Amodel PPA Used for New ABS Wheel Speed Sensor Sensitive Electronics Protected by Tough Material
Asset Caption: Hi-Stat Manufacturing uses Amodel (R) PPA from BP Amoco Polymers for this ABS wheel speed sensor to help protect sensitive electronics.
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ALPHARETTA, Ga.--May 29, 2001--A new antilock braking system (ABS) wheel speed sensor developed by Hi-Stat Manufacturing is using a grade of Amodel(R) polyphthalamide from BP Amoco Polymers to meet tough performance criteria.
The sensor is a cap assembly that mounts on the end of the wheel bearing and provides wheel speed data to the ABS computer.
Hi-Stat engineers chose Amodel A-1145 to replace the thermoplastic material they had used previously, based on several factors. "Amodel resin gave us the stability we needed and it provided a cost benefit over the other material," explains Mike Beane, product engineer with Hi-Stat. " It also turned out to be easier to mold than the other material."
Any material used for the wheel speed sensor must survive extensive testing. Part of the design verification process is a thermal cycling test, which requires the material to withstand six weeks of hourly temperature cycling between -40(degree)C to 120(degree)C. The material must also pass a so-called 10 psi test, wherein the part is installed in a fixture that simulates a wheel bearing for thermal cycling, and is subjected to 10 psi of air pressure applied to the part internally while the assembly is monitored for leakage. The components made from Amodel PPA passed all design verification tests with flying colors.
Amodel PPA is a unique semi-crystalline engineering polymer that bridges the cost-performance gap between traditional engineering thermoplastics--such as polycarbonate, polyamides, polyester and acetals--and higher-cost specialty polymers--such as liquid crystal polymers, polyphenylene sulfide and polyether imide. It has excellent mechanical properties--strength, stiffness, fatigue and creep resistance--over a broad temperature range.
About BP Amoco Polymers
BP Amoco Polymers, Inc. is a world leader in the development and manufacture of a wide range of high performance engineering polymers that are used throughout many industries. These materials can offer excellent cost-performance advantages over metals, ceramics, and many other engineering polymers. Headquartered in Alpharetta, Georgia, in the Atlanta metro area. BP Amoco Polymers serves customers worldwide through a network of sales and service offices.
For additional information, contact BP Amoco Polymers, Customer Service, 4500 McGinnis Ferry Road, Alpharetta, GA 30005. Phone: 800-621-4557 or 770-772-8200. E-mail: engpolymers@bp.com. Or visit our website at www.bpamocoengpolymers.com.
For editorial assistance, feature articles and photography, contact Marla Witbrod, BP Amoco Polymers. Phone: 770-772-8451. Fax: 770-772-8730. E-mail: witbromc@bp.com.
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