Double-Sided Adhesive Tape Groove Offset for Stretch Release
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Solution Overview
Problem
Conventional double-sided adhesive tapes used in portable information devices break during the releasing process when stretched, leading to incomplete removal and potential damage to components and chassis.
Innovation Solution
The double-sided adhesive tape features non-overlapping grooves on both faces, allowing for smooth release by positioning the grooves so they do not overlap in the thickness direction, preventing breakage during stretching and enabling complete removal without damaging the components or chassis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If double-sided adhesive tape with groove-like dents is used for fixing components, then the tape can be released by stretching, but the tape breaks at the tab along the dents during releasing
Solution Approach 1:
The patent positions the grooves on opposite faces of the tab at different depths along the thickness direction, creating a three-dimensional offset. This dimensional arrangement ensures that when one groove encounters stress during stretching, the other groove at a different depth provides structural support, preventing complete tab failure while maintaining the release function.
2Ease of operation
If the tab is formed by covering adhesive layers with release paper, then the user can hold the tab for stretch release, but the groove-like dents cause breakage during releasing
Solution Approach 1:
By offsetting the grooves in the thickness direction rather than having them align on the same plane, the patent creates a staggered structural arrangement. This three-dimensional positioning allows the tab to flex and deform in multiple directions during stretching, distributing stress away from single weak points and preventing catastrophic failure.
3Strength
If conventional double-sided tape is used to fix exterior and interior components, then component fixation is achieved, but component replacement and maintenance become difficult
Solution Approach 1:
The patent creates a dynamic release mechanism where the offset grooves allow the tab to progressively deform and extend in the stretching direction. This dynamic behavior enables controlled release of the adhesive bonds during component removal, providing sufficient force to separate components without causing sudden failure or damage.
Solution Approach 2:
The patent changes the physical state and geometry of the tab through the offset groove configuration. During normal use, the tab maintains its structural form for strong fixation. During release, the grooves enable the tab to undergo elastic deformation and extension, changing its effective length and flexibility to facilitate component removal.
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
This configuration ensures the tape can be completely removed without breaking, facilitating maintenance and component replacement while maintaining the structural integrity of the device.
Implementation Method 1
an adhesive portion including adhesive layers on a first face and a second face of a substrate, the adhesive portion being configured to adhesively fix between the decorative plate and the outer face
Implementation Method 2
a tab including pieces of release paper covering a part of the adhesive layers on the first face and the second face of the substrate to let a user hold the tab for stretch release of the adhesive portion
Data Source
AI summary
A portable information device includes: a chassis; a decorative plate fixed to a part of an outer face of the chassis with stretch releasable double-sided adhesive tape; and a cover member that covers the outer face and the decorative plate. The double-sided adhesive tape has: an adhesive portion including adhesive layers on first and second faces of a substrate for adhesively fixing between the decorative plate and the outer face; and a tab including release paper partially covering the adhesive layers to let a user hold the tab for stretch release of the adhesive portion from between the decorative plate and the outer face. The double-sided adhesive tape has a first groove and a second groove on the first face and the second face, respectively, that are positioned not to overlap in a thickness direction of the substrate.