Pressure-indicating film

FujiFilm Prescale is a thin Mylar-based pressure-indicating film from Sensor Products Inc. that is hand-placed between contacting surfaces to map and measure the amount of interfacial stress being exerted on honeycomb cores, composite layups and bonded surfaces within composite structures.

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FujiFilm Prescale is a thin Mylar-based pressure-indicating film from Sensor Products Inc. (Madison, N.J.) that is hand-placed between contacting surfaces to map and measure the amount of interfacial stress exerted on honeycomb cores, composite layups and bonded surfaces within composite structures. It can be used to determine how surface stresses are distributed, and it helps operators avoid inconsistencies and misregistration in composite parts. When placed between contacting surfaces, this sensor film instantaneously and permanently changes color in direct proportion to the actual pressure applied. Precise pressure magnitude is then easily determined by comparing color variation results to a color correlation chart. The sensor film can detect contact pressures from 7 to 43,000 psi (0.5 to 3,000 kg/cm2) and can be used to determine press planarity in lamination processes, monitor vacuum bagging pressures, confirm pressure uniformity on filament wound parts and calibrate tools and equipment. It also can be placed between contacting rollers in the resin metering stage and then removed and visually inspected to serve as a guide to correct roller alignment. For minute inspection, additional graphical and statistical data can be retrieved from the film through Topaq, an optical analysis system.

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