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How to Stop Plastic from Turning Yellow or Degrading During Processing?

Antioxidant Solutions for Thermal & Oxidative Stability

Quick Answer: Siya Polymer's antioxidant additives protect the polymer from thermal and oxidative degradation during extrusion, injection moulding and recycling, preventing yellowing, odour, and loss of mechanical properties.

Why This Happens

Every time a polymer is melted — during extrusion, injection moulding, or repeated recycling — it is exposed to heat, shear and oxygen, all of which cause thermo-oxidative degradation. This shows up as yellowing or discolouration, a burnt or plasticky odour, loss of molecular weight, brittleness, and a drop in mechanical properties like impact and tensile strength. It's especially common in high-shear processing, multiple recycling passes, and light-coloured or natural (uncoloured) products where any yellowing is instantly visible. Left unmanaged, this problem quietly eats into your product's quality and shelf life. Siya Polymer & Speciality Chemicals helps processors protect the polymer from the inside with the right antioxidant package.

Antioxidant Solutions for Thermal & Oxidative Stability — Key Questions Answered

Why does plastic turn yellow during extrusion or moulding?

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

How to prevent thermal degradation during multiple recycling passes?

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

How to remove burnt smell or odour from processed plastic?

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

How to protect natural/light-coloured products from discolouration?

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

How to maintain mechanical properties over the product's shelf life?

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

Siya Polymer's Solution

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service. This prevents yellowing, odour formation and loss of mechanical properties, and is especially valuable for recycled streams and light-coloured or transparent products.

See Antioxidant Additives →

Every application is different — call Siya Polymer & Speciality Chemicals and describe your exact problem, and our technical team will recommend the right grade and dosage.

📞 Call +91 70404 14615 💬 WhatsApp Us

Frequently Asked Questions

Siya Polymer's antioxidant additives protect the polymer from thermal and oxidative degradation during extrusion, injection moulding and recycling, preventing yellowing, odour, and loss of mechanical properties.

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

Siya Polymer's antioxidant additives (primary and secondary antioxidant combinations) protect the polymer against thermal and oxidative degradation during processing and in service.

ISO 9001:2015 Certified Company - Siya Polymer & Speciality Chemicals Quality Certification

ISO 9001:2015 Certified Company

Siya Polymer & Speciality Chemicals follows internationally recognized quality management standards, ensuring consistent quality, reliability and trust for every polymer additive, PP compound and specialty chemical we supply across Maharashtra and India.

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📱 +91 70404 14615 (Harshal Mali)
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