CN104999593A - Waste polyethylene terephthalate recycling and reusing method - Google Patents
Waste polyethylene terephthalate recycling and reusing method Download PDFInfo
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- CN104999593A CN104999593A CN201510464420.XA CN201510464420A CN104999593A CN 104999593 A CN104999593 A CN 104999593A CN 201510464420 A CN201510464420 A CN 201510464420A CN 104999593 A CN104999593 A CN 104999593A
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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
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Abstract
The invention relates to a waste polyethylene terephthalate recycling and reusing method. The method comprises the steps that firstly, waste polyethylene terephthalate products are recycled and sorted, impurities in the waste polyethylene terephthalate products are removed, surface contaminants are cleaned up, the waste polyethylene terephthalate products are smashed and screened through a 80-mesh screen, and undersized materials are dried; secondly, the dried undersized materials are fed into a double-screw extruder, extruded and molten to obtain melt; thirdly, low polymers and bubbles in the melt are pumped out at negative pressure; and fourthly, the melt is filtered, the filtered melt is directly subjected to die drawing through a multi-layer composite die head to obtain PET thin film crude products, the PET thin films are fixed to a jig dyeing machine, dyed, dried for the first time, rinsed with water of 70-120 DEG C for 1-5 minutes and then dried for the second time to obtain finished PET thin film products. The method is simple, practical and fewer in operation step, and the raw material cost is low; the method for recycling and reusing the waste polyethylene terephthalate is environmentally friendly and beneficial to cyclic utilization of resources.
Description
Technical field
The present invention relates to a kind of recycling method of waste and old PETG, belong to chemical material field.
Background technology
Because PET film mostly is single use, along with abandoning in a large number after PET film use, the wasting of resources caused thus and white pollution problems are day by day serious.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of recycling method of waste and old PETG, the inventive method is simple and practical, operating procedure is few, cost of material is low, waste and old PETG recycling environmental protection, is conducive to recycling of resource.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of recycling method of waste and old PETG, comprising:
1) reclaim waste and old PETG goods, steps of sorting for removing impurities, cleaning removing surface contaminant, pulverized 80 mesh sieves, extracting screen underflow drying process;
2) dried screenings is sent into double screw extruder, after extruding melting, obtain melt;
3) by negative pressure by 2) oligomer in the melt that obtains and bubble extract out;
4) melt filtration, after filtering, melt is by the direct drawing-die of MULTILAYER COMPOSITE die head, obtains PET film crude product,
5) PET film be fixed on dye jigger and dye, first time dries, 70-120 DEG C of water rinse 1-5 minute, and second time is dried, and obtains PET film finished product.
On the basis of technique scheme, the present invention can also do following improvement.
Further, 1) in, described waste and old PETG goods take from the polyster fibre after the laminated film containing PET, waste and old tape, dyeing, the mixture of one or more in waste and old terylene clothing.
Further, 1) in, described drying is 60-70 DEG C, dry 10-40 minute.
Further, 2) in, the temperature of described double screw extruder is respectively: a district 180-230 DEG C, two district 180-230 DEG C, three district 250-270 DEG C, four district 250-270 DEG C, five district 200-280 DEG C, six district 200-280 DEG C, die head temperature is 240-300 DEG C, and double screw extruder linear speed is 20-100 rev/min.
Further, 3) in, described negative pressure is-10--60mbar, process 0.5-1h.
Further, 5) in, the temperature of described dyestuff is 70-120 DEG C, dyeing 1-8 minute.
Further, 5) in, described first time bake out temperature be 50-100 DEG C, dry 5-20 minute, described second time bake out temperature is 50-100 DEG C, dries 1-10 minute.
The invention has the beneficial effects as follows:
The inventive method is simple and practical, and operating procedure is few, and cost of material is low, and waste and old PETG recycling environmental protection, is conducive to recycling of resource.
Detailed description of the invention
Be described principle of the present invention and feature below, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment 1
A recycling method for waste and old PETG, comprising:
1) reclaim the laminated film goods of waste PET, steps of sorting for removing impurities, cleaning removing surface contaminant, pulverized 80 mesh sieves, extracting screen underflow 70 DEG C of dryings 40 minutes;
2) dried screenings is sent into double screw extruder, melt is obtained after extruding melting, the temperature of described double screw extruder is respectively: 230 DEG C, a district, two 230 DEG C, districts, three 270 DEG C, districts, four 270 DEG C, districts, five 280 DEG C, districts, six 280 DEG C, districts, die head temperature is 300 DEG C, and double screw extruder linear speed is 100 revs/min.
3) by negative pressure by 2) oligomer in the melt that obtains and bubble extract out, described negative pressure be-10mbar, processes 0.5h.
4) melt filtration, after filtering, melt is by the direct drawing-die of MULTILAYER COMPOSITE die head, obtains PET film crude product,
5) PET film be fixed on dye jigger and dye, the temperature of described dyestuff is 120 DEG C, dyes 8 minutes, dries 5 minutes for 100 DEG C, and 70 DEG C of water rinses 1 minute, dry 10 minutes, obtain PET film finished product for 100 DEG C.
Embodiment 2
A recycling method for waste and old PETG, comprising:
1) reclaim the laminated film goods of waste PET, steps of sorting for removing impurities, cleaning removing surface contaminant, pulverized 80 mesh sieves, extracting screen underflow 60 DEG C of dryings 10 minutes
2) dried screenings is sent into double screw extruder, melt is obtained after extruding melting, the temperature of described double screw extruder is respectively: 180 DEG C, a district, two 180 DEG C, districts, three 270 DEG C, districts, four 270 DEG C, districts, five 280 DEG C, districts, six 280 DEG C, districts, die head temperature is 300 DEG C, and double screw extruder linear speed is 90 revs/min.
3) by negative pressure by 2) oligomer in the melt that obtains and bubble extract out, described negative pressure be-10mbar, processes 0.5h.
4) melt filtration, after filtering, melt is by the direct drawing-die of MULTILAYER COMPOSITE die head, obtains PET film crude product,
5) PET film be fixed on dye jigger and dye, the temperature of described dyestuff is 120 DEG C, dyes 6 minutes, and 50 dry 5 minutes, and 120 DEG C of water rinses 1 minute, dry 10 minutes, obtain PET film finished product for 100 DEG C.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a recycling method for waste and old PETG, is characterized in that, comprising:
1) reclaim waste and old PETG goods, steps of sorting for removing impurities, cleaning removing surface contaminant, pulverized 80 mesh sieves, extracting screen underflow drying process;
2) dried screenings is sent into double screw extruder, after extruding melting, obtain melt;
3) by negative pressure by 2) oligomer in the melt that obtains and bubble extract out;
4) melt filtration, after filtering, melt is by the direct drawing-die of MULTILAYER COMPOSITE die head, obtains PET film crude product;
5) PET film be fixed on dye jigger and dye, first time dries, 70-120 DEG C of water rinse 1-5 minute, and second time is dried, and obtains PET film finished product.
2. method according to claim 1, it is characterized in that, 1) in, described waste and old PETG goods take from the polyster fibre after the laminated film containing PET, waste and old tape, dyeing, the mixture of one or more in waste and old terylene clothing.
3. method according to claim 1, is characterized in that, 1) in, described drying is 60-70 DEG C, dry 10-40 minute.
4. method according to claim 1, it is characterized in that, 2) in, the temperature of described double screw extruder is respectively: a district 180-230 DEG C, two district 180-230 DEG C, three district 250-270 DEG C, four district 250-270 DEG C, five district 200-280 DEG C, six district 200-280 DEG C, die head temperature is 240-300 DEG C, and double screw extruder linear speed is 20-100 rev/min.
5. method according to claim 1, is characterized in that, 3) in, described negative pressure is-10--60mbar, process 0.5-1h.
6. method according to claim 1, is characterized in that, 5) in, the temperature of described dyestuff is 70-120 DEG C, dyeing 1-8 minute.
7. method according to claim 1, is characterized in that, 5) in, described first time bake out temperature be 50-100 DEG C, dry 5-20 minute, described second time bake out temperature is 50-100 DEG C, dries 1-10 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510464420.XA CN104999593A (en) | 2015-07-31 | 2015-07-31 | Waste polyethylene terephthalate recycling and reusing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510464420.XA CN104999593A (en) | 2015-07-31 | 2015-07-31 | Waste polyethylene terephthalate recycling and reusing method |
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| CN104999593A true CN104999593A (en) | 2015-10-28 |
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| CN201510464420.XA Pending CN104999593A (en) | 2015-07-31 | 2015-07-31 | Waste polyethylene terephthalate recycling and reusing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106346634A (en) * | 2016-08-31 | 2017-01-25 | 浙江世博新材料股份有限公司 | Method for preparing regenerated plastic particles by using waste cloth and regenerated plastic particles |
| CN106432798A (en) * | 2016-08-11 | 2017-02-22 | 桂林市春晓环保科技有限公司 | Recovery process of waste cross-linked polyethylene terephthalate |
| CN106432789A (en) * | 2016-08-11 | 2017-02-22 | 桂林市春晓环保科技有限公司 | Recycling technology of waste crosslinked poly(diallyl terephthalate) |
Citations (4)
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| CN1250405A (en) * | 1997-03-20 | 2000-04-12 | 伊斯曼化学公司 | Process for continuously producing polyester articles with scrap recycle in a continuous melt-to-preform process |
| CN101035752A (en) * | 2004-08-25 | 2007-09-12 | 布拉斯科姆股份有限公司 | Process for chemical recycling of post consumption poly (ethylene terephthalate) and equipment for chemical recycling of post consumption poly(ethylene terephthalate) |
| CN102642312A (en) * | 2012-05-21 | 2012-08-22 | 福建百宏高新材料实业有限公司 | Processing method for recovering and processing PET (polyethylene glycol terephthalate) waste film in compounding way by using twin-screw extrusion melting |
| CN103114468A (en) * | 2013-01-13 | 2013-05-22 | 江西科为薄膜新型材料有限公司 | Method for manufacturing dyed PET (Polyethyleneglycol Terephthalate) film |
-
2015
- 2015-07-31 CN CN201510464420.XA patent/CN104999593A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1250405A (en) * | 1997-03-20 | 2000-04-12 | 伊斯曼化学公司 | Process for continuously producing polyester articles with scrap recycle in a continuous melt-to-preform process |
| CN101035752A (en) * | 2004-08-25 | 2007-09-12 | 布拉斯科姆股份有限公司 | Process for chemical recycling of post consumption poly (ethylene terephthalate) and equipment for chemical recycling of post consumption poly(ethylene terephthalate) |
| CN102642312A (en) * | 2012-05-21 | 2012-08-22 | 福建百宏高新材料实业有限公司 | Processing method for recovering and processing PET (polyethylene glycol terephthalate) waste film in compounding way by using twin-screw extrusion melting |
| CN103114468A (en) * | 2013-01-13 | 2013-05-22 | 江西科为薄膜新型材料有限公司 | Method for manufacturing dyed PET (Polyethyleneglycol Terephthalate) film |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106432798A (en) * | 2016-08-11 | 2017-02-22 | 桂林市春晓环保科技有限公司 | Recovery process of waste cross-linked polyethylene terephthalate |
| CN106432789A (en) * | 2016-08-11 | 2017-02-22 | 桂林市春晓环保科技有限公司 | Recycling technology of waste crosslinked poly(diallyl terephthalate) |
| CN106346634A (en) * | 2016-08-31 | 2017-01-25 | 浙江世博新材料股份有限公司 | Method for preparing regenerated plastic particles by using waste cloth and regenerated plastic particles |
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Application publication date: 20151028 |