Laundry Sheet Composition for Stable Whitening and Stain Removal
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Solution Overview
Problem
Existing whitening agents, particularly fluorescent whitening agents, struggle with uneven distribution, migration, and poor stain-removing capabilities, leading to inadequate fabric whitening and potential fabric damage in liquid and fabric-based forms.
Innovation Solution
A whitening and stain-removing laundry sheet is developed, utilizing a water-soluble polymer complex formed by polyvinyl alcohol and polyvinylpyrrolidone to encapsulate the fluorescent whitening agent, combined with specific surfactants and plant extracts, ensuring even distribution and enhanced stain removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a high content of fluorescent whitening agent is used to enhance whitening effect, then the whitening effect is improved, but the agent is prone to fall off and migrate during washing, resulting in poor whitening effect and fabric damage
Solution Approach 1:
The patent encapsulates fluorescent whitening agents within a water-soluble polymer matrix structure, creating a nested configuration where the whitening agents are contained within the polymer network. This prevents migration and fall-off during washing while maintaining high effectiveness, directly resolving the contradiction between quantity and stability.
Solution Approach 2:
The patent creates a composite material system combining water-soluble polymers with fluorescent whitening agents, surfactants, and plant extracts. This composite structure integrates multiple components that work synergistically to stabilize the whitening agents while enhancing overall washing performance, solving the stability issue at high concentrations.
2Quantity of substance
If a liquid fluorescent whitening agent composition with high concentration is used to improve whitening effect, then the whitening effect is enhanced, but the composition lacks washing and stain-removing abilities and has a short shelf life
Solution Approach 1:
The patent develops a multi-functional laundry sheet that simultaneously provides whitening, washing, and stain-removing capabilities. By integrating fluorescent whitening agents with surfactants and enzyme preparations in a single water-soluble matrix, the product achieves universal functionality, eliminating the need for separate washing and whitening products.
Solution Approach 2:
The patent merges multiple functional components (fluorescent whitening agents, surfactants, enzyme preparations, plant extracts) into a single integrated laundry sheet formulation. This combination allows the product to perform multiple functions including whitening, washing, and stain removal, while extending shelf life through the stabilizing polymer matrix.
3Quantity of substance
If an undiluted whitening laundry detergent is used to achieve strong whitening effect, then the whitening effect is enhanced, but the whitening agent rapidly adsorbs onto fabrics causing uneven whitening and color spots
Solution Approach 1:
The patent incorporates surfactants and dispersants into the laundry sheet formulation before use, which preliminarily prepare the washing environment by preventing rapid adsorption of whitening agents onto fabric surfaces. This preliminary action ensures uniform distribution and prevents color spots, allowing high concentration whitening to be applied safely.
4Ease of operation
If a fiber cloth carrier is used to bond or adsorb large amount of whitening agent for portability, then the product is convenient to carry, but the whitening agent is prone to falling off and migrating, and the fiber cloth causes local color differences and requires manual disposal
Solution Approach 1:
The patent employs a disposable water-soluble polymer matrix that dissolves completely during washing, eliminating the need for fiber cloth carriers. This disposable approach provides portability while ensuring complete dissolution without residue, preventing migration and elimination issues associated with reusable fiber carriers.
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 laundry sheet provides long-lasting, uniform whitening and effective stain removal without leaving residues, maintaining fabric integrity and stability under various conditions.
Implementation Method 1
a fluorescent whitening agent is wrapped inside the laundry sheet, which can prevent the fluorescent whitening agent from falling off and migrating during product usage
Implementation Method 2
utilizing a water-soluble polymer complex formed by polyvinyl alcohol and polyvinylpyrrolidone to encapsulate the fluorescent whitening agent
Implementation Method 3
the laundry sheet has strong solubility
Implementation Method 4
combined with specific surfactants and plant extracts, ensuring even distribution and enhanced stain removal
Implementation Method 5
an enzyme preparation 0.5-5%
Data Source
AI summary
The present application relates to a technical field of washing products, and, in particular, to a whitening and stain-removing laundry sheet and a preparation method thereof. A whitening and stain-removing laundry sheet includes: a film-forming agent, an anionic surfactant, a nonionic surfactant, a fluorescent whitening agent, an anti-fouling agent, an enzyme preparation, a plant extract, a chelating agent, and an auxiliary; the film-forming agent includes a film-forming agent A and a film-forming agent B; the film-forming agent A is polyvinyl alcohol, and the film-forming agent B is at least one selected from a group consisting of: polyvinylpyrrolidone and a modified polyvinyl alcohol. The whitening and stain-removing laundry sheet of the present application has strong solubility, significant whitening effect on fabrics, and possesses stain-removing ability. The whitening and stain-removing laundry sheet also has advantages of being convenient to carry, easy to use, and leaving no solid residues after use.