EP2912102A1 - Procédé de granulation de polymères et produit issu de ce procédé - Google Patents
Procédé de granulation de polymères et produit issu de ce procédéInfo
- Publication number
- EP2912102A1 EP2912102A1 EP13801613.4A EP13801613A EP2912102A1 EP 2912102 A1 EP2912102 A1 EP 2912102A1 EP 13801613 A EP13801613 A EP 13801613A EP 2912102 A1 EP2912102 A1 EP 2912102A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymers
- water
- volatile organic
- granulation
- organic compounds
- 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.)
- Ceased
Links
- 229920000642 polymer Polymers 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 53
- 238000005469 granulation Methods 0.000 claims abstract description 16
- 230000003179 granulation Effects 0.000 claims abstract description 16
- 238000004064 recycling Methods 0.000 claims abstract description 10
- 239000012855 volatile organic compound Substances 0.000 claims description 33
- 239000003973 paint Substances 0.000 claims description 32
- 230000007547 defect Effects 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 21
- 239000004743 Polypropylene Substances 0.000 claims description 16
- 239000003344 environmental pollutant Substances 0.000 claims description 16
- 231100000719 pollutant Toxicity 0.000 claims description 16
- -1 polypropylene Polymers 0.000 claims description 16
- 229920001155 polypropylene Polymers 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 13
- 238000012360 testing method Methods 0.000 claims description 10
- 230000016571 aggressive behavior Effects 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 9
- 206010001488 Aggression Diseases 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 239000002966 varnish Substances 0.000 claims description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 4
- 150000001336 alkenes Chemical class 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 2
- 239000001569 carbon dioxide Substances 0.000 claims description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 2
- 239000011651 chromium Substances 0.000 claims description 2
- 229910052804 chromium Inorganic materials 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 229920001519 homopolymer Polymers 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 239000003925 fat Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000010410 layer Substances 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 150000002894 organic compounds Chemical class 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013019 agitation Methods 0.000 description 2
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 241000282461 Canis lupus Species 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000013502 plastic waste Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- 239000002699 waste material 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
-
- 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
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- 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
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- 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
- B29B9/16—Auxiliary treatment of granules
- B29B2009/168—Removing undesirable residual components, e.g. solvents, unreacted monomers; Degassing
-
- 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
- B29B2017/0293—Dissolving the materials in gases or liquids
-
- 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
-
- 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
- B29K2105/26—Scrap or recycled material
-
- 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
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3044—Bumpers
-
- 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
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/30—Polymeric waste or recycled polymer
-
- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- 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
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/254—Polymeric or resinous material
Definitions
- the present invention relates to a method of granulating a polymeric material.
- Post-consumer material as defined in Article 7.8.1.1 of ISO 14021 ("Environmental Marking and Declarations - Self-declarations of the Environment (Type II Labeling)" means "a material generated by the household or by commercial, industrial or institutional facilities in their role as end user of the product, and which can no longer serve the purpose for which it was designed. This includes material returns from the distribution chain. Such a material is distinguished from a "preconsumer” material as defined in the same article of the standard, namely a "material diverted from the waste stream during the manufacturing process.”
- the polymers obtained from "post-consumer” materials could not be used for the manufacture of coated parts, accepting no appearance defects, or at least not at high concentrations.
- the invention solves this problem.
- the subject of the invention is a method for granulating polymers from a ground material of "post-consumer” material, characterized in that it comprises a step of extracting volatile organic compounds, and / or salts dissolved and / or small unmelted, present at the heart of polymers.
- the granulation process is carried out after sorting, grinding, separating, washing, drying, and other steps, already known for the recycling of plastics. Crushed from the previous steps are introduced into an extruder in which they are kneaded and melted and come out in the form of granules ready to enter the manufacture of parts containing recycled plastic.
- Such a method makes it possible to reduce, in polymers derived from "post-consumer” materials, the presence of the pollutants represented by volatile organic compounds (VOCs), dissolved and unmelted salts of small size, which the inventors have observed origin of appearance defects of the parts made in these polymers.
- VOCs volatile organic compounds
- Decree No. 2006-623 of 29/05/2006 on the reduction of emissions of volatile organic compounds due to the use of organic solvents in certain varnishes and paints and in vehicle refinishing products, defines an organic compound volatile as "any organic compound whose initial boiling point, measured at the standard pressure of 101.3 kPa, is less than or equal to 250 ° C".
- the NF ISO 16000-6 standard of 05/01/2005 defines volatile organic compounds according to their boiling point and distinguishes, according to the classification adopted by the World Health Organization in 1989, semi-volatile organic compounds whose boiling point is between (240 ⁇ 260 ° C) (380 ° C to 400 C q), volatile organic compounds having a boiling point between (50 ° C to 100 ° C) and (240 ° C to 260 ⁇ €) and very volatile organic compounds having a boiling point between ⁇ 0 ⁇ € and (50 ⁇ € 100 ⁇ €).
- the volatile organic compounds of the present invention may be one or the other of the semi-volatile organic compounds, volatile organic compounds and highly volatile organic compounds defined in this standard.
- volatile organic compound is understood to mean a compound which enters a definition according to at least one of these three texts.
- the volatile organic compounds that are to be extracted according to the present invention may be alkanes or alkenes, in particular oligomers of alkane or alkene type. They can be esters of fatty acids, silicones or mineral oils from motor oils.
- the inventors have discovered that the passage in the paint strings of parts having a high concentration of polymers from "post-consumer” materials causes pollution of the paint line. Indeed, they observed that after the passage of such parts, any subsequent virgin material, passing through the paint line, has defects in appearance. The invention removes this disadvantage by preserving the paint line of this pollution.
- the extraction step takes place in an extruder by adding a fluid or a mixture of fluids which solubilizes them and / or drives them, the pollutants thus extracted being evacuated under atmospheric pressure or under vacuum in progress extrusion, before passing into an extrusion head.
- the fluid used for the extraction is thus very effective. Indeed, the extraction taking place at the extrusion temperature, the polymer to be recycled is in the molten state but the impurities initially trapped in the core are not necessarily. They can then be brought into contact with the fluid or the mixture of fluids, and be driven. Moreover, at this temperature, the thermal agitation increases and, under the combined action of the thermal agitation and the kneading elements of the extruder, the probability of encounter between the impurity molecules and the solvent increases, which facilitates entrainment of impurities by the solvent.
- this depollution process is globally very efficient because it intervenes at the end of the recycling process. Indeed, some stages of recycling can generate pollutants. The extraction taking place at the end of the recycling process, this one focuses on the pre-existing pollutants in the polymer to be recycled and also on the possible pollutants generated during recycling.
- the fluid can be easily recycled.
- the pollutants precipitate or decant.
- the fluid is water or a mixture containing water, introduced into the extruder at a pressure greater than that present in the extruder.
- the pressure in the extruder is generally greater than 1.5 bar.
- the water is added in the following proportions:
- the material to be extruded contains more than 0,55% and up to 0,7% mass of volatile organic compounds: from 60 g of water per kg of extruded material.
- the fluid is liquid carbon dioxide, liquid nitrogen, acetone, alcohol, and more specifically methanol, ethanol or butanol, or a mixture containing at least one of these fluids.
- the fluid or mixture of fluids is added last, including after any additives.
- the fluid or the mixture of fluids is added in the second half of the length of the extruder, preferably to about two-thirds of the extruder.
- the volatile organic compounds to be extracted are molecules with a molar mass of less than 400 g / mol.
- the polymers to be granulated are polyolefins (homopolymers or copolymers of olefins), and preferably polypropylene.
- Another subject of the invention is a process for recycling polymers from "post-consumer” materials, characterized in that it comprises a granulation step as defined above.
- the subject of the invention is also a material derived from the process described above.
- the invention also relates to a part made of this material.
- the present invention also relates to a motor vehicle part made of polymers from the recycling of polymers from "post-consumer” materials.
- this new destination for recycled polymers could increase the overall volumes of recycled plastics and therefore take greater advantage of the benefits of plastic recycling, namely the limitation of the use of natural fossil fuels and the reduction of the volume of plastic waste, which is not very degradable and is responsible for pollution.
- An object of the present invention is therefore to provide parts for motor vehicles, from polymers from "post-consumer” materials.
- the subject of the invention is an automobile part having, after coating with paint, varnish, chromium plating or a decorative film, the following appearance requirements:
- the gloss is measured using a Microgloss 20 ° glossmeter or Byk Gardner Microtrigloss, Labomat Essor REFO 3 or Minolta Multigloss 268, under the conditions of use indicated by the manufacturer.
- the Calibration Standard is an opaque black glass plate with a flat and polished surface, which must be at least 5 mm thick, and is accompanied by its own gloss values for the 20 ° angle, certified by organizations such as the National Research Council (NRC Canada) and the Bundesweg fur Materialforschung und-Prufung (BAM Germany).
- the surface to be measured is prepared by washing with soapy water or with a suitable product that does not alter the surface, rinsed, wiped and dried. The measurement is made in a site out of the reach of direct lighting.
- the gloss meter is turned slightly so as to obtain the maximum value of the point considered, which will be the value recorded for this point.
- the substrate is considered to be the bare part of the body to which the coating and the film is applied which is the continuous film resulting from the application on the substrate of one or more layers of coating (in general the primary layer, the base and varnish).
- the film of paint is incised until the substrate to form a grid and the adhesion of the squares of the network is appreciated.
- the tests are performed in a room at a temperature of 21 ⁇ C and 25 q C. The test must be performed in three different places of the specimen. Six parallel incisions are made, followed by six incisions overlapping the initial 90 ° incisions. The spacing of the incisions should be as follows:
- Adhesive tape having a tack between 600 g / cm and 750 g / cm (according to standard NF EN 1939) is then used.
- the center of the adhesive tape is placed on the grid, parallel to one of the incision directions, and is adhered to the grid and around for a length of at least 20 mm, smoothing it with the rounded edge of a wooden piece.
- the membership time is at least one minute. Within five minutes after application of the adhesive tape, it is removed by taking the free end and tearing quickly, in 0.5 to 1 second, at an angle as close as possible to 60 °.
- the inventors have found that in coated parts, using polymers from "post-consumer” materials at a rate of 30% or more, defects in appearance due to the presence of foreign bodies, flakes and bodies are detected. unmelted.
- the following defects of appearance are thus defined: the grains are defects due to small dusts which are found on the surface of the injected polymer which either remain on the surface of the substrate or are deposited between two successive layers the film and create a defect of appearance by deformation thereof, or are deposited on the last layer of the paint film,
- loupes are defects due to a local decrease in the thickness of the paint film; this decrease reflects a pollution on the surface of the substrate which changes the surface tension of the polymer and prevents a good spreading of the paint,
- the particles are due to the presence of solid impurities which are incompatible with the injected polymer and create appearance defects by deformation of the surface of the substrate and therefore of the paint film.
- Table 1 shows the impact of the percentage of polymers derived from a ground of "post-consumer” materials on the appearance of automobile parts. It also shows the incidence of treatment by the granulation process on the appearance of these same parts. These aspect data represent the synthesis of the values obtained on several hundred polypropylene automobile parts. All aspect data measurements were performed according to the previously described methods. Table 1
- the appearance data of parts containing 30% of recycled polypropylene that is to say from a ground of "post-consumer” materials, having not undergone extraction of pollutants according to the invention .
- the gloss data, held to external aggression comply with the appearance requirements that are sought to achieve through the invention.
- the density of defects is greater than the accepted density (greater than 4 defects / m 2 ) and the peeling of the paint film after the part has been subjected to a pressure washer is superior. with the detachment accepted, in surface taken off on the set of crosses and in surface taken off on at least one of the crosses. It is also noted that the paint line is polluted.
- the third line are given the appearance data of parts made entirely of recycled polypropylene that has not been extracted from the pollutants according to the invention.
- the aspect data does not conform to the appearance requirements that are sought to be achieved by the invention.
- the paint line is polluted after passing these parts.
- Table 2 shows the impact of the amount of water used in the extraction of pollutants according to the invention on the appearance of automobile parts. These aspect data represent the synthesis of the values obtained on several hundred polypropylene automobile parts. All aspect data measurements were performed according to the previously described methods. Table 2
- the appearance data of automobile parts including 30% recycled polypropylene was recorded.
- the data are different depending on the amount of water added to the extruder for the extraction of pollutants according to the invention.
- the amount of water required varies depending on the percentage of VOC in the material to be extruded.
- the treatment with 60 g of water per kg of recycled polypropylene material containing 0.70% of VOC makes it possible to obtain aspect data in accordance with the desired appearance requirements.
- the passage on the paint line of these parts does not cause pollution of the chain.
- the treatment with 59 g of water per kg of recycled polypropylene material containing 0.70% of VOC does not make it possible to achieve the appearance requirements in terms of the density of defects and the detachment of the film. after the workpiece has been subjected to a pressure washer.
- the maximum density of defects accepted in the visible areas of visible parts is 3 defects per m 2 .
- Aspect areas are areas of the visible faces of parts visible by an adult observer standing at the side of the vehicle that are characterized by having a flat or convex surface with a radius of curvature greater than 500 mm.
- the part is a bodywork part.
- FIG 1 is a schematic representation of a device according to the invention
- FIG 2 is a perspective front view of a vehicle front bumper automobile
- FIG. 3 is a front perspective view of a front bumper of a motor vehicle
- FIG 4 is a perspective front view of a rear bumper of a motor vehicle.
- Figures 5 to 7 are representations of appearance defects.
- FIG. 5 is an enlarged sectional view of a magnifying glass type defect.
- FIG. 6 is an enlarged sectional view of a particle-type defect.
- FIG. 7 is an enlarged sectional view of a grain type defect.
- FIG. 1 shows an extrusion device according to the invention, designated by the general reference 10.
- the device 10 forms an extruder and comprises a stator 12 forming a sleeve 14 and a rotor 16 forming a system of screws (single screw or twin screw) endless
- the screw 18 is rotatable in the sleeve 14.
- the sleeve 14 and the screw 18 define an annular space 19 in which progresses a composition to extrude.
- the device 10 comprises an upstream main inlet 20 suitable for the introduction of compounds, in this case crushed and optionally some additives conventionally added during extrusion, such as oxidants.
- the device 10 comprises a hopper 22 allowing the introduction of mills and additives into the main inlet 20.
- the device also comprises an outlet 31 provided with an extrusion head 24 equipped with a die 33.
- the device 10 comprises a first intermediate inlet 26 arranged just downstream of the main inlet 20.
- the first intermediate inlet 26 is suitable for the introduction of an additive.
- the device 10 also comprises a second intermediate inlet 28 arranged downstream of the main inlet 20 and the first intermediate inlet 26.
- the second intermediate inlet 28 is suitable for the introduction of water under pressure.
- the device 10 finally comprises an outlet 32 leading to a vacuum pump, able to evacuate the mixture of water and pollutants extracted during extrusion.
- Figure 2 is a perspective view of a front bumper 1 of a motor vehicle. Zones 2 and 3 correspond to the appearance zones of the bumper 1.
- Figure 3 is a perspective view of a front bumper 4 of a motor vehicle. Zones 5 and 6 correspond to the appearance zones of the bumper 4.
- FIG 4 is a perspective view of a rear bumper 7 of a motor vehicle. Zones 8 and 9 correspond to the appearance zones of the bumper 7. Zones 1 to 6 correspond to the appearance zones of said bumpers.
- FIG. 5 is an enlarged cross-sectional view on a 30: 1 scale of an outer portion of a painted body part 1 made of a substrate 2 and a paint film 3.
- the thickness of the film of FIG. paint 3 varies between the points B and C at which it is equal to 100 ⁇ . It is equal to 0 ⁇ at point A.
- outside segment [BC] the thickness of the film is constant.
- the part of the paint film located between the points B and C, extending over a length of 0.6 mm, is a schematic representation of a magnifying glass defect 4.
- Figure 6 shows an enlarged 30: 1 sectional view of an exterior portion of a painted body part 1 made of a substrate 2 and a paint film 3.
- the substrate 2 of this figure unlike that of Figure 5, does not have a rectilinear surface. Its surface appears curved in the part extending from the point D to the point E located at the right of an impurity 5.
- the part of the paint film extending from the point E to the point F, over a length of 1, 8 mm, is deformed. This is a schematic representation of a particle-like defect.
- Fig. 7 shows an enlarged sectional view at the 75: 1 scale of an outer portion of a painted body part 1 made of a substrate 2 and a paint film 3.
- the paint film has a constant thickness of 93 ⁇ .
- a dust 7 is deposited on the last layer of the paint film.
- This defect extending from the points F to G over a length of 0.2 mm, is a schematic representation of a grain type defect 8.
- the other causes of grain-type defects namely the presence of a dust on the surface of the substrate or between two successive layers of the paint film, creating a defect of appearance by deformation of the paint film, are not represented.
- the invention is not limited to the embodiments described above. Indeed, the volatile organic compounds, dissolved and / or unmelted salts of small size can be extracted through the use of another fluid than water or a mixture of fluids.
- the granulation process can be used in the manufacture of other parts than motor vehicle body parts and even parts intended for fields other than that of the automobile.
- the granulation process can be applied to other polymers than polypropylene.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Environmental & Geological Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1260275A FR2997403A1 (fr) | 2012-10-26 | 2012-10-26 | Procede de granulation de polymeres et produit issu de ce procede |
FR1260331A FR2997404B1 (fr) | 2012-10-26 | 2012-10-30 | Procede de granulation de polymeres et produit issu de ce procede |
PCT/FR2013/052544 WO2014064389A1 (fr) | 2012-10-26 | 2013-10-23 | Procédé de granulation de polymères et produit issu de ce procédé |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2912102A1 true EP2912102A1 (fr) | 2015-09-02 |
Family
ID=47557281
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13801613.4A Ceased EP2912102A1 (fr) | 2012-10-26 | 2013-10-23 | Procédé de granulation de polymères et produit issu de ce procédé |
Country Status (5)
Country | Link |
---|---|
US (1) | US10189970B2 (fr) |
EP (1) | EP2912102A1 (fr) |
CN (1) | CN105164185B (fr) |
FR (2) | FR2997403A1 (fr) |
WO (1) | WO2014064389A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3000495B1 (fr) * | 2012-12-28 | 2015-12-11 | Plastic Omnium Cie | Procede de recyclage de polymeres et produit issu de ce procede |
US20170002116A1 (en) * | 2015-06-30 | 2017-01-05 | The Procter & Gamble Company | Articles of Reclaimed Polypropylene Compositions |
WO2022015529A1 (fr) * | 2020-07-15 | 2022-01-20 | Dow Global Technologies Llc | Procédé d'élimination des contaminants d'un thermoplastique contaminé |
BR112023024280A2 (pt) * | 2021-06-22 | 2024-01-30 | Dow Global Technologies Llc | Processo para separar e recuperar pelo menos um componente de polímero |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6369192B1 (en) * | 1995-10-27 | 2002-04-09 | Praxair Technology, Inc. | Methods for removing contaminants from polymers |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3683511A (en) * | 1970-09-04 | 1972-08-15 | Firestone Tire & Rubber Co | Method of removing volatiles from an elastomer |
DE4207370A1 (de) * | 1992-03-09 | 1993-09-16 | Feinchemie Schwebda Gmbh | Verfahren zur entfernung von pflanzenschutzmitteln von mit pflanzenschutzmitteln verunreinigten kunststoffbehaeltern |
US5424013A (en) | 1993-08-09 | 1995-06-13 | Lieberman; Mark | Thermoplastic closed loop recycling process |
DE19651571A1 (de) * | 1996-12-11 | 1998-06-18 | Kerec Kunststoff Und Elektroni | Recyclingverfahren |
DE60018467T2 (de) | 1999-12-23 | 2006-02-16 | Mobius Technologies, Inc. | Behandlung von polymerschaum |
US6919383B2 (en) | 2001-04-10 | 2005-07-19 | North Carolina State University | CO2-assisted deploymerization, purification and recycling of step-growth polymers |
CN101204837B (zh) | 2007-10-12 | 2010-05-19 | 东莞市蓝冠机械设备有限公司 | 废弃高发泡塑料再生造粒工艺 |
CN101863091A (zh) * | 2010-06-12 | 2010-10-20 | 广州丽盈塑料有限公司 | 包装级高密度聚乙烯及聚丙烯的回收方法 |
-
2012
- 2012-10-26 FR FR1260275A patent/FR2997403A1/fr active Pending
- 2012-10-30 FR FR1260331A patent/FR2997404B1/fr active Active
-
2013
- 2013-10-23 EP EP13801613.4A patent/EP2912102A1/fr not_active Ceased
- 2013-10-23 WO PCT/FR2013/052544 patent/WO2014064389A1/fr active Application Filing
- 2013-10-23 US US14/438,137 patent/US10189970B2/en active Active
- 2013-10-23 CN CN201380068589.2A patent/CN105164185B/zh active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6369192B1 (en) * | 1995-10-27 | 2002-04-09 | Praxair Technology, Inc. | Methods for removing contaminants from polymers |
Non-Patent Citations (1)
Title |
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See also references of WO2014064389A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN105164185A (zh) | 2015-12-16 |
FR2997404A1 (fr) | 2014-05-02 |
CN105164185B (zh) | 2017-10-03 |
US10189970B2 (en) | 2019-01-29 |
FR2997404B1 (fr) | 2015-11-06 |
WO2014064389A1 (fr) | 2014-05-01 |
US20150267028A1 (en) | 2015-09-24 |
FR2997403A1 (fr) | 2014-05-02 |
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