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China, Chinese Binder Application Modified Potato Starch Processing Machines for Corrugated Paper Case1 Industrial Products Supplier Manufacturer Details, price list catalog:
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Grain Products Processing MachineryModified Starch MachineModified Starch Production Line
Jinan Sunward Machinery Co., Ltd.
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Product Description Product Description modified starch prodction line modified starch machine modified starch extruder Using a **twin-screw extruder** to produce **modified starch** involves mechanical, thermal, and chemical modification of native starch. The process is efficient, continuous, and allows for precise control over reaction conditions. Below is a step-by-step guide: **1. Selection of Raw Materials** **Native Starch**: Corn, potato, tapioca, wheat, or rice starch.- **Modification Agents** (depending on desired properties): - **Chemical modifiers**: Acids, alkalis, oxidants (e.g., hydrogen peroxide), cross-linkers (e.g., sodium trimetaphosphate), or esters (e.g., acetic anhydride). - **Enzymes**: For enzymatic modification (e.g., α-amylase). - **Plasticizers**: Glycerol, water (for thermoplastic starch).--- **2. Pre-Treatment of Starch (Optional)**- **Drying**: Reduce moisture content if too high (typically to ~10-20%).- **Pre-mixing**: Blend starch with modifiers (e.g., acids, alkalis, or cross-linkers) before feeding into the extruder.---**3. Twin-Screw Extrusion Process** **Extruder Setup**- **Screw Configuration**: Use a combination of **kneading blocks, reverse elements, and conveying screws** to ensure proper mixing, shearing, and reaction.- **Barrel Temperature Zones**: - **Zone 1 (Feed)**: 25-50°C (pre-mixing & feeding). - **Zone 2-3 (Melting/Kneading)**: 70-120°C (gelatinization). - **Zone 4-5 (Reaction)**: 90-180°C (chemical modification). - **Zone 6 (Cooling/Die)**: 50-100°C (stabilization). - **Screw Speed**: 100-500 RPM (adjust based on shear requirement).- **Residence Time**: 1-5 minutes (depends on modification type). **Modification Mechanisms**- **Thermo-Mechanical Gelatinization**: Starch granules are disrupted under heat and shear.- **Chemical Reaction**: Modifiers react with starch (e.g., esterification, cross-linking, oxidation).- **Enzymatic Hydrolysis** (if enzymes are used, keep temperature <60°C).---**4. Post-Extrusion Processing**- **Cooling & Drying**: Extruded starch may need drying to stabilize moisture.- **Grinding**: Pelletized or flaked starch can be milled into powder.- **Neutralization/Washing** (if needed): For chemical-modified starch (e.g., acid-thinned starch may require pH adjustment).---**5. Types of Modified Starch Produced**| **Modification Type** | **Agents Used** | **Extrusion Conditions** | **Properties Achieved** ||-----------------------|----------------|--------------------------|-------------------------|| **Pre-gelatinized** | Water, heat | 80-120°C, high shear | Cold-water solubility || **Cross-linked** | STMP, POCl | 100-150°C, alkaline pH | Improved heat stability || **Oxidized** | HO, NaOCl | 70-100°C | Lower viscosity, clarity || **Acetylated** | Acetic anhydride | 100-140°C | Improved film-forming || **Thermoplastic (TPS)** | Glycerol/water | 120-180°C | Biodegradable plastic |---**6. Key Process Parameters to Control**- **Moisture Content** (10-30% for gelatinization).- **Temperature Profile** (depends on starch type & modification).- **Screw Speed & Shear** (affects degradation).- **Residence Time** (longer for chemical reactions).- **pH** (if using chemical modifiers).---**7. Applications of Extruded Modified Starch**- **Food Industry**: Thickeners, stabilizers, resistant starch.- **Biodegradable Plastics**: Thermoplastic starch (TPS) for packaging.- **Pharmaceuticals**: Binder, disintegrant.- **Textiles & Adhesives**: Modified starches for sizing agents.--- **Conclusion**Twin-screw extrusion is a **versatile, scalable, and eco-friendly** method for starch modification. By adjusting screw design, temperature, and additives, you can produce various modified starches with tailored properties for different industries. Detailed Photos The starch is subjected to a wetting treatment so that its moisture content is about 20% and is introduced into an extruder. The temperature of the heated part of the extruder is as high as 120 ° C to 200 ° C and the pressure can be 3-10MPa.The starch is pushed forward by the screw in the extruder and released through the die hole of a few millimeters. Due to the high pressure difference between the inside of the extruder and the outside atmosphere, the starch is instantly expanded and dried to achieve the pre-gelatinization effect. The screw extrusion process is characterized by continuous production, low energy consumption, low investment, and simple equipment.ModelInstalled PowerProduction CapacityDimensionTSE6577KW100KG/H-150KG/H19000*1300*2200mmTSE70108KW200KG/H-250KG/H21000*1300*2200mmTSE85120KW300KG/H-500KG/H30000*1500*2600mmTSE90150KW500KG/H-1000KG/H32000*1500*2600mm
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