Waterproof Membrane Laminate with Segmented Adhesive Layer
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Solution Overview
Problem
Existing waterproof air-permeable and sound-transmitting membranes have limited flexibility in shape and method of joining, and are often supplied in fixed forms that hinder their adaptability and storage efficiency.
Innovation Solution
A laminate comprising a resin film and a separator joined by an adhesive layer, allowing the resin film to be supplied in various shapes and forms, including rolls, with the peel surface positioned between the resin film and the adhesive layer, enabling flexible joining methods and improved storage and transportability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the waterproof membrane is supplied with adhesive layer formed on one principal surface and separator covering the adhesive layer, then the membrane can be stored and transported in roll form, but the joining method and shape are limited to predetermined forms
Solution Approach 1:
The laminate is segmented into three distinct layers: resin film, adhesive layer, and separator. This segmentation allows each layer to perform its specific function independently, enabling the resin film to be supplied in various shapes and forms without being constrained by a fixed adhesive layer configuration. The separator can be peeled off to reveal the adhesive layer for joining operations.
Solution Approach 2:
The adhesive layer is extracted from the conventional configuration where it is covered by separator during storage, and instead positioned between the resin film and separator. This extraction allows the adhesive layer to be applied directly to the resin film surface, providing flexibility in shaping the resin film before adhesive application, while still maintaining the protective separator covering during storage and transport.
2Reliability
If the adhesive layer is formed on the waterproof membrane surface, then the membrane can be joined to housing openings, but air permeability and sound transmissivity are decreased in the adhesive area
Solution Approach 1:
The adhesive layer is applied locally to specific areas of the resin film rather than covering the entire surface. This local application ensures reliable joining at the adhesive locations while maintaining the air permeability and sound transmissivity properties of the resin film in non-adhesive areas. The separator covers only the adhesive layer area, protecting it during storage without affecting the overall performance of the membrane.
3Adaptability or versatility
If the separator covers the adhesive layer during storage, then unexpected adhesion is prevented, but the resin film has limited flexibility in shaping before joining
Solution Approach 1:
The adhesive layer is applied to the resin film surface in advance, before the resin film is shaped and joined to the housing opening. The separator is then placed over the adhesive layer to prevent contamination and unexpected adhesion. This preliminary action sequence allows the resin film to be shaped freely after adhesive application but before separator removal, providing both shaping flexibility and adhesion prevention.
Solution Approach 2:
The separator acts as an intermediary protective layer between the adhesive layer and the external environment during storage and transport. It prevents unintended adhesion while allowing the adhesive layer to remain active and effective when the separator is peeled off at the time of use. The separator's releasing treatment ensures easy peeling without damaging the adhesive layer or resin film.
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 laminate provides a highly flexible resin film that can function as a waterproof air-permeable or sound-transmitting membrane, allowing for arbitrary shaping and joining, while maintaining air permeability and sound transmissivity, and preventing adhesive residue and winding failures.
Implementation Method 1
the resin film and the separator are joined to each other by an adhesive layer
Data Source
Figure 1~2
Figure 3A~3B
Figure 4A~5
AI summary
A laminate of the present disclosure is a laminate including: a resin film that can function as a waterproof air-permeable membrane and/or a waterproof sound-transmitting membrane; and a separator. The resin film and the separator are joined to each other by an adhesive layer. A peel surface formed when the separator is peeled from the resin film is positioned between the resin film and the adhesive layer. The laminate of the present disclosure can supply the resin film that can function as a waterproof air-permeable membrane and/or a waterproof sound-transmitting membrane in a state of being highly flexible in terms of shape and method of joining to an opening of a housing. The laminate of the present disclosure can be supplied also in the form of a roll with excellent storage property, transportability, etc.