Cellulose Acetate Fiber Drug Application Method
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Solution Overview
Problem
Conventional absorbent articles with cellulose acetate fiber layers face challenges in effectively applying a drug solution due to low water affinity, leading to migration issues when a water absorbent fiber member is laminated, resulting in insufficient drug application to the fiber assembly layer.
Innovation Solution
A method involving a fiber assembly layer of cellulose acetate fibers, where a drug aqueous solution containing an antibacterial agent, deodorizer, and surfactant is spread, enhancing affinity and preventing surface retention, allowing immediate dispersion and sufficient application to the fiber assembly layer, even when a water absorbent fiber member is directly mounted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a drug aqueous solution is spread on the fiber assembly layer of cellulose acetate fiber, then the drug can be applied to the fiber layer, but the solution migrates to the water absorbent fiber member due to low water affinity of the cellulose acetate fiber
Solution Approach 1:
A permeation prevention layer is introduced between the fiber assembly layer and the water absorbent fiber member. This intermediary layer prevents the drug aqueous solution from migrating to the water absorbent fiber member while allowing the solution to be retained in the fiber assembly layer, thus resolving the contradiction between drug application and solution migration.
Solution Approach 2:
The permeation prevention layer is positioned in advance to counteract the natural migration tendency of the aqueous solution. By establishing this preventive barrier before the solution can migrate, the system prevents the harmful effect of drug loss to the water absorbent fiber member.
2Productivity
If a member including water absorbent fiber is directly mounted on the fiber assembly layer, then production efficiency is improved, but the drug aqueous solution migrates to the member
Solution Approach 1:
The permeation prevention layer serves as a mediator that allows direct mounting of the water absorbent fiber member on the fiber assembly layer while preventing drug solution migration. This maintains production efficiency by enabling direct lamination while ensuring drug application precision through the barrier function of the permeation prevention layer.
3Device complexity
If no permeation prevention layer is used, then device complexity is reduced, but the drug cannot be sufficiently applied to the fiber assembly layer
Solution Approach 1:
The permeation prevention layer is a simple intermediary structure that adds minimal complexity to the system. It effectively prevents drug solution migration and ensures sufficient drug application to the fiber assembly layer, with the added benefit of potentially improving breathability and comfort in the final absorbent article.
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
Ensures effective application of the drug to the cellulose acetate fibers, preventing migration and ensuring the drug's presence within the fiber assembly layer.
Implementation Method 1
the drug aqueous solution contains an antibacterial agent and/or a deodorizer, and a surfactant
Implementation Method 2
Inclusion of the surfactant in the drug aqueous solution to be spread on the fiber assembly layer can improve the affinity of the drug aqueous solution for the fiber assembly layer
Implementation Method 3
the spread drug aqueous solution immediately disperses in the fiber assembly layer
Data Source
AI summary
[Object] To provide a method for producing an absorbent article comprising a fiber assembly layer of a cellulose acetate fiber, which can sufficiently apply a drug to the cellulose acetate fiber.[Solution] The present invention provides a method for producing an absorbent article, wherein the absorbent article comprises: a fiber assembly layer including a cellulose acetate fiber, and a member including a water absorbent fiber and directly disposed on the fiber assembly layer, the method comprises: a first step of opening a cellulose acetate tow and collecting a cellulose acetate fiber to form a fiber assembly layer; a second step of spreading a drug aqueous solution on the fiber assembly layer; and a third step of mounting the member on the surface where the drug aqueous solution has been spread of the fiber assembly layer, and the drug aqueous solution contains an antibacterial agent and/or a deodorizer, and a surfactant.