Absorbent Product Side Wall Inward Bending Part Design
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Solution Overview
Problem
Existing absorbent products, such as disposable diapers, often compress the wearer excessively due to elastic members, leading to discomfort and leakage issues, and their manufacturing processes can be complex.
Innovation Solution
The design features a sheet-like main body with side wall parts that include a standing part, end parts, and elastic members bonded along the free edge and away from it, forming gathers and inwardly bending parts to reduce compression and enhance leakage prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic members are provided at the free edge of barrier cuffs or flaps to make them stand up, then leakage prevention is improved, but the wearer is compressed excessively leading to discomfort
Solution Approach 1:
The side wall part is divided into multiple sections: a standing part that extends upward, a first fixed part that is continuous in the longitudinal direction, and a second fixed part that spreads outward. This segmentation allows different portions to serve different functions - the standing part provides leakage prevention while the distributed fixed parts reduce compression on the wearer.
Solution Approach 2:
Different portions of the side wall part are given different structural characteristics. The standing part has high elasticity for leakage prevention, while the fixed parts are positioned to distribute compression forces. The first fixed part continues longitudinally for structural support, while the second fixed part spreads outward to distribute pressure, creating local quality variations that balance leakage prevention and wearer comfort.
2Reliability
If elastic members are provided at the top of side leakage prevention parts, then leakage prevention is improved, but the wearer is still compressed excessively
Solution Approach 1:
The invention transitions from placing elastic members only at the top (one-dimensional positioning) to distributing fixed parts across multiple dimensions - the first fixed part extends longitudinally while the second fixed part spreads outward in the width direction. This multi-dimensional distribution of structural elements allows the side wall part to maintain its standing shape for leakage prevention while distributing compression forces across a larger area, reducing pressure on the wearer.
3Object-affected harmful factors
If nonwoven fabric is curved to form hollow side leakage prevention parts, then compression to wearer is reduced, but the manufacturing process becomes complicated
Solution Approach 1:
Instead of curving the entire nonwoven fabric to form a hollow structure, the invention segments the side wall part into distinct functional zones: a standing part for leakage prevention, a first fixed part for longitudinal support, and a second fixed part for outward spreading and pressure distribution. This segmentation allows each part to be formed through simpler processes rather than complex curving and bonding operations.
Solution Approach 2:
Rather than starting with a curved hollow structure and then adding reinforcement elements, the invention inverts the approach by first establishing the basic side wall structure with the standing part and fixed parts, then forming the gathers through elastic member contraction. This inversion simplifies the manufacturing process by avoiding the complex curving and bonding operations required to create hollow structures.
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 effectively prevents excessive compression and leakage by distributing the elastic force more evenly, ensuring a surface contact with the wearer and maintaining the standing shape of the side wall parts, thereby enhancing comfort and leakage protection.
Implementation Method 1
an elastic member which is bonded to a free edge of the standing part along the free edge and which contracts to form gathers in the standing part
Implementation Method 2
an elastic member which is bonded to a free edge of the standing part along the free edge and which contracts to form gathers in the standing part
Data Source
AI summary
In a standing part (342) of each side wall part (34) in an absorbent product (1), an inwardly bending part (3423) is formed between a first elastic member (35) and a second elastic member (36). When the absorbent product (1) is worn, the inwardly bending part (3423) where no elastic member is provided comes into contact with a wearer to be deformed into surface shape, and a portion in the vicinity of the inwardly bending part (3423) and the first elastic member (35) contacts with the wearer in surface shape. Therefore, the wearer is prevented from being compressed excessively by the first elastic member (35) and the second elastic member (36) and excrement is prevented from leaking out to the outer side of the absorbent product (1).