Magnetic Stripe Compounds
Magnetic stripe compounds are compatible with different kinds of composite materials, such as nylon, resin, polyvinyl chloride and rubber, etc.. Due to the large particle size, such powders have a high filling capacity. They can be used to make different magnets by extrusion or infecting molding. Our plant's strict quality control system ensures that the quality is stable and consistent.
Dexing produces different kinds of magnetic powder for magnetic strips used for refrigerator door gaskets, which feature purely, low water content, and stable magnetic properties. So far, Dexing has supplied the magnetic powders for Haier, Panasonic and LG.
|
P/N |
Material |
Find Powder (µm) |
Moisture % |
Magnetic Properties |
Testing Mothed |
|||
|
Br |
bHc |
iHc |
(BH)max |
|||||
|
mT |
(kA/m) |
(kA/m) |
(KJ/m3) |
|||||
|
DXF-2D |
BaFe12O19 |
2.0±0.4 |
≤0.5 |
145±5 |
95±16 |
195±25 |
3.5±0.4 |
Green Piece |
|
DXF-2SH |
SrFe12O19 |
1.7±0.3 |
≤0.5 |
145±5 |
95±16 |
195±12 |
3.5±0.4 |
Green Piece |
|
225±10 |
135±16 |
172±12 |
9.0±1.0 |
Calendering |
||||
|
DXF-3D |
SrFe12O19 |
1.80±0.20 |
≤0.5 |
170±5 |
115±6 |
219±12 |
5.2±0.5 |
Green Piece |
|
290±5 |
203±12 |
235±16 |
15.9±0.8 |
Injection |
||||
|
DXF-4D |
SrFe12O19 |
1.2±0.1 |
≤0.5 |
157±5 |
110±5 |
≥240 |
4.6±0.3 |
Green Piece |
|
264±6 |
185±5 |
240±15 |
13.0±0.8 |
Calendering |
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|
DXF-4DH |
SrFe12O19 |
1.20±0.15 |
≤0.5 |
157±5 |
110±5 |
306±12 |
4.6±0.3 |
Green Piece |
|
262±5 |
185±5 |
345±25 |
13.0±0.8 |
Calendering |
||||
|
DXF-4D2 |
SrFe12O19 |
1.2±0.1 |
≤0.5 |
160±5 |
110±5 |
252±12 |
4.7±0.3 |
Green Piece |
|
260±5 |
180±5 |
235±25 |
13.0±0.8 |
Calendering |
||||
|
DXF-4D3 |
SrFe12O19 |
1.20±0.15 |
≤0.5 |
155±5 |
110±5 |
277±12 |
4.5±0.3 |
Green Piece |
|
257±5 |
183±5 |
257±25 |
12.8±0.8 |
Calendering |
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Test result of magnetic strip used for refrigerator gaskets
Characteristics for extruded strip
(measured on finished extruded strip dim. 2.4 x 9 mm with insulation)
|
Properties |
|
Values |
|||
| 2.4 x 9 (mm) | 2.4 x 9 (mm) | 2.4 x 9 (mm) | |||
| 1. | Hardness Shore | Hs (A) | 96 | 96.2 | 96.6 |
| 2. | Density | g/cm3 | 3.55 | 3.76 | 3.57 |
| 3. | Force of cohesion (with 0.5mm air gap) |
g/cm | 72.4 | 272.4 | 72.4 |
| 4. | Max. surface magnetic induction | mT | 75 | 71 | 74 |
| 5. | Tear resistance | kg/cm2 | 72 | 76 | 68 |
| 6. | Crack elongation rate | % | 124 | 107 | 87 |
| 7. | Temp. coefficient of surface magnetic force, continuously working for 240 hours at 80°C | % | 1.5 | 0.7 | 0.3 |
| 8. | Temp. coefficient of surface magnetic force, continuously working for 240 hours at -20°C | 1.4 | 1.3 | 0.3> | |
| 9. | Flexural strength (twist around a stick 16mm) | Passed | Passed | Passed | |
| 10. | Torsion characteristics: when torsion is around 360 | Passed | Passed | Passed | |
Color of magnetic compound:
White, black, gray, light yellow, light black, porcelain white, etc, anyway, specific hardness, and color of PVC compound could be made as per customers's demands.
Storage of magnetic compound:
In general, long storage times in a humid and hot climate may result in the brittleness of the magnetic strip. The storage time should not exceed: 12 months at a storage temperature of up to 25°C /50% relative humidity, and 6 months at a storage temperature of up to 40°C /50% relative humidity.
In case of higher temperatures and humidities, the storage time should be reduced accordingly. The cartons should remain sealed during storage in order to avoid possible hardening of the magnetic strip caused by long-term exposure to light. Permissible stacking height for stationary storage: tree pallets on top of each other.
