JPS5948191A - Manufacture of metal plate for lithography - Google Patents

Abstract

PURPOSE:To form a metal plate for lighography, which is excellent in hydrophilic property, adhesiveness with an ink-philic substance, mesh point reproductivity, and printing durability, by a method in which an Fe plating is applied on a metal plate, and a secondary roughening treatment by anodizing or chemical treatment is applied to the plate. CONSTITUTION:An Fe plating or Fe-based plating of a thickness of 1-15mum is applied on a thickness of 30-250mum of a steel plate formed by a rolling method to obtain a metal plate having a surface roughness of 0.1-2mum and good hydrophilic property and good water holding capacity. A secondary roughening treatment using an anoidizing or ehemical etching method is then applied to the metal plate. Furthermore, a surface treatment, e.g., plating and a hydrophilic treatment as used in the conventional cases are applied to the metal plate. By the anodizing or chemical etching treatment, the crystal of the Fe plating is primarily roughened and the size of the crystal is also equalized, thus improving adhesiveness with ink-philic substances, mesh point redroductivity, and printing resistance of the metal plate.

Description

[Detailed description of the invention] Kikaimei is a hydrophilic 1-1, water-retaining 1'1, ink-philic material! Hei's +ii1 honey 171'lS halftone +1 effect and 0/durability 11;
This invention relates to a method of manufacturing a metal 11i for the 1st edition of the 1st edition.

゛1'1'fiil 1 version has hydrophilic +'l on the same 'l'-1 side (1 J1 image i1.4 so part and parent ink 1
1 is printed by providing an image part for 11 images in water, that is, 1/1 quality, that is, Y viewing water 1.
No. 1 is typesetting in −Jl′7; Generally, it takes charge of rV). 4 (Another 1.1 characteristic of the image area is that it is required to have water retention + J1. Therefore, 1.1 is applied to the sales metal plate using HFL metal material. Generally j
',' AI boards for O1-03 are used. In order to achieve the objective [described in 11j], the surface is made to have a water-retentive surface (by oxidizing or anodizing), and the surface is made to have a grain of <1. The anodizing treatment is effective due to the anchor effect, etc. due to the density of the ink-philic substance in the image area.For this purpose, the surface should be dense and uniform without any force surface. If the unevenness is uneven, the halftone dots (1) will be blurred.

However, the metal plate for printing plates with A5 base is
Since A6 is a change price, 1°l of A1 version is iW.
7. However, if you reduce the A4 size to -n, the mechanical 1. Y property is poor, generally 0.1 to 0. :3m
For example, only 17 of 0.3 mm are used for newspaper printing. Therefore, if the thickness is less than 0.3 mm, it can only be used for light printing. In addition, the e-plate can be mechanically or electrochemically +i
t) +'? b Next, hydrophilic treatment is treatment I-
The process is layered and complicated, and there are many patents related to these, but they have not been simplified yet. It is also a cause.

Mechanical there! For 1.14'l, it is less than the Ae plate <41. , and '4, FDLI steel plate it l:l
As a result of the 6.1 site inspection, the IiM shrine made of steel plate was found to be 1.
Song Dekatsu 11r1mi O, :3 mm O) A e l
? 711D's 1 mechanical 141 degrees (1t), it was found that Saiko could use 01's 1'/4, therefore, the surface of the steel plate was ・1゛ printing plate metal failure and Ap plate. Using a completely new method, I have found one person who is far superior to the A47 edition.

The non-invention is that the parent tree ('ki sukurure) and this hydrophilicity can be maintained over a long period of time without deterioration, and the adhesion with Xq ink 1/1 material a is excellent. Make the halftone dot [11 current 1'1 and +1liIl] ill l'l (the corner l to obtain the bent metal plate for planographic printing plate), 1!,
It is intended to serve as a gift.

The purpose is to use a steel plate with a thickness of 30~250//nl! , 5 nu or chemical etching
It is an inexpensive, hydrophilic 1゛1, water-retaining T'l, ink-friendly material that has been subjected to surface treatment by plating or chemical conversion treatment (9), and then subjected to a hydrophilic treatment that has been used since the 19th century. +lil adhesion of 111 substances, halftone dots)'+f! +'+ /e0' (1+4 +1i11!
This is the i method.

Below-1: Detailed explanation of non-invention.

゛ of the present invention
The metal plate is 17I made of steel manufactured by 11th grade.
It is a plate with a thickness of 30 to 250 pm. Next, by setting the lie or Ije to 11 minutes and adding a constriction of 1 to 1.571 m, the surface uniformity Ra (JIS 13 0601.) with good hydrophilicity and water retention is 01. ~21 rivers] can be obtained. 0.1pm
If it is too thick, the surface will be close to 1' smooth, and the hydrophilicity and water retention will not be sufficient. teeth?!
) can't be done. Net, ', (+'4 Current 1.1 and O-adhesion with ink-philic substances (?l) requires further secondary roughening.-1st roughening As a method, there is a method of electrolytically plating Fe or l'e as an L component, and then subjecting it to positive and negative treatment or chemical etching.As shown in Figure 1, only Fe plating ( Hydrophilic IJ1,
Fl the surface favorable for water retention 1'1, but positive i
I) Ill earth or IIs 'Fenochinog place J11
! I decided to do this.In Figure 2, there is a crystal with a 1.C rating, like a small zucchini.

l>, : fll lrl:, and the sizes of the 7-1 items are also made uniform.

Tree 1 Komaki;] (The feature of - is this, 11!, δ)
For this reason, the distance i'1 with Mr. Ino'V-1'l object ゛t'1
1'l, halftone dot 111 current +'l and O, printing durability 1'l is l1
13 to 11.

In the method of next surface treatment, when anodizing, Ill,
Jl (j is metal (1・ku no version and 4Cru 1111 no 11
．． Even in the song, (1) is 6 shaku on both sides. As the treatment 1lIt, Fe was divided into 1-1/bath, sulfuric acid bath,
Mixed bath of chloride bath and sulfuric acid bath, 11 liters of sulfur salt (Fe plating bath or 1000 alloy plating bath,
Or sulfur + *, j tray, wedge, nitric acid, phosphoric acid, etc. v]! 1!
A solution lIk with conductivity 1'1, such as 419 acid, is used.

In 11, 1.゛(・When using a plating bath, if the same bath as Fe plating is used, the process can be done in the same tank, and the change in the composition of the anodizing solution due to the elution of iron.
It is also easy to process liquids. At this time, 1・e
1.1 If there is a river, yang 4) i place' 111 means that Fe is I'e iJ7- (ji-f mouth' + L, 'C, this)' ° The route is l'c M)-) (j1 molten 4-1 anode or 1 e plating) be. Also f+%f acid,
Salt] When anodizing in an inorganic acid such as 1 chloride or nitric acid, 1.e plating (pickling treatment of the yarn becomes unnecessary,
11! , one culm is simplified, but has the drawback that Fc ion is accumulated in the bath, making bath management difficult. For the anodizing process, the limit is 1 coulomb/cl n12 where secondary surface roughening occurs, and the upper limit is 475 energization amount with Fe plating or J'e being 11 min. It is best to process it. The temperature of the anodizing solution may be in the range of ylllf degrees above the boiling point of the room. Other moxibustion treatments can be selected depending on the purpose.

In the case of a chemical etching process, the processing liquid is hydrochloric acid, sulfuric acid, nitric acid, in that order, or a strong corrosive solution such as ferric chloride or ferric sulfate. It's good to have. In particular, the combinations of Fe plating If material and etching solution are: chloride bath and hydrochloric acid or ferric chloride solution, sulfuric acid bath and sulfuric acid or sulfuric acid 2J/ j Etching l using Shunwo (k, Fe plating l1 without waste liquid treatment?
It is possible to use both for supply and °C. In addition, a solution using a Fe tray does not contain impurities and bath management is easy. next,
When an acid such as sulfuric acid, hydrochloric acid, or nitric acid is used, the pickling culm of li'e plating ((() becomes unnecessary, and one culm is simplified and preferred. ,,11.
11. The processing time is particularly limited and can be selected depending on the requirements.

Next, just by roughening Hrl llV, +
1i+ has poor eating habits and produces red rust, which is undesirable.
It is preferable to apply a surface treatment to the steel plate.
11 of metals such as r, Ni, Sn, Cu, and Zn
Plating processing methods such as single-layer plating, multi-layer plating in which 2 or more of these metals are combined, and alloy plating containing one or two of these metals, or chromate , Nail chromate, phosphate, molybdate, silicate, boric acid 1fim, +Ii6 borate, aluminate etc. There is.

Such surface treatment not only improves corrosion resistance (Improvement of the image area forming the image area)
It also works effectively on 1'1. When plating on 1, Y, it is also effective to make the surface 11E plane. - Smooth plating strip ('1
The F limit is that the plated strips are more uneven than the surface (the thickness of the plating is such that the corrosion resistance of the steel plate is guaranteed to be 1.1%). It is economical to set the thickness as follows.It is not necessary to make the thickness unnecessarily thick for cheap metals such as Zn (for expensive metals such as C+ or N1).

Some of the gold AJ≦ that has been surface-treated with the aforementioned surface roughness exhibits hydrophilic properties and can be used as a plate as is, but many of the surface-treated metal strips do not have sufficient hydrophilic properties. Moreover, since the deterioration of the punch 11 and y of the hydrophilic t1 is significant, the treatment J111 is performed again in Xl1). The hydrophilic treatment may be carried out by commonly used known methods, such as silicate treatment, secondary ditanium compound treatment, phosphoric acid treatment, ferrocyanophene/chemical treatment, and galvanic acid treatment.
Grain treatment, Litta/Guste/Acid treatment, polyacrylic acid or C
MC etc. right b'l I'b molecule 1￥L processing or ql
Treatment with Hlil compound Glue is included and currently '++:
There is nothing to be done.

Hereinafter, in 1/Example, JJ and I will explain.

Actual l1111 example 1 11f1mi l 00 //III C+) II extension A4
"Fe ions were added to the foil as L1"), A t? 1, on one side at a temperature of 98°C and a current gradient of 10Δ/ +l +o
1・e plating 1/7111 was applied at
dm'' was anodized to 10'' (with a surface roughness of 0.17 mm and an average surface roughness of 0.41 mm). A current density of 40 k/dn?
2. Plated with aluminum nanol (A, S-200, manufactured by Nissan Chemical) with an average particle size of 50 nm, containing 20 f//1 ζlf'&, with steel foil as a cathode, and 0.1 A
/d? ? 11) Example 2 1° fI 25 (One side of a 171 m long steel plate was ferrous chloride 1,1 (!plating 10μ
m alms, 40°IJe,? 111th IJ,',+tl
'C(J)I'! , A IIZ ; Etching was carried out by immersion in di-iron solution, and the surface average roughness was 21 kawal.
It was expanded to 111 pages.

Using a salt bath, ++lA Iu4
50' C1 ton, density 5A/+l n? pot 11
So, Zll is 27th -] Kish, ・]' 1Y-1
(] On+n(7)Cr Nor2 0 t/(1
, ri/('J 0.5 V/el:!: Cancellation in solution, drying and printing metal (IV, 11).

Example 3 Ferrous sulfate 4+10 on one side of a 30 μm steel plate
f/e, ammonium sulfate 100 f/l, nickel sulfate 50 V
Using a plating bath containing #, temperature: 70℃, current: W1''
Fe-Ni plating was performed to a thickness of 1571In under the conditions of JLL 5 A/(lyH', and further 1:7
0 l//l (D in sulfuric acid solution, 'tli, rt density 1 () AltJ door, treatment time 30 seconds anodizing l; 11. , Denshiri $ Hatake'j history 5 Ni under the conditions of A / (l H)H'
was plated to a thickness of 1 μm. Arapia to this: 1 mu to 0.5
After coating in μm, it was dried and a metal plate for printing was given R1.

Comparative Example I Plate thickness: 2007 zm, average surface roughness: 0.5 //II+'t1/+1 plate was subjected to surface treatment with Cr plating and hydrophilic treatment similar to Example 1 without roughening treatment. was applied.

Comparative Example 2 A steel plate with a thickness of 100 μm and an average surface roughness of 0.05 μm,
The same hydrophilic treatment as in Example 1 was performed without roughening or surface treatment.

Comparative Example 3 Using the same steel foil as in Example 1, only the same Fe plating as in Example 1 was applied, and the same Cr plating and hydrophilic treatment as in Example 1 were applied without secondary roughening treatment. Comparative Example 4 Commercially available Aj7 base plate making mill.

In order to evaluate the adhesion resistance of ink-philic substances, a force-type photosensitive liquid such as "Nino Kagaku Kogyo 11" was applied and dried. The case where it peeled off was marked as ×.The results are shown on Sl-ro Table 1 Evaluation Results Regarding the printing metal plates of Examples 1 to 3 and Comparative Examples 1 to 4
A negative photosensitive resin (manufactured by Ueno Kagaku Ichigyo Co., Ltd.) is applied to these, and the image pattern is printed with ultraviolet light (P') and developed.
Got the image. When printing tests were conducted on the plates created in this way, no abnormality was observed in Examples 1 to 3 even after printing 50,000 sheets, but Comparative Example 1.2 did not show any difference when printing 50,000 sheets. The image peeled off after printing. Some images peeled off in Comparative Example 3 and 20,000 sheets in Comparative Example 4 and 40,000 sheets, respectively.

[Brief explanation of drawings]

A (Figure 1 is an electron micrograph 1'B (x l 500 ) of the surface coated with do(! plating 45//nl;
Figure 2 is an electron-10 microscopic copy of the In-eluted surface LT (x 15 ( L O
). 518

Claims (1)

[Claims] A steel plate with a surface roughness of 30 to 250 pm is subjected to tightening using 1.e of O1 to 21 river 1 or Fe as a top layer, and then subjected to anodization or chemical treatment. 1. A method for manufacturing a metal truss for I'll edition, which is characterized by subjecting it to a phase curve treatment.