WO1996011973A1 - Waste plastic conversion - Google Patents
Waste plastic conversion Download PDFInfo
- Publication number
- WO1996011973A1 WO1996011973A1 PCT/AU1995/000676 AU9500676W WO9611973A1 WO 1996011973 A1 WO1996011973 A1 WO 1996011973A1 AU 9500676 W AU9500676 W AU 9500676W WO 9611973 A1 WO9611973 A1 WO 9611973A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plastics
- plastic
- waste
- pipe
- blend
- Prior art date
Links
- 239000004033 plastic Substances 0.000 title claims abstract description 91
- 229920003023 plastic Polymers 0.000 title claims abstract description 88
- 239000002699 waste material Substances 0.000 title claims abstract description 48
- 238000006243 chemical reaction Methods 0.000 title description 2
- 238000000034 method Methods 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 2
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 claims 1
- 238000002156 mixing Methods 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 7
- 229920005989 resin Polymers 0.000 abstract description 7
- 239000010881 fly ash Substances 0.000 abstract description 5
- 239000011521 glass Substances 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 4
- 238000001914 filtration Methods 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 12
- 238000004064 recycling Methods 0.000 description 8
- 239000002904 solvent Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 239000000123 paper Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- FLKPEMZONWLCSK-UHFFFAOYSA-N diethyl phthalate Chemical compound CCOC(=O)C1=CC=CC=C1C(=O)OCC FLKPEMZONWLCSK-UHFFFAOYSA-N 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000013502 plastic waste Substances 0.000 description 2
- 229920000915 polyvinyl chloride Polymers 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- QMMJWQMCMRUYTG-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-(trifluoromethyl)benzene Chemical compound FC(F)(F)C1=C(Cl)C(Cl)=CC(Cl)=C1Cl QMMJWQMCMRUYTG-UHFFFAOYSA-N 0.000 description 1
- -1 A3S Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 101100536354 Drosophila melanogaster tant gene Proteins 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 1
- 241000412626 Penetes Species 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- XDXHAEQXIBQUEZ-UHFFFAOYSA-N Ropinirole hydrochloride Chemical compound Cl.CCCN(CCC)CCC1=CC=CC2=C1CC(=O)N2 XDXHAEQXIBQUEZ-UHFFFAOYSA-N 0.000 description 1
- 241001417495 Serranidae Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 229960002380 dibutyl phthalate Drugs 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009408 flooring Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 210000000006 pectoral fin Anatomy 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000012763 reinforcing filler Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- STCOOQWBFONSKY-UHFFFAOYSA-N tributyl phosphate Chemical compound CCCCOP(=O)(OCCCC)OCCCC STCOOQWBFONSKY-UHFFFAOYSA-N 0.000 description 1
- 229920011532 unplasticized polyvinyl chloride Polymers 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
- C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without reinforcement
-
- 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
Definitions
- THIS INVENTION is a method to recycle indiscriminate waste plastics without the need of separation and a process of pre ⁇ paration of such wastes. Combining with other wastes that adds strength to the mixture of plastic ⁇ and a system to per ⁇ form such process and an apparatus named INJECTRUSION to hand ' le this indiscriminate plastic mixture and manufacture value added products.
- Plastics are reclaimed within the plastic industry they add regrounds to virgin plastics at a rate of 5 percentage. Companies developed sandwich techniques where up to 25% of the same plastic reclaim is utilized in production of bottles. Some ⁇ ther methods use solvents to dissolve plastic waste and ex ⁇ truding it into pellets. The major impediments are the nu - merous plastic types that do not intermix like a jigsaw. The incompatibility of plastics means that the wastes have to be separated or at least selected for each blend. This adds to the cost of recycling and reusing. To deal with this problem intelligent identification systems have been developed.
- plastics More common plastics are: acetal, ABS, Acrylic, CP, HDPE LDPE, EPS, PA, PA6, PAG, PC, P ⁇ , Pi, PS, PUR, PVC, UC, UPVC, SAN, etc
- Products made from plastics that generate the wastes axe furniture, flooring, containers, toiletries, shavers, television sets, phones, radios, cas ⁇ ttes, computers, hairdryers, cables, pipes power points, tools, vacuum cleaners, torches, food dishes, trays, glasses, shoes, goggles, clothes, swim flippers, packaging container scrapp cars,boats, toys, aviation parts, machine parts, space junk.
- waste plastics can be prepa ⁇ red for recycling and even blending with each other together with other wastes can be used in the manufacturing of value added products.
- Aboundant waste thinners from paint companies, spray painters and chemically active plastics together with inert plastics can be blended and heated to form a new bond.
- the heating process partially de-polymerizes the plastics assisting new bond forming to take place under pressure.
- the invention comprises a method to use suitable thinners to be mixed with chemically active plas ⁇ tics like polystyrene, A3S, PVC.
- suitable thinners or solvents can be acetone, toluene, xylene, diethyl phthalate, dibutyl phtha- late, tributyl Phosphate, butyl stearate and others.
- the active plastics can form thick resins with the thinners that is a concrete like medium.
- Inert plastics are granulated in the usual fashion and they are further micronized to fine particles. Mieroniza- tion is an important advantage. A better intermixing can be achieved and melting temperature is spread quicker through the medium.
- the blend is loaded to its utmost potential.
- the plastic powders are thoroughly mixed into the resin.
- other wastes can be incorporated in the mix. They can only be fillers but can act as reinforcing agents ad - ding strenght to the final product.
- Such fillers/reinforcers can be fine - fibre paper, shredded natural fibres, flyash, carbon black (from tyres)glass.
- melt temperature is selected at the highest melting point of a given plastic, partial depolimerisation takes place and thus the monomers of the various plastics interpolymerize and form a new bond.
- the lower melt tempe ⁇ rature plastics act like a cement glue that reinforce the molecules. During the heating the reinforcing fillers are coated with the plastics and assist in the interbonding.
- virgin solvents and or other hydrocarbons can be used.
- a typical blend can incorporate the following: waste thinners(including pigment contaminant)polystyrene waste, polypropelene, polyvinylcloride,flyash,fine-fibre paper.
- Another mix is made up of : waste thinners, polystyrene, ASS,HDPE, PP, glass reinforced ABS, carbon black and fine-fibre paper.
- Yet another preparation will contain: waste or virgin thin.- ners/solvents, ABS,PET, nitrile,flyash, copper dust, The combinations of the mixes could be varied according to the requirement of the product design.
- the most important aspect of this recycling is that the plastics can be mixed in any quantity.
- This type of recycling system can be fully automated to handle all waste plastics, combine them with other fibrous waste and produce value added products.
- the invention includes in a further form an appara ⁇ tus for using the prepared plastic blend to manufacture plastic pipes of various thicknesses.
- the apparatus is a combination of injection and ex- trusion machine. As the number of plastics have a variable heat softening point they also have a variable cooling/harde ⁇ ning time scale.
- the pressurized melt-chamber will soften the plastic compound injecting it into a pipe cavity. As the cavity fills the inner support pipe is pulled within an outher support pipe. At this section the plastic pipe is being cooled. The walls of the newly made plastic pipe is sup ⁇ ported until the product is totally cooled off.
- This apparatus is utilizing two combined methods of plastic production and it is named INJECTRUSION.
- FIGURE 1 is the FLOW CHART of the preferred pre- paration system of the waste thinners and plastics
- FIGURE 2 shows the grinding and blending of plas ⁇ tics with conventional methods. The micronization is not illustrated on figure 2. ⁇
- FIGURE 3 is a- schematic diagram of a new method of INJECTRUSION according to the embodiment of the invention.
- FIGURE 4 is a temperature/time correlation of a trial run of the injectrusion.
- FIGURE 5 are magnified photo images of the injec- truded plastic pipe.
- FIG 1 there is disclosed various components used in a preferred method to prepare the plas- tics and thinners.
- FIG. 1 discloses a chemical storage area(thinners) A . Above this area there is a fume extractor marked G attached to a condenser F which condenses and channels the liquid to liquid tanks D. The thinners are pumped through a filter. Pump being B and filter is marked C. The filtration does not remove fine particles of pigments only lumpy, foreign materials and soli ⁇ dified paint.
- Plastic "0" stockpile marked H is a stockpile of chemically active plastics , that is that these plastics dissolve in thinners. The compactor I transfers the plastics from stockpile H into liquid tanks D concentrating them . Pump B2 transfers the resin to a storage E Lister, Inc.
- the plastic "1 - infinite stockpile J contains all plastics available in the waste stream regardless of type, size, colour.
- This plastic pile is granulated by granulator K and then washed of liquid and other impurities by a mobile wash conveyor L»
- the granulated waste plastics are drained and dryed at system M.
- the water is filtered for reuse and solids co ⁇ llected at station S.
- the plastics now advance to a pulverizer 0 where they are ground to fine powder which are stored in holding tank P, From this stock a mobile vacuum loader Q picks up the powder plastic and a weigh/mix station R will blendsftix the compound once more.
- the next stage of the process is a blending tank S where the ground plastics (and other fil- lers X ) are mixed blended with resin from storage E to its optimum loading potential.
- the blend is introduced to the compression chamber T where together with the heater unit U the plastic blend is compressed and heated to the designed melting point of 180 - 240 ⁇ 3.
- the heat can be sup- plied by oil - electrical element - infra red - microwave heat- source.
- the rotational moulder V is a fully automated in- jectrusion, injection or extrusion system.
- the innovative pro ⁇ perties of the injectrusion version will be explained in mo ⁇ re details on figure 3.
- the products pipes and/or any plastic articles are stockpiled at storage station W.
- Figure 2 is a diagram of indiscriminate plastic waste.
- a conveyor/feed hopper feeds this product to grinder and a secondary blender. After washing this grind the plas- tics are micronized/pulverized to fine powder of 20-45 micron size. This is a very important advantage for preparing a thouroughly mixed compound and assist in heating to penet ⁇ rate at a faster and even way.
- Figure 3 shows the injectrusion method developed for indiscriminate waste plastic recycling and in this diagram deals in particular with the manufacturing of pipes.
- the lenght of the machine is equal to the outer support pipe t within this support sleeved support pipe 2.
- the outher support pipe 1 is stationary the inner pipe which covered with a sleeve in order to assist in demoul- ding is the sleeved support pipe 2 is attached to a ret ⁇ ractable wall 5 which is mobilized with the retractor screw 10 marked 6.
- the fixed wall 14 the retractable wall 5 the outer support pipe 1 and the sleeved support pipe 2 form the pipe cavity into where the molten plastic 13 is extruded under pressure by the pressurized melt chamber 4. This is fed with 15 the plastic blend 12 by a vacuum evacuator 18 from the pro— duct container 11.
- the pressurized melt chamber has an outlet 16 where excess solvent is bled off. In the event that the thin ⁇ ners are dried prior pressure melting the outlet is closed. 20. The drawn off thinners are colected as solvent at 17,
- the cooling system ⁇ is situated in the support bench 00 under the outer support pipe 1. which is en ⁇ cased in a cooling jacket 7. Water is supplied by water pi ⁇ pes 19. The water is cooled and circulated in cooling tower TO The diameter of the outer support pipe 1 and the in ⁇ ner sleeved support pipe 2 can be varied accordind to the requi ⁇ rement of the plastic pipe to be produced. Alternately seve ⁇ ral fixed sized machines could opperate side by side, Figure 4 deals with the injectrusion of a plastic pipe. This was a trial where the actual intention was to accu ⁇ rately log the temperatures and the power.
- Figure 5 shows the partial depolymerization and the subsequent interpolymerization of the monomers together with the glue like reinforcement of the fibres. On these pictures some cavities are visible they have developed due absence of bleeding outlets.
- a method of recovering indiscriminate waste plas- tics comprising the following steps preparation of medium from waste thinners and che ⁇ mically active waste plastics blending the inert plastic powders into this medium blending other fibrous wastes into medium blending aboundant powder waste of flyash into mix using reclaimed carbons and glass as reinforcement in the blend of medium and powdered plastics T Formula
- the method as claimed in claim 2 that all sol ⁇ vents are suitable for the production of the medium 4.
- the method as claimed that the inert plastic wastes are prepared as a fine powder that is another central point of interblending capability heating capability
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU36450/95A AU3645095A (en) | 1994-10-12 | 1995-10-12 | Waste plastic conversion |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPM8710 | 1994-10-12 | ||
AUPM8710A AUPM871094A0 (en) | 1994-10-12 | 1994-10-12 | Waste plastics conversion |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996011973A1 true WO1996011973A1 (en) | 1996-04-25 |
Family
ID=3783229
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU1995/000676 WO1996011973A1 (en) | 1994-10-12 | 1995-10-12 | Waste plastic conversion |
Country Status (2)
Country | Link |
---|---|
AU (1) | AUPM871094A0 (en) |
WO (1) | WO1996011973A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1673204A1 (en) * | 2003-10-13 | 2006-06-28 | Cycloplas Holdings Pty Ltd. | Process for recycling waste plastics |
CN101839374A (en) * | 2010-04-29 | 2010-09-22 | 盐城广源管业有限公司 | Process for producing polyethylene (PE) pipeline by using waste plastics |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2039201A1 (en) * | 1991-03-27 | 1992-09-28 | Margaret G. Rodman | Filler for molded articles |
JPH06136178A (en) * | 1992-06-15 | 1994-05-17 | Yoshiaki Nagaura | Method for reclaiming foamed polystyrene or the like |
DE4323320A1 (en) * | 1993-07-06 | 1995-01-12 | Hendrickx Heinz Dr | Process for the separation, cleaning, sorting and recycling of mixtures and/or composites of plastics with one another and/or with other materials using solvent processes |
DE4333994A1 (en) * | 1993-09-16 | 1995-04-20 | Juergen Zoeller | Process for recycling plastic waste |
-
1994
- 1994-10-12 AU AUPM8710A patent/AUPM871094A0/en not_active Abandoned
-
1995
- 1995-10-12 WO PCT/AU1995/000676 patent/WO1996011973A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2039201A1 (en) * | 1991-03-27 | 1992-09-28 | Margaret G. Rodman | Filler for molded articles |
JPH06136178A (en) * | 1992-06-15 | 1994-05-17 | Yoshiaki Nagaura | Method for reclaiming foamed polystyrene or the like |
DE4323320A1 (en) * | 1993-07-06 | 1995-01-12 | Hendrickx Heinz Dr | Process for the separation, cleaning, sorting and recycling of mixtures and/or composites of plastics with one another and/or with other materials using solvent processes |
DE4333994A1 (en) * | 1993-09-16 | 1995-04-20 | Juergen Zoeller | Process for recycling plastic waste |
Non-Patent Citations (2)
Title |
---|
DERWENT ABSTRACT, Accession No. 94-197242/24, Class A13; & JP,A,06 136 178, (NAGAURA Y), 17 May 1994. * |
DERWENT WPAT ONLINE ABSTRACT, Accession No. 92-416249; & CA,A,2 039 201, (ROOMAN M G), 28 September 1992. * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1673204A1 (en) * | 2003-10-13 | 2006-06-28 | Cycloplas Holdings Pty Ltd. | Process for recycling waste plastics |
EP1673204A4 (en) * | 2003-10-13 | 2007-10-03 | Cycloplas Holdings Pty Ltd | Process for recycling waste plastics |
CN101839374A (en) * | 2010-04-29 | 2010-09-22 | 盐城广源管业有限公司 | Process for producing polyethylene (PE) pipeline by using waste plastics |
Also Published As
Publication number | Publication date |
---|---|
AUPM871094A0 (en) | 1994-11-03 |
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