CASE NO: 136
| OBJECT: |
Iron Oxide dispersion for magnetic tape coating. AB mixer used for three functions:
1. Disperse resin into solvent.
2. Premix iron oxide into above prior to grinding in sandmill.
3. Final dispersion of ground premix and solvent prior to coating
(let down).
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PROBLEM: |
Magnetic coatings flocculate after let down. |
|
RESULT: |
Successful in all of the above. |
|
AB MIXER: |
One C-1 mixer, 33" immersion, 5 HP explosion proof motor. |
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EQUIPMENT REPLACED: |
Gifford-Wood |
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