A manufacturer was having issues processing thermoplastic urethane (TPU) including non-fills, pin push deformation, and parts sticking in the mold. ExCista's solution of adding 1% of their Silaplast ES7712 pelletized siloxane additive improved the material flow and reduced the coefficient of friction, eliminating the non-fills and pin push deformation. It also allowed for easier mold release and a 30% reduction in total cycle time.

1. ExCista Innovative Solutions
Silaplast™ improves fill pattern,
de-molding and cycle time
Thermoplastic Urethane (TPU) process enhancement case
study
Product Profile:
Industry: Confidential
Application: Rotating pendulum noise isolating bumper
Material: Thermoplastic Urethane (TPU)
Customer Issue:
The fabricator was having the following problems with the processing of
a TPU material:
Non-fills / short shots
Pin-push deformation
Parts sticking in the mold
ExCista Solution: Silaplast™ ES7712
This pelletized siloxane additive acts as an internal lubricant during
processing, improving flow and slip properties for better mold fill and
throughput. Metered into the polymer mix automatically at just 1% by
weight, the additive also reduces the coefficient of friction (COF) on the
surface of the molded part, resulting in easier mold release
Results:
Non-fills / short shots -- eliminated
Pin-push deformation – not visible
Parts eject without sticking
30% reduction in total cycle time
ExCista Corporation, Confidential Page 1 of 3

2. ExCista Innovative Solutions
Silaplast™ improves fill pattern,
de-molding and cycle time
Thermoplastic Urethane (TPU) process enhancement case
study
Non-fills / short shots
Good parts
ExCista Corporation, Confidential Page 2 of 3

3. ExCista Innovative Solutions
Silaplast™ improves fill pattern,
de-molding and cycle time
Thermoplastic Urethane (TPU) process enhancement case
study
Pin push defect
Good parts
ExCista Corporation, Confidential Page 3 of 3