DE4403173A1 - Process for stripping metallized, plate-shaped information carriers - Google Patents

Process for stripping metallized, plate-shaped information carriers

Info

Publication number
DE4403173A1
DE4403173A1 DE19944403173 DE4403173A DE4403173A1 DE 4403173 A1 DE4403173 A1 DE 4403173A1 DE 19944403173 DE19944403173 DE 19944403173 DE 4403173 A DE4403173 A DE 4403173A DE 4403173 A1 DE4403173 A1 DE 4403173A1
Authority
DE
Germany
Prior art keywords
information carriers
stripping
metallized
plate
shaped information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE19944403173
Other languages
German (de)
Inventor
Detlef Ermacora
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.)
WARNER MUSIC Manufacturing EUROPA GmbH
Original Assignee
WARNER MUSIC Manufacturing EUROPA GmbH
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 WARNER MUSIC Manufacturing EUROPA GmbH filed Critical WARNER MUSIC Manufacturing EUROPA GmbH
Priority to DE19944403173 priority Critical patent/DE4403173A1/en
Priority to PCT/EP1995/000368 priority patent/WO1995021045A1/en
Priority to AU15773/95A priority patent/AU1577395A/en
Publication of DE4403173A1 publication Critical patent/DE4403173A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086—Descaling; Removing coating films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • 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
    • B29K2033/00—Use of polymers of unsaturated acids or derivatives thereof as moulding material
    • B29K2033/04—Polymers of esters
    • B29K2033/12—Polymers of methacrylic acid esters, e.g. PMMA, i.e. polymethylmethacrylate
    • 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
    • B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding 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
    • B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
    • 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
    • B29L2009/00—Layered products
    • B29L2009/005—Layered products coated
    • 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
    • B29L2017/00—Carriers for sound or information
    • B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
    • B29L2017/003—Records or discs
    • B29L2017/005—CD''s, DVD''s
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Abstract

A process is disclosed for removing the coating of metallised, disk-shaped information carriers, such as CD's. The surface of the CD is bombarded with a granulated material, i.e. a pressure setting plastic. The granulate is preferably made of the same plastic as the CD.

Description

Die Erfindung betrifft ein Verfahren zum Entschichten metallisierter, plattenförmiger Informationsträger, wie CDs, wobei die Oberfläche der CD mit einem körnigen Material bestrahlt wird.The invention relates to a method for stripping metallized, plate-shaped information carriers, such as CDs, the surface of the CD is irradiated with a granular material.

Plattenförmige Informationsträger im Sinne der Erfindung sind beispielsweise Audio- und Video-CDs, Laserdisks, Minidisks, CDIs und CD-ROM. Zur Vereinfachung werden all diese Informationsträger nachfolgend unter dem Begriff CD zusammengefaßt.Are plate-shaped information carriers in the sense of the invention for example audio and video CDs, laser disks, mini disks, CDIs and CD-ROM. To simplify all of these information carriers summarized below under the term CD.

Es ist bereits bekannt, zur Wiederaufbereitung von Ausschußwerkstücken CDs mit einem Hochdruckwasserstrahl zu beaufschlagen, dem abrasives Material, beispielsweise Sand oder Glaskugeln beigefügt ist. Auch das Entschichten mittels eines trockenen Sandstrahls wurde bereits vorgeschlagen (DE-A-35 11 711).It is already known to reprocess Reject CD workpieces with a high pressure water jet act on the abrasive material, such as sand or Glass balls are attached. Also decoating using a dry Sandblasting has already been proposed (DE-A-35 11 711).

Die entschichteten CDs werden üblicherweise zu einem Granulat vermahlen und zu anderen Produkten verspritzt bzw. vergossen. Für den Fall, daß sie der Herstellung von Informationsträgern wieder zugeführt werden sollen, müssen sie mit einem gewissem Anteil frischen Granulats vermischt werden, um die geforderten Produkteigenschaften sicherzustellen. In jedem Fall müssen die entschichteten CDs gründlich gereinigt werden, um alle Spuren des abrasiven Materials zu entfernen. Verbleibende Rückstände würden, insbesondere bei der Wiederverwendung des Granulats zur Herstellung neuer CDs, die Ausschußrate drastisch erhöhen.The stripped CDs usually become granules ground and sprayed or cast into other products. For the In the event that they are returned to the production of information carriers they have to be made with a certain amount of fresh granules to be mixed to the required product properties ensure. In any case, the stripped CDs must be thoroughly cleaned to remove all traces of the abrasive material. Residues would remain, especially at Reuse the granules to make new CDs that Increase scrap rate dramatically.

Der Erfindung liegt die Aufgabe zugrunde, den Nachreinigungsaufwand bei der Entschichtung zu senken und damit auch die Ausschußrate bei der Wiederverwendung des Granulats für die Herstellung von Informationsträgern zu reduzieren.The invention is based, the post-cleaning effort in the stripping process and thus also the reject rate the reuse of the granulate for the production of Reduce information carriers.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das körnige Material ein Granulat aus einem duroplastischen Kunststoff ist, wobei das Granulat vorzugsweise aus dem gleichen Kunststoff besteht, wie CD. Gemäß einer vorteilhaften Weiterbildung der Erfindung wird das Granulat direkt aus den Ausschußwerkstücken gewonnen.According to the invention this object is achieved in that the granular Material is a granulate made of a thermosetting plastic, wherein the granules preferably consist of the same plastic as  CD. According to an advantageous development of the invention Granules obtained directly from the rejects.

Das erfindungsgemäße Verfahren hat den Vorteil, daß etwaige Rückstände des zum Entschichten benutzten Granulats auf den Informationsträgern weniger problematisch sind, als artfremde Rückstände, wie zum Beispiel Rückstände auf Quarzbasis. Der Aufwand, der bei der Nachreinigung betrieben werden muß, kann daher gegenüber bekannten Verfahren deutlich reduziert werden.The process according to the invention has the advantage that any Residues of the granulate used for decoating on the Information carriers are less problematic than strangers Residues, such as quartz-based residues. Of the Effort that must be carried out during the post-cleaning can therefore compared to known methods can be significantly reduced.

Wird das Granulat aus den Ausschußwerkstücken der Produktion gewonnen, also beispielsweise aus Polymetylmetacrylat (PPMA) oder Polycarbonate (PC) ist damit ein erheblicher Preisvorteil verbunden.The granulate is made from the rejects of production won, for example from polymethyl methacrylate (PPMA) or Polycarbonate (PC) is associated with a considerable price advantage.

Das Granulat wird üblicherweise einem Hochdruckwasserstrahl beigemischt. Korngröße und Strahlgeschwindigkeit entsprechen den üblichen, dem Fachmann bekannten, Werten. Es ist auch möglich, das Granulat ähnlich wie beim Sandstrahlen, trocken zu verwenden.The granulate is usually a high pressure water jet added. Grain size and jet speed correspond to that usual values known to the person skilled in the art. It is also possible that Granules similar to sandblasting to use dry.

Claims (4)

1. Verfahren zum Entschichten metallisierter, plattenförmiger Informationsträger, wie CDs wobei die Oberfläche der CD mit einem körnigen Material bestrahlt wird, dadurch gekennzeichnet, daß das körnige Material ein Granulat aus einem duroplastischen Kunststoff ist.1. A method for stripping metallized, plate-shaped information carriers, such as CDs, the surface of the CD being irradiated with a granular material, characterized in that the granular material is a granulate made of a thermosetting plastic. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Granulat aus dem gleichen Kunststoff besteht wie die CD.2. The method according to claim 1, characterized in that the Granules are made of the same plastic as the CD. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß das Granulat aus dem Ausschuß bei der Herstellung der CDs gewonnen wird.3. The method according to claim 2, characterized in that the Granules obtained from the committee in the manufacture of the CDs becomes. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das Granulat aus PMMA oder PC besteht.4. The method according to claim 3, characterized in that the Granules made of PMMA or PC.
DE19944403173 1994-02-02 1994-02-02 Process for stripping metallized, plate-shaped information carriers Withdrawn DE4403173A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE19944403173 DE4403173A1 (en) 1994-02-02 1994-02-02 Process for stripping metallized, plate-shaped information carriers
PCT/EP1995/000368 WO1995021045A1 (en) 1994-02-02 1995-02-01 Process for removing the coating of metallised disk-shaped information carriers
AU15773/95A AU1577395A (en) 1994-02-02 1995-02-01 Process for removing the coating of metallised disk-shaped information carriers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19944403173 DE4403173A1 (en) 1994-02-02 1994-02-02 Process for stripping metallized, plate-shaped information carriers

Publications (1)

Publication Number Publication Date
DE4403173A1 true DE4403173A1 (en) 1995-08-03

Family

ID=6509296

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19944403173 Withdrawn DE4403173A1 (en) 1994-02-02 1994-02-02 Process for stripping metallized, plate-shaped information carriers

Country Status (3)

Country Link
AU (1) AU1577395A (en)
DE (1) DE4403173A1 (en)
WO (1) WO1995021045A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0842739A2 (en) * 1996-10-04 1998-05-20 Philips Patentverwaltung GmbH Method and device for mechanically removing a foreign matter coating from a base material
DE19703104A1 (en) * 1997-01-29 1998-07-30 Walter Schlutius Recycling of the polycarbonate content of compact discs
WO1998039107A1 (en) * 1997-03-06 1998-09-11 Maveg Gmbh Method and device for removing a coating which is bonded to the plastic body of a digital storage disc
DE10000566A1 (en) * 2000-01-08 2001-07-26 Messer Griesheim Gmbh Recycling of surface coated plastic components, e.g. lacquered car parts, involves loosening bond of coating followed by its removal by cryogenic treatment

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3245099A1 (en) * 1982-12-07 1984-06-07 Hohn, Andreas Blasting agent for removing flash on plastic parts
IL71367A0 (en) * 1983-04-07 1984-06-29 Vault Corp Method and apparatus for controlled removal of oxide from floppy disks
DE3511711C2 (en) * 1985-03-29 1993-12-09 Polygram Gmbh Reprocessing high-quality plastics from waste and scrap workpieces
JPS63221975A (en) * 1987-03-09 1988-09-14 Sekisui Plastics Co Ltd Synthetic resin grains for polishing
DE8803364U1 (en) * 1988-03-12 1988-05-05 Bloch, Klaus, 5205 St Augustin, De
GB9020204D0 (en) * 1990-09-15 1990-10-24 Pain B R K Surface treatment
JPH05269744A (en) * 1992-03-27 1993-10-19 Sintokogio Ltd Method for releasing coating from coated plastic product
JP3153882B2 (en) * 1992-09-14 2001-04-09 住友ダウ株式会社 Method for removing decorative part from decorated resin-made flat molded product and method for recycling decorative resin flat molded product

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0842739A2 (en) * 1996-10-04 1998-05-20 Philips Patentverwaltung GmbH Method and device for mechanically removing a foreign matter coating from a base material
EP0842739A3 (en) * 1996-10-04 1998-12-16 Philips Patentverwaltung GmbH Method and device for mechanically removing a foreign matter coating from a base material
US6095903A (en) * 1996-10-04 2000-08-01 U.S. Philips Corporation Method and device for the mechanical removal of a layer of alien material from a basic material
DE19703104A1 (en) * 1997-01-29 1998-07-30 Walter Schlutius Recycling of the polycarbonate content of compact discs
WO1998039107A1 (en) * 1997-03-06 1998-09-11 Maveg Gmbh Method and device for removing a coating which is bonded to the plastic body of a digital storage disc
DE10000566A1 (en) * 2000-01-08 2001-07-26 Messer Griesheim Gmbh Recycling of surface coated plastic components, e.g. lacquered car parts, involves loosening bond of coating followed by its removal by cryogenic treatment

Also Published As

Publication number Publication date
WO1995021045A1 (en) 1995-08-10
AU1577395A (en) 1995-08-21

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