Polyol Laundry Sheet Composition for Stability and Fast Dissolution
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Solution Overview
Problem
Existing water-soluble laundry sheets face issues with storage stability, dissolution rate, and cleaning power, particularly when incorporating high amounts of detergent ingredients, which can degrade stability and solubility.
Innovation Solution
Incorporation of a polyol, such as sorbitol, in combination with a water-soluble film-forming polymer and an alkali builder, to enhance storage stability and cleaning power while maintaining a small amount of formulating agent, allowing for high detergent content and rapid dissolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional liquid detergents are used, then cleaning performance is achieved, but storage space consumption increases and handling becomes cumbersome
Solution Approach 1:
The invention transforms the detergent from liquid phase to solid phase by incorporating it into a water-soluble sheet structure. The detergent composition is embedded within the sheet matrix, allowing it to maintain solid form for easy storage and handling, while dissolving in water during use to provide liquid-like cleaning action. This phase transition resolves the contradiction between convenient handling/small storage space and effective cleaning performance.
Solution Approach 2:
The invention creates a composite structure where detergent composition is integrated with water-soluble film-forming polymers and fillers to form a sheet. This composite material combines the cleaning properties of conventional liquid detergents with the handling advantages of solid sheets, eliminating the need for separate liquid containers while maintaining cleaning efficacy.
2Ease of manufacture
If conventional liquid detergents are used, then cleaning function is provided, but environmental pollution increases due to packaging waste
Solution Approach 1:
The invention extracts and eliminates the need for external packaging by integrating the detergent directly into a water-soluble sheet. The sheet itself serves as both the product container and the product, with no separate packaging required. This extraction of packaging requirements directly reduces plastic waste and environmental pollution while maintaining manufacturing simplicity.
Solution Approach 2:
The water-soluble sheet is designed as a disposable product that dissolves completely in water during use. This eliminates the need for durable packaging materials and allows the entire product to be biodegradable, reducing environmental persistence and pollution from packaging waste while keeping manufacturing processes simple and cost-effective.
3Reliability
If high concentrations of detergent are used in liquid form, then cleaning performance improves, but stability and shelf life decrease due to bacterial growth
Solution Approach 1:
By transitioning from liquid to solid phase, the detergent achieves inherent stability against bacterial growth that plagues liquid formulations. The solid sheet structure with controlled moisture content creates an environment unfavorable for microbial proliferation, while the detergent maintains high concentration and effectiveness. When dissolved in water, it restores full cleaning performance, thus resolving the contradiction between stability and productivity.
4Strength
If water-soluble sheets are made with high polymer content, then sheet strength improves, but dissolution speed decreases
Solution Approach 1:
The invention applies local quality by creating a non-uniform distribution of polymers and fillers within the sheet structure. Certain regions have higher polymer concentration for strength, while other regions are optimized for rapid water penetration and dissolution. This spatial variation in composition allows the sheet to simultaneously achieve high strength and fast dissolution rates, resolving the contradiction between these two 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 solution provides improved storage stability, rapid dissolution, and enhanced cleaning power, suitable for mass production, with a tensile strength that prevents breakage during handling.
Implementation Method 1
comprising 5 to 50 mass% of a water-soluble polymer
Implementation Method 2
soluble laundry sheet comprising polyol or metal ion chloride
Implementation Method 3
comprising polyol or metal ion chloride
Data Source
Figure 1~3b
Figure 3c~5
Figure 6
AI summary
The present invention provides a water-soluble laundry sheet comprising a detergent ingredient for laundry, a water-soluble film-forming polymer, and an alkali binder, wherein the laundry sheet comprises any one or more selected from the group consisting of polyols and metal ion chlorides. The present invention provides a water-soluble laundry sheet with enhanced formulation stability, storage stability, and sheet solubility.