Layered Adhesive Tab Tape for Smooth Opening of Wrapped Absorbent Articles
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Solution Overview
Problem
Conventional adhesive tab tapes in individually wrapped absorbent articles face issues with adhesive leakage leading to adhesion between folded portions, making it difficult to smoothly open the article, and insufficient adhesive strength for re-use in post-processes.
Innovation Solution
The adhesive tab tape consists of an upper and lower layer tape, where the lower layer adhesive is positioned only on one folded portion and not across the opening start end, with the lower layer substrate extending to cover the opening start end, and the upper layer tape extending from the lower layer substrate to the other folded portion, ensuring the adhesive does not contact the opening start end.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the adhesive force of the adhesive tab tape is increased to maintain the rolled state of the used sanitary napkin, then the adhesive strength for re-use is improved, but the wrapping sheet may be torn when the adhesive tab tape is peeled from the wrapping sheet to open the individually wrapped sanitary napkin
Solution Approach 1:
The adhesive tab tape is divided into two separate tapes: a first adhesive tab tape with strong adhesive force for maintaining the rolled state, and a second adhesive tab tape with weak adhesive force for easy opening. This segmentation allows each tape to serve its specific function without interfering with the other, resolving the contradiction between strong adhesive strength and preventing wrapping sheet tearing.
Solution Approach 2:
The first adhesive tab tape acts as an intermediary layer between the wrapping sheet and the second adhesive tab tape. It provides strong adhesive force to maintain the rolled state during storage and transport, while the second adhesive tab tape serves as a mediator for easy opening by the user, preventing direct contact between strong adhesive and the wrapping sheet during opening operations.
2Strength
If the adhesive force of the adhesive tab tape is increased to maintain the rolled state of the used sanitary napkin, then the adhesive strength for re-use is improved, but a portion of the torn wrapping sheet may adhere to the adhesive tab tape, making it difficult to re-attach the adhesive tab tape
Solution Approach 1:
The adhesive tab tape system is segmented into two functional components: the first adhesive tab tape that provides strong adhesive force for maintaining the rolled state, and the second adhesive tab tape that provides easy opening functionality. This segmentation ensures that the strong adhesive tape does not come into contact with the wrapping sheet during opening operations, preventing adhesion issues and making re-attachment easy.
Solution Approach 2:
The first adhesive tab tape serves as an intermediary protective layer between the strong adhesive and the wrapping sheet. It maintains strong adhesive force for re-use while preventing direct contact between the adhesive and the wrapping sheet during opening, thereby avoiding adhesion problems that would make re-attachment difficult.
3Ease of operation
If the adhesive tab tape is designed to peel easily from the wrapping sheet for opening, then the ease of opening is improved, but the adhesive strength for maintaining the rolled state in post-process is insufficient
Solution Approach 1:
The adhesive tab tape is segmented into two distinct components with different adhesive characteristics: the first adhesive tab tape with strong adhesive force for maintaining the rolled state during storage and transport, and the second adhesive tab tape with weak adhesive force for easy opening by the user. This segmentation allows each component to optimize its adhesive strength for its specific function without compromising the other.
Solution Approach 2:
The first adhesive tab tape acts as an intermediary that provides strong adhesive force for maintaining the rolled state during post-process handling. The second adhesive tab tape serves as a mediator for easy opening, allowing the user to easily open the package without requiring strong adhesive force, thus resolving the contradiction between ease of opening and adhesive strength for re-use.
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 design allows for smooth opening of the absorbent article without tearing the wrapping sheet and maintains sufficient adhesive strength for re-use, preventing adhesion between folded portions and ensuring easy handling.
Implementation Method 1
an adhesive tab tape is attached to a surface of the one folded portion and a surface of the other folded portion
Implementation Method 2
The lower layer tape is removably laminated on a lower side of the upper layer adhesive
Data Source
AI summary
[Object] To provide an individually wrapped absorbent article that can be smoothly opened and includes an adhesive tab tape having a sufficient adhesive strength even in a post-process.[Means of Achieving the Object] An adhesive tab tape 4 includes an upper layer tape 4A and a lower layer tape 4B. The upper layer tape 4A includes an upper layer substrate 20 and an upper layer adhesive 21 that is applied to the lower surface of the upper layer substrate 20. The lower layer tape 4B is removably laminated on the lower side of the upper layer adhesive 21, and includes a lower layer substrate 22 and a lower layer adhesive 23 that is applied to the lower surface of the lower layer substrate 22. The lower layer adhesive 23 of the lower layer tape 4B is disposed on the surface of a folded portion in a rear region AB, and a portion of the lower layer substrate 22 extends across an opening start end 14 from the lower layer adhesive 23 to the surface of a folded portion in a front region AF. This extended portion of the lower layer substrate 22 is non-adhesive. A portion of the upper layer tape 4A, including the upper layer substrate 20 and the upper layer adhesive 21, extends from the lower layer substrate 22 to the surface of the folded portion in the front region.