Inorganic fillers are commonly used as anti-blocking agents in polymers to prevent the adhesion of polymer layers or surfaces during storage or processing. These fillers help improve handling, storage, and processing characteristics of polymer films, sheets, and molded parts. Here are some inorganic fillers commonly used as anti-blocking agents in polymers:
Silica (Silicon Dioxide)
Silica particles are widely used as anti-blocking agents in polymer films and coatings. They provide a micro-rough surface texture that reduces the contact area between polymer surfaces, preventing blocking without significantly affecting optical properties.
Talc
Talc is a naturally occurring mineral used as an anti-blocking agent in polymer films, particularly in polyolefins. Talc particles act as spacers between polymer layers, reducing surface adhesion and preventing blocking while maintaining film clarity and mechanical properties.
Calcium Carbonate
Micronized calcium carbonate particles are used as anti-blocking agents in polymer films and sheets. They provide a micro-rough surface texture that helps prevent polymer surfaces from adhering to each other, improving handling and processing characteristics.
Magnesium Silicate
Magnesium silicate, also known as talc or magnesium trisilicate, is used as an anti-blocking agent in polymer films and molded parts. It provides a lubricating effect that reduces surface adhesion and prevents blocking during storage and handling.
Aluminium Silicate
Aluminium silicate fillers, such as kaolin clay or bentonite clay, are used as anti-blocking agents in polymer films, sheets, and coatings. They impart a micro-rough surface texture that reduces surface contact and prevents blocking without affecting optical properties.
Barium Sulfate
Barium sulfate is used as an anti-blocking agent in polymer films, particularly in applications requiring high clarity and transparency. It provides a micro-rough surface texture that minimizes surface adhesion and prevents blocking while maintaining film aesthetics.
Glass Beads
Glass beads or microspheres are used as anti-blocking agents in polymer films and coatings. They provide a micro-rough surface texture that reduces surface contact and prevents blocking without significantly affecting film transparency or mechanical properties.