LTMDLaboratory for Threat-Material Detection (Canada)
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While the LTMD includes all aspects of forest management, the new.
Causes of LTMD variations include extruder or die temperature oscillations due to a mistuned controller or improperly installed heaters or thermocouples; material formulation changes, including regrind or "fluff" ratios; screen-pack pressure buildup due to dirt accumulation; operator machine adjustments, particularly from shift to shift; inconsistent resin feed systems; and, especially with blown film, atmospheric changes due to ambient temperature, humidity, and barometric pressure.
In day-to-day usage by the machine operator, the gauging system can control most, if not all, profile (except streaks) and LTMD gauge variations.