Plastic granules are prone to moisture absorption. The amount of this moisture directly depends on the surrounding microclimate that accompanies the transportation and storage of the plastic. Using granules with excessively high moisture content can lead to a decline in the quality of injection molded plastic products.
Insufficient drying of plastic before molding can cause many negative effects on the final product. Typical consequences of excessive plastic moisture are streaks and bubbles on the surface of the product, as well as general dimensional inaccuracies of the item.
The stricter the quality requirements for the final product, the more critical the issue of proper drying of granulated plastic becomes. One of the key indicators of the drying process is maintaining certain dew point temperature values. The ideal dew point temperature for drying plastic is between -30 and -60 °Ctd. If the value rises above -15°Ctd, it will be impossible to achieve the necessary dryness levels.
In our catalog, you can find high-precision dew point temperature sensors of German manufacture. The optimal solution for controlling the moisture of plastic granulate is a stationary sensor FA 510, specially designed for industrial dryers. If mobility is required, a very convenient solution for operational control of the dryer’s dew point temperature is the portable sensor DP 510.
The devices FA 510 and DP 510 are universal dew point temperature measurement devices for all types of dryers, capable of measuring down to -80°Ctd.
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