EP0941156A1 - Method of recycling package-cushioning material, and pellets and injection-molded articles made therefrom - Google Patents
Method of recycling package-cushioning material, and pellets and injection-molded articles made therefromInfo
- Publication number
- EP0941156A1 EP0941156A1 EP19980941886 EP98941886A EP0941156A1 EP 0941156 A1 EP0941156 A1 EP 0941156A1 EP 19980941886 EP19980941886 EP 19980941886 EP 98941886 A EP98941886 A EP 98941886A EP 0941156 A1 EP0941156 A1 EP 0941156A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pellets
- recycled
- foam
- mixed
- waste
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/04—Disintegrating plastics, e.g. by milling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/0026—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
- B29K2025/04—Polymers of styrene
- B29K2025/06—PS, i.e. polystyrene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- 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
- the present invention relates to the cycling of package-cushioning materials, such as materials formed of PS (polystyrene) foam, or a copolymerized material formed of PE (polyethylene) plus PS.
- PS polystyrene
- PE polyethylene
- the copolymerized PE + PS foam product and PE foam product have more difficulty in the recycling process because use of the PE + PS foam or PE foam is less popular, and the melting temperature of PE is higher than that of the PS. Therefore, the copolymerized PE + PS and PE foam waste are not usually collected to be recycled. However, in consideration of hazardous environment problems caused by the plastic wastes that are burnt as a way of disposal, it is necessary to do much research on developing recycling methods for those plastic wastes.
- PE + PS package-cushioning material consistently gains in popularity because of higher reliability and effectiveness in distribution, which are attributed to better physical properties of the copolymerized PE + PS in impact absorption, resiliency, durability against repeated use and to an advantage of occupying smaller volume, when packages are accumulated, resulting in reduction in distribution costs. Therefore, it is necessary to develop a new recycling method of the copolymerized PE + PS, since as the use of the PE + PS, as a package-cushioning material is on the increase.
- the present invention is disclosed to solve the aforementioned problems and it is an object of the present invention to provide a method of recycling package-cushioning materials. It is another object of the present invention to provide a method of recycling package-cushioning material including copolymerized foam of polyethylene (PE) and polystyrene (PS). It is still another object of the present invention to provide pellets formed by method of a recycling package-cushioning material including the copolymerized foam of PE and PS, and also to provide articles injection molded therefrom.
- PE polyethylene
- PS polystyrene
- a method of recycling package-cushioning material comprising the steps of: recycling wasted PS foam into recycled PS pellets; recycling wasted copolymerized PE + PS foam into recycled PE + PS pellets; mixing the recycled PS and PE + PS pellets along with new PS pellets; extruding the mixed pellets into recycled mixed pellets; and cutting the mixed recycled pellets extruded at the extruding process predetermined.
- Fig. 1 is a recycling flowchart of package-cushioning material in accordance with the present invention.
- the recycling method of the present invention is described in detail with reference to Fig. 1.
- synthetic package-cushioning materials are used to protect items from being damaged or destroyed in transportation.
- the used package-cushioning materials are usually separated and disposed of after delivery of the items.
- waste plastic package- cushioning materials collects those waste plastic package- cushioning materials and classifies them into types of waste, such as paper, vinyl, PS (polystyrene) foam and the copolymerized PE (polyethylene) + PS foam.
- the waste PS foam and the PE + PS foam go through a series of sequential processes or steps 20, namely pulverizing 30 ⁇ fusing (i.e., liquefying 40) ⁇ ingoting 50 ⁇ extruding 60 (following another fusing step) ⁇ pellet cutting 70, 80, to respectively make recycled PS pellets 70 and recycled PE + PS pellets 80.
- the recycled PS pellets 70 and the PE + PS pellets 80 and new high quality PS pellets 90 are mixed at a predetermined ratio of: 10- 40% recycled PS, 30-40% recycled PE + PS, and 40-50% new PS.
- the most preferred ratio is 30%: 30%: 40%, as shown in Table 1.
- the mixed pellets 100 are subsequently fused and extruded at 1 10 to make regenerated mixed pellets 120, which proceed to the injection molding process 130 to make a final regenerated mixed product 140 to be used as a raw material.
- the waste synthetic package-cushioning materials are dried by a drying process 150 prior to the recycling process 20.
- the recycled PS pellets 70, the recycled PE + PS pellets 80 and the new HIPS pellets 90 are of respectively similar sizes and are well mixed in order to ensure homogenous properties of a final regenerated mixed product.
- pigments titanium, carbon or their mixture
- recycled PS pellets 70, recycled PE + PS pellets 80 and new HIPS pellets 90 are mixed in the mixing process 100.
- the recycled mixed pellets 120 should be injected at a temperature of 160 - 200 degrees celcius to prevent combustion thereof to maintain a predetermined color.
- the recycling method of the present invention is found to be effective in producing a regenerated functional material 140 by mixing: (i) recycled PS (ii) PS+PE, and (iii) new PS at optimum ratios.
- Table 1 shows improved physical properties of the regenerated mixed materials at different mixing ratios, better than those of the conventional ABS resin or new HIPS resin.
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Buffer Packaging (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR19970042250 | 1997-08-28 | ||
KR4225097 | 1997-08-28 | ||
KR2393798 | 1998-06-24 | ||
KR1019980023937A KR100266290B1 (en) | 1997-08-28 | 1998-06-24 | Recyling method of package cushiaring materal, and mixed recycled pellets and extrusions including thereof |
PCT/KR1998/000260 WO1999011445A1 (en) | 1997-08-28 | 1998-08-27 | Method of recycling package-cushioning material, and pellets and injection-molded articles made therefrom |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0941156A1 true EP0941156A1 (en) | 1999-09-15 |
Family
ID=26633035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19980941886 Withdrawn EP0941156A1 (en) | 1997-08-28 | 1998-08-27 | Method of recycling package-cushioning material, and pellets and injection-molded articles made therefrom |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0941156A1 (en) |
JP (1) | JP2000505753A (en) |
KR (1) | KR100266290B1 (en) |
CN (1) | CN1237126A (en) |
AU (1) | AU9004898A (en) |
WO (1) | WO1999011445A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006047696A2 (en) | 2004-10-25 | 2006-05-04 | Ranpak Corp. | Motor-free dunnage converting system and method |
JP2008274133A (en) * | 2007-04-27 | 2008-11-13 | Sekisui Plastics Co Ltd | Expandable resin particles and method for producing the same |
KR101497017B1 (en) * | 2012-09-11 | 2015-03-02 | 이정화 | Recycling apparatus and recycling manufacturing method for expandable polystyrene ingot pellet and structure of expandable polystyrene ingot pellet |
KR101560800B1 (en) | 2015-01-16 | 2015-10-15 | 김성배 | Method for Fabrication of Homogeneous Recycled Plastic Pellet |
CN104868188B (en) * | 2015-04-05 | 2017-08-25 | 铜仁学院 | A kind of useless film process reuse technology on lithium battery diaphragm production line |
CN113896935A (en) * | 2021-11-25 | 2022-01-07 | 苏州德丽雅塑胶科技有限公司 | Micropore foaming recycling process for waste injection molding products |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3501139A1 (en) * | 1985-01-15 | 1986-07-17 | Horst 2053 Grabau Schröder | Moulding from plastics wastes and process for the production thereof |
AT394051B (en) * | 1988-12-06 | 1992-01-27 | Greiner Schaumstoffwerk | MOLDED PART FROM INJECTED OR EXTRUDED PLASTIC SHEETS AND METHOD FOR THE PRODUCTION THEREOF |
JPH04108835A (en) * | 1990-08-29 | 1992-04-09 | Hitachi Chem Co Ltd | Method for preparing reclaimed foamed thermoplastic resin molded product |
-
1998
- 1998-06-24 KR KR1019980023937A patent/KR100266290B1/en not_active IP Right Cessation
- 1998-08-27 JP JP51662599A patent/JP2000505753A/en active Pending
- 1998-08-27 AU AU90048/98A patent/AU9004898A/en not_active Abandoned
- 1998-08-27 WO PCT/KR1998/000260 patent/WO1999011445A1/en not_active Application Discontinuation
- 1998-08-27 EP EP19980941886 patent/EP0941156A1/en not_active Withdrawn
- 1998-08-27 CN CN98801209A patent/CN1237126A/en active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO9911445A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR19990023168A (en) | 1999-03-25 |
CN1237126A (en) | 1999-12-01 |
AU9004898A (en) | 1999-03-22 |
JP2000505753A (en) | 2000-05-16 |
KR100266290B1 (en) | 2000-09-15 |
WO1999011445A1 (en) | 1999-03-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19990414 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES |
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GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: KIM, JUNG, HO, 104-206, HANKUK 1CHA APT |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: SAMSUNG ELECTRONICS CO., LTD. |
|
17Q | First examination report despatched |
Effective date: 20011217 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20020301 |