With the soybean protein isolate(SPI), carboxymethyl cellulose(CMC)and pea starch(PS)as film-forming material, and with glycerin, sorbitol, polyethylene glycol(peg), Tween as theplasticizers, the three-element compound protein membrane SPI/CMC/PS was prepared with tape-casting, and the influence of several plasticizers on the properties of the composite wax was studied.The infrared spectra was used to characterize the composite film of various kinds of plasticizers.The experi-mental results showed that the ...