Pectin film compositions
View Patent ↗The invention concerns, film-forming compositions containing pectin, at least one additional film-forming polymer and a setting system for use in pharmaceutical, veterinary, food, cosmetic or other products like films for wrapping food, aspics or jellies, preferably for predosed formulations like soft or hard capsules, as well as aqueous solutions of the composition for the manufacturing of said products.
1. An enteric capsule film composition consisting essentially:
a) 5–60 weight % pectin;
b) 40–95 weight % of a second film-forming polymer selected from the group consisting of gelatin; pullulan; polyvinyl alcohol; hydroxypropylated starch, hydroxyethylated starch; hydroxypropyl methylcellulose, hydroxypropyl cellulose, methylcellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose; or mixtures thereof; and
c) a setting system comprising the pectin of part (a) in combination with
(i) 0.04–2 weight % of a salt comprising a divalent cation; or
(ii) 0.2–8 weight % of a polysaccharide selected from the group consisting
of carrageenan, gellan and mixtures thereof;
wherein the capsule can resist dissolution for at least 2 hours at a PH of 1.2.
2. A capsule according to claim 1 wherein the content of pectin is 10–40%, and that of the second film-forming polymer is 50 to 85%.
3. A capsule according to claim 1 wherein the divalent cationic salts are selected from the group consisting of magnesium and calcium salts.
4. A capsule according to claim 1 additionally comprising at least one additional ingredient selected from the group consisting of coloring agents, plasticizers and flavoring agents.
5. A method for making a capsule of claim 1 wherein the method is a dip molding process using a solution at a temperature of above 50 degrees C.
6. A capsule as claimed in claim 1 wherein the second film-forming polymer is gelatin.
7. A capsule as claimed in claim 1 wherein the second film-forming polymer is hydroxypropyl methylcellulose.
8. A capsule as claimed in claim 1 wherein the second film-forming polymer is pullulan.