Al Alloy Composition for Lithographic Printing Plate Supports
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current aluminum alloys used for lithographic printing plate supports face challenges in achieving homogeneous electrochemical roughening and maintaining mechanical properties, particularly after baking processes, with high costs and issues related to thermal stability and fatigue strength.
Innovation Solution
An aluminum alloy composition with specific proportions of Mg, Mn, Fe, Si, Cu, and Ti, optimized to achieve improved electrochemical roughening and mechanical properties, including a Fe/Mn ratio of 2 to 15, which enhances thermal stability and reduces charge carrier input, resulting in a more cost-effective and durable printing plate support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the iron content is increased to improve strength after baking, then mechanical strength is improved, but homogeneous electrochemical roughening becomes difficult to achieve
Solution Approach 1:
The patent applies parameter changes by optimizing the alloy composition within specific ranges: Fe content at 0.3-0.6%, Mn content at 0.05-0.2%, and Si content at 0.05-0.3%. This controlled adjustment of compositional parameters enables the material to achieve both high strength after baking and homogeneous electrochemical roughening, resolving the contradiction between these two requirements.
2Manufacturing precision
If aluminum alloy AA1050 is used to achieve good electrochemical roughening, then roughening quality is improved, but fatigue strength and thermal stability are insufficient
Solution Approach 1:
The patent employs composite material principles by creating an optimized aluminum alloy composition that combines Al with specific amounts of Fe (0.3-0.6%), Mn (0.05-0.2%), and Si (0.05-0.3%). This composite alloying strategy integrates the benefits of AA1050's good roughening properties with enhanced fatigue strength and thermal stability, effectively resolving the contradiction between roughening quality and mechanical reliability.
3Strength
If the aluminum alloy composition is optimized for strength, then mechanical properties are improved, but charge carrier input for roughening increases
Solution Approach 1:
The patent resolves this contradiction through precise parameter optimization of the alloy composition, specifically setting Fe at 0.3-0.6%, Mn at 0.05-0.2%, and Si at 0.05-0.3%. This optimized compositional parameter range achieves both improved mechanical properties and reduced charge carrier input during electrochemical roughening, as the balanced alloy structure facilitates more efficient electrochemical reactions.
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 optimized alloy composition ensures efficient electrochemical roughening with reduced charge carrier input, improved mechanical properties, and increased thermal stability, leading to enhanced durability and cost-effectiveness in producing printing plate supports.
Implementation Method 1
the substrate, produced from an aluminum strip, must be able to be roughened homogeneously using mechanical, chemical, and electrochemical roughening processes
Implementation Method 2
after exposure and development, the printing plates are often subjected to a curing process at 220 to 300 °C for a duration of 3 to 10 minutes to harden the applied photographic layer
Data Source
AI summary
The invention relates to an aluminum strip for lithographic printing plate supports comprised of an aluminum alloy, to a method for producing an aluminum strip for lithographic printing plate supports and to a printing plate support. The aim of the invention is to provide an aluminum strip for lithographic printing plate supports from which printing plate supports having an improved ability to be roughened and, at the same time, improved mechanical properties, particularly after an annealing process, can be produced. To this end, an aluminum strip for lithographic printing plate supports with an aluminum alloy has the following proportions of alloy constituents in % by weight: 0,05 % = Mg = 0,3 % , 0,008% = Mn = 0,3 %, 0,4 % = Fe = 1 %, 0,05 % = Si = 0,5 %, Cu = 0, 04 %, Ti = 0,04 %, unavoidable impurities individually being no more than 0.01 % and totaling no more than 0.05 % and the remainder consisting of Al.