CompositesWorld

OCT 2018

CompositesWorld

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35 CompositesWorld.com Braided fabrics for thermoset and thermoplastic resin systems A&P Technology (Cincinnati, OH, US) is exhibiting engineered braided fabrics designed to enable cost savings. Bimax, a ±45° off-the-roll fabric, is said to eliminate the need to cut 0°/90° woven fabric on the bias, saving time and money. QISO, a 0°/±60° fabric, is balanced in a single ply enabling easy lay-up and eliminating the need to orient plies. Benchmarked against comparable woven fabric laminates, QISO reportedly outperforms in tension, compression, open hole and impact events. In addition to standard fabrics, A&P's range of braiding machinery allows for design flexibility and the customization of hybrid fabrics to optimize part requirements, reduce waste and reduce manufacture costs. Custom fabrics include those with hybrid architectures (e.g., triaxial regions within a biaxial fabric), hybridized material systems and customized widths. A&P's braided fabrics are processed by all major prepreg suppliers and are available in thermoplastic form as well. A&P braids narrow-slit thermoplastic tapes into preforms or wide fabrics, and A&P also provides wide fabrics for the production of thermoplastic billets or thermoplastic semipreg – fabrics that are post-treated and coated with thermoplastic resin film. Engineered braided fabrics are also combined with bulk molding compound (BMC) or sheet molding compound (SMC) to provide structural reinforcement in high-load areas. The use of braid with SMC, says A&P, enables quick cycle production of highly structural parts. Liquid compression molding (LCM), another quick-cycle fabrication method, also takes advantage of the tailorability of braid. A&P provides multiaxial fabrics for LCM that offer superior performance and are designed to drape. Booth U3. CAMX 2018 DeWAL's pressure-sensitive PTFE tapes and films are known for tightly sealing carbon-fiber composites and cleanly releasing parts from molds. Use them to separate epoxy resins from laminates or to seal vacuum bags up to 500°F. DeWAL PTFE tapes and films offer minimal elongation and temperature-resistant silicone-based adhesion. UL-recognized 204-HD films are both skived and tensilized for higher tensile strength, lower elongation and higher dielectric strength. 204-HD films range from 0.5 to 21.5 inches wide and are as long as 108 feet, with tensile strength up to 13,000 psi at 500°F. They are in stock in 2, 3 and 5 mil thicknesses, as are other 36" width DeWAL tapes and films for composites. Whether you are doing open or closed molding, whether your process is lay-up, compression molding, resin transfer or continuous lamination, DeWAL will share a solution with you. DeWAL PTFE Tapes & Films — for tighter vacuum seals and cleaner mold separation. Used as an alternative to sanding and painting Used as peel-ply on molds Used between a mold and a carbon-fiber composite DW 134 DW 204-HD DW 202 & DW 2000 15 Ray Trainor Drive Narragansett, RI 02882 usa1@rogerscorporation.com 800-366-8356 International: 001-401-789-9736 dewal.com

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