Patch Package Protrudent Parts Prevent Adhesive Adhesion
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Solution Overview
Problem
Existing patch package structures face challenges in preventing the pressure-sensitive adhesive layer from adhering to the inner surfaces of the package or user's hand, especially when the adhesive protrudes or flows out through the weakening line, leading to difficulties in removing the patch and discomfort.
Innovation Solution
The patch package structure incorporates protrudent parts on the package's molded sheet material to keep the adhesive away from inner surfaces, with a weakening line on the release liner and elevated parts to prevent stress on the adhesive, allowing easy removal and reducing skin irritation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a weakening line is formed in the release liner to assist removal, then ease of operation is improved, but the pressure-sensitive adhesive layer may protrude through the weakening line and adhere to the package or user's hand, causing discomfort
Solution Approach 1:
The package is divided into multiple protrudent parts that are spatially distributed to correspond to different locations on the patch. This segmentation allows each protrudent part to independently prevent adhesive adhesion at specific critical areas, particularly around the weakening line region, while maintaining the overall integrity and functionality of the package structure
Solution Approach 2:
The package structure transitions from a flat two-dimensional configuration to a three-dimensional structure with protrudent parts that extend outward. This dimensional change creates physical barriers that prevent the adhesive layer from contacting the package inner surface, effectively solving the adhesion problem while preserving the weakening line's removal function
2Object-affected harmful factors
If the pressure-sensitive adhesive layer contains a large amount of liquid component or is made thick to reduce skin irritation, then comfort during wear is improved, but the adhesive is more likely to protrude through the weakening line and adhere to the package
Solution Approach 1:
Multiple protrudent parts are strategically positioned to correspond to different regions of the patch, including areas around the weakening line. This segmented approach creates localized barriers that prevent adhesive protrusion at critical locations, enabling the use of thicker or more liquid-rich adhesive formulations without compromising package integrity
Solution Approach 2:
The protrudent parts act as intermediary structures between the patch and the package inner surface. These intermediaries physically separate the adhesive layer from the package, preventing direct contact and adhesion, thereby allowing the adhesive to maintain its therapeutic composition with higher liquid content or greater thickness
3Device complexity
If the weakening line freely contacts the package inner surface to simplify package structure, then device complexity is reduced, but adhesive may adhere to the package making patch removal difficult
Solution Approach 1:
The package structure is segmented into multiple protrudent parts rather than using a continuous barrier. This segmentation achieves the necessary adhesion prevention function with minimal structural complexity, as each protrudent part independently performs the separation function without requiring a complex continuous barrier structure
Solution Approach 2:
Instead of making the entire package structure complex to prevent adhesion, the invention applies local quality by positioning protrudent parts only at specific locations where adhesive protrusion is most likely to occur, particularly around the weakening line area. This localized approach maintains overall structural simplicity while effectively preventing adhesion at critical points
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3
AI summary
A patch package structure which includes: a package including a first sheet material which is planar and a second sheet material which has been molded, a peripheral area of the first sheet material having been sealed to a peripheral area of the second sheet material to constitute the package, and a patch disposed in the package; in which the patch includes a backing, a pressure-sensitive adhesive layer formed on at least one side of the backing, and a release liner which protects the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer, the release liner having a weakening line for assisting a removal of the release liner; and in which the second sheet material has specific first protrudent part, second protrudent part, third protrudent part and elevated part in a central area thereof except the peripheral area thereof.