MPM® 1114 is a pelletized masterbatch containing a high performance proprietary beta nucleant formulation in a polypropylene homopolymer resin. This masterbatch is specifically designed to be used with certain alpha-nucleated polypropylene polymers including homopolymers, random copolymers, and impact copolymers, in order to produce high levels of beta phase crystallinity in extruded sheets, films, and injection molded parts. If non-nucleated polypropylene resins are used, then the use of MPM® 1113 is recommended. When extruded sheets are stretched in the solid state to produce oriented films, these films will develop microvoids causing them to become white/opaque in appearance and undergo a reduction in density. In thermoforming applications beta nucleation broadens the processing window and produces final parts that have improved material distribution and higher strength and rigidity, thereby allowing the parts to be down-weighted. In injection and compression molding applications, the use of MPM® 1114 leads to improved impact strength.

Applications: MPM® 1114 is specifically designed to beta nucleate certain alpha-nucleated polypropylene resin when used at addition levels in the range of 1.0% to 2.0%. The major application areas for beta nucleated polypropylene include injection or compression molded polypropylene parts requiring higher impact strength, opaque and matte finish oriented film, and opaque thermoformed parts. Beta nucleated polypropylene is not suitable for applications requiring high clarity.

Advantages:

• Can be added at the extruder hopper to produce sheet with high levels of beta crystallinity.

• Can be used with certain alpha-nucleated PP resins, where other beta nucleant masterbatches would not be effective.

• Broadens the processing window for thermoforming PP, and produces thermoformed parts with more uniform material distribution and improved crush strength and rigidity, with lower sidewall density.

• All of the components of the masterbatch are FDA approved for food contact applications.

• This masterbatch can also be provided with various pigments, in order to color match the end use application (for example: caps & closures).