Pregelatinized Starch Process Tolerance via Drum Drying
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Solution Overview
Problem
Current pregelatinized starches, particularly those produced by drum drying, suffer from low process tolerance, high solubility, and undesirable textural qualities such as cohesiveness and stringiness, which are undesirable in food products like gravies, sauces, and dairy products.
Innovation Solution
A pregelatinized starch with less than 15 wt% solubles and a sedimentation volume of 20 mL/g to 45 mL/g, produced through drum drying, which maintains a substantially planar form and high process tolerance, minimizing fragmentation and cohesiveness when rehydrated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If drum drying is used to pregelatinize starch, then cost is reduced and productivity is improved, but process tolerance deteriorates and solubility increases
Solution Approach 1:
The patent changes the physical parameters of drum drying by controlling moisture content (20-40%), temperature (60-100°C), and drying time to achieve pregelatinization while maintaining process tolerance. This resolves the contradiction by optimizing drying parameters to prevent excessive solubility and granule fragmentation.
Solution Approach 2:
The patent applies preliminary gelatinization treatment before final drying, where starch is partially gelatinized at controlled moisture and temperature, then dried to preserve granule integrity. This preliminary action allows the starch to achieve desired pregelatinization without the harsh conditions that would compromise process tolerance.
2Reliability
If chemical modification is applied to improve process tolerance, then reliability is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent replaces chemical modification methods with a physical drum drying process that achieves pregelatinization through controlled heat and moisture. This mechanical/physical approach eliminates the need for chemical agents and modification steps, reducing manufacturing complexity while maintaining process tolerance.
Solution Approach 2:
The patent uses simple, inexpensive drum drying equipment instead of complex chemical modification systems. The process uses readily available heat and moisture controls, avoiding expensive chemical reagents and complex modification apparatus, thereby reducing both device complexity and cost.
3Ease of operation
If conventional pregelatinized starch is used, then texturizing ability is improved, but cohesiveness and stringiness increase
Solution Approach 1:
The patent changes the physical state parameters of starch by controlling the degree of pregelatinization through drum drying. By maintaining specific moisture content and temperature ranges, the starch achieves texturizing ability while preserving granule integrity, preventing the cohesiveness and stringiness associated with over-pregelatinized starch.
Solution Approach 2:
The patent uses controlled moisture application and removal during drum drying to achieve uniform pregelatinization. The hydraulic control of moisture content prevents excessive swelling and fragmentation that would lead to cohesiveness, while still providing adequate texturizing ability.
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 starch provides desirable texturizing properties without cohesiveness or stringiness, maintaining process tolerance and stability in food products, while being cost-effective and free from chemical modifications, thus suitable for 'clean label' applications.
Implementation Method 1
drum drying involves the passing of a moistened starch material over a hot rotating drum and squeezing it through a narrow opening made between the drum and another surface... The process is performed at temperatures sufficient to not only pregelatinize the starch but also to dry much of the water out of it
Implementation Method 2
drum drying involves the passing of a moistened starch material over a hot rotating drum... The process is performed at temperatures sufficient to not only pregelatinize the starch but also to dry much of the water out of it
Data Source
AI summary
This disclosure relates to pregelatinized starches having a high degree of process tolerance, and methods for making and using them. In one aspect, the disclosure provides a pregelatinized starch having no more than 15 wt % solubles and a sedimentation volume in the range of 20 mL/g to 45 mL/g, the pregelatinized starch being in the form of agglomerates comprising starch particles, the pregelatinized starch being in a substantially planar form. In another aspect, the disclosure provides a pregelatinized starch having no more than 15 wt % solubles, and a sedimentation volume in the range of 20 mL/g to 45 mL/g, the pregelatinized starch being in the form of agglomerates comprising starch particles. In certain embodiments, the starch is drum-dried. In certain embodiments, the pregelatinized starches of the disclosure have a Yellowness Index no more than 10.