Multifunction multilayer PTFE tape and method of manufacture
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United States of America Patent
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Issued Date -
Dec 8, 2005
app pub date -
Jun 3, 2005
filing date -
Jun 3, 2004
priority date (Note) -
Abandoned
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Abstract
A multilayer fluoropolymer-based tape is provided comprising a first layer having a first functional property, a second layer comprising a second functional property and an interstitial tie layer formed from the fibrillation of said adjoining first and second layers during extrusion. Further, a method for manufacturing a multilayer multifunctional fluoropolymer-based tape is provided comprising the steps of: a) selecting a first fluoropolymer-based composition comprising a first functional property, b) selecting a second fluoropolymer-based composition comprising a second functional property different from said first functional property, c) forming a first preform from said first fluoropolymer-based composition, d) forming a second preform from said second fluoropolymer-based composition, e) loading the first and second preforms into an extruder, and f) actuating a ram to force said first and second preforms through a die to form an extruded product comprising a first layer and a second layer physically bonded through a tie layer disposed therebetween. The tie layer comprises a mixture of the material of said first layer and said second layer formed through interstitial fibrillation of the two layers during extrusion.
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