| 摘要 |
The continuous preparation of caseinate comprises introducing non-soluble milk proteins into an extruder with two co-rotating and interpenetrating screws set on parallel axes inside a housing. The proteins are transported along the extruder and water and an alkaline reagent is added. Intense mixing under pressure at raised temperature triggers the reaction between protein and reagent. Non-soluble milk proteins are introduced into an extruder with two co-rotating and interpenetrating screws set on parallel axes inside a housing. The proteins are transported along the extruder and water and an alkaline reagent is added. Intense mixing under pressure at raised temperature triggers the reaction between protein and reagent. The mixture is further mixed, with a rise in temperature, and transported simultaneously. The mixture is subjected to high pressure, high shear mixing to complete the reaction and the mixture temperature is raised to fuse it into a viscous paste. The caseinate paste is degassed to adjust temperature and viscosity and transported and cooled. The paste is given a final mixing and cooled. and then transported while cooled to 70-95 deg C. The paste, with a 30-40% moisture content is extruded at the exit of the extruder into a sausage, formed into a thin sheet and cooled to below 20 deg C. The sheet is cut longitudinally into strips and then transversely into small pieces. An INDEPENDENT claim is included for an apparatus for the process comprising an extruder with two co-rotating and interpenetrating screws on parallel axes inside a long housing with cutting grooves determining successively a zone (A) for powder entry and transport; a zone (B) for transport with addition of water and reagent at end; a zone (C) for intensive pressure mixing; a zone for (D) mixture transport; a zone for (E) high pressure, high shear mixing; a zone (F) for degassing, transport and cooling; a zone (G) for mixing and cooling; a zone (H) for transport and thermal exchange and an extrusion nozzle, a means of forming the paste into a sheet, longitudinal and transverse cutters.
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