Technology Spotlight

How to Improve IV Loss in Recycled PET: Chain Extender Solutions for rPET Processing Recycled PET (rPET) is widely used in pelletizing, fiber, sheet, strap, injection molding and other polyester processing applications. But during collection, washing, drying and repeated melt processing, PET molecular chains can be shortened by hydrolysis, thermal degradation and shear. The result is a lower intrinsic viscosity (IV), weaker melt strength and a narrower processing window. For many recyclers and c...

How Chain Extenders Improve PLA Melt Strength and Processing Stability PLA is widely used in films, sheets, foams, fibers, nonwovens, injection molding, thermoforming and 3D printing. However, many PLA processors face the same challenge: when molecular weight is not high enough, or when PLA is exposed to moisture and heat during processing, the melt can become weak, unstable and difficult to control. For applications that require stable extrusion, foaming, film formation or dimensional consisten...

  As PET continues to expand across packaging, engineering plastics, films and consumer goods, large quantities of scrap, trimming waste, regrind and off-spec materials are generated during processing. Recycling these materials is no longer just a cost topic—it is a core strategy for sustainability and carbon reduction.   However, recycled or reprocessed PET faces several key challenges: • Chain scission after multiple heat histories → reduced IV and melt strength; &bu...

  Under global sustainability requirements, manufacturers face a key challenge: How to reduce carbon emissions while maintaining engineering-grade material performance? BAITONG provides a complete rPET-based modification solution that delivers both sustainability and high performance.   1. Challenges of Recycled PET (rPET) • High thermal sensitivity and IV loss due to multiple heat histories; • Reduced melt strength and poorer fiber/filler dispersion; • Large variations...

  Polyethylene terephthalate (PET) has long been the star material in packaging – from preforms and bottles to films and fibers. But when the target shifts to high-end engineering applications such as automotive parts, electrical connectors and appliance housings, conventional PET quickly reaches its limits:   • Instability in glass-fiber-reinforced systems, with fluctuating viscosity and mechanical properties; • Insufficient heat resistance, with HDT failing to meet h...

  Traditional physical recycling of PET faces unstable performance, downgraded use, IV loss, yellowing and insufficient heat resistance. rPET Physical Recycling: Turning Low-Value Waste into High-Value Material (BAITONG) BAITONG provides a molecular-engineering-based approach combining chain extension, anti-hydrolysis and functional add-on packages.   1. Key Challenges • Unstable IV and melt viscosity due to chain scission; • Unable to meet high-end applications such as bott...