Modified Legume Starch Coating for Food Crispness
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Solution Overview
Problem
Existing methods for coating foods, particularly French fries, struggle to maintain crispness over time due to water regain after cooking, with existing coatings either being detectable by consumers or failing to provide long-lasting crispness.
Innovation Solution
A process using a chemically modified legume starch with an amylose content of less than 40%, specifically crosslinked pea starch, combined with dextrin, to create a coating composition that provides superior crispness and stability to water regain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional starch coatings are used to improve crispness, then initial crispness is achieved, but crispness is lost after cooking due to water regain
Solution Approach 1:
The patent applies parameter changes by using chemically modified starch with specific properties (amylose content between 20-40%, degree of substitution 0.03-0.2) to alter the coating's water barrier performance and thermal stability, enabling long-lasting crispness
Solution Approach 2:
The patent uses composite materials by combining chemically modified starch with specific physical and chemical properties with controlled formulation parameters to create a coating composition that provides both initial crispness and prolonged durability against water regain
2Strength
If high-molecular weight polysaccharide coatings are applied to improve appearance and crispness, then coating effectiveness increases, but the taste of the coating becomes detectable by consumers
Solution Approach 1:
The patent uses parameter changes by controlling the starch modification degree and amylose content to achieve a coating that is functionally effective but sensorially invisible, eliminating detectable taste while maintaining crispness
3Reliability
If amylose-rich starches are used to create barrier films, then water barrier properties improve, but the starch becomes difficult to cook and film-forming properties are limited
Solution Approach 1:
The patent applies parameter changes by chemically modifying starch to achieve optimal amylose content (20-40%) and degree of substitution (0.03-0.2), balancing water barrier reliability with improved cookability and film-forming properties
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 coating composition achieves long-lasting crispness and stability, with the crosslinked pea starch and dextrin combination outperforming other starches in maintaining product crispness and appearance, even after 15 minutes of cooling.
Implementation Method 1
crosslinked pea starch
Implementation Method 2
The coating film obtained constitutes an effective barrier to water
Data Source
AI summary
A process for coating food products, characterized in that the products are coated before they are cooked with an aqueous coating composition including a modified legume starch having an amylose content of less than 40%.