2026-01-28•5 min recycled compounds•VIESUNCO Materials Science Team

Eco Footwear Compounding: Adding 30%–50% PCR Recycled TPE Without Flex Fatigue Cracking

Meeting brand GRS recycled content quotas without sacrificing durability. How compatibilized PCR elastomers achieve 50,000 Ross-flex cycles without crack propagation.

#PCR Recycled#GRS Certified#Flex Fatigue#Eco Footwear#Recycling

Eco Footwear Compounding: Adding 30%–50% PCR Recycled TPE Without Flex Fatigue Cracking

1. Why Standard Regrind Fails in Outsoles

Multiple thermal heat cycles break polymer chains, resulting in brittle flex cracking:

▲ Colorful Athletic Outsole & Midsole Prototypes Tested in Lab

Chain-Extension Technology: Re-couples cleaved polymer chains during compounding.
Ross Flex Fatigue (ASTM D1052): Exceeds 50,000 cycles at room temp with zero cracking.

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