| Product Description: Mylar® RB42AF is a biaxially oriented polyester (OPET) film with an ethylene vinyl acetate (EVA) heat seal layer and polyvinylidene chloride (PVdC) layer on the opposite side. Mylar® RB42AF is essentially Mylar® RL42AF with a barrier layer. It is used as a heat sealable lidding film in packaging frozen and refrigerated foods. Mylar® RB42AF is commercially available in nominal 100 gauge. Mylar® RB42AF is designed to produce strong seals to polypropylene (PP). Although designed especially to seal to polypropylene, Mylar® RB42AF seals to a broad range of container substrates including amorphous polyester (APET, also PETG), semicrystalline polyester (CPET), polyester coated paperboard, polyvinylchloride (PVC), polyethylene (HDPE), and polystyrene (HIPS). Mylar® RB42AF produces a stronger seal to polypropylene than Mylar® RB5. Like Mylar® RL42, Mylar® RB42AF can produce tearing seals to polypropylene and other substrates under chilled conditions. Like the other "RL" types with EVA heat seal layer, Mylar® RB42AF has a lower seal initiation temperature than lidding films with an amorphous polyester heat seal layer (e.g., Mylar® OL, OL2). This allows good seals to be made at higher line speeds (or using lower sealing temperatures). Mylar® RB42AF can withstand freezing temperatures down to -40°F and foods can be heated or cooked in contact with this film if food temperatures do not exceed 250°F. The oriented polyester base film will begin to distort in the range of 425-450°F. Special Features: Corona Treatment: Mylar® RB42AF is not available with corona treatment. However, the PVdC surface of the film is suitable for printing and laminating. Anti-fog: Mylar® RB42AF lidding films come with anti-fogging capability to provide better clarity when stored and displayed in refrigerated conditions. Approvals: FDA Food Contact Status - All gauges of Mylar® RB42AF comply with the Food and Drug Administration regulation 21 CFR 177.1630 -- Polyethylene phthalate polymers, Sections (f) and (g). This regulation describes films which may be safely used in contact with all types of food, excluding alcoholic beverages, at temperatures not to exceed 250°F. Information provided by DuPont. |
