Toray Lumirror F65 PET Film is a 12 micron standard base for stamping foil, built to run through coating and drying ovens without wrinkling in the machine direction
A foil maker’s biggest headache is a base film that wrinkles in the dryer. Toray Lumirror F65 PET Film is designed to avoid heat wrinkles in the machine direction during drying, with high strength and good handling properties.
What the Datasheet Promises
According to its datasheet, F65 is designed for easy handling during processing, especially in hot stamping applications, because of its high strength and good handling properties. It lists three properties: high strength with good handling, a low coefficient of friction that helps smooth coating and finishing, and resistance to heat wrinkle formation in the machine direction during coating. The listed applications are hot stamping foil and metallic yarn. Only one thickness is offered, 12 um.
The Numbers the Datasheet Gives
- Thickness: 12 um
- Tensile strength: about 300 MPa in MD and 250 MPa in TD (ASTM D882)
- Elongation at break: about 120 percent in MD and 150 percent in TD (ASTM D882)
- Heat shrinkage at 190°C for 20 minutes: about 2.1 percent in MD and about 0.1 percent in TD (ASTM D1204)
- Coefficient of friction: about 0.6 static and 0.4 dynamic (ASTM D1894)
- Haze: listed, but the value is not clear in the text available here (ASTM D1003)
Two of these figures explain the design. The MD tensile strength of about 300 MPa is high for 12 um, which helps the film run under tension. The 190°C shrinkage is given in the harsher drying condition, with MD shrinkage higher than TD, which is the direction where heat wrinkles form. A “well balanced” shrinkage profile matters here because uneven movement is what causes wrinkles (a general explanation, not from this datasheet). Note that MPa is force per unit area, so at 12 um the total load the film carries is small, and tension control on the line matters.
How It Differs from Neighboring Grades
- Toray Lumirror X42 PET Film and its X43 and X44 siblings are the matte options for hot stamping foil, with gloss of about 19 to 45 percent. F65 is the standard, non-matte base, so it suits foil designs that do not need a matte look.
- Toray Lumirror F71 PET Film is also a 12 um film for metallic yarn, with MD tensile strength of about 285 MPa and 190°C shrinkage of about 2.6 percent in MD. F65 is slightly stronger in MD (about 300 MPa), shrinks a little less at 190°C (about 2.1 percent), and is listed for both stamping foil and metallic yarn.
What the Datasheet Does Not Say
- The values are typical data under specific test conditions and are not limiting specifications, as the datasheet itself notes.
- The haze value is not clear in the text available, and there is no gloss, surface roughness, surface tension, or thickness tolerance.
- No data on heat wrinkle resistance is quantified beyond the description.
- Only one thickness is offered. Some numbers are approximate. Please check the official datasheet for exact values.
Quick Answers
What is Lumirror F65?
A 12 um standard polyester film designed as a base for hot stamping foil, with high strength and resistance to heat wrinkles in the machine direction.
What applications does the datasheet list?
Hot stamping foil and metallic yarn.
What thickness is available?
12 um only.
Can I buy Toray Lumirror F65 PET Film from Jinlu Film?
Yes. Jinlu Film supplies Toray Lumirror F65 PET Film. If you prefer a comparable-specification alternative, including domestic options, we can offer those as well, together with datasheets and samples so you can test them on your own line.
More PET Film Guides
- Toray Lumirror U94 PET Film: a super clear film treated on both sides
- Toray Lumirror U60 PET Film: a co-extruded transparent film for window film
- Toray Lumirror C21 PET Film: a 6 micron film for capacitors
- Toray Lumirror S56 PET Film: a low shrinkage film for FBT and FPC
Sourcing Stamping Foil Base
Jinlu Film supplies Toray Lumirror F65 PET Film, along with comparable high strength polyester film grades, including domestic alternatives, for hot stamping foil and metallic yarn. Tell us your coating process, drying temperature, and thickness, and contact us for technical data, samples, or a factory quote.
Source: Toray’s publicly available Lumirror F65 technical data sheet (typical values). Please refer to the latest official version. Lumirror, Toray, and related names are trademarks of their respective owners. This article is an independent explanation for reference only.
