Patch Release Sheet with Segmented Precut Patterns
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Solution Overview
Problem
Conventional patches with adhesive masses and release sheets are difficult for aged individuals to apply and remove, as the release sheets often require complex detachment methods, leading to usability issues and increased risk of creasing or sticking.
Innovation Solution
A patch design featuring a release sheet with pre-cut parts near the division zone, arranged in patterns such as S-shaped, wavy, zigzag, or T-shaped, allowing for easy separation by pulling, which exposes the adhesive mass for direct application without shifting the patch between hands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pull tab part is formed on the release sheet to enable easy detachment, then the ease of operation is improved, but the device complexity increases and manufacturing cost increases
Solution Approach 1:
The release sheet is divided into multiple detached pieces by forming cut parts that extend from the division zone toward the edge. This segmentation allows the release sheet to be easily separated into manageable portions without requiring additional pull tabs or complex detachment mechanisms, thus improving ease of operation while maintaining simple structure.
Solution Approach 2:
Cut parts are pre-formed on the release sheet during manufacturing, creating predetermined separation zones that guide the detachment process. These pre-formed cut lines enable users to easily separate the release sheet into multiple pieces by simply pulling along the cut lines, eliminating the need for additional detachment aids while simplifying the overall structure.
2Ease of operation
If the release sheet is made rigid to enable detachment by bending, then the ease of operation is improved, but the adaptability is reduced due to material restrictions
Solution Approach 1:
Instead of requiring the entire release sheet to be rigid for bending-based detachment, the invention segments the release sheet into multiple detached pieces through pre-formed cut parts. This allows the use of more flexible materials that can still be easily separated into sections, expanding material selection flexibility while maintaining ease of detachment operation.
Solution Approach 2:
The release sheet has different structural properties in different regions: the cut parts create localized separation zones that facilitate detachment, while the remaining portions can maintain appropriate flexibility. This local differentiation allows the use of flexible materials overall while providing rigid-like detachment characteristics only where needed at the cut lines.
3Ease of operation
If the release sheet is divided into multiple pieces by pulling apart, then the ease of operation is improved, but the release sheet may re-stick to the adhesive mass
Solution Approach 1:
The invention extracts or removes the problematic full-release-sheet structure and replaces it with multiple smaller detached pieces. By dividing the release sheet into separate sections through pre-formed cut parts, the surface area in contact with the adhesive mass is reduced and controlled, minimizing the risk of re-sticking while maintaining easy detachment operation.
Solution Approach 2:
The release sheet is segmented into multiple detached pieces that can be separated and removed individually. This segmentation reduces the total adhesive contact area and allows progressive removal, preventing the entire release sheet from re-sticking to the adhesive mass while maintaining ease of operation during detachment.
4Ease of operation
If a precut part is opened when the patch is pulled apart, then the ease of operation is improved for clean separation, but the manufacturing precision requirements increase
Solution Approach 1:
The cut parts are pre-formed during manufacturing with predetermined positions and patterns. These pre-formed features guide the detachment process and ensure clean separation along intended lines, improving ease of operation. The preliminary formation of cut parts at standardized positions reduces the complexity of precise positioning requirements compared to arbitrary cut lines.
Solution Approach 2:
The precut parts are localized to specific regions near the division zone rather than requiring precision across the entire release sheet. This localized approach concentrates manufacturing precision requirements to specific areas, making the overall manufacturing process more feasible while still achieving clean separation where it matters most for detachment.
Data Source
AI summary
A patch permitting division of only its release sheet by simply pulling right and left, wherein detachment of the release sheet is easy. There is provided a patch comprising a stretchable support, a plaster applied substantially all over one major surface of the support and a release sheet attached to the whole surface of the plaster wherein only the release sheet is divided at a division zone by simply pulling right and left, and wherein one or two or more precut parts that open when the patch is pulled right and left are disposed in the neighborhood on the division zone.