Specialty Minerals Inc. (SMI) antiblock products are talc based and available in surface-treated and non-surface-treated forms. SMI talc antiblocks are designed for high antiblocking efficiency with retention of film mechanical properties. Surface-treated talc improves dispersion and compatibility with polyolefins, while also lowering additive interaction. 

Talc/mineral blend antiblocks (Optibloc^® and Clear-Bloc^® talc antiblock series) are for film applications requiring high clarity, low haze, and lowest additive interaction. ABT^® 2501 is a non-surface-treated talc antiblock recommended for applications where odor issues are a concern in a specific end-use application. Microbloc^® talc antiblock is designed for unique applications and non-olefin resin systems where enhanced adhesion between polymer and talc is important. 

Antiblock selection always involves tradeoffs between antiblocking efficiency, film strength retention, optical performance, film thickness, and application cost considerations. Use this product selector chart to make your choice of specialty minerals antiblock product, or contact us with the details of your specific application for a customized recommendation.

Click here to download an introduction to antiblocks and SMI talc-based antiblocks in LLDPE films.

Learn more:

• SMI products for plastics
• Specialty Minerals antiblock talcs for polyolefin films
  
  
• Specialty Minerals antiblocks
• What is an antiblock?
• Formulating High Performance LLDPE Blown Films With Optibloc^® High Clarity Antiblocks – Introduction to antiblocks – a downloadable Specialty Minerals publication.
• Specialty Minerals Publications on talc-based antiblocks: Downloadable papers by Specialty Minerals on talc-based antiblocks and their applications.
  
  
• Replacing diatomaceous earth with SMI talc-based antiblocks
  
• Diatomaceous earth replacement study
• Replacing synthetic silica with Specialty Minerals talc-based antiblocks
• Synthetic silica replacement study: blown film
  
  
• Economical SMI talc antiblocks
• SMI antiblocks for low-polymer process aid interaction
• SMI antiblocks for low-odor applications
• Reduced slip agent interaction with surface-treated talc antiblocks
  
  
• Blown Film Basics
• Cast Film Basics
• Specialty Minerals Antiblock Technical Service Support
  
  
• What is Talc? A mineral introductory page
  
  
• Download technical data sheets for SMI products
  
• Request a sample
  
  
• About Specialty Minerals Inc.
• Specialty Minerals Plant Locations and Profiles
• Quality and ISO at Specialty Minerals