Composite Panel Adhesive Layer Bonding
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Solution Overview
Problem
Existing composite panels with high flexural modulus of elasticity require long pressing times, making their production complex and inefficient.
Innovation Solution
A composite panel design featuring a middle layer of chipboard with synthetic resin-impregnated paper between the outer layers, where an adhesive layer is applied between the synthetic resin-impregnated paper and the outer layer to accelerate hardening and reduce pressing time, allowing for shorter pressing cycles without compromising flexural modulus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer layer is bonded to the core layer using resin-impregnated paper, then the panel achieves high flexural modulus, but the pressing time becomes excessively long
Solution Approach 1:
The patent divides the bonding system into two separate functional layers: a resin-impregnated paper layer that bonds to the core layer, and a separate outer layer that is applied afterward. This segmentation allows the resin to cure and bond the core without the outer layer present, achieving high flexural modulus through proper resin bonding while eliminating the time penalty of bonding all layers simultaneously
Solution Approach 2:
The resin-impregnated paper is prepared in advance and bonded to the core layer before the outer layer is applied. This preliminary bonding action allows the resin to begin curing and establish strong adhesion to the core layer without the outer layer interfering, thereby achieving high strength properties while reducing total pressing time
2Stability of the object's composition
If the outer layer is present during resin curing, then the panel structure is complete, but the resin curing process is significantly delayed
Solution Approach 1:
The patent separates the structural bonding function from the final panel assembly. The resin-impregnated paper performs the structural bonding function by curing and adhering to the core layer, while the outer layer is applied as a separate subsequent step. This segmentation eliminates the harmful effect of the outer layer delaying resin curing while still achieving complete panel structure
Solution Approach 2:
The resin-impregnated paper acts as an intermediary layer between the core layer and the outer layer. It enables the core layer to bond effectively without the outer layer present during curing, while still providing the interface for subsequent outer layer application. This intermediary function resolves the contradiction between complete structure and curing speed
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 pressing time by 80-90% while maintaining the panel's strength properties, as the synthetic resin-impregnated paper forms a strong bond with the chipboard, and the outer layer's adhesive lamination does not affect the panel's flexural modulus, enabling efficient production with improved edge strength and dimensional stability.
Implementation Method 1
The curing of the resin in the resin-impregnated paper, and thus the bonding of the core layer to the resin-impregnated paper, occurs significantly faster when the core layer and the resin-impregnated paper are pressed without the outer layer
Implementation Method 2
The adhesive layer is applied either to the outside of the resin-impregnated paper or to the side of the outer layer facing the paper, thereby fixing the outer layer to the composite of the core layer and the resin-impregnated paper
Data Source
Figure 1
AI summary
The invention relates to a composite panel made of wood-based material with a core layer of particleboard and a fiberboard or laminated panel as an outer layer, as well as with a resin-impregnated paper arranged between the core and outer layers. To produce a composite panel with high flexural strength in a simple manner, particularly with shorter pressing times, it is provided that a layer of adhesive is arranged between the resin-impregnated paper and the outer layer.