HEC from the manufacturer with 20 years experience, is used as a ... types of cellulosederivatives known as cellulose ethers,specifically Methyl Cellulose(MC), Hydroxy Propyl Methyl Cellulose(HPMC), Hydroxyethyl Cellulose(HEC), and Hydroxy Ethyl MethylCellulose ... otherfunctions. .How it functions: Uponeachcellulose ether molecule are the cellulose chain, and the ethergroup,such as the methoxy, the ...