Single-Chamber Detergent Pouch With Stable Multi-Phase Separation
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Solution Overview
Problem
Existing unit dose detergent products face challenges such as increased manufacturing costs and operational failures due to multi-compartment pouches, formulation compatibility issues with aqueous-based detergents, and aesthetic concerns, particularly when using water-soluble polymeric films.
Innovation Solution
Development of single-compartment unit dose detergent compositions with a water-soluble container, comprising multiple phases like solid powder, gel, and liquid phases, where the phases demonstrate minimal intermixing, using a polyvinylalcohol (PVOH) film pouch, optimized for automatic dishwashing and laundry applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multi-compartment pouches are used to separate different detergent compositions, then functional separation is achieved, but manufacturing complexity and costs increase
Solution Approach 1:
The patent merges multiple detergent compositions into a single compartment pouch, eliminating the need for multiple sealed compartments. Different compositions (detergent, rinse aid, fabric softener) are layered within one compartment, reducing manufacturing complexity while maintaining functional separation through physical layering rather than structural compartmentalization.
Solution Approach 2:
The patent segments different detergent compositions into distinct layers within a single compartment. Each layer remains physically separated during storage and handling, allowing functional separation without requiring multiple sealed compartments. The layers are designed to dissolve and mix in a controlled sequence during the wash cycle.
2Stability of the object's composition
If multi-compartment pouches are used, then different compositions are protected from premature mixing, but operational reliability decreases due to increased failure points
Solution Approach 1:
By combining all compositions into a single compartment, the patent eliminates the multiple seals and barriers required in multi-compartment designs. This reduces the number of potential failure points while maintaining composition stability through careful formulation of layers that resist premature mixing but dissolve reliably under wash conditions.
3Ease of operation
If water-soluble polymeric films are used for the container, then ease of dissolution is improved, but formulation compatibility becomes difficult to achieve
Solution Approach 1:
The patent adjusts formulation parameters such as pH, ionic strength, and solvent composition to ensure compatibility between the water-soluble polymeric film and the detergent compositions. By carefully controlling these parameters, the film dissolves readily while maintaining stability with aqueous-based detergents, overcoming the formulation compatibility challenges.
4Device complexity
If multiple phases are included in a single compartment, then manufacturing simplicity is improved, but phase separation and stability become challenging
Solution Approach 1:
The patent assigns different physical properties to different layers, creating local quality variations. Each phase (powder, gel, liquid) is formulated with specific viscosity, density, and surfactant characteristics that prevent intermixing during storage. The layers are arranged in a stable configuration where heavier phases are positioned below lighter phases, maintaining stability without requiring additional compartmentalization.
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 reduces manufacturing complexity and costs, enhances cleaning performance, and provides an aesthetically pleasing product by ensuring the phases remain separate and effective during use, improving soil removal from dishware and fabrics.
Implementation Method 1
a water-soluble single-chamber container, such as a pouch
Data Source
AI summary
The present invention provides unit dose detergent products, such as those in the form of compositions comprising: a water-soluble single-chamber container, such as a pouch; and a cleaning system comprising at least one detersive surfactant, and optionally one or more additional components. The invention also provides methods of production of such compositions, and methods use of such compositions in processes for cleaning dishware and/or fabrics, including garments, by introducing one or more of the unit dose products of the invention into an automatic washing machine suitable for washing dishware or laundry, whereby the cleaning system is released such that it comes into contact with a soiled article (e.g., dishware or fabrics) under conditions favoring the removal of one or more soils from the article.