Water-Soluble Laundry Sheet Composition with Polyols for Stable Dissolution
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Solution Overview
Problem
Existing water-soluble laundry sheets face issues with storage stability, solubility, and cleaning power, particularly when attempting to increase the amount of detergent ingredients for improved cleaning, which often compromises the sheet's stability and dissolution rate.
Innovation Solution
Incorporation of a water-soluble film-forming polymer, polyol, and metal ion chloride into the laundry sheet formulation, along with a detergent ingredient and alkali builder, to enhance storage stability, solubility, and cleaning power while maintaining tensile strength suitable for mass production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of detergent ingredient is increased to improve cleaning power, then cleaning power is improved, but storage stability deteriorates
Solution Approach 1:
A water-soluble film-forming polymer is introduced as an intermediary carrier to encapsulate and stabilize detergent ingredients. The polymer forms a matrix that protects active ingredients during storage while enabling controlled release during washing, thus maintaining both storage stability and cleaning power.
Solution Approach 2:
The laundry sheet is formulated as a composite material system combining water-soluble film-forming polymer, polyol, metal ion chloride, and detergent ingredients. This composite structure allows the polymer network to provide structural stability while incorporating high concentrations of active cleaning agents, resolving the contradiction between stability and cleaning power.
2Reliability
If the amount of detergent ingredient is increased to improve cleaning power, then cleaning power is improved, but dissolution rate deteriorates
Solution Approach 1:
The physical and chemical parameters of the detergent formulation are optimized by adjusting polymer concentration, molecular weight, crosslinking density, and ingredient distribution. These parameter changes enable the sheet to maintain structural integrity while achieving rapid dissolution through controlled water penetration and polymer relaxation.
Solution Approach 2:
The detergent ingredient distribution is segmented and dispersed throughout the polymer matrix rather than concentrated in one location. This segmentation increases the surface area for water interaction and enables simultaneous dissolution of multiple active ingredients, improving overall dissolution rate while maintaining high cleaning power.
3Shape
If use of formulating agent is increased to form sheet-like shape, then sheet formation is improved, but amount of detergent ingredient is reduced
Solution Approach 1:
The water-soluble film-forming polymer creates a flexible, thin-film matrix that provides sufficient structural support for sheet formation while minimizing the volume occupied by the formulating agent. This thin-film structure allows maximum incorporation of detergent ingredients without compromising sheet integrity.
Solution Approach 2:
The formulation employs local quality optimization by concentrating detergent ingredients in specific regions or phases within the polymer matrix, such as micellar structures or interstitial spaces. This allows high detergent loading in critical areas while maintaining overall sheet structure with minimal formulating agent.
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 results in a laundry sheet with improved storage stability, rapid dissolution in water, and enhanced cleaning power, maintaining physical properties suitable for commercial production despite using a small amount of formulating agent.
Implementation Method 1
a water-soluble laundry sheet including a laundry detergent ingredient, a water-soluble film-forming polymer and an alkali builder, wherein the water-soluble laundry sheet includes a polyol and/or metal ion chloride
Implementation Method 2
the dissolution rate of a detergent in washing water during washing affects cleaning power. Particularly, in the case of a sheet-like laundry detergent including a formulating agent, there is a problem in that the detergent is disintegrated slowly due to low solubility
Implementation Method 3
a water-soluble laundry sheet which includes a water-soluble film-forming polymer solidified in the form of a film, wherein a laundry detergent ingredient is distributed among the water-soluble film-forming polymer chains
Implementation Method 4
When the amount of a detergent ingredient is increased to improve cleaning power
Data Source
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.