CN107699644B - Crazy horse leather and its preparing process - Google Patents
Crazy horse leather and its preparing process Download PDFInfo
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- CN107699644B CN107699644B CN201710948123.1A CN201710948123A CN107699644B CN 107699644 B CN107699644 B CN 107699644B CN 201710948123 A CN201710948123 A CN 201710948123A CN 107699644 B CN107699644 B CN 107699644B
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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
- C14C13/00—Manufacture of special kinds or leather, e.g. vellum
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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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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The invention discloses crazy horse leather, wherein a first bottom coat, a second bottom coat, a coating layer and a surface layer are sequentially sprayed on the surface of a leather blank; the preparation process of the crazy horse leather comprises the following steps: the crazy horse leather has the advantages of smooth leather surface, strong hand feeling, high leather utilization rate, environment-friendly and energy-saving preparation process and simple and convenient process operation.
Description
Technical Field
The invention belongs to the technical field of leather, and particularly relates to crazy horse leather and a preparation process thereof.
Background
Leather is animal skin which is obtained by physical and chemical processing such as unhairing, tanning and the like and is denatured and not easy to rot, and is a garment and a process material. The leather is formed by tightly weaving natural protein fibers in a three-dimensional space, and the surface of the leather is provided with a special grain surface layer which has natural grains and luster and comfortable hand feeling.
Traditional synthetic leather is base cloth layer, wet process this layer and dry process veneer layer constitution for the synthetic leather is whole flat, stiff, and surface color is unanimous, gives the sensation of rigid, is difficult to satisfy and modern dress designing's demand. The crazy horse leather has disordered surface and strong hand feeling and corium sense, can present the color changing effect of the ground color when twisted, occupies the status of high-grade products in the corium market, is unique in the leather bags, the waistbands and the shoes market, and is particularly suitable for being made into high-grade waistband products due to better flexibility. The market sales of the crazy horse skin products at foreign countries, particularly in Europe, America and Japan, are far higher than the sales at home; because the consumer view of foreign people has higher acceptance of the crazy horse leather product.
The Chinese invention patent with the application number of 201610608023.X discloses a manufacturing process of red sandalwood crazy horse leather, which comprises the following steps: mixing ingredients by a wet method; step two: wet bass production; step three: mixing ingredients by a dry method; step four: dry-process veneering; step five: embossing; step six: printing; step seven: the crazy horse leather prepared by the method has layering and various patterns, but the technological process adopts wet and dry mixing and is complex, dimethyl formyl is adopted in the step a, the dimethyl formyl has certain toxicity, and the leather product is a personal product of people and generates certain harm to human body. The raw material leather blanks of the crazy horse leather are mostly buffalo and other leather blanks, the damage of the leather blanks is more, a lot of difficulty and unnecessary processes are brought to the leather blank post-production process, and the production efficiency is low. Therefore, the crazy horse leather and the preparation process thereof are environment-friendly, energy-saving, simple and convenient in process operation, high in production efficiency, smooth in leather surface and capable of improving the utilization rate of the leather.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the crazy horse leather which is environment-friendly, energy-saving, simple and convenient in process operation, high in production efficiency, high in leather utilization rate and smooth in leather surface and the preparation process thereof.
The invention adopts the following technical scheme:
the crazy horse leather is coated with a first bottom coat, a second bottom coat, a coating layer and a surface layer on the surface of the leather blank in sequence.
Further, the first base coat comprises the following components in percentage by weight of the leather blank: 290-320% of water, 90-110% of water-based oil wax and 90-110% of penetrating agent.
Further, the second base coat comprises the following components in percentage by weight of the leather blank: 18-23% of a surfactant.
Further, the method comprises the following steps:
step one, backwater standing:
placing the leather embryo into a rotary drum for backwater, draining, standing to obtain backwater leather embryo, wherein the following components in percentage by weight are added in the backwater process: 80-90% of water and 12-17% of rewetting oil;
step two, beating the drum and vibrating for softening
And (3) performing drum throwing on the backwater leather blank obtained in the step one, and vibrating and softening the backwater leather blank to obtain vibrating and softening leather, so that the leather blank is in a flat state, wherein the drum throwing time is 0.5-1.5 h.
Step three, spraying a first bottom coating:
spraying a first bottom coating on the vibration soft leather obtained in the step two for 2-4 times to obtain a first bottom coating material;
step four, spraying a second bottom coating, repairing the flaw and standing:
spraying a second bottom coating on the first bottom-coated leather obtained in the step three, repairing the leather sprayed with the second bottom coating, and standing to obtain a second bottom-coated leather, wherein the standing time is 3-5 hours;
step five, polishing and roll finishing:
sequentially polishing and roll finishing the second bottom coating leather obtained in the step four to obtain roll finishing leather, wherein the roll finishing temperature is 100-110 ℃, and the roll finishing pressure is 19-23 kg;
step six, spraying the coating:
spraying paint on the roll-finished leather obtained in the fifth step to obtain sprayed leather;
step seven, rolling surface oil:
rolling surface oil on the sprayed leather obtained in the sixth step to obtain a rolled oil leather material;
step eight, drying:
and drying the rolling oil leather material obtained in the seventh step to obtain the crazy horse leather, wherein the drying temperature is 75-85 ℃, and the drying time is 0.5-1.5 h.
Further, in the water returning process in the step one, the following components in percentage by weight of the skin blank are added: 85% of water and 15% of rewetting oil.
Further, the drum throwing time in the second step is 1 h.
Further, in the third step, the first base coat comprises the following components in percentage by weight of the blank: 300% of water, 100% of water-based oil wax and 100% of penetrating agent.
Further, the standing time in the fourth step is 4 hours; the second base coat comprises the following components in percentage by weight of the blank: 20% of surfactant.
Further, in the fifth step, the roll finishing temperature is 105 ℃, and the roll finishing pressure is 20 kg.
And furthermore, in the step eight, the drying temperature is 80 ℃, and the drying time is 1 h.
Compared with the prior art, the invention has the following beneficial effects:
in the first bottom coating sprayed on the surface of the crazy horse leather, the penetrating agent is natural emulsion with strong penetrating capability and is embedded into the leather embryo fiber together with the water-based oil wax, so that the surface of the leather embryo fiber is wet, the softness of the leather embryo is improved, the hardness of the leather embryo is enhanced, the aesthetic property of the leather embryo is improved, and the leather has a natural appearance with warm wax feeling;
meanwhile, the surfactant can smoothly permeate into the leather embryo fibers in the step of spraying the second base coat, the softness of the leather embryo is improved, the coating and surface oil spraying are facilitated to be uniform, the leather embryo is easier to absorb, the hand feeling of the leather embryo is improved, and the crazy horse leather obtained after the process is finished has a color changing effect under the illumination.
Detailed Description
The raw materials used in the invention are all commercial products, wherein:
rewet oil 94S rewet oil from Phenis chemical group, Italy;
the water-based oil wax is water-based oil wax RODAwax4097 available from Deri leather science and technology Limited;
the penetrating agent is natural wax emulsion TOMEWAX3305 available from Toume leather chemical industry Co., Ltd;
the surfactant is a nonionic penetrant DRIVER5511 available from Darwey science and technology, Inc. of Sichuan;
the coating is an anionic coating purchased from Sichuan Dawei science and technology company Limited;
the surface oil was obtained from the Jusheng crazy horse GS-L42, Inc. of Jusheng oleo Chemicals, Inc.
Example 1
The crazy horse leather is coated with a first bottom coat, a second bottom coat, a coating layer and a surface layer in sequence.
The preparation process of the crazy horse leather comprises the following steps:
step one, backwater standing:
placing the leather embryo into a rotary drum for backwater, draining, standing to obtain backwater leather embryo, wherein the following components in percentage by weight are added in the backwater process: 80% of water and 12% of rewetting oil, can effectively remove impurities on the surface of the skin blank, and is prepared for a subsequent treatment process;
step two, beating the drum and vibrating for softening
And (3) tumbling the backwater leather blank obtained in the step one, and vibrating and softening the backwater leather blank to obtain vibrating and softening leather, so that the leather blank is in a flat state, wherein the tumbling time is 0.5 h.
Step three, spraying a first bottom coating:
and C, spraying a first base coat on the vibration soft leather obtained in the step two for 2 times to obtain a first base coat leather, wherein the first base coat comprises the following components in percentage by weight: 300% of water, 100% of coating and 100% of penetrating agent;
step four, spraying a second bottom coating, repairing the flaw and standing:
spraying a second bottom coating on the first bottom-coated leather obtained in the step three, repairing the leather sprayed with the second bottom coating, and standing to obtain a second bottom-coated leather, wherein the standing time is 3 hours; the second base coat comprises the following components in percentage by weight of the blank: 18% of a surfactant;
step five, polishing and roll finishing:
polishing and roll finishing the second bottom coating leather obtained in the step four to obtain roll finishing leather, wherein the temperature in the roll finishing process is 105 ℃, and the roll finishing pressure is 22 kg;
step six, spraying the coating:
spraying paint on the roll-finished leather obtained in the fifth step to obtain sprayed leather;
step seven, rolling surface oil:
rolling surface oil on the coating leather obtained in the sixth step to obtain a rolling oil leather material;
step eight, drying:
and (5) drying the rolling oil leather material obtained in the seventh step to obtain the crazy horse leather, wherein the drying temperature is 75 ℃, and the drying time is 0.5 h.
Example 2
The crazy horse leather is coated with a first bottom coat, a second bottom coat, a coating layer and a surface layer in sequence.
The preparation process of the crazy horse leather comprises the following steps:
step one, backwater standing:
placing the leather embryo into a rotary drum for backwater, draining, standing to obtain backwater leather embryo, wherein the following components in percentage by weight are added in the backwater process: 85% of water and 15% of rewetting oil, can effectively remove impurities on the surface of the skin blank, and is prepared for a subsequent treatment process;
step two, beating the drum and vibrating for softening
And (3) performing drum throwing on the backwater leather blank obtained in the step one, and vibrating and softening the backwater leather blank to obtain vibrating and softening leather so as to enable the leather blank to return to a flat state, wherein the drum throwing time is 1 h.
Step three, spraying a first bottom coating:
and C, spraying a first base coat on the vibration soft leather obtained in the step two for 3 times to obtain a first base coat leather, wherein the first base coat comprises the following components in percentage by weight: 300% of water, 100% of water-based oil wax and 100% of penetrating agent;
step four, spraying a second bottom coating, repairing the flaw and standing:
spraying a second bottom coating on the first bottom-coated leather obtained in the step three, repairing the leather sprayed with the second bottom coating, and standing to obtain a second bottom-coated leather, wherein the standing time is 4 hours; the second base coat comprises the following components in percentage by weight of the blank: 20% of a surfactant;
step five, polishing and roll finishing:
polishing and roll finishing the second bottom coating leather obtained in the step four to obtain roll finishing leather, wherein the temperature in the roll finishing process is 105 ℃, and the roll finishing pressure is 20 kg;
step six, spraying the coating:
spraying paint on the roll-finished leather obtained in the fifth step to obtain paint leather;
step seven, rolling surface oil:
rolling surface oil on the coating leather obtained in the sixth step to obtain a rolling oil leather material;
step eight, drying:
and (5) drying the rolling oil leather material obtained in the step seven to obtain the crazy horse leather, wherein the drying temperature is 80 ℃, and the drying time is 1 h.
Example 3
The crazy horse leather is coated with a first bottom coat, a second bottom coat, a coating layer and a surface layer in sequence.
The preparation process of the crazy horse leather comprises the following steps:
step one, backwater standing:
placing the leather embryo into a rotary drum for backwater, draining, standing to obtain backwater leather embryo, wherein the following components in percentage by weight are added in the backwater process: 90% of water and 17% of rewetting oil, can effectively remove impurities on the surface of the skin blank, and is prepared for a subsequent treatment process;
step two, beating the drum and vibrating for softening
And (3) tumbling the backwater leather blank obtained in the step one, and vibrating and softening the backwater leather blank to obtain vibrating and softening leather, so that the leather blank is in a flat state, wherein the tumbling time is 1.5 h.
Step three, spraying a first bottom coating:
and C, spraying a first base coat on the vibration soft leather obtained in the step two for 4 times to obtain a first base coat leather, wherein the first base coat comprises the following components in percentage by weight: 320% of water, 110% of water-based oil wax and 110% of penetrant;
step four, spraying a second bottom coating, repairing the flaw and standing:
spraying a second bottom coating on the first bottom-coated leather obtained in the step three, repairing the leather sprayed with the second bottom coating, and standing to obtain a second bottom-coated leather, wherein the standing time is 5 hours; the second base coat comprises the following components in percentage by weight of the blank: 23% of a surfactant;
step five, polishing and roll finishing:
polishing and roll finishing the second bottom coating leather obtained in the step four to obtain roll finishing leather, wherein the temperature in the roll finishing process is 105 ℃, and the roll finishing pressure is 23 kg;
step six, spraying the coating:
spraying paint on the roll-finished leather obtained in the fifth step to obtain sprayed leather;
step seven, rolling surface oil:
rolling surface oil on the coating leather obtained in the sixth step to obtain a rolling oil leather material;
step eight, drying:
and (5) drying the pre-dried leather obtained in the seventh step to obtain the crazy horse leather, wherein the drying temperature is 85 ℃, and the drying time is 1.5 hours.
The performance of the crazy horse leather obtained in the embodiments 1 to 3 of the invention is tested, and the test results are shown in the following table 1:
table 1: results of detection of crazy horse leather obtained in examples 1 to 3
As can be seen from table 1, the crazy horse leather of the present invention has the advantages of high tearing strength, high tensile strength, high peeling resistance, high elongation, high abrasion resistance and high bending resistance, so that the crazy horse leather has a wide application range, effectively maintains the visual effect and the hand feeling of the surface of the crazy horse leather, and prolongs the service life.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. The crazy horse leather is characterized in that a first bottom coat, a second bottom coat, a coating layer and a surface layer are sequentially sprayed on the surface of a leather blank;
the first base coat comprises the following components in percentage by weight of the leather blank: 290-320% of water, 90-110% of water-based oil wax and 90-110% of penetrating agent;
the second base coat comprises the following components in percentage by weight of the blank: 18-23% of a surfactant;
the preparation process of the crazy horse leather comprises the following steps:
step one, backwater standing:
placing the leather embryo into a rotary drum for backwater, draining, standing to obtain backwater leather embryo, wherein the following components in percentage by weight are added in the backwater process: 80-90% of water and 12-17% of rewetting oil;
step two, beating the drum and vibrating for softening
Performing drum throwing on the backwater leather blank obtained in the step one, and vibrating and softening the backwater leather blank to obtain vibrating and softening leather, so that the leather blank is in a flat state, wherein the drum throwing time is 0.5-1.5 hours;
step three, spraying a first bottom coating:
spraying a first bottom coating on the vibration soft leather obtained in the step two for 2-4 times to obtain a first bottom coating material;
step four, spraying a second bottom coating, repairing the flaw and standing:
spraying a second bottom coating on the first bottom-coated leather obtained in the step three, repairing the leather sprayed with the second bottom coating, and standing to obtain a second bottom-coated leather, wherein the standing time is 3-5 hours;
step five, polishing and roll finishing:
sequentially polishing and roll finishing the second bottom coating leather obtained in the step four to obtain roll finishing leather, wherein the roll finishing temperature is 100-110 ℃, and the roll finishing pressure is 19-23 kg;
step six, spraying the coating:
spraying paint on the roll-finished leather obtained in the fifth step to obtain sprayed leather;
step seven, rolling surface oil:
rolling surface oil on the sprayed leather obtained in the sixth step to obtain a rolled oil leather material;
step eight, drying:
and drying the rolling oil leather material obtained in the seventh step to obtain the crazy horse leather, wherein the drying temperature is 75-85 ℃, and the drying time is 0.5-1.5 h.
2. The crazy horse leather as claimed in claim 1, wherein in the water returning process of the first step, the following components are added according to the weight percentage of the leather embryo: 85% of water and 15% of rewetting oil.
3. The crazy horse leather as claimed in claim 1, wherein the drum-throwing time of the second step is 1 h.
4. The crazy horse leather as set forth in claim 1, wherein the first base coat of the third step comprises the following components in weight percent of the leather blank: 300% of water, 100% of water-based oil wax and 100% of penetrating agent.
5. The crazy horse leather according to claim 1, wherein the rest time of step four is 4 hours; the second base coat comprises the following components in percentage by weight of the blank: 20% of surfactant.
6. The crazy horse leather as claimed in claim 1, wherein the tumbling temperature of the step five is 105 ℃ and the tumbling pressure is 20 kg.
7. The crazy horse leather as claimed in claim 1, wherein the drying temperature is 80 ℃ and the drying time is 1h in step eight.
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| CN201710948123.1A CN107699644B (en) | 2017-10-12 | 2017-10-12 | Crazy horse leather and its preparing process |
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| CN201710948123.1A CN107699644B (en) | 2017-10-12 | 2017-10-12 | Crazy horse leather and its preparing process |
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| CN107699644B true CN107699644B (en) | 2020-04-17 |
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| CN109576420A (en) * | 2018-10-16 | 2019-04-05 | 兴业皮革科技股份有限公司 | A kind of leather repairing method |
| CN112626879A (en) * | 2020-12-30 | 2021-04-09 | 东莞市天熠新材料科技股份有限公司 | Method for manufacturing super-soft recycled bovine fiber skin embryo |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531920A (en) * | 2014-12-31 | 2015-04-22 | 东莞市天逸皮业有限公司 | Preparing method for pearlescent leather |
| CN104532598A (en) * | 2014-12-31 | 2015-04-22 | 东莞市天逸皮业有限公司 | Preparation method for washed leather |
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- 2017-10-12 CN CN201710948123.1A patent/CN107699644B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104531920A (en) * | 2014-12-31 | 2015-04-22 | 东莞市天逸皮业有限公司 | Preparing method for pearlescent leather |
| CN104532598A (en) * | 2014-12-31 | 2015-04-22 | 东莞市天逸皮业有限公司 | Preparation method for washed leather |
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