Ultrasonic seaming of spunbonded polyolefin sheet material

Details Ultrasonic seaming of spunbonded polyolefin sheet material Ultrasonic seaming of spunbonded polyolefin sheet material

1996-02-12

1999-07-06

Ahmad, Nasser

Stock material or miscellaneous articles

Sheets or webs edge spliced or joined

2 2, 2 77, 2 79, 428 58, 428 61, 428192, 428903, B32B 300

Patent

active

059195398

ABSTRACT:
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.

REFERENCES:
patent: 3169899 (1965-02-01), Steuber
patent: 4670073 (1987-06-01), Langley
patent: 4683593 (1987-08-01), Langley
patent: 4938817 (1990-07-01), Langley
patent: 5492753 (1996-02-01), Levy
Boggs, "Vibrate Your Parts Together", Design News (Aug. 2, 1993).

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