| Product Description: Mylar® P25T is a transparent polyester packaging film designed to be combined with a sealant layer, where the resulting structure will be shallow draw thermoformed. It has a corona surface treatment for improved bonding to inks and adhesives. Standard thicknesses are 50 and 75 gauge, although other thicknesses may be available upon special request. The treated side of P25T normally is wound toward the core, but this can be reversed upon request. General Product Info: The 50 gauge film can be formed to a maximum draw depth of 1 1/8 in (28 mm), where the draw ratio (area/area) does not exceed 2.0. The 75 gauge P25T can be thermoformed to a maximum draw depth of 1 1/2 in (38 mm) with a maximum draw ratio of 2.25. Good temperature control is essential for satisfactory thermoforming. Observation of excessive web thinning and/or frequent "poppers" during thermoforming usually indicate that the forming temperature should be increased. The preferred process for making multilayered structures with P25T is through adhesive lamination, because relatively low web temperatures can be used. While extrusion coating also is an option, extra care must be taken to prevent unwanted stretching of the web. For the same reasons, care must be exercised when subjecting P25T to any converting process involving heating or drying. Combinations of P25T and a sealant layer are used in peelable lidding, medical packaging, and as the formed web in hermetically sealed pouches for "heat-in-bag" applications for frozen entrees and vegetables. It is also used in similar applications, particularly where the oxygen barrier properties provided by PVdC-coated films are not required. Approvals: FDA Food Contact Status - All gauges of Mylar® P25T comply with the Food and Drug Administration regulation 21 CFR 177.1630 -- Polyethylene phthalate polymers. This regulation describes films which may be safely used in contact with all types of food excluding alcoholic beverages. Uncoated films such as Mylar® P25T can be used to contain foods during oven cooking or oven baking at temperatures above 250°F. Information provided by DuPont. |
