Method of making polyolefin spunmelt/film composite material and product made thereby
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United States of America Patent
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Issued Date -
Dec 4, 2003
app pub date -
May 31, 2002
filing date -
May 31, 2002
priority date (Note) -
Abandoned
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Abstract
A method of making spunmelt/film composite materials, as well as the product of the method, is described. The method is a continuous in-line process including in-line production of a continuous filament spunmelt web, placement of a film on the spunmelt web, optional placement of at least one nonwoven fabric on the film, joining or bonding of the formed layered structure by subjecting the layered structure to calendering using heated rolls. The basis weight of the continuous filament spunmelt web is from about 13.5 gsm to about 100 gsm and of the polyolefin film from about 10 gsm to about 40 gsm. The total composite basis weight tolerance ranges from about 25 gsm to about 150 gsm. No adhesive or secondary thermal bonding is utilized in the process.
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