Faux Galvanized Metal Finish via Flexographic Printing

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Solution Overview

Problem

Existing methods for galvanizing metal substrates, such as hot-dip, pre-galvanizing, and electro-galvanizing, while effective in corrosion protection, often result in exposed edges and non-uniform coatings, and lack the appealing spangle pattern that consumers associate with galvanized steel, which is difficult to replicate in alternative protective methods.

Innovation Solution

A flexographic method is employed to apply a faux galvanized finish on metal substrates, using a flexible rubber printing process with engraved plates to mimic the spangle pattern and coating thickness of galvanized steel, involving a pretreatment solution, a PVDF pattern, and a semi-transparent FEVE coating for durability and appearance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional galvanizing methods (hot-dip, pre-galvanizing, electro-galvanizing) are used to protect metal substrates, then corrosion protection is achieved, but the spangle pattern appearance is lost and edges remain exposed

Engineering Contradiction:

Improvecorrosion protectionVSAvoidspangle pattern appearance

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The patent applies a flexographic printing process that copies the spangle pattern appearance from genuine galvanized steel onto the metal substrate using ink formulations. This creates a visual replica of the desired appearance without requiring actual galvanization, thus preserving the aesthetic while maintaining corrosion protection through alternative means.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent uses composite ink formulations containing multiple components (pigments, binders, solvents) that work together to simulate the spangle pattern. The composite nature of the ink allows it to achieve both the visual appearance and protective functions in a single applied layer.

Inventive Principle:

Principle #40Composite materials

2Reliability

If hot-dip galvanizing is used to achieve thick zinc coating, then corrosion protection is improved, but the process complexity and cost increase

Engineering Contradiction:

Improvecorrosion protectionVSAvoidprocess complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces the complex mechanical and thermal processes of hot-dip galvanizing (heating zinc to molten state, dipping, cooling, spangle formation) with a flexographic printing system that applies pre-formulated ink at ambient or controlled temperatures. This substitution dramatically simplifies the equipment and process requirements while achieving similar protective and aesthetic outcomes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the fundamental parameters of the coating process by using ambient temperature application instead of high-temperature molten zinc immersion. The ink formulation is designed to achieve proper adhesion, drying, and curing at much lower temperatures, eliminating the need for complex heating and cooling systems.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If pre-galvanizing is used to rapidly coat large coils, then productivity increases, but exposed edges and non-uniform coating occur

Engineering Contradiction:

Improvecoating speedVSAvoidcoating uniformity

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The patent segments the coating application into controlled zones using flexographic printing plates that can be designed with specific patterns and coverage areas. This allows precise control over where coating is applied, ensuring uniform coverage across the substrate including edges, while maintaining high-speed production capability through continuous printing processes.

Inventive Principle:

Principle #1Segmentation

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 method provides a cost-effective and quick way to achieve a durable, visually appealing faux galvanized finish on coiled metal substrates with controlled spangle patterns and protective coatings, addressing the limitations of traditional galvanizing methods by ensuring uniformity and longevity.

Implementation Method 1

A flexographic method is employed to apply a faux galvanized finish on metal substrates, using a flexible rubber printing process with engraved plates

Methodology Applied

Scientific EffectFlexographic printing:

Implementation Method 2

involving a pretreatment solution, a PVDF pattern, and a semi-transparent FEVE coating for durability and appearance

Methodology Applied

Scientific EffectSurface pretreatment:

Implementation Method 3

a PVDF pattern...to mimic the spangle pattern and coating thickness of galvanized steel

Methodology Applied

Scientific EffectPattern deposition:

Implementation Method 4

a semi-transparent FEVE coating for durability and appearance

Methodology Applied

Scientific EffectProtective coating:

Data Source

PatentUS11518187B2Method of flexographically producing a faux galvanized metal finish on a substrate

Publication Date: 2022.12.06 STEELSCAPE LLC

AI summary

A coiled metal substrate with a faux galvanized surface appearance. The faux galvanized surface of the substrate including a spangle print pattern of polyvinylidene fluoride (PFDV) flexographically applied to the metal substrate. Atop the PFDV print pattern is semi-transparent coating of fluoroethylene vinyl ether (FEVE) flexographically applied atop the spangle print pattern of PFDV.