Non-woven mat
OwnerElmer WIERSMAinventor
Life of this patent
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Abstract
The invention described herein relates to non-woven mats and to methods for making same. The mat is formed from fibres that comprise a first polymeric material. The mat comprises a flange-portion (3) that is of greater density than the remaining portion of the mat and that further comprises a second thermoplastic polymeric material having a melting-point temperature that is lower than the melting-point temperature of the first polymeric material. The mats can be used in the formation of plates used in rotating biological contactors (RBCs). Other examples of applications include the formation of air filters, demisters and floating treatment wetlands.
Claims15
A non-woven mat formed from fibres that comprise a first polymeric material, the mat comprises a flange-portion that is of greater density than the remaining portion of the mat and that further comprises a second polymeric material, the second polymeric material is a thermoplastic and has a melting-point temperature that is lower than the melting-point temperature of the first polymeric material.
A method of forming a flange in a non-woven mat, wherein the method comprises the steps of:
- a. providing a non-woven mat formed from fibres that comprise a first polymeric material and from a second polymeric material;
- b. heating the first and second polymeric materials to a process temperature that is higher than the melting-point temperature of the second polymeric material and lower than the melting-point temperature of the first polymeric material, and;
- c. compressing a portion of the non-woven mat so that the portion of the non-woven mat forms a flange-portion.
Dependencies are inferred from the claim text.