Thin Printing Surface Layer on Image Reinforcement Layer
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Solution Overview
Problem
Current methods for manufacturing printing blankets or sleeves with rubber-based printing surface layers are inefficient due to high solvent usage, multiple coating passes, and time-consuming curing processes, which affect the gauge and texture of the printing surface.
Innovation Solution
A thin printing surface layer (0.001 to 0.012 inches thick) is combined with a smooth image reinforcement layer, such as a polymeric film or fabric, to reduce solvent usage and improve manufacturing efficiency, using materials like thermoplastic polyurethane or nitrile rubber, applied through methods like knife-over-roll coating or lamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a traditional rubber-based printing surface layer is used, then the printing surface can carry and transfer liquid printing ink, but high solvent usage and multiple coating passes are required
Solution Approach 1:
The patent changes the physical and chemical parameters of the printing surface layer by using a thin polymer coating (0.001 to 0.012 inches) instead of traditional thick rubber layers. This parameter change allows the coating to be applied in fewer passes with significantly reduced solvent usage, while still maintaining the ability to carry and transfer printing ink effectively
Solution Approach 2:
The patent creates a composite structure combining a thin polymer printing surface layer with a smooth image reinforcement layer. This composite material approach allows the thin polymer layer to provide printing functionality while the reinforcement layer provides structural support, eliminating the need for thick rubber layers that require multiple coating passes and high solvent usage
2Productivity
If natural or synthetic rubber materials are calendared onto the base ply in a single pass, then manufacturing time is reduced, but great expense is required to adequately control gauge
Solution Approach 1:
The patent changes the thickness parameter of the printing surface layer to a very thin range (0.001 to 0.012 inches) and uses a smooth image reinforcement layer to maintain uniformity. This allows single-pass application methods to achieve both high productivity and adequate gauge control, as the thin coating is less sensitive to variations in application thickness
3Ease of manufacture
If rubber materials are coated and cured under pressure, then the printing surface layer is formed, but the process is time consuming
Solution Approach 1:
The patent changes the material composition and thickness parameters to use a thin polymer coating that requires minimal curing time and pressure. The reduced thickness and modified material properties allow the coating to achieve adequate curing much faster than traditional thick rubber layers, significantly reducing the overall manufacturing time while maintaining ease of manufacture
4Productivity
If a thin printing surface layer is used, then solvent usage is reduced and manufacturing efficiency is improved, but the printing surface may show visible patterns or textures
Solution Approach 1:
The patent creates a composite structure where a thin polymer printing surface layer is combined with a smooth image reinforcement layer. The reinforcement layer acts as a uniform base that prevents patterns or textures from showing through the thin polymer coating, thereby maintaining surface uniformity while allowing the thin layer to provide manufacturing efficiency and reduced solvent usage
Solution Approach 2:
The patent applies different properties to different layers: the polymer printing surface layer provides ink-carrying functionality while the image reinforcement layer provides smoothness and structural support. This local differentiation of qualities allows the thin polymer layer to be used without compromising surface uniformity
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 results in a more efficient manufacturing process with reduced solvent usage, improved uniformity, and enhanced web control and registration characteristics, allowing for a thinner printing surface without visible patterns or textures.
Implementation Method 1
applied through methods like knife-over-roll coating or lamination
Data Source
AI summary
An image transfer product such as an offset printing blanket or sleeve is provided which comprises a very thin printing surface layer in combination with a smooth image reinforcement layer comprising a polymeric film, a fabric, or a polymer-coated fabric. The thin printing surface layer has a thickness between about 0.001 to about 0.012 inches (about 0.025 to about 0.3 mm). The image transfer product is more efficiently manufactured due to reduced solvent usage and reduced number of coating passes, and in use, exhibits uniform feed, web control, and registration characteristics.