SILIKE Launches PFAS-Free “SILIMER” PPA Series for PE Film Extrusion, Eliminating Melt Fracture and Sharkskin Without Fluoropolymers

Silike China

Overview

SILIKE has launched PFAS-free Polymer Processing Aids (PPAs), the “SILIMER” series, to replace fluoropolymer-based solutions in PE film extrusion. These non-fluorinated additives reduce melt fracture and sharkskin by creating a dynamic and reversible slip layer at the die interface, stabilizing melt flow under high shear. This innovation aims to meet increasing PFAS regulatory pressure while delivering comparable performance in melt fracture elimination and optical stability for various film types.

In Depth

Key Findings

SILIKE has introduced its innovative “SILIMER” series of PFAS-free Polymer Processing Aids (PPAs) specifically designed for polyethylene (PE) film extrusion. This new product line serves as a direct replacement for existing fluoropolymer-based solutions, effectively eliminating critical quality issues such as melt fracture and sharkskin that are common in extrusion processes.

Technical / Clinical Details

The “SILIMER” series utilizes a unique non-fluorinated chemical structure that forms a dynamic and reversible slip layer at the die interface during extrusion. This slip layer uniformizes the shear rate of the molten polymer, stabilizing the melt flow under high shear conditions. This stable flow significantly suppresses melt fracture (surface irregularities of the molten resin) and sharkskin (a textured, shark-skin-like surface roughness), leading to a substantial improvement in film surface smoothness and optical transparency. The technology is compatible with various types of PE films, including LPE, LLDPE, and HDPE, contributing to enhanced extrusion productivity and consistent product quality across diverse applications.

Background & Context

PFAS compounds have been extensively used as polymer processing aids due to their exceptional low-friction properties. However, their environmental persistence and potential health impacts have led to them being labeled “forever chemicals,” subject to increasingly stringent global regulations. Specifically, the use of PFAS in food contact materials is restricted in many countries, compelling industries to urgently transition to PFAS-free alternatives. SILIKE’s “SILIMER” series directly addresses this critical market need for compliant and high-performing solutions.

Strategic Significance & Outlook

The introduction of SILIKE’s PFAS-free PPA “SILIMER” series offers PE film manufacturers a crucial solution that ensures both regulatory compliance and maintained high performance. This enables manufacturers to produce competitive products while significantly reducing their environmental footprint. Looking ahead, the potential application of this technology to other polymer extrusion processes beyond PE films could accelerate the broader transition towards PFAS-free and sustainable practices across the plastics industry. As environmental regulations continue to tighten globally, such innovative materials will play an indispensable role in ensuring the sustainable growth and competitiveness of the sector.

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