Flushable Sanitary Paper Composition for Leak-Safe Dog Waste Handling
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Solution Overview
Problem
Conventional methods for handling dog feces using paper products face issues with water resistance, wet strength, and water dispersibility, leading to leakage and toilet clogging, and rely on non-biodegradable plastic bags that cause environmental pollution.
Innovation Solution
A method for manufacturing sanitary paper with water resistance, wet strength, and water dispersibility by adding alkyl ketene dimer (AKD) and polyamide polyamine-epichlorohydrin (PAE) to the paper raw material, and creping the paper during drying to enhance elasticity, allowing for effective wrapping and disposal of dog feces without plastic bags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional paper products are used for handling dog feces, then they provide basic absorption, but they lack water resistance and wet strength causing leakage
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition of the paper through adding specific additives (alkyl ketene dimer and polyamide polyamine-epichlorohydrin) in controlled amounts. This changes the physical and chemical parameters of the paper to achieve both water resistance and wet strength simultaneously, resolving the contradiction between these two properties.
Solution Approach 2:
The patent creates a composite material by combining conventional paper with specific chemical additives (alkyl ketene dimer and polyamide polyamine-epichlorohydrin). This composite structure provides both the absorption properties of paper and the water resistance and wet strength of the added compounds, resolving the contradiction between basic paper functions and enhanced performance requirements.
2Strength
If paper with high wet strength is used to prevent leakage, then leakage is reduced, but water dispersibility decreases causing toilet clogging
Solution Approach 1:
The patent carefully controls the concentration parameters of wet strength agents (polyamide polyamine-epichlorohydrin at 0.1-1.0 parts by weight per 100 parts paper) to achieve sufficient wet strength while maintaining water dispersibility. This parameter optimization prevents toilet clogging while still providing leakage prevention.
Solution Approach 2:
The patent creates local quality differences by having different regions or aspects of the paper with different properties: the paper structure provides water dispersibility for toilet disposal, while the added compounds provide localized wet strength at critical points to prevent leakage during handling.
3Reliability
If plastic bags are used for disposing dog feces, then water resistance is achieved, but environmental pollution increases due to non-biodegradability
Solution Approach 1:
The patent uses disposable paper products that can be disposed of in toilets, replacing durable plastic bags. The paper is designed to disintegrate in water, providing water resistance during use but eliminating environmental pollution through biodegradable disposal, resolving the contradiction between water resistance and environmental harm.
Solution Approach 2:
The patent converts the traditionally harmful property of paper (lack of water resistance causing leakage) into a benefit by adding compounds that provide water resistance. Simultaneously, it converts the traditionally beneficial property of paper (biodegradability) into an environmental solution by ensuring the modified paper still disperses and decomposes in toilet water, eliminating plastic pollution.
4Ease of operation
If paper is made with sufficient elasticity to wrap feces, then wrapping effectiveness improves, but manufacturing complexity increases
Solution Approach 1:
The patent achieves elasticity by controlling the creping parameter (10-15 crepe/cm) during the drying process. This parameter adjustment provides sufficient wrapping effectiveness without requiring complex manufacturing equipment or processes, resolving the contradiction between operational ease and manufacturing complexity.
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 sanitary paper prevents leakage and toilet clogging while being biodegradable, reducing environmental impact by eliminating the need for non-biodegradable plastic bags and ensuring convenient disposal of dog feces.
Implementation Method 1
performing hydrophilization to impart a sanitary paper with water resistance by adding 1 to 1.5 wt% of an alkyl ketene dimer (AKD: Alkyl Ketene Dimer), which is a neutral sizing agent as an internal sizing
Implementation Method 2
adding 1 to 1.5 wt% of polyamide polyamine-epichlorohydrin (PAE) serving as a wet strength enhancer to the sanitary paper raw material to impart the sanitary paper with wet strength and water dispersibility
Implementation Method 3
creping a sanitary paper thus produced at a rate of 10 to 15 crepe/cm when drying the sanitary paper to impart the sanitary paper with elasticity
Data Source
Figure 1
AI summary
Disclosed is a method of manufacturing a sanitary paper for handling dog feces, the paper having good water resistance, wet strength, elasticity, and water dispersibility, the sanitary paper being used to collect and carry feces to dispose the dog feces in a toilet. Since the sanitary paper manufactured by the disclosed method has water resistance, appropriate wet strength, flexibility, and water dispersibility, the sanitary paper is easy to wrap and sanitarily carry dog feces, and the sanitary paper does not cause the clogging of a toilet when it is disposed therein along with the dog feces.