Polyester film water absorption is the percentage mass increase of a PET specimen after controlled water exposure. This TDS covers bare, treated, coated, and adhesive-backed PET constructions. Interpret results with thickness, conditioning, water temperature, exposure duration, and construction. Reference data can screen materials, but confirm the actual grade and finished structure by representative testing.
Protective lens film for spray booths is used as a replaceable transparent layer over a viewing window so paint overspray, dry spray, dust, and routine wiping contact the film before they reach the clear substrate. This guide is intended for glass, coated glass, acrylic, and polycarbonate observation panels used in automotive refinishing and industrial coating areas. The main risks are reduced visibility, trapped contamination, edge lifting, adhesive transfer, film tearing, and an unverified removal interval. Selection should be based on the actual window material, coating condition, optical requirement, booth temperature, cleaning method, vertical holding need, and a sample test that continues through the planned service period.
Polyester film chemical resistance depends on the tested film construction, chemical concentration, contact temperature, exposure time, and applied stress. This technical data supports bare BOPET, surface-treated PET, and adhesive-backed protective film used on glass, metal, plastic, painted, or coated surfaces. Reference values help define a test plan, while the actual chemical, surface, dwell period, and removal behavior should be confirmed through representative sample testing before full use.
