Skip to content

Antioxidant Masterbatches

Reduce the effects of thermal degradation with our custom formulated additives for polymer applications.

Increasing the service life of polymers.

Polymeric materials are susceptible to oxidative degradation by the action of heat. Thermal degradation can occur during melt processing of the polymer, or during the service life of the finished component. This degradation can result in a reduction in aesthetics, physical and mechanical properties or even discolouration of the part.

Antioxidant additives interfere with the oxidative cycle, thereby inhibiting the oxidative degradation process. Antioxidants can be used effectively to:

  • Improve the processing of polymers.
  • Increase the service life of polymeric components.
  • Give better control when incorporating recycled materials where the feed stock will has been through multiple heat cycles.


How it works.

Antioxidants are traditionally split into two types; primary and secondary.

Primary antioxidants are designed to give protection to the finished product, whereas secondary antioxidants are used to stabilise the polymer during processing.

Antioxidant masterbatches can be supplied in pure primary or secondary form, or as blends.

Antioxidants are used widely in many polymer conversion processes. Examples include:

  • Gel and black speck reduction in blown and cast film extrusion.
  • Process stabilisation in fibre extrusion.
  • Improving the service life of profile extruded, and injection moulded products, e.g. pipes and fittings.
  • Prevention of discolouration during service and sterilisation processes.

Wells antioxidant masterbatches can be custom formulated to suit specific applications or polymer types.

Applications: Blown film, Cast Film, BOPP, Sheet Extrusion, Profile Extrusion, Blow Moulding, Injection Moulding, Nonwovens and Fibre

Polymer Carriers Available: PE, PP, PS, TPU

Talk to us about antioxidant masterbatches.

We can provide custom antioxidant masterbatch systems to meet your specific needs


Antimicrobial Masterbatches and powders for polymer applications


Biodegradable Additive Masterbatches for polymer films


Here you can access our policies, regulatory documents and certificates

Wells Plastics Founded

The business was founded in 1984 by Danny Wells servicing the UK with specialist additive masterbatches for the UK film and fibre marketplace, with a particular expertise in UV masterbatches.

New Management

In 1997 Danny left the business, under new management the product range began to grow.

Bactiglas™ Launches

In 1999 the business entered antimicrobial masterbatch marketplace which would become the Bactiglas™ range of products.

Reverte™ Arrives

In 2003 Wells developed a range of oxo-biodegradable masterbatches which would become the Reverte™ range of products in 2005.


In 2006 the business began its first site expansion taking on more warehousing and office space on the same industrial estate, including an expansion of the lab facility to support the growing business.

Growing Team

In 2009 the

Technical Department expanded further

Management Buy Out

In 2011 KCP supported a management buy-out and provided investment for growth

International Growth

In 2012 Wells increased dramatically its international foot print through an expanded distribution network.

Founding Members

In 2015 Wells are the founding Member of the oxo-biodegradable plastics federation (now known as the Society of Biodegradable Polymers)

Capacity Increases

In 2018 the business underwent a significant capacity uplift with a 40% expansion and extension of the current production facility

ISO 14001

In 2019 the business achieved ISO 14001


Ecovadis Silver

In 2020 Wells achieve a Silver EcoVadis rating

A Busy Year

In 2022 Wells created the Innovation Centre, a raw material warehouse, gained a Gold Ecovadis rating and completed a Management Buy Out

This website uses cookies to ensure you get the best experience on our website.

Our products

A wide range of masterbatches for film and sheet applications

Marketed under the Bactiglas™ trademark masterbatches and powders food packing through to medical devices.

A wide range of masterbatches for film, sheet and injection moulding applications

Wells offer a bespoke additive masterbatch and compounding service

Exothermic and endothermic masterbatches and powders for extrusion and injection moulding processes.

A range of biopolymer and biobased materials for extrusion and injection moulding applications.

Wells additive masterbatch and compound contract manufacturing services

Moisture absorbing masterbatches for all extrusion and injection moulding processes

A wide range of bespoke flame retardant masterbatch and compound solutions.

Masterbatches to enhance point of sale items with fragrances or eliminate unwanted mal-odours from recycled feedstocks

A range of masterbatches sold under the Reverte™ trademark for providing a biodegradable property to polyolefins

Masterbatches to improve the quality and aesthetics of extruded polymer, reducing waste and energy consumption.

A range of compounds to aid in the purging, cleaning and shut down procedures of extrusion equipment.

Masterbatches and compounds which provide an enhanced and controlled slip property to extruded and injection moulded articles.

Masterbatches to enhance stability polymers during processing, in use and during recycling suitable for a wide range of applications and processes

Masterbatches to enhance the UV stability of polymers during suitable for a wide range of applications and processes