Scratch-and-Sniff Coating Using Non-Encapsulated Fragrance and Shellac
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Solution Overview
Problem
Existing scratch-and-sniff coatings for the food and beverage industry face limitations due to chemical and physical reactions in microencapsulation processes, which can be affected by flavor formulation and use of toxic materials, and water-soluble polymers resulting in non-water-resistant coatings.
Innovation Solution
A scratch-and-sniff coating comprising a non-encapsulated flavor/fragrance component in a polysaccharide matrix, topped with a water- and heat-resistant shellac coating, which is applied in two layers to ensure stability and fragrance release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microencapsulation is used to provide scratch-and-sniff coating, then fragrance encapsulation is achieved, but chemical reactions may adversely affect flavor formulation and toxic materials are used
Solution Approach 1:
The patent extracts the problematic microencapsulation step entirely, using non-encapsulated flavor/fragrance components directly in the coating formulation. This eliminates the need for toxic wall materials like aminoplast resins and polyurethane, and avoids adverse chemical reactions while maintaining fragrance delivery functionality through the polysaccharide-based coating system
Solution Approach 2:
The patent introduces polysaccharides (such as starch, cellulose, or their derivatives) as intermediary materials that replace toxic microencapsulation wall materials. These polysaccharides form a safe, edible matrix that holds and releases fragrance components without requiring toxic chemicals, thus mediating between fragrance delivery needs and food safety requirements
2Ease of manufacture
If water-soluble polymers are used to form coating matrix, then coating formation is simplified, but water resistance is lost
Solution Approach 1:
The patent creates a composite coating system combining water-soluble polysaccharide matrix with water-resistant additives or cross-linked structures. This composite approach maintains the ease of aqueous application while imparting water resistance through the interaction between polysaccharide components and other materials, achieving both manufacturability and durability
Solution Approach 2:
The patent modifies the physical and chemical parameters of the polysaccharide coating through controlled drying, heat treatment, or cross-linking processes. These parameter changes transform the initially water-soluble coating into a water-resistant film while maintaining the simplicity of aqueous application, thus resolving the contradiction between ease of manufacture and water resistance
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 solution provides a stable, water- and heat-resistant scratch-and-sniff coating that effectively releases fragrance upon scratching, addressing the limitations of existing technologies by using non-toxic materials and ensuring durability in food and beverage applications.
Implementation Method 1
a first coating comprised of a non-encapsulated flavor/fragrance component and a polysaccharide component
Implementation Method 2
the second layer comprised of a water- and heat-resistant shellac component
Implementation Method 3
scratch-and-sniff coating that effectively releases fragrance upon scratching
Data Source
AI summary
A scratch-and-sniff coating is provided comprised of a first coating on a substrate having a water- and heat-resistant second coating thereon, the first coating being comprised of a non-encapsulated flavor/fragrance component and a polysaccharide component, and the second coating comprised of a shellac component. The scratch-and-sniff coating is made by forming a first coating comprised of a non-encapsulated flavor/fragrance component and a polysaccharide component and drying the first coating, and forming a water- and heat-resistant shellac-containing second coating on the first coating, and drying the second coating. An encapsulated flavor/fragrance component may optionally be present in the first coating. The scratch-and-sniff coating can be applied to a package for a consumer article.