Encased Snack Process for Shelf-Stable High-Filling Snacks
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Solution Overview
Problem
Conventional snacks with high filling content face issues of irregular shape and short shelf-life, especially when exposed fillings are not heat-treated, leading to a need for snacks that are appealing, shelf-stable, and preservative-free with a fully encased crumb material.
Innovation Solution
A process involving forming crumb material under pressure to create a shell, introducing a filling, and forming a cover of crumb material under pressure, with optional baking to achieve a water activity of 0.60 or more, ensuring an evenly shaped snack with extended shelf-life and appealing appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If co-extrusion of bread crumbs and filling is used, then snack production is efficient, but the snack has irregular shape and short shelf-life
Solution Approach 1:
The patent applies preliminary action by forming the crumb material into a shell structure before introducing the filling. This pre-formed shell provides structural integrity and regular shape, allowing high filling content (exceeding 40 wt.%) without compromising shape regularity or shelf-life. The shell is created by shaping crumb material under pressure, then the filling is introduced into this pre-formed structure.
2Quantity of substance
If high filling content is used, then snack appeal is improved, but shelf-life decreases and preservatives are needed
Solution Approach 1:
The patent applies parameter changes by controlling the water activity (aw) of both the crumb material and filling to 0.60 or more (preferably 0.85 or more, more preferably 0.93 to 0.98). This parameter control allows high filling content exceeding 40 wt.% while achieving shelf-life of more than 6 weeks at chilled or ambient temperatures without requiring preservatives. The water activity parameter is the key control point that enables both high filling content and extended shelf-life.
3Shape
If exposed filling is used, then snack appearance is improved, but heat treatment is required which affects shelf-life
Solution Approach 1:
The patent applies the nested doll principle by completely enclosing the filling within a crumb material shell and cover. The filling is nested inside the shell formed from crumb material, and then a cover of crumb material is formed on top of the filling. This complete encasement protects the filling from oxidation and contamination, allowing the snack to maintain appealing appearance with high filling content while achieving extended shelf-life of more than 6 weeks without heat treatment or preservatives.
4Duration of action of stationary object
If preservatives are added, then shelf-life is extended, but product appeal decreases due to health concerns
Solution Approach 1:
The patent eliminates preservatives by changing the water activity parameter control approach. By controlling the water activity of both crumb material and filling to 0.60 or more (preferably 0.85 or more, more preferably 0.93 to 0.98), the patent achieves shelf-life of more than 6 weeks at chilled or ambient temperatures through natural water activity control rather than chemical preservatives. This parameter-based approach extends shelf-life while maintaining product appeal for health-conscious consumers.
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 process results in snacks with improved shelf-life and taste, maintaining an appealing appearance even after prolonged storage, especially when refrigerated, without the need for preservatives, and with a high filling content fully encased in crumb material.
Implementation Method 1
forming the crumb material under pressure to produce a shell
Implementation Method 2
forming a cover of crumb material on the filling in the shell under pressure
Implementation Method 3
optionally baking the thus form assembly
Data Source
AI summary
The invention is directed to a process for the preparation of an encased snack comprising in this order the steps of (1) providing crumb material, (2) forming the crumb material under pressure to produce a shell, (3) introducing a filling into the shell, (4) forming a cover of crumb material on the filling in the shell under pressure, and (5) optionally baking the thus formed assembly. The invention is also directed to the encased snack obtainable by the process and to a mold comprising a lower die and first and second upper dies for use in the process.