Stretchable Composite Sheet With Regular Ridges
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Solution Overview
Problem
Conventional stretch sheet materials often fail to maintain visually appealing creases due to irregularity in shape and poor shape retention, and their production involves costly discrete bonding processes.
Innovation Solution
A stretchable composite sheet is created by bonding a stretch sheet with alternating zones of high and low elastic stretchability to a nonstretch sheet using a continuous adhesive, ensuring the formation of regular ridges that maintain shape and ease of production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If discrete bonding of stretch sheet and nonstretch sheet is used, then shape retention of creases is improved, but production cost increases due to equipment requirements
Solution Approach 1:
The patent replaces the mechanical discrete bonding system with a chemical adhesive bonding system. The adhesive layer chemically bonds the stretch sheet and nonstretch sheet together, eliminating the need for complex bonding equipment while maintaining the structural integrity and crease shape retention required for stretch sheet functionality.
Solution Approach 2:
The patent introduces an adhesive layer as an intermediary substance between the stretch sheet and nonstretch sheet. This adhesive mediator enables bonding without requiring direct mechanical connection, simplifying the manufacturing process while ensuring proper shape retention of creases through effective adhesion.
2Ease of manufacture
If irregular crease shapes are formed, then production simplicity is maintained, but visual attractiveness of ridges deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the stretch ratio, adhesive properties, and material characteristics to transform irregular crease shapes into regular, visually attractive ridges. By adjusting these parameters during the stretching process, the invention achieves both aesthetic appeal and manufacturing simplicity.
Solution Approach 2:
The patent employs preliminary action by pre-planning and pre-setting the stretching parameters and adhesive application patterns before the actual stretching process. This preliminary preparation ensures that regular, attractive ridges form naturally during stretching without requiring complex real-time control or post-processing.
3Ease of manufacture
If continuous adhesive bonding is used, then production cost decreases, but manufacturing precision of regular ridges must be maintained
Solution Approach 1:
The patent uses parameter changes by optimizing adhesive viscosity, application rate, and stretching speed to ensure that continuous adhesive bonding produces regular, precise ridges. By carefully controlling these parameters, the invention maintains manufacturing precision while benefiting from the cost advantages of continuous bonding processes.
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 solution results in a composite sheet with regular, attractive ridges that provide excellent cushioning and breathability, while reducing production costs and improving manufacturing efficiency.
Implementation Method 1
bonding a stretch sheet with alternating zones of high and low elastic stretchability to a nonstretch sheet using a continuous adhesive
Implementation Method 2
stretch sheet with alternating zones of high and low elastic stretchability
Implementation Method 3
formation of regular ridges that maintain shape
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A stretchable composite sheet having a number of ridges in a neat and orderly arrangement is disclosed. The stretchable composite sheet is easily produced by the process of the invention. The stretchable composite sheet is a laminate of a stretch sheet 10 and a nonstretch sheet 2. The stretch sheet 10 has first zones 14 having elastic stretchability and second zones 15 having less stretchability than the first zones 14. The first zones 14 and the second zones 15 extend in the same direction and alternate with each other. The stretch sheet 10 and the nonstretch sheet 2 are bonded over substantially the entire area of their facing sides. The stretchable composite sheet has a large number of ridges 3 on the side of the nonstretch sheet.