform shaving injury, uneven thickness and the like are avoided during shaving; S5-S10 are calculated by the weight of the shaving thickness.
S5, pretanning: the liquid ratio is 0.8-1.0, the internal temperature is 30-35 ℃, 0.5wt% of sulfitation fish oil fatliquor is added, and the rotation is carried out for 20min; 2.0wt% of chromium tannin is added and rotated for 90 minutes;
s6, neutralization: the liquid ratio is 1.0-1.5, the internal temperature is 32-36 ℃, 3wt% of sodium formate is added, and the rotation is carried out for 30min; adding 1.0wt% sodium bicarbonate, and rotating for 30min; adding 1.0wt% sodium bicarbonate, and rotating for 60min to reach pH of 4.8-5.2;
s7, retanning filling: the liquid ratio is 1.0-1.2, the internal temperature is 30-35 ℃, and the method of distributed fatting and filling is adopted: adding 1.5wt% of anionic mineral synthetic oil and 1.0wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; adding 1.0wt% of dispersible synthetic tannin, 0.2wt% of anti-twisting agent, 2.0wt% of melamine resin tanning agent, 2.0wt% of wattle bark tannin extract, 4wt% of phenolsulfonic acid auxiliary synthetic tanning agent, 2.5wt% of animal protein powder, and rotating for 40 minutes; adding 4.5wt% of acrylic resin tanning agent with the effective content of 41.5wt% and rotating for 30min; adding 1.5wt% of anionic mineral synthetic oil and 1.0wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; then adding 2.0wt% melamine resin tanning agent, 2.0wt% wattle bark tannin extract, 4wt% phenolsulfonic acid auxiliary type synthetic tanning agent, 2.5wt% animal protein powder, rotating for 40 minutes;
s8, dyeing: one-bath dyeing, namely adding 4.5wt% of black acid dye at one time, and rotating for 180min;
s9, adding grease: the water is supplemented with 150 weight percent of hot water, and the water is rotated for 10 minutes, and the internal temperature is 50-55 ℃. 10wt% of a sulfonated vegetable oil fatliquoring agent, 10wt% of polysiloxane and a polymer fatliquoring agent (waterproof oil) are added at a time, and the mixture is rotated for 60min;
s10, fixing: 1.0wt% formic acid (5-fold dilution) was added and the mixture was rotated for 20 minutes 2 times; 1.0wt% formic acid (5-fold dilution) was added and the mixture was rotated for 60 minutes at pH 3.2-3.4; adding 0.5wt% of chromium tannin, and turning for 20min;
s11, washing: discharging drums, and standing by bonding;
s12, squeezing and stretching: using a reciprocating vertical wringing machine, wherein the pressure is not higher than 40pa, the felt speed is 14+/-1 m/min, and the conveyor belt speed is 13+/-1 m/min;
s13, vacuum drying: spreading the grain surface of the crust leather downwards on a chromeplate, pushing the crust leather aside, and flattening, especially the edge part; setting a parameter vacuum degree of 0.05MPa, a temperature of 30+/-5 ℃ and a time of 300+/-50 s;
s14, hanging and airing to dry: naturally hanging and airing, wherein the humidity is 10-14wt% when the skin is collected;
s15, primary vibration softening: setting pressure by adopting a time-lapse vibration softening machine: 5-5-5, speed 6m/min;
s16, breaking and softening: adopts a leather milling rotary drum: and (3) setting conditions: cooling without setting temperature and humidity for 40min;
s17, secondary vibration softening: setting pressure by adopting a time-lapse vibration softening machine: 6-6-6, leveling Pi Pei at a speed of 7 m/min;
s18, stretching the plate: the temperature is 40 ℃ and the jumping distance is 2cm, so that the flatness of crust leather can be improved;
s19, sorting the measuring tape, packaging and warehousing.
Through the process, the high-grade crust leather with softness, plumpness, fine and compact grain surface can be obtained.
And S5, pretanning to S10, and fixing in a stainless steel Y-type rotary drum in sequence.
Comparative example 1
The prior art improvement batch (stronger water wash) comprises the following steps: sorting, blue wet skin backwater, water squeezing, shaving, neutralization, retanning, dyeing, fatliquoring, fixing, washing, water squeezing and stretching, vacuum drying, hanging and drying, primary vibration softening, secondary vibration softening, stretching, measuring scale sorting, packaging and warehousing. The key steps are as follows
S1 retanning filling: the liquid ratio is 1.0-1.5, the acrylic resin tanning agent with the effective content of 41.5wt% is added with 6wt% at the temperature of 30-35 ℃ and rotated for 30min, then dispersed tannin with the content of 1.5%, wattle tannin extract with the content of 8% and synthetic tanning agent with the content of 6% and animal protein with the content of 5% are added, and the rotation is carried out for 180min.
S2, adding 4.5% of black acid dye at a time, rotating for 120min
S3, fatting: adding 5% sulfonated vegetable oil and fat, 2% sulfited fish oil and 2% lecithin into the mixture for 60 minutes, and washing the mixture with water: 300wt% water at 30 ℃ and rotating for 15min, twice
The random sampling test method is adopted for verification, and the method comprises the following steps:
20 pieces of leather blocks with the size of A5 at different positions are randomly cut in the whole batch (240 pieces), the leather blocks are soaked in 30ML water after being punched, the leather blocks are placed in an environment of 5-10 ℃, and after the leather blocks are dried, whether salt frost is formed in holes or not is observed, and whether raised earthworm grains exist at the edge of a soaking area or not is observed.
5 batches, 100 samples, of each of the different schemes were extracted and verified as above to give the following results shown in table 1:
TABLE 1 sample detection results Table for different schemes
The statistical data shows that the perforated automotive crust leather produced by the invention can effectively prevent the occurrence of salt bloom and solve the problem of earthworm lines caused by salt bloom.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the scope of the invention as claimed.
Claims (4)
1. The leather crust leather manufacturing process for preventing salt bloom of perforated leather is characterized by comprising the following steps of: sorting, blue wet skin backwater, wringing, shaving, pretanning, neutralizing, retanning, dyeing, fatliquoring, fixing, washing, wringing and stretching, vacuum drying, hanging and drying, primary vibration and softening, breaking and softening, secondary vibration and softening, stretching, measuring scale sorting, packaging and warehousing; during the fatting, 10wt% of polysiloxane and polymer fatting agent are adopted, and 0.5-1.0wt% of chromium tannic acid is used for fixation;
the fatting is specifically as follows: supplementing 150% of hot water, rotating for 10min, and keeping the internal temperature at 50-55 ℃; adding 4wt% of sulfonated vegetable oil fatliquor, 10% by weight of polysiloxane and polymer fatliquor at a time, and rotating for 60min;
retanning filling: the liquid ratio is 1.0-1.2, the internal temperature is 30-35 ℃, and the method of distributed fatting and filling is adopted: adding 1.0-1.5-wt% of anionic mineral synthetic oil and 1.0-1.5-wt% of sulfonated vegetable oil fatliquor; adding 1.0-2.0wt% of dispersible synthetic tannin, 0.2% of anti-twisting agent, 2.0-3.0wt% of melamine resin tanning agent, 2.0-3.0wt% of wattle bark tannin extract, 3-4wt% of phenolsulfonic acid auxiliary synthetic tanning agent and 2.0-2.5wt% of animal protein powder; adding 4.5% of acrylic resin tanning agent with the effective content of 38.5-41.5 wt%; adding 1.0-1.5wt% of anionic mineral synthetic oil and 1.0-1.5wt% of sulfonated vegetable oil fatliquor; adding melamine resin tanning agent 2.0-2.5-wt%, wattle bark tannin extract 2.0-3.0-wt%, phenolsulfonic acid auxiliary synthetic tanning agent 4-5.0-wt%, animal protein powder 2.5-3.0 wt%;
the retanning filling is specifically as follows: the liquid ratio is 1.0-1.2, the internal temperature is 30-35 ℃, and the method of distributed fatting and filling is adopted: adding 1.0-1.5-wt% of anionic mineral synthetic oil and 1.0-1.5-wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; adding 1.0-2.0wt% of dispersible synthetic tannin, 0.2% of anti-twisting agent, 2.0-3.0wt% of melamine resin tanning agent, 2.0-3.0wt% of wattle bark tannin extract, 3-4wt% of phenolsulfonic acid auxiliary synthetic tanning agent, 2.0-2.5wt% of animal protein powder, and rotating for 40min; adding 4.5% of acrylic resin tanning agent with the effective content of 38.5-41.5wt% and rotating for 30min; adding 1.0-1.5-wt% of anionic mineral synthetic oil and 1.0-1.5-wt% of sulfonated vegetable oil fatliquor, and rotating for 30min; adding melamine resin tanning agent 2.0-2.5-wt%, wattle bark tannin extract 2.0-3.0-wt%, phenolsulfonic acid auxiliary synthetic tanning agent 4-5.0-wt%, animal protein powder 2.5-3.0%, and rotating for 40min.
2. The leather crust leather manufacturing process for preventing salt bloom of perforated leather as set forth in claim 1, wherein the pre-retanning: the liquid ratio is 0.8-1.0, the internal temperature is 30-35 ℃, 0.5-1.0wt percent of sulfitation fish oil fatliquor is added, and the rotation is carried out for 20min; adding 1.0-2.0. 2.0wt% chromium tannin, and rotating for 90min.
3. The leather crust leather manufacturing process for preventing salt bloom of perforated leather as set forth in claim 1, wherein the process is characterized by neutralization: the liquid ratio is 1.0-1.5, the internal temperature is 32-36 ℃, 2-3wt% sodium formate is added, and the rotation is carried out for 30min; adding 0.5-1.0wt% sodium bicarbonate, and rotating for 30min; adding 0.5-1.0wt% sodium bicarbonate, and rotating for 60min; the pH is required to be between 4.8 and 5.2.
4. The leather crust leather manufacturing process for preventing salt bloom of perforated leather as set forth in claim 1, wherein the process comprises the following steps of: one-bath dyeing, adding 4.5. 4.5wt% of black acid dye at a time, and rotating for 180min.
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| US5782961A (en) * | 1994-03-22 | 1998-07-21 | Karlsson; Ernst Folke Jean | Method for the protective treatment of mineral material structures, treatment composition intended for performing of the method and use thereof |
| JP2009286993A (en) * | 2008-05-26 | 2009-12-10 | Koichiro Yoshida | Animal skin tanning method using no heavy metal such as chromium or aldehyde tanning agent |
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| CN108486293A (en) * | 2018-03-13 | 2018-09-04 | 齐河力厚化工有限公司 | A kind of preparation method of polymer leather fatting agent |
| CN109628655A (en) * | 2018-12-17 | 2019-04-16 | 兴业皮革科技股份有限公司 | A kind of silk floss maceration type wholegrain facial plane leather production technology |
| CN109628656A (en) * | 2018-12-17 | 2019-04-16 | 兴业皮革科技股份有限公司 | It is a kind of to steep the soft production technology for falling line leather |
| CN111705171A (en) * | 2020-07-06 | 2020-09-25 | 河南中牛实业有限公司 | Production method of cow leather upper leather for dance shoes |
| CN112501364A (en) * | 2020-12-08 | 2021-03-16 | 兴业皮革科技股份有限公司 | Preparation method of ecological functional leather based on nano material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5782961A (en) * | 1994-03-22 | 1998-07-21 | Karlsson; Ernst Folke Jean | Method for the protective treatment of mineral material structures, treatment composition intended for performing of the method and use thereof |
| JP2009286993A (en) * | 2008-05-26 | 2009-12-10 | Koichiro Yoshida | Animal skin tanning method using no heavy metal such as chromium or aldehyde tanning agent |
| CN105671223A (en) * | 2016-03-03 | 2016-06-15 | 广州市迪孚卡乐进出口贸易有限公司 | Leather oil cream remover |
| CN108486293A (en) * | 2018-03-13 | 2018-09-04 | 齐河力厚化工有限公司 | A kind of preparation method of polymer leather fatting agent |
| CN109628655A (en) * | 2018-12-17 | 2019-04-16 | 兴业皮革科技股份有限公司 | A kind of silk floss maceration type wholegrain facial plane leather production technology |
| CN109628656A (en) * | 2018-12-17 | 2019-04-16 | 兴业皮革科技股份有限公司 | It is a kind of to steep the soft production technology for falling line leather |
| CN111705171A (en) * | 2020-07-06 | 2020-09-25 | 河南中牛实业有限公司 | Production method of cow leather upper leather for dance shoes |
| CN112501364A (en) * | 2020-12-08 | 2021-03-16 | 兴业皮革科技股份有限公司 | Preparation method of ecological functional leather based on nano material |
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