Compact Tampon with Segmented Absorbent Core

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Solution Overview

Problem

Conventional tampons are not suitable for daily use between menstruation days due to their size, weight, and potential for irritation, leading to discomfort and allergic reactions, and existing alternatives like panty liners can cause irritation and are not effective in managing fluid absorption.

Innovation Solution

A tampon design with an absorbent body made from fibrous material, optimized for size (length < 40 mm, diameter < 10 mm), absorbency (0.5-4 g), and shape (cylindrical or conical) to minimize discomfort, reduce odor, and prevent irritation, featuring a retraction cord for easy removal and a nonwoven casing to prevent fiber loss.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If conventional tampons are used for daily use between menstruation days, then fluid absorption capacity is sufficient, but the size and weight cause discomfort and irritation

Engineering Contradiction:
Improvefluid absorption capacityVSAvoidirritation and discomfort
Core Design Contradiction:
Quantity of substanceVSObject-affected harmful factors

Solution Approach 1:

The tampon is segmented into distinct functional zones: a highly absorbent core region surrounded by a less compressed outer region. This segmentation allows the core to provide sufficient fluid absorption capacity while the outer region reduces overall density and weight, minimizing discomfort and irritation during daily use between menstruation days.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different regions of the tampon have different compression densities: the core region is highly compressed to maximize absorption capacity in a small volume, while the outer region is less compressed to reduce overall weight and improve comfort. This local quality variation resolves the contradiction between absorption capacity and comfort.

Inventive Principle:
Principle #3Local quality

2Quantity of substance

If conventional tampons are used for daily use, then fluid absorption is effective, but the large size causes significant suction and pressure on vaginal muscles

Engineering Contradiction:
Improvefluid absorptionVSAvoidsuction and pressure on muscles
Core Design Contradiction:
Quantity of substanceVSForce

Solution Approach 1:

The tampon structure segments absorption function into a compact core region, concentrating the absorption capability in a small volume that exerts minimal pressure on surrounding tissues. The less compressed outer region provides structural support without significant absorption function, reducing overall suction force on vaginal muscles.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The tampon uses composite construction with highly compressed absorbent material in the core and less compressed material in the outer region. This composite structure achieves effective fluid absorption in a compact form factor that minimizes mechanical force on vaginal muscles.

Inventive Principle:
Principle #40Composite materials

3Object-affected harmful factors

If the tampon size is reduced for daily use comfort, then comfort and reduced pressure are achieved, but the absorption capacity decreases

Engineering Contradiction:
Improvecomfort and reduced pressureVSAvoidabsorption capacity
Core Design Contradiction:
Object-affected harmful factorsVSQuantity of substance

Solution Approach 1:

The tampon applies local quality variation by creating a highly compressed core region with maximum absorption density surrounded by a less compressed outer region. This allows the overall tampon to be small and comfortable while the core region provides sufficient absorption capacity for daily use between menstruation days.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The composite structure combines highly compressed absorbent core material with less compressed outer material, achieving a compact overall size that provides comfort and minimal pressure, while the dense core region maintains adequate absorption capacity for light fluid management.

Inventive Principle:
Principle #40Composite materials

4Volume of moving object

If highly compressed absorbent material is used to reduce tampon size, then the tampon becomes more compact and comfortable, but the overall weight increases

Engineering Contradiction:
Improvetampon sizeVSAvoidtampon weight
Core Design Contradiction:
Volume of moving objectVSWeight of moving object

Solution Approach 1:

The tampon segments the compressed material into a small core region, concentrating the weight-reducing benefit in the absorption zone while the larger outer region uses less compressed, lighter material. This segmentation resolves the contradiction by limiting high-density material to only where absorption is needed.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Highly compressed material is applied locally only to the core region where absorption capacity is critical, while the outer region uses less compressed, lighter material. This local quality approach minimizes overall weight while maintaining compact size and sufficient absorption performance.

Inventive Principle:
Principle #3Local quality

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 tampon provides enhanced comfort, reduces odor, minimizes vaginal irritation, and is suitable for daily use, including during sports and swimming, while reducing the risk of toxic shock syndrome and improving hygiene by effectively managing fluid absorption without significant suction or pressure on vaginal muscles.

Implementation Method 1

The absorbent body has a volume of absorbent material which is capable of absorbing a liquid quantity of between 0.5 g and 4 g

Methodology Applied
Scientific EffectAbsorption: Absorption (physical)

Implementation Method 2

the absorbent material is made from a fibrous material, as a result of which the droplets of liquid can adhere to the individual fibers

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS9861535B2Tampon for days between menstruation
Publication Date: 2018.01.09 RUGGLI AG
  • US9861535B2 patent drawing
  • US9861535B2 patent drawing
  • US9861535B2 patent drawing

AI summary

A tampon with an absorbent body of which at least a part of its volume is made from an absorbent material and having a middle part, a distal end and a proximal end, and which is connected to an extraction device. The volume of absorbent material in such a tampon is designed to absorb between 0.5 g and 4 g, preferably 3.5 g, of liquid.