Laminate Adhesive Distribution for Bonding and Ventilation
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Solution Overview
Problem
In laminates where multiple sheets are bonded using an adhesive, insufficient adhesive leads to peeling between sheets, while excessive adhesive worsens ventilation and increases pressure loss.
Innovation Solution
A laminate design where the adhesive is strategically distributed in linear regions along the edges and center, with a higher mass per unit area at the edges to enhance bonding strength and reduce peeling, while minimizing overall adhesive usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is uniformly distributed across the entire laminate surface, then bonding strength is improved, but ventilation is worsened and pressure loss increases
Solution Approach 1:
The adhesive is applied non-uniformly with higher concentration at edge portions and lower concentration at central portions. This local quality variation ensures strong bonding at edges where peeling is most likely to occur, while minimizing adhesive in the center to maintain ventilation and reduce pressure loss.
Solution Approach 2:
The laminate surface is divided into different regions (edge portions and central portions) with different adhesive application densities. This segmentation allows optimized bonding strength in critical areas while maintaining breathability in less critical areas.
2Strength
If adhesive amount is increased to prevent peeling, then bonding strength is improved, but ventilation is worsened
Solution Approach 1:
Different regions of the laminate have different adhesive quantities tailored to their specific needs. Edge portions receive more adhesive for peeling prevention, while central portions receive less adhesive to maintain ventilation performance.
3Reliability
If adhesive is applied at edge portions with higher mass per unit area, then peeling resistance is improved, but adhesive usage increases
Solution Approach 1:
Adhesive is concentrated at edge portions where peeling resistance is most critical, rather than uniformly distributing it across the entire surface. This targeted approach improves peeling resistance while minimizing total adhesive consumption.
Solution Approach 2:
Instead of applying moderate adhesive uniformly across the entire surface, the invention applies excessive adhesive locally at edge portions where it is most needed, while applying minimal or no adhesive in the center, achieving better overall performance with reduced total adhesive usage.
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 effectively suppresses peeling between sheets, maintains ventilation, and reduces pressure loss, achieving improved bonding strength and efficiency.
Implementation Method 1
an adhesive disposed between the first sheet and the second sheet
Data Source
AI summary
A laminate includes a first sheet containing first fibers, a second sheet laminated on the first sheet and containing second fibers, and an adhesive disposed between the first sheet and the second sheet. At least a part of the adhesive is disposed in an end portion along the edge side of the laminate so as to form a linear first region, and the first sheet is adhered to the second sheet via the first region. Alternatively, a mass per unit area of the adhesive present in an end portion along an edge side of the laminate is larger than a mass per unit area of the adhesive present in a portion near a central part of the laminate rather than the end portion.