Bismaleimide fiberglass sheet

Product Introduction

Bismaleimide fiberglass sheet is a laminated product made of specially treated alkali-free glass cloth for electricians, impregnated with bismaleimide resin though baking and hot pressing. It has high mechanical strength and dielectric properties, and good radiation resistance.

Application range

Bismaleimide fiberglass sheets are suitable for insulating structural parts of high temperature resistant motors and electrical appliances, such as motor slot wedges, gaskets and outlet plates, dry-type transformer stays, gaskets and terminal blocks, etc.

Motor industry: Suitable for slot wedge insulation, liner insulation and inter-turn insulation in the stator windings of motors such as automotive generators, three-phase asynchronous motors, and electric vehicle motors.

motor insulation paper

Bismaleimide Laminated Glass Cloth sheet Parameter

Standard			GB/T 1303-2009/ IEC60893-2004
Basic Information	Chinese Name		–
	IEC		BMIGC301
	NEMA		–
	Basic Material		Glass Fiber Cloth
	Resin		Bismaleimide
	Color		Brownish Red
No.	Test Item	Unit	Value
1	Density	G/M³	1.8~1.95
2	Vertical Layer Bending Strength(Normal)	Mpa	≥350
3	Parallel Layer Impact Strength (Simply Supported Beam Method)	KJ/M²	≥60
4	Vertical Layer Electrical Strength (90℃ Transformer Oil)(1mm Thickness)	Kv/Mm	≥14.0
5	Parallel Layer Breakdown Voltage (90℃ Transformer Oil)	Kv	≥35
6	Dielectric Constant (50Hz)	–	≤5.5
7	Dielectric Loss Factor(50Hz)		≤0.05
8	Insulation Resistance After Immersion	Ω	≥1.0*10^8
9	Proof Tracking Index(PTI)	–	≥280
10	Combustibility	–	HB40
11	Temperature Index	–	180
12	Water Absorption (1-20mm Thickness)	Mg	64~193
Note: Range Value Are Measured For Different Thicknesses

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