JPS5848056A - Method and device for developing of image forming material - Google Patents

Abstract

PURPOSE:To develop image forming materials such as carbon black satisfactorily by rubbing the surfaces of the image forming materials by means of rubbing materials at 0.1-20m/cm rubbing density per unit length and width. CONSTITUTION:While the image forming materials fed to a developing mechanism 2 are conveyed by a conveying mechanism 3. The rubbing effect by the spraying of processing liquid from spray nozzles 22, 23, 24, and the forward or backward revolutions of rubbing rollers 40, 41, 42 in successtion to said nozzles is applied on the surface of the image forming materials for plural stages. Here, the surfaces of said image forming materials are rubbed at 0.1-20m/cm rubbing density per unit length and width thereof. Thus the image forming materials provided with the image forming layers contg. light absorptive and endothermic dyes and pigments such as carbon black are developed satisfactorily.

Description

DETAILED DESCRIPTION OF THE INVENTION (2) The present invention relates to a method and apparatus for developing an image forming material used as a mask for plate making, a printing plate, etc.

Recently, printing plate materials, etc., in which a wI image forming layer containing light-absorbing or heat-absorbing dyes and pigments such as carbon black, or photosensitive substances such as quinone diazides, nitro compounds, and diazoresins are laminated on a substrate, have recently been developed. The image forming layer is used as an image forming material, and the image forming layer is subjected to image exposure.
The image area, or in the case of a negative type, the non-image area that has not received light, is removed and developed in the presence of a developing solution such as water, an alkaline ice solution, or an organic solvent. By forming an image and then going through a cleaning process, gumming process, etc., it is possible to create a mask for plate making or printing #i.
Techniques have been developed to obtain the following.

Among the above series of processing steps, non-I in the image forming layer
i! The development process that removes 1 part of 11g can be carried out by placing a brush roller in the conveyance path of the image forming material and utilizing the abrasive action of the brush roller (3), or by spraying a developing solution onto the image forming layer. One-way shower systems have been put into practical use that use the impact to remove dust.

By the way, in case 1 of developing an image forming layer containing a photosensitive material η of quinone diazides, since non-image areas of the image forming layer are dissolved by the processing solution supplied with 14, it is necessary to reduce the rubbing action of the brush roller. When used together, the non-image area becomes an image fi'f'@! due to the impact from the jetting of the developing solution. However, when developing an image forming layer containing dyes and pigments such as carbon black,
In the presence of the non-image area developing solution, the film simply takes on a swollen shell without dissolving, and the strength of the film is high, so development may not be carried out satisfactorily. In other words, in the method using brush roller sound, the entire surface of the non-image area is not uniformly rubbed, but the tip of each flocked hair is rubbed locally, so that a part of the non-image area is rubbed locally. is not removed from the substrate, and as a result, uneven development may occur or development may not be carried out well in small areas.1) Since the removing force is small in the one-way shower system, The non-image areas cannot be removed sufficiently, especially the mesh. When it is formed on both image forming layers, it is difficult to remove the aspiration.

The present invention was developed based on the above-mentioned circumstances, and was made as a result of research into the thick abrasion density of the abrasion portion H on the surface of an image forming material such as a printing plate material. The development processing power of an image forming material that can perform good development processing of an image forming material that has an image forming layer containing light-absorbing and heat-absorbing dyes and pigments such as aims to provide;
The feature is that the image forming material development method includes a scratching development step in which the surface of the image forming material to be developed by rubbing is rubbed with a rubbing member in the presence of a developing treatment solution. In this method, the surface of the image forming material is rubbed by the rubbing member at a contact density of 901 to 20 m/cx per unit length of the material.

(5) A further object of the present invention is to provide a developing/processing device that can more reliably remove scratches from non-image areas with high work efficiency using this method, and is characterized by a conveyance mechanism that conveys an image forming material to be developed along a conveyance path; and a plurality of developing rubs p=, which are sequentially arranged on the conveyance path and are brought into pressure contact with the surface of the image forming material.

The surface of the image forming material is rubbed by the rubbing roller at a contact density of 01 to 20 m/cm per unit length and width.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The method of the present invention will be explained below with reference to the drawings, together with the apparatus suitably used therein.

FIG. 1 shows an embodiment of an apparatus used in the image-forming material development method according to the present invention. a swelling mechanism 1 that swells the image forming layer with a processing liquid;
This swelling mechanism 1 is used to transport the image forming material.
#A developing mechanism 2 that develops the surface of a forming material in the presence of a developing treatment solution and a cleaning mechanism 5 that cleans the front (6) surface of the image forming material from this developing mechanism 2 are provided in this order. Ru.

The swelling mechanism 1 includes a swelling tank 11 that stores a processing liquid such as water, an aqueous alkali or silicic acid solution, an organic solvent, and an oxidizing agent liquid;
An introduction roller 12 and a discharge roller 13 provided at the entrance and exit sides of the swelling tank 11, respectively, and a guide member that guides the image forming material to be immersed in the processing liquid between the introduction roller 12 and the discharge roller 13. It consists of 114.

The developing mechanism 2 includes a mechanism 3 capable of storing a similar processing liquid;
Ii! arranged sequentially along the conveyance path P below the conveyance path P! Ii A plurality of (
In the illustrated example, there are 3) developing scratching rollers 40.4L42
and liquid injection nozzles 22, 23, and 24, which inject and supply processing liquid onto the image forming material immediately before each of these rubbing rollers 40, 41, and 42. The transport mechanism 3 includes transport ports (7) provided at the inlet and exit sides of the processing liquid tank 21, one 33 and 34, and the respective rubbing rollers 40, 41, 4.
It consists of a pressure roller 30s 31.32 which is in contact with the roller 2 and applies a controlled pressing force thereto, and an auxiliary conveyance roller 35 which is provided as appropriate. Said rubbing roller 40.4
1.42 A material having a surface layer made of a flexible porous material having liquid absorbing properties such as urethane foam is used, and the lower part thereof is immersed in the processing liquid in the processing liquid tank 21. , the pressure rollers 30, 31, and 32 on the image forming material are also smaller than the pressure applied to the conveyance rollers 33, 34.

The cleaning mechanism 5 includes a cleaning tank 51 that stores water or other cleaning liquid, an introduction roller 52 and a discharge roller 53 provided at the entrance and exit sides of the cleaning tank 51, respectively, and the introduction roller 52.
A guide portion 54 is provided between the image forming material and the discharge roller 53 to guide the image forming material to be immersed in the processing liquid.

The figure shows the LT liquid storage tank.

For a device with this configuration, an example is shown in Figure 2 (a).
As shown in FIG. 3, the photosensitive image forming material 6, which has a photosensitive image forming layer 60 containing carbon black formed on the left plate 61, is placed in a swelling machine fa1 with the photosensitive surface facing downward.
When exposed to light using a positive type image forming layer, the non-image area N that received the light is immersed in the processing liquid in the swelling tank 11, and the non-image area N that received the light is also exposed to the negative type image forming layer. When exposure is carried out using the photosensitive material, the non-image area N which does not receive light is swollen and then sent to the developing mechanism 2. The image forming material sent here is conveyed by the conveyance mechanism 3, and the treatment liquid is jetted from the jet nozzles 22, 23, 24, and the abrasion rollers 40, 41, 4 are applied.
The abrasive action of rotation in the forward or reverse direction of 2 is applied to the surface of the imaging material in multiple stages. This abrasive action is caused by the injection nozzle 22, 23, 24,
Scraping rollers 40.41.42 from the egg wash and treatment liquid tank 21
As a result, the swollen non-image area N of the image forming layer 60 is removed as shown in FIG. 2(B).

The image-forming material is then sent to the washer wt5, where the image forming material is
) The cleaning member 54 is immersed in the cleaning liquid in the cleaning tank 51 to be cleaned, and as a result, the image forming layer remains on the image forming material only in the image area.

Here, the surface of the image forming material is rubbed by the above-mentioned rubbing rollers 40, 41, 42 so that the value of the contact density determined by the following equation (1) is 0.1 to 20 m/α. 2 Contact density = □×] ...(1) ■1 A9, L 1 ■1-Transportation speed of image forming material (cm/sec).

(2) Contact speed of the rubbing roller (m7 seconds) = Circumferential speed of the scraping roller (m7 seconds) Conveying speed of both image forming materials (m7 seconds) n = number of rubbing rollers. The sign of the image-forming material transport speed term in the formula for calculating (2) above is positive when the rubbing roller rotates in the forward direction, and negative when it rotates in the reverse direction.

Therefore, the above development processing method is applicable to image form 18!1. Since the surface of the material is rubbed by a scraping roller at a contact area (10) density of 901 to 20 m/cm per unit length and width, carbon black An image forming material having an image forming layer containing a light absorbing or endothermic dye or pigment such as the above can be satisfactorily developed and can have high image reproducibility.

In the present invention, in order to achieve the above-mentioned abrasion, only one abrasion roller 'fr may be disposed on the conveyance path of the image-forming material, or the colossal image-forming material is fixed and the surface of the image-forming I217tA material is The image may be rubbed by a plurality of horizontally rotating scratching members, but according to the apparatus configured to arrange multiple scraping rollers along the front F conveyance path as in the above-mentioned embodiment, the image The image forming material can be processed with high work efficiency because the developing force can be applied while conveying the forming and VC1 image forming materials. Since the non-image area is subjected to abrasion, the abrasion removal of the non-image area can be performed more reliably, and in addition, each abrasion roller can be made of a small diameter, so that the device (11) can be made more compact. I can do it.

When carrying out the process, the contact speed of the rubbing member should be set at 005 to 2.
m/sec, the pressure contact force between the image forming material and the abrasion member is 1 to 20
V
It is preferable that the time until the end of rubbing is 5 to 500 seconds, and further, the contact speed is 01 to 1 m7 seconds, the pressure contact force is 5 to 100 g/cn1, and the contact time is 10 to 100 seconds. At the same time, the degree of contact in ij is 0.2 to 10 m/C1
It is even more preferable to set the value to 11.O In addition, in the key invention, as shown in FIG. 3(a),
fi! on the board 61! ] Using an image forming material 6 formed by laminating an image forming layer 60' and further forming a photoresist layer 62 on the surface thereof, the photoresist layer 62 is subjected to image fII exposure, and then the photoresist layer 62 is exposed. The non-image area N is rubbed with a rubbing member and developed, thereby forming a relief image of the photoresist layer 62 as shown in FIG. Alternatively, the non-image area N of the photoresist layer 62 and the portion of the image forming layer 60' facing the non-image area N may be rubbed together with a rubbing member, as shown in FIG. 3(C). It is also possible to form a relief image on the substrate 61.

The image forming material processed as shown in FIG. 3(B) is then used as a mask for plate making by etching the exposed portion of the image forming layer 60'. The layer 60' may be composed of a metal vapor deposited layer or the like.

Furthermore, the image forming material used in the present invention is not limited to materials on which an image is formed by projecting light, heat, or electrons on the surface, and may include materials that are not soluble in the developing processing solution. Sex paint [Yoru II! It is also possible to invert the image Ii, in which case the surface layer to which the paint has not been applied will be rubbed off.

Next, in the apparatus shown in FIG. 1, using a rubbing roller composed of a sponge-covered roller, and setting the pressure contact force between the rubbing roller and the image forming material to 50 g/cm, the diameter of the rubbing roller, the number of rubbing rollers, Developing a water-developable image-forming material consisting of an image-forming material made of carbon black and a binder with a negative-type photoresist layer under the conditions of the rotation speed of the abrasion roller and the conveyance speed of the image-forming material. When the treatment was carried out, the results shown in Table 1 were obtained.

In Table 1, (1) represents the conveying speed of the abrasive material for forming one image, (d) the diameter of the rubbing roller, (R) the number of rotations of the rubbing roller, and (nt) the number of rubbing rollers.

(14) Table 1 (15) The symbols in the results have the following meanings: 〇〇...The obtained images had extremely high reproducibility and were fully satisfactory.

△... ri obtained! Although the reproducibility of the 7i image was somewhat low, it was usable for practical use.

×...The obtained image has low reproducibility and is difficult to put to practical use.

As a result, the contact density (as mentioned above, the contact density is determined by the diameter of the scraping roller, the number of scraping rollers, the number of rotations of the scraping roller, and the conveyance speed of the image forming material) is 0. ．．
1 to 2 (1 m/cm), it is possible to obtain a practically usable image, but it is understood that it is difficult to obtain a practically usable image outside this range.

As described above, according to the present invention, image forming materials such as printing plate materials having image forming layers containing light absorbing and heat absorbing dyes and pigments such as carbon black can be successfully developed. Accordingly, it is possible to provide a developing processing method and apparatus that can obtain high-quality images.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a developing device for image forming materials suitably used in the method of the present invention, and FIGS. FIG. 1...Swelling mechanism 2...Developing mechanism 21...
- Processing liquid tank 22.23.24... Processing liquid spray nozzle 3... Conveyance mechanism 33.34... Conveyance roller 30.31
．． 32... Pressing roller 40.41.42... Scratching roller 5... Cleaning mechanism 6... Image forming material 60
．． 60'... Image forming layer 61... Substrate 62...
Photoresist layer agent Patent attorney Masahiko Oi
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Claims (1)

[Claims] 1) Scratch the surface of the imaging material to be developed with 'f
In the development processing method for an image forming material, which includes a scratching development step in which development is carried out by rubbing with a scratching member in the presence of an image processing solution A, the surface of the image forming material J is .1~20m/? , a developing treatment for a bleached image forming material fM1 characterized in that the image forming material is rubbed by the rubbing member at a contact density of n. and,
1. A plurality of developing abrasion rollers are sequentially arranged on the transport path and pressed against the surface of the tijii image forming material, and the surface of the image forming material has a width of 01 to 20 m per unit length and width. A developing processing apparatus for an image forming material, characterized in that the image forming material is rubbed by the above-mentioned rubbing roller at a contact density of /c+a.