| 摘要 |
PROBLEM TO BE SOLVED: To provide an enteric coating technique which can carry out an enteric coating treatment without using an organic solvent and further without clogging a spray gun and does not need the increase in the cost of the device. SOLUTION: This spray gun is characterized by having one nozzle with which an enteric polymer dispersion and/or an enteric polymer solution can singly be carried, extruded and sprayed, and further having another nozzle with which a plasticizer solution can singly be carried, extruded and sprayed. Thus, the enteric polymer dispersion and/or the enteric polymer solution and the plasticizer solution can simultaneously and separately be carried, extruded and sprayed from the nozzles, mixed in the sprayed state, and then coated.
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