Test items	unit	Test conditions	General Fibre	Heat and water resistant fiber		Flame retardant fiber
			HB-77N	K-57N	RK-76(S)GY	NF-77(N)GY	RNF-77GY
Thickness	mm	23℃50％RH	2.00	2.00	–	–	–
Paper weight in gsm	g/m²		2570	2700	–	–	–
Density	g/cm³		1.29	1.35	–	–	–
Tensile strength (Machine direction)	Mpa		111	103	–	–	–
Tensile strength (Cross direction)			60	55	–	–	–
Bending resistance (Machine direction)	mm		19.1	–	–	–	–
Bending resistance (Cross direction)			6.4	–	–	–	–
Thermal contraction rate (Machine direction)	%	105℃/5hrs	0.6	0.8	–	–	–
Thermal contraction rate (Cross direction)			1.4	1.5	–	–	–
Thermal contraction rate (Thickness)			3.2	3.0	–	–	–
Breakdown strength	kV/mm	23℃50％RH	–	11.5	–	–	–
		105℃/48h	25.6	25.2	–	–	–
Volume resistivity	MΩ・cm	23℃50％RH	–	9.0×10⁴	–	–	–
		40℃90%RH/24h	–	1.4×10⁴	–	–	–
Arc resistance	Minutes	23℃50％RH	133	133	–	–	–
Water absorption rate	％	23℃Water absorption1hr	–	7.3	–	–	–
Moisture	％	105℃/48h	10or less	10or less	–	–	–
Flame retardance		UL94	HB	HB	–	–	–
Hot wire	Minutes	UL746A	15～30	–	–	–	–
High amp arc	Rounds	UL746A	120or more	–	–	–	–

Test items	unit	Test conditions	General Fibre	Heat and water resistant fiber		Flame retardant fiber
			HB-77N	K-57N	RK-76(S)GY	NF-77(N)GY	RNF-77GY
Thickness	mm	23℃50％RH	1.60	1.60	–	1.60	–
Paper weight in gsm	g/m²		2062	2083	–	2154	–
Density	g/cm³		1.29	1.30	–	1.35	–
Tensile strength (Machine direction)	Mpa		114	105	–	79	–
Tensile strength (Cross direction)			61	57	–	48	–
Bending resistance (Machine direction)	mm		11.8	–	–	–	–
Bending resistance (Cross direction)			5.0	–	–	–	–
Thermal contraction rate (Machine direction)	%	105℃/5hrs	0.7	0.7	–	0.6	–
Thermal contraction rate (Cross direction)			1.5	1.5	–	1.2	–
Thermal contraction rate (Thickness)			3.4	3.1	–	2.1	–
Breakdown strength	kV/mm	23℃50％RH	–	15.6	–	5.3	–
		105℃/48h	28.2	30.6	–	29.0	–
Volume resistivity	MΩ・cm	23℃50％RH	–	4.8×10⁵	–	3.4×10⁴	–
		40℃90%RH/24h	–	2.1×10³	–	1.7×10²	–
Arc resistance	Minutes	23℃50％RH	134	131	–	–	–
Water absorption rate	％	23℃Water absorption1hr	–	6.2	–	–	–
Moisture	％	105℃/48h	10or less	10or less	–	10or less	–
Flame retardance		UL94	HB	HB	–	V-0	–
Hot wire	Minutes	UL746A	15～30	–	–	120or more	–
High amp arc	Rounds	UL746A	120or more	–	–	120or more	–

Test items	unit	Test conditions	General Fibre	Heat and water resistant fiber		Flame retardant fiber
			HB-77N	K-57N	RK-76(S)GY	NF-77(N)GY	RNF-77GY
Thickness	mm	23℃50％RH	1.20	1.20	–	1.20	–
Paper weight in gsm	g/m²		1542	1524	–	1598	–
Density	g/cm³		1.29	1.28	–	1.36	–
Tensile strength (Machine direction)	Mpa		121	104	–	84	–
Tensile strength (Cross direction)			65	57	–	54	–
Bending resistance (Machine direction)	mm		7.9	16.1	–	34.6	–
Bending resistance (Cross direction)			3.6	11.1	–	31.1	–
Thermal contraction rate (Machine direction)	%	105℃/5hrs	0.7	0.8	–	0.6	–
Thermal contraction rate (Cross direction)			1.6	1.7	–	0.9	–
Thermal contraction rate (Thickness)			3.6	3.3	–	1.8	–
Breakdown strength	kV/mm	23℃50％RH	–	17.4	–	9.2	–
		105℃/24h	30.2	32.1	–	31.6	–
Volume resistivity	MΩ・cm	23℃50％RH	–	1.0×10⁶	–	4.9×10⁴	–
		40℃90%RH/24h	–	6.5×10³	–	4.5×10²	–
Arc resistance	Minutes	23℃50％RH	134	130	–	–	–
Water absorption rate	％	23℃Water absorption1hr	–	6.7	–	–	–
Moisture	％	105℃/24h	10or less	10or less	–	10or less	–
Flame retardance		UL94	HB	HB	–	V-0	–
Hot wire	Minutes	UL746A	7～15	–	–	120or more	–
High amp arc	Rounds	UL746A	120or less	–	–	120or less	–

Test items	unit	Test conditions	General Fibre	Heat and water resistant fiber		Flame retardant fiber
			HB-77N	K-57N	RK-76(S)GY	NF-77(N)GY	RNF-77GY
Thickness	mm	23℃50％RH	1.00	1.00	1.00	1.00	–
Paper weight in gsm	g/m²		1269	1275	1285	1285	–
Density	g/cm³		1.27	1.28	1.29	1.29	–
Tensile strength (Machine direction)	Mpa		120	102	121	82	–
Tensile strength (Cross direction)			64	56	65	46	–
Bending resistance (Machine direction)	mm		6.3	14.5	–	14.2	–
Bending resistance (Cross direction)			2.7	10.4	–	10.8	–
Thermal contraction rate (Machine direction)	%	105℃/5hrs	0.7	0.8	0.7	0.8	–
Thermal contraction rate (Cross direction)			1.7	1.8	1.6	1.5	–
Thermal contraction rate (Thickness)			3.7	3.5	3.1	2.6	–
Breakdown strength	kV/mm	23℃50％RH	–	18.5	24.5	9.1	–
		105℃/24h	32.7	33.7	33.4	34.9	–
Volume resistivity	MΩ・cm	23℃50％RH	–	1.8×10⁶	4.0×10⁶	3.2×10⁴	–
		40℃90%RH/24h	–	6.1×10³	3.8×10⁴	2.6×10²	–
Arc resistance	Minutes	23℃50％RH	135	130	–	–	–
Water absorption rate	％	23℃Water absorption1hr	–	6.9	2.5	–	–
Moisture	％	105℃/24h	10or less	10or less	10or less	10or less	–
Flame retardance		UL94	HB	HB	HB	V-0	–
Hot wire	Minutes	UL746A	7～15	–	–	120or more	–
High amp arc	Rounds	UL746A	120or more	–	–	120or more	–

Test items	unit	Test conditions	General Fibre	Heat and water resistant fiber		Flame retardant fiber
			HB-77N	K-57N	RK-76(S)GY	NF-77(N)GY	RNF-77GY
Thickness	mm	23℃50％RH	0.80	0.80	0.80	0.80	0.80
Paper weight in gsm	g/m²		989	995	1005	1017	1052
Density	g/cm³		1.24	1.24	1.26	1.27	1.31
Tensile strength (Machine direction)	Mpa		119	101	105	91	90
Tensile strength (Cross direction)			63	57	60	47	49
Bending resistance (Machine direction)	mm		4.8	16.6	–	8.6	8.9
Bending resistance (Cross direction)			1.8	13.1	–	4.1	8.2
Thermal contraction rate (Machine direction)	%	105℃/5hrs	0.7	0.8	0.7	0.7	0.6
Thermal contraction rate (Cross direction)			1.8	1.8	1.6	1.5	1.5
Thermal contraction rate (Thickness)			3.8	3.5	2.8	2.5	2.6
Breakdown strength	kV/mm	23℃50％RH	–	18.5	20.3	11.0	13
		105℃/24h	33.6	35.5	38.4	36.2	39.8
Volume resistivity	MΩ・cm	23℃50％RH	–	5.0×10⁶	1.6×10⁷	4.1×10⁴	2.0×10⁵
		40℃90%RH/24h	–	7.3×10³	8.3×10⁴	3.1×10²	4.8×10³
Arc resistance	Minutes	23℃50％RH	134	128	–	–	–
Water absorption rate	％	23℃Water absorption 1hr	–	7.2	1.6	–	–
Moisture	％	105℃/24h	10or less	10or less	10or less	10or less	10or less
Flame retardance		UL94	HB	HB	HB	V-0	V-0
Hot wire	Minutes	UL746A	7～15	–	–	120or more	30～60
High amp arc	Rounds	UL746A	120or more	–	–	120or more	120or more

Test items	unit	Test conditions	General Fibre	Heat and water resistant fiber		Flame retardant fiber
			HB-77N	K-57N	RK-76(S)GY	NF-77(N)GY	RNF-77GY
Thickness	mm	23℃50％RH	0.50	0.50	0.50	0.50	0.50
Paper weight in gsm	g/m²		606	609	620	624	646
Density	g/cm3		1.21	1.22	1.24	1.25	1.29
Tensile strength (Machine direction)	Mpa		114	103	114	90	98
Tensile strength (Cross direction)			60	58	58	47	55
Bending resistance (Machine direction)	mm		2.2	14.1	–	5.0	8.5
Bending resistance (Cross direction)			0.7	11.1	–	2.3	4.2
Thermal contraction rate (Machine direction)	%	105℃/5hrs	0.8	0.8	0.7	0.6	0.5
Thermal contraction rate (Cross direction)			1.9	1.7	1.6	1.5	1.2
Thermal contraction rate (Thickness)			3.8	3.7	3.6	2.7	2.8
Breakdown strength	kV/mm	23℃50％RH	–	19.0	29.1	8.3	17.7
		105℃/24h	37.3	37.2	36.5	37.9	37.3
Volume resistivity	MΩ・cm	23℃50％RH	–	8.4×10⁶	8.0×10⁶	8.9×10⁴	7.3×10⁵
		40℃90%RH/24h	–	1.4×10⁴	2.9×10⁴	4.1×10²	3.7×10³
Arc resistance	Minutes	23℃50％RH	130	123	–	–	–
Water absorption rate	％	23℃Water absorption1hr	–	7.3	4.2	–	–
Moisture	％	105℃/24h	10or less	10or less	10or less	10or less	10or less
Flame retardance		UL94	–	–	–	V-0	V-0
Hot wire	Minutes	UL746A	–	–	–	120or more	–
High amp arc	Rounds	UL746A	–	–	–	120or more	–

Test items	unit	Test conditions	General Fibre	Heat and water resistant fiber		Flame retardant fiber
			HB-77N	K-57N	RK-76(S)GY	NF-77(N)GY	RNF-77GY
Thickness	mm	23℃50％RH	0.25	–	–	0.25	0.25
Paper weight in gsm	g/m²		254	–	–	287	308
Density	g/cm3		1.06	–	–	1.15	1.22
Tensile strength (Machine direction)	Mpa		95	–	–	85	99
Tensile strength (Cross direction)			48	–	–	44	57
Bending resistance (Machine direction)	mm		0.5	–	–	2.2	6.5
Bending resistance (Cross direction)			0.1	–	–	0.7	3.5
Thermal contraction rate (Machine direction)	%	105℃/5hrs	0.8	–	–	0.6	0.4
Thermal contraction rate (Cross direction)			1.9	–	–	1.5	1.0
Thermal contraction rate (Thickness)			3.6	–	–	3.2	3.2
Breakdown strength	kV/mm	23℃50％RH	–	–	–	11.7	31.8
		105℃/24h	38.5	–	–	40.2	42.7
Volume resistivity	MΩ・cm	23℃50％RH	–	–	–	9.9×10⁴	8.3×10⁶
		40℃90%RH/24h	–	–	–	2.4×10³	2.8×10⁴
Arc resistance	Minutes	23℃50％RH	–	–	–	–	–
Water absorption rate	％	23℃Water absorption 1hr	–	–	–	–	–
Moisture	％	105℃/24h	10or less	–	–	10or less	10or less
Flame retardance		UL94	–	–	–	V-0	V-0
Hot wire	Minutes	UL746A	–	–	–	120or more	–
High amp arc	Rounds	UL746A	–	–	–	120or more	–

※ The above figures are reference values, not guaranteed values

※ Physical property value does not change by color, but electrical property value may become low by some color.