Water Absorbent Core with Partial Coating for Rapid Liquid Uptake

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Solution Overview

Problem

The coating portion in conventional water absorption treatment materials inhibits liquid from quickly reaching the core portion, leading to decreased water-absorptivity.

Innovation Solution

A water absorption treatment material design where 80% or more of the side surface of the core portion is covered by the coating portion, while 80% or more of the bottom surface is exposed, allowing liquid to quickly reach the core portion, and a manufacturing method to achieve this configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If the coating portion covers the core portion to adhere pieces together, then the clump formation is improved, but the water-absorptivity decreases

Engineering Contradiction:

Improveclump formationVSAvoidwater-absorptivity

Core Design Contradiction:

Stability of the object's compositionVSProductivity

Solution Approach 1:

The coating portion is selectively applied to cover 80% or more of the side surface while leaving 80% or more of the bottom surface exposed. This local differentiation allows the side surface to provide adhesion for clump formation while the bottom surface maintains high water-absorptivity for rapid liquid uptake.

Inventive Principle:

Principle #3Local quality

2Strength

If the coating portion covers the core portion, then the adherence of treated materials is improved, but the liquid penetration speed decreases

Engineering Contradiction:

ImproveadherenceVSAvoidliquid penetration speed

Core Design Contradiction:

StrengthVSSpeed

Solution Approach 1:

The coating coverage is segmented into different regions: the side surface is covered to provide adherence, while the bottom surface is left exposed to enable rapid liquid penetration. This spatial segmentation resolves the contradiction between adherence and penetration speed.

Inventive Principle:

Principle #1Segmentation

3Stability of the object's composition

If the coating portion is applied extensively, then the structural integrity is improved, but the absorption speed decreases

Engineering Contradiction:

Improvestructural integrityVSAvoidabsorption speed

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The coating is applied with local quality differentiation, covering 80% or more of the side surface for structural integrity while leaving 80% or more of the bottom surface exposed to maintain fast absorption speed, preventing time loss in the absorption process.

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

This design enhances water-absorptivity by ensuring liquid can rapidly contact the core portion, improving absorption speed and preventing decreases in water-absorptivity and solubility, while maintaining adherence of treated materials.

Implementation Method 1

a water absorption treatment material that absorbs a liquid

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS11278868B2Water absorption treatment material and method for manufacturing the same

Publication Date: 2022.03.22 DAIKI CO LTD

AI summary

A water absorption treatment material includes a core portion and a coating portion. The core portion is approximately circular column-shaped and has a side surface, a first bottom surface, and a second bottom surface. The coating portion is provided so as to cover the core portion. A region of 80% or more of the side surface of the core portion is covered by the coating portion. A region of 80% or more of the first bottom surface of the core portion is exposed without being covered by the coating portion.