High Molecular Weight Surfactant in Aqueous Developer

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Solution Overview

Problem

Aqueous developers for flexographic printing plates face issues with image reproducibility and dispersion adhesion/aggregation during repeated use, leading to contamination and maintenance problems.

Innovation Solution

An aqueous developer formulation with a surfactant having a molecular weight of 1000 or more, specifically a polymer with certain repeating units, and containing alkali metal carbonate, which maintains good printing reproducibility and suppresses dispersion adhesion and aggregation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional aqueous developers are used for repeated development, then image reproducibility is initially good, but dispersion adhesion and aggregation occur during repeated use

Engineering Contradiction:
Improveimage reproducibilityVSAvoiddispersion adhesion and aggregation
Core Design Contradiction:
ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the molecular weight parameter of the surfactant from conventional low molecular weight to high molecular weight (1000 or more). This parameter change allows the surfactant to maintain good image reproducibility while simultaneously suppressing dispersion adhesion and aggregation during repeated use, resolving the technical contradiction between initial performance and repeated use stability.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite surfactant system comprising high molecular weight surfactant (molecular weight 1000 or more) in combination with specific additives. This composite material approach enhances the surfactant's ability to prevent dispersion adhesion and aggregation while maintaining good image reproducibility throughout repeated development cycles.

Inventive Principle:
Principle #40Composite materials

2Productivity

If aqueous developer is used repeatedly, then productivity is improved, but contamination and maintenance problems increase

Engineering Contradiction:
Improverepeated development capabilityVSAvoidcontamination and maintenance problems
Core Design Contradiction:
ProductivityVSObject-affected harmful factors

Solution Approach 1:

By changing the molecular weight parameter of the surfactant to 1000 or more, the patent enables the aqueous developer to be used repeatedly for development without causing dispersion adhesion and aggregation. This allows improved productivity through repeated use while preventing contamination and maintenance problems that would otherwise occur.

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 solution effectively maintains good printing reproducibility and prevents dispersion adhesion and aggregation in the developer during repeated use, ensuring cleaner printing and extended device maintainability.

Implementation Method 1

an aqueous developer in which a surfactant having a predetermined molecular weight is formulated is capable of maintaining good printing reproducibility and suppressing the adhesion and aggregation of the dispersion in the developer during repeated use

Methodology Applied
Scientific EffectSurfactant: Surfactant

Implementation Method 2

a surfactant having a molecular weight of 1000 or more

Methodology Applied
Scientific EffectSteric hindrance:

Implementation Method 3

suppressing the adhesion and aggregation of the dispersion in the developer

Methodology Applied
Scientific EffectElectrostatic repulsion: Ion Repulsion/Attraction

Data Source

PatentUS12044972B2Method of manufacturing flexographic printing plate
Publication Date: 2024.07.23 FUJIFILM CORP
  • US12044972B2 patent drawing
  • US12044972B2 patent drawing
  • US12044972B2 patent drawing

AI summary

An aqueous developer for a flexographic printing plate capable of maintaining good printing reproducibility and suppressing the adhesion and aggregation of the dispersion in the developer during repeated use, and a method of manufacturing a flexographic printing plate using the same, are provided. The aqueous developer for a flexographic printing plate is an aqueous developer for a flexographic printing plate containing a surfactant having a molecular weight of 1000 or more, and water.