Water-Soluble PVA Foil for Unit-Dosed Detergent Packaging
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Solution Overview
Problem
Traditional detergent packaging for dish washing machines often results in spillage and incorrect dosing, requiring users to unwrap and measure detergent, which can lead to contamination and inefficiency.
Innovation Solution
A water-soluble packaging material, specifically a polyvinyl alcohol copolymer with a water content below 7.5%, is used to create a unit packaged detergent that dissolves in water, eliminating the need for unwrapping and ensuring precise dosing by encapsulating the detergent in a foil that maintains stiffness for high-speed packaging and efficient dissolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional detergent packaging is used, then users can access the detergent, but spillage and incorrect dosing occur requiring unwrapping and measuring
Solution Approach 1:
The detergent is segmented into individual unit-dosed packets, each containing a precise amount of detergent. This segmentation eliminates the need for users to measure or unwrap, as each packet is a self-contained dosing unit that prevents spillage and ensures accurate detergent application.
Solution Approach 2:
The detergent is pre-packaged in water-soluble films with precise dosing already prepared. The dosing action is performed in advance during manufacturing, eliminating the need for user intervention. The pre-packaged units are designed to dissolve and release the exact detergent amount needed without requiring unwrapping or measuring by the user.
2Productivity
If detergent is wrapped in water soluble material, then spillage is prevented, but the material must be stiff enough for high-speed packaging
Solution Approach 1:
The water content of the polyvinyl alcohol copolymer is precisely controlled to be below 7.5%, which optimizes the balance between stiffness and water solubility. This parameter change ensures the film has sufficient stiffness for high-speed packaging operations while maintaining its ability to dissolve rapidly in water during the washing cycle.
Solution Approach 2:
The packaging uses a copolymer of polyvinyl alcohol with other monomers, creating a composite material that combines the desired stiffness for packaging with enhanced water solubility. The copolymer structure allows optimization of both mechanical properties for handling and chemical properties for dissolution.
3Strength
If the water content is reduced below 7.5%, then the foil maintains stiffness for packaging, but dissolution speed must remain fast
Solution Approach 1:
The water content is precisely controlled to be below 7.5%, which is the critical threshold that maintains adequate stiffness for packaging while preserving fast dissolution characteristics. This parameter optimization ensures the film remains handleable during packaging but dissolves rapidly during the washing cycle.
Solution Approach 2:
The copolymer composition is engineered to provide the right balance of hydrophobic and hydrophilic segments, allowing the material to maintain structural integrity at low water content for packaging stiffness, while still possessing sufficient hydrophilicity to ensure rapid dissolution when exposed to washing water.
4Measurement precision
If unit packaged detergent is used, then correct dosage is ensured, but user contact with detergent is eliminated
Solution Approach 1:
The detergent is divided into individual unit-dosed packets, each containing the precise amount of detergent needed. This segmentation eliminates user contact with bulk detergent and ensures accurate dosing, as each packet is a pre-measured unit that is safely enclosed in water-soluble packaging.
Solution Approach 2:
The water-soluble packaging film acts as an intermediary between the user and the detergent. It allows the user to handle and place the detergent packet without direct contact with the detergent itself, while still enabling the detergent to be delivered accurately to the washing cycle when the packet dissolves.
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 prevents spillage, ensures accurate detergent dosage, and prevents user contact with the detergent, enhancing cleaning performance and manufacturing efficiency while maintaining effective cleaning results.
Implementation Method 1
a water soluble packaging material, specifically a polyvinyl alcohol copolymer with a water content below 7.5%, is used to create a unit packaged detergent that dissolves in water
Data Source
AI summary
The present invention relates to a water soluble material and a foil useful for wrapping a detergent composition. The present invention further relates to a packaged detergent and/or additive composition, e.g. for the dish washing machine wrapped in said water soluble material or foil, and a process of manufacturing thereof.