A Plain-English Reading of the Toray Lumirror F71 PET Film Datasheet: A Glossy, Transparent Polyester Film at 12 and 19 Micron
This guide explains the Toray Lumirror F71 PET Film technical data sheet (TDS) in plain English, so buyers and engineers can read the figures with confidence.
What Is Toray Lumirror F71 PET Film?
Toray Lumirror F71 PET Film is a glossy, transparent polyester (PET) film from Toray’s Lumirror range. According to its datasheet, it is transparent but has slight roughness for good handling properties. It is offered in two thin grades, 12 and 19 um, and the datasheet lists metallic yarn and dry film photoresist as its applications.
Lumirror F71 at a Glance
- Type: glossy and transparent polyester film with slight roughness
- Available thickness: 12 and 19 um
- Listed properties: transparent, glossy, high Young’s modulus to keep TD flatness (regarding DFR), slight roughness for good handling
- Listed applications: metallic yarn (12 um) and dry film photoresist (19 um)
Key Properties from the Datasheet
Values below are shown as 12 um / 19 um. MD is the machine direction (the running direction of the film) and TD is the transverse direction.
- Tensile strength, MD: 285 / 300 MPa. TD: 240 / 265 MPa (ASTM D882)
- Elongation at break, MD: 125 / 140 percent. TD: 150 / 160 percent (ASTM D882)
- Thermal shrinkage at 150°C for 30 minutes, MD: 1.5 / 1.6 percent. TD: 0.0 / 0.4 percent (ASTM D1204)
- Thermal shrinkage at 190°C for 20 minutes, MD: 2.6 / 4.0 percent. TD: 0.0 / 1.0 percent (ASTM D1204)
- Haze: 1.5 / 1.8 percent (ASTM D1003)
- Coefficient of friction, static: 0.6 / 0.6. Dynamic: 0.5 / 0.5 (ASTM D1894)
What the Numbers Mean
Clarity and gloss. Haze measures how much of the light passing through the film is scattered. A lower number means a clearer film. The datasheet lists 1.5 and 1.8 percent, which is low, and it describes the film as transparent and glossy. At the same time the film keeps a slight roughness, which is the reason for the small amount of haze.
Slight roughness and friction. A very smooth thin film tends to stick to itself and is hard to wind, so a slight roughness is added for good handling (a general explanation, not from this datasheet). The coefficient of friction describes how easily film surfaces slide over each other. The datasheet lists about 0.6 static and 0.5 dynamic for both grades.
Strength and stiffness. Tensile strength shows how much pulling force the film withstands before it breaks. At 285 to 300 MPa in MD and 240 to 265 MPa in TD, this is a strong film for its thickness. The datasheet also says the film has a high Young’s modulus, which means it is stiff, and that this helps keep it flat in the TD direction for dry film photoresist use. Note that the datasheet does not list a numerical modulus value.
Stretch. Elongation at break shows how far the film stretches before it breaks. MD is 125 to 140 percent and TD is 150 to 160 percent.
Heat stability. The datasheet gives shrinkage at two conditions. At 150°C for 30 minutes, MD shrinkage is 1.5 to 1.6 percent and TD shrinkage is 0.0 to 0.4 percent. At the harsher 190°C for 20 minutes, MD shrinkage rises to 2.6 percent for 12 um and 4.0 percent for 19 um, while TD is 0.0 and 1.0 percent. Lower shrinkage means better dimensional stability, which matters in coating, drying, and other heat steps. MD shrinkage is higher than TD for both grades.
Typical Applications: Metallic Yarn and Dry Film Photoresist
The datasheet lists metallic yarn for the 12 um grade and dry film photoresist (DFR) for the 19 um grade. In general, metallic yarn is thread made from thin metallized film and is used in textiles and decoration, while dry film photoresist is a layered material used in making printed circuit boards, where a thin, clear, flat carrier film is needed (general explanations, not from this datasheet). The datasheet does not describe the exact role of the film in either product, so confirm suitability with your own process and test samples.
How to Read the Two Grades
- 12 um is the thinner grade and the one the datasheet links to metallic yarn.
- 19 um is the grade the datasheet links to dry film photoresist, and it shows slightly higher strength and elongation.
- At 190°C the 19 um grade shrinks more than the 12 um grade, so check this line if your process runs at high temperature.
- Compare grades of the same thickness only, since the values change from grade to grade.
Points to Keep in Mind When Reading the TDS
- The values are typical data under specific test conditions and are not intended as limiting specifications, as the datasheet itself notes.
- The datasheet does not list light transmittance, a numerical tensile modulus, surface roughness values, surface tension, or thickness tolerance.
- Only two thicknesses are listed: 12 and 19 um.
- Always test samples on your own line before placing a bulk order.
Related Datasheets from the Same Range
- Toray Lumirror S10 PET Film: a standard clear polyester film from 12 to 350 um
- Toray Lumirror T60 PET Film: a high transparent film from 25 to 250 um
- Toray Lumirror T62 PET Film: a high transparent film for metallizing
- Toray Lumirror E63 PET Film: a low density white film for print receiver use
- Toray Lumirror E60L PET Film: a microvoided white film for LCD back light use
- Toray Lumirror X42 PET Film: a matte film for hot stamping foil
- Toray Lumirror X30 PET Film: a black film for cable tape use
Frequently Asked Questions
What is Toray Lumirror F71 PET Film?
It is a glossy, transparent polyester film with slight roughness for good handling, offered in 12 and 19 um.
What thicknesses does the Lumirror F71 datasheet cover?
12 and 19 um.
How clear is Lumirror F71?
The datasheet lists haze of 1.5 percent at 12 um and 1.8 percent at 19 um.
What applications does the datasheet list?
Metallic yarn for the 12 um grade and dry film photoresist for the 19 um grade.
Are the datasheet values guaranteed?
No. They are typical values under specific test conditions, not limiting specifications.
Can I buy Toray Lumirror F71 PET Film from Jinlu Film?
Yes. Jinlu Film supplies Toray Lumirror F71 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.
Looking for Toray Lumirror F71 PET Film?
Jinlu Film supplies Toray Lumirror F71 PET Film, along with comparable thin glossy polyester film grades, including domestic alternatives, for metallic yarn, dry film photoresist, and similar applications. Tell us your application, thickness, and clarity needs, and contact us for technical data, samples, or a factory quote.
Source: Toray’s publicly available Lumirror F71 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.
