Metallic Ink Composition for PVC Substrates Preventing Nozzle Clogging
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Solution Overview
Problem
Conventional metallic ink compositions for inkjet printing on polyvinyl chloride substrates face nozzle clogging and reduced scratch resistance due to flocculation of aluminum pigments, which also lowers the metallic gloss of the printed products.
Innovation Solution
A metallic ink composition combining a polyester resin with a specific weight average molecular weight and an evaporated aluminum pigment dispersion member in an organic solvent, along with additional components like a phosphate copolymer and ultraviolet absorption agents, to prevent flocculation and enhance scratch resistance and mirror gloss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the amount of resin component is increased to enhance film performance, then scratch resistance and weatherability are improved, but aluminum pigment flocculates causing nozzle clogging and reduced metallic gloss
Solution Approach 1:
The patent changes the molecular weight parameter of the polyester resin to 12,000 or less, which is a specific parameter change that allows sufficient resin content for film performance while preventing pigment flocculation. This parameter optimization resolves the contradiction between scratch resistance and nozzle clogging.
Solution Approach 2:
The patent uses a composite system combining polyester resin with specific molecular weight characteristics and evaporated aluminum pigment dispersion members. This composite material approach allows the resin to provide film performance while the specific composition prevents pigment aggregation, resolving the contradiction between strength and harmful factors.
2Strength
If the amount of resin component is increased to enhance film performance, then scratch resistance and weatherability are improved, but metallic gloss of recording product is lowered
Solution Approach 1:
The patent optimizes the molecular weight parameter of polyester resin to 12,000 or less, which controls the balance between resin functionality and pigment dispersion. This parameter change ensures sufficient scratch resistance while maintaining pigment distribution for metallic gloss.
Solution Approach 2:
The composite material system of low molecular weight polyester resin and evaporated aluminum pigment dispersion creates a formulation where resin provides protection without compromising the metallic appearance, resolving the contradiction between strength and illumination intensity.
3Duration of action of stationary object
If a large amount of resin is mixed to improve film performance, then weatherability is improved, but aluminum pigment flocculation occurs
Solution Approach 1:
The patent changes the molecular weight parameter of polyester resin to 12,000 or less, which provides sufficient weatherability while maintaining pigment dispersion stability. This specific parameter change resolves the contradiction between duration of action and composition stability.
Solution Approach 2:
The composite material system combines polyester resin with controlled molecular weight and evaporated aluminum pigment dispersion, creating a stable formulation that maintains both weatherability and pigment dispersion over time.
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 prevents nozzle clogging and achieves printed products with improved scratch resistance and excellent mirror gloss, while maintaining film performance.
Implementation Method 1
a polyester resin (a) having a weight average molecular weight of 12,000 or less; a metallic pigment dispersion member (b) formed by dispersing an evaporated aluminum pigment in only an organic solvent
Implementation Method 2
an organic solvent (c) permeable to a polyvinyl chloride substrate
Data Source
AI summary
A metallic ink composition for inkjet printing for a polyvinyl chloride substrate, can form printed matter having superior mirror gloss and favorable scratch resistance, and is able to prevent nozzle clogging during inkjet printing, and more specifically pertains to a metallic ink composition that is for inkjet printing for a polyvinyl chloride substrate and that is characterized by containing at least a polyester resin (a) having a weight average molecular weight of no greater than 12,000, a metallic pigment dispersion (b) resulting from dispersing a evaporated aluminum pigment only in an organic solvent, and an organic solvent (c) that has solubility with respect to the polyvinyl chloride substrate.