CN1050371C - Process for regenerating used rubber - Google Patents
Process for regenerating used rubber Download PDFInfo
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- CN1050371C CN1050371C CN95110415A CN95110415A CN1050371C CN 1050371 C CN1050371 C CN 1050371C CN 95110415 A CN95110415 A CN 95110415A CN 95110415 A CN95110415 A CN 95110415A CN 1050371 C CN1050371 C CN 1050371C
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- rubber
- mixing
- mixing machine
- rubber powder
- benzaldehyde
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Abstract
The present invention discloses a regenerating method for waste and old rubber, which can markedly improve the physical and mechanical properties of regenerated rubber materials without environmental pollution. The method mainly comprises three steps of the preparation of waste and old rubber powder, the mixing of waste and old rubber powder, and finished product tabletting treatment. The regenerating method is characterized in that 100 parts of waste and old rubber powder and 3 to 20 parts of benzaldehyde mater are put in a rubber mixing machine to carry out the refining milling of the rubber powder to uniformly mix the rubber powder and the benzaldehyde at normal temperature in mixing step; then, benzaldehyde matter among rubber molecules of the rubber powder from the rubber mixing machine is removed.
Description
The present invention relates to a kind of method of waste old being made material through processing with rubber and green compound performance.This regenerated rubber is widely used in doughnut, cycle tyre, and cart tire, water-proof material is in the rubber items such as travelling belt.
At present, water/oil method is the method for common regenerating waste or used rubber, belongs to the category of thermal oxidation method.This method comprises desulfurized step under the participation of oxygen in the air and the high temperature action.The problem and shortage part that it exists is: 1, because high temperature desulfurizing (temperature is at 180-200 ℃) inevitably can make the rubber linear structure produce cracking, integral network structure is destroyed, thereby the physical and mechanical properties of regeneration sizing material is significantly reduced; 2, because high temperature oxidation generates toxic and harmfuls such as SO2, cause environmental pollution.
The object of the present invention is to provide a kind of process for regenerating used rubber.It can improve the physical and mechanical properties of regeneration sizing material significantly, can not produce environmental pollution again.
In order to achieve the above object, the solution of the present invention is: it mainly comprises the producing of waste rubber powder, mixing and three steps of compressing tablet finished product, its improvements are, mixing is to carry out at normal temperatures, in rubber mixing machine, 100 parts of waste rubber powders and 3-20 part benzaldehyde material are dropped in the rubber mixing machine, the rubber mixing machine thin-pass mixes them, and the rubber powder that will come out from rubber mixing machine is sloughed the benzaldehyde material between xanthan molecule then.Waste old described here comprises waste or used vulcanized rubber, aged natural rubber, aged synthetic rubber.According to F=2KTb
2R, the tension force on the F-molecular chain, molecular chain two ends of b-orientation distance length, the T-temperature, K-Bo Ciman constant, r-parameter, so the tension force F on the rubber molecular chain is directly proportional with the length b of its molecular chain, just the length of molecular chain is big more, and the tension force that is born on its molecular chain is also big more.The benzaldehyde material can go between the molecule of cross-linked rubber at normal temperatures thoroughly, make its expansion and follow the string, become and have plastic regeneration sizing material, this variation belongs to physical change, the rubber molecule linear chain does not have oxidized destruction, and preserve key and maximum length on its basic molecular chain as far as possible, therefore, the present invention can significantly improve the physical and mechanical properties of regeneration sizing material.In addition since mixing be to carry out at normal temperatures, the benzaldehyde material belongs to nontoxic material, so can not produce environmental pollution.The benzaldehyde material must be removed after making waste rubber powder expansion plasticizing again, otherwise, in next step compressing tablet finished product operation, play destruction through mixing waste rubber powder.The benzaldehyde material of sloughing in the rubber powder of mixing back can be by volatilizing naturally, because benzaldehyde physical property instability is met air and is oxidized to the benzoic acid material gradually, the benzoic acid material is inoperative to rubber powder.The benzaldehyde material of sloughing in the rubber powder of mixing back also can feed water vapor, because the benzaldehyde material can together volatilize with steam, and volatilizees soon and thoroughly.Add the benzaldehyde amount of substance and be directly proportional, also be directly proportional with the waste rubber powder granular size with the amount of contained rubber in the waste rubber powder.The present invention includes three main programs: the producing of waste rubber powder, mixing and compressing tablet finished product.Producing of waste rubber powder comprises: the classification of selecting materials, and cutting, washing, coarse crushing, in small, broken bits, fiber treatment, screening.Mixing comprising: mixing plasticizing, slough the benzaldehyde material.The compressing tablet finished product comprises: kneading, to filter, and refining is pressed into product.Because the benzaldehyde material is volatile,,, goes the benzaldehyde material so that fully being penetrated between xanthan molecule so when mixing, preferably adopt Banbury mixer.Directly enter mixing operation after can washing for waste and old latex product.
Benzaldehyde material of the present invention mainly is phenyl aldehyde, phenylacetic aldehyde, phenylpropyl aldehyde.The best results that obtains with phenyl aldehyde wherein.
A kind of embodiment preferably of the present invention is: the benzaldehyde material of sloughing between xanthan molecule is to feed water vapor in the pressurized vessel that fills mixing back rubber powder, benzaldehyde material and water vapor between xanthan molecule are together volatilized, like this, both improve the quality of reclaimed rubber, improved production efficiency again.
Another kind of the present invention embodiment preferably is: through the mixing rubber powder of rubber mixing machine, sloughing between xanthan molecule before the benzaldehyde material, put into sealed vessel earlier and deposit 10-30 hour, go, bring into play expansion, the plastification of its maximum so that the benzaldehyde material fully is penetrated between xanthan molecule.
The present invention another preferably embodiment be: the rubber powder that comes out from rubber mixing machine is put into before sealed vessel seals up for safekeeping, adds 2.5-7.5 part Stockholm tar and 2.5-7.5 part coal tar again.
The present invention another preferably embodiment be: the rubber powder that comes out from rubber mixing machine is put into before sealed vessel seals up for safekeeping, adds 5-15 part perfume oil or third fractional oil or four line oil again.They also can join simultaneously with described Stockholm tar, coal tar and form another kind embodiment preferably in the sealed vessel.
Because the present invention has taked technique scheme, so compared with prior art have following advantage and actual effect:
1, goes between the cross-linked rubber molecule with regard to porous at normal temperatures owing to the benzaldehyde material, make its expansion and follow the string, physical change has taken place, become and have plastic regeneration sizing material, save the high temperature desulfurizing operation, do not had oxidized destruction on the rubber molecule linear chain of cross-linked rubber, and preserved the key and the maximum length of its basic molecular chain as far as possible, so the present invention has improved the physical and mechanical properties of regeneration sizing material greatly, even the physical and mechanical properties of approaching former sizing material.For details see attached table one and subordinate list two.
The main physical properties test chart of subordinate list one one-level junked tire reclaimed rubber
The main physical properties test chart of subordinate list two waste and old lactic acid reclaimed rubbers
2, since mixing be to carry out at normal temperatures, physical change only takes place, chemical transformation does not take place, in addition, the benzaldehyde material belongs to non-toxic substance, so whole technological process non-environmental-pollution has solved regenerating waste or used rubber big problem of solution not since the industry midium or long term.
3, because the reclaimed rubber physical and mechanical properties that the present invention produces significantly improves, thereby the ratio of mixing the regeneration sizing material in making rubber item improves greatly.As: make rubber tyre, the regeneration sizing material incorporation that water/oil method is produced and the ratio of natural gum (rubber) incorporation are 15: 100, and the regeneration sizing material incorporation that the present invention produces and the ratio of natural gum (rubber) incorporation can reach 120: 100.In addition, the regeneration sizing material that can all make with the present invention general rubber item (as sebific duct, adhesive tape, sole etc.) is made.Therefore, the present invention can reduce the cost of making rubber item greatly, will produce huge economic and social benefit.
Provide embodiments of the invention below in conjunction with accompanying drawing, be used for further specifying the present invention.
Fig. 1-process flow sheet of the present invention;
The process flow sheet of Fig. 2-one embodiment of the invention.
Wherein: the producing of 1-waste rubber powder, 2-is mixing, the classification of selecting materials of 3-compressing tablet finished product, 4-, 5-cutting, 6-washing, the 7-coarse crushing, 8-is in small, broken bits, the 9-fiber treatment, the 10-screening, the mixing plasticizing of 11-, 12-takes off benzaldehyde, the 13-kneading, 14-filters, the 15-refining, 16-is pressed into product, and 17-permeates plasticizing.
Embodiment 1, with reference to figure 1.Choose waste and used rubber tyre, after rubber powder is produced operation 1, make 〉=20 purpose rubber powder 100kg, these rubber powders and 20kg phenyl aldehyde (content is more than 98%) liquid, pack in the Banbury mixer, enter mixing operation 2, at normal temperatures, mixing 10-15 minute, rubber powder after mixing is taken out from rubber mixing machine, reinstall in the pressurized vessel that is provided with import and export, water vapor feeds from ingress, flows out from the exit, 3-5 hour feeding time, thoroughly slough phenyl aldehyde, afterwards, through kneading 13, filter 14, refining 15 is pressed into product 16 all operations, and it is processed as block elements.After testing, pull apart brute force: 15.3MPa, tensile yield: 461%, plasticity number (Wei Shi): 0.47, outward appearance: black, exquisiteness, glossy, be the neat bulk of rule.
Embodiment 2, with reference to figure 2.Choose waste and used rubber tyre, after rubber powder is produced operation 1, make 〉=24 purpose rubber powder 100kg, with these rubber powders and 10kg phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde (content is more than 98%) liquid, pack in the Banbury mixer, enter mixing operation 2, at normal temperatures, mixing 5-10 minute, material after mixing is taken out in the encloses container of packing into from rubber mixing machine, and add Stockholm tar, each 2.5kg of coal tar seals and permeated plasticizing in 16 hours, reinstall in the pressurized vessel that is provided with import and export, water vapor feeds from ingress, flows out from the exit, feeds time 3-5 hour, thoroughly slough phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde, afterwards, through kneading 13, filter 14, refining 15 is pressed into product 16 all operations and is processed into block elements.After testing, pull apart brute force: 17.3MPa, tensile yield: 470%, plasticity number (Wei Shi): 0.55, outward appearance: black, exquisiteness, glossy, be the neat bulk of rule.
Embodiment 3, with reference to figure 2.Choose waste and used rubber tyre, after rubber powder is produced operation 1, make 〉=40 purpose rubber powder 100kg, behind these rubber powders adding Banbury mixeies, add 3kg phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde (content is more than 98%) liquid again, enter mixing operation 2, at normal temperatures, mixing 5-10 minute, the material after mixing is taken out from rubber mixing machine in the encloses container of packing into, add Stockholm tar simultaneously, each 7.5kg of coal tar, perfume oil (or third fractional oil or four line oil) 15kg, pack in the encloses container, seal and permeated plasticizing in 20 hours, reinstall in the pressurized vessel that is provided with import and export, water vapor feeds from ingress, flow out from the exit, fed time 3-5 hour, thoroughly slough phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde.Afterwards, through kneading 13, filter 14, refining 15 is pressed into product 16 all operations and is processed into block elements.After testing, pull apart brute force: 16.5MPa, tensile yield: 490%, plasticity number (Wei Shi): 0.60, outward appearance: black, exquisiteness, glossy, be the neat bulk of rule.
Embodiment 4, with reference to figure 2.Choose waste and used rubber tyre, after rubber powder is produced operation 1, make 〉=15 purpose rubber powder 100kg, behind these rubber powders adding Banbury mixeies, add 20kg phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde (content is more than 98%) liquid again, enter mixing operation 2, at normal temperatures, mixing 10-20 minute, from rubber mixing machine, take out the material after mixing in the encloses container of packing into, add Stockholm tar, each 4kg of coal tar simultaneously, perfume oil (or third fractional oil or four line oil) 8kg seals and permeated plasticizing in 24 hours.Take out, volatilization is 72 hours naturally, so that thoroughly slough phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde, then, through kneading 13, filters 14, and refining 15 is pressed into product 16 all operations and is processed into block elements.After testing, pull apart brute force: 18.0MPa, tensile yield: 500%, plasticity number (Wei Shi): 0.56.
Embodiment 5, with reference to figure 2.Choose waste and old latex product, put into Banbury mixer after the washing, add 15kg phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde (content is more than 98%) liquid, enter mixing operation 2, at normal temperatures, mixing 10-15 minute, material after mixing is reinstalled in the encloses container, and adding Stockholm tar, each 3kg of coal tar, perfume oil (or third fractional oil or four line oil) 5kg seals infiltration plasticizing in 20 hours, take out, reinstall in the pressurized vessel that is provided with import and export, fed water vapor 3-5 hour, thoroughly slough phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde.Afterwards, through kneading 13, filter 14, refining 15 is pressed into product 16 all operations and is processed into block elements.After testing, pull apart brute force: the 16.0MPa. tensile yield: 670%, plasticity number (Wei Shi): 0.65, outward appearance is identical with rubber.
Claims (7)
1, a kind of process for regenerating used rubber, it mainly comprises the producing of waste rubber powder, mixing and three steps of compressing tablet finished product, it is characterized in that: mixing is to carry out at normal temperatures, in rubber mixing machine, 100 parts of waste rubber powders and 3-20 part benzaldehyde material are dropped into rubber mixing machine, the rubber mixing machine thin-pass, they are mixed, and the rubber powder that will come out from rubber mixing machine is sloughed the benzaldehyde material between xanthan molecule then.
2, process for regenerating used rubber according to claim 1 is characterized in that, said benzaldehyde material is phenyl aldehyde or phenylacetic aldehyde or phenylpropyl aldehyde.
3, process for regenerating used rubber according to claim 2 is characterized in that, the benzaldehyde material of sloughing between xanthan molecule is to feed water vapor in the pressurized vessel that fills mixing back rubber powder, and benzaldehyde material and water vapor between xanthan molecule are together volatilized.
4, according to claim 1 or 3 described process for regenerating used rubber, it is characterized in that,,, put into sealed vessel earlier and deposit 10-30 hour, so that the benzaldehyde material osmosis is gone between xanthan molecule sloughing between xanthan molecule before the benzaldehyde material through the mixing rubber powder of rubber mixing machine.
5, process for regenerating used rubber according to claim 4 is characterized in that, the rubber powder that comes out from rubber mixing machine is put into before sealed vessel seals up for safekeeping, adds 2.5-7.5 part Stockholm tar and 2.5-7.5 part coal tar again.
6, process for regenerating used rubber according to claim 4 is characterized in that, the rubber powder that comes out from rubber mixing machine is put into before sealed vessel seals up for safekeeping, adds 5-15 part perfume oil or third fractional oil or four line oil again.
7, process for regenerating used rubber according to claim 5 is characterized in that, the rubber powder that comes out from rubber mixing machine is put into before sealed vessel seals up for safekeeping, adds 5-15 part perfume oil or third fractional oil or four line oil again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110415A CN1050371C (en) | 1995-04-15 | 1995-04-15 | Process for regenerating used rubber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95110415A CN1050371C (en) | 1995-04-15 | 1995-04-15 | Process for regenerating used rubber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1133773A CN1133773A (en) | 1996-10-23 |
| CN1050371C true CN1050371C (en) | 2000-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN95110415A Expired - Fee Related CN1050371C (en) | 1995-04-15 | 1995-04-15 | Process for regenerating used rubber |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102501335B (en) * | 2011-10-26 | 2015-07-22 | 河北瑞威科技有限公司 | Novel process for reducing and regenerating waster rubber continuously |
| CN107174965A (en) * | 2017-06-06 | 2017-09-19 | 安徽圣源橡塑科技有限公司 | A kind of bionical carbon PVC blend films of use in waste water treatment and preparation method thereof |
| CN107245172A (en) * | 2017-06-06 | 2017-10-13 | 安徽圣源橡塑科技有限公司 | A kind of activating and regenerating rubber powder/PVC blending damping materials and preparation method thereof |
| CN107286404A (en) * | 2017-06-06 | 2017-10-24 | 安徽圣源橡塑科技有限公司 | A kind of membrane pump compound rubber and plastic barrier film and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072937A (en) * | 1991-12-05 | 1993-06-09 | 段定选 | Regeneration method of waste sulphurated rubber by chemical plasticizing machinery |
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1995
- 1995-04-15 CN CN95110415A patent/CN1050371C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1072937A (en) * | 1991-12-05 | 1993-06-09 | 段定选 | Regeneration method of waste sulphurated rubber by chemical plasticizing machinery |
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| CN1133773A (en) | 1996-10-23 |
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