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Thicknesses(mm) 0.38+/- 0.015 0.76+/-0.02 Uniformity Horizontal thickness warp shouldn't exceed 15um at a distance of 25mm; Horizontal thickness warp shouldn't exceed 20 um at a distance of 50mm Length tolerance (m) 0-5 0-2 Width tolerance (mm) 0-10 Moisture content (%) 0.3-0.6 Extending intension (M Pa) ≥ 20.0 Rupture extendingrate(%) ≥ 200 Fograge (%) < 0.4 Shrinking rate ( 60°C/15min) (%) <8
Poly (vinyl alcohol) carboxy butyl aldehyde resin (PVB)