Aluminum alloy support for planographic printing plate and method for producing the same

• US 5,779,824 A
• Filed: 07/20/1995
• Issued: 07/14/1998
• Est. Priority Date: 08/05/1994
• Status: Expired due to Fees

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Uesugi, Akio, Sawada, Hirokazu, Matsuki, Masaya, Sakaki, Hirokazu, Kakei, Tsutomu
• Primary Examiner(s): Simmons, David A.
• Assistant Examiner(s): ELVE, MARIA ALEXANDRA
• Application Number:
  US08/504,676
• Time in Patent Office: 1,090 Days
• Field of Search: 420/528, 420/537, 420/538, 420/529, 420/551, 420/548, 420/547, 148/437, 148/438
• US Class Current: 148/437
• CPC Class Codes: B41N 1/083 made of aluminium or aluminium alloys or having such surface layers B41N1/086 takes precedence
• CPC Class Codes: C22C 21/00 Alloys based on aluminium

Abstract

An aluminum alloy support for a planographic printing plate is disclosed, which is an aluminum alloy plate comprising 0<Fe≦0.20 wt %, 0≦Si≦0.13 wt %, Al≧99.7 wt % and the balance of inevitable impurity elements, wherein the number of intermetallic compounds present in the arbitrary thickness direction with in 10 μm from the plate surface is from 100 to 3,000 per mm² and the intermetallic compound has an average particle size of from 0.5 to 8 μm, with the intermetallic compounds having a particle size of 10 μm or more being in a proportion by number of 2% or less. Also disclosed is a method for producing the above-described aluminum alloy support.

Claims

1. An aluminum alloy support for a planographic printing plate, which is an aluminum alloy plate comprising 0<

Fe≦

0.20 wt %, 0≦

Si≦

0.13 wt %, Al≧

99.7 wt % and the balance of inevitable impurity elements, wherein the number of intermetallic compounds present in the arbitrary thickness direction within 10 μ

m from the plate surface is from 100 to 3,000 per mm² and the intermetallic compound has an average particle size of from 0.5 to 8 μ

m, with the intermetallic compounds having a particle size of 10 μ

m or more being in a proportion by number of 2% or less.

2. The aluminum alloy support for a planographic printing plate as claimed in claim 1, wherein the components of said aluminum alloy support contain 0≦

Ti≦

0.05 wt % and 0≦

Cu≦

0.05 wt %.

3. An aluminum alloy support for a planographic printing plate, which is an aluminum alloy plate comprising 0<

Fe≦

0.20 wt %, 0≦

Si≦

0.13 wt %, Al≧

99.7 wt % and the balance of inevitable impurity elements, wherein the intermetallic compounds contained in said aluminum alloy plate and having a particle size of 0.1 μ

m or less are present at a proportion of 0.5 wt % or more of all intermetallic compounds.

4. The aluminum alloy support for a planographic printing plate as claimed in claim 3, wherein the aluminum alloy support contains 0≦

Ti≦

0.05 wt % and 0≦

Cu≦

0.05 wt %.