Pregelatinized flours: Advanced technological functionality in Clean Label concept

Pregelatinized flours are produced through a controlled thermal and moisture treatment process of plant raw materials. The key physicochemical phenomenon occurring during this process is the gelatinization of native starch. Under the influence of temperature and the presence of water, hydrogen bonds within the starch granules are disrupted, resulting in the irreversible destruction of their crystalline structure. 

Consequently, the starch becomes "pre-cooked". From a rheological perspective, the most critical characteristic of such modified flour is its ability to swell instantly and bind water at low temperatures (cold processing), without requiring thermal energy to initiate gelatinization. 

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The rheological and application properties of pregelatinized flours are a direct result of both the botanical origin of the raw material and the specific process engineering applied. 

Two processing methods dominate the industry: 

Drum drying 

• Hydration kinetics characteristics: The products feature an ultra-short swelling time and the generation of high final viscosity. 
• Application: Very high thickening efficiency occurs even at minimal dosages. The availability of the flaked form (Flakes) guarantees excellent dispersibility in liquid systems and the complete elimination of agglomeration tendencies (lump formation). 

Thermomechanical extrusion 

• Hydration kinetics characteristics: It enables the achievement of a highly homogeneous structural matrix and a more controlled, linear viscosity development over time. 

• Application: Characterized by an extended water retention capacity. It allows for precise calibration of granulation (particle size) to match the specific requirements of production lines where rheological stability and prevention of syneresis in the finished product are critical. 

   

Raw material matrix vs. application profile 

Depending on the desired sensory and technological profile of the final product, pregelatinized flours of various botanical origins are selected: 

Bakery and gluten-free products 

In classic bakery, pregelatinized flour drastically increases dough water absorption without degrading its rheological parameters. The increased water addition directly enhances production yield (dough yield). From a physicochemical perspective, however, the deceleration of starch retrogradation processes is essential, as it extends bread freshness, limits staling, and ensures elasticity and excellent crumb porosity. 

In the case of gluten-free matrices (based on rice and corn), these flours compensate for the lack of a gluten network. They increase dough cohesion and elasticity, stabilizing the porous structure during baking. 

Meat industry and plant-based alternatives 

In meat processing and the production of meat analogs, pregelatinized flours act as highly effective natural hydrocolloids. Due to their high water-binding capacity, they reduce thermal losses (cooking loss) during sterilization, pasteurization, or frying. 

Equally significant is their ability to stabilize emulsion systems (water-fat). These flours prevent fat separation (leakage) during storage, improving juiciness and structural homogeneity, while providing the mouthfeel/creaminess desired by consumers, with the concurrent possibility of reducing the actual fat level in the recipe. 

Sauce systems, instant foods and snacks 

In soups and sauces, pregelatinized flours successfully replace chemically modified cross-linked starches. They deliver a smooth, creamy texture and rheological stability in cold-processed applications. In convenience products, instant porridges, and infant nutrition, they enable instant reconstruction of the target texture and viscosity upon contact with liquid at low temperatures. 

In the snack and extruded products sector (snacks, pellets), these flours control moisture distribution in the extruder, allowing for precise shaping of the expansion and crunchiness of the final product.