Article: The Importance of "Moisture Content" and "Viscosity" in Plastic Molding
By quantifying the moisture content in the pellets and the viscosity of the molten material, we can reduce molding defects. A comparative article is currently available on our website! A must-read for the molding industry!
= The Close Relationship Between Moisture and Viscosity = If thermoplastic polyurethane (TPU) pellets are not sufficiently dried, it can directly lead to molding defects. Therefore, to quantitatively evaluate the impact of the drying degree of TPU pellets on their moldability, we measured the moisture content and viscosity of both undried and dried TPU pellets and compared the appearance of the extrudate (strand). The details are published on our company website. Please click the link below to take a look.
basic information
If pellets are molded without sufficient drying, changes in material flow within the mold due to decreased viscosity and the foaming of moisture can result in shape irregularities and bubbles in the molded product. I.T.S. Japan supports continuous stable molding from both the perspective of reliable drying and a system that can quantify and evaluate it.
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ITS Japan Corporation
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For more details, please feel free to contact us. ◎ ITS Japan Co., Ltd. TEL: 047-449-2961
Detailed information
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A lineup ranging from compact dehumidifying dryers that can be directly mounted on molding machines to large stationary high-capacity types. High-efficiency dehumidifying dryers that operate solely on compressed air without using adsorbents. The CARD series utilizes compressed air to achieve stable drying. The energy required for drying comes only from the heater. Additionally, it features a low-cost design that does not use consumables like adsorbents. Various ideas incorporated into its simple structure have achieved the best performance. We offer capacities from 1 liter to a maximum of 3500 liters, and it can be used as long as a 200V power supply and compressed air are available. The compact type dryer can be directly mounted on small molding machines, thereby improving material supply efficiency. Even the large stationary type does not use adsorbents, allowing for reduced running costs. ◎ Maintenance costs are close to zero, enabling a reduction in material drying costs! ◎ Can be directly mounted on molding machines. ◎ Incorporates various ideas to prevent bridging.
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High-tech polymers such as PET, PC, and PA6 have their moisture content in pellets significantly affecting the molding of products. The moisture content in pellets is minimal, so methods for precise measurement have been limited; however, the AquaTrack V (Five) achieves high precision equivalent to the Karl Fischer method with its unique measurement approach. Furthermore, it does not require large equipment like nitrogen, making moisture measurement on-site possible with just a 100V power supply. Handling and disposal of reagents are also easy. The moisture meter "AquaTrack V (Five)," specialized for measuring the moisture content of polymers, is widely used in the plastic molding industry.
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Achieving highly reproducible measurements of corrected accurate shear viscosity. Furthermore, it enables easy measurement of elongational viscosity, allowing for a better understanding of the material's essence. The Imatek R6000, with its flexible control software and robust frame to prevent measurement errors, significantly provides the precise information necessary for molding, offering new benchmarks for material design.
