Absorber Slit Elastic Members for Leakage Prevention
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Solution Overview
Problem
Absorbent articles with slits extending in the front-back direction and additional slits on the sides face challenges in liquid diffusibility and fit due to the formation of secondary slits, which can lead to leakage and deformation issues.
Innovation Solution
Incorporating second slit elastic members that cross the continuous direction of the secondary slits, allowing them to be partially or completely closed, thereby deforming the absorber into a boat shape to enhance liquid diffusibility and prevent leakage, while maintaining a secure fit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If auxiliary patterns are added to lift and support the main slit pattern, then the main slit can be formed, but second slits are created that facilitate lateral liquid diffusion and cause absorber deformation
Solution Approach 1:
The harmful auxiliary patterns are completely removed from the mask design. Instead of using auxiliary patterns to support the main slit pattern, the invention uses a different approach where the mask simply defines the first slit pattern without any additional supporting structures, thereby eliminating the source of harmful second slits
Solution Approach 2:
The invention converts the potential harm of slit deformation into a benefit by using elastic members positioned at specific locations. These elastic members allow controlled deformation in beneficial directions while preventing harmful lateral diffusion, transforming the deformation issue into a feature that enhances fit and absorption performance
2Manufacturing precision
If slits extend to side edges of the absorber, then the slit pattern is complete, but liquid diffusibility in lateral direction increases causing leakage
Solution Approach 1:
The mask design implements local quality by defining slits with different characteristics in different regions. The first slits have specific dimensions and positions that are optimized for front-back liquid diffusion, while the overall pattern is designed to prevent lateral extension, creating locally optimized absorption zones that prevent harmful lateral leakage
Solution Approach 2:
The mask serves as an intermediary tool that precisely controls slit formation. By using the mask with carefully designed first slit patterns, the invention mediates between the need for complete slit coverage and the need to prevent lateral leakage, achieving both goals through precise pattern definition without harmful auxiliary patterns
3Object-generated harmful factors
If the absorber is deformed into boat shape, then liquid diffusibility across secondary slits is improved and lateral leakage is prevented, but the structure becomes more complex
Solution Approach 1:
The absorber design incorporates dynamic characteristics through elastic members that allow the structure to deform into a boat shape in response to liquid absorption. This dynamic deformation automatically prevents lateral leakage without requiring complex rigid structural elements, achieving leakage prevention through simple elastic deformation
Solution Approach 2:
The invention changes the physical state and shape parameters of the absorber by allowing it to deform from a flat configuration to a boat shape. This parameter change is achieved through strategically placed elastic members that facilitate controlled deformation, improving liquid diffusion and leakage prevention without adding structural complexity
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
The absorber's deformation into a boat shape improves liquid diffusibility across the secondary slits and prevents lateral leakage, while the elastic members ensure a secure fit and effective leakage prevention.
Implementation Method 1
second slit elastic members that cross in the continuous direction of the second slits and exert a contraction force in the direction of closing of the second slits
Implementation Method 2
an absorber, the absorber has a first slit formation region in a width-direction intermediate portion where one or more first slits extending in a front-back direction are provided
Data Source
AI summary
The present invention is intended to improve the liquid diffusibility and fit of an absorber having a first slit extending in a front-back direction and second slits continuing laterally from the first slit to the side edges. The foregoing issue is solved by providing one first slit extending in the front-back direction in a width-direction intermediate portion of an absorber, providing second slits continuing from each of front end side and back end side of the first slit toward width-direction both sides to the side edges, and providing second slit elastic members to cross in the direction of continuance of the second slits and exert a contraction force in the direction of closing of the second slits.