Agar-Based Adhesive Layer for High Water Content and Shape Retention
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional adhesive bases containing gelatin have pH limitations that restrict the types of medicinal or cosmetic components that can be added, affecting shape retention, cohesion, and adhesion, and lack the high water content and reduced residue characteristics achieved with gelatin-based bases.
Innovation Solution
An adhesive article with a backing and an adhesive layer formed from an adhesive base containing no gelatin but with readily soluble agar, which dissolves at 70°C, allowing for high water content, excellent shape retention, and reduced sticky residue, while enabling the inclusion of desired components and pH levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If gelatin is added to the adhesive base to improve shape retention and cohesion, then the adhesive layer achieves high water content and excellent shape retention, but the pH of the adhesive base becomes limited which restricts the types of medicinal or cosmetic components that can be added
Solution Approach 1:
The patent changes the fundamental parameter of the adhesive base from gelatin-based to agar-based. This parameter change eliminates the pH restrictions that plagued gelatin-based adhesives, allowing formulators to freely adjust pH to accommodate various medicinal and cosmetic components while maintaining shape retention and cohesion through agar's unique gelling properties
Solution Approach 2:
The patent creates a composite adhesive base system using agar combined with water-soluble polymers (such as polyacrylic acid or polyacrylate). This composite approach leverages agar's excellent shape retention and cohesion properties while the water-soluble polymer components provide pH flexibility and compatibility with various active ingredients, solving both the shape retention and design freedom requirements
2Object-generated harmful factors
If gelatin is used in the adhesive base to achieve high water content and excellent shape retention, then the adhesive layer has reduced sticky residue, but the manufacturing process becomes more complex due to pH constraints and limited component selection
Solution Approach 1:
By changing the base material from gelatin to agar, the patent eliminates the pH constraint complexity that required careful formulation adjustments. This parameter change simplifies the manufacturing process while maintaining the beneficial property of reduced sticky residue through agar's superior gelling characteristics and water content retention
3Adaptability or versatility
If no gelatin is added to the adhesive base to eliminate pH limitations, then the freedom of design is improved, but the adhesive layer loses high water content and satisfactory shape retention
Solution Approach 1:
The patent substitutes gelatin with agar as the gelling agent, fundamentally changing the parameter of the adhesive base composition. This substitution maintains the ability to achieve high water content and excellent shape retention while eliminating the pH restrictions, thereby preserving both shape retention and design freedom simultaneously
Solution Approach 2:
The patent develops a composite adhesive base using agar combined with water-soluble polymers. This composite material system provides the shape retention properties previously only achievable with gelatin, while the water-soluble polymer component enables pH adjustment and component selection freedom, solving the contradiction between shape retention and design versatility
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 adhesive article achieves high water content, excellent adhesion, and reduced sticky residue, simplifying manufacturing and enhancing design flexibility by eliminating pH and heat-related constraints, and improving tack strength and usage feel.
Implementation Method 1
readily soluble agar, which dissolves at 70°C
Implementation Method 2
adhesive layer having a high enough water content can be formed
Data Source
AI summary
An adhesive article comprising a backing and an adhesive layer disposed on at least one side of the backing, wherein the adhesive layer is formed from an adhesive base that contains substantially no gelatin and does contain readily soluble agar.