Heating Elements Help Extend the Strawberry Season Using Cartridge Heaters

The process of blown film extrusion, where plastic material, often sourced from recycled sources, is heated to a molten state (using band and cartridge heaters), forced through a circular die and expanded with hot air into a ‘bubble-like’ formation, is applied in the fabrication of a wide variety of films for packaging markets and, yet, it’s usefulness does not end there. The agricultural industry has for some time been reaping the benefits of this manufacturing method, in the form of a range of films such as greenhouse and silage films, but perhaps most noticeably to rural dwellers, in the form of crop forcing film.

The majority of strawberry farmers grow their crops under the protection of polythene tunnels. The tunnels not only protect the crop from unfavourable weather conditions, such as prolonged periods of rain, but also helps combat the spread of disease and enables the growing season to be extended – resulting in less reliance on imports to satisfy consumer needs.

Plastic film made for agricultural purposes is most often manufactured using recycled plastics – all agricultural plastics are recycled in line with strict legislation that controls all waste on farms in England and Wales. Plastics recycled from farms is taken to recycling plants where it is processed and recycled into plastic pellets, ready for use again in the manufacture of more farm films and other plastic products.

Hence, manufacturing film such as crop forcing film for agriculture, is a truly sustainable process. Both the recycling and blown film extrusion technologies are supported by quality band and cartridge heater elements.