Zigzag-folded nonwoven material
AssigneeIrema-Filter GmbH
InventorAndreas Seeberger
Life of this patent
Estimating the term…
Abstract
The invention relates to a method for producing a zigzag-folded nonwoven material for a filter, wherein the nonwoven material is produced by a melt-spinning process, comprising the following work steps: folding the nonwoven material by means of a folding device, whereby a plurality of folds results, wherein the folds divide the nonwoven material into first limbs and second limbs such that the nonwoven material is folded in zigzag form; and subsequently welding a weld region of the first limb of a fold to at least one weld region of the second limb of a fold by means of a thermal-contact welding process, wherein a welded joint is formed between the two facing sides of the limbs of a fold. The invention furthermore relates to a corresponding apparatus and a corresponding nonwoven material.
Claims10
A method for producing a zigzag-folded nonwoven material for a filter, wherein the nonwoven material is produced by a melt-spinning process, comprising the following work steps:
- folding the nonwoven material by means of a folding device, whereby a plurality of folds results, wherein the folds divide the nonwoven material into first limbs and second limbs such that the nonwoven material is folded in zigzag form;
- and subsequently
- welding a weld region of the first limb of a fold to at least one weld region of the second limb of a fold in a plastic welding process, wherein a welded joint is formed between the two facing sides of the limbs of a fold, wherein during the welding a heating element or a plurality of heating elements enter(s) between the limbs of a fold and heats the weld regions, whereby the weld regions come into contact or are brought into contact as the heating element exits and form at least one welded joint, in particular a weld seam.
Dependencies are inferred from the claim text.