ACHIEVE MAGNETIC PERFORMANCE IN PLASTIC BONDED MAGNETS THROUGH INJECTION MOLDING

Injection Molded Magnets Finished Components

Injection Molding Process

Ferrite Grades

NdFeB Grades

SmFeN Grades

Specification of hard-ferrite bonded magnetic compounds

Grade	Br Residual Flux Density		HcB Coercive Force		HcJ Intrinsic Coercive Force		(BH)max Maximum Energy Product		Mold density	Melt Flow Rate	IZOD Impact Strength	Tensile Strength	Flexural Strength	Composition
	mT	Gs	kA/m	Oe	kA/m	Oe	kJ/m3	MGOe	g/cm3	g/10min	kJ/m2	MPa	MPa	Ferrite+PA6
FA11	213	2130	162	2040	279	3500	8.8	1.10	3.03	100	50	85	160
FA15	245	2450	183	2300	251	3150	11.9	1.50	3.32	80	35	85	165
FA19	284	2840	195	2450	235	2950	15.6	1.96	3.60	200	19	90	170
FA20T	293	2930	193	2420	223	2800	16.6	2.08	3.70	200	15	85	160
FA22T	305	3050	191	2400	229	2870	18.1	2.27	3.85	80	11	80	145

FB12	227	2270	171	2150	279	3500	10.0	1.26	3.10	150	40	60	120	Ferrite+PA12
FB16	258	2580	193	2430	255	3200	13.1	1.64	3.30	110	35	62	125
FB19R	283	2830	205	2570	255	3200	15.5	1.95	3.58	100	26	56	110
FB20RT	294	2940	203	2550	247	3100	16.7	2.10	3.70	90	22	52	100
FB22AN	303	3030	187	2350	215	2700	17.8	2.23	3.80	100	18	50	95
FB23R	306	3060	209	2620	253	3180	18.0	2.26	3.83	50	15	50	93

FC15	250	2500	179	2250	247	3100	12.1	1.52	3.44	270	9	55	110	Ferrite+PPS
FC16B	256	2560	178	2230	227	2850	12.9	1.62	3.54	260	9	55	110
FC17	267	2670	175	2220	219	2750	13.7	1.72	3.60	220	8	50	100
FC18	272	2720	171	2150	215	2700	14.3	1.80	3.66	180	7	45	105

MFR Test Condition: FA/FB series(270℃, 10kg); FC series(310℃, 10kg)

Specification of bonded neodymium magnetic compounds

Grade	Br Residual Flux Density		HcB Coercive Force		HcJ Intrinsic Coercive Force		(BH)max Maximum Energy Product		Mold density	Melt Flow Rate	IZOD Impact Strength	Tensile Strength	Flexural Strength	Composition
	mT	Gs	kA/m	Oe	kA/m	Oe	kJ/m3	MGOe	g/cm3	g/10min	kJ/m2	MPa	MPa	NdFeB+PA12
NB30	403	4030	242	3040	406	5100	24.9	3.13	4.87	490	19	67	120
NB30L1	386	3860	261	3280	654	8210	25.3	3.18	4.26	1200	15	61	107
NB40	454	4540	301	3780	669	8400	34.2	4.30	4.51	790	17	62	111
NB50	501	5010	315	3960	641	8050	40.0	5.02	4.90	610	18	66	118
NB60	562	5620	354	4450	684	8590	51.0	6.41	5.11	420	16	67	121
NB70	602	6020	368	4620	663	8330	57.2	7.19	5.34	1010	8	54	91
NB80	640	6400	379	4760	632	7940	63.8	8.02	5.64	680	9	62	105

NC35	414	4140	276	3470	592	7430	28.6	3.59	4.57	880	7	55	104	NdFeB+PPS
NC40H-PN	450	4500	320	4020	930	11680	35.4	4.45	4.64	640	10	68	126
NC55A	520	5200	357	4480	917	11520	46.2	5.80	5.05	310	9	61	126
NC60A	532	5320	363	4560	858	10780	48.1	6.04	5.10	320	9	61	127
NC65	574	5740	372	4670	693	8700	53.7	6.74	5.21	110	8	48	108
NC65H2	566	5660	379	4760	826	10370	53.5	6.72	5.29	370	7	57	106

NFB30	408	4080	234	2940	400	5030	26.0	3.27	4.66	400	16	56	114	Ferrite+NdFeB+PA12
NFC30	391	3910	240	3010	457	5740	26.7	3.35	4.42	210	9	56	124	Ferrite+NdFeB+PPS

HNB120a	736	7360	488	6130	973	12220	95.9	12.05	4.75	600	13	50	85	Anisotropic NdFeB+PA12
HNB140a	821	8210	501	6290	1003	12600	113.0	14.20	5.15	400	7	47	83	Anisotropic NdFeB+PA12

HNC80a	620	6200	407	5110	971	12200	66.1	8.3	4.35	500	12	47	100	Anistropic NdFeB+PPS
HNC90a	643	6430	421	5290	963	12100	72.4	9.1	4.50	300	10	45	95
HNC100a	670	6700	454	5700	947	11900	80.4	10.1	4.70	200	9	44	95

MFR Test Condition:NB/NFB/HNB series (270C, 10kg); NC/NFC/HNC series(310℃, 10kg).

Specification of Sm-Fe-N series bonded magnetic compounds

Grade	Br Residual Flux Density		HcB Coercive Force		HcJ Intrinsic Coercive Force		(BH)max Maximum Energy Product		Mold density	Melt Flow Rate	IZOD Impact Strength	Tensile Strength	Flexural Strength	Composition
	mT	Gs	kA/m	Oe	kA/m	Oe	kJ/m3	MGOe	g/cm3	g/10min	kJ/m2	MPa	MPa
HSFD30b	373	3730	204	2560	384	4820	26.3	3.30	3.80	70	15	47	80	Ferrite+SmFeN+ PA11/PA12
HSFD40b	440	4400	243	3050	500	6280	34.2	4.30	3.90	70	14	47	77
HSFD50b	490	4900	282	3540	521	6550	41.8	5.25	4.00	80	14	45	78
HSFD60b	539	5390	321	4030	541	6800	50.7	6.37	4.05	80	14	45	79
HSFD70b	569	5690	349	4380	551	6920	58.1	7.30	4.10	80	14	44	75

HSD80b	603	6030	403	5060	621	7800	66.8	8.39	4.15	70	18	47	79	SmFeN+ PA11/PA12
HSD90b	639	6390	406	5100	613	7700	72.8	9.15	4.27	60	15	45	77
HSD100b	653	6530	407	5110	589	7400	78.1	9.81	4.35	60	13	44	79
HSD110b	685	6850	426	5350	569	7150	86.4	10.85	4.53	60	13	41	71

HSND100a	689	6890	408	5130	701	8810	82.0	10.30	4.45	150	13	47	99	Anisotropic NdFeB+ SmFeN+ PA11/PA12
HSND120a	781	7810	454	5700	812	10200	99.3	12.47	4.95	100	12	50	91
HSND140a	820	8200	496	6230	876	11000	110.6	13.90	5.15	300	10	52	86
HSND150a	840	8400	501	6290	836	10500	118.2	14.85	5.28	230	9	50	83

MFR Test Condition: HSFD/HSD series(240°C,10kg); HSND series(270°C,10kg);

Injection Molded Technology by Chase

We support customers by optimizing processing parameters based on specific material characteristics to achieve the best balance of magnetic and mechanical performance in plastic bonded magnets. Through close technical collaboration, we work with customers to analyze manufacturing challenges and continuously improve process stability and product consistency.

Different plastic bonded magnet systems, especially those based on neodymium magnets, place distinct demands on both material formulation and mold design. Due to the high loading of magnetic powder within the polymer matrix, bonded magnetic composites exhibit significantly lower flowability than conventional plastic compounds. As the magnetic powder content increases, material toughness decreases, increasing the risk of common injection molding defects such as incomplete cavity filling, part cracking, and unstable magnetic properties.

To address these issues, we provide application-specific material and design solutions, including improving melt flow and toughness, reducing friction between the melt and the mold surface, and minimizing internal stress within the molded parts. With extensive project experience and a comprehensive technical solution portfolio in injection-molded magnetic compounds, Chase Technology enables customers to overcome production and design challenges associated with plastic bonded neodymium magnets, ensuring reliable performance and manufacturability at scale.