Biodegradable Superabsorbent Core With Visible Absorbency Indication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional absorbent articles using biodegradable superabsorbent polymers are perceived as less effective in absorbency and rewet capacity compared to those using synthetic SAP, leading to consumer skepticism about their environmental friendliness.
Innovation Solution
Incorporating a biodegradable superabsorbent polymer (bioSAP) into absorbent articles that changes color visibly from a dry state to a wet state, with a CIELab color space difference (ΔE) of at least 2, indicating absorbency through a visible color shift.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If biodegradable superabsorbent polymer (bioSAP) is used instead of synthetic SAP, then environmental sustainability is improved, but perceived absorbency effectiveness deteriorates
Solution Approach 1:
The patent applies color-changing indicators that visibly transition from a first color in dry state to a second color in wet state, enabling consumers to directly observe absorbency effectiveness. This visual feedback mechanism resolves the perception issue by providing tangible evidence that bioSAP performs as effectively as synthetic SAP, thereby maintaining consumer trust while achieving environmental sustainability goals
2Reliability
If conventional synthetic SAP is used, then absorbency effectiveness is maintained, but environmental sustainability deteriorates
Solution Approach 1:
By incorporating color-changing indicators with measurable CIELab color space differences (ΔE ≥ 2), the patent provides visual confirmation of absorbency performance. This allows bioSAP to replace synthetic SAP without compromising perceived effectiveness, as consumers can visually verify that the biodegradable material performs equivalently to conventional synthetic materials
Solution Approach 2:
The patent specifies quantitative parameters including CIELab color space difference (ΔE ≥ 2, preferably ≥ 5, more preferably ≥ 10, even more preferably ≥ 20) to objectively measure and communicate absorbency effectiveness. These parameter specifications ensure that bioSAP performance meets or exceeds consumer expectations established by synthetic SAP products
3Device complexity
If no visual absorbency indicator is provided, then device complexity is reduced, but information about absorbency capacity is lost
Solution Approach 1:
The patent utilizes inherent color changes in bioSAP materials and complementary visual indicators that leverage the natural optical properties of the absorbent core. This approach provides rich absorbency information through simple color transitions without requiring complex mechanical or electronic indicator systems, thereby maintaining structural simplicity while effectively communicating absorbency capacity
Solution Approach 2:
The color-changing indicators are integrated directly into the absorbent core structure, allowing the material itself to provide visual feedback about its absorption state. This self-indicating mechanism eliminates the need for separate, complex indicator systems while providing continuous, real-time information about absorbency capacity
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 visible color change in the absorbent article demonstrates its absorbency capacity, reassuring consumers of its effectiveness and reducing the need for petroleum-based wetness indicators, thus enhancing consumer trust in eco-friendly products.
Implementation Method 1
the superabsorbent material comprises biodegradable superabsorbent material (bioSAP) that has a first color in dry state and a second color in wet state
Implementation Method 2
first color and the second color has a CIELab color space difference (ΔE) of at least 2, preferably of at least 5, more preferably of at least 10, even more preferably of at least 20
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
An absorbent article (1) comprising: - a liquid permeable topsheet (2), - a liquid impermeable backsheet (3), and - an absorbent core (4) positioned between said topsheet (2) and backsheet (3), wherein the absorbent core (4) comprises an absorbent material (5), said absorbent material comprising a mixture, or blend, of cellulose fibers (5a) and superabsorbent material (5b), characterized in that the superabsorbent material comprises biodegradable superabsorbent material (bioSAP) that has a first color in dry state and a second color in wet state, and in that first color and the second color has a CIELab color space difference (ΔE) of at least 2 as measured according to the test method herein.