Desiccant masterbatch when added to polymers during melt processing chemically react and bind with moisture irreversibly and becoming part of the product and are stable upto processing temperatures of the polymers.
This moisture removal helps to reduce surface defects caused due to presence of moisture such as lensing and fisheyes in films, bubble breakage, voids, pin holes, silver streaks in moulded articles. Presence of moisture not only affects surface appearance but also mechanical properties of final products such as tensile strength, elongation, impact strength and compressive strength due to porosity induced by moisture in final articles.
Moisture in polymer processes can be introduced from multiple sources such as fillers, pigments and additives, recycled polymer streams of PE, PP which are washed and sorted, wet polymers or some materials stored in high humid areas. Adding Desiccant masterbatch can save energy cost and time by eliminating or reducing the pre-heating step and time.
