Water-Soluble Coloring Sheets for Non-Stick Uniform Dissolution

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Solution Overview

Problem

Existing sheet-like coloring materials tend to stick to each other, lack self-standing property, and do not dissolve uniformly in water, leading to uneven color application and poor handleability.

Innovation Solution

A water-soluble sheet-like coloring material comprising a film-forming water-soluble polymer, a dissolution accelerator, a colorant, and a moisture-retaining agent, which prevents adhesion and ensures quick dissolution into a uniform liquid state.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If sheet-like coloring materials are stored stacked, then storage efficiency is improved, but sheets stick to each other causing handling problems

Engineering Contradiction:

Improvestorage efficiencyVSAvoidhandling ease

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

A release paper is introduced as an intermediary layer between stacked sheets to prevent adhesion. The release paper has low adhesion to the coloring material sheets, allowing sheets to be stored efficiently in stacks while maintaining ease of handling and separation when needed.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Duration of action of moving object

If sheets are made thinner for flexibility, then flexibility is improved, but self-standing property deteriorates

Engineering Contradiction:

ImproveflexibilityVSAvoidself-standing property

Core Design Contradiction:

Duration of action of moving objectVSStrength

Solution Approach 1:

The thickness of the sheets is optimized within a specific range (0.1-1.0 mm) to achieve a balance between flexibility and self-standing property. Additionally, the inclusion of a moisture-retaining agent (5-30 parts by mass) helps maintain the sheet's structural integrity and self-standing capability while preserving flexibility through controlled moisture content.

Inventive Principle:

Principle #35Parameter changes

3Strength

If sheets are made thicker for self-standing property, then self-standing property is improved, but adhesion between sheets worsens

Engineering Contradiction:

Improveself-standing propertyVSAvoidadhesion between sheets

Core Design Contradiction:

StrengthVSObject-generated harmful factors

Solution Approach 1:

Release paper is used as a mediator between stacked sheets to prevent adhesion. This allows the sheets to be made thicker for better self-standing property without suffering from adhesion issues when stored in stacks, as the release paper prevents direct contact between sheet surfaces.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The thickness of sheets is optimized within a specific range (0.1-1.0 mm) to achieve a balance between self-standing property and adhesion. Additionally, the inclusion of a moisture-retaining agent (5-30 parts by mass) helps control surface moisture to reduce adhesion between sheets while maintaining adequate thickness for self-standing capability.

Inventive Principle:

Principle #35Parameter changes

4Productivity

If coloring materials dissolve quickly in water, then color developability is improved, but uniformity of dissolution worsens

Engineering Contradiction:

Improvedissolution speedVSAvoiduniformity of dissolution

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The coloring material uses a composite formulation combining water-soluble polymers (such as polyvinyl alcohol, carboxymethyl cellulose, or starch derivatives) with colorants and moisture-retaining agents. This composite structure ensures quick dissolution while maintaining uniformity through the synergistic effects of the components, preventing aggregation and ensuring even color distribution.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The molecular weight and composition of water-soluble polymers are optimized to achieve quick and uniform dissolution. The moisture-retaining agent content (5-30 parts by mass) is controlled to facilitate rapid water absorption and uniform distribution of colorant throughout the sheet, ensuring both fast dissolution and homogeneous color development.

Inventive Principle:

Principle #35Parameter changes

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 material exhibits low adhesiveness, moderate self-standing property, and flexibility, allowing for easy handling and excellent color developability with uniform color application.

Implementation Method 1

a film-forming water-soluble polymer

Methodology Applied

Scientific EffectFilm formation:

Implementation Method 2

a dissolution accelerator

Methodology Applied

Scientific EffectDissolution acceleration:

Implementation Method 3

a moisture-retaining agent

Methodology Applied

Scientific EffectMoisture retention:

Data Source

PatentUS12595378B2Water-soluble sheet-like coloring material, water-soluble sheet-like coloring material set, and paint set

Publication Date: 2026.04.07 PILOT PEN CO LTD

AI summary

Provided is a water-soluble sheet-like coloring material in which sheets are less likely to stick to each other, have appropriate self-standing property and flexibility, and can be quickly brought into a uniform state when dissolved in water.A water-soluble sheet-like coloring material including a film-forming water-soluble polymer; a dissolution accelerator; a colorant; and a moisture-retaining agent.