The Processing and Drying Temperature of Plastics –
|Polymer name||Processing Temp.||Drying Temp.||Hours||BD|
|ABS Med I||440-510°F||190°F||4||42|
|Acetal||380-420°F||Homo 200 Co 210°F||1.5||40|
|Acrylic Gen Purpose||420-485°F||180°F||1.5||42|
|Acrylic High Heat||420-485°F||180°F||2.5||42|
|Acrylic High Impact||420-485°F||180°F||2.5||42|
|PET – Bottle||520-560°F||340°F||5||52|
|PBT 30% G||460-490°F|
2.5-3 (only if required)
Engaging Read – Melting Point of Plastics | The Ultimate Guide
The Importance of Processing and Drying –
Processing material, as we all know, should be done perfectly to produce quality products. Inaccurate processing can lead to the production of faulty and deficient products and can also sometimes cause damage to the mold and also the molding machine.
The importance of drying temperature is also an essential part of the process, as too much moisture can cause several processing problems. Most polymers exhibit some level of polarity and absorb some amount of moisture from the air. The level of impact moisture will have dependent on the polymer and its applications.
Before preparation of resin for injection or production in injection molding, the material should be properly dried according to the manufacturer’s recommendations. Not doing that, a manufacturer is risking the quality of the part. Common issues are brittleness, bubbles, sink marks, irregular moldings, and lower mechanical properties.
Adequate drying can also significantly lower the risk of hydrolysis and part failure. Hydrolysis is a chemical reaction in polymers that ruptures the covalent bonds in its chain, reducing its mechanical properties.
However, using a drying system and not always do the job to improve the quality and consistency of the injection molding process. Being on the shop floor, consistent monitoring of the dew point and moisture content of resins is necessary to make sure they’re meeting manufacturers’ recommendations for dryness.
Interesting Read – Mold Temperature in Plastics | A Complete Analysis
Final Thoughts –
That’s all I wanted to say about the processing and drying temperature of plastics. The data published in the article is well researched and comes from reliable sources. However, the data is shared just for information purposes. Consulting your material supplier about the processing and drying temperature of the material you want to work with is the best way to go.
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Have a wonderful day:)