Storage of man-made fibres


Actually, storage of man-made fibres ties up less capital than the storage of cotton fibres. On the one hand, this is due to the short distance of the man-made fibre manufacturer from the mill and on the other hand to the short delivery times. However, a disadvantage that should not be underestimated (especially in the colder seasons) is the behaviour of synthetic fibres when subjected to temperature and moisture.

If the fibres are stored in a cold room, as is usual, and the bales are opened immediately after transport into the blowroom, condensation will form on the surface of the fibres. This condensation makes normal processing of the fibres impossible, especially in the blowroom and the carding room, and it also affects the spin finish. Synthetic fibres are usually well and hermetically packed by the manufacturer. Such fibres must be left to stand in an unopened condition for at least 24 hours in the blowroom or in another room at the same ambient temperature before the opening process can begin. During this period, the fibres in the bale adapt to the prevailing temperature.

Very long periods of storage should be avoided not only for economic reasons but also because the properties of the spin finish, and hence the processability, can change during storage. However, if a good spin finish has been used, no changes are to be expected for a storage period of one to two years. Processability is also affected by exposure to strong sunlight and should therefore be avoided.