347/347F High strength fiberglass sheet

Product Introduction

347/347F High strength fiberglass sheet is a laminate made of treated alkali-free glass fiber cloth impregnated with F-class benzoxazine resin and hot-pressed. It has good mechanical, electrical properties, and flame retardancy, especially high mechanical strength retention and excellent electrical properties at high temperatures.

347F High strength fiberglass sheet

Application Range

347/347F High strength fiberglass sheet is suitable for use as a high-quality insulating structural part in F-class motors and electrical equipment. It has the advantages of good processability and strong applicability among similar products.

Technical Parameter

NO.	ITEM		UNIT	INDEX VALUE
				347	347F
1	Density		g/cm³	1.8-2.0	1.8-2.0
2	Water absorption Rate		%	≤0.5	≤0.5
3	Vertical bending strength	Normal	MPa	≥440	≥400
		155±2℃		≥280	≥250
4	Compression strength	Vertical	MPa	≥350	≥300
		Parallel		≥260	≥200
5	Impact strength (charpy type)	Lengthway no gap	KJ/m²	≥147	≥129
		Horizontal no gap		≥98	≥77
6	Bonding strength		N	≥7200	≥6800
7	Tensile strength	Lengthway	MPa	≥280	≥240
		Horizontal		≥200	≥180
8	Vertical electric strength （in oil of 90℃±2℃）	1mm	KV/mm	≥14.2	≥14.2
		2mm		≥12.4	≥12.4
		3mm		≥11.5	≥11.5
9	Parallel breakdown voltage(1 min in oil of 90℃±2℃）		KV	≥45	≥45
10	Dielectric dissiption factor（50Hz)		–	≤0.04	≤0.04
11	Volumn Insulation Resistance	Normal	Ω	≥1.0×1012	≥1.0×1012
		After soaking for 24hours		≥1.0×1010	≥1.0×1010
12	Combustibility（UL-94)		Level	V-1	V-0

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