When Crown Research Institue, Scion, approached us to help develop a faster degrading bioplastic vine clip for the viticulture industry, we threw everything we could at the challenge.

Harnessing the expertise of our extrusion team, we optimised the clip to create a solution that's not just sustainable, but scalable too.


A growing problem

Every year the New Zealand wine industry uses an estimated 30 million plastic vine clips to hold nets over ripening bunches of grapes to prevent loss from birds and other pests.

The clips are used for 6 - 8 weeks until the nets are removed and the clips fall to the ground. This leaves a growing pile of plastic littering vineyards around the country and contributes to an emerging environmental problem: the accumulation of non-degrading litter of broken net clips in vineyards and the subsequent generation of microplastic pollution.

Trialling options

With the viticulture industry keen to stamp out the waste, Scion began developing a faster-degrading vine clip made of grape marc and bioplastic.

Led by researcher Steph Weal they trialled different prototypes at a local vineyard, testing numerous formulations before arriving at the right mechanical and physical properties.

The next challenge was ensuring the clip could go the distance to be produced at a commercial scale, and that's where our team's expertise really came in to play.

Scaling up

With the prototype clips showing real promise, our team was tasked to look for opportunities to improve the clip and ready it for production at scale.

Initial extrusion trials from our team lead to further formulation development, as we worked to optimise the raw material processing.

The improved formulations were then converted into clips via extrusion and secondary processing in our Christchurch plant.

The finished clips were then distributed for real-life testing, sent to vineyards across the country.

We've also now recognised out of industry applications - for example, there is potential to plastic bread clips in bread manufacturing.

Initial feedback has been very positive, with the project now set to deliver a solution to the market that has a much more sustainable and greener footprint.

The makeup of a solution

The innovative new clip is made using an early prototype of our unique sustainable polymers, PolyDegrade™.

What was a short-life, single-use product is now being revolutionised, with a sustainable product in its place - one that will have an appropriate, environmentally friendly end of life.

Find out more about PolyDegrade™ Vine Clips

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