Composite Board Aqueous Protein Dispersion Tool Wear
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Solution Overview
Problem
Current composite board manufacturing processes face challenges with tool wear and edge quality during machining, particularly with lignocellulosic composites made using pMDI binders, which result in difficult machining and quality defects.
Innovation Solution
The process involves adding an aqueous protein and diluent dispersion, comprising starch, sugar, and soy flour, to a lignocellulosic mixture, along with an adhesive or binder like pMDI, to form a composite mixture that is then pressed and cured, reducing tool wear and improving edge quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pMDI binder is used in composite board manufacture, then bonding performance is improved, but tool wear and machining difficulty increase significantly
Solution Approach 1:
An aqueous dispersion containing protein (soy flour), starch, and sugar is introduced as an intermediary substance between the pMDI binder and the lignocellulosic material. This intermediary layer modifies the surface properties of the composite board, reducing direct interaction between the pMDI binder and cutting tools, thereby decreasing tool wear while preserving the bonding performance provided by pMDI.
2Strength
If pMDI binder is used in composite board manufacture, then bonding performance is improved, but edge quality and surface defects worsen
Solution Approach 1:
The aqueous dispersion acts as a mediator that modifies the surface characteristics of the composite board. The protein, starch, and sugar components create a surface layer that improves edge quality and reduces surface defects during machining, while allowing the pMDI binder to maintain its bonding performance in the bulk material.
3Reliability
If phenol-formaldehyde resin is used as adhesive, then durability and cost are improved, but press time increases and thickness swell increases
Solution Approach 1:
The aqueous dispersion containing protein, starch, and sugar modifies the chemical and physical parameters of the adhesive system. This composition change enables faster curing kinetics and reduced thickness swell while maintaining the durability characteristics of phenol-formaldehyde resins, thereby reducing press time without sacrificing reliability.
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
This approach significantly reduces tool and blade wear by at least 10% to 65% while maintaining acceptable physical and quality standards of the final composite board product.
Implementation Method 1
adding an adhesive, binder and/or curative as an additive for reducing tool and blade wear in manufacturing a lignocellulosic composite board
Data Source
AI summary
The invention is directed to a process for the manufacture of composite wood structures, which provides for increased production rates and machinability. More particularly, the process comprises combining wood particles with a composition comprising an aqueous protein and diluent dispersion.