Water-Soluble Detergent Film Blend for Cold-Wash Dissolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Water-soluble unit-dose detergent articles experience delayed dissolution and residue formation due to gelling during initial contact with water, particularly in short and cold temperature cleaning programs, leading to residue deposition on fabrics or washing machines.
Innovation Solution
A water-soluble unit dose detergent article comprising a polyvinyl alcohol polymer blend with specific anionic monomer units and viscosity properties, sealed within multiple compartments, to enhance dissolution and prevent residue formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-soluble film comprising polyvinyl alcohol is used to envelop detergent, then the detergent can be released upon contact with water, but gelling occurs during initial dissolution that slows down further dissolution and leads to residue formation
Solution Approach 1:
The patent modifies the physical and chemical parameters of the polyvinyl alcohol film by incorporating specific additives (ionic compounds, plasticizers, and crosslinking agents) that change the dissolution kinetics. These parameter changes prevent gel formation during initial contact with water, enabling complete and rapid dissolution without residue formation, thus resolving the contradiction between dissolution completeness and dissolution time.
Solution Approach 2:
The patent creates a composite water-soluble film material by combining polyvinyl alcohol with multiple functional additives including ionic compounds (such as sodium chloride, calcium chloride), plasticizers (such as glycerol, sorbitol), and crosslinking agents. This composite material maintains film integrity for storage while enabling controlled rapid dissolution in use, preventing the gelling issue that plagues pure polyvinyl alcohol films.
2Use of energy by stationary object
If the cleaning process takes place in short and cold temperature cleaning programs, then energy consumption is reduced, but gelling is more acute leading to delayed dissolution and residue deposition
Solution Approach 1:
The patent incorporates ionic compounds and plasticizers that lower the gelation temperature and modify the dissolution thermodynamics of the polyvinyl alcohol film. These parameter changes ensure that even in cold water conditions, the film dissolves completely without forming gels, maintaining dissolution reliability while enabling energy-efficient cold wash programs.
Solution Approach 2:
The patent introduces ionic compounds and plasticizers as intermediary substances that mediate between the polyvinyl alcohol film and cold water. These intermediaries prevent the direct interaction that causes gelation in cold conditions, allowing the film to dissolve properly even at low temperatures, thus enabling reliable cleaning in energy-saving cold wash programs.
3Speed
If the detergent article is designed for rapid dissolution, then cleaning onset is improved, but residue formation increases on fabrics and washing machines
Solution Approach 1:
The patent carefully adjusts the parameters of the polyvinyl alcohol film including molecular weight, degree of hydrolysis, and additive concentrations to achieve optimal dissolution kinetics. These parameter changes enable the film to dissolve rapidly and completely, converting the entire film material into soluble components that do not form residues, thus resolving the contradiction between dissolution speed and residue formation.
Solution Approach 2:
The patent designs the water-soluble film as a disposable component that completely dissolves after serving its purpose of containing and releasing the detergent. By ensuring complete dissolution of the film material itself (not just the detergent contents), the design eliminates persistent residues on fabrics and washing machines, aligning with the concept of a truly disposable, environmentally friendly cleaning system.
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 ensures rapid dissolution and minimizes residue formation, improving cleaning efficiency and reducing the need for additional user steps in short and cold washing programs.
Implementation Method 1
The water-soluble unit dose article comprises a water-soluble film and a detergent composition. The detergent composition is enveloped by the water-soluble film. The water-soluble unit dose article is added to water and the film dissolves releasing the detergent.
Data Source
AI summary
Water-soluble unit dose article comprising a fabric care or household care detergent composition and a method of making it.