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Frequently Asked Questions About PFAS-Free & Silicone-Free PPA for Polyolefin Extrusion | SILIMER 9700

1. How do I choose a PFAS-free PPA when my formulation also requires silicone-free additives?

Not all PFAS-free polymer processing aids are silicone-free. Some use silicone-based technology, which may not meet specific formulation restrictions.

For applications requiring both PFAS-free and silicone-free chemistry, SILIMER 9700 provides an alternative active processing aid for evaluation in compatible polyolefin formulations. Selection should consider the customer's chemical specifications, resin compatibility, and required extrusion performance.

2. Why do sharkskin and die build-up sometimes persist after switching to a PFAS-free PPA?

Sharkskin and die build-up can result from several factors, including polymer rheology, excessive shear stress, die design, processing temperature, resin degradation, and additive compatibility.

If these problems persist after replacing a fluorinated PPA, the formulation and extrusion conditions should be reviewed together. SILIMER 9700 can be evaluated as part of a controlled processing optimization trial to determine whether it helps reduce these defects.

3. How should I compare SILIMER 9700 with my existing fluorinated PPA during production trials?

A comparative trial should use consistent resin formulations, extrusion equipment, and operating conditions, while allowing for proper purging and process stabilization.

Key evaluation parameters include melt fracture clearance, die build-up over time, extrusion pressure, processing torque, continuous operating stability, and final product quality.

These measurements help determine whether SILIMER 9700 can meet the processing requirements of a specific production line rather than relying solely on initial extrusion appearance.

4. Can SILIMER 9700 improve extrusion processing without compromising printing, bonding, or heat-sealing performance?

SILIMER 9700 is designed to improve extrusion processability while maintaining the resin's physical properties and supporting downstream performance, including printing, bonding, and heat sealing.

For applications where these properties are critical, comparative testing of print adhesion, bonding strength, heat-seal performance, and relevant physical properties is recommended to confirm compatibility with the final formulation.

5. Should I choose SILIMER 9700 active processing aid or SILIMER 9701 PPA masterbatch?

The choice depends on the formulation requirements and additive incorporation process.

SILIMER 9700, supplied in active additive form, offers flexibility for polymer compounders and masterbatch manufacturers developing customized formulations.

SILIMER 9701, supplied in masterbatch form, provides a carrier-based processing aid option for compatible extrusion processes.

Selection should consider carrier resin compatibility, feeding and dispersion requirements, additive concentration, and processing conditions.

6. What information should I provide to evaluate SILIMER 9700 for my extrusion process?

To assess the suitability of SILIMER 9700, it is helpful to provide the following application details:

• Polymer type and resin grade, including melt flow properties

• Formulation components, including fillers and other additives

• Extrusion process, equipment, and operating conditions

• Current processing aid and addition level, if applicable

• Main processing challenges, such as sharkskin, die build-up, or excessive torque

• Target improvements and critical downstream performance requirements

Based on these details, SILIKE's technical team can help discuss suitable evaluation conditions, technical documentation, and sample testing options.