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consisted of a 64mm single screw extruder [24:1 L:D ratio], 100 mm die diameter, 0.75 mm die gap, and operated with 200°C die temperature. The extruder was run continuously and the extruder pressure, barrel power, and film was collected. Fig 1: (Below left) Extruder
pressure data was collected during PPA kinetic trial run. Prior to the run, the system was purged and neat b-LLDPE was run at the prescribed operating conditions until all parameters stabilized. (Right) Summary of the end-of-run pressure and power reductions achieved by using both PPA additives* was calculated from the extruder barrel power. By comparison to the neat LLDPE resin, we observed a 60% and 21% reduction in extruder pressure and power respectfully using Silquest PA-1 as a processing aid. Overall, Silquest PA-1 was found to have outperformed the fluoropolymer control in both categories.
Melt Fracture Elimination Study Silquest PA-1 clears melt fracture within 40 – 60 minutes which is an equivalent performance as per industry standard. A study carried
out comparing with PTFE as control on a single screw extruder with 64 mm screw diameter, 24:1 L/D ratio and 0.75mm die gap. A 0.5 MI metallocene LLDPE resin was used under 200°C die temp.
Heat Seal Evaluation The films were sealed using a standard heat seal apparatus. The seal strength was tested by mechanically pulling on both sides of the seal. The graph below reports force normalized by the seal gauge thickness. Apparently, there is no
difference in heat seal property between neat LLDPE, and with using 2 types of PPA. This indicates that Silquest PA-1 offers the same performance as PFAS benchmark.
Offerings
Momentive also partners closely with key customers to deliver customized solutions tailored to their specific processing needs. Leveraging the versatility of Silquest PA-1 chemistry, Momentive offers the flexibility to provide solid masterbatch formats upon request—ensuring optimal integration and performance based on individual manufacturing requirements.
* Please contact Momentive Product Stewardship at
commercial.services@
momentive.com for Food Product Regulatory Information Document.
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Blown Film process stability at various time intervals.
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