Toray Lumirror H10 PET Film: TDS Explained for Motor Insulation Applications

A Plain-English Reading of the Toray Lumirror H10 PET Film Datasheet: A Hazy Plain Polyester Film from 75 to 500 Micron

This guide explains the Toray Lumirror H10 PET Film technical data sheet (TDS) in plain English, so buyers and engineers can read the figures with confidence.

What Is Toray Lumirror H10 PET Film?

Toray Lumirror H10 PET Film is a hazy plain polyester (PET) film from Toray’s Lumirror range. According to its datasheet, it has excellent handling properties and electrical properties, and it is described as a standard base for motor insulation. The datasheet lists available thicknesses from 75 to 500 um, and the data table also includes a 50 um column.

Lumirror H10 at a Glance

• Type: hazy plain polyester film, standard base for motor insulation
• Available thickness: 75, 100, 125, 188, 210, 250, 300, 350, and 500 um (the table also shows a 50 um grade)
• Listed properties: hazy surface for excellent handling, good stiffness to be inserted into motor
• Listed rating: UL746B RTI, electrical 105°C and mechanical 105°C
• Listed applications: electrical insulation such as motor slot liner and wedge, die-cut insulation, and more

Key Properties from the Datasheet

The table covers ten grades, from 50 um to the 500 um grade (measured at about 480 um). MD is the machine direction (the running direction of the film) and TD is the transverse direction. Because the table is wide, the lines below give the values at both ends of the range.

• Tensile strength, MD: about 249 MPa at 50 um, easing down to about 133 MPa at the thickest grade (ASTM D882)
• Tensile strength, TD: about 249 MPa at 50 um, easing down to about 139 MPa at the thickest grade (ASTM D882)
• Elongation at break, MD: about 152 percent at 50 um, rising to about 244 percent at the thickest grade (ASTM D882)
• Elongation at break, TD: about 142 to 212 percent depending on grade (ASTM D882)
• Thermal shrinkage at 150°C for 30 minutes, MD: about 0.9 to 1.7 percent, lower for thicker grades (ASTM D1204)
• Thermal shrinkage at 150°C for 30 minutes, TD: about 0.4 to 0.8 percent (ASTM D1204)
• Breakdown voltage: 11.5 kV at 50 um, then 14.3 / 16.6 / 18.7 / 23.5 / 25.1 / 27.5 / 30.0 / 31.3 / 39.6 kV for the thicker grades (ASTM D149)
• Volume resistivity at 20°C: about 3E+17 to 5E+17 ohm-cm (ASTM D149)
• Dissipation factor at 20°C and 1 kHz: about 40 to 45, in units of 1E-4 (JIS C2151)

What the Numbers Mean

Hazy surface and handling. The datasheet describes a hazy surface that gives excellent handling properties. In general, a slightly rough, matte-like surface helps film slide and wind smoothly and reduces sticking between layers (a general explanation, not from this datasheet). The datasheet does not give a haze value, so this film is chosen for handling rather than clarity.

Breakdown voltage. This is the voltage at which the film fails electrically, so a higher number means stronger insulation. It rises steadily with thickness, from 11.5 kV at 50 um to 39.6 kV at the thickest grade. If insulation strength is your priority, this is the line to read first. The datasheet does not list the detailed test conditions.

Volume resistivity. Values of about 3E+17 to 5E+17 ohm-cm at 20°C are very high, which means the film strongly resists current passing through it. This supports the datasheet description of excellent electrical properties.

Dissipation factor. This describes how much electrical energy a material loses as heat in an alternating field, and a lower value is generally better for insulation. The datasheet lists the unit as 1E-4, so the values of about 40 to 45 correspond to roughly 0.004 to 0.0045. They are fairly steady across thicknesses.

Strength and stiffness. Tensile strength shows how much pulling force the film withstands before it breaks. It is highest in the thinner grades and lower in the very thick grades. Note that MPa is force per unit area, so a thick film can still carry more total load. The datasheet also says the film has good stiffness so that it can be inserted into a motor, which suits slot liners and wedges that must hold their shape.

Heat stability. After 30 minutes at 150°C, MD shrinkage is about 0.9 to 1.7 percent and TD shrinkage is about 0.4 to 0.8 percent. Lower shrinkage means better dimensional stability, which matters during varnish curing and other heat steps. MD shrinkage is higher than TD for all grades.

Thermal rating. The datasheet lists a UL746B relative thermal index (RTI) of 105°C for both electrical and mechanical properties. RTI is a UL rating related to the temperature a material can withstand in long-term use. For a specific end product, please confirm the current UL listing.

Typical Applications

The datasheet lists electrical insulation, with motor slot liner and wedge as examples, and die-cut insulation. The combination of high breakdown voltage, high resistivity, stiffness, and a hazy handling surface is what makes it a standard base for motor insulation. Suitability always depends on your own process and the requirements of your motor design, so test samples first.

How to Read the Thickness Range

• If insulation strength is your priority, look at the breakdown voltage line first. It grows with thickness.
• If you need the highest tensile strength, the thinner grades show the highest figures.
• If you need low shrinkage in MD, the thicker grades show about 0.9 to 1.1 percent.
• 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.
• Most lines are summarized here as approximate ranges. Please check the official datasheet for the exact figure at your thickness.
• The datasheet does not list haze, light transmittance, surface roughness, surface tension, or thickness tolerance.
• The available thickness line starts at 75 um, while the table also shows a 50 um grade. Please confirm availability when ordering.
• 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 H10 PET Film?
It is a hazy plain polyester film with excellent handling and electrical properties, described in its datasheet as a standard base for motor insulation.

What thicknesses does the Lumirror H10 datasheet cover?
The available thickness line lists 75 to 500 um, and the data table also shows a 50 um grade.

What is the breakdown voltage of Lumirror H10?
The datasheet lists 11.5 kV at 50 um, rising with thickness to 39.6 kV at the thickest grade.

What applications does the datasheet list?
Electrical insulation such as motor slot liner and wedge, die-cut insulation, and more.

Are the datasheet values guaranteed?
No. They are typical values under specific test conditions, not limiting specifications.

Can I buy Toray Lumirror H10 PET Film from Jinlu Film?
Yes. Jinlu Film supplies Toray Lumirror H10 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 H10 PET Film?

Jinlu Film supplies Toray Lumirror H10 PET Film, along with comparable polyester film grades for electrical insulation, including domestic alternatives, for motor slot liners, wedges, and similar applications. Tell us your application, thickness, and insulation needs, and contact us for technical data, samples, or a factory quote.

Source: Toray’s publicly available Lumirror H10 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.