CN110760629A - Color changing method for cracked heavy resin embossed leather - Google Patents
Color changing method for cracked heavy resin embossed leather Download PDFInfo
- Publication number
- CN110760629A CN110760629A CN201911217071.6A CN201911217071A CN110760629A CN 110760629 A CN110760629 A CN 110760629A CN 201911217071 A CN201911217071 A CN 201911217071A CN 110760629 A CN110760629 A CN 110760629A
- Authority
- CN
- China
- Prior art keywords
- leather
- water
- rotating
- rotary drum
- blank
- 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.)
- Granted
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
- C14C1/04—Soaking
-
- 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
- C14B7/00—Special leathers and their manufacture
- C14B7/02—Composite leathers
-
- 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
- C14C15/00—Apparatus for chemical treatment or washing of hides, skins, or leather
-
- 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
- C14C5/00—Degreasing leather
-
- 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
Abstract
The invention discloses a color changing method for a cracking heavy resin embossed leather, which comprises the following steps: s1, adding the leather blank into a rotary drum, adding water into the rotary drum, controlling the water temperature to be 48-52 ℃, rotating for 25-35 min, and discharging liquid; s2, adding water, ethylene glycol ethyl ether, a degreasing agent and baking soda into the rotary drum, controlling the water temperature to be 48-52 ℃, continuously rotating for 110-130 min, and discharging liquid; s3, washing for the first time and discharging liquid; s4, adding water, ethylene glycol ethyl ether, a degreasing agent and baking soda into the rotary drum, controlling the water temperature to be 48-52 ℃, rotating for 82-98 min, and discharging liquid; and S5, performing secondary washing and draining. The color changing method has good fading effect on cracked turtles, heavy resin skins and embossed skins, the leather blank dyed again is uniform and full in color, good in flexing resistance, soft in hand feeling, good in elasticity and high in quality, and is hardly influenced compared with the leather before color changing.
Description
Technical Field
The invention relates to the technical field of leather treatment, in particular to a color changing method for a cracking heavy resin embossed leather.
Background
Generally, a large leather production company (manufacturer) has a lot of special products, such as cracked turtle skins, heavy resin skins, embossed skins and other stock skins, and the leathers can be reused after being treated, so that economic benefits are maximized.
In order to eliminate the stock and to achieve a graceful response to market changes or to recycle defective products, dyed leather blanks must be reprocessed to be returned to the market. The first problem that arises at this point is the need for a good bleaching treatment of the semifinished leather blanks. The traditional fading process is rarely adopted by leather-making enterprises due to the defects of high cost, complex operation, great influence on the quality of finished leather and the like.
The workshop section which determines the leather style in the leather-making production process is a wet finishing workshop section, and the color-changing process can restore the state of the leather blank to be before the dyeing process, so that the production process can be changed from irreversible to reversible without newly adding equipment or adjusting the layout of a workshop, remedial measures are provided for production, the loss caused by the change of a production plan can be reduced to the minimum, and the flexibility and the safety of enterprise operation are greatly improved.
However, the currently used method for changing the color of the cracked heavy resin embossed leather has the following problems:
1. the fading degree of the cracked turtle shell, the heavy resin shell and the embossed leather is low, and the performances of the leather blank after secondary dyeing, such as uneven color, hand feeling and the like, are greatly reduced;
2. after the color changing treatment is carried out on the cracked turtles, the heavy resin skins and the embossed skins, the fiber structure of the leather product is damaged to a certain degree, so that the physical and mechanical performance indexes of the leather product are greatly reduced compared with those before the color changing treatment;
3. chemical raw materials such as a processor and the like used in the process steps are not friendly to the environment and human bodies, and secondary pollution is caused;
4. the process steps are complex, the operation is inconvenient, the cost is high, and the popularization and the application are not facilitated.
Disclosure of Invention
In view of the above circumstances, an object of the present invention is to provide a method for changing the color of a cracked heavy resin embossed skin, which can effectively solve the above problems.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a method for changing color of a cracking heavy resin embossed leather comprises the following steps:
s1, taking the stored leather as a leather blank, adding the leather blank into a rotary drum, adding 135-165% of water into the rotary drum according to the mass percent of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 25-35 min;
s2, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after continuously rotating for 110-130 min;
s3, washing the leather blank processed in the step S2 for the first time, and draining;
s4, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 82-98 min;
and S5, performing secondary washing on the leather blank treated in the step S4, and draining.
Preferably, the method further comprises the following steps:
s6, adding 1.8-2.2% of water-soluble dispersant and dye according to the mass percentage of the leather blank, adjusting the adding amount of the dye according to the color of the leather, rotating for 60-80 min, and carrying out primary dyeing;
s7, carrying out primary greasing and color fixing; then, taking out the drum, and sequentially pasting, hanging and grinding the plate and the leather; then returning to the drum, and sequentially carrying out secondary dyeing and secondary fatting and color fixing; and finally, discharging the leather from the drum, and sequentially carrying out drying, vibration softening, leather grinding and milling softening to obtain the color-changed leather product.
Preferably, in step S1, the stock skin is at least one of a chapped skin, a heavy resin skin and an embossed skin.
Among them, split tortoise skins (e.g., split-head cowhide), heavy resin (e.g., polyurethane leather) skins, and embossed skins (e.g., polyurethane embossed leather).
Preferably, in step S1, the stock skin is at least one of a crazing head layer leather, a polyurethane leather, and a polyurethane embossed leather.
Preferably, in step S1, the stocked leather is used as a leather blank, the leather blank is added into the rotating drum, 150% of water is added into the rotating drum according to the mass percentage of the leather blank, the water temperature is controlled to be 50 ℃, and the liquid is discharged after the rotating drum rotates for 30 min.
Preferably, in step S2, 100% of water, 3% of ethylene glycol ethyl ether, 0.5% of degreasing agent and 0.5% of baking soda are added into the rotary drum according to the mass percentage of the leather blank, the water temperature is controlled at 50 ℃, and the liquid is discharged after rotating for 120 min.
Preferably, in step S4, 100% of water, 3% of ethylene glycol ethyl ether, 0.5% of degreasing agent and 0.5% of baking soda are added into the rotary drum according to the mass percentage of the leather blank, the water temperature is controlled at 50 ℃, and the liquid is discharged after rotating for 90 min.
Preferably, in step S3, the primary washing water is: according to the mass percentage of the leather blank, 300% of water is added into the rotary drum, the water temperature is controlled to be 26-28 ℃, and the liquid is discharged after the rotary drum rotates for 10 min.
Preferably, in step S5, the secondary washing water is: firstly, adding 300% of water into a rotary drum according to the mass percentage of a leather blank, controlling the water temperature to be 26-28 ℃, and discharging liquid after rotating for 10 min; and then adding 200% of water into the rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 26-28 ℃, and discharging the liquid after rotating for 10 min.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the method for changing the color of the cracked heavy resin embossed leather provided by the invention has the advantages that the sequence of the process (method) steps of the color changing treatment is reasonably controlled, and the process condition parameters of each step are strictly controlled (the control of the process condition parameters is the key for obtaining a good color changing effect, and the good color changing effect can be ensured only if the process condition parameters are controlled within a proper range); the cracking heavy resin embossed leather color changing method has the advantages that the bending resistance is good, the hand feeling is soft, the elasticity is good, the quality is high, compared with the leather before color changing, the hand feeling and other properties are kept good and are hardly influenced, and the fiber structure of the leather product prepared by the cracking heavy resin embossed leather color changing method is not damaged, so that the physical and mechanical property indexes of the leather product are almost kept unchanged.
In the method for changing the color of the cracking heavy resin embossed leather, water, ethylene glycol ethyl ether, a degreasing agent and baking soda are adopted for twice treatment, and the technological condition parameters of corresponding steps are strictly controlled, so that a good color-changing effect is ensured.
The chemical raw materials such as the processor and the like used in the technical steps of the cracking heavy resin embossed leather color changing method are less in consumption, are all water-soluble, are environment-friendly and human-friendly, and effectively avoid secondary pollution.
The color changing method of the cracking heavy resin embossed leather has the advantages of simple process steps, convenient operation, production cost saving and good popularization and application prospect.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the following description of the preferred embodiments of the present invention is provided in connection with specific examples, which should not be construed as limiting the present patent.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
a method for changing color of a cracking heavy resin embossed leather comprises the following steps:
s1, taking the stored leather as a leather blank, adding the leather blank into a rotary drum, adding 135-165% of water into the rotary drum according to the mass percent of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 25-35 min;
s2, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after continuously rotating for 110-130 min;
s3, washing the leather blank processed in the step S2 for the first time, and draining;
s4, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 82-98 min;
and S5, performing secondary washing on the leather blank treated in the step S4, and draining.
The method for changing the color of the cracked heavy resin embossed leather of the embodiment has the advantages that the sequence of the process (method) steps of the color changing treatment is reasonably controlled, and the process condition parameters of the steps are strictly controlled (the control of the process condition parameters is the key for obtaining a good color changing effect, and the good color changing effect can be ensured only if the process condition parameters are controlled within a proper range); the method has the advantages of good flexing resistance, soft hand feeling, good elasticity and high quality, and compared with the method before color change, the method has good performance of hand feeling and the like and is hardly influenced, which shows that the fiber structure of the leather product prepared by the cracking heavy resin embossed leather color change method of the embodiment is not damaged, and the physical and mechanical performance indexes of the leather product are almost kept unchanged.
In the color changing method of the cracking heavy resin embossed leather, water, ethylene glycol ethyl ether, a degreasing agent and baking soda are adopted for twice treatment, the technological condition parameters of the corresponding steps are strictly controlled, and a good color changing effect is ensured.
The chemical raw materials such as the processor and the like used in the technical steps of the color-changing method for the cracking heavy resin embossed leather are less in consumption, are water-soluble, are environment-friendly and human-friendly, and effectively avoid secondary pollution.
The color changing method for the cracking heavy resin embossed leather is simple in process steps, convenient to operate, capable of saving production cost and good in popularization and application prospect.
In this embodiment, the method further includes the following steps:
s6, adding 1.8-2.2% of water-soluble dispersant and dye according to the mass percentage of the leather blank, adjusting the adding amount of the dye according to the color of the leather, rotating for 60-80 min, and carrying out primary dyeing;
s7, carrying out primary greasing and color fixing; then, taking out the drum, and sequentially pasting, hanging and grinding the plate and the leather; then returning to the drum, and sequentially carrying out secondary dyeing and secondary fatting and color fixing; and finally, discharging the leather from the drum, and sequentially carrying out drying, vibration softening, leather grinding and milling softening to obtain the color-changed leather product.
The raw materials of the dispersant, the dye, etc. involved in steps S6 and S7 in this embodiment are all conventional in the art, and the kind and the amount thereof can be determined by those skilled in the art according to the needs.
The processes of pasting boards, hanging, buffing, hanging, vibrating, buffing, milling and the like are all conventional processes (prior art) in the field, and a person skilled in the art can determine condition parameters of the corresponding processes, adopted equipment and the like according to needs.
In this embodiment, in step S1, the stock skin is at least one of a chapped skin, a heavy resin skin, and an embossed skin.
In this embodiment, in step S1, the stock skin is at least one of a crazing head layer leather, a polyurethane leather, and a polyurethane embossed leather.
In this embodiment, in step S1, the stocked leather is used as a leather blank, the leather blank is added into a rotating drum, 150% of water is added into the rotating drum according to the mass percentage of the leather blank, the water temperature is controlled to be 50 ℃, and the liquid is discharged after rotating for 30 min.
In this embodiment, in step S2, based on the mass percentage of the leather blank, 100% of water, 3% of ethylene glycol ethyl ether, 0.5% of degreasing agent, and 0.5% of baking soda are added into the rotary drum, the water temperature is controlled at 50 ℃, and the liquid is drained after rotating for 120 min.
In this embodiment, in step S4, based on the mass percentage of the leather blank, 100% of water, 3% of ethylene glycol ethyl ether, 0.5% of degreasing agent, and 0.5% of baking soda are added into the rotary drum, the water temperature is controlled at 50 ℃, and the liquid is drained after rotating for 90 min.
In this embodiment, in step S3, the primary washing water is: according to the mass percentage of the leather blank, 300% of water is added into the rotary drum, the water temperature is controlled to be 26-28 ℃, and the liquid is discharged after the rotary drum rotates for 10 min.
In this embodiment, in step S5, the secondary washing water is: firstly, adding 300% of water into a rotary drum according to the mass percentage of a leather blank, controlling the water temperature to be 26-28 ℃, and discharging liquid after rotating for 10 min; and then adding 200% of water into the rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 26-28 ℃, and discharging the liquid after rotating for 10 min.
In this example, the degreaser is preferably, but not limited to, Yoxabang OC, Bassfer (China) Inc.
Example 2:
a method for changing color of a cracking heavy resin embossed leather comprises the following steps:
s1, taking the stored leather as a leather blank, adding the leather blank into a rotary drum, adding 135% of water into the rotary drum according to the mass percent of the leather blank, controlling the water temperature to be 52 ℃, and discharging liquid after rotating for 25 min;
s2, adding 95% of water, 2.5% of ethylene glycol ethyl ether, 0.46% of degreasing agent and 0.45% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 52 ℃, and discharging liquid after continuously rotating for 110 min;
s3, washing the leather blank processed in the step S2 for the first time, and draining;
s4, adding 95% of water, 2.5% of ethylene glycol ethyl ether, 0.46% of degreasing agent and 0.45% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 52 ℃, and discharging liquid after rotating for 82 min;
and S5, performing secondary washing on the leather blank treated in the step S4, and draining.
In this embodiment, the method further includes the following steps:
s6, adding 1.8% of water-soluble dispersant and dye according to the mass percentage of the leather blank, adjusting the adding amount of the dye according to the color of the leather, rotating for 80min, and carrying out primary dyeing;
s7, carrying out primary greasing and color fixing; then, taking out the drum, and sequentially pasting, hanging and grinding the plate and the leather; then returning to the drum, and sequentially carrying out secondary dyeing and secondary fatting and color fixing; and finally, discharging the leather from the drum, and sequentially carrying out drying, vibration softening, leather grinding and milling softening to obtain the color-changed leather product.
In this embodiment, in step S1, the stock leather is polyurethane leather.
In this embodiment, in step S3, the primary washing water is: according to the mass percentage of the leather blank, 300 percent of water is added into the rotary drum, the water temperature is controlled to be 26 ℃, and the liquid is discharged after the rotary drum rotates for 10 min.
In this embodiment, in step S5, the secondary washing water is: firstly, adding 300% of water into a rotary drum according to the mass percentage of a leather blank, controlling the water temperature to be 26 ℃, and discharging the liquid after rotating for 10 min; and then adding 200% of water into the rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 26 ℃, and discharging the liquid after rotating for 10 min.
In this example, the degreaser is preferably, but not limited to, Yoxabang OC, Bassfer (China) Inc.
Example 3:
a method for changing color of a cracking heavy resin embossed leather comprises the following steps:
s1, taking the stored leather as a leather blank, adding the leather blank into a rotary drum, adding 165% of water into the rotary drum according to the mass percent of the leather blank, controlling the water temperature to be 48 ℃, and discharging liquid after rotating for 35 min;
s2, adding 105% of water, 3.5% of ethylene glycol ethyl ether, 0.56% of degreasing agent and 0.55% of baking soda into the rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48 ℃, and discharging liquid after continuously rotating for 130 min;
s3, washing the leather blank processed in the step S2 for the first time, and draining;
s4, adding 105% of water, 3.5% of ethylene glycol ethyl ether, 0.56% of degreasing agent and 0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48 ℃, and discharging liquid after rotating for 98 min;
and S5, performing secondary washing on the leather blank treated in the step S4, and draining.
In this embodiment, the method further includes the following steps:
s6, adding 2.2% of water-soluble dispersant and dye according to the mass percentage of the leather blank, adjusting the adding amount of the dye according to the color of the leather, rotating for 60min, and carrying out primary dyeing;
s7, carrying out primary greasing and color fixing; then, taking out the drum, and sequentially pasting, hanging and grinding the plate and the leather; then returning to the drum, and sequentially carrying out secondary dyeing and secondary fatting and color fixing; and finally, discharging the leather from the drum, and sequentially carrying out drying, vibration softening, leather grinding and milling softening to obtain the color-changed leather product.
In this embodiment, in step S1, the stock leather is polyurethane embossed leather.
In this embodiment, in step S3, the primary washing water is: according to the mass percentage of the leather blank, 300 percent of water is added into the rotary drum, the water temperature is controlled to be 28 ℃, and the liquid is discharged after the rotary drum rotates for 10 min.
In this embodiment, in step S5, the secondary washing water is: firstly, adding 300% of water into a rotary drum according to the mass percentage of a leather blank, controlling the water temperature to be 28 ℃, and discharging the liquid after rotating for 10 min; and then adding 200% of water into the rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 28 ℃, and discharging the liquid after rotating for 10 min.
In this example, the degreaser is preferably, but not limited to, Yoxabang OC, Bassfer (China) Inc.
Example 4:
a method for changing color of a cracking heavy resin embossed leather comprises the following steps:
s1, taking the stored leather as a leather blank, adding the leather blank into a rotary drum, adding 135-165% of water into the rotary drum according to the mass percent of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 25-35 min;
s2, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after continuously rotating for 110-130 min;
s3, washing the leather blank processed in the step S2 for the first time, and draining;
s4, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 82-98 min;
and S5, performing secondary washing on the leather blank treated in the step S4, and draining.
In this embodiment, the method further includes the following steps:
s6, adding 2% of water-soluble dispersant and dye according to the mass percentage of the leather blank, adjusting the adding amount of the dye according to the color of the leather, rotating for 70min, and carrying out primary dyeing;
s7, carrying out primary greasing and color fixing; then, taking out the drum, and sequentially pasting, hanging and grinding the plate and the leather; then returning to the drum, and sequentially carrying out secondary dyeing and secondary fatting and color fixing; and finally, discharging the leather from the drum, and sequentially carrying out drying, vibration softening, leather grinding and milling softening to obtain the color-changed leather product.
In this embodiment, in step S1, the stock skin is a crazing head layer skin.
In this embodiment, in step S1, the stocked leather is used as a leather blank, the leather blank is added into a rotating drum, 150% of water is added into the rotating drum according to the mass percentage of the leather blank, the water temperature is controlled to be 50 ℃, and the liquid is discharged after rotating for 30 min.
In this embodiment, in step S2, based on the mass percentage of the leather blank, 100% of water, 3% of ethylene glycol ethyl ether, 0.5% of degreasing agent, and 0.5% of baking soda are added into the rotary drum, the water temperature is controlled at 50 ℃, and the liquid is drained after rotating for 120 min.
In this embodiment, in step S4, based on the mass percentage of the leather blank, 100% of water, 3% of ethylene glycol ethyl ether, 0.5% of degreasing agent, and 0.5% of baking soda are added into the rotary drum, the water temperature is controlled at 50 ℃, and the liquid is drained after rotating for 90 min.
In this embodiment, in step S3, the primary washing water is: according to the mass percentage of the leather blank, 300 percent of water is added into the rotary drum, the water temperature is controlled to be 27 ℃, and the liquid is discharged after the rotary drum rotates for 10 min.
In this embodiment, in step S5, the secondary washing water is: firstly, adding 300% of water into a rotary drum according to the mass percentage of a leather blank, controlling the water temperature to be 27 ℃, and discharging the liquid after rotating for 10 min; and then adding 200% of water into the rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 27 ℃, and discharging the liquid after rotating for 10 min.
In this example, the degreaser is preferably, but not limited to, Yoxabang OC, Bassfer (China) Inc.
The following performance tests were performed on the products obtained by the crazing heavy resin embossed skin color changing method of examples 2 to 4 of the present invention, and the test results are shown in table 1:
TABLE 1
As can be seen from the above table, the method of the invention has good fading effect on cracked turtle skins, heavy resin skins and embossed skins, and the leather blanks dyed again have uniform and full color and high friction-resistant color fastness; the bending resistance is good; in addition, the leather has soft hand feeling, good elasticity and high quality, and compared with the leather before color changing, the performances of hand feeling and the like are kept good and hardly influenced, which shows that the fiber structure of the leather product prepared by the cracking heavy resin embossed leather color changing method is not damaged, so that the physical and mechanical performance indexes of the leather product are almost kept unchanged.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (9)
1. A color changing method for a cracking heavy resin embossed leather is characterized by comprising the following steps:
s1, taking the stored leather as a leather blank, adding the leather blank into a rotary drum, adding 135-165% of water into the rotary drum according to the mass percent of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 25-35 min;
s2, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after continuously rotating for 110-130 min;
s3, washing the leather blank processed in the step S2 for the first time, and draining;
s4, adding 95-105% of water, 2.5-3.5% of ethylene glycol ethyl ether, 0.46-0.56% of degreasing agent and 0.45-0.55% of baking soda into a rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 48-52 ℃, and discharging liquid after rotating for 82-98 min;
and S5, performing secondary washing on the leather blank treated in the step S4, and draining.
2. The method of claim 1, further comprising the steps of:
s6, adding 1.8-2.2% of water-soluble dispersant and dye according to the mass percentage of the leather blank, adjusting the adding amount of the dye according to the color of the leather, rotating for 60-80 min, and carrying out primary dyeing;
s7, carrying out primary greasing and color fixing; then, taking out the drum, and sequentially pasting, hanging and grinding the plate and the leather; then returning to the drum, and sequentially carrying out secondary dyeing and secondary fatting and color fixing; and finally, discharging the leather from the drum, and sequentially carrying out drying, vibration softening, leather grinding and milling softening to obtain the color-changed leather product.
3. The method of claim 1, wherein in step S1, the stock skin is at least one of a tortoise shell, a heavy resin skin, and an embossed skin.
4. The method of claim 1, wherein in step S1, the stock skin is at least one of crazing-head-layer cowhide, polyurethane leather, and polyurethane embossed leather.
5. The method of claim 1, wherein in step S1, the stock leather is used as a leather blank, the leather blank is added into a rotating drum, 150% of water is added into the rotating drum according to the mass percentage of the leather blank, the water temperature is controlled to be 50 ℃, and the liquid is discharged after rotating for 30 min.
6. The method of claim 1, wherein in step S2, 100% of water, 3% of ethylene glycol ethyl ether, 0.5% of degreasing agent and 0.5% of baking soda are added into the rotary drum according to the mass percentage of the leather blank, the water temperature is controlled at 50 ℃, and the liquid is discharged after rotating for 120 min.
7. The method of claim 1, wherein in step S4, 100% water, 3% ethylene glycol ethyl ether, 0.5% degreasing agent and 0.5% baking soda are added into the rotary drum according to the weight percentage of the leather blank, the water temperature is controlled at 50 ℃, and the liquid is discharged after rotating for 90 min.
8. The method of claim 1, wherein in step S3, the primary wash water is: according to the mass percentage of the leather blank, 300% of water is added into the rotary drum, the water temperature is controlled to be 26-28 ℃, and the liquid is discharged after the rotary drum rotates for 10 min.
9. The method of claim 1, wherein in step S5, the secondary washing water is: firstly, adding 300% of water into a rotary drum according to the mass percentage of a leather blank, controlling the water temperature to be 26-28 ℃, and discharging liquid after rotating for 10 min; and then adding 200% of water into the rotary drum according to the mass percentage of the leather blank, controlling the water temperature to be 26-28 ℃, and discharging the liquid after rotating for 10 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911217071.6A CN110760629B (en) | 2019-12-03 | 2019-12-03 | Color changing method for cracked heavy resin embossed leather |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911217071.6A CN110760629B (en) | 2019-12-03 | 2019-12-03 | Color changing method for cracked heavy resin embossed leather |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110760629A true CN110760629A (en) | 2020-02-07 |
| CN110760629B CN110760629B (en) | 2022-01-18 |
Family
ID=69340692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911217071.6A Active CN110760629B (en) | 2019-12-03 | 2019-12-03 | Color changing method for cracked heavy resin embossed leather |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110760629B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499319A (en) * | 2014-12-17 | 2015-04-08 | 广东菲安妮皮具股份有限公司 | Cow leather dyeing process |
| CN105154594A (en) * | 2015-08-19 | 2015-12-16 | 际华三五一二皮革服装有限公司 | Manufacturing method for high-strength calfskin for special purpose |
| CN109628660A (en) * | 2019-01-31 | 2019-04-16 | 漳州香洲皮革有限公司 | The production method of solid embossing skin |
-
2019
- 2019-12-03 CN CN201911217071.6A patent/CN110760629B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104499319A (en) * | 2014-12-17 | 2015-04-08 | 广东菲安妮皮具股份有限公司 | Cow leather dyeing process |
| CN105154594A (en) * | 2015-08-19 | 2015-12-16 | 际华三五一二皮革服装有限公司 | Manufacturing method for high-strength calfskin for special purpose |
| CN109628660A (en) * | 2019-01-31 | 2019-04-16 | 漳州香洲皮革有限公司 | The production method of solid embossing skin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110760629B (en) | 2022-01-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103589812B (en) | A kind of preparation method of oily wax water dye soft leather | |
| CN110396837B (en) | Dyeing method of toscarna leather | |
| CN102405297B (en) | Method for tanning animal skins | |
| CN104988248A (en) | Making technology of natural dry milled leather | |
| CN110760629B (en) | Color changing method for cracked heavy resin embossed leather | |
| CN102234938A (en) | Process for manufacturing super-fiber nubuck leather | |
| CN114921597B (en) | Production method of wear-resistant scratch-resistant chromium-free tanning sofa leather | |
| CN110951040A (en) | Cationic waterborne polyurethane leather color fixing agent and preparation method thereof | |
| CN109137573A (en) | Sandwich style leatherwork method | |
| CN110541050A (en) | Production method of two-layer imitation-head-layer natural antique two-color waxing leather | |
| CN111304381B (en) | Pickling softener, ecological tanning agent and production process of soil-fattened wool leather | |
| CN105970661A (en) | Production method for super-hydrophobic superfine fiber synthetic leather | |
| CN110257569A (en) | A kind of manufacture craft of vegetable tanning first layer lether | |
| CN113417151A (en) | Environment-friendly PU artificial leather with oily-like cellular structure and preparation method thereof | |
| CN113802386A (en) | Method for manufacturing superfine fiber synthetic leather with high color fastness | |
| CN112376297A (en) | Waterproof agent and wool dyeing agent for chrome-free tanned sheep sheared fluff leather and environment-friendly dyeing process for chrome-free tanned sheep sheared fluff leather | |
| CN112853779A (en) | Sweat-resistant and water-resistant fur and dyeing process and application thereof | |
| CN110791599B (en) | Blue skin mildew spot heavy grease heavy spot-removing method | |
| CN110923371A (en) | Environment-friendly wet dyeing and finishing process for preparing original thick high-grade soft sofa leather | |
| CN111979362A (en) | Fur leather production process for eliminating electrostatic effect in fur leather product processing process | |
| CN101725059B (en) | Method for non-bath dyeing and stuffing of leather | |
| EP1941094B1 (en) | Procedure for the processing of cellulose material to obtain a product similar to leather | |
| CN108867084A (en) | A kind of production method of the superfine fiber chemical leather with three proofings function | |
| CN103773909A (en) | Processing method for sheared sheep skin leather | |
| CN107354245A (en) | A kind of improved tibet lamp cleanly production technique |
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 |