Rice Flour Composition for Low-Fat Snack Processing
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Solution Overview
Problem
The challenge lies in creating fabricated snack products with high concentrations of rice flour while maintaining desirable textural qualities and reducing fat content, as rice flour can lead to processing issues such as inelastic doughs and undesirable textures like cracker-like or glassy hardness, which differ from the preferred crispy texture of potato-based snacks.
Innovation Solution
A rice flour composition with specific properties, including a range of 20-95% rice flour and 5-80% acetylated rice starch, is used to create cohesive doughs that can be processed into snacks with lower water content and fat, utilizing long and medium grain rice flours, and incorporating gelatinized and extruded rice flours to enhance elasticity and crispiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If high concentrations of standard rice flour are used in the dough, then the fat content of the final product is reduced, but the processing becomes dramatically more difficult and the texture becomes dense and hard
Solution Approach 1:
The patent changes the functional parameters of rice flour by using specifically modified rice flours with controlled water absorption index (WAI) and peak viscosity values. This allows high concentrations of rice flour (70-95%) to be used while maintaining processability and desirable texture, resolving the contradiction between fat reduction and manufacturing ease
Solution Approach 2:
The patent creates a composite rice flour system by blending different types of rice flours (extruded, parboiled, pregelatinized) with specific functional properties. This composite approach enables the dough to achieve both low fat content and acceptable processing characteristics that cannot be obtained with single rice flour types
2Loss of substance
If high concentrations of standard rice flour are used in the dough, then the fat content of the final product is reduced, but the texture becomes dense and hard rather than crispy
Solution Approach 1:
The patent modifies the physical parameters of rice flour through extrusion, parboiling, and pregelatinization processes. These treatments change the starch structure and gelatinization properties, enabling the final product to achieve a crispy texture similar to potato snacks even when using 70-95% rice flour, thus resolving the texture contradiction
3Ease of manufacture
If the water content of the dough is increased to process high rice flour concentrations, then the dough becomes more processable, but the fat content of the final product increases
Solution Approach 1:
The patent changes the water absorption characteristics of rice flour through modification processes (extrusion, parboiling, pregelatinization) to achieve flours with controlled WAI values. This allows the dough to be processed at high rice flour concentrations without requiring excessive water, thereby maintaining low fat content while ensuring manufacturability
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method results in snack products with the desired organoleptic properties, achieving a crispy texture and lower fat content comparable to full-fat snacks, while maintaining the lightness and crunchiness of potato-based snacks, thus addressing the processing difficulties and texture issues associated with high rice flour concentrations.
Implementation Method 1
specific chemical modifications of rice starch have a unique functionality in snack formulations, providing additional product crispiness and facilitating the dough-making process
Implementation Method 2
rice starch has one of the highest gelatinization temperatures among the starches (72°C) available for use in snacks
Implementation Method 3
incorporating gelatinized and extruded rice flours to enhance elasticity and crispiness
Data Source
AI summary
A rice flour composition having: from about 20% to about 95%, by weight, of a rice flour that has a WAI of from about 2.6 to about 9; and a Peak Viscosity from about 4 RVU to about 130 RVU; and from about 5% to about 80%, by weight, of rice starch materials that have a WAI of below about 2.2; a Peak Viscosity from about 100 RVU to about 900 RVU, and a soluble amylose content of less than 10%, by weight. The rice starch materials can be selected from the group consisting of waxy rice starch, acetylated rice starch, cross linked rice starch and mixtures thereof. The compositions can be used to produce food products such as fabricated sheeted snacks, extruded products, sauces, coatings for fried foods, dog foods, dog biscuits, baby foods and breads. The preferred dough formed from the inventive rice flour composition is sheetable and forms a cohesive dough. Fabricated snacks made from this dough has the desired taste and texture characteristics. A dry blend for a preferred fabricated snack comprises from about 2% to about 100%, preferably from about 20% to about 85%, most preferably from about 40% to about 75%, of the rice flour composition.