Film-forming property of soy protein isolate

Filming of soy protein isolate were studied through single-factor experiments and orthogonal experiment. The results showed that there were significant effects on properties of the soy protein isolate films in different soy protein isolate concentration, plasticizer(glycerin), reducing agents(Na₂SO₃), crosslinking agens(TG); The optimum filming technology was that soy protein isolate was 5.0%, glycerin was 1.5%, Na₂SO₃ was 0.1%, TG was 0.2%. The orders of soy protein isolate films to the effects on properties, first was soy protein isolate concentration, second was the concentration of glycerin, the last was the concentration of Na₂SO₃ and TG.