Mechanical part
      1. Horizontal: each transfer roll is horizontal, and the steel roll runout is within 2 microns.
      2. Roller appearance: the transfer roller is smooth, and the scraper blade is free of scratches
      3. Oven temperature: error ± 3 degrees; Fluctuation ± 3 degrees.
      4. Inflation shaft: inflation and deflation are normal.
      5. Both sides have the same strength.
      Product inspection
      1. The substrate is not wrinkled or peeled.
      2. Whether the speed meets the maximum value.
      3. Gap: can be coated within 5mm width.
      4. Large pieces: the error of attached material and empty foil is ± 1mm, the longitudinal thickness fluctuation is ± 3 μ m, the transverse thickness fluctuation is ± 3 μ m, the error between the head and tail thickness and the middle thickness is - 8~+3 μ m (within 5mm width), and the head and tail drag is within 1mm,
      5. Oven: capable of drying at 5 m/min.
      6. Alignment error: ± 1mm.
      7. Appearance of large area: cannot tilt.