Method for producing a wet-laid nonwoven fabric
AssigneeVoith Patent GmbH
InventorsJuan Paniagua, Andreas Boegershausen, Frank Schicht
Life of this patent
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Abstract
A method for producing a wet-laid nonwoven fabric web includes the following steps: providing a fibrous web of industrially generated inorganic fibers, or fibers from synthetically generated polymers, and thermally drying the fibrous web in an alternating manner by infrared radiation and hot air, in order for the nonwoven fabric web to be generated.
Claims20
A method of producing a wet-laid nonwoven fabric web, the method comprising the following steps:
- a) providing a fibrous web formed of industrially generated inorganic fibers, or fibers from synthetically generated polymers;
- and
- b) thermally drying the fibrous web by alternatingly subjecting the fibrous web to infrared radiation and to hot air, to generate the nonwoven fabric web, and thereby blowing the hot air onto the fibrous web with air blowers that aspirate fresh air.
A drying device for producing a wet-laid nonwoven fabric web, the drying device comprising:
- a forming screen for carrying a fibrous web formed from a fibrous suspension of industrially generated inorganic fibers, or fibers from synthetically generated polymers;
- a plurality of combination dryers disposed along the forming screen in a running direction of the fibrous web to be dried;
- each of said combination dryers including at least one infrared dryer and at least one hot air dryer, and said hot air dryer of each said combination dryer being disposed downstream of said infrared dryer in the running direction of the fibrous web to be dried, and being configured to aspirate fresh air.
A drying device for producing a wet-laid nonwoven fabric web which is generated by depositing a fibrous web from a fibrous suspension containing industrially generated inorganic fibers, or fibers from synthetically generated polymers, the drying device comprising a plurality of combination dryers disposed along the drying device in a running direction of the fibrous web to be dried, wherein each said combination dryer includes at least one infrared dryer and at least one hot air dryer, and said hot air dryer of one and the same combination dryer in the running direction of the fibrous web is in each case disposed downstream of the infrared dryer of one and the same combination dryer, and wherein said hot air dryer is configured to aspirate fresh air, to heat the fresh air with thermal energy contained in exhaust gas generated by said infrared dryer, and to blow the heated fresh air onto the fibrous web to be dried.
Dependencies are inferred from the claim text.