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AssigneeGroz-Beckert KG
InventorsRalph Berkemann, Fabian Stauss, Frank Endriss, Andreas Tulke
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A method for producing a pleatable textile object having electrostatically charged fibres, and to a pleatable textile object is described. At least two separate dies are used, one for the production of finer fibres and one for the production of coarser fibres, using a melt spinning process. At least the first die, which is used to produce the coarser fibres, has concentric orifices. The finer and coarser fibres are mixed at least in sections during the process and are also charged electrostatically with the aid of a polar liquid. The textile object can be used to make filters with a quality factor in excess of 0.2.
A method for producing a pleatable textile object having electrostatically charged fibres, comprising:
A pleatable textile object consisting of fibres produced by a meltblown spinning process, comprising fibres of a first fibre type which consist, formed of a first polymer, and fibres of a second fibre type which consist, formed of a second polymer, wherein an average of the fibre diameter of the first fibre type is larger than 10 and an average diameter of the fibres of the first fibre type is greater than an average diameter of the fibres of the second fibre type, and, at least in a partial volume of the textile object, proportions of the fibres of the first fibre type and of the fibres of the second fibre type show a gradient over a cross section of the textile object, wherein at least some of at least one the fibres of the first and of the second fibre type are electrostatically charged, wherein the textile object is suitable for manufacturing filters with a quality factor in excess of 0.2.
Dependencies are inferred from the claim text.