Meaning
Concentrated additive pellets containing slip agents dispersed in a carrier resin allow converters to control the surface friction of extruded films and molded parts. Utilizing a slip masterbatch enables precise dosing of active lubricating ingredients during primary resin processing. This method ensures uniform distribution of the additive throughout the polymer matrix.
Additive Dispersion
High concentration slip agents must be thoroughly compounded into the carrier resin to prevent agglomeration. In a typical slip masterbatch, the carrier polymer is selected to match or exceed the melt flow rate of the host polymer. This compatibility ensures rapid and uniform blending during the extrusion process.
Surface Friction
Migration of the slip agent to the part surface begins immediately after the molten polymer cools. Adding a slip masterbatch reduces the coefficient of friction from high tacky levels down to a manageable range. This surface modification is essential for high speed packaging lines.
Processing Benefit
Improved mold release and easier part ejection reduce cycle times and reject rates in injection molding. When using a slip masterbatch, film converters can prevent blocking in wound rolls and ensure smooth feeding through converting equipment. This additive system provides a cost effective method to modify surface properties without altering the bulk mechanical performance of the virgin polymer.
