Wells Plastics has developed a range of highly effective and novel biodegradable, oxo-biodegradable and degradable additive masterbatches and compounds.

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This rapidly developing marketplace requires strong partners who understand and steer emerging legislation and technologies in this field.

We are present on the British Standards steering group for degradation test protocols and are partners in a number of European and privately funded projects for the development of intrinsically biodegradable systems. We supply our products globally.

Wells product range includes biodegradable additive masterbatches, photo and thermally initiated systems through to combination and hybrid products.

Application Examples
Sheet, Film, Fibres, Injection Moulding and others.

Check-out Bag Applications of Reverte

Reverte Brochure (2.1 mb PDF file)

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Oxo-Biodegradable Additive Masterbatches

  • Impart oxo-biodegradable characteristics to polyethylene and polypropylene films and extrusions
  • High performance control system
  • Process under standard conditions
  • Maintain excellent physical and optical properties in blown and cast film


Wells Plastics’ new range of oxo-biodegradable additives and masterbatches, marketed under the ‘Reverte’ trademark, contain a metal ion pro-degradant to impart a photo-degradable and thermo-degradable property to polymers.

In addition to this they contain a unique secondary stage biodegradation promoter. The system utilises a carefully selected reaction rate modifier to control the timing and triggering of the oxo-biodegradation. These additives come in the form of small plastic pellets and are approved for food usage.


The high molecular weight of commercial grades of polymers render them too hydrophobic and, therefore, very resistant to direct microbial attack.

A reduction of the polymer chain length from its initial value of around 250,000 to a value between 4,000 and 10,000 increases its intrinsic microbial accessibility and enables subsequent biodigestion.

Reverte products initially catalyse the oxodegradation of the polymer chains and then promote the growth of microbial colonies to expedite the second biodegradation stage.

The initial chain scission (degradation) of the polymer chain causes a serial reduction in polymer molecular weight which ultimately results in acute embrittlement, microfragmentation and biodigestion. Oxodegradation causes the formation of a carbonyl group at the point of every scission.

Reverte is being used in all types of film and has found application in household rubbish and trash bags, food packaging, check out bags, bubble wrap, nappy sacks, magazine, and many others

Agricultural Films

The use of an agricultural mulch film can transform the growing process with higher yields and . However once the season is over the recovery of the film can be extremely problematic. The use of Reverte can improve this process by eliminating the need to remove the film at the end of the season.

The Reverte film can be formulated to breakdown in a pre-programmed manner under defined conditions. Once the film has micro-fragmented the small fragments can be ploughed into the ground without having to remove the film from the ground. Once the molecular weight of the fragments is low enough biodigestion of can occur in the soil.

Disposable Polypropylene Food Trays

Disposable food trays are used all over the world and there is concerns about their impact on the plant and how these products behave in the waste stream. In addition they can be often thoughtlessly discarded causing an unsightly littering problem. Treatment with foodsafe Reverte can greatly reduce this issue and ultimately aid the biodigestion of the plastic.

After the tray is discarded into the waste stream of if littered it will begin to embrittle and will rapidly fragment. In a greatly reduced period of time in comparison to untreated plastic the tray is no longer a littering hazard and the fragments will ultimately become available for biodigestion.

This information is correct to the best of our knowledge, but we would recommend that users make their own assessment to confirm that the material meets their requirements. We accept no liability for any damage, loss or injury resulting from the use of this information. Freedom from patent rights must not be assumed.

Wells Plastics Ltd

Emerald Way,
Stone Business Park, Stone,
Staffordshire, ST15 0SR, UK

Tel: +44 (0) 1785 817421
Fax: +44 (0) 1785 816357