CN103286883A - Recycling method of consumed and discarded films - Google Patents
Recycling method of consumed and discarded films Download PDFInfo
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- CN103286883A CN103286883A CN2012100521601A CN201210052160A CN103286883A CN 103286883 A CN103286883 A CN 103286883A CN 2012100521601 A CN2012100521601 A CN 2012100521601A CN 201210052160 A CN201210052160 A CN 201210052160A CN 103286883 A CN103286883 A CN 103286883A
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- plastic foil
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- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000004064 recycling Methods 0.000 title 1
- 238000004140 cleaning Methods 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 238000012545 processing Methods 0.000 claims abstract description 23
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 17
- 231100000719 pollutant Toxicity 0.000 claims abstract description 17
- 229920000092 linear low density polyethylene Polymers 0.000 claims abstract description 16
- 239000004707 linear low-density polyethylene Substances 0.000 claims abstract description 16
- 229920001684 low density polyethylene Polymers 0.000 claims abstract description 15
- 239000004702 low-density polyethylene Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 14
- 239000004094 surface-active agent Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 229920003023 plastic Polymers 0.000 claims description 77
- 239000004033 plastic Substances 0.000 claims description 77
- 239000011888 foil Substances 0.000 claims description 66
- 239000002184 metal Substances 0.000 claims description 21
- 229910052751 metal Inorganic materials 0.000 claims description 21
- 239000008187 granular material Substances 0.000 claims description 15
- 238000010298 pulverizing process Methods 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 7
- 238000009736 wetting Methods 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
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- 239000002994 raw material Substances 0.000 claims description 4
- 238000001238 wet grinding Methods 0.000 claims description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 3
- 239000007844 bleaching agent Substances 0.000 claims description 2
- 239000007800 oxidant agent Substances 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 2
- 238000000071 blow moulding Methods 0.000 abstract 2
- 239000010408 film Substances 0.000 description 125
- 239000000463 material Substances 0.000 description 23
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- 238000012423 maintenance Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
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- 230000000007 visual effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 230000002045 lasting effect Effects 0.000 description 2
- 239000013502 plastic waste Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
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- 239000004698 Polyethylene Substances 0.000 description 1
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- 239000003599 detergent Substances 0.000 description 1
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- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000976 ink Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 239000000758 substrate Substances 0.000 description 1
Images
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
- B29B17/02—Separating plastics from other materials
-
- 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
- B29B17/0036—Recovery of plastics or other constituents of waste material containing plastics by agglomeration or compacting of large particles, e.g. beads, granules, pellets, flakes, slices
-
- 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
- B29B17/02—Separating plastics from other materials
- B29B2017/0213—Specific separating techniques
- B29B2017/0286—Cleaning means used for separation
- B29B2017/0289—Washing the materials in liquids
-
- 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
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0625—LLDPE, i.e. linear low density 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
- B29K2023/0608—PE, i.e. polyethylene characterised by its density
- B29K2023/0633—LDPE, i.e. low density 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/065—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts containing impurities
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/008—Wide strips, e.g. films, webs
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a method for processing feeds of consumed and discarded linear low-density or low-density polyethylene films into a blow-molding film product with the quality of being same as that of an almost-new product. The method comprises the following steps of: tearing feeds of the films in a crushing machine, namely, exposing the surface areas of the films and enabling the films to be layered; cleaning the torn feeds of the films in a water bath containing a surface active agent; stirring the films in the water bath containing the surface active agent, wherein pollutants on the films are removed; crushing the cleaned films into smaller chips, additionally cleaning the crushed films in a rotary friction cleaning machine, additional pollutants are removed from the films; and then drying the crushed films and compacting the dried and crushed films into granulated matters of the blow-molding film product with the quality of being same as that of the almost-new product under the condition without adding water.
Description
Technical field
The present invention relates to for the method that reclaims waste material, more specifically, relate to for the method that reclaims the discarded LLDPE film in consumption back and the low density polyethylene films after the consumption.
Background technology
Reclaim consumption back plastic waste material and be subjected to a large amount of environmental protection and " green " publicity.Plastic waste material comprises PETG (PET) material (for example, being used for pop bottle) and undyed high density polyethylene (HDPE) (HDPE) material (for example, feeding bottle) after the consumption that known most municipal administration mixes.In typical removal process, from other waste products, isolate the container that is constituted by PET and HDPE, subsequently it is ground into less fragment, cleaning, heats and extrudes or granulation, to reuse as other products.
Waste material (PC) is polyethylene film after one type the consumption that is difficult to reclaim.In general, the PC membrane material is " stretch package " LLDPE (LLDPE).Because strength characteristics and the tensile properties of LLDPE, thereby such film packing material and the packaging material used as palletization loading or packing process.The PC film of another kind of type is as the low density polyethylene (LDPE) (LDPE) of packing and be used as bag.
The LLDPE film is used for packing and protection box, container or the similar articles of shipment on tray.When arriving the designated destination, from the material of palletization, remove such PC film and discarded.Such PC film has usually and is adhesive in the label on the described film outside and places multiple mark on the described film in shipment.The PC film generally holds the material several on the tray, and therefore described rete layer is folded mutually.
The PC film also is used for other waste materials of packing.When the PC film is removed from tray or other goods, because the pollution of high level (for example, dirt, oil, biomaterial, stratiform thing (layering), adhesive for labels etc.), PC film or quilt are abandoned at landfill yard or as the filler that is used for other plastic products and are processed.General the establishment as yet re-uses the PC film as feasible blown film product, to be used as industrial membrane or bag product.Usually, owing to there is the pollution of high level, the purposes of such film of using is limited, this so that it is to cause unhappy characteristic in serious handling problem and the finished product, for example smell, fade and the outward appearance of " pit is arranged ".
Utilize the equipment of present disclosure also must have durable and lasting structure, and in its whole service life-span, also should require the user that less maintenance is provided or maintenance is not provided.For the market attractiveness of the equipment that improves present disclosure, thereby also should to have cheap construction be its most extensive possible market of supply for it.At last, also a purpose is to realize all aforesaid advantage and purposes, and does not cause the relative shortcoming of any essence.
Summary of the invention
Present disclosure has overcome the shortcomings and limitations of background technology discussed above.
Provide a kind of and be processed into the method that is close to the blown film product of not using quality for the feed that will consume the discarded LLDPE film in back or low density polyethylene films.Described method comprises that the feed with described film tears in pulverizer, wherein the surf zone of exposed film comprises making described film layering.In the water-bath that contains washing agent, clean the feed of the film through tearing.In the bath that contains surfactant, stir described film, wherein from described film except the pollutant on the striping.Film through cleaning is milled to littler fragment, and in the spin friction cleaning machine, cleans the film through grinding in addition, wherein remove other pollutant from film.Subsequent drying described through grinding film and with its under the situation that does not add water compacting for being close to the granulate of the blown film product do not use quality.
The method of the feed of processing of films can comprise at least one at least 140 °F but be no more than cleaning process in the hot water of 190 temperature.During this process, in the feed of film, detect metal and before attrition process, it is removed from feed.
A kind of method that is close to the blown film product of not using quality that is processed into for the discarded film after will consuming also is provided.Described method one of comprises in the feed of feed that callable LLDPE plastic foil is provided and LDPE film, and remove metal from the feed of described plastic foil.Pulverize plastic foil after removing metal, wherein crushing process tears the also surf zone of exposed film with plastic foil.Plastic foil through pulverizing is discharged in the water-bath by screen, wherein stirs plastic foil through pulverizing with all surface of wetting described plastic foil through pulverizing.From water-bath, take out plastic foil subsequently and carry out the wet-milling of plastic foil.
In the spin friction cleaning machine, clean the plastic foil through grinding again, wherein from plastic foil, remove pollutant.In the hydraulic cyclone machine, separate at least two kinds of dissimilar plastic foils that grind through cleaning, lighter plastic foil is separated with heavier plastic foil.With the plastic foil that grinds dry and under the situation that does not add water compacting do not use the LLDPE plastics of quality and the granulate of LDPE for being close to.Subsequently, with the granulate storage or as the raw material in the blown film operation.
A kind of method that is close to the blown film product of not using quality that is processed into for the discarded film after will consuming also is provided.Described method one of comprises in the feed of feed that callable LLDPE plastic foil is provided and LDPE film, and remove metal from the feed of described plastic foil.After removing metal, pulverize plastic foil then, thereby wherein plastic foil is torn the surf zone of exposed film.Plastic foil through pulverizing is discharged in the water-bath by screen, at all surface of the described film of stirred in water bath with wetting plastic foil through pulverizing.Described water-bath comprises surfactant (for example, detergent additives) to help to remove pollutant.From water-bath, take out through the plastic foil of cleaning and with its wet-milling.Subsequently, in the spin friction cleaning machine, clean so plastic foil through grinding again, wherein remove other pollutant from plastic foil.
Make plastic foil experience hydraulic cyclone machine to separate at least two kinds of dissimilar plastic foils that grind through cleaning.In the hydraulic cyclone machine, lighter plastic foil is separated with heavier plastic foil.Dry plastic foil through grinding makes it contain the water content that is no more than 10 weight %.Under the situation that does not add water with drying grind the plastic foil compacting for being close to the granulate of the vinyon do not use quality, store described granulate or used as the raw material in the blown film operation.Plastic foil through granulation also can be configured as pill after compacting step.
Utilize the equipment of present disclosure to have not only durable but also lasting structure, and in its whole service life-span, will require the user that less maintenance is provided or maintenance is not provided.The equipment of present disclosure also has cheap construction to improve its market attractiveness and to be its most extensive possible market of supply thus.At last, all aforementioned advantages and purpose are achieved, and do not cause the relative shortcoming of any essence.
Description of drawings
Understand these and other advantages of the present invention better with reference to accompanying drawing, wherein:
Fig. 1 is the flow chart for an exemplary of the method that reclaims discarded (PC) film after consuming.
Fig. 2 is according to the schematic top view of flowchart configuration shown in Fig. 1 for the equipment of processing PC film.
The specific embodiment
Provide a kind of for the method and apparatus of recovery consumption back waste material (PC) as the PC film, described PC film is difficult to reclaim, and reason is to be adhesive in the label and the multiple mark and other pollutants that place on the described film on the described film outside in shipment.For the feasible blown film product that can be re-used is provided, must from the PC film, remove mark and the pollutant of label, adhesive, other application.The purpose of present disclosure is PC film (LLDPE and LDPE) to be processed into be close to the blown film product of not using quality, and described blown film product can use separately or use with unworn combination of materials.
For the application's purpose, term " be close to do not use " should refer to the PC film quality compared with the unworn material of blown film product.A kind of test to this quality is visual gel detection test (visual gel detection test).For the application's purpose, " gel " is not melt portions or the unfused pollutant of PC film.In this test, measure the number (irrelevant with its size) of gel at 12 inches * 12 inches square samples.Unworn material has the gel counting between 10 to 0 gels.Intimate unworn material has the gel counting between 1,000 to 11 gel.The PC product that the applicant has compared conventional PC product and produced with the method and apparatus of present disclosure, the result is as follows:
| Film type | The gel counting |
| Conventional PC | 52,740 |
| The PC of present disclosure | 720 |
| Unworn material | 9 |
With reference to accompanying drawing, Fig. 1 is for reclaiming the flow chart that discarded film after the consumption makes it to become an exemplary of the method that is close to the blown film product of not using quality.Fig. 2 is according to flowchart configuration shown in Figure 1 schematic top view for the exemplary of the device layout of processing PC film.Should be understood that the physical layout of equipment as shown in Figure 2 is exemplary, and in the scope of the concrete equipment that utilizes the method for describing herein, expection can arrange other structures or device layout.
The feed of the LLDPE film that the consumption back is discarded or the combination 12 (hereinafter being called " PC film ") of low density polyethylene films or LLDPE and LDPE film is placed on and stores on the conveyer 14.Can be placed on the conveyer 14 by any convenience and conventional method (for example, fork truck, crane, elevator and manually the dispose in some cases) feed with PC film 12.Storage conveyer 14 moves to inclination angle conveyer 15 with the feed of PC film 12.
The feed of PC film 12 generally is to exist with the big packet form that keeps together by retainer belt (retainer band).In typical operation, cut off retainer belt and described big bag is drawn back to carry out initial visual examination.Such process can manually be carried out or carry out with machine, as being determined by the operator.If in the feed of PC film 12, see any non-film object at first, then manually or by machine remove such object.
The feed of opening the PC film 12 of bag is moved to conveyer 15 by storing conveyer 14 subsequently, by or near metal detector 16 so that remove the metal of some form.Metal detector 16 is normally responded to metal detector, and its magnet with several forms is electromagnet for example, to detect and to help to remove automatically iron material.Also expect and also can use the feed with PC film 12 to detect and/or remove the ferrous metal object apart from suitable a series of permanent magnets.For example also can use the detector of other types, the x-X-ray machine X detects non-film object.
Pulverizer 18 is configured to tear the feed of PC film 12, wherein the surf zone of exposed film.Pulverizer 18 also makes the film layering.Because the PC film is folded mutually layer by layer each other in the general shipment packaging process, so pulverizer 18 is configured to make such multilayer layering, even rete is separated from one another.Pulverizer is configured to cut off film, thereby generally makes rete fusion make the cleaning difficulty (if possible) of film.
With 20 the PC film feed through pulverizing is moved to cleaning and transportation screw rod 22 by discharging.The wetting film through pulverizing of described cleaning and transportation screw rod, and film is transported to prerinse/sedimentation/floating groove equipment 24.When in floating/sedimentation 24 equipment, further separate the high density material of not identified by metal detector 16, for example stone, glass or sand, its bottom that is settled down to equipment 24 is to remove subsequently.When in floating/sedimentation/floating groove equipment 24, by stirring further wetting film, for example undertaken by a series of rotation oar.
When in rinse bath 24, by be mixed in the described groove surfactant for example washing agent and other compounds finish the other cleaning of PC film, all contaminants that comes further cleaning film is China ink, adhesive etc. for example.
Thereby surfactant is to be added in the liquid the material with wetting property sprawled that increases liquid with the surface tension that reduces liquid.For example, surfactant is used for disperseing the water slurry of insoluble dyes.Such additive is also softening for the adhesive that label is attached on the PC film.Preferred surfactants will comprise washing agent, oxidant and bleaching agent.Should be understood that described surfactant can comprise other chemicals or additive, comprise ionic and nonionic reagent.Except cleaning PC film, when in sedimentation/floating groove equipment 24, stir the layering of the PC film that also promotes to have the self-adhesion tendency.
After determined a period of time by the operator, PC film fragment is transported to first comminutor 26.Described first comminutor 26 further reduces the size of the PC membrane area that is received from pulverizer and sedimentation/floating groove 24.Typical granular size after first time granulation is about 3/4 inch.Granulation in first comminutor 26 also promotes further separating of wet label and film substrate.The PC film is transported to friction cleaning machine 28 from first comminutor 26.
Clean in friction cleaning machine 28 through the PC of granulation film, described friction cleaning machine 28 disposes the oar formula screw rod of quick operation of the cylindrical hopper of inclination and inclination so that ground material dehydration and the cleaning of discharging from first comminutor 26.Described screw rod by bearing fixing in housing and be encapsulated in the stainless steel sift.Through pulverizing and material and the water of granulation, described screw rod is upwards carried described material and with certain speed for example 1,000rpm spins in the feeding of the lower end of described hopper.
When the PC of granulation film is transported to the outlet at hopper top, it is cleaned in friction cleaning machine 28.Pollutant and water pass trickle stainless steel sift to trough sidewalls, and the PC film is further cleaned in the friction of high-speed screws simultaneously.Should be understood that friction cleaning machine 28 can be positioned at before or after the rinse bath.As shown in Figure 1, friction cleaning machine 28 is positioned at after the turbine cleaning machine 30.Friction cleaning machine 28 also is positioned at after the wet milk 26, as shown in Figure 1.In Fig. 2, turbine cleaning machine 30 is positioned at after the friction cleaning machine 28.
The feed of the PC film 12 of granulation moves to hydrocyclone by pump 32, and it is also referred to as hydraulic cyclone machine 34, for example the hydraulic cyclone machine produced of Herbold Meckesheim.Hydraulic cyclone machine 34 moves under the hydraulic pressure that comes self-pumping 32, and described pump 32 spiral mobile water are with further separating contaminants and PC film, and further separates the layer of PC film by the revolving force of the mobile water in the hydraulic cyclone machine 34.
The PC film leaves hydraulic cyclone machine 34 in the upper end of hydraulic cyclone machine 34 with main current, and the material of any sedimentation (material of higher density) is in the lower end.Hydraulic cyclone machine 34 and pump 32 and turbine cleaning machine 30 cooperations are to provide the other cleaning of PC film and pollutant is separated with the PC film.Water from hydraulic cyclone machine 34 continues to carry pollutant to vibrosieve equipment 38 and second friction cleaning machine 36.
Available cold water or hot water come operating turbine cleaning machine 30.Under the situation of hot bath, temperature range can be 120 °F to 170 °F, and preferred temperature is at least 140 °F but is no more than about 190 water temperature.Except giving the rotatablely moving of PC film, hot water also is used for influencing the other cleaning of PC film in cleaning machine.The temperature that surpasses 190 tends to make the distortion of PC film and/or fusing.
After leaving second friction cleaning machine 36, the PC film deposits in second turbodrier 40.Described turbodrier 40 is removed moisture from the PC film, and by pneumatic conveyer system 42 the PC film is deposited in second turbodrier 44.Second turbodrier 44 is removed other moisture from the PC film.Present PC film is sheet form usually, and deposits in film thin slice buffering silo (silo) 48 subsequently.
Carry out other drying in hot drying equipment 46, described hot drying equipment 46 usefulness heat is removed other moisture from the PC thin slice.A series of dispatchtudes and system 42 are connected to each other first turbodrier 40, second turbodrier 44, hot drying equipment 46 and film thin slice buffering silo 48.Should be understood that other turbodrier can be installed in the system and with dispatchtude with hot drying equipment and be connected.
Pneumatic conveyer system pipe 42 moves to plastics compacting machine (plastcompactor) equipment 50 with PC film thin slice from film thin slice buffering silo 48, and described plastics compacting machine equipment 50 can be any such commercially available device.In a kind of such plastics compacting machine, described plastics compacting machine 50 utilize rotating disc and fixedly the compacting dish move, two dishes all dispose be suitable for screw rod with removable kneading track (kneading rail).The PC film is transported center by fixed disk continuously from charging silo 48, enter the machining area of plastics compacting machine 50 by feed worm.By and the friction of compacting dish and the friction between the compacting dish, material is heated rapidly.Operation in plastics compacting machine equipment therebetween, the PC material heats up and begins because of friction and softens.The PC surface begins fusion, causes vermiform to form thing.Other heating in plastics compacting machine 50 has also reduced the moisture in the PC film.In the typical operation of described method, the water capacity of PC film is no more than 10 weight % in this article.
Vermiform is formed thing move to second comminutor 52 from plastics compacting machine equipment 50, described second comminutor 52 forms the size that thing is decreased to required agglomeration granulate with described vermiform.Select the concrete size of agglomeration PC film by the sieve that changes second comminutor, 52 inside.Plastics compacting machine equipment 50 from the PC film further remove any other moisture and under the situation that does not add water with drying to grind mould real in being close to the granulate of the blown film product of not using quality.
In an embodiment of described method, controller 54 is used for a plurality of functions of control appliance, comprises water temperature, air pressure time period, concrete processing particle size and the speed of service.
In another embodiment, water treatment facilities 60 are connected to a plurality of cleaning equipments, are used for described intrasystem water to continue use with circulation and filtration.Water quality with difference, is controlled circulation and the filtration of water by the operator and/or with controller 54 couplings in the different phase of process.
In another embodiment, one or more testing station is installed with the quality of the PC film in the test processing.A kind of such test is above-mentioned " gel counting " test, yet, can determine to utilize other suitable tests by the operator.The testing station can be connected to monitor automatically, test and report the result by Configuration Control Unit 54 with controller 54.Generally determined to test in a plurality of stages of process by the operator.
For the purpose of present disclosure, term " connection " means two parts (electricity or machinery) and directly or indirectly mutually combines.This combination can be fixing character or removable character.Can link to realize this combination mutually by two parts (electricity or machinery) and any other intermediate member are integrally formed each other to single monolithic entity or described two parts and any other member.This combination can be permanent nature, perhaps alternatively, but is removable or releasing properties.
Although illustrated and described the foregoing description of the inventive method and equipment with reference to specific embodiment and application thereof, but it provides with purpose of description for example, but not is intended to exhaustive or present disclosure is limited to disclosed specific embodiments and applications.It is evident that for the person of ordinary skill of the art, only otherwise depart from the spirit or scope of present disclosure, can carry out multiple change, modification, variation or change to the method and apparatus of describing herein.Select and describe specific embodiment and use to provide the best illustrated to our ratio juris and practical application thereof, thereby make those of ordinary skills to utilize method and apparatus and various change in a plurality of embodiments according to the concrete purposes that is suitable for expecting.Therefore, when explaining according to the width of giving fair, legal and of equal value, all these change, revise, change and change should be regarded as within the scope of the determined present disclosure of appending claims.
Claims (20)
1. the feed for LLDPE film discarded after will consuming or low density polyethylene films is processed into the method that is close to the blown film product of not using quality, and described method comprises:
In pulverizer, tear the feed of described film, wherein expose the surf zone of described film, comprise making described film layering;
In the water-bath that contains surfactant, clean the film through tearing and in described bath, stir described film, wherein remove pollutant from described film;
Grind described film and in the spin friction cleaning machine, clean film through grinding, wherein remove other pollutant from described film;
Dry described film through grinding; With
The mould that grinds with drying under the situation that does not add water is the intimate granulate of not using the blown film product of quality in fact.
2. the method for the feed that is used for the described film of processing of claim 1, wherein said water-bath comprises a plurality of cleaning machines.
3. the method for the feed that is used for the described film of processing of claim 2 contains one of at least hot water in the wherein said cleaning machine.
4. the method for the feed that is used for the described film of processing of claim 3, wherein said hot water are at least 140 °F but be no more than 190 °F.
5. the method for the feed that is used for the described film of processing of claim 1 also comprises from the feed of described film and detects metal, and comprises that the feed that makes described film stands magnetic field with the identification ferrous metal.
6. the method for the feed that is used for the described film of processing of claim 5 also comprises removing detected metal, comprise that machine removes and manually remove in one of.
7. the method for the feed that is used for the described film of processing of claim 1, the plastic foil that grinds of wherein said drying contains the water content that is no more than 10 weight %.
8. the method for the feed that is used for the described film of processing of claim 1 also is included in described compacting step and makes described granulate be configured as pill afterwards.
9. the discarded film after being used for consume is processed into the intimate method of not using the blown film product of quality, and described method comprises:
One of provide in the feed of the feed of callable LLDPE plastic foil and callable LDPE film;
From the feed of described plastic foil, remove metal;
After removing metal, pulverize the feed of described plastic foil, thereby wherein described plastic foil is torn the surf zone of exposed film;
Plastic foil through pulverizing is discharged in the water-bath by screen;
At all surface of described stirred in water bath water with wetting described plastic foil through pulverizing;
From described water-bath, take out described plastic foil;
The described plastic foil of wet-milling;
In the spin friction cleaning machine, clean the plastic foil through grinding, wherein from described plastic foil, remove pollutant;
In the hydraulic cyclone machine, separate at least two kinds of dissimilar plastic foils that grind through cleaning, lighter plastic foil is separated with heavier plastic foil;
The dry described plastic foil that grinds through cleaning; With
The plastic foil compacting that grinds with described drying under the situation that does not add water is the intimate granulate of not using the plastic foil of quality, and wherein said granulate is stored or is used as the raw material in the blown film operation.
10. the method that is used for the discarded film after processing is consumed of claim 9 also comprises in described water-bath adding additive.
11. the method that is used for the discarded film after processing is consumed of claim 10, wherein said additive is washing agent.
12. the method that is used for the discarded film after processing is consumed of claim 9, wherein said water-bath comprises a plurality of cleaning machines.
13. the method that is used for the discarded film after the processing consumption of claim 12 contains one of at least hot water in the wherein said cleaning machine.
14. the method that is used for the discarded film after the processing consumption of claim 13, wherein said hot water are at least 140 °F but be no more than 190 °F.
15. the method that is used for the discarded film after processing is consumed of claim 9, the wherein said metal that removes comprises that the feed that makes described plastic foil stands magnetic field with the identification ferrous metal.
16. the method that is used for the discarded film after processing is consumed of claim 9, the plastic foil that grinds of wherein said drying contains the water content that is no more than 10 weight %.
17. the method that is used for the discarded film after the processing consumption of claim 9, wherein said remove metal comprise that machine removes and manually remove in one of.
18. the method that is used for the discarded film after processing is consumed of claim 9 also is included in described compacting step and makes described granulate be configured as pill afterwards.
19. the discarded film after being used for consume is processed into the intimate method of not using the blown film product of quality, described method comprises:
One of provide in the feed of the feed of callable LLDPE plastic foil and callable LDPE film;
From the feed of described plastic foil, remove metal;
After removing metal, pulverize the feed of described plastic foil, thereby wherein described plastic foil is torn the surf zone of exposed film;
Plastic foil through pulverizing is discharged in the water-bath by screen;
At all surface of described stirred in water bath water with wetting described plastic foil through pulverizing, described water-bath comprises surfactant additive, and described additive comprises washing agent, oxidant and bleaching agent;
From described water-bath, take out described plastic foil;
The described plastic foil of wet-milling;
In the spin friction cleaning machine, clean the plastic foil through grinding, wherein from described plastic foil, remove pollutant;
In the hydraulic cyclone machine, separate at least two kinds of dissimilar plastic foils that grind through cleaning, lighter plastic foil is separated with heavier plastic foil;
The dry described plastic foil that grinds through cleaning makes described film contain the water content that is no more than 10 weight %; With
The plastic foil compacting that grinds with described drying under the situation that does not add water is the intimate granulate of not using the plastic foil of quality, and wherein said granulate is stored or is used as the raw material in the blown film operation.
20. the method that is used for the discarded film after processing is consumed of claim 19 also is included in described compacting step and makes described granulate be configured as pill afterwards.
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| CN2012100521601A CN103286883A (en) | 2012-03-01 | 2012-03-01 | Recycling method of consumed and discarded films |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100521601A CN103286883A (en) | 2012-03-01 | 2012-03-01 | Recycling method of consumed and discarded films |
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| CN2012100521601A Pending CN103286883A (en) | 2012-03-01 | 2012-03-01 | Recycling method of consumed and discarded films |
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Cited By (6)
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| CN103640104A (en) * | 2013-12-30 | 2014-03-19 | 甘肃宏鑫农业科技有限公司 | Method for recycling, cleaning and granulating waste mulching films |
| CN104354240A (en) * | 2014-10-22 | 2015-02-18 | 江苏凯力高分子科技有限公司 | Film milling device and film milling process for removing contaminated film layer on surface of plastic tape |
| CN104494000A (en) * | 2014-12-03 | 2015-04-08 | 王芙蓉 | Method for treating abandoned mulching film |
| CN105196442A (en) * | 2014-06-02 | 2015-12-30 | 江苏拓邦新材料有限公司 | Cleaning method of waste and old polyethylene film |
| CN104354240B (en) * | 2014-10-22 | 2017-01-04 | 江苏凯力新型材料科技有限公司 | A kind of milling film device removing plastic band surface contamination film layer and milling membrane process |
| CN108145883A (en) * | 2017-12-26 | 2018-06-12 | 宁波高新区新柯保汽车科技有限公司 | For the equipment of waste plastic processing |
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| CN103640104A (en) * | 2013-12-30 | 2014-03-19 | 甘肃宏鑫农业科技有限公司 | Method for recycling, cleaning and granulating waste mulching films |
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| CN104354240B (en) * | 2014-10-22 | 2017-01-04 | 江苏凯力新型材料科技有限公司 | A kind of milling film device removing plastic band surface contamination film layer and milling membrane process |
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| CN108145883A (en) * | 2017-12-26 | 2018-06-12 | 宁波高新区新柯保汽车科技有限公司 | For the equipment of waste plastic processing |
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