MMM(PET) composite film

It is used as an insulating barrier between the high- and low-voltage windings of transformers and can replace the 3640 glass‑cloth tube insulating sleeve.

Keywords:

insulation Material

Category:

Product Description

Product Description:

Polyester film composite materials are manufactured by laminating three layers of polyester film (or two or four layers) using imported Class F adhesive.

The polyester‑film composite film, a flexible laminated material, is rated Class B for heat resistance (130°C) and exhibits excellent mechanical properties, including tensile strength and edge tear resistance, as well as superior electrical strength; its surface is smooth.

Polyester film composite films, as flexible composite materials, are primarily used in transformers as interlayer insulation for high- and low-voltage windings; they can also serve as slot liners in electric motors and as insulating gaskets in other electrical appliances.

Properties of MMM(PET) Composite Films

Serial number	Project	Unit	0.5 PET film	1.1 PET Film	1.4 PET film
1	Thickness	mm	0.5	1.1	1.4
2	Thickness tolerance	%	±10	±10	±10
3	Quantitative	g/㎡	700	1540	1960
4	Quantitative tolerance	%	±15	±15	±15
5	Permissible width deviation	mm	≤60 bands: ±0.5 >60≤1000: ±0.8 >1000: ±1
6	Single-layer film thickness	mm	0.25	0.35	0.35
7	Breakdown voltage	kV	≥25	≥30	≥35