SFC Coating for Ink Jet Print Head Face Plates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional inkjet print head face plates are prone to contamination and surface damage, leading to issues like drooling and flooding, which result in print quality degradation and increased maintenance costs.
Innovation Solution
A novel topcoat layer composed of fully cross-linked siloxyfluorocarbon (SFC) material is applied to the print head face plates, providing a robust, hydrophobic, and oleophobic surface that prevents ink adhesion and extends the life of the print head components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional face plate coatings are used, then the print head can operate initially, but the coatings are prone to surface damage and contamination leading to drooling and flooding
Solution Approach 1:
The patent applies a multi-layer coating system consisting of a base coating layer and a topcoat layer. The base layer provides adhesion to the face plate substrate, while the topcoat layer provides hydrophobic and oleophobic properties to prevent ink adhesion. This composite structure resolves the contradiction by combining materials with complementary functions to achieve both reliable operation and coating durability.
Solution Approach 2:
The patent modifies the surface energy parameters of the coating by incorporating fluorocarbon compounds and silane cross-linking agents. These chemical modifications create a low surface energy surface that repels both water and oil-based inks, preventing drooling and flooding while maintaining coating integrity under thermal and mechanical stress.
2Strength
If the coating is made more robust to prevent surface damage, then coating durability improves, but the coating may not adhere as well to the face plate surface
Solution Approach 1:
The coating system is segmented into distinct functional layers: a base coating layer optimized for adhesion to the face plate substrate, and a topcoat layer optimized for ink repellency. This segmentation allows each layer to be formulated with specific properties, resolving the contradiction between adhesion and durability by assigning different functions to different layers.
Solution Approach 2:
The base coating layer acts as an intermediary between the face plate substrate and the topcoat layer. It provides a chemically active surface that promotes adhesion to the substrate while presenting a chemically inert, low surface energy surface to the topcoat layer, enabling both strong bonding and ink repellency.
3Reliability
If the coating displays high surface wetting, then ink adhesion increases, but drooling and flooding occur
Solution Approach 1:
The patent converts the harmful effect of surface wetting into a beneficial property by carefully controlling the surface energy parameters. The coating is designed to display minimal surface wetting for both water-based and oil-based inks, transforming the potential harm of ink adhesion into a beneficial non-stick surface that prevents drooling and flooding while maintaining reliable ink jet operation.
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 SFC coating significantly reduces print head defects, prevents drooling and flooding, and maintains print quality by providing a durable, non-stick surface for both solid and UV curable inks, thus extending the life of the print head face plate.
Implementation Method 1
display hydrophobic and/or oleophobic interactions when in contact with inks
Implementation Method 2
display hydrophobic and/or oleophobic interactions when in contact with inks
Implementation Method 3
a fully cross-linked material comprised of siloxyfluorocarbon
Data Source
AI summary
A novel composition for use as a print head face plate coating. In particular, the coating comprises siloxyfluorocarbon (SFC), which is composed of networked precursors containing reactive siloxane groups attached to fluorocarbon chains. The present SFC coatings can be used to produce a surface whereby solid ink and ultraviolet (UV) curable inks do not adhere when applied at elevated temperatures and over an extended period of time. The advantages of the present coating are fewer print head related defects, and longer front face life.