Views: 0 Author: Site Editor Publish Time: 2026-07-20 Origin: Site
In the field of starch deep processing, pregelatinized starch and modified starch, as important functional starch products, are widely used in food, papermaking, textile, pharmaceutical, building materials and other industries, mainly playing the roles of thickening, stabilizing, binding and film forming.
As market demands for starch product performance, production efficiency, and environmental protection continue to rise, traditional production processes are facing increasing challenges in terms of energy consumption, environmental protection, and continuous production. Continuous production processes based on twin-screw extrusion puffing technology, with their advantages of high efficiency, energy saving, and environmental friendliness, have become a new focus for starch processing enterprises.
Shandong Litian Co., Ltd., drawing on years of experience in starch thermomechanical processing, introduces the application of twin-screw extrusion technology in the production of pregelatinized starch and modified starch.
Pregelatinized starch is a cold-water soluble starch product made by heating, gelatinizing, drying, and pulverizing native starch. It is widely used in food, convenience food, feed, and pharmaceutical industries.
Traditional drum drying equipment is simple, but it has problems such as high energy consumption, difficulty in controlling product color, and insufficient production consistency.
Pregelatinized starch is produced using a twin-screw extruder, which allows the starch to undergo mixing, heating, shearing, and gelatinization within the extruder barrel, followed by drying and pulverization to obtain the finished product. Its main advantages include:
· Stable gelatinization effect : The material is heated evenly, and the degree of gelatinization is easy to control;
· Continuous production : The production process is highly automated and suitable for large-scale production;
· Low energy consumption : It utilizes mechanical energy to convert it into thermal energy, thereby improving energy efficiency;
· Excellent product quality : short heating time, light product color, and stable performance.
Modified starch is a functional product obtained by altering the properties of natural starch through physical, chemical, or enzymatic methods. It includes acid-modified starch, oxidized starch, cross-linked starch, esterified starch, etc.
Traditional wet-process modified starch production requires a large amount of water resources and involves multiple steps such as reaction, washing, neutralization, and drying, resulting in a long production cycle.
The production of dry or semi-dry modified starch using twin-screw extrusion technology can promote starch modification reactions through high temperature, high pressure, and strong shear, and has the following characteristics:
· Reduce water consumption and lower the pressure on wastewater treatment;
· Shorten reaction time and improve production efficiency;
· It enables continuous production and is suitable for industrial applications.
It should be noted that different types of modified starch have different requirements for processing conditions, and companies should choose the appropriate production method according to the performance requirements of their products.
A complete starch deep processing production line typically includes:
According to the formula requirements, starch, water and other additives are precisely measured and uniformly mixed to provide stable materials for subsequent processing.
The twin-screw extruder is the core equipment of the entire production line. It achieves starch gelatinization or modification reaction by precisely controlling temperature, pressure, and shear strength.
Select appropriate drying equipment based on product characteristics to reduce material moisture and ensure product stability.
The dried material is crushed to the target particle size and then graded and screened to meet different application requirements.
When selecting equipment for the production of pregelatinized starch or modified starch, the following points need to be considered:
1. Process compatibility:
Different raw materials (corn starch, tapioca starch, potato starch, etc.) behave differently during extrusion, and process testing should be conducted in advance.
2. A segmented temperature control system with precise and
stable temperature control can ensure the gelatinization and modification of starch, and improve product consistency.
3. The screw assembly is flexible and
the adjustable screw structure can meet the requirements of different products for shear strength and processing conditions.
4. Rationality of Supporting Equipment:
Drying, crushing, and screening equipment need to be rationally configured according to output and product characteristics.
Shandong Litian Machinery Co., Ltd. focuses on the research and development and manufacturing of food and starch processing equipment, and can provide overall solutions for pregelatinized starch and modified starch production lines according to customer needs.
Our twin-screw extrusion puffing equipment supports:
· Segmented precise temperature control;
· Customized screw assembly;
· Mold structure optimization;
· Different production capacity plans are designed.
By combining supporting drying, crushing and screening equipment, we provide customers with stable and efficient starch deep processing production solutions.
If you are planning a pregelatinized starch or modified starch project, please contact us for professional equipment configuration and process solutions.
