Packing for powder or gaseous materials

摘要

The packing has a bag-like packing material made wholly or partially from air and gas-permeable fleece whose air and gas permeability is so great that when packing any build up of air and/or gas can escape through the fleece material. At least half of the packing bag is made of this permeable fleece material which has a surface weight of 30 g/sq.m to 200 g/sq.m and an air throughput of 1100 1 per min to 300 1 per min with a 5 mm water column.