Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1975-05-22
1977-05-31
Hoffman, James R.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264DIG37, 427 2, B29C 1300, B29C 1304
Patent
active
040269868
ABSTRACT:
Capsule shells for pharmaceutical use are presently made from gelatin. Use of water-soluble starch ethers instead of gelatin facilitates the production of the shells and produces improved shells. Preferred material is 2-hydroxypropyl starch made from high-amylose starch and having about 0.3 to 2.5 hydroxypropyl groups per glucose unit of the starch.
REFERENCES:
patent: 2299039 (1942-10-01), Scherer
patent: 3378546 (1968-04-01), Tsuzuki
patent: 3493407 (1970-02-01), Greminger et al.
patent: 3617588 (1971-11-01), Langman
Cheng Wen-Jiu
Christen Jimmie Duane
Hoffman James R.
Kellom David B.
The Dow Chemical Company
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