Aqueous Inkjet Inks for Melamine Adhesion

Solution Overview

Problem

Existing aqueous inkjet inks face adhesion issues with melamine resin-coated decorative laminates, leading to robustness challenges in the manufacturing process, particularly due to high temperature requirements for crosslinking agents and storage inefficiencies in the production of decorative surfaces.

Innovation Solution

Development of an aqueous inkjet ink with a specific fluorosurfactant and oligomer combination to achieve optimal static surface tension and viscosity, allowing for improved adhesion and simplifying the manufacturing process by integrating in-house printing at the floor laminate manufacturer, eliminating the need for intermediate warehouses and enabling rapid design changes and cost-efficient short print runs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional aqueous inkjet inks are used on melamine resin-coated substrates, then the manufacturing process can proceed with standard materials, but adhesion problems occur between the ink and the resin coating

Engineering Contradiction:

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent modifies the chemical composition parameters of the aqueous inkjet ink by incorporating specific additives (silane-modified polymers, titania, zirconia, or alumina particles) to enhance adhesion to melamine resin coatings. This allows standard manufacturing processes to be used while achieving reliable adhesion without requiring high-temperature crosslinking agents or complex process changes.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent introduces intermediary substances (silane-modified polymers and inorganic particles) that act as mediators between the aqueous inkjet ink and the melamine resin coating. These intermediaries facilitate bonding between the ink and the resin-coated substrate, resolving the adhesion problem without requiring fundamental changes to the manufacturing process.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If gravure printing is used for decorative surfaces, then high-quality printing can be achieved, but large warehouses are needed to store decor rolls and time delays occur between ordering and delivery

Engineering Contradiction:

Core Design Contradiction:

Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent replaces the mechanical gravure printing system with an inkjet printing system that uses digitally controlled ink deposition. This substitution enables on-demand printing of decorative patterns directly at the floor laminate manufacturer, eliminating the need for large warehouses to store pre-printed decor rolls and reducing time delays between ordering and delivery while maintaining printing quality.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent enables preliminary printing of decorative patterns directly on the substrate at the point of use, rather than requiring advance printing and storage of decor rolls. This allows the manufacturer to print decorative patterns on-demand based on market demand, eliminating the need for warehouse storage and reducing lead times.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If acrylate ink is used for digital printing, then printing flexibility is improved, but adhesion problems occur with reactive melamine resin mixture requiring crosslinking agents that react only above 50°C or 70°C

Engineering Contradiction:

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent introduces silane-modified polymers and inorganic particles as intermediaries that enable adhesion between acrylate ink and reactive melamine resin mixture at lower temperatures. These intermediaries facilitate bonding without requiring high-temperature crosslinking agents, thus maintaining printing flexibility while improving adhesion reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent modifies the ink composition by adding specific additives that change the adhesion parameters of the acrylate ink, enabling it to bond effectively with reactive melamine resin mixture at lower temperatures without requiring high-temperature crosslinking processes.

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 ensures strong adhesion between layers, reduces storage needs, allows for flexible design changes, and enhances cost-efficiency by eliminating intermediate steps and storage requirements, while maintaining high-quality image reproduction.

Implementation Method 1

aqueous inkjet ink with a specific fluorosurfactant and oligomer combination to achieve optimal static surface tension

Methodology Applied

Scientific EffectSurface tension reduction: Surfactant

Implementation Method 2

improved adhesion

Methodology Applied

Scientific EffectWetting: Wetting

Data Source

PatentUS10119043B2Aqueous inkjet inks

Publication Date: 2018.11.06

AI summary

An aqueous inkjet ink contains: a) a color pigment; b) an alkoxylated fluorosurfactant; and c) an ethoxylated oligomer having a molecular weight smaller than 400; and has a static surface tension at 25° C. of no more than 28 mN·m;and a viscosity between 5 and 12 mPa·s at 32° C. at a shear rate of 1,000 s−1.