250 Micron PET Film

Films Protection Company is a manufacturer of 250 micron pet film for insulation parts, die-cut components and flat panel backing that need stable thickness, low curl and clean edge forming. This 250um / 0.25mm PET film has more body than thinner grades, helping punched washers, spacer layers and support inserts keep shape during cutting, handling and assembly. With typical +/-5% thickness control and checked lay-flat condition, it is made for parts where hole accuracy and repeatable size matter.

Product Overview

This 250 micron pet film is made for parts that need a stable PET base, not just a thin flexible layer. At 0.25mm, it feels firm enough for support applications while still being practical for punching and cutting. Its typical density is about 1.39 g/cm3, giving enough body for gaskets, washers and spacers without the bulk of a rigid plastic sheet.

Small conversion details matter. When a drawing includes screw holes, narrow bridges, window cuts or wide flat areas, the film must feed smoothly and stay flat before the tool closes. A stable sheet helps reduce shifted holes, uneven edges and parts that lift during waste stripping.

For electrical insulation gasket production, typical dielectric strength can reach >=14 kV at 250um thickness, and volume resistivity is commonly >=1 x 10^14 ohm.cm. These values help the film work as an insulating barrier, while the 0.25mm gauge helps punched parts keep their shape. For panel backing and spacer layers, Films Protection Company checks lay-flat condition, winding control and slitting edge quality before release to reduce curled corners, edge tearing and unstable feeding.

Benefits

• Firmer structure than thinner PET grades for gasket, washer and spacer parts.
• 25mm thickness helps converted parts hold shape after punching or assembly.
• Typical tensile strength of 150-220 MPa supports cutting and waste stripping.
• Smooth surface helps create cleaner outlines, sharper holes and easier waste removal.
• Low-curl handling improves sheet contact, tool registration and feeding stability.
• Good insulating performance for washers, barriers and coil separators.
• Thermal shrinkage is typically <=1.5% at 150 C / 30 min for dimensional control.
• Controlled slitting edge helps reduce tearing risk under proper tooling.

How does flatness and curl control affect punching and cutting quality?

For a 250um / 0.25mm PET base, flatness is a practical processing issue. If the sheet curls before the blade closes, the cutting position may shift and small holes can lose accuracy. Curl can also make waste removal harder around narrow bridges, slots or window-shaped parts. A flatter thick PET film keeps better contact with the cutting bed, so insulation pieces, spacer components and panel backing inserts can be made with cleaner edges and more repeatable outlines.

TDS

Applications

• Electrical insulation gasket for electronic and electrical assemblies.
• Die-cut spacer for controlled gap separation between layers.
• Punched PET washer for screws, terminals or conductive contact areas.
• PET shim for height adjustment, separation and support.
• Panel backing for control panels, nameplates and display inserts.
• Membrane switch spacer or internal support layer.
• Coil separator, insulation barrier and electrical pad.
• Custom punched PET parts with holes, slots, windows or narrow bridges.

What makes 250um / 0.25mm PET film suitable for electrical insulation gaskets and panel support?

The 250um / 0.25mm thickness gives this PET film more body than thinner films while still allowing accurate punching, cutting and die-cutting. In an electrical insulation gasket, it helps isolate conductive areas without using bulky rigid plastic. In a die-cut spacer, stable thickness supports consistent gap control. In panel support applications, the smooth low-curl surface works as a flat backing layer, helping the finished part stay aligned, clean-edged and easier to assemble.

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FAQ

Is 250 micron PET film the same as 250um / 0.25mm PET film?

Yes. 250 micron, 250um and 0.25mm describe the same thickness.

Can this film be used for electrical insulation gaskets?

Yes. Its insulating performance and firm structure make it suitable for gasket, washer and barrier parts.

Is the film suitable for punching small holes?

Yes. With suitable tooling, it can be punched or cut into holes, slots and spacer shapes with clean edges.

Can Films Protection Company supply custom colors or converted sizes?

Yes. Clear, translucent, milky white, black and converted sizes can be discussed according to part design and processing method.