Wax-Reinforced Pulp Composition for Strength and Liquid Repellency
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Solution Overview
Problem
Existing pulp compositions do not adequately address the need for improved strength, liquid repellency, and recyclability of pulp formed articles, particularly in the absence of fluorine-containing compounds.
Innovation Solution
A pulp composition comprising pulp, wax, and a paper strength agent, with specific ranges of wax and paper strength agent content, providing excellent strength, liquid repellency, and recyclability, while avoiding fluorine compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If fluorine-containing compounds are used to achieve liquid repellency, then liquid repellency is improved, but environmental safety and recyclability deteriorate
Solution Approach 1:
The patent extracts and eliminates fluorine-containing compounds from the pulp composition while maintaining liquid repellency through alternative substances. Specifically, it uses waxes (0.2-10.0% by weight) and paper strength agents (0.1-1.1% polyacrylamide, 0.6-5.0% polysaccharide, or 0.3-0.9% polyamide by weight) to achieve the desired liquid repellent effect without the harmful environmental and recyclability issues associated with fluorine compounds.
Solution Approach 2:
The patent changes the chemical composition parameters by specifying precise weight ratios of alternative substances. It defines the wax content as 0.2-10.0% by weight based on pulp weight and the paper strength agent content as specific ranges (0.1-1.1% polyacrylamide, 0.6-5.0% polysaccharide, or 0.3-0.9% polyamide), thereby achieving liquid repellency through parameter optimization rather than using fluorine compounds.
2Object-affected harmful factors
If wax content is increased to improve liquid repellency, then liquid repellency is improved, but paper strength deteriorates
Solution Approach 1:
The patent merges the functions of liquid repellency and paper strengthening by combining wax with paper strength agents in a specific formulation. The wax (0.2-10.0% by weight) provides liquid repellency while the paper strength agent (0.1-1.1% polyacrylamide, 0.6-5.0% polysaccharide, or 0.3-0.9% polyamide by weight) maintains or enhances paper strength, allowing both functions to work synergistically rather than antagonistically.
Solution Approach 2:
The patent creates a composite material system consisting of pulp, wax, and paper strength agent. This composite approach allows the wax to provide liquid repellency while the paper strength agent compensates for any potential strength reduction, achieving a balanced formulation where both liquid repellency and paper strength are optimized simultaneously through the interaction of multiple materials.
3Strength
If paper strength agent amount is increased to improve paper strength, then paper strength is improved, but manufacturing cost increases
Solution Approach 1:
The patent optimizes the concentration parameters of paper strength agents to achieve cost-effective paper strength enhancement. It specifies narrow ranges: 0.1-1.1% polyacrylamide, 0.6-5.0% polysaccharide, or 0.3-0.9% polyamide by weight based on pulp weight. These optimized parameters ensure sufficient paper strength is achieved at minimal dosage, avoiding excessive use and associated cost increases while maintaining the required performance level.
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 composition achieves enhanced strength and liquid repellency in pulp formed articles, with improved recyclability and without the use of fluorine-containing compounds.
Implementation Method 1
a wax and an oil resistant agent for pulp
Implementation Method 2
the pulp composition comprises pulp, a wax and a paper strength agent
Data Source
AI summary
The present disclosure provides a novel pulp composition with which it is possible to produce a pulp molded article that has improved strength. The pulp composition contains pulp, wax, and a paper strengthening agent. The paper strengthening agent includes a polyacrylamide-based paper strengthening agent, a polysaccharide-based paper strengthening agent, and/or a polyamide-based paper strengthening agent. The amount of the wax is 0.2% to 10.0% by weight inclusive with respect to the pulp. The pulp composition satisfies at least one of the following requirements (1) to (3). (1) The amount of the polyacrylamide-based paper strengthening agent is 0.1% to 1.1% by weight inclusive with respect to the pulp. (2) The amount of the polysaccharide-based paper strengthening agent is 0.6% to 5.0% by weight inclusive with respect to the pulp. (3) The amount of the polyamide-based paper strengthening agent is 0.3% to 0.9% by weight inclusive with respect to the pulp.