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Silicones from Dow Corning
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Die Drool

Prevent Die Build-up

Die build-up, also known as plate-out, is a challenge in any extrusion process. It can cause imperfections in the extruded material and costly downtime while your equipment is cleaned. Slowing your processing time or raising temperatures, while effective in some cases, can carry significant drawbacks.

Dow Corning's advanced silicone-based additives prevent die build-up in two important ways, without requiring changes in your processing parameters:

  1. Our silicone additives migrate to the interface of the material and the extruder screw and act as a lubricant that reduces friction and avoids accumulation of material.
  2. Our silicone additives improve compatibility between resins and fillers to reduce mechanical degradation-and resulting friction of a compound during extrusion.

Compared to PTFE, Dow Corning silicone-based additives deliver higher performance at significantly lower loadings of 2% to 8%, further contributing to their cost-effectiveness.

Solving Your Processing Challenges

Dow Corning silicone-based additives reduce die build-up to avoid costly equipment downtime and improve the quality of your end product. Other benefits include:

  • Higher productivity
  • Faster throughput
  • Retention of mechanical properties (impact resistance, tensile strength)
  • Reduced screw torque
  • Lower extruder amperage

Product highlights include:

  • Dow Corning® MB50 Masterbatches: Pelletized formulations containing 50% of an ultra-high molecular weight siloxane polymer dispersed in a thermoplastic resin.
  • Dow Corning® 4-7081 Resin Modifier: Halogen-free powdered siloxane for processing highly filled thermoplastic formulations. Its acryl function facilitates anchorage to non-polar resin matrices, such as PP or PE.
  • Dow Corning® 4-7105 Resin Modifier: Halogen-free siloxane powder that enhances processing of highly filled formulations. This grade is suitable for polar resin matrices such as PA, PC and PET, as it is fully neutral.

Find out how Dow Corning can help you boost the throughput and quality of extruded compounds with silicone processing aid additives. It's as easy as contacting your Dow Corning representative.

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