Preparation Method for Absorbent Body
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Solution Overview
Problem
Existing absorbent bodies in hygiene articles face challenges in maintaining shape retention after moisture absorption, achieving uniform absorption performance, and reducing manufacturing costs, particularly due to the limitations of using pulp or excessive adhesive amounts.
Innovation Solution
A preparation method for an absorbent body that involves sequentially applying an adhesive and super absorbent polymer multiple times on a nonwoven fabric without using pulp, followed by sealing with a second nonwoven fabric, ensuring the super absorbent polymer is properly fixed and uniformly distributed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pulp is used to fix super absorbent polymer particles, then bonding strength is improved, but the absorbent body becomes thick and manufacturing cost increases
Solution Approach 1:
The patent removes pulp from the absorbent body structure entirely, replacing it with a nonwoven fabric-based construction where super absorbent polymer particles are directly applied and bonded between two nonwoven fabric layers using adhesive, eliminating the need for pulp while maintaining structural integrity
Solution Approach 2:
The patent creates a composite structure combining nonwoven fabric layers with super absorbent polymer particles and adhesive, forming a multi-layer composite that provides both structural support and absorption functionality without requiring pulp
2Strength
If adhesive amount is increased to fix super absorbent polymer particles, then particle fixation is improved, but adhesive movement and performance deterioration occur
Solution Approach 1:
The patent optimizes the adhesive application parameters by controlling the adhesive amount to specific ranges (0.3-3.0 g/m² for first application, 0.2-2.0 g/m² for second application) and adjusting application patterns, achieving proper particle fixation while preventing adhesive movement and performance deterioration
3Reliability
If adhesive amount is reduced to avoid adhesive movement, then adhesive stability is improved, but particle fixation and shape retention deteriorate
Solution Approach 1:
The patent applies adhesive in a controlled preliminary manner with specific application patterns and amounts before applying super absorbent polymer particles, ensuring proper fixation is established in advance while preventing excessive adhesive that could cause movement
Solution Approach 2:
The patent uses a balanced adhesive application approach where adhesive is applied in controlled partial amounts at specific locations and patterns, achieving sufficient particle fixation without excessive adhesive that would cause movement or performance deterioration
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 method results in an absorbent body with excellent shape retention and absorption performance, reduced rewet deviation, and lower manufacturing costs, while also enhancing the filling rate and comfort of hygiene articles.
Implementation Method 1
applying an adhesive and a super absorbent polymer on a first nonwoven fabric
Implementation Method 2
exhibiting excellent shape retention even after moisture absorption
Data Source
AI summary
The present disclosure relates to a preparation method for an absorbent body exhibiting excellent shape retention even after moisture absorption, which can contribute to thinning the absorbent body by properly fixing the super absorbent polymer particles within the absorbent body without using pulp and can improve the filling rate by uniformly applying a super absorbent polymer.