magnetic ruber ゴムじく

product description

Rubber magnetism(ゴムじく‍) is a kind of functional composite material, which is composed of barium and strontium ferrite magnetic powder and rubber or plastic by injection and moulding.

Material characteristics: low hardness, good plasticity, is a soft and elastic magnet. Therefore, it has good processing performance and can be easily punched, cut, punched and winded. The dimension and shape have large degree of freedom and can be easily processed into various shapes.

The motor magnetic strip products are mainly used in micro-motors of cameras, cameras, tape recorders, VCD, walkman, computers and other equipment. Rubber magnetic products are widely used in refrigerator door seals, drinking water machine door seals, ordinary door suction, magnetic bookboards, toys, stationery, teaching, bathroom seals, relays, switches and so on.

rubber magnetometer

category	brand name	remanence	coercivity		hcj		maximum magnetic energy product
		Br	Hcb		Hcj		（ BH ） max
		mT	kA/m	Oe	kA/m	Oe	kJ/m3	MGOe
同性挤出	EM-7	≥170	≥104	≥1300	≥155	≥1950	≥ 5.18	≥0.65
同性压延	EM-7J	≥185	≥112	≥1400	≥147	≥1850	≥5.18	≥0.8
半异性挤出	EM-9	≥180	≥115	≥1450	≥167	≥2100	≥5.97	≥0.75
半异性压延	EM-9J	≥200	≥119	≥1500	≥151	≥1900	≥6.77	≥0.85
异性挤出	EM-12	≥210	≥143	≥1800	≥199	≥2550	≥8.76	≥1.1
异性压延	EM-12J	≥245	≥167	≥2100	≥199	≥2500	≥11.15	≥1.4
高性能异性挤出	EM-13	≥225	≥155	≥1950	≥223	≥3000	≥9.95	≥1.25
高性能异性压延	EM-13J	≥260	≥179	≥2250	≥207	≥2600	≥13.14	≥1.65

rubber magnetophysical performance table

参数	EM-7	EM-9	EM-12	EM-13
拉伸强度 (mPa)	>2.0	>2.3	>3.0	>2.8
延伸率 (%)	20	30	30	18
硬度 (shore D)	30-40	30-45	30-50	30-45
密度 (g/cm 3 )	3.65-3.75	3.65-3.75	3.70-3.80	3.70-3.80
温度范围 ( ℃ )	-40~100	-40~100	-40~90	-40~90

gauss attraction on calendered sheet surface

THICKNESS (mm)			0.5	0.7	1	1.2	1.5	1.8	2	2.2	2.5
EM-7	P=2.5	g/cm 2	10	12
	P=2.5	Gs	260	340
	P=3.0	g/cm 2			20	23
	P=3.0	Gs	250	350	440	540
	P=4.5	g/cm 2					38	42	45	48	52
	P=4.5	Gs					540	580	620	640	660
EM-9	P=2.5	g/cm 2	11	14
	P=2.5	Gs	290	360
	P=3.0	g/cm 2			22	26
	P=3.0	Gs	290	370	460	500
	P=4.5	g/cm 2					52	58	61	63	67
	P=4.5	Gs					560	600	620	655	670
EM-12	P=2.5	g/cm 2	12	16
	P=2.5	Gs	320	390
	P=3.0	g/cm 2			37	42
	P=3.0	Gs	320	400	500	530
	P=4.5	g/cm 2					60	66	79	83	90
	P=4.5	Gs					580	620	660	680	720
EM-13	P=2.5	g/cm 2	13	18.5
	P=2.5	Gs	340	390
	P=3.0	g/cm 2			39	45
	P=3.0	Gs	340	420	500	540
	P=4.5	g/cm 2					65	68	82	85	93
	P=4.5	Gs					610	668	682	710	740

REMARK:"P" indicates "Pitch".

extrusion bar attraction

profile size (mm)	2.7x8	3.0x8.8	3.0x9.0	3.3x9.0	4.0x8.0	4.0x8.4	5.0x10.0
g/cm >=	25	29	30	32	33	35	39

ゴムじく