Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1984-10-30
1986-02-04
Herbert, Thomas J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
204192E, 360 55, 427129, 428155, B32B 330, C23C 1400
Patent
active
045685983
ABSTRACT:
A reduced friction composite sheet construction comprises a semicrystalline polymeric sheet support having a first and second surface, said surfaces having in the range of 5 to 99 percent crystalline polymeric material and 1 to 95 percent amorphous polymeric material, said first surface having been subjected to sputter-etching which preferentially ablates said amorphous material compared to said crystalline material so as to provide on said first surface ridges or needles of amplitude in the range of 0.01 to 5.0 micrometers, and a separation at their apexes in the range of 0.01 to 1.0 micrometers and having an aspect ratio in the range of 0.5 to 7, said first surface having at least one of static and dynamic coefficients of friction in the range of 0.01 to 0.7, and at least one functional layer coated on said second surface of said support.
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Bilkadi Zayn
Hendrickson William A.
Herbert Thomas J.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Sherman Lorraine R.
Smith James A.
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