Frequently Asked Questions About Pyralux® Flexible Circuit Materials

  1. Are there other Pyralux® flexible laminate constructions available, other than what is listed on specific product data sheets?
  2. What is the standard copper type used in Pyralux® flexible laminates?
  3. What is the grain orientation of the copper for Pyralux® sheet clads?
  4. What are the IPC specifications for Pyralux® flexible laminates products?
  5. What are the recommended storage conditions for Pyralux® flexible laminates?
  6. What are the recommended laminating conditions for Pyrlaux® flexible laminates?
  7. What are the recommended safe handling conditions for Pyralux® flexible laminates?

 

  1. Are there other Pyralux® flexible laminate constructions available, other than what is listed on specific product data sheets?
    Yes. The constructions listed on our product data sheets are standard products that are available at any time. Please contact your sales representative, or technical service at 919-248-5280 to inquire about other available constructions.
  2. What is the standard copper type used in Pyralux® flexible laminates?
    Rolled annealed foil is the standard type of copper used in Pyralux® constructions. Electro-deposited and double treat are also available.
  3. What is the grain orientation of the copper for Pyralux® sheet clads?
    Pyralux® LF, FR, AP and AX copper clad laminates are provided primarily in 24" x 36" sheets. The grain direction of the copper runs parallel to the 36" direction, which is the same as the machine direction of the film.
  4. What are the IPC specifications for Pyralux® flexible laminates products?
    The IPC Specifications for Pyralux® laminates vary by product and construction:
  5. What are the recommended storage conditions for Pyralux® flexible laminates?
    Pyralux® flexible composites will retain their original properties for a minimum of one year when stored in the original packaging at temperatures of 4-29°C (40-85°F) and below 70% humidity. The products do not need refrigeration and should not be frozen. Keep the material clean and well protected. Copper-clad laminates should not be automatically discarded if storage conditions have deviated from these limits. We recommend that material which has been stored outside of these conditions be examined in a practical test before being committed to production.
  6. What are the recommended laminating conditions for Pyrlaux® flexible laminates?
    Laminating conditions for Pyralux® flexible composites are typically in the following ranges:
    Part Temperature: 182-199°C (360-390°F)
    Pressure: 14-28 kg/cm2 (200-400 psi)
    Time: 1-2 hours, at temperature 
  7. What are the recommended safe handling conditions for Pyralux® flexible laminates?
    Pyralux® copper-clad laminated composites are supplied in sheets and are fully cured (C-staged). DuPont is not aware of anyone developing contact dermatitis, or suffering any other medical discomforts, when using Pyralux® products. The uncured acrylic monomers in the bond ply adhesive may impart a mild odor. However, these products have been extensively tested under operating conditions (drilling and lamination conditions) and found to liberate measurable volatiles only well below accepted safe limits (e.g., PEL).

To eliminate contact between the skin and exposed adhesive after etching, wear lint-free gloves or fingerpads. Anyone handling Pyralux® should wash their hands with soap before eating, smoking, or using restroom facilities. Gloves and fingerpads should be changed daily, and wash other protective clothing frequently.

Adequate ventilation and exhaust is recommended in press rooms to prevent the buildup of potentially harmful vapors, to remove disagreeable odors, and to dissipate heat. Drill rooms should be furnished with standard equipment recommended by drill vendors and required by OSHA standards.