Breathable Fabric Lamination Using Patterned Adhesive and Napped Fibers
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Solution Overview
Problem
Existing breathable fabric laminates used in medical and sports applications, such as straps and braces, often have poor air permeability, leading to moisture retention and potential skin issues like bacteria growth and odor, due to the use of non-breathable materials like Neoprene polychloroprene and inexpensive tricot knit fabrics.
Innovation Solution
A breathable fabric laminate is formed by raising the surface fibers of at least one fabric through brushing or napping and adhesively bonding it with another fabric, creating a laminate with increased thickness and air permeability, using a pattern of adhesive that covers no more than 70% of the surface, allowing for better ventilation and moisture transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Neoprene polychloroprene and tricot knit fabrics are used for comfort and stretch, then comfort and stretchability are improved, but air permeability deteriorates leading to moisture retention and skin issues
Solution Approach 1:
The laminate is divided into multiple fabric layers (first fabric layer, second fabric layer, third fabric layer) with distinct functions. The first layer provides comfort and stretch, the second layer provides breathability and moisture management, and the third layer provides hook engagement. This segmentation allows each layer to optimize its specific function without compromising overall performance.
Solution Approach 2:
The invention uses a composite laminate structure combining different fabric types (knit fabrics, spacer fabrics, mesh fabrics) with complementary properties. The combination of materials with different breathability, stretch, and comfort characteristics creates a synergistic effect that resolves the contradiction between comfort and air permeability.
2Ease of operation
If foam or Neoprene polychloroprene is laminated to add comfort and stretch, then comfort and compressibility are improved, but air permeability deteriorates
Solution Approach 1:
The invention replaces solid foam and Neoprene polychloroprene layers with porous spacer fabrics and mesh fabrics that have inherent air-permeable structures. These materials contain voids, channels, and open spaces that allow air and moisture to pass through while still providing cushioning, compression, and thermal insulation properties similar to foam materials.
3Strength
If adhesive is applied to bond fabric layers, then bonding strength is improved, but air permeability deteriorates due to adhesive blocking pores
Solution Approach 1:
Adhesive is applied selectively only to specific regions of the fabric layers rather than uniformly across the entire surface. The adhesive is concentrated at edge regions or specific bonding zones, leaving the central breathable regions of the spacer and mesh fabrics free of adhesive. This partial application maintains bonding strength where needed while preserving air permeability in the functional breathing zones.
Solution Approach 2:
Different regions of the laminate have different adhesive applications: edge regions have adhesive for structural bonding, while central regions have no adhesive to maintain breathability. This local differentiation of adhesive quality allows the laminate to simultaneously achieve strong bonding and high air permeability in different areas.
4Ease of operation
If fabric thickness is increased to improve comfort and spacing, then comfort and moisture management are improved, but laminate overall thickness increases
Solution Approach 1:
The invention uses thin spacer fabrics and mesh fabrics that provide disproportionate comfort, cushioning, and breathability relative to their thickness. These thin breathable layers replace thicker foam materials, achieving similar comfort functions with reduced overall laminate thickness. The spacer construction provides three-dimensional air gaps that enhance comfort without adding significant thickness.
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 resulting laminate provides enhanced air permeability, comfort, and bacteria resistance, reducing the risk of skin infections while maintaining strength and durability, potentially eliminating the need for additional foam layers.
Implementation Method 1
adhesively bonding the first fabric layer and the second fabric layer to one another
Data Source
AI summary
A breathable fabric laminate is formed from fabrics of differing properties, by selecting respective faces of each of two fibrous fabrics to be adhesively joined across the selected faces, raising surface fibers of at least one of the selected faces by brushing or napping the surface fibers, applying a pattern of adhesive to at least one of the selected faces, the pattern including areas of adhesive and adhesive-free areas, and then joining the selected faces to form a fabric laminate. Napping or brushing the back sides of the fabrics prior to lamination creates a spacing layer that can increase air permeability and overall laminate thickness.