Recycling woven bags
Production waste is a valuable secondary resource: Recycling and internal re-use contribute to economic prosperity and continuity through cost savings on raw material and resource conservation.
PP and PE resin, the input materials for bag production, are too valuable to be wasted – no matter what the market price is.
Starlinger has put a lot of effort in increasing the efficiency of the bag production equipment to reduce production waste. Although zero waste is the goal, it is not entirely possible. And production waste is not only a loss of primary resin, but also a cost factor when it comes to material handling, storage, selling or disposal.
Through appropriate material handling and recycling the minimised though unavoidable production waste is converted into a valuable secondary resource.
Converting waste into a valuable resource
Production waste is generated during various process steps: extruder start-up, winding, weaving, conversion, printing, to name just a few. It can be contaminated during the production step – e.g. printing, or during handling – e.g. by humidity or dust. Thus, material handling plays a key role because the quality of the input material for recycling is crucial for high quality regranulate.
Knowing the bag production process as no other, Starlinger can provide valuable know-how on optimising materials management and, equally important, recycling solutions designed for high production efficiency, energy saving and flexibility.
Environment in the green, finances in the black
Recycling offers economic and ecological advantages for bag production companies. A high refeeding rate of regranulate into the tape line offers financial savings in tape production and fast amortisation of the recycling equipment. By adding calcium carbonate to the recycling process, the production waste can be used to produce a masterbatch – the so called recoBATCH – at a favourable cost and thus increase the bag producer’s competitiveness.
Finally, a careful use of raw materials contributes to environmental protection, reduction of the carbon footprint, and resource conservation.
Starlinger has developed optimised equipment for the recycling of production waste along the whole production chain. Volume reduction of endless tapes at the tape line with the compSTAR tape compactor saves storage space, makes production waste easier to handle and reduces its contamination.
recoSTAR universal, the state-of-the-art extrusion and pelletising system for all types of woven bag production waste, delivers high quality regranulate.
Up-cycling of the regranulate is possible by adding calcium carbonate in the recycling process to produce recoBATCH, the self-made masterbatch from production waste.
|Type of waste||Tape production||Other (e.g. film, sheet and injection molding)|
|Endless tape||up to 100%||up to 100%|
|Woven fabric (raffia)||up to 100%||up to 100%|
|Bobbin waste||up to 100%||up to 100%|
|Printed fabric||not recommended||up to 100%|
|Laminated fabric, unprinted||for tapes with reduced tenacity, low line speed||up to 100%|
|Coated fabric, printed||not recommended||up to 100%|
|Conversion waste||not recommended||up to 100%|