CN106245371A - A kind of chitin sodium chloride acid stain levelling agent - Google Patents
A kind of chitin sodium chloride acid stain levelling agent Download PDFInfo
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- CN106245371A CN106245371A CN201610680828.5A CN201610680828A CN106245371A CN 106245371 A CN106245371 A CN 106245371A CN 201610680828 A CN201610680828 A CN 201610680828A CN 106245371 A CN106245371 A CN 106245371A
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- chitin
- sodium chloride
- levelling agent
- acid stain
- water
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/39—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using acid dyes
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/46—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing natural macromolecular substances or derivatives thereof
- D06P1/48—Derivatives of carbohydrates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
- D06P1/673—Inorganic compounds
- D06P1/67333—Salts or hydroxides
- D06P1/6735—Salts or hydroxides of alkaline or alkaline-earth metals with anions different from those provided for in D06P1/67341
- D06P1/67358—Halides or oxyhalides
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/14—Wool
- D06P3/16—Wool using acid dyes
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Cosmetics (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a kind of chitin sodium chloride acid stain levelling agent, mixed with sodium chloride by chitin and form, its preparation method includes the first step: be to slowly warm up to 50 55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 10 15 minutes, second step: water-bath is warming up to 90 95 DEG C after terminating, be slowly added dropwise sodium-chloride water solution and be stirred continuously；3rd step: after sodium-chloride water solution dropping mixture is cooled to rapidly 20 DEG C and carries out lyophilization and obtain chitin sodium chloride acid stain levelling agent.Chitin of the present invention serves collaborative effect with the immixture of sodium chloride, is applied to acid stain and Pilus Caprae seu Ovis carries out having in dyeing course splendid even dyeing effect, give the bacteriostasis antibiosis that fabric is good simultaneously；Preparation simplicity, natural environmental-protective is nontoxic, has broad application prospects.
Description
Technical field:
The invention belongs to textile auxiliary applied technical field, be specifically related to a kind of acid stain levelling agent
Background technology:
Acid stain refers to that a class carries out the dyestuff dyeed in acid medium.Acid stain presses its chemical constitution and dyeing
The difference of condition is divided into highly acid, faintly acid, acidic intermedium, acidic complex dye etc..Acid stain chromatograph is complete, and color and luster is fresh
Gorgeous, light fastness and wet colour fastness are different and differ greatly with dye species.Compare with direct dyes, the letter of acid stain structure
Single, lack longer the most often double bond and coplanarity structure, so cellulose fibre is lacked substantivity, it is impossible to for cellulose
The dyeing of fiber.Different types of acid stain, owing to molecular structure is different, thus their dyeability is the most different, is adopted
Colouring method the most different.
Highly acid dyestuff is a kind of acid stain grown up the earliest, it is desirable to dye in stronger acid dye bath, its
Molecular structure is simple, and molecular weight is low, and containing sulfonic group or carboxyl, little to Pilus Caprae seu Ovis affinity, on Pilus Caprae seu Ovis, the even shifting of energy, contaminates all
Even, therefore also referred to as acid levelling colour, but coloured light is not deep, and fastness to washing is poor, and has damage, the Pilus Caprae seu Ovis after dye during dyeing to Pilus Caprae seu Ovis
Feel is poor.Weak acid dye in highly acid dyestuff by increasing molecular weight, introducing the virtue group such as sulfuryl or introduce Long carbon chain
Weak acid dye is i.e. generated etc. method.Molecular structure is more complicated, relatively big to Pilus Caprae seu Ovis affinity, can contaminate sheep in weak acidic medium
Hair, to Pilus Caprae seu Ovis not damaged, coloured light is relatively deep, and fastness increases, but not level dyeing.
Chitin (C8H13O5N) n, also known as chitin, chitin, English name Chitin.French scholar Bu Lake in 1811
Promise (Braconno) finds, within 1823, is extracted from crustacean shell by Ou Jier (Odier).The water absorption rate of chitin is up to
1300%, the chitin of 1 gram can reach 13 grams after being saturated with water；Chitin has natural bacteriostatic effect, and broad-spectrum antiseptic rate is very
Height, the common bacteria of more than 90% can not be survived on chitin fiber；Therefore the fiber such as chitin fiber and coloured silk cotton goods cotton textiles
The fabric made is particularly suitable for makeing infant clothing and men and women's top grade underwear.
Chitosan, when woolen dyed, can stop the gathering of dye molecule or competing dye in dye bath, makes dye molecule delay
Slow upper dyeing wool fiber, thus play preferable level dyeing, slow dye effect.Wool fiber is had the most affine by chitosan simultaneously
Power, slowly releases ammonia and hydrogen evolution ammonium ion in dyeing course, has newly increased upper dye seat, improve dye uptake,
Become by slow dye and help dye.The Pilus Caprae seu Ovis crossed through treatment with chitosan to the absorbance of dyestuff than untreated Pilus Caprae seu Ovis height 1.3%-
41.3%.The addition of chitosan can also make the soaping fastness of dyeing wool fabric, not staining fastness and perspiration fastness improve half grade
Above, color and luster the most substantially increases.Bafta with 0.5% chitosan liquid process after through reactive dyeing, increase deep effect non-
Chang Mingxian, dye uptake improves 1-3 times, and salt consumption can be reduced to about 50%.Through chitosan solution pretreatment
During bafta direct dyeing, dye-uptake can improve 20%-30%, and, immature fibre is formed by chitosan
Cotton knot has covering effect, thus eliminates the aberration phenomenon produced in dyeing process because maturity of cotton fiber is different.
Sodium chloride is used in the application of dye printing prescription in dye technology technical field, can improve the degree of fixation of dyestuff
Or for regulating the dyestuff dye-uptake for fiber, there is certain effect of color protection.Traditional experience is it also holds that by colored
After textile medicated clothing soaks a period of time in saline solution, then wash with detergent, be possible to prevent medicated clothing color impaired.Sodium chloride is also
May be used for the thickening aspect of liquid detergent, as a kind of conventional thickening agent, be also the most cheap one, sodium chloride for
The thickening power of liquid detergent is mainly by realizing with the cooperative effect of surfactant, and the existence of sodium chloride is permissible
The association number making micelle increases, and after reaching higher value, if continuing to increase the consumption of sodium chloride, then can compress the double of micellar surface
Electric layer thickness, destroys the band electroviscosity effect of surfactant, so that the viscosity of system reduces.
Summary of the invention:
It is an object of the invention to for problem of the prior art, it is provided that the levelling agent of a kind of novel simplicity, Pilus Caprae seu Ovis is entered by it
Row dyeing course has splendid even dyeing effect, gives the bacteriostasis antibiosis that fabric is good simultaneously；Preparation simplicity, natural environmental-protective
Nontoxic, have broad application prospects.
For achieving the above object, the present invention is by the following technical solutions:
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 5-7:1.
Preferably, this levelling agent chitin and sodium chloride mixed proportion are 6.5:1.
Preferably, its preparation method comprises the following steps:
The first step: be to slowly warm up to 50-55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 10-15
Minute；
Second step: water-bath is warming up to 90-95 DEG C after terminating, is slowly added dropwise sodium-chloride water solution and is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Preferably, in described second step, the mass concentration of sodium-chloride water solution is 10-12%.
Preferably, described chitin is water-soluble chitosan.
Preferably, deacetylation >=92% of described chitin, water content≤10.0%, the ash content of coal≤1.0%, viscous
Degree≤100mpa.s, arsenic (in terms of As) content≤0.5ppm, heavy metal (in terms of Pb) content≤10ppm.
Preferably, total number of bacterial colonies≤1000cfu/g, E. CoIi content≤30cfu/g in described chitin.
Sodium chloride is the most micro-hygroscopy.Stability is relatively good, be commercially used for manufacturing soda and Caustic soda and other
Chemical products, ore smelting, in life can be used for flavoring agent.Sodium chloride also has the most organic in articles for washing industry simultaneously
History, except being applied in the manufacturing process of soap, as one inexpensively and widely industrial chemicals, it is at articles for washing
In application more extensive, may be used for thickening, color fixative process and sterilization process.The present invention is by sodium chloride and carapace
Element is compounding to be used, and is applied the levelling agent as dyeing, utilizes its strong electrolyte performance, fine to Pilus Caprae seu Ovis at acid stain
During dimension dyes, the less inorganic anion of dye bath middle-molecular-weihydroxyethyl due to diffusion velocity greatly and first with in Pilus Caprae seu Ovis
Amino combine, be then combined substantial amounts of anion metathesis inorganic anion in levelling agent and the dye seat occupying in fiber,
Then acid stain anion is diffused into the inside of fiber slowly, and replaces levelling agent anion and be implemented in combination with fiber
The effect of level dyeing.Sodium chloride and chitin compound use, serve collaborative action potency, before having the most wide application
Scape.
The method have the advantages that
1. chitin serves collaborative effect with the immixture of sodium chloride, is applied to acid stain and contaminates Pilus Caprae seu Ovis
There is during color splendid even dyeing effect, give the bacteriostasis antibiosis that fabric is good simultaneously；Preparation simplicity, natural environmental-protective without
Poison, has broad application prospects.
2. the present invention uses compounding to sodium chloride and chitin, is applied the levelling agent as dyeing, utilizes it
Strong electrolyte performance, during wool fiber is dyeed by acid stain, the mineral acid that dye bath middle-molecular-weihydroxyethyl is less is cloudy
Due to diffusion velocity, the amino in Pilus Caprae seu Ovis greatly and first is combined ion, be then combined in levelling agent substantial amounts of anion metathesis without
Machine acid anion and occupy the dye seat in fiber, then acid stain anion is diffused into the inside of fiber slowly, and
Replace levelling agent anion and be implemented in combination with the effect of level dyeing with fiber.
Levelling agent preparation technology the most of the present invention is easy, and raw material is extensive and cheap, is a kind of preferably levelling agent, simultaneously
Have and do not change Shade of Dyed Textiles feature, do not reduce the feature of dyefastness.
Detailed description of the invention:
In order to be better understood from the present invention, below by embodiment, the present invention is further described, and embodiment is served only for solving
Release the present invention, the present invention will not be constituted any restriction.
Embodiment one
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 50 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 10 minutes；
Second step: water-bath is warming up to 90 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 10%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment two
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 7:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 15 minutes；
Second step: water-bath is warming up to 95 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 12%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment three
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 10 minutes；
Second step: water-bath is warming up to 95 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 10%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment four
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 7:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 50 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 15 minutes；
Second step: water-bath is warming up to 90 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 12%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment five
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 6.5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 50 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 10 minutes；
Second step: water-bath is warming up to 90 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 10%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment six
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 6.5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 15 minutes；
Second step: water-bath is warming up to 95 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 12%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment seven
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 6.5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 50 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 15 minutes；
Second step: water-bath is warming up to 90 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 12%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment eight
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 6.5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 10 minutes；
Second step: water-bath is warming up to 95 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 10%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment nine
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 6.5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 50 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 13 minutes；
Second step: water-bath is warming up to 95 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 11%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Embodiment ten
A kind of chitin-sodium chloride acid stain levelling agent, is mixed with sodium chloride by chitin and forms, both mixing
Ratio is 6.5:1.
Its preparation method comprises the following steps:
The first step: be to slowly warm up to 55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 12 minutes；
Second step: water-bath is warming up to 95 DEG C after terminating, be slowly added dropwise sodium-chloride water solution (mass concentration is 11%) and
It is stirred continuously；
3rd step: after sodium-chloride water solution dropping, mixture is cooled to rapidly-20 DEG C and carries out lyophilization
Obtain chitin-sodium chloride acid stain levelling agent.
Described chitin is water-soluble chitosan.
Deacetylation >=92% of described chitin, water content≤10.0%, the ash content of coal≤1.0%, viscosity≤
100mpa.s, arsenic (in terms of As) content≤0.5ppm, heavy metal (in terms of Pb) content≤10ppm, total number of bacterial colonies≤
1000cfu/g, E. CoIi content≤30cfu/g.
Dyeing prescription:
Dyestuff 1% (o.w.f)；Levelling agent 0.1g/L；PH:3；Bath raio: 40:1
Dyeing:
50 DEG C are added acid and dyestuff, wash after being warming up to 80 DEG C of insulations 30 minutes.
Dyefastness is tested
According to GB/T 3921-2008 standard, (textile color stability tests resistance to soap respectively for color fastness to washing and fastness to rubbing
Wash color fastness) and GB/T 3920-2008 standard (textile color stability test colour fastness to rubbing) test and evaluate.
The mensuration of migration property
Dyeing prescription: dyestuff 1% (o.w.f)；PH:3；Bath raio: 1:30
Shifting dye liquor: levelling agent 0.1g/L；PH:3；Bath raio: 1:30
According to dyeing prescription and dyeing operating curve, wool fabric is dyeed, the wool fabric after dyeing is divided
Into two, take wherein half to be used as to move the Pilus Caprae seu Ovis calico with same size of dying cloth and be stitched together and join the shifting dye liquor prepared
In, walk power curve according to dyeing and do shifting dye test, sampling, washing, be dried, comparison gray scale grading, compare wool white
Cloth and shifting dye cloth between the difference degree of color and luster.
Table one: embodiment of the present invention levelling agent affects result for migration property
Embodiment levelling agent is added equal for level-dyeing property and the migration property of dyestuff from table it will be seen that in dye bath
Reach higher level.
Table two: the embodiment levelling agent impact on disperse dyes color fastness
After using embodiment of the present invention levelling agent to use acid stain to carry out dyeing process wool fabric, do not interfere with it
Color fastness.Levelling agent of the present invention is respectively provided with good migration property to acid stain, and migration property has had bigger compared with blank group
Improving, this explanation levelling agent is during dyeing, and on cloth, the dyestuff of concentration side higher is combined, by this cloth cover
Dyestuff peel off so that cloth cover color reaches unanimity, reach the effect of level dyeing.Embodiment of the present invention levelling agent simultaneously
After interpolation, it is possible to decrease the foaming phenomena in dyeing course.
Claims (7)
1. chitin-sodium chloride acid stain levelling agent, it is characterised in that: mixed with sodium chloride by chitin and form,
Both mixed proportions are 5-7:1.
A kind of chitin-sodium chloride acid stain levelling agent the most according to claim 1, it is characterised in that: by carapace
Element mixes composition with sodium chloride, and both mixed proportions are 6.5:1.
A kind of chitin-sodium chloride acid stain levelling agent the most according to claim 1, it is characterised in that described even
The preparation method of stain comprises the following steps:
The first step: be to slowly warm up to 50-55 DEG C after being mixed according to mass ratio 1:1 with water by chitin, water bath with thermostatic control 10-15 divides
Clock；
Second step: water-bath is warming up to 90-95 DEG C after terminating, is slowly added dropwise sodium-chloride water solution and is stirred continuously；
3rd step: after sodium-chloride water solution dropping mixture is cooled to rapidly-20 DEG C and carries out lyophilization and obtain
Chitin-sodium chloride acid stain levelling agent.
A kind of chitin-sodium chloride acid stain levelling agent the most according to claim 3, it is characterised in that: described the
In two steps, the mass concentration of sodium-chloride water solution is 10-12%.
5. according to the chitin one of Claims 1-4 Suo Shu-sodium chloride acid stain levelling agent, it is characterised in that: described
Chitin is water-soluble chitosan.
6. according to the chitin one of Claims 1-4 Suo Shu-sodium chloride acid stain levelling agent, it is characterised in that: described
Deacetylation >=92% of chitin, water content≤10.0%, the ash content of coal≤1.0%, viscosity≤100mpa.s, arsenic (with
As counts) content≤0.5ppm, heavy metal (in terms of Pb) content≤10ppm.
7. according to the chitin one of Claims 1-4 Suo Shu-sodium chloride acid stain levelling agent, it is characterised in that: described
Total number of bacterial colonies≤1000cfu/g in chitin, E. CoIi content≤30cfu/g.
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