New bag filter saves energy

Electricity savings of up to 20% are said to be achievable through the use of a new environmentally friendly bag filter called dECOb which has been jointly-developed by Japanese companies Asahi Kasei and Asamasu.
The filter material is Asahi’s Smash polyester spunbond nonwoven with a fine concave/convex surface pattern which is said to increase the dust collection volume and reduce pressure drop, resulting in significant energy savings compared to conventional filter bags.
In addition, it allows the filter system to be reduced considerably in size.
Smash polyester spunbond nonwoven has the formability of a thermoplastic and can be easily heat-press moulded.
It exhibits excellent formability by deep drawing and is light weight and tear resistant.
The simple moulding process suggested by the company involves the smash sheet being placed on the mould machine and fixed to the rim, followed by a two heated moulds being placed together to form the shape and removal.
Smash also has shape memory which can be exploited at temperatures of above 50ºC and excellent air and liquid permeability, which is retained during forming.
The product is completely binder free and its smooth surface enables it to be printed. Initial end-use products for it have included food containers, moulded filters, plant pots, automotive components and air-permeable containers.
Asahi Kasei and Asamasu have targeted annual sales worth Yen 1 billion for the dECOb bag filter product by 2015, and will introduce bags made from other fibres for higher heat and chemical resistance in the near future.
The new product was introduced at the ENEX 2010 Global environment exhibition at Tokyo Big sight.

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