Absorbent Article Concave Groove Embossing Design
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Solution Overview
Problem
Conventional absorbent articles with concave grooves are prone to collapse under pressure, leading to reduced fluid retention capacity and emboss roller blockage due to compression distortion and accumulation of pulp paper powders between fine emboss patterns.
Innovation Solution
The absorbent article features a highly compressed portion with a wavy-shaped first emboss and a second emboss along the concave groove's side edges, which are strategically positioned to prevent collapse and improve runnability by dispersing pressure and preventing material distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a wavy line pattern highly compressed portion is provided at the bottom surface of the concave groove, then the concave groove is reinforced and body fluid diffusion is improved, but the concave groove is easily collapsed under pressure from one side and the space for retaining body fluid becomes narrow
Solution Approach 1:
The highly compressed portion is divided into multiple independent emboss patterns (first emboss and second emboss) rather than a continuous wavy line. The first emboss extends diagonally from one side end to the other side end of the concave groove, while the second emboss is provided at the other side end, creating segmented reinforcement points that distribute pressure more effectively and prevent localized collapse.
Solution Approach 2:
The emboss patterns are positioned asymmetrically to address pressure from different directions. The first emboss is oriented to resist pressure from one direction, while the second emboss is positioned at the opposite side end to resist pressure from the other direction, creating asymmetric reinforcement that covers all possible pressure application scenarios.
2Strength
If a fine pattern highly compressed portion is provided at the bottom surface of the concave groove, then the concave groove is reinforced, but runnability is worsened due to accumulation of pulp paper powders at cavities between emboss protruding portions
Solution Approach 1:
The harmful cavities between fine emboss protruding portions are eliminated by using a coarse pattern instead. The first emboss and second emboss are designed as large, simple geometric shapes without complex fine details, removing the cavities where pulp paper powders would accumulate and improving runnability during the embossing process.
Solution Approach 2:
The emboss pattern parameters are changed from a fine pattern to a coarse pattern with larger feature sizes. This parameter change reduces the number and size of cavities between emboss elements, thereby reducing pulp paper powder accumulation and improving runnability while maintaining the reinforcement function.
3Stability of the object's composition
If a highly compressed portion is provided at the bottom surface of the concave groove, then the concave groove shape is retained, but large compression distortion is generated in the front surface material and splits of the liquid permeable topsheet are generated
Solution Approach 1:
The compression force is distributed across multiple independent emboss patterns rather than applied through a single continuous fine pattern. The first emboss and second emboss act as separate compression zones, allowing the front surface material to better accommodate the compression forces and reducing overall compression distortion and splitting.
Solution Approach 2:
The emboss patterns are designed with specific local characteristics - the first emboss extends diagonally across the concave groove while the second emboss is positioned at the opposite side end. This local quality distribution ensures that compression forces are applied in a way that maintains the concave groove shape while minimizing distortion of the front surface material.
Data Source
AI summary
An absorbent article includes a concave groove formed in an absorbent body; and a highly compressed portion formed at a bottom surface of the concave groove, wherein the highly compressed portion includes a first emboss formed by a pattern in which a unit section, obtained by sectioning the concave groove in a longitudinal direction, is repeatedly positively inverted in a longitudinal direction, the first emboss being formed by extending in a width direction while inclining in the longitudinal direction to cross from a side end to the other side end of the concave groove in the unit section, and a second emboss formed along the concave groove at side edge portions, that are opposite of protruding portions of the first emboss that protrude outwardly in the width direction, respectively, and wherein the first emboss and the second emboss are provided to be apart from each other.