Rogers’ DeWAL low-density film range uses stretched PTFE, also described as expanded PTFE or ePTFE, for wire and cable applications. The manufacturer’s product family information highlights its use as a dielectric in coaxial cable.
Identify the exact film grade
The low-density film category should be distinguished from other DeWAL products, including unsintered film, skived PTFE, membranes and UHMW polyethylene films. Each category has its own construction and intended uses. A broad film-family name is insufficient for ordering or qualifying a material.
Specify the required grade, thickness, width and density, together with the cable construction and intended processing method. Use the corresponding manufacturer data sheet for electrical and mechanical properties rather than substituting values for low-density polyethylene packaging film.
Review the finished application
Confirm the relevant dielectric performance and dimensional requirements with the supplier. Qualification should address the actual cable design and manufacturing conditions. Do not assume a generic material overview establishes food-contact suitability, medical use or building-barrier performance.
Use Rogers’ product resources for current film information and availability. For an RF circuit board used alongside the cable, explore the PCB materials directory and define its laminate requirements separately.
Official sources: Rogers DeWAL low-density film information; Rogers DeWAL product families.
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