CN102181587A - Method for combining and tanning THP salt-Laponite - Google Patents
Method for combining and tanning THP salt-Laponite Download PDFInfo
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- CN102181587A CN102181587A CN2011100797763A CN201110079776A CN102181587A CN 102181587 A CN102181587 A CN 102181587A CN 2011100797763 A CN2011100797763 A CN 2011100797763A CN 201110079776 A CN201110079776 A CN 201110079776A CN 102181587 A CN102181587 A CN 102181587A
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- laponite
- salt
- tanning
- thp
- thp salt
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Abstract
The invention discloses a method for combining and tanning THP salt and Laponite. The method includes the following steps: firstly, adding softened skin and water with the mass rate of 0.5-1:1 to a drum; then adding a certain quantity of table salt and methane acid pickle until the pH of bath foam ranges between 3.0-3.5 and keeping the state for 30min; then adding THP salt and stirring for 3-5h, adding sodium acetate or sodium bicarbonate solution until the pH of the bath foam ranges between 5.0-5.5, adding Laponite, continually stirring for reaction for 3-5h and keeping the mixture still over night; and on the second day stirring and washing the mixture. The method can effectively raise the heat denaturation temperature of leather up to over 87 DEG C by combination and tanning of THP and Laponite, and can also greatly improve the mechanical property of leather. Due to the advantages of unique layered sheet nanostructure, small grain size, no toxicity, nonflammable property, no yellowing and the like, the added Laponite has an outstanding coordinating effect in combination with THP salt for tanning, gives leather high moist heat stability, improves the mechanical property of leather and enables leather to have certain physical and chemical characteristics specific to nanometer composite materials. Meanwhile, not containing heavy metal salt such as chromium salt, the THP salt and Laponite are environment-friendly materials. The tanning process is a clean leather working technology.
Description
Technical field
The present invention relates to a kind of process for tanning of leather, be specifically related to the method for THP salt and Laponite combination tanned leather.
Background technology
Since 19 end of the centurys, chromic tanning occurred, chromic tanning is strong with the moisture-proof thermostability that it saves time, economy and chrome tanned leather have, physical strength is high, dyeing behavior good, soft plurality of advantages such as plentiful obtains process hides circle and admits widely, in the last hundred years dominate in the production of light leather always.Yet along with becoming increasingly conspicuous of resource, environmental problem, the particularly people fear to the sexavalent chrome carinogenicity, no chromic tanning has become in recent years the focus of research both at home and abroad.Therefore, develop environmentally safe, can satisfy the novel tanning agent and the tannage thereof of finished leather demand again, become a key of process hides cleaner production development.
THP salt is a kind of organic tanning agent of can biological degradation, having flame retardant resistance, its chemistry tetra methylol quaternary alkylphosphonium salt by name, and chemical formula is C
4H
12O
4P mainly contains tetra methylol phosphonium chloride (THPC) and two kinds of forms of tetra methylol phosphine sulfide (THPS).Finished leather good hand feeling, the softness of the tanning of THP salt, color is light, be usually used in producing the sheep clothing leather, but the tanned leather shrinkage temperature of THP salt is not high enough separately, therefore, organic phosphine is mainly used in combining of other synthetic tanning agent and tans, the research report that combinations such as existing THP salt-amine tanning agent, THP salt-resin tanning agent, THP salt-vegatable tannin, THP salt-Resorcinol are tanned.
Laponite is that a class is by 2: 1 layered silicate hectorites of inorganic salt synthetic class nano silicate powder, the ideal crystalline structure is that one of two silicon-oxy tetrahedron sandwich are at the magnesia octahedron, the divalence magnesium atom of part is replaced by the univalent lithium atom, makes sheet surfaces have negative charge.The Laponite size of particles is little, easily is dispersed in the transparent solution of formation in the water, and laser light scattering (LLS) technology records nano particle diameter and concentrates on ~ 20nm, and empirical formula is Na
+ 0.7[Si
8(Mg
5.5Li
0.3) O
20(OH)
4]
-0.7There is different valency isomorphous replacement in the intracell of Laponite, has destroyed charge balance, forms potential difference and electronegativity adsorption center, thereby has the ability of absorption positively charged ion polar organic molecule at interlayer and structural unit laminar surface.
To sum up, this patent uses quaternary alkylphosphonium salt (promptly, THP salt) with the Laponite combination tanned leather, test-results shows: THP salt and Laponite combination tanned leather, can give leather high heat stability, improve the mechanical property of leather, can make it to have the physics and the chemical property of nano material uniqueness again.And Laponite and THP salt all is environment-friendly material, and readily biodegradable meets the requirement that cleans process hides fully.In addition, the synthetic technology of Laponite is very ripe, the simple and stable performance of technology, and low price has the good prospect of marketing.
The invention provides a kind of method of THP salt Laponite combination tanned leather, this method can improve more than the thermal denaturation temperature to 87 ℃ of leather, improved simultaneously the mechanical property of leather significantly, and present method yet there are no pertinent literature and patent report at home and abroad.
Summary of the invention
Defective when the objective of the invention is to overcome THP and being used for tanning agent separately, a kind of method of THP salt Laponite combination tanned leather is provided, with this method tanning leatherware later higher thermal denaturation temperature and favorable mechanical performance are arranged, because two kinds of materials all are environmentally friendly materials, therefore, cost is reduced.
For achieving the above object, the technical solution used in the present invention comprises pickling, tanning, and the addition of additive is a benchmark with the quality of softening skin in each operation, and concrete operation method is as follows:
1) pickling: the softening Pi Yushui for (0.5 ~ 1) 1 joins in the rotary drum with mass ratio, adds 6% ~ 8% NaCl, rotates 20min, adds the first acid for adjusting pH value then between 3.0 ~ 3.5, rotates 30min;
2) tanning: in above-mentioned pickling liquid, add 0.5% ~ 5% THP salt, stir 3 ~ 5h; The pH value that adds sodium-acetate or saleratus solution adjusting tanning body lotion is 5.0 ~ 5.5; Add 0.5% ~ 10% Laponite then, change 3 ~ 5h, standing over night then.Stir the 30min after washing next day.
In above-mentioned tanning step: described THP salt is any one or any two kinds in tetra methylol phosphonium chloride (THPC) or the tetra methylol phosphine sulfide (THPS); The consumption of described THP salt is 0.5% ~ 5% of softening tare weight.
Described Laponite, its size is 1 ~ 100nm; The consumption of described Laponite is 0.5% ~ 10% of softening tare weight.
Adopt process for tanning of the present invention that the thermal denaturation temperature of skin is reached more than 87 ℃, and the mechanical property of leather is greatly improved.
Embodiment
Provide four embodiment of the present invention below, to specify a kind of method of THP salt Laponite combination tanned leather.
Embodiment 1
1) pickling: with mass ratio is that 0.5 1 softening Pi Yushui joins in the rotary drum, adds 6% NaCl, rotates 20min, and adding the first acid for adjusting pH value then is 3.3, rotates 30min;
2) tanning: in above-mentioned pickling liquid, add 2% THP salt, stir 3h; The pH value that adds saleratus solution adjusting tanning body lotion is 5.0; Add 5% Laponite then, change 3.5h, standing over night then.Stir the 30min after washing next day.
Embodiment 2
1) pickling: with mass ratio is that 0.8 1 softening Pi Yushui joins in the rotary drum, adds 6.5% NaCl, rotates 20min, and adding the first acid for adjusting pH value then is 3.3, rotates 30min;
2) tanning: in above-mentioned pickling liquid, add 2.5% THP salt, stir 3.5h; The pH value that adds saleratus solution adjusting tanning body lotion is 5.2; Add 3% Laponite then, change 3.5h, standing over night then.Stir the 30min after washing next day.
Embodiment 3
1) pickling: with mass ratio is that 0.6 1 softening Pi Yushui joins in the rotary drum, adds 6% NaCl, rotates 20min, and adding the first acid for adjusting pH value then is 3.3, rotates 30min;
2) tanning: in above-mentioned pickling liquid, add 1% THP salt, stir 2.5h; The pH value that adds sodium acetate soln adjusting tanning body lotion is 5.0; Add 6% Laponite then, change 5h, standing over night then.Stir the 30min after washing next day.
Embodiment 4
1) pickling: with mass ratio is that 0.5 1 softening Pi Yushui joins in the rotary drum, adds 6% NaCl, rotates 20min, and adding the first acid for adjusting pH value then is 3.3, rotates 30min;
2) tanning: in above-mentioned pickling liquid, add 3.5% THP salt, stir 4h; The pH value that adds saleratus solution adjusting tanning body lotion is 5.5; Add 5% Laponite then, change 4h, standing over night then.Stir the 30min after washing next day.
Claims (5)
1.THP the method for salt Laponite combination tanned leather is characterized in that working method comprises pickling, tanning, the addition of additive is a benchmark with softening cortex amount in each operation, and concrete operation method is as follows:
1) pickling: the softening Pi Yushui for (0.5 ~ 1) 1 joins in the rotary drum with mass ratio, adds 6% ~ 8% NaCl, rotates 20min, adds the first acid for adjusting pH value then between 3.0 ~ 3.5, rotates 30min;
2) tanning: in above-mentioned pickling liquid, add 0.5% ~ 5% THP salt, stir 3 ~ 5h; The pH value that adds sodium-acetate or saleratus solution adjusting tanning body lotion is 5.0 ~ 5.5; Add 0.5% ~ 10% Laponite then, change 3 ~ 5h, standing over night stirs the 30min after washing next day then.
2. the method for THP salt Laponite combination tanned leather according to claim 1, it is characterized in that: described Laponite is that a kind of synthetic contains magnesium, lithium nano silicate powder, and the nano particle diameter size is 1 ~ 100nm, nontoxic, high temperature resistant, be a kind of environmental friendliness nano material.
3. the method for THP salt Laponite combination tanned leather according to claim 1 is characterized in that: the consumption of described Laponite is 0.5% ~ 10% of softening tare weight.
4. the method for THP salt Laponite combination tanned leather according to claim 1 is characterized in that: described THP salt is any one or two kinds in tetra methylol phosphonium chloride (THPC) or the tetra methylol phosphine sulfide (THPS).
5. the method for THP salt Laponite combination tanned leather according to claim 1 is characterized in that: the consumption of described THP salt is 0.5% ~ 5% of softening tare weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100797763A CN102181587A (en) | 2011-03-31 | 2011-03-31 | Method for combining and tanning THP salt-Laponite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100797763A CN102181587A (en) | 2011-03-31 | 2011-03-31 | Method for combining and tanning THP salt-Laponite |
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| Publication Number | Publication Date |
|---|---|
| CN102181587A true CN102181587A (en) | 2011-09-14 |
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|---|---|---|---|
| CN2011100797763A Pending CN102181587A (en) | 2011-03-31 | 2011-03-31 | Method for combining and tanning THP salt-Laponite |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602763A (en) * | 2013-11-13 | 2014-02-26 | 四川大学 | Organic-nano-silicate composite tanning agent with lamellae structure and tanning method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060137101A1 (en) * | 2004-12-23 | 2006-06-29 | Council Of Scientific And Industrial Research | Process for making wet-pink leather |
| CN101182589A (en) * | 2007-11-16 | 2008-05-21 | 陕西科技大学 | Method of THP and multi-amino-compounds combining tanning leather |
| CN101696456A (en) * | 2009-10-23 | 2010-04-21 | 四川大学 | Method for raising thermal denaturation temperature of hide and hide powder through THP salt-nano clay combination tannage |
| CN101932641A (en) * | 2008-01-30 | 2010-12-29 | 昭和电工株式会社 | Transparent composite |
-
2011
- 2011-03-31 CN CN2011100797763A patent/CN102181587A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060137101A1 (en) * | 2004-12-23 | 2006-06-29 | Council Of Scientific And Industrial Research | Process for making wet-pink leather |
| CN101182589A (en) * | 2007-11-16 | 2008-05-21 | 陕西科技大学 | Method of THP and multi-amino-compounds combining tanning leather |
| CN101932641A (en) * | 2008-01-30 | 2010-12-29 | 昭和电工株式会社 | Transparent composite |
| CN101696456A (en) * | 2009-10-23 | 2010-04-21 | 四川大学 | Method for raising thermal denaturation temperature of hide and hide powder through THP salt-nano clay combination tannage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103602763A (en) * | 2013-11-13 | 2014-02-26 | 四川大学 | Organic-nano-silicate composite tanning agent with lamellae structure and tanning method thereof |
| CN103602763B (en) * | 2013-11-13 | 2015-08-05 | 四川大学 | A kind of have lamellar structure organic-nano silicate composite tanning agent and tannage thereof |
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Application publication date: 20110914 |