CN103923357A - Method for improving exterior color of rubber crepe and keeping each technical index to reach SCR WF requirements - Google Patents
Method for improving exterior color of rubber crepe and keeping each technical index to reach SCR WF requirements Download PDFInfo
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 22
- 229920000126 latex Polymers 0.000 claims abstract description 79
- 239000004816 latex Substances 0.000 claims abstract description 79
- 238000012545 processing Methods 0.000 claims abstract description 40
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims abstract description 34
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims abstract description 27
- 235000010262 sodium metabisulphite Nutrition 0.000 claims abstract description 27
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 37
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000008367 deionised water Substances 0.000 claims description 21
- 229910021641 deionized water Inorganic materials 0.000 claims description 21
- 239000003292 glue Substances 0.000 claims description 18
- 235000013336 milk Nutrition 0.000 claims description 17
- 239000008267 milk Substances 0.000 claims description 17
- 210000004080 milk Anatomy 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 16
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 15
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 11
- 235000019253 formic acid Nutrition 0.000 claims description 11
- 238000005469 granulation Methods 0.000 claims description 11
- 230000003179 granulation Effects 0.000 claims description 11
- 239000000693 micelle Substances 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 3
- 239000002253 acid Substances 0.000 abstract description 7
- RPAJSBKBKSSMLJ-DFWYDOINSA-N (2s)-2-aminopentanedioic acid;hydrochloride Chemical class Cl.OC(=O)[C@@H](N)CCC(O)=O RPAJSBKBKSSMLJ-DFWYDOINSA-N 0.000 abstract 1
- 230000003712 anti-aging effect Effects 0.000 abstract 1
- 230000003064 anti-oxidating effect Effects 0.000 abstract 1
- 239000003795 chemical substances by application Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 16
- 229960000583 acetic acid Drugs 0.000 description 12
- 230000015271 coagulation Effects 0.000 description 10
- 238000005345 coagulation Methods 0.000 description 10
- 244000043261 Hevea brasiliensis Species 0.000 description 8
- 229910021529 ammonia Inorganic materials 0.000 description 8
- 229920003052 natural elastomer Polymers 0.000 description 7
- 229920001194 natural rubber Polymers 0.000 description 7
- 229920001368 Crepe rubber Polymers 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 102000030523 Catechol oxidase Human genes 0.000 description 5
- 108010031396 Catechol oxidase Proteins 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 235000021466 carotenoid Nutrition 0.000 description 4
- 150000001747 carotenoids Chemical class 0.000 description 4
- 230000003078 antioxidant effect Effects 0.000 description 3
- 229910017053 inorganic salt Inorganic materials 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 229920006173 natural rubber latex Polymers 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000012362 glacial acetic acid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 235000004252 protein component Nutrition 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000005862 Whey Substances 0.000 description 1
- 102000007544 Whey Proteins Human genes 0.000 description 1
- 108010046377 Whey Proteins Proteins 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 238000001246 colloidal dispersion Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 239000008291 lyophilic colloid Substances 0.000 description 1
- 239000008292 lyophobic colloid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000008288 physiological mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000010057 rubber processing Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 229940001584 sodium metabisulfite Drugs 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000011240 wet gel Substances 0.000 description 1
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- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention discloses a method for improving exterior color of rubber crepe and keeping each technical index to reach SCR WF requirements, comprising the following steps: firstly processing latex with an anti-aging agent 264, standing, adding sodium pyrosulfite for antioxidation, solidifying by adding acid and hydrogen peroxide, carrying out surface bubble-pressing, sprinkling sodium pyrosulfite, curing, tabletting, immersing, granulating and drying to obtain rubber with each technical index reaching SCR WF requirements. By the method, dark color and poor consistency of raw rubber produced from rubber crepe are obviously improved, and value of rubber crepe is effectively raised. The method has advantages of simple operation and low cost, and completely has an industrial popularization and application prospect.
Description
[invention field]
Invention relates to natural rubber preliminary working technical field, and particularly a kind of appearance color and maintenance all technical that improves rubber crepe reaches the method that full milk glue requires.
[background technology]
As a kind of natural synthetic material, the fresh latex (also claiming field latex) flowing out from Brazilian para ruber, be subject to the impact of kind, soil, weather, season and other factors (as planting density, fertilising, rubber tapping mode, chemical stimulation etc.), cause its composition, structure, even outward appearance etc. can show huge difference.The latex directly flowing out from rubber tree is generally white in color, but also have, is ash, purple, yellow, red, is even black, and as minority can be yellow containing the more latex of carotenoid, containing oxydase, the many or larger latex of activity degree can be grey black.
Natural rubber latex is to form complicated rubber-aq. type dispersion system, is a kind of special oil-in-water-type colloidal dispersion forming after lyophobic colloid absorption lyophilic colloid.Disperse phase comprises rubber particles, nonrubber particle; The whey that dispersion medium (external phase) forms for the water-soluble protein of energy, lipid acid, inorganic salt, carbohydrate etc.In nonrubber particle, contain corpora flava and FW particle, corpora flava contains polyphenoloxidase, and latex coagulum is exposed in air or oxygen, and the obfuscation that darkens, just because of existing due to polyphenoloxidase; FW particle contains carotenoid, and carotenoid is subject to the effect of polyphenoloxidase and is oxidized, and the material of overstrike, grey or black, so in caouttchouc preliminary working, take adequate measures to prevent grumeleuse variable color.
In production, standard natural rubber is all to adopt to concentrate the form of processing to solidify fresh latex.Because of the easy loses stability of fresh latex, for remote latex, all adopt and first increase ammonia and preserve, then be transported to factory and solidify.The solidifying process of latex is mainly divided into natural coagulation, and acid (acid or glacial acetic acid) is solidified, and inorganic salt solidify, biological coagulation.Natural coagulation technique is because setting time needs within tens hours, to make its application be restricted; Inorganic salt solidifying process is seldom used due to the performance of natural rubber is produced to a lot of detrimentally affects; Use at present most often acid (acid or glacial acetic acid) solidifying process, character due to acid-base neutralisation, it is many that consumption acid is solidified in existence, while reacting with the high ammonia fresh latex of long-time preservation, the phenomenon that occurs local solidification is more serious, grumeleuse occurs solidifying inhomogeneous, to natural rubber dry, performance impact is larger; The drawbacks such as the glue-preparing exhausted water of discharge is more containing latex particle, contaminate environment is serious; Chan Jiao district has a lot of glue agricultures and some old production plants that natural rubber latex is processed into rubber crepe, deliver to again integrated mill and carry out granulation oven dry, due to this time of three to four days of process need, rubber crepe causes colour-darkening because of oxidation, consistence is poor, the color requirement of the full milk glue in GB/T8081-2008/ISO2000:2003 < < caouttchouc technically classified rubber (TSR) specification that cannot be up to state standards guide rule > >, causes grade to decline.
In view of the present situation of rubber crepe, the rarer research for improving natural rubber crepe color and indices and performance.Analogy Shi Ju etc. (Agriculture of Anhui science 2008,36 (17): 7299-7300,7487), by the protein component in latex, carry out the research of rubber physiological Mechanism; And the variation of Rubber processing process protein component is not studied, so the appearance color of natural rubber crepe does not improve.
Therefore, be necessary to provide a kind of performance that both can effectively improve rubber crepe, make the be up to state standards requirement of the full milk glue in GB/T8081-2008/ISO2000:2003 < < caouttchouc technically classified rubber (TSR) specification guide rule > > of its appearance color and all technical simultaneously, method easy and simple to handle again, with low cost.
[summary of the invention]
The object of the present invention is to provide a kind of appearance color and maintenance all technical that improves rubber crepe to reach the method that full milk glue requires (SCR WF).
Specifically, the present invention uses antioxidant 264 to improve the ageing resistance of natural rubber, makes the latex of processing; In the latex of processing, add Sodium Pyrosulfite to improve its oxidation-resistance, make the latex of again processing; Then the formic acid of latex use 3% or 5% acetic acid solution and oxidants hydrogen peroxide are solidified, 3% sodium metabisulfite solution is shone in surface spray, obtains the wet grumeleuse of rubber; Compressing tablet after slaking, obtain rubber crepe and be immersed in granulation after three to four days in pond, finally dry, obtain the caouttchouc that SCR WF that all technical is up to state standards in GB/T8081-2008/ISO2000:2003 < < caouttchouc technically classified rubber (TSR) specification guide rule > > requires.
Specific embodiments of the present invention are as follows:
(1), ground antioxidant 264 is dissolved in to deionized water, then joins in latex and stir, standing half an hour, make the latex of processing;
(2), Sodium Pyrosulfite is dissolved in to deionized water, join in the latex that (1) prepare, make the latex of again processing;
(3), the mixing solutions of the formic acid that is 3% by concentration or 5% acetic acid solution and hydrogen peroxide joins in the latex that (2) prepare, and obtains the wet grumeleuse of rubber;
(4), Sodium Pyrosulfite is dissolved in to deionized water, use high-pressure spray gun to be sprayed onto the surface of the wet grumeleuse of rubber that (3) prepare, make the wet grumeleuse of the rubber of again processing;
(5), the wet grumeleuse slaking of rubber that (4) are obtained is after 16 hours, compressing tablet obtains rubber crepe, is placed in pond and soaks three to four days;
(6) the rubber crepe granulation, (5) being obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain all technical caouttchouc that full milk glue SCR WF in GB/T8081-2008/ISO2000:2003 < < caouttchouc technically classified rubber (TSR) specification guide rule > > requires that is up to state standards.
Of the present inventionly a kind ofly improve rubber crepe appearance color and keep all technical to reach the method that full milk glue (SCR WF) requires, described rubber crepe is that to adopt be fresh natural rubber latex latex processing preparation.
Of the present inventionly a kind ofly improve rubber crepe appearance color and keep all technical to reach the method that full milk glue (SCR WF) requires, described antioxidant 264 is technical grade, strength of solution is 40%, its consumption is to add 1.2g-3.5g in per kilogram latex, and to be made into concentration be 5% solution.
Of the present inventionly a kind ofly improve rubber crepe appearance color and keep all technical to reach the method that full milk glue (SCR WF) requires, the consumption of described Sodium Pyrosulfite is to add 0.2g-1.5g in per kilogram latex, and to be made into concentration be 0.5% solution.
Of the present inventionly a kind ofly improve rubber crepe appearance color and keep all technical to reach the method that full milk glue (SCR WF) requires, described hydrogen peroxide is technical grade, strength of solution is 40%, and its consumption is to add 2.3g-6.9g in per kilogram latex.
Of the present inventionly a kind ofly improve rubber crepe appearance color and keep all technical to reach the method that full milk glue (SCR WF) requires, described wet gel bake out temperature is 110-115 ℃.
Therefore, of the present inventionly a kind ofly improve rubber crepe appearance color and keep all technical to reach the method that full milk glue (SCR WF) requires, preferably adopt following embodiment:
(1), by 1.2g-3.Sg strength of solution, being 40%, technical grade antioxidant 264 is dissolved in deionized water, is made into concentration and is 5% solution, then joins in 1000g latex and stirs, and standing half an hour, makes the latex of processing;
(2), 0.2g-1.5g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, join in the latex that (1) make, stir, make the latex of again processing;
(3) latex coagulation that the mixing solutions of the technical grade hydrogen peroxide that the formic acid solution, with 3% or 5% acetic acid and 2.3g-6.9g strength of solution are 40% makes (2), obtains the wet grumeleuse of rubber;
(4), 0.2g-1.5g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, be sprayed onto (3) and make the wet grumeleuse of the rubber of again processing, slaking, compressing tablet, make rubber crepe;
(5), rubber crepe that (4) are obtained, be immersed in pond three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain the caouttchouc that all technical reaches the requirement of full milk glue.
[key point of the present invention]
Key problem in technology point of the present invention is:
1. the selection of antioxidant 264: it is that heat, oxygen aging are had to certain protective effect on the one hand that the present invention selects antioxidant 264, also can suppress on the other hand copper evil.
2. the selection of antioxidant: the present invention selects Sodium Pyrosulfite as antioxidant, object is to improve antioxidant property and the appearance color of rubber crepe.
3. the selection of peptizer: the formic acid solution of choice for use 3% of the present invention or 5% acetic acid solution solidify, and object is to reduce the local solidification of latex.
4. the selection of oxidants hydrogen peroxide: the present invention selects hydrogen peroxide to be mainly because hydrogen peroxide has the effect of sterilization, can suppress polyphenoloxidase, prevent carotenoid to be subject to the effect of polyphenoloxidase and be oxidized the material of overstrike, grey or black.
[effect of the present invention]
The present invention, by antioxidant 264 and Sodium Pyrosulfite and hydrogen peroxide treatment latex gained rubber crepe, makes the caouttchouc that indices and performance meet full milk glue SCR WF.According to the testing method test of defined in standard GB/T/T8081-2008/ISO2000:2003 < < caouttchouc technically classified rubber (TSR) specification guide rule > >, find that the tensile strength of rubber crepe obviously improves after treatment, of light color and consistent, widened rubber crepe range of application.
The present invention has improved the value of rubber crepe effectively, easy and simple to handle, and favorable reproducibility is with low cost, possesses the prospect of industrial application completely.
[subordinate list explanation]
Table 1 be full milk glue (SCR WF) in rubber crepe, standard GB/T/T8081-2008/ISO2000:2003 < < caouttchouc technically classified rubber (TSR) specification guide rule > > and process after the contrast of indices of technical requirements of rubber crepe.
The all technical of the rubber crepe after table 1.SCR WF, rubber crepe, processing
[embodiment]
Embodiment mono-:
(1), the technical grade antioxidant 264 that is 40% by the 1.2g concentration of ball mill milled, be made into concentration and be 5% solution, join in 1000g latex and stir, standing half an hour, make the latex of processing;
(2), 1.5g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, then join in 1000g high ammonia latex and stir, make the latex of processing;
(3) latex coagulation that the mixing solutions of the technical grade hydrogen peroxide that the formic acid solution, with 3% or 5% acetic acid and 2.3g strength of solution are 40% makes (2), obtains rubber lump;
(4), 1.5g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, be sprayed onto (3) and make latex coagulum, slaking, the compressing tablet of again processing, make rubber crepe;
(5) the rubber crepe, (4) being obtained soaks three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain rubber crepe rubber 286g.Rubber crepe after processing, after tested, indices is as follows respectively:
Embodiment bis-:
(1), the technical grade antioxidant 264 that is 40% by the 1.5g concentration of ball mill milled, be made into concentration and be 5% solution, join in 1000g latex and stir, standing half an hour, make the latex of processing;
(2), 1.0g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, then join in 1000g high ammonia latex and stir, make the latex of processing;
(3) latex coagulation that the mixing solutions of the technical grade hydrogen peroxide that the formic acid solution, with 3% or 5% acetic acid and 3.0g strength of solution are 40% makes (2), obtains rubber lump;
(4), 1.0g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, be sprayed onto (3) and make latex coagulum, slaking, the compressing tablet of again processing, make rubber crepe;
(5) the rubber crepe, (4) being obtained soaks three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain rubber crepe rubber 278g.Rubber crepe sample after processing, after tested, indices is as follows respectively:
Embodiment tri-:
(1), the technical grade antioxidant 264 that is 40% by the 2.0g concentration of ball mill milled, be made into concentration and be 5% solution, join in 1000g latex and stir, standing half an hour, make the latex of processing;
(2), 0.7g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, then join in 1000g high ammonia latex and stir, make the latex of processing;
(3) latex coagulation that the mixing solutions of the technical grade hydrogen peroxide that the formic acid solution, with 3% or 5% acetic acid and 4.0g strength of solution are 40% makes (2), obtains rubber lump;
(4), 0.7g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, be sprayed onto (3) and make latex coagulum, slaking, the compressing tablet of again processing, make rubber crepe;
(5) the rubber crepe, (4) being obtained soaks three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain rubber crepe rubber 284g.Rubber crepe sample after processing, after tested, indices is as follows respectively:
Embodiment tetra-:
(1), the technical grade antioxidant 264 that is 40% by the 2.5g concentration of ball mill milled, be made into concentration and be 5% solution, join in 1000g latex and stir, standing half an hour, make the latex of processing;
(2), 0.5g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, then join in 1000g high ammonia latex and stir, make the latex of processing;
(3) latex coagulation that the mixing solutions of the technical grade hydrogen peroxide that the formic acid solution, with 3% or 5% acetic acid and 5.0g strength of solution are 40% makes (2), obtains rubber lump;
(4), 0.5g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, be sprayed onto (3) and make latex coagulum, slaking, the compressing tablet of again processing, make rubber crepe;
(5) the rubber crepe, (4) being obtained soaks three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain rubber crepe rubber 280g.Rubber crepe sample after processing, after tested, indices is as follows respectively:
Embodiment five:
(1), the technical grade antioxidant 264 that is 40% by the 3.0g concentration of ball mill milled, be made into concentration and be 5% solution, join in 1000g latex and stir, standing half an hour, make the latex of processing;
(2), 0.3g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, then join in 1000g high ammonia latex and stir, make the latex of processing;
(3) latex coagulation that the mixing solutions of the technical grade hydrogen peroxide that the formic acid solution, with 3% or 5% acetic acid and 5.5g strength of solution are 40% makes (2), obtains rubber lump;
(4), 0.3g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, be sprayed onto (3) and make latex coagulum, slaking, the compressing tablet of again processing, make rubber crepe;
(5) the rubber crepe, (4) being obtained soaks three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain rubber crepe rubber 275g.Rubber crepe sample after processing, after tested, indices is as follows respectively:
Embodiment six:
(1), the technical grade antioxidant 264 that is 40% by the 3.5g concentration of ball mill milled, be made into concentration and be 5% solution, join in 1000g latex and stir, standing half an hour, make the latex of processing;
(2), 0.2g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, then join in 1000g high ammonia latex and stir, make the latex of processing;
(3) latex coagulation that the mixing solutions of the technical grade hydrogen peroxide that the formic acid solution, with 3% or 5% acetic acid and 6.9g strength of solution are 40% makes (2), obtains rubber lump;
(4), 0.2g Sodium Pyrosulfite is dissolved in to deionized water, be made into concentration and be 0.5% solution, be sprayed onto (3) and make latex coagulum, slaking, the compressing tablet of again processing, make rubber crepe;
(5) the rubber crepe, (4) being obtained soaks three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain rubber crepe rubber 283g.Rubber crepe sample after processing, after tested, indices is as follows respectively:
Claims (1)
1. improve the appearance color of rubber crepe and keep all technical to reach the method that full milk glue requires, it is characterized in that containing following steps:
(1), the antioxidant 264 of ball mill milled is dissolved in to deionized water, then join in latex, stir; Standing half an hour, make the latex of processing; Described antioxidant 264 is technical grade, and strength of solution is 40%, and its consumption is to add 1.2g-3.5g in per kilogram latex, and to be made into concentration be 5% solution;
(2), Sodium Pyrosulfite is dissolved in to deionized water, join in the latex that (1) prepare, make the latex of again processing; The consumption of described Sodium Pyrosulfite is to add 0.2g-1.5g in per kilogram latex, and to be made into concentration be 0.5% solution;
(3), the mixing solutions of the formic acid that is 3% by concentration or 5% acetic acid solution and hydrogen peroxide joins in the latex that (2) prepare, and obtains the wet grumeleuse of rubber; Described hydrogen peroxide is technical grade, and strength of solution is 40%, and its consumption is to add 2.3g-6.9g in per kilogram latex;
(4), Sodium Pyrosulfite is dissolved in to deionized water, use high-pressure spray gun to be sprayed onto the surface of the wet grumeleuse of rubber that (3) prepare, make the wet grumeleuse of the rubber of again processing; The consumption of described Sodium Pyrosulfite is to add 0.2g-1.5g in per kilogram latex, and to be made into concentration be 0.5% solution;
(5), the wet grumeleuse slaking of rubber that (4) are obtained is after 16 hours, compressing tablet obtains rubber crepe, is placed in pond and soaks three to four days;
(6), rubber crepe granulation that (5) are obtained, adopt the temperature of 110-115 ℃ that micelle is dried, obtain the rubber raw rubber that all technical reaches the requirement of full milk glue.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107446194A (en) * | 2017-09-11 | 2017-12-08 | 青岛双星轮胎工业有限公司 | The passenger car spare tyre of low odor dispersion |
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| CN107602955A (en) * | 2017-09-11 | 2018-01-19 | 青岛双星轮胎工业有限公司 | The passenger car spare tyre of low odor dispersion |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107446194A (en) * | 2017-09-11 | 2017-12-08 | 青岛双星轮胎工业有限公司 | The passenger car spare tyre of low odor dispersion |
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| CN107513190A (en) * | 2017-09-11 | 2017-12-26 | 青岛双星轮胎工业有限公司 | The passenger car spare tyre of low odor dispersion |
| CN107602955A (en) * | 2017-09-11 | 2018-01-19 | 青岛双星轮胎工业有限公司 | The passenger car spare tyre of low odor dispersion |
| CN108794658A (en) * | 2018-06-15 | 2018-11-13 | 海南省先进天然橡胶复合材料工程研究中心有限公司 | A method of preparing high performance heat resistant oxygen aging natural rubber |
| CN113773415A (en) * | 2021-09-16 | 2021-12-10 | 中国热带农业科学院橡胶研究所 | Method for improving quality consistency of whole latex |
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