Absorbent Article Packaging Seal Pattern for Easy Opening
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Solution Overview
Problem
Existing packaging sheets made of difficult-to-fuse materials, such as paper, fail to achieve sufficient sealing strength and may be excessively difficult to open or break during unsealing.
Innovation Solution
A packaging sheet made of a difficult-to-fuse material is folded to form sealing portions with pressed portions spaced apart, and a heat sealing agent is applied in a predetermined pattern to overlap these portions, ensuring appropriate sealing strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a difficult-to-fuse material (such as paper) is used for the packaging sheet, then hygiene and design aesthetics are improved, but sealing strength is insufficient and the packaging sheet cannot be bonded sufficiently
Solution Approach 1:
A heat sealing agent is introduced as an intermediary substance applied to the packaging sheet to enable bonding between layers of difficult-to-fuse material. The heat sealing agent acts as a mediator that facilitates adhesion where direct bonding fails, allowing the packaging sheet to achieve sufficient sealing strength while maintaining its material properties for hygiene and aesthetics
Solution Approach 2:
The physical state of the heat sealing agent is changed from solid to liquid through heating, enabling it to flow and bond the packaging sheet layers. After cooling, it solidifies to provide strong sealing. This parameter change (temperature) allows the sealing process to work effectively with difficult-to-fuse materials like paper that cannot be bonded by simple thermal fusion
2Strength
If adhesive or tape is applied along both edge portions for sealing, then sealing strength is improved, but the seal cannot be peeled off easily and the packaging sheet may be broken during opening
Solution Approach 1:
The sealing structure is segmented into discrete pressed portions spaced apart from each other, rather than continuous sealing. This segmentation allows the seal to be broken at specific points during opening, enabling easy peeling without requiring excessive force that would tear the packaging sheet
Solution Approach 2:
The heat sealing agent is applied in a predetermined pattern to specific regions corresponding to the pressed portions, creating localized bonding zones. This local quality approach ensures strong sealing where needed while leaving other areas unbonded, facilitating easy opening by allowing the seal to break at controlled locations
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 provides a sealing portion with adequate strength for individually packaged absorbent articles, allowing easy opening without tearing, while maintaining hygiene and design aesthetics.
Implementation Method 1
a heat sealing agent is applied in a predetermined pattern to at least a region corresponding to the sealing portion on an inner surface of the packaging sheet
Implementation Method 2
the packaging sheet cannot be bonded by thermal fusion
Implementation Method 3
a plurality of pressed portions which are spaced apart from each other in a surface direction and which are formed by pressing the packaging sheet in a thickness direction
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An individually packaged absorbent article in which an absorbent article is individually packaged by a packaging sheet made of a difficult-to-fuse material. A sealing portion is formed by folding the packaging sheet toward an inner surface side of the packaging sheet in a first direction, and sealing both edge portions of a second direction orthogonal to the first direction. The sealing portion includes a plurality of pressed portions which are spaced apart from each other in a surface direction and which are formed by pressing the packaging sheet in a thickness direction. A heat sealing agent is applied in a predetermined pattern to at least a region corresponding to the sealing portion on an inner surface of the packaging sheet, and the pressed portion overlaps the heat sealing agent in a region where the heat sealing agent is applied to the packaging sheet.