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WO1994020276A1 - Uilisation de dechets de mousses dans des corps moules - Google Patents

Uilisation de dechets de mousses dans des corps moules Download PDF

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Publication number
WO1994020276A1
WO1994020276A1 PCT/EP1994/000629 EP9400629W WO9420276A1 WO 1994020276 A1 WO1994020276 A1 WO 1994020276A1 EP 9400629 W EP9400629 W EP 9400629W WO 9420276 A1 WO9420276 A1 WO 9420276A1
Authority
WO
WIPO (PCT)
Prior art keywords
foam
residues
waste
plasticized
filler
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
Application number
PCT/EP1994/000629
Other languages
German (de)
English (en)
Inventor
Clemens Becker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AU62578/94A priority Critical patent/AU6257894A/en
Publication of WO1994020276A1 publication Critical patent/WO1994020276A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/0005—Direct recuperation and re-use of scrap material during moulding operation, i.e. feed-back of used material
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • 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
    • 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
    • B29K2511/00—Use of natural products or their composites, not provided for in groups B29K2401/00 - B29K2509/00, as filler
    • B29K2511/14—Wood, e.g. woodboard or fibreboard
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Definitions

  • the invention relates to a process for the production of dimensionally stable molded articles using foam waste and / or foam residues, and to the molded articles produced according to this process.
  • Foams such as are widely used in various branches of technology, are described, for example, in Ullmann's "Encyclopedia of Industrial Chemistry", 5th edition, Volume All, page 435 ff (1988). These materials essentially represent two-phase systems based on a highly polymeric, organic matrix.
  • the main area of application is the construction sector, in which the foams as such or in a "sandwich combination", for example as integral foam with other materials for thermal insulation, sound insulation or joint sealing be used.
  • the foams are also used in the furniture construction or automotive sector for the manufacture of seating furniture and vehicle seats or in the packaging material sector for a wide variety of purposes due to the resistance to impact stress.
  • Thermoplastic foams are characterized in that they can be plasticized and / or melted without decomposition at higher temperatures.
  • the production and processing of foams often results in a more or less large amount of foam residues and / or foam waste, the recycling of which is problematic.
  • loc. Cit.” is known, for example, based on foam waste Expandable polystyrene, which is produced in production plants, is to be reused, mixed with pre-expanded pearls and fed back into the foaming process.
  • this type of recovery cannot be used equally for all foam residues and / or foam waste.
  • thermoplastic composite materials which are characterized in that first a certain, preselected amount of an expanded thermoplastic material with a first amount of fillers up to 60% by weight, based on the mixture is dry mixed at room temperature so that the filler particles mix uniformly in the thermoplastic parts.
  • the mixture is formed into a thermoplastic composite material with heating and printing.
  • Polystyrene foam wastes which can be broken into pieces with the aid of a paper shredder are mentioned as thermoplastic material.
  • the filler particles include wood chips, cellulose, carbon, polyaramid material and glass fibers. The compression can be carried out in two stages, for example.
  • EP-0 172 436 A2 describes a process for the production of webs from wood flour filled polypropylene by introducing wood flour, which has a water content of 2 to 10% by weight and an average particle size of less than 100 ⁇ m, in a polypropylene melt stream, Cool off and solidify the volatile components by means of two degassing nozzles, one of which is arranged in front of and one behind the entry point of the wood flour.
  • the resulting thermoformable webs can be further processed into motor vehicle parts. Compressing the mixture of foam wastes and / or foam residues possibly containing blowing agent residues represents an extraordinary technical problem, since it is extremely difficult to produce a homogeneous mixture of the components.
  • thermoplastic foam wastes and / or foam residues possibly containing blowing agent residues by a) compressing the foam wastes and / or foam residues, b) plasticizing and degassing the foam wastes and / or Foam residues by heating, c) mixing the plasticized foam waste and / or foam residue with a filler selected from wood flour, thermosetting plastic waste.
  • a filler selected from wood flour, thermosetting plastic waste.
  • thermoplastics with the addition of blowing agents.
  • blowing agents are basically divided into physical and chemical blowing agents.
  • the latter contain chemical compounds which are usually decomposable at a higher temperature, for example in the range from 100 to 250 ° C., and thereby develop gases.
  • the greatest importance as a chemical blowing agent is azodicarboxylic acid diamide, which develops nitrogen and carbon monoxide at temperatures of around 200 ° C.
  • the moldings produced in this way still contain more or less large amounts of undecomposed chemical blowing agent, which, however, exerts an extremely disruptive influence in the subsequent recycling, since local plastic evolution occurs during the plasticization which leads to inhomogeneity of the desired product.
  • the separate compression and plasticization with degassing of the foam waste and / or foam residues in addition to the chronological sequence of the addition of filler according to the present invention, is of particular importance, since only after the blowing agent residues and other cavities have been completely removed, due to the pore volume of the Foams, a homogeneous mixture of the foam wastes and / or foam residues in plasticized form with the filler is possible, which makes it possible to produce dimensionally stable molded articles with good dimensional stability. When using single-screw extruders, sufficient degassing is not economically feasible only with a very long screw.
  • the origin of the foam waste and / or foam residue is of minor importance in the sense of the present invention. So can the most diverse foam waste and / or foam residues originate, for example, from the packaging industry, furniture manufacture or the automotive industry. For simplified processing of the foam waste and / or foam residues, it is possible, but not absolutely necessary, to first roughly shred the foam residues. However, in order to use the foam residues and / or foam waste, it is necessary that they have a suitable size that enables them to be introduced into commercially available extruders.
  • Thermoplastic foam waste and / or foam residues made of polyethylene, polystyrene and / or polyurethane occur in particular in the industry. Accordingly, the most widely used foams are also used for the purposes of the present invention.
  • the filler to be used according to the invention preferably consists of finely chopped or finely ground residues which are as heat-stable as possible at the processing temperature.
  • the materials and material mixtures mentioned can preferably be used if they have a large surface area, so that a good bond with the thermoplastic matrix is obtained.
  • Wood flour is known to be very finely ground wood with a fiber length of less than 150 ⁇ m, which as a filter aid, as a filler, for. B. in the production of wood concrete and - if necessary after impregnation with suitable resins - in molding compounds and as an admixture to woodchip coatings is used.
  • This natural product usually contains a more or less large amount of water which, according to a further preferred embodiment of the present invention, can be removed by drying the wood flour at an elevated temperature.
  • a further preferred embodiment of the present invention consists in using wood flour or other fillers mentioned, which, before being mixed with the plasticized foam waste and / or foam residues, at a temperature of 100 ° C. to 650 ° C., in particular 150 ° C. to 250 ° C and preferably at 180 ° C was dried.
  • the weight ratio of foam waste and / or foam residues to filler can be chosen freely in a wide range. However, in order to achieve certain desired properties of the moldings, it is preferred to limit the weight ratio of foam waste and / or foam residue to filler. For the production of particularly dimensionally stable, homogeneous moldings, it has been found that a weight ratio of foam waste and / or foam residues to filler in the range from 10: 1 to 1: 1 from 5: 1 to 2: 1 is advantageous. If too much filler, based on the foam waste and / or foam residues, is used, the strength of the moldings decreases due to the lower binding capacity and the insufficient amount of thermoplastic.
  • the filler itself makes a large contribution to the strength of the shaped bodies, a reduced strength of the shaped body obtained can also be found when an insufficient amount of filler is used.
  • the filler in the moldings of the present invention has reinforcing properties, ie it does not act as an inactive filler. Accordingly, it is necessary to orient the respective amounts used to the desired properties of the shaped bodies.
  • thermoplastics from which foams are produced can be plasticized and / or melted at temperatures in the range of more than 100 ° C.
  • foam waste and / or foam residues at a temperature in the range plasticizing from 130 to 250 ° C, in particular in the range from 170 to 200 ° C.
  • a co-rotating twin-screw segment extruder is therefore preferably used, which provides a particularly homogeneous mass.
  • the temperature to be set and maintained in each case depends primarily on the main chemical component and the melting behavior of the foam material made of thermoplastic material.
  • thermoplastic foam waste and / or foam residues Although the primary object of the present invention is the recycling of thermoplastic foam waste and / or foam residues, it is possible in the sense of the present invention to use additives known per se, which are obtained as residues, for the production of moldings.
  • additives known per se such as thermoplastic residues and / or plastic waste, fillers, plasticizers, dyes, adhesion promoters, flame retardants and / or masterbatches, can be used in various stages of the process, in addition to the fillers mentioned above.
  • additives such as thermoplastic residues and / or plastic waste, fillers, plasticizers, dyes, adhesion promoters, flame retardants and / or masterbatches, can be used in various stages of the process, in addition to the fillers mentioned above.
  • the weight ratio of foam residues and / or foam waste to the additives mentioned above is also can be varied in a very large range.
  • the person skilled in the art knows amounts of flame retardants such as magnesium hydroxide or aluminum hydroxide to be used which are usually necessary in order to obtain moldings which correspond to certain fire protection regulations.
  • the principle effect of further fillers on the moldings is known per se, so that the person skilled in the field here is readily able to specifically set the desired properties of the moldings by the type and amount of the additives.
  • thermoplastic mixtures with thermosetting or solid fillers obtained in accordance with the process steps described above are shaped in a further process step to the desired dimensionally stable shaped bodies.
  • This shaping can preferably be carried out by injection molding or mold extrusion.
  • winding cores for winding plastic films can be produced which have an extremely high strength and heat resistance.
  • the surface quality can be varied to a large extent by the choice of the starting materials.
  • pallets for transporting goods that have similar properties to known ones can also be produced Pallets made of wood, which, however, have increased strength and reduced weight.
  • a further embodiment of the present invention thus consists of dimensionally stable molded articles which contain extruded, compressed, plasticized and degassed foam wastes and / or foam residues and filler which can be obtained using the process described above. Due to the hydrophobic embedding of the individual filler particles, the dimensionally stable molded bodies obtained according to the invention swell less than comparable articles made of wood. Wood flour mechanically reinforces the moldings. Added soft polyurethane (PUR) improves the elasticity and polyvinyl chloride (PVC) improves the surface quality. Additions of ABS increase the stability, PUR (hard), possibly as flour, have a strengthening effect. High-density polyethylene, PEHD, available for example under the Trocellen R mark, improves the connection between the individual components of the molded body.
  • PEHD available for example under the Trocellen R mark
  • the inlet temperature of the extruder was 170 to 180 ° C.
  • Wood powder was added to the compressed, plasticized thermoplastic in the extruder in an amount of 40% by weight. When the plasticized foam waste and / or foam residues were mixed with the wood flour, the temperature was reduced to 140 ° C, but increased to 200 ° C at the exit of the extruder.
  • the amount of wood flour was 40% by weight, based on the foam waste and / or foam residue. The compound obtained in this way was fed to the profile extrusion of bars, tubes and hollow chamber profiles.
  • Example 2 Analogously to Example 1, a polyurethane foam 0.2-0.3 kg / m 3 was used instead of polyethylene foam, which came from the polyol, isocyanate seat cushion production of motor vehicles. Before compression, analogously to Example 1, ABS plastic residues in an amount of 40% by weight and a particle size of approximately 8 mm in diameter and an amount of PVC plastic waste in an amount of 10% by weight were also added to the foam. and a particle size of 8 mm in diameter was added. The inlet temperature in the twin-screw extruder was 150 ° C. In the extruder, 20% by weight of wood flour was added to the above mixture of PUR, ABS and PVC. The temperature at the exit of the extruder was 190 ° C. The compound obtained in this way was used for injection molding a grip shell, cap, and lid.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

Selon un premier mode de réalisation, l'invention concerne un procédé de fabrication de corps moulés indéformables avec des déchets et/ou des restes de mousses thermoplastiques contenant le cas échéant des résidus d'agents moussants. Selon ce procédé, (a) on comprime les déchets et/ou les restes de mousses, (b) on plastifie et on dégaze les déchets et/ou restes de mousse sous l'effet de la chaleur, (c) on mélange dans une extrudeuse les déchets et/ou les restes de mousses plastifiés avec une charge sélectionnée parmi la farine de bois, les déchets de matières thermo-durcissables, les poudres métalliques, les fibres de verre et leurs mélanges, et (d) on moule par injection ou on extrude le corps voulu. Selon un autre mode de réalisation, l'invention concerne les corps moulés indéformables obtenus par le procédé ci-dessus.
PCT/EP1994/000629 1993-03-09 1994-03-03 Uilisation de dechets de mousses dans des corps moules Ceased WO1994020276A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU62578/94A AU6257894A (en) 1993-03-09 1994-03-03 Use of foamed-material waste for producing molded bodies

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934307323 DE4307323A1 (de) 1993-03-09 1993-03-09 Formkörper unter Verwendung von Schaumstoffen
DEP4307323.9 1993-03-09

Publications (1)

Publication Number Publication Date
WO1994020276A1 true WO1994020276A1 (fr) 1994-09-15

Family

ID=6482275

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/000629 Ceased WO1994020276A1 (fr) 1993-03-09 1994-03-03 Uilisation de dechets de mousses dans des corps moules

Country Status (3)

Country Link
AU (1) AU6257894A (fr)
DE (1) DE4307323A1 (fr)
WO (1) WO1994020276A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5672304A (en) * 1994-03-30 1997-09-30 Rieter Automatik Gmbh Method for manufacturing a foamable synthetic material from shredded foam
DE19816494A1 (de) * 1998-04-14 1999-10-21 M K F Uk Limited Newry Verfahren zur Herstellung von Wickelhülsen und Wickelhülse aus Kunststoff
DE10310510A1 (de) * 2003-03-09 2005-05-04 Fagerdala Deutschland Gmbh Wickelhülsen und Wickeldorne

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5847016A (en) * 1996-05-16 1998-12-08 Marley Mouldings Inc. Polymer and wood flour composite extrusion
US6344268B1 (en) 1998-04-03 2002-02-05 Certainteed Corporation Foamed polymer-fiber composite

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55140528A (en) * 1979-04-23 1980-11-04 Neeben Kk Preparing for synthetic resin compound containing paint remnant
GB2076728A (en) * 1980-05-21 1981-12-09 Midland Ross Corp Extrusion devices and methods of reclaiming scrap plastic material
DD201313A1 (de) * 1981-09-17 1983-07-13 Peter Franke Werkstoff fuer die herstellung von formteilen
DD231029A1 (de) * 1984-05-10 1985-12-18 Endler Fritz Dr Dr Ing Verfahren und einrichtung zum compoundieren von thermoplasten, insbesondere thermoplastabfaellen
EP0442102A1 (fr) * 1990-02-12 1991-08-21 General Electric Company Composition d'éther de polyphénylène-polystyrène recylé et procédé de préparation
WO1993022119A1 (fr) * 1992-04-30 1993-11-11 Erema Engineering Recycling Maschinen Und Anlagen Gesellschaft M.B.H. Procede et dispositif pour le recyclage de matiere plastique soufflee

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
JPS52119687A (en) * 1976-04-02 1977-10-07 Tomoo Kinoshita Apparatus for processing disposed foamed thermoplastic synthetic resin
DE2825414C2 (de) * 1978-06-09 1985-01-03 Moskovskij chimiko-technologičeskij institut imeni D.I. Mendeleeva, Moskau/Moskva Verfahren zur schnellen Extrusion hochviskoser duroplastischer oder thermoplastischer Materialien
DE3428119A1 (de) * 1984-07-31 1986-02-13 Elastogran GmbH, 2844 Lemförde Verfahren zur herstellung von bahnen aus holzmehlgefuelltem polypropylen
US5155146A (en) * 1991-03-29 1992-10-13 Reetz William R Thermoplastic composite and method and apparatus of making the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55140528A (en) * 1979-04-23 1980-11-04 Neeben Kk Preparing for synthetic resin compound containing paint remnant
GB2076728A (en) * 1980-05-21 1981-12-09 Midland Ross Corp Extrusion devices and methods of reclaiming scrap plastic material
DD201313A1 (de) * 1981-09-17 1983-07-13 Peter Franke Werkstoff fuer die herstellung von formteilen
DD231029A1 (de) * 1984-05-10 1985-12-18 Endler Fritz Dr Dr Ing Verfahren und einrichtung zum compoundieren von thermoplasten, insbesondere thermoplastabfaellen
EP0442102A1 (fr) * 1990-02-12 1991-08-21 General Electric Company Composition d'éther de polyphénylène-polystyrène recylé et procédé de préparation
WO1993022119A1 (fr) * 1992-04-30 1993-11-11 Erema Engineering Recycling Maschinen Und Anlagen Gesellschaft M.B.H. Procede et dispositif pour le recyclage de matiere plastique soufflee

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"EPS-RECYCLING", PLASTVERARBEITER, vol. 44, no. 2, February 1993 (1993-02-01), SPEYER, DE, pages 70 *
C. OTIS PORT: "PLASTISCOPE 2 . MACHINERY MAKERS, OTHER SUPPLIERS JOIN BATTLE TO SAVE ENERGY.", MODERN PLASTICS INTERNATIONAL, vol. 4, no. 5, May 1974 (1974-05-01), LAUSANNE CH, pages 94 - 98 *
DATABASE WPI Section Ch Week 7302, Derwent World Patents Index; Class ABC, AN 73-02516U C02! *
PATENT ABSTRACTS OF JAPAN vol. 5, no. 10 (M - 51)<682> 22 January 1981 (1981-01-22) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5672304A (en) * 1994-03-30 1997-09-30 Rieter Automatik Gmbh Method for manufacturing a foamable synthetic material from shredded foam
DE19816494A1 (de) * 1998-04-14 1999-10-21 M K F Uk Limited Newry Verfahren zur Herstellung von Wickelhülsen und Wickelhülse aus Kunststoff
DE19816494C2 (de) * 1998-04-14 2000-06-29 M K F Uk Limited Newry Verfahren zur Herstellung von Wickelhülsen und Wickelhülse aus Kunststoff
DE10310510A1 (de) * 2003-03-09 2005-05-04 Fagerdala Deutschland Gmbh Wickelhülsen und Wickeldorne

Also Published As

Publication number Publication date
DE4307323A1 (de) 1994-09-15
AU6257894A (en) 1994-09-26

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