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Development of a continuous process to make casein films
- Kozempel, M., Tomasula, P.M.
- Journal of agricultural and food chemistry 2004 v.52 no.5 pp. 1190-1195
- caseinates, glycerol, plasticizers, films (materials), coatings, continuous systems, tensile strength, dimensions, mechanical properties, thickness
- A semicontinuous pilot plant process was developed to make films from calcium caseinate plasticized with glycerol. Calcium caseinate/glycerol solutions were wetted and spread on polyethylene or Mylar belts and were readily removed after forming films. A Meier rod was used to spread the solution onto the belt. Feed rates were 3.3 and 5 g/cm. The resulting films using the polyethylene belt had a tensile strength of 5 MPa and 30% elongation with thickness of 0.14 mm. When the glycerol concentration was adjusted, the process produced films with properties similar to those previously reported for a batch process. It is anticipated that this process will apply to other proteins.