CN115340699A - EPS (expandable polystyrene) recycling piece re-foaming system and method - Google Patents
EPS (expandable polystyrene) recycling piece re-foaming system and method Download PDFInfo
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- CN115340699A CN115340699A CN202211068694.3A CN202211068694A CN115340699A CN 115340699 A CN115340699 A CN 115340699A CN 202211068694 A CN202211068694 A CN 202211068694A CN 115340699 A CN115340699 A CN 115340699A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005187 foaming Methods 0.000 title claims abstract description 17
- 238000004064 recycling Methods 0.000 title claims abstract description 8
- 229920006248 expandable polystyrene Polymers 0.000 title abstract description 64
- 239000002245 particle Substances 0.000 claims abstract description 54
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 19
- 238000001125 extrusion Methods 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 18
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 14
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 238000005303 weighing Methods 0.000 claims abstract description 11
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000004033 plastic Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000003086 colorant Substances 0.000 claims abstract description 6
- 239000006260 foam Substances 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- 230000018044 dehydration Effects 0.000 claims abstract description 4
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 4
- 239000008187 granular material Substances 0.000 claims abstract description 4
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 239000003963 antioxidant agent Substances 0.000 claims description 3
- 230000003078 antioxidant effect Effects 0.000 claims description 3
- 239000011324 bead Substances 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 239000000454 talc Substances 0.000 claims description 3
- 229910052623 talc Inorganic materials 0.000 claims description 3
- 239000004793 Polystyrene Substances 0.000 abstract description 38
- 238000010558 suspension polymerization method Methods 0.000 abstract description 5
- 239000004088 foaming agent Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/16—Making expandable particles
-
- 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
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0066—Use of inorganic compounding ingredients
-
- 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
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/141—Hydrocarbons
-
- 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
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
-
- 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
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/06—Polystyrene
-
- 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
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
- C08J2425/06—Polystyrene
-
- 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 invention discloses a system and a method for re-foaming an EPS (expandable polystyrene) recovery part, which comprises the following steps: first, classification: classifying the EPS waste product materials according to colors; second, crushing and granulating: crushing the EPS waste products classified in the first step, and granulating by using an extrusion granulator after crushing to obtain a PS reclaimed material; thirdly, weighing and stirring: weighing, stirring and mixing the foam PS reclaimed material recovered in the second step, a brand new PS material and an auxiliary agent; fourthly, cutting into granules: heating the PS particles mixed with the auxiliary agent in the third step by a plastic extruder, mixing and plasticizing, injecting 6% pentane, extruding the mixture by a special die head in a semi-molten state, and cutting the mixture into EPS particles by an underwater granulator; fifthly, preparing finished EPS particles: and (4) carrying out centrifugal dehydration and drying on the EPS particles in the fifth step to obtain finished EPS particles. The invention adopts a continuous extrusion process, and solves the problems that the traditional suspension polymerization method for preparing EPS particles can not add recycled materials and the recycled materials can not be foamed because of the breakage of molecular chains in the recycling process.
Description
Technical Field
The invention relates to the technical field of recycling of EPS (expandable polystyrene) recycled parts, in particular to a system and a method for re-foaming EPS recycled parts.
Background
Expandable Polystyrene (EPS) has been widely used in the field of packaging because of its excellent and long-lasting heat-insulating properties, unique cushioning shock resistance, aging resistance and water resistance. The EPS packaging material is thrown away after being used up, so that serious environmental pollution is caused, the EPS material is difficult to degrade in natural environment, and the recycling of EPS waste products becomes a consensus and policy requirement in the industry;
waste products of EPS parts are made into PS particles through production procedures of crushing, melting, granulating and the like, molecular chains of PS materials are broken in a series of operations such as molding, crushing, melting and extruding, the toughness of the materials is greatly reduced, and the made PS particles are generally only used as injection molding or common filling materials and cannot be used for secondary foaming;
the existing EPS particle production process adopts a suspension polymerization method, which is a method that styrene monomer (liquid), water and various auxiliary agents of foaming agent are added into a reaction kettle together to produce polystyrene particles containing foaming agent through polymerization reaction, and the polystyrene particles are washed, dehydrated, dried and screened to obtain EPS beads.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide an EPS recovery piece re-foaming system and method so as to solve the problems that a recovery material cannot be added in the traditional suspension polymerization method for preparing EPS particles and the recovery material cannot be foamed due to the breakage of molecular chains in the recovery process.
The technical scheme for realizing the purpose is as follows: an EPS recovery piece re-foaming system comprises the following steps:
first, classification: classifying the EPS waste product materials according to colors;
second, crushing and granulating: crushing the EPS waste products classified in the first step, and granulating by using an extrusion granulator after crushing to obtain a PS reclaimed material;
thirdly, weighing and stirring: weighing, stirring and mixing the foam PS reclaimed material recovered in the second step, a brand new PS material and an auxiliary agent;
fourthly, cutting into granules: heating the PS particles mixed with the auxiliary agent in the third step by a plastic extruder, mixing and plasticizing, injecting 6% pentane, extruding the mixture by a special die head in a semi-molten state, and cutting the mixture into EPS particles by an underwater granulator;
fifthly, preparing finished EPS particles: and (4) carrying out centrifugal dehydration and drying on the EPS particles cut in the fifth step to obtain finished EPS particles.
As a preferred technical scheme of the invention: the proportion of the EPS reclaimed material is as follows: new PS particles: and (3) recovering PS particles: antioxidant: dispersing agent: and (3) wax preparation: talc =66:30:1:0.5:1.5:2.
as a preferred technical scheme of the invention: the extrusion granulation temperature of the granulator is controlled between 160 ℃ and 200 ℃.
As a preferred technical scheme of the invention: the foam PS reclaimed material, the brand new PS material and the auxiliary agent are 30 percent: 65%:5 percent.
As a preferred technical scheme of the invention: the extruder is heated to 170-180 ℃.
As a preferred technical scheme of the invention: the diameter of the EPS particles cut by the extruder is 0.8-1mm.
A method of an EPS recycling system, comprising the steps of:
and (3) mixing a PS reclaimed material, a brand new PS material and an auxiliary agent according to the proportion of 30%:65%: the method comprises the steps of proportioning 5%, mixing and plasticizing through a plastic extruder, injecting 6% pentane, extruding through a special die head in a semi-molten state, cutting into EPS particles through an underwater granulator, centrifugally dewatering and drying to obtain finished EPS particles, weighing and packaging the finished EPS particles, and is flexible in process by adopting a continuous extrusion method.
The invention has the beneficial effects that:
the invention relates to a system and a method for re-foaming an EPS (expandable polystyrene) recovery part, which adopt a continuous extrusion method to realize flexible process, improve the material performance by improving the proportion, add a recovery material by the continuous extrusion method, solve the problem that the recovery material cannot be added by the traditional suspension polymerization method for preparing EPS particles, and simultaneously solve the problem that the recovery material cannot be foamed due to the breakage of molecular chains in the recovery process.
Detailed Description
The present invention will be further described below.
Example 1:
an EPS recovery piece re-foaming system comprises the following steps:
first, classification: classifying the EPS waste product materials according to colors;
second, crushing and granulating: crushing the EPS waste products classified in the first step, and granulating by an extrusion granulator after crushing, wherein the extrusion granulation temperature of the granulator is controlled to be 160-200 ℃ to obtain PS reclaimed materials;
thirdly, weighing and stirring: weighing, stirring and mixing the foam PS reclaimed material, the brand new PS material and the auxiliary agent recovered in the second step, wherein the foam PS reclaimed material, the brand new PS material and the auxiliary agent are 30 percent: 65%:5 percent;
fourthly, cutting into granules: heating the PS particles mixed with the auxiliary agent in the third step to 170-180 ℃ by a plastic extruder, mixing and plasticizing, injecting 6% pentane, extruding by a special die head in a semi-molten state, and cutting into EPS particles with the diameter of 0.8-1mm by an underwater granulator;
fifthly, preparing finished EPS particles: and (4) carrying out centrifugal dehydration and drying on the EPS particles cut in the fifth step to obtain finished EPS particles.
The proportion of the EPS reclaimed material is as follows: new PS particles: and (3) recovering PS particles: antioxidant: dispersing agent: and (4) wax feeding: talc =66:30:1:0.5:1.5:2.
a method of an EPS recycling system, comprising the steps of:
classifying EPS waste products according to colors, crushing the classified EPS waste products, granulating by an extrusion granulator after crushing, controlling the extrusion granulation temperature at 160 ℃ to obtain PS reclaimed materials, and mixing the PS reclaimed materials, the brand-new PS materials and the auxiliary agent according to the proportion of 30%:65%:5 percent of the materials are proportioned, PS particles mixed with the auxiliary agent are heated to 170 ℃ by a plastic extruder, 6 percent of pentane is injected after mixing and plasticizing, the PS particles are extruded by a special die head in a semi-molten state, the PS particles are cut into EPS particles with the diameter of 0.8mm by an underwater granulator, finally, the EPS particles are centrifugally dehydrated and dried to obtain finished EPS particles, and the finished EPS particles are weighed and packaged.
Example 2
Classifying EPS waste products according to colors, crushing the classified EPS waste products, granulating by an extrusion granulator after crushing, controlling the extrusion granulation temperature at 200 ℃ to obtain PS reclaimed materials, and mixing the PS reclaimed materials, the brand-new PS materials and an auxiliary agent according to the proportion of 30%:65%: mixing materials according to a proportion of 5 percent, heating PS particles mixed with the auxiliary agent to 180 ℃ by a plastic extruder, mixing and plasticizing, injecting 6 percent pentane, extruding by a special die head in a semi-molten state, cutting into EPS particles with the diameter of 1mm by an underwater granulator, finally, centrifugally dehydrating and drying to obtain finished EPS particles, and weighing and packaging the finished EPS particles.
The EPS beads are prepared by heating, melting, mixing and plasticizing polystyrene particles and the auxiliary agent through an extruder, adding a foaming agent to form a uniform blend, extruding through a die head, underwater granulating, drying and dehydrating.
The continuous extrusion method is flexible in process, the material performance can be improved by improving the proportion, and meanwhile, the recycled materials can be added by the continuous extrusion method, so that the problem that the recycled materials cannot be added by the traditional suspension polymerization method for preparing EPS particles is solved, and the problem that the recycled materials cannot be foamed due to breakage of molecular chains in the recycling process is solved.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore all equivalent technical solutions should also fall into the scope of the present invention, and should be defined by the claims.
Claims (7)
1. An EPS recovery piece re-foaming system is characterized by comprising the following steps:
first, classification: classifying the EPS waste product materials according to colors;
second, crushing and granulating: crushing the EPS waste products classified in the first step, and granulating by using an extrusion granulator after crushing to obtain a PS reclaimed material;
thirdly, weighing and stirring: weighing, stirring and mixing the foam PS reclaimed material recovered in the second step, a brand-new PS material and an auxiliary agent;
fourthly, cutting into granules: heating the PS particles mixed with the auxiliary agent in the third step by a plastic extruder, mixing and plasticizing, injecting 6% pentane, extruding the mixture by a special die head in a semi-molten state, and cutting the mixture into EPS particles by an underwater granulator;
fifthly, preparing finished EPS particles: and (4) carrying out centrifugal dehydration and drying on the EPS particles cut in the fifth step to obtain finished EPS particles.
2. The EPS recovered piece re-foaming system of claim 1, wherein the proportion of the EPS recovered material is as follows: new PS particles: and (3) recovering the PS particles: antioxidant: dispersing agent: and (4) wax feeding: talc =66:30:1:0.5:1.5:2.
3. the EPS recycled piece re-foaming system of claim 1, wherein the extrusion granulation temperature of the granulator is controlled to be 160-200 ℃.
4. The EPS recycled member re-foaming system of claim 1, wherein the proportion of the foamed PS recycled material, the brand new PS material and the auxiliary agent is 30%:65%:5 percent.
5. An EPS reclaim re-foaming system of claim 1 wherein the extruder is heated to 170-180 ℃.
6. An EPS recycling piece re-foaming system according to claim 5, wherein the extruder cuts EPS beads having a diameter of 0.8-1mm.
7. A method of an EPS recyclate re-foaming system, an EPS recyclate re-foaming system according to any one of claims 1 to 6, comprising the steps of:
and (3) mixing a PS reclaimed material, a brand new PS material and an auxiliary agent according to the proportion of 30%:65%: the method comprises the steps of proportioning 5%, mixing and plasticizing through a plastic extruder, injecting 6% pentane, extruding through a special die head in a semi-molten state, cutting into EPS particles through an underwater granulator, centrifugally dewatering and drying to obtain finished EPS particles, weighing and packaging the finished EPS particles, and is flexible in process by adopting a continuous extrusion method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211068694.3A CN115340699A (en) | 2022-08-30 | 2022-08-30 | EPS (expandable polystyrene) recycling piece re-foaming system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211068694.3A CN115340699A (en) | 2022-08-30 | 2022-08-30 | EPS (expandable polystyrene) recycling piece re-foaming system and method |
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| CN202211068694.3A Pending CN115340699A (en) | 2022-08-30 | 2022-08-30 | EPS (expandable polystyrene) recycling piece re-foaming system and method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1286165C (en) * | 1986-06-12 | 1991-07-16 | The Dow Chemical Company | Expandable polyvinyl (idene) aromatic particles, process for preparing them and molded articles produced therefrom |
| CN1907684A (en) * | 2006-08-16 | 2007-02-07 | 南京法宁格挤塑保温隔热板有限公司 | Method of preparing polystyrene extrusion molding cystosepiment by polystyrene recovery material |
| CN109762200A (en) * | 2017-11-09 | 2019-05-17 | 四川大学 | Functionality can send out/send out polystyrene bead and preparation method thereof |
-
2022
- 2022-08-30 CN CN202211068694.3A patent/CN115340699A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1286165C (en) * | 1986-06-12 | 1991-07-16 | The Dow Chemical Company | Expandable polyvinyl (idene) aromatic particles, process for preparing them and molded articles produced therefrom |
| CN1907684A (en) * | 2006-08-16 | 2007-02-07 | 南京法宁格挤塑保温隔热板有限公司 | Method of preparing polystyrene extrusion molding cystosepiment by polystyrene recovery material |
| CN109762200A (en) * | 2017-11-09 | 2019-05-17 | 四川大学 | Functionality can send out/send out polystyrene bead and preparation method thereof |
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Application publication date: 20221115 |