ACID RESISTANT CAPSULES

An acid resistant capsule comprises at least one hard capsule shell, said shell comprising: an enteric polymer having acid groups; a film-forming aid; and an alkaline material, wherein said alkaline material is present in an amount such that said carboxylic acid groups of said enteric polymer have a degree of ionization of less than 15%. 本发明公开了种耐酸胶囊，所述耐酸胶囊包括至少种硬胶囊壳，所述壳包含：肠溶聚合物，所述肠溶聚合物具有酸基团；成膜助剂；以及碱性物质，其中所述碱性物质以使得所述肠溶聚合物的所述羧酸基团具有小于15％的离子化程度的量存在。