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News
July 28, 1997 02:00 AM

UNITS SHOW MEASURING PRODUCTS

PLASTICS NEWS REPORT
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    CHICAGO — Dynisco Inc.'s Kayeness Polymer Test Systems and Measurement and Control subsidiaries introduced new products at NPE 1997 in Chicago.

    Kayeness Polymer Test Systems showed its new RheoTruder real-time viscosity measurer.

    ``We married the technology of a lab rheometer with the on-line capability of a resin transfer system,'' said Donald DeLaney, the unit's vice president of technology.

    For now, the upscale rheometer focuses on measuring polyolefin viscosity.

    In late 1995, a large chemical company asked Dynisco for a system to test highly filled materials. A system was developed, beta-tested in late 1996 and has been sold to the chemical firm.

    The system integrates a three-quarter-inch single-screw extruder and a laboratory rheometer. The unit can be located away from production with a pellet or powder transfer system moving the process material.

    A real-time rheometer measurement can generate a full flow curve in less than eight minutes. Tests can be performed continuously, providing flow curves with greater precision than those from a traditional lab rheometer.

    The RheoTruder starts at $85,000.

    ``It is twice as precise as a laboratory measurement,'' DeLaney said.

    Dynisco's Measurement and Control subsidiary introduced its IPX series of intelligent pressure transmitters.

    One Dynisco customer uses this transmitter for special applications on a proprietary line that is targeted to measure the pressure of molten polymers for the chemical processing industry, the company said.

    The IPX series can maintain a 0.15 percent pressure measurement over process temperatures of 77-752° F, and can self-correct for process temperature effects.

    Conventional smart process transmitters operate at process temperatures of less than 572° F and lose accuracy as temperatures increase, the firm said.

    The series has a new thin-film element and proprietary processing method to produce an ultrastable pressure measurement. The transmitter needs no calibration, leading to increased yields, reduced scrap and less labor expense.

    The new transmitter costs about $2,000 and is made in Sharon, Mass.

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