CN105133398A - Simple cow split leather color changing technology - Google Patents
Simple cow split leather color changing technology Download PDFInfo
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- CN105133398A CN105133398A CN201510534017.XA CN201510534017A CN105133398A CN 105133398 A CN105133398 A CN 105133398A CN 201510534017 A CN201510534017 A CN 201510534017A CN 105133398 A CN105133398 A CN 105133398A
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- rotary drum
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Abstract
The invention discloses a simple cow split leather color changing technology which comprises the steps of cow split leather weighing, water returning, decolorization, retanning, dyeing, liquid expansion, color fixation and emergence and stacking. The raw materials are semi-finished leather blanks, scientific processing is carried out, technological parameters are reasonably controlled, the decoloration degree of the leather blanks is high, the cow split leather is bright and uniform in color, soft and comfortable after dyeing is carried out again, a leather board is solid, and no adverse influence is produced on the fiber strength. By carrying out decolorization and retanning on the semi-finished cow split leather blanks, the leather blanks can be recolored again, and the product is non-toxic and environmentally friendly. The simple two-layer cow leather color changing technology can be applied to secondary production of leather, a new path is developed for secondary utilization of the leather blanks, the flexibility and safety of business operation can be greatly improved, and the economic benefits and social benefits are remarkable.
Description
Technical field
The present invention relates to leather-making technology technical field, more specifically relate to a kind of two layers of ox-hide of simplifying and to change colour technique.
Background technology
China's leather industry has become the pillar industry of light industry through the fast development of decades, and China also becomes the first in the world tanning production and trade base simultaneously.But international market is unexpectedly changing, domestic leather industry is comparatively large by the impact of international economic situation, and financial crisis disturbance is not put down, many tanneries because of customer order cancel, stock and being inflicted heavy losses on.To eliminate stock, tackling turn of the market calmly, the leather base dyeed must being processed again, make its reintroduction.And the matter of utmost importance now occurred is exactly need to carry out good desolventing technology to half-finished leather base.Technique of fading in the past because cost is higher, complicated operation, rarely have leather-making enterprises to adopt on defects such as resultant leather quality impact are larger.
Determine in leather production that the workshop section of finished leather style is dressing workshop section, and use before leather billet state can be reduced to dyeing process by this technique of changing colour, neither need newly added equipment, also without the need to adjusting plant layout, production process can be made to be become " reversible " from " irreversible ", thering is provided remedial measure for producing, can the loss brought because of production schedule variation be dropped to minimum, greatly improve flexibility and the security of enterprise operation.
The secondary that the present invention can also be applied to leather is produced, more by disability, lower grade, or the first layer leather of stock changes second layer leather into and re-starts retanning and produce.By a large amount of experimental verifications, this technique materials are few, fading extent is high, operation controls simple, and the skin base full color again dyeed is even, soft, and finished leather is plentiful, flexible, and quality is good.After testing, adopt originally change colour explained hereafter two layers of ox-hide every physical and mechanical properties index with change colour before basically identical, illustrate that technique of originally changing colour has no adverse effects to kraft fibers intensity.
The present invention tannery particularly trade have broad application prospects in area frequently.
Summary of the invention
The object of the invention is the problems referred to above being to exist for prior art, a kind of two layers of ox-hide of simplifying are provided to change colour technique, this PROCESS FOR TREATMENT is used to remove from office base, fully can decolour to it, materials are few, fading extent is high, operation controls simple, the skin base full color again dyeed, soft, finished leather is plentiful, flexible, and quality is good.The secondary being conducive to removing from office base utilizes.
Above-mentioned purpose of the present invention is achieved through the following technical solutions:
Step 1, second layer leather base to be weighed, as water in subsequent handling and other raw material addition according to (below all by the weight percent meter of second layer leather base).Throw second layer leather base and enter rotary drum, then enter step 2.
Step 2, backwater
Add 45 ~ 55 DEG C of hot water of 250 ~ 300% second layer leather base weight to rotary drum, rotary drum adjustment of rotational speed is 7 ~ 9rad/min, rotates 70 ~ 110min, discharge opeing.
Step 3, decolouring
The hot water of 50 ~ 60 DEG C adding 150 ~ 200% second layer leather base weight, to rotary drum, then adds the sodium carbonate of 2 ~ 3% second layer leather base weight, the sodium dithionite of 4 ~ 6% second layer leather base weight, rotary drum adjustment of rotational speed is 9 ~ 11rad/min, desolventing technology 40 ~ 60min, is washed to clean loose colour, discharge opeing.
Step 4, retanning
Add the hot water of 30 ~ 40 DEG C of 100 ~ 150% second layer leather base weight to rotary drum, then the polyacrylic acid of 2 ~ 3% second layer leather base weight is added, rotate 20 ~ 30min, rotating speed 9 ~ 11rad/min, the filled-type retanning agent adding 2 ~ 4% second layer leather base weight again (can select Sichuan Ting Jiang new material limited company, model: modified tannin extract (the Sichuan Ting Jiang new material limited company of 789) and 2 ~ 3% second layer leather base weight, model: 228), rotary drum adjustment of rotational speed is 12rad/min, carries out reaction 30 ~ 40min.
Step 5, dyeing
In rotary drum, add dyestuff (requiring to determine dye formulation and consumption, without azo dyes according to finished color), rotary drum adjustment of rotational speed is 10 ~ 14rad/min, dyeing process 40 ~ 60min.
Step 6, expansion liquid
The hot water of 65 ~ 75 DEG C of 180% ~ 220% second layer leather base weight is added in rotary drum.
Step 7, fixing
Formic acid weight is 2 ~ 3% second layer leather base weight, formic acid: water is 1:(9 ~ 11 according to weight ratio) make formic acid solution, formic acid solution is divided into two parts, adds rotary drum at twice, and rotary drum adjustment of rotational speed is 8 ~ 12rad/min, each fixation 15 ~ 30min.Namely first part of formic acid solution adds rear interval 15 ~ 30min and adds second part of formic acid solution, then reacts 15 ~ 30min.
Step 8, go out drum take horse
Go out drum, take horse, leave standstill more than 12h.
The present invention compared with prior art, has the following advantages:
1, raw material of the present invention is semi-finished product leather base, is processed, conservative control technological parameter, make the bleaching level of leather base high by science, again evenly beautiful in colour after dyeing, soft comfortable, and dermatotome is solid, has no adverse effects to fibre strength; Product is suitable as the uses such as furniture leather, upper leather, bag leather.
2, the invention provides a kind of two layers of ox-hide of simplifying to change colour technique, by decolouring to semi-finished product second layer leather base, retanning process, leather base can be made again to paint, product asepsis environment-protecting; The secondary that the present invention can also be applied to leather is produced, and more by disability, junior first layer leather changes second layer leather into and re-starts retanning operation.By a large amount of experimental verifications, uniform color after this technique materials are few, bleaching level is high, operation controls simply, skin base dyes again, finished leather is plentiful, flexible, soft, and quality is good.
3, the present invention is that the secondary utilization of removing from office base opens a new way, greatly can strengthen flexibility and the security of enterprise operation, have significant economic benefit and social benefit.
Detailed description of the invention
Below technical scheme of the present invention is described in further detail.
embodiment 1
Step 1, second layer leather base to be weighed, as water in subsequent handling and other raw material addition according to (below all by the weight percent meter of second layer leather base).Throw second layer leather base and enter rotary drum, then enter step 2.
Step 2, backwater
Add 45 DEG C of hot water of 300% second layer leather base weight to rotary drum, rotary drum adjustment of rotational speed is 8rad/min, rotates 90min, discharge opeing.
Step 3, decolouring
The hot water of 50 DEG C adding 200% second layer leather base weight, to rotary drum, then adds the sodium carbonate of the second layer leather base weight of 3% second layer leather base weight, the sodium dithionite of 6% second layer leather base weight, rotary drum adjustment of rotational speed is 10rad/min, desolventing technology 60min, is washed to clean loose colour, discharge opeing.
Step 4, retanning
Add the hot water of 30 DEG C of 150% second layer leather base weight to rotary drum, then add 3% second layer leather base weight polyacrylic acid, rotate 30min, keep rotating speed 10rad/min, add again the second layer leather base weight of 4% filled-type retanning agent (Sichuan Ting Jiang new material limited company can be selected, model: 789) and 3% second layer leather base weight modified tannin extract (Sichuan Ting Jiang new material limited company, model: 228), rotary drum adjustment of rotational speed is 12rad/min, carries out reaction 40min.
Step 5, dyeing
In rotary drum, add the black dyes (leather black ND(Tianjin victory Da Ruitai Chemical Co., Ltd.) of 2% second layer leather base weight, rotary drum adjustment of rotational speed is 12r/min, and dyeing process 60min, checks whether imbue.
Step 6, expansion liquid
The hot water of 65 DEG C of 200% second layer leather base weight is added in rotary drum.
Step 7, fixing
Formic acid weight is 3% second layer leather base weight, formic acid: water is that 1:10 makes formic acid solution according to weight ratio, and formic acid solution is divided into two parts, adds rotary drum at twice, and rotary drum adjustment of rotational speed is 10r/min, each fixation 30min.
Step 8, go out drum take horse
Go out drum, take horse, leave standstill 12h.
embodiment 2
Step 1, second layer leather base to be weighed, as water in subsequent handling and other raw material addition according to (below all by the weight percent meter of second layer leather base).Throw second layer leather base and enter rotary drum, then enter step 2.
Step 2, backwater
Add 55 DEG C of hot water of 250% second layer leather base weight to rotary drum, rotary drum adjustment of rotational speed is 8rad/min, rotates 90min, discharge opeing.
Step 3, decolouring
The hot water of 60 DEG C adding 150% second layer leather base weight, to rotary drum, then adds the sodium carbonate of 2% second layer leather base weight, the sodium dithionite of 4% second layer leather base weight, and rotary drum adjustment of rotational speed is 10rad/min, and desolventing technology 60min is washed to clean loose colour, discharge opeing.
Step 4, retanning
Add the hot water of 40 DEG C of 100% second layer leather base weight to rotary drum, then the polyacrylic acid of 2% second layer leather base weight is added, rotate 20min, adjustment of rotational speed is 11rad/min, then the filled-type retanning agent adding 2% second layer leather base weight (can select Sichuan Ting Jiang new material limited company, model: modified tannin extract (the Sichuan Ting Jiang new material limited company of 789) and 2% second layer leather base weight, model: 228), rotary drum adjustment of rotational speed is 12rad/min, carries out reaction 30min.
Step 5, dyeing
The dark-brown dyestuff (dark brown MM(Tianjin victory Da Ruitai Chemical Co., Ltd.) of 3% second layer leather base weight is added in rotary drum), rotary drum adjustment of rotational speed is 12r/min, and dyeing process 40min, checks whether imbue.
Step 6, expansion liquid
The hot water of 75 DEG C of 200% second layer leather base weight is added in rotary drum.
Step 7, fixing
Formic acid weight is 2% second layer leather base weight, formic acid: water is that 1:10 makes formic acid solution according to weight ratio, and formic acid solution is divided into two parts, adds rotary drum at twice, and rotary drum adjustment of rotational speed is 10r/min, each fixation 20min.
Step 8, go out drum take horse
Go out drum, take horse, leave standstill 12h.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (1)
1. two layers of ox-hide of simplifying change colour a technique, it is characterized in that, comprise the following steps:
Step 1, second layer leather base to be weighed, throw second layer leather base and enter rotary drum;
Step 2, add 45 ~ 55 DEG C of hot water of 250 ~ 300% second layer leather base weight to rotary drum, rotary drum adjustment of rotational speed is 7 ~ 9rad/min, rotates 70 ~ 110min, discharge opeing;
Step 3, add the hot water of 50 ~ 60 DEG C of 150 ~ 200% second layer leather base weight to rotary drum, then the sodium carbonate of 2 ~ 3% second layer leather base weight is added, the sodium dithionite of 4 ~ 6% second layer leather base weight, rotary drum adjustment of rotational speed is 9 ~ 11rad/min, desolventing technology 40 ~ 60min, be washed to clean loose colour, discharge opeing;
Step 4, add the hot water of 30 ~ 40 DEG C of 100 ~ 150% second layer leather base weight to rotary drum, then the polyacrylic acid of 2 ~ 3% second layer leather base weight is added, rotate 20 ~ 30min, rotating speed 9 ~ 11rad/min, add the filled-type retanning agent of 2 ~ 4% second layer leather base weight and the modified tannin extract of 2 ~ 3% second layer leather base weight again, rotary drum adjustment of rotational speed is 12rad/min, carries out reaction 30 ~ 40min;
Step 5, in rotary drum, add dyestuff, rotary drum adjustment of rotational speed is 10 ~ 14rad/min, dyeing process 40 ~ 60min;
Step 6, in rotary drum, add the hot water of 65 ~ 75 DEG C of 180% ~ 220% second layer leather base weight;
Step 7, formic acid weight are 2 ~ 3% second layer leather base weight, formic acid: water is that 1:9 ~ 11 make formic acid solution according to weight ratio, formic acid solution is divided into two parts, rotary drum adjustment of rotational speed is 8 ~ 12rad/min, first part of formic acid solution adds rear interval 15 ~ 30min and adds second part of formic acid solution, then reacts 15 ~ 30min;
Step 8, go out drum, take horse, leave standstill more than 12h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510534017.XA CN105133398B (en) | 2015-08-27 | 2015-08-27 | A kind of two layers of ox-hide simplified change colour technique |
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| CN201510534017.XA CN105133398B (en) | 2015-08-27 | 2015-08-27 | A kind of two layers of ox-hide simplified change colour technique |
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| CN105133398B CN105133398B (en) | 2017-06-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287365A (en) * | 2017-07-31 | 2017-10-24 | 漳州香洲皮革有限公司 | The preparation technology of strong force of explosion double-layer leather |
| CN109576415A (en) * | 2018-12-28 | 2019-04-05 | 北京泛博科技有限责任公司 | A kind of method that fur leather fades and changes colour |
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| CN103485212A (en) * | 2013-09-04 | 2014-01-01 | 北京泛博化学股份有限公司 | Stripping agent, preparation method thereof and method for stripping by utilizing stripping agent |
| CN103834751A (en) * | 2012-11-21 | 2014-06-04 | 中牛集团有限公司 | Non-chrome tanned wet-white leather making technology |
| CN104264517A (en) * | 2014-10-13 | 2015-01-07 | 北京泛博化学股份有限公司 | Bicolored dyeing method for rabbit fur |
| 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 |
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2015
- 2015-08-27 CN CN201510534017.XA patent/CN105133398B/en active Active
Patent Citations (7)
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| NZ518614A (en) * | 2001-05-04 | 2003-07-25 | Rohm & Haas | Method for whitening animal skins |
| CN102676710A (en) * | 2012-05-29 | 2012-09-19 | 济南鲁日钧达皮革有限公司 | Method for preparing cleaned three-proofing cow split leather and prepared cleaned three-proofing cow split leather |
| CN103834751A (en) * | 2012-11-21 | 2014-06-04 | 中牛集团有限公司 | Non-chrome tanned wet-white leather making technology |
| CN103060488A (en) * | 2012-12-26 | 2013-04-24 | 四川亭江新材料股份有限公司 | Environment-friendly type crust leather production method |
| CN103485212A (en) * | 2013-09-04 | 2014-01-01 | 北京泛博化学股份有限公司 | Stripping agent, preparation method thereof and method for stripping by utilizing stripping agent |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107287365A (en) * | 2017-07-31 | 2017-10-24 | 漳州香洲皮革有限公司 | The preparation technology of strong force of explosion double-layer leather |
| CN109576415A (en) * | 2018-12-28 | 2019-04-05 | 北京泛博科技有限责任公司 | A kind of method that fur leather fades and changes colour |
| CN109576415B (en) * | 2018-12-28 | 2021-05-18 | 北京泛博科技有限责任公司 | Method for fading and changing colors of leather |
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| CN105133398B (en) | 2017-06-09 |
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