Moisture-Resistant Fibrous Substrate with Controlled Disintegration
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Solution Overview
Problem
Existing moisture-resistant wet wipes face challenges in maintaining mechanical stability during use while ensuring disintegration in water to prevent pipe blockages and easy sewage treatment, often requiring aggressive or allergenic substances, and have issues with complex production processes or premature disintegration.
Innovation Solution
A moisture-resistant fiber-containing substrate comprising water-soluble polysaccharides with acid groups, amphoteric amines, and a dampening solution with organic components, which provides mechanical strength and controlled disintegration in water, preventing pipe blockages and simplifying production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high wet strength is used in wet wipes, then mechanical stability during use is improved, but disintegration in water is insufficient leading to pipe blockages
Solution Approach 1:
The invention changes the chemical parameters of the binder by using polysaccharides with acid groups that undergo specific chemical reactions with amines to form water-soluble complexes. This allows the binder to maintain strong adhesion during use but dissolve completely in water, achieving both high wet strength and complete disintegration without pipe blockages
Solution Approach 2:
The invention creates a composite binder system combining polysaccharides with acid groups and amines in specific ratios. This composite material exhibits dual characteristics: strong binding power during application and complete water solubility for disintegration, resolving the contradiction between maintaining strength and enabling breakdown
2Strength
If aggressive substances are added to achieve moisture resistance, then mechanical stability is improved, but allergenic properties increase
Solution Approach 1:
The invention changes from using traditional aggressive crosslinking agents to using naturally occurring polysaccharides with acid groups that form reversible complexes with amines. This chemical parameter change maintains moisture resistance while eliminating allergenic substances, as the binding is based on natural polyelectrolyte complexation rather than aggressive covalent crosslinking
Solution Approach 2:
The invention adopts a disposable binder system based on water-soluble polysaccharide-amine complexes that are designed to dissolve completely after use. This approach uses inexpensive, biodegradable materials that provide temporary moisture resistance during use but dissolve harmlessly in water, avoiding the need for persistent aggressive substances
3Reliability
If complex production processes are used to achieve controlled disintegration, then disintegration control is improved, but manufacturing complexity increases
Solution Approach 1:
The invention achieves controlled disintegration by changing the chemical composition parameters of the binder - specifically the type of polysaccharide, the presence of acid groups, and the amine content. These compositional parameters inherently control disintegration behavior without requiring complex multi-step production processes, simplifying manufacturing while maintaining reliable disintegration control
Solution Approach 2:
The invention extracts the disintegration control function from complex process steps and embeds it directly into the binder's chemical composition. By selecting polysaccharides with specific acid group characteristics and appropriate amine ratios, the disintegration control is built into the material itself rather than requiring separate control mechanisms or complex production procedures
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 substrate maintains mechanical strength during use and disintegrates effectively in water, avoiding pipe blockages and sewage treatment issues, while being produced inexpensively and with fewer allergenic substances, ensuring both functionality and safety.
Implementation Method 1
the at least one binder comprises or consists of at least one polysaccharide which has at least one residue containing acid groups... and at least one amphoteric amine
Implementation Method 2
at least one dampening solution... wherein the at least one dampening solution contains at least one organic component selected from the group consisting of aliphatic alcohols, aliphatic ethers, aliphatic esters, monosaccharides, oligosaccharides
Data Source
AI summary
The present invention relates to a moisture-resistant, fibrous substrate having adjustable moisture and wet strength, wherein the substrate contains fibers, at least one binder, at least one amphoteric amine, and at least one humectant, wherein the at least one binder comprises or consists of at least one polysaccharide having at least one acid-group-containing residue, and wherein the at least one humectant comprises at least one organic component selected from the group consisting of aliphatic alcohols, aliphatic ethers, aliphatic esters, monosaccharides, oligosaccharides, and mixtures thereof, preferably aliphatic alcohols, aliphatic ethers, and mixtures thereof, and furthermore a process for producing the moisture-resistant, fibrous substrate and its use.