E.i. Dupont De Nemours and Company

Benyoussef Y Bisbis

Ernst Johann Hauer

A composting system is provided that includes an enclosure for containing organic matter undergoing composting. The enclosure has an access through which organic waste can be introduced into the enclosure and through which composted matter can be removed from the enclosure. The enclosure has a sloped roof comprised of a composite laminate which includes an air and moisture permeable membrane having an inside surface that faces into said enclosure. The inside surface of the membrane is adhered to an open grid layer. The composting system may further include a device for introducing fresh air into organic matter being composted within the enclosure.

Composting system

A method for ultrasonically joining flashspun bonded polyolefin sheets and a seam generated by the method is provided. The method includes the steps of overlapping at least two polyolefin sheet edges, and connecting the overlapped edges by feeding the overlapped portions between an ultrasonic horn and a patterned backup roll. The connected first and second sheet edge portions have a tensile strength across the overlapped and welded portion that is at least 75% of the tensile strength of the sheet material joined. The seam is generated with just one pass between the ultrasonic horn and the patterned backup roll.

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Echternach, Luxembourg

Benyoussef Y Bisbis