Water Activity and Plastics (AN-13467-00)

• Products:
  • AquaLab Dew Point Water Activity Meter 4TE,
  • AquaLab Series 4TEV,
  • AquaLab Series 3

One of the advantages of plastics is their freedom from attack by ambient moisture conditions. However, in the resin state prior to processing, plastics can absorb moisture. Failure to remove this absorbed moisture from the plastic resin can result in surface defects in the final product such as splay, sliver streaking, internal bubbles, and craters. Improper drying can also cause physical property such as loss of impact strength, loss of tensile strength, elongation or poorer melt flow. Surface absorbed moisture can usually be removed with hot air or hopper drying while moisture absorbed internally must be removed using dehumidifying drying.

Download now to read the full article.

File Downloads

• WaterActivityandPlastics.pdf Water Activity and Plastics. Download now.