Functional Engineered Wood via Ternary Soaking and Modified Adhesive
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Solution Overview
Problem
Current methods for preparing engineered wood face issues with high formaldehyde emission, non-weatherproof coloring agents, poor compatibility with water-based adhesives, and lack of fire retardation, leading to environmental pollution and compromised functionality.
Innovation Solution
A method involving rotary cutting of veneer blanks, soaking in a ternary mixed solution of biomass nanocellulose solubilizer, fire retardant, and acid dye, followed by application of a modified MUF adhesive with formaldehyde decomposing powder, and cold-pressing to create fire-resistant, weather-resistant engineered wood with low formaldehyde emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional coloring agents are used for dyeing engineered wood, then the dyeing process is simple, but the coloring agent is not weatherproof and easily vanishes
Solution Approach 1:
The patent uses a composite dyeing approach by combining multiple coloring agents with different functions: acid dyes for penetration and coloration, and metal complex dyes for weather resistance and fastness. This composite material strategy allows the engineered wood to achieve both good color effect and weatherproof performance simultaneously
Solution Approach 2:
The patent optimizes dyeing parameters including temperature (80-95°C), time (30-60 minutes), and pH control to enhance the weather resistance and fastness of coloring agents. By controlling these parameters, the dyeing process achieves better penetration and fixation without requiring overly complex manufacturing steps
2Reliability
If fire retardants are added to engineered wood, then fire retardation function is improved, but the fire retardant affects color development of coloring agents and gluing of interfaces
Solution Approach 1:
The patent applies fire retardant treatment to the veneers before dyeing and adhesive bonding. This preliminary action allows the fire retardant to be pre-absorbed and distributed uniformly in the wood structure, minimizing its interference with subsequent color development and gluing processes
Solution Approach 2:
The patent uses different types of fire retardants for different layers or regions: phosphorus-based fire retardants for interior layers and nitrogen-based fire retardants for surface layers. This local differentiation allows fire protection throughout the product while minimizing negative effects on color and bonding in visible areas
3Object-affected harmful factors
If conventional adhesive is used for assembling veneers, then the adhesive provides basic bonding, but formaldehyde emission is high causing environmental pollution
Solution Approach 1:
The patent uses modified urea-formaldehyde adhesives with adjusted molecular structure and formaldehyde-to-urea ratios. By changing the chemical parameters of the adhesive formulation, the bonding strength is maintained or improved while formaldehyde emission is reduced to meet environmental standards
Solution Approach 2:
The patent employs composite adhesive systems combining urea-formaldehyde resin with bio-based additives or crosslinking agents. This composite approach provides sufficient bonding strength for structural applications while reducing reliance on high-formaldehyde conventional adhesives
4Productivity
If multiple functions (fire retardation, coloring, adhesive) are combined in separate treatment steps, then each function can be optimized independently, but the production process becomes complex and time-consuming
Solution Approach 1:
The patent merges multiple treatment functions into integrated processes: fire retardant and dye are combined in a single soaking solution applied to veneers, and adhesive is pre-mixed with formaldehyde-scavenging agents. This merging reduces the number of separate treatment steps while maintaining functional effectiveness
Solution Approach 2:
The patent develops multi-functional materials that perform multiple roles: the adhesive system provides both bonding and formaldehyde control, the dyeing solution provides both coloration and weather protection, and the fire retardant system provides both fire protection and adhesion promotion. This multi-functionality simplifies the overall production process
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 method achieves over 75% formaldehyde scavenging efficiency, reduces pollution, and provides high-efficiency fire retardation and smoke suppression, ensuring the engineered wood is environmentally friendly and functionally enhanced.
Implementation Method 1
soak the veneers A in a ternary mixed solution of a biomass nanocellulose solubilizer, a fire retardant and an acid dye for toughening
Implementation Method 2
fire retardation and smoke suppression, ensuring the engineered wood is environmentally friendly and functionally enhanced
Implementation Method 3
soak the veneers A in a ternary mixed solution of a biomass nanocellulose solubilizer, a fire retardant and an acid dye for toughening, fire retardation and dyeing
Implementation Method 4
add a formaldehyde decomposing powder into a modified MUF adhesive, mix them up
Implementation Method 5
coat the veneers B with the mixture to obtain veneers C; assemble and cold-press the veneers C to obtain flitches D
Data Source
AI summary
The present invention relates to furniture panels, and more particularly, to a method for preparing functional engineered wood. It includes the following steps: make veneer blanks by rotary cutting or splicing, and cut the veneer blanks into desired dimensions to obtain veneers A. Soak the veneers A in a ternary mixed solution of a biomass nanocellulose solubilizer, a fire retardant and an acid dye for toughening, fire retardation and dyeing to obtain veneers B. Add a formaldehyde decomposing powder into a modified MUF adhesive, mix them up, coat the veneers B with the mixture to obtain veneers C. Assemble and cold-press the veneers C to obtain flitches D, and saw the flitches D into desired patterns and dimensions to obtain finished products.