Designing with PMC CFRT^® Composite Materials

Transitional / Contour Areas – Minimum radius should be a minimum of 6 mm.

Holes and Hole Placement – Holes are not recommended for CFRT^® applications as they disrupt the continuous fiber of the component. Holes may be incorporated into a design keeping in mind large holes, mulitiple holes and holes close to the edge will weaken the composite and can cause catastrophic failure. Holes need to be addressed on a case by case basis.

Flex Area – Materials placed in the flex zone will limit motion. Fiber placement and content will dictate the amount of motion limitation. For example, material running beyond the forefoot flex zone and around the forefoot will increase rigidity and limit flex.

Arch Area – Use of arch wrap will add stiffness to the component and subsequently, the footwear. Arch wrap angle, height, and radius will determine the amount of stiffness added to the footwear. Extreme wrap, height or radius may cause foot discomfort.

Carbon Fiber – Carbon fiber represents a noticeable increase in stiffness and weight reduction from fiberglass. It is also thinner than fiberglass.

Carbon Direction – Materials are offered in all carbon, hybrid – carbon/glass and all glass. In the hybrid material, the carbon direction will have more stiffness. Carbon should be used in the direction in which stiffness / resiliency is desired.

Exposed Areas – CFRT^® materials should be protected from objects which can cause abrasion, puncture, or fracture.

Designs should be reviewed through PMC Development for composite soundness and optimaization. Our composite engineers are available to assist you in your application.

Do not hesitate to contact us at 805-482-1722