Thursday, December 7, 2023

Kinder, gentler Kiwi clip off to protect Aussie vines

Avatar photo
Made from biodegradable polymers and waste materials sourced from wood processing, the vine clips are designed to replace traditional plastic clips.
Reading Time: 3 minutes

A successful research partnership with Scion is bearing fruit for a Christchurch company set to export biodegradable vine clips for the first time.

PolyNatural has begun taking commercial orders for its eco-friendly vine clips from South Australia and from vineyards across New Zealand, as winegrowers look for more sustainable practices. 

Made from biodegradable polymers and waste materials sourced from wood processing, the vine clips are designed to replace traditional plastic clips that are used to hold nets over ripening grapes to keep birds and other pests away. About 30 million plastic clips are used by the NZ wine industry every year.

The export milestone was reached after extensive product development and trials on vineyards in NZ and comes five years after the first prototype clip was created by Scion scientists in collaboration with PolyNatural’s parent company, EPL.

PolyNatural general manager for sales and marketing Gareth Innes said the commercialisation process has been a journey of discovery.

“Good things take time and we’ve spent several years collaborating with Scion by testing formulations, using different materials and doing a lot of field research to develop a product that we’re confident winegrowers are very satisfied with.

“Scion’s research support and the feedback we received during trials has helped us to create a world-class product that is helping the global wine industry combat a major environmental issue.”

Vine clips and netting are essential to wine-growing operations for pest management and to prevent fruit loss. But after six to eight weeks, nets are removed and clips fall to the ground, leaving a growing pile of non-degrading plastic that litters vineyards and, over time, contributes to microplastic pollution.

With the viticulture industry keen to adopt more sustainable practices, Scion began developing a faster-degrading vine clip made of grape marc and bioplastic. 

In a study led by researchers Dawn Smith and Stephanie Weal, Scion trialled different prototypes in the field, testing numerous formulations before arriving at the right mechanical and physical properties.

In 2020, EPL took up the challenge of improving the clip even further and getting it ready for production at scale. 

“The technology and materials that we’re using now are different to what they were five years ago, but we couldn’t have achieved what we have if it wasn’t for the work that Scion did in those early trial stages,” Innes said.

“There’s huge market demand for our prototype as we estimate the industry uses about 100 million plastic ties every year to hold their vines down.”

In 2020 EPL & Scion were recognised at the Sustainable Business Awards by winning the award for Outstanding Collaboration for the work on the predecessor to the PolyNatural vine clip.

Lessons learnt during the commercialisation process and further market research have sparked additional biodegradable products for the horticulture, viticulture and marine industries.

To support demand for riparian planting and land re-vegetation projects, PolyNatural began trialling biodegradable plant protectors in 2021 to improve the survival rates of young plants by protecting them from pests and the elements. The product range was launched commercially earlier this year.

PolyNatural is also working on eco-friendly ties for the kiwifruit industry.

New Zealand’s fishing and aquaculture industries are also set to benefit from PolyNatural’s technology and business growth. It is part of a collaboration that is working to solve the problem of plastic waste at sea caused by abandoned or lost fishing gear. 

Early testing is underway of a new biobased material that could be used in a range of durable products designed to fully biodegrade in marine and freshwater environments.

Scion business development manager Jeremy Warnes said the PolyNatural and Scion partnership has been a success story.

“While not exclusive, our trusted relationship with them actually dates as far back as 2007 when we started throwing a few ideas around with EPL and exploring ways we can work together to have a positive impact on the environment,” Warnes said.

“Our scientists provided biopolymer expertise and research that has helped to kickstart these commercial products. But EPL and now their business unit PolyNatural must be given enormous credit for developing the technology further and for getting the vine clips market ready.”

A number of NZ winemakers have successfully trialled the clips, including Cloudy Bay Vineyards in Central Otago and Marlborough. Central Otago vineyard manager Derek Beirnes describes them as the “perfect product”.

As well as targeting the Adelaide wine-growing region, PolyNatural is planning to export its vine clips to Canada and France, with support from NZ Trade & Enterprise.

Innes said winegrowers around the world are hungry for sustainable products.

“Everyone knows that they can’t recycle their way out of the environmental plastic problem. We’re very proud of the mahi tahi (collaboration) that has gone into these products, which are providing solutions for New Zealand, in New Zealand, with benefits to the world.

“These products are the future for industry.”

People are also reading