Gelatin capsules are capsules made of gelatin as the main material, and those that are not filled with drugs are called hollow capsules, which are used to fill drugs. The drug is directly wrapped in a soft capsule by dropping, steel or rotational molding. In order to improve the properties of the capsule and give special functions, various additives can be added, such as plasticizers (glycerin, sorbitol, etc.), opacifiers (titanium dioxide, barium sulfate, etc.), sustained-release and enteric-coated excipients (cellulose acetate, shellac, antelopropyl methylcellulose, phthalate cool, methacrylic acid monomethyl oleoic acid methyl cool copolymer, etc.), epiactive agents (Tween, sodium lauryl sulfate, etc.), as well as fungicides, flavoring agents and pigments.
