Method for producing a pleatable filter material from a nonwoven fabric
AssigneeFirma Carl Freudenberg
InventorsKlaus Veeser, Anthony Hollingsworth, Dirk Dantz
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Abstract
A method for producing a pleated filter material from a nonwoven fabric having spacers for the pleated folds formed from the filter material itself, a formed fabric made of stretched synthetic fibers and thermoplastic and/or thermally cross-linked binding agent being heated in an oven to a temperature lying at least in the softening temperature range and/or the cross-linking temperature range of the binding agent, and subsequently, the formed fabric being formed between profiled calender rolls and cooled simultaneously.
Claims22
A method for producing a pleatable filter material from a nonwoven fabric having spacers for pleated folds formed from the filter material, comprising the steps of:
- heating a formed fabric in an oven to a predetermined temperature, the formed fabric including stretched synthetic fibers and at least one of a thermoplastic and a thermally cross-linked binding agent, the predetermined temperature being within at least one of a softening temperature range and a cross-linking temperature range of the binding agent;
- and
- after the heating step, simultaneously forming the formed fabric between profiled calender rolls and cooling the formed fabric to form a pleatable filter material.
Dependencies are inferred from the claim text.