Cover Member Laminated Substrate Peelability
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Solution Overview
Problem
Existing cover members have low peelability from member supply sheets, leading to potential damage to protective membranes during peeling, especially when these membranes have high air permeability.
Innovation Solution
A cover member with a first substrate layer having a laminated structure of non-foam and foam films is used, positioned between the protective membrane and the face when placed on an object, enhancing peelability by allowing moderate deformation during peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single-layer substrate is used in the cover member, then the structure is simple and manufacturing is easy, but the peelability from the member supply sheet is poor and the protective membrane may be damaged during peeling
Solution Approach 1:
The substrate layer is divided into multiple layers with different properties: a first substrate layer (non-foam film) that provides rigidity and force transmission, and a second substrate layer (foam film) that provides flexibility and deformation absorption. This segmentation allows each layer to perform its specific function, improving peelability without causing damage to the protective membrane.
Solution Approach 2:
The invention uses a composite substrate structure combining non-foam film and foam film materials. The non-foam film provides structural rigidity and efficient force transmission, while the foam film provides flexibility and allows moderate deformation. This composite material approach resolves the contradiction by integrating materials with complementary properties.
2Productivity
If a rigid substrate is used to transmit peeling force efficiently, then peeling effectiveness is improved, but excessive force concentration may damage the protective membrane
Solution Approach 1:
The substrate is segmented into two functional layers: the first substrate layer (non-foam) handles force transmission efficiency, while the second substrate layer (foam) handles force distribution and deformation absorption. This segmentation prevents excessive force concentration on the protective membrane while maintaining peeling efficiency.
Solution Approach 2:
Different regions of the substrate have different mechanical properties tailored to their specific functions. The non-foam film region provides rigidity for force transmission, while the foam film region provides flexibility for deformation absorption. This local quality differentiation allows the system to achieve both peeling efficiency and membrane integrity.
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 cover member achieves improved peelability from the member supply sheet without damaging the protective membrane, even when it has high air permeability, ensuring efficient placement on objects.
Implementation Method 1
a foam film that is relatively flexible and allows moderate deformation of the first substrate layer positioned on the member supply sheet side
Data Source
AI summary
A cover member of the present invention is a cover member to be placed on a face of an object to prevent passage of a foreign matter through an opening of the face, the cover member including: a protective membrane having a shape configured to cover the opening when the cover member is placed on the face; and a first substrate layer joined to one of principal surfaces of the protective membrane. The first substrate layer has a laminated structure including at least two substrate films, and is positioned between the protective membrane and the face when the cover member is placed on the face. The at least two substrate films include a non-foam film and a foam film. The cover member of the present invention is suitable for improving the peelability from a member supply sheet.