Pyralux® LF


Pyralux® LF Copper Clad Laminate, Coverlay, Bondply & Sheet Adhesive

DuPont™ Pyralux® LF products are acrylic-based copper clad laminates, coverlays, bondplys and sheet adhesives and have been the industry standard in high reliability applications for over 35 years with a proven record of consistency and dependability.


  • High bond strength
  • High thermal resistance
  • Halogen-free
  • Low outgassing, NASA data available
  • No refrigeration required for storage
  • Able to withstand multiple lamination cycles without degradation

Pyralux® LF Copper-Clad Laminate

Pyralux® LF acrylic based laminates are made with DuPont™ Kapton® polyimide film and are available in sheet form as single or double sided clads in a wide variety of thicknesses. Pyralux® laminated composites are typically used to produce high reliability, high density circuitry of flexible, rigid-flex, and all-flexible multilayer constructions.

Construction and Certification for Laminate:

  • Polyimide thickness: 12, 25, 50, 75 and 125um
  • Copper thickness: 17, 35 and 70um
  • Copper type: available with RA, DT(RA) and ED coppers
  • Custom sizing available up to 49 inches in length
  • Certified to IPC 4204A/1

Pyralux® LF Coverlay and Pyralux® LF Bondply

DuPont™ Pyralux® LF coverlay (bondply) composites are constructed of DuPont™ Kapton® polyimide film, coated on one side (both sides) with a proprietary B-staged acrylic adhesive. They are used to encapsulate etched details in flexible and rigid-flex multilayer constructions.

Construction and Certification for Coverlay and

  • Polyimide thickness: 12, 25, 50, 75 and 125um
  • Adhesive thickness: 12, 25, 50 and 75um
  • Certified to IPC 4203A/1


DuPont™ Pyralux® LF Sheet Adhesive

DuPont™ Pyralux® LF sheet adhesive is a proprietary B-staged modified acrylic adhesive coated on release paper. Sheet adhesive is used primarily to bond flexible innerlayers or rigid cap layers in multilayer lamination. It is also widely used to bond flexible circuits to rigid boards during the fabrication of rigid-flex circuits, as well as to bond stiffeners and heat sinks.

Construction and Certification for Sheet Adhesive:

  • Adhesive thickness: 12, 25, 50, 75 and 100um
  • Certified to IPC 4203A/18

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