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Pharmaceutical Manufacturing Handbook: Production and

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988 TABLET DESIGN<br />

Drug release (%)<br />

120<br />

100<br />

80<br />

60<br />

40<br />

20<br />

FIGURE 8 Enteric fi lm coating of tablets, acetylsalicylic acid (organic solution): paddle<br />

100 rpm, 37 ° C; 0 – 2 h: 0.08 M HCl, 2 h+: phosphate buffer Ph 6.8.<br />

Component<br />

Kollicoat MAE 100 P<br />

Triethyl citrate<br />

Ethanol<br />

Isopropanol/Wasser (70/30)<br />

Total<br />

Polymer applied<br />

Content of polymer<br />

Parts by Weight [g]<br />

No. 1 No. 2<br />

344.52<br />

344.52<br />

34.45<br />

34.45<br />

4214.60 —<br />

—<br />

4214.60<br />

4593.57 4593.57<br />

10.0 mg/cm 2<br />

7.5%<br />

Preparation of Spray Suspension Kollicoat MAE 100P <strong>and</strong> triethyl citrate were<br />

stirred into the solvent until complete dissolution.<br />

Process Parameters<br />

Ethanol<br />

Isopropanol/wasser<br />

(70/30)<br />

0<br />

0 50 100<br />

Time (min)<br />

150 200<br />

Coating pan 24 Accela Cota<br />

Size of batch 5 kg<br />

Inlet air temperature<br />

50 ° C<br />

Outlet air temperature<br />

35 – 38 ° C<br />

Product temperature<br />

30 – 35 ° C<br />

Inlet air rate 70 m<br />

Outlet air rate 140 m<br />

Spraying pressure 2.0 bars<br />

Nozzle diameter<br />

1.0 mm<br />

Rate of spraying 30 g/min<br />

Time of spraying 2.5 h<br />

Preheating<br />

3 min<br />

Final drying 5 min<br />

Dissolution: (See Figure 8 ). Dissolution was done according to USP monograph<br />

“ Aspirin Delayed - Release Tablets. ”

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