Recycling of Molding Resin Residues Generated from the Printed Wiring Boards Production Process

• Iji Masatoshi

  Ecology-Based Systems Research Laboratory, Resource and Environmental Protection Laboratories, Nec Corporation

• Yokoyama Sadahiko

  Ecology-Based Systems Research Laboratory, Resource and Environmental Protection Laboratories, Nec Corporation

Bibliographic Information

Other Title

• プリント配線基板の製造工程で発生する成形残の再資源化

Abstract

A recycling technology has been developed for the molding resin residues, which are generated from printed wiring boards (PWBs) production process and consist of cured epoxy resin, glassfiber, and copper circuits. The residues of PWBs were pulverized by crushing and grinding, and the resulting powders were separated into a copper-rich powder and a powder consisting of glassfiber and resin (glassfiber-resin powder) by gravimetric and electrostatic method. More than 90% (maximum 96%) of copper was recoverable as the copper-rich powder from the residue powder of PWBs. This had an average particle size of 100-300μm. The recovered glassfiber-resin powder was found to be useful as a filler to improve the strength properties and the thermal expansion property of epoxy resin products, such as paints and additives.

Journal

• Journal of the Japan Society of Waste Management Experts

  Journal of the Japan Society of Waste Management Experts 7 (2), 88-96, 1996

  Japan Society of Material Cycles and Waste Management

Keywords

• printed wiring boards
• molding resin residue
• recycling
• pulverizing
• separation

Details

• CRID: 1390282680273609472
• NII Article ID: 10002472334
• NII Book ID: AN10414685
• DOI: 10.3985/jswme.7.88
• ISSN: 1883163X
• ISSN: 18831648
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed