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- Material family: PET film, polyester film, and BOPET film for industrial converting
- Density reference: general clear PET film is commonly estimated at 1.38-1.40 g/cm3
- Calculation focus: thickness conversion, GSM, roll weight, yield, and load estimation
- Mechanical data: MD/TD tensile strength, elongation, modulus, shrinkage, and flatness
- Optical data: transmittance, haze, gloss, clarity, color tone, and visible defects
- Processing data: dyne level, corona treatment, COF, roll quality, and surface stability
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- Main test: release force between adhesive and PET silicone release surface
- Slow peel reference: 180-degree peel at 300 mm/min
- Alternative check: 90-degree peel for selected fixture or vertical separation evaluation
- Common sample width: 25 mm
- Common test environment: 23 C +/-2 C and 50% RH +/-5% RH
- Core QC items: release force, residual adhesion, silicone transfer, temperature aging, coating anchorage, surface defects, and roll quality
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- Base film: LDPE, LLDPE, LDPE / LLDPE blend or HDPE-influenced PE
- Thickness reference: 30-100 um for protective-film material comparison
- Density range: typically 0.910-0.965 g/cm3
- Main calculations: GSM, roll weight, coverage area and net film weight
- Test focus: density, tensile strength, elongation, peel adhesion and clean removal
- Roll checks: fish eyes, gels, thickness profile, end face and roll flatness
