Bio-Based Composite Insulation Panel With Flame-Retardant Binder
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Solution Overview
Problem
Existing insulation materials, particularly those based on renewable resources, face challenges in achieving low thermal conductivity, mechanical stability, and fire resistance while being environmentally sustainable and recyclable, with limited applicability in external thermal insulation composite systems (ETICS).
Innovation Solution
A composite panel composed of bio-based particulate or rod-shaped natural materials, a thermosetting resin as a binder, and an inorganic flame retardant, with a maximum of 20% replacement by wood chips, achieving a thermal conductivity of up to 50 mW/mK and flame-retardant properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional plastic lumber is used, then it is resistant to rot and insects, but it has poor nail holding strength and is difficult to fasten
Solution Approach 1:
The patent combines wood fibers (natural material) with plastic polymers (synthetic material) to create a composite panel that integrates the rot and insect resistance of plastic with the fastening capability of wood. The wood fiber component provides mechanical interlocking for fasteners while the plastic matrix provides durability and weather resistance.
2Strength
If pressure treated wood is used, then it has good fastening properties, but it contains harmful chemicals that leach into the environment
Solution Approach 1:
The patent uses naturally occurring lignin in wood fibers as a bio-based binder instead of chemical preservatives. The lignin provides adequate binding between wood fibers and plastic while being environmentally benign, eliminating the need for harmful chemical treatments while maintaining structural integrity and fastening properties.
Solution Approach 2:
The patent changes the binding mechanism from chemical preservatives to physical/chemical properties of lignin under controlled processing conditions. By adjusting processing parameters such as temperature, pressure, and mixing ratios, the lignin effectively binds wood fibers to plastic without requiring harmful chemical additives.
3Strength
If composite panels are produced with high wood fiber content, then they have better fastening properties, but they require more complex processing to prevent fiber aggregation
Solution Approach 1:
The patent applies a surface treatment to wood fibers before composite formation to modify their surface properties. This preliminary treatment prevents fiber aggregation during mixing and processing, allowing high wood fiber content to be achieved without requiring complex processing equipment or multi-step procedures to maintain fiber dispersion.
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 composite panel offers low weight, low thermal conductivity, and flame-retardancy, making it suitable for construction insulation and ETICS, with potential for recyclability and reduced environmental impact.
Implementation Method 1
The wood fiber is subjected to a surface treatment that modifies its properties to enhance bonding with the plastic polymer matrix
Implementation Method 2
The wood fiber is mixed with a plastic polymer to form a composite matrix
Implementation Method 3
The composite mixture is then molded into a panel structure
Data Source
AI summary
The present invention relates to a composite panel which contains or consists of at least one bio-based, particulate or rod-shaped natural substance (except wood), at least one duroplastically cured resin as a binder and at least one inorganic flame-retardant agent. The present invention also relates to a method for producing a corresponding composite panel. The present invention also discloses application possibilities of the composite panel according to the invention.