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在各种肠溶包衣中,使用虫胶包衣者比较广泛。在虫胶包衣之后,虽出现过不少种较新型的肠溶衣,但并没有完全取代它的用途,在国内肠溶制剂的生产上,用虫胶包衣者为多数。一、虫胶的来源和商品虫胶(Resina Lacca)是亚洲东部产的一种天然树脂。当Coccidae科昆虫Laccife Lacca寄生在某些种树的树干上时,树液被昆虫吸入,在虫体内即转变成树脂状物,再由虫体表面的细孔分泌出来,最后则整个虫体被树脂包埋,因此而得名为虫胶。
In a variety of enteric coatings, the use of shellac coating more widely. After the shellac coating, although there have been many newer enteric coatings, but it does not completely replace its use, in the production of enteric preparations, the majority of shellac coating. First, the source of shellac and commodity shellac (Resina Lacca) is a natural resin produced in eastern Asia. When the Coccidae insect Laccife Lacca parasitic on the trunk of some kinds of trees, the sap is inhaled insects, which is transformed into resin-like body, and then secreted by the pores of the surface of the worm body, and finally the entire worm was Resin embedded, hence the name shellac.