Discontinuous Adhesive Textile for Low-Stretch Insulation
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Solution Overview
Problem
Existing discontinuous coatings on textiles fail to enhance surface texture and thermal insulation significantly without increasing weight and reducing flexibility, and they also increase the stretch force required to stretch the textile.
Innovation Solution
A multi-layered article with a textile and an adhesive layer featuring discontinuous adhesive regions and non-adhesive regions, where the adhesive regions have a distinctive shape and contain adhesive dots, allowing for a lower stretch force and improved insulation while maintaining flexibility and low weight, achieved through a method involving tensioning, adhesive application, and relaxation to create a curled surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a thick coating is applied to increase surface texture, then surface texture is improved, but weight increases and flexibility decreases
Solution Approach 1:
The adhesive coating is segmented into discontinuous regions and adhesive dots rather than a continuous thick layer. This segmentation allows surface texturization through localized adhesive application while minimizing overall coating thickness, thereby reducing weight while maintaining flexibility.
Solution Approach 2:
The adhesive is applied with varying local density and distribution - concentrated in specific regions and as discrete dots rather than uniformly distributed. This local quality variation creates surface texture and aesthetic interest without requiring uniform thick coating across the entire textile surface, thus avoiding excessive weight gain.
2Temperature
If a thick coating is applied to increase thermal insulation, then thermal resistance is improved, but weight increases and flexibility decreases
Solution Approach 1:
The thermal insulation function is achieved through segmented adhesive regions rather than a continuous thick layer. The discontinuous adhesive application creates localized thermal barriers that provide insulation while minimizing overall material usage and weight.
Solution Approach 2:
The adhesive coating transitions from a two-dimensional continuous layer to a three-dimensional discontinuous structure with varying thickness and distribution. This dimensional change allows thermal insulation through strategic placement of adhesive material rather than uniform coverage, reducing overall weight while maintaining insulative properties.
3Shape
If a discontinuous coating is applied to provide surface texture, then aesthetic interest is improved, but stretch force increases
Solution Approach 1:
The coating is segmented into discrete adhesive dots and regions separated by non-adhesive areas. This segmentation allows the textile to stretch more easily because the discontinuous adhesive structure does not uniformly constrain the textile fibers during deformation, reducing the overall stretch force required.
Solution Approach 2:
The adhesive is concentrated in specific local regions rather than uniformly distributed. This local quality creates surface texture and aesthetic interest in bonded areas while leaving non-adhesive regions that facilitate easier stretching and movement, thereby reducing the force required to deform the textile.
Data Source
Figure 1
Figure 2
Figure 2A
AI summary
Multi-layered articles that include a first textile and an adhesive layer having a non-uniform adhesive pattern is provided. The non-uniform adhesive pattern creates regions free or substantially free of adhesive. The adhesive regions, together with the non-adhesive regions, create a visible pattern on the surface of the article. A second textile may optionally be bonded to the adhesive opposing the first textile to form a multi-layered article. The first textile or adhesive layer may be shrinkable or expandable. Additionally, the multi-layered article has a stretch force at 20% elongation of less than three times the stretch force of the first textile at 20% elongation. The multi-layered articles are breathable, insulative, aesthetically pleasing, and demonstrate superior stretch and recovery properties.