A Spanish producer’s trials with celery and herbs showed a significant shelf-life extension using Sirane’s innovative packaging film Sira-Flex™ Resolve®.
Celery only truly started to turn after a mammoth 44 days, and a similar figure was achieved with spinach, coriander and parsley when held in cold storage.
For celery this was an increase of more than five days on alternative forms of packaging and 10 days beyond what would be expected without packaging, and for the herbs an increase of more than five days on what was achieved with alternative packaging.
Discolouration and odour in particular was slowed down by the use of the bags.
Jeremy Haydn-Davies, sales director, said: “This is further testament to the unique properties of Sira-Flex™ Resolve®, and results like this keep coming in.
“We know Sira-Flex™ Resolve® has some remarkable properties, and we’ve had people running trials around the world, many of whom are now starting to share their results.”
Sirane’s Sira-Flex™ Resolve® is a unique film which has been developed to have the optimum balance between humidity control and O2 and CO2 permeability.
The permeability is temperature dependant so that the perfect atmosphere is maintained inside the pack even if the storage temperature is variable.
Simon Balderson, Sirane’s managing director, said: “The results are remarkable. There is no condensation on the inside of the film and the product does not dry out.
“The package atmosphere is maintained with the optimum balance of atmospheric gases to prevent degradation. In simple terms, the food lasts longer.
“Shelf life extension of several days and more is achieved for many products. The film is suitable for all types of vegetables including salads as well as many types of fresh fruit.”
The film is a natural bio-polymer made from plants. It is sustainable and fully compostable. The permeability is controlled by the property of the film itself.
Due to the unique structure of the film material, the permeability to humidity, O2 and CO2 is different in each case. This has allowed Sirane’s team of scientists to balance the permeability of each component to achieve the optimum result.
Earlier trials have shown very positive results with many other types of fresh produce.
Last year trials with UK distributors revealed double the shelf-life on brassicas.
In the trials cauliflower and broccoli - which following transportation had been deteriorating after just one day on the shelves - was still in good condition after five days.
The same trials showed an additional two days shelf-life for cabbages, leeks and carrots.
Other very positive findings have been reported in strawberries, mushrooms, green beans, salads and potatoes. Jeremy added: “We try to avoid making claims that Sira-Flex™ Resolve® will achieve a particular level of shelf-life, as there are so many factors.
“What we suggest is that customers try the film in their own food chain, in their own set of conditions, and see what results can be achieved by using Sira-Flex™ Resolve®.”