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Composite electrical insulation materials (DMD Laminates) based on polymer films

Composite materials based on polyester (PET), polyethylenenaphthalate (PEN) and polyimide (PI) films are traditionally applied for the insulation systems of low-voltage machines and traction motors. Composite materials in the form of tapes are applied as a turn and main insulation. Materials delivered in rolls and sheets are suitable for slot and inter-phase insulation. Type of a polymer film applied in the composition of any material determines its thermal class: PET – film is used in “F” class insulation systems (155 °C), polyethylene naphthalate film (PEN) — “H” (180 °C), polyimide film (PI) — “H” and “C” (200 °C).

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Pressed laminates:

These composite materials are combination of glass cloth , polymer film and mica. They are produced by pressure method and supplied in sheets . The materials are intended for slot and inter-phase insulation.

Name	Composition	Thermal class	Thickness range, mm
GTP-2Pl	PET/Glass cloth/PET	F	0,13-0,50
Teonoflex 919	Glass cloth/PET/Glass cloth	F	0,13-0,50
Teonoflex 191	PET/Glass/PET	F	0,13-0,35
Teonoflex 939	Glass/PEN/ Glass	H	0,13-0,35
Teonoflex 929	PET/ Pl/ PET	C	0,13-0,35
Teonoflex 292	Glass/PI / Glass	C	0,13-0,35

These laminates can also be made in rolls of various width and length.

Insulating tapes with polymer films and glass cloth:

This kind of insulation tapes are used as turn and mainwall insulation of low voltage electrical machines and apparatus.

Name	Composition	Thermal class	Thickness range, mm	Volatiles mass content, max%
LPNK-Т	Glass/PEN film	H	0,045-0,06	2,0
LPNK-Т(l)	Glass /PEN+ adhesive layer	H	0,045-0,06	2,0
LPNK-ТТ	Glass/PEN/Glass	H	0,08-0,13	2,0
LPNK-ТТ(l)	Glass/PEN/Glass + adhesive layer	H	0,08-0,13	2,0
LPMK-Т	Glass/PI	C	0,045-0,11	2,0
LPMK-Т(l)	Glass/PI + adhesive layer	C	0,045-0,11	2,0
LPMK-ТТ	Glass/PI/Glass	C	0,11-0,13	2,0
LPMK-ТТ(l)	Glass/PI/ТGlass+ adhesive layer	C	0,11-0,13	2,0

Laminates based on polymer films with high breakdown voltage:

Intended for insulation of electrical machines.

Name	Composition	Thermal class	Thickness range, mm
Laviterm-1	PET/PI	F	0,15-0,37
Laviterm-2	PI/PET/PI	H	0,17-0,47

Flexible laminates of polyester fleece (paper) with PET film:

Applied as slot, layer and phase insulation in low-voltage electrical motors, generators and transformers.

Name	Composition	Thermal class	Thickness range, mm
PSK 515	PET fleece/PET/PET fleece	F	0,17-0,47
PSK 616	Polyester-aramid fleece/PET-film/ Polyester-aramid fleece	F	0,17-0,47
PSK 51	PET fleece/PET-film	F	0,17-0,42
PSK 61	Polyester-aramid fleece /PET	F	0,17-0,42