JP2002189278A - Rubber roller for conveying silver salt photosensitive material and development processing device arrayed with same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rubber roller having high mechanical durability to prevent rapid peeling of rubber material i.e., ethylene propylene rubber (EPDM), which is excellent in the characteristics to the deterioration in reduction of a processing liquid, but is poor in the mechanical durability and is adhered to a metallic shaft from the metallic shaft by eliminating such state that the conveyance function of the photosensitive material in the development processing device is drastically obstructed by peeling of the rubber material from the metallic shaft and the failure in the development processing is resulted and the development processing device fitted therewith. SOLUTION: The rubber roller is manufactured by subjecting the metallic shaft to primer coating and finish coating of 'Chemlok 205 (R)' and 'Chemlok 238 (R)' which are the products of Lord Far East Incorporated as the adhesives between rubber and metal in this order and vulcanization molding the ethylene propylene rubber (EPDM) thereon and is used to thrust and nip the silver salt photosensitive material and to convey the material inside and out of the processing liquid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing apparatus for developing a silver halide photosensitive material, particularly a negative color film, and a rubber roller used for the developing apparatus.

[0002]

2. Description of the Related Art In a processing apparatus for developing a silver halide photosensitive material, for example, a developing process is performed while a photosensitive material such as a color negative film is transported in a processing tank for developing, bleaching, fixing and stabilizing. Is a configuration in which a roller pair pressed against a rubber roller is driven to be arranged in a conveying path of the photosensitive material, and the photosensitive material is conveyed in the processing solution by the rotation of each of the nipped rollers, dried and developed. Material is to be recovered.

[0003] The physical properties of the rubber roller are not changed by each processing liquid in each processing tank of the developing processing apparatus.
Ethylene propylene rubber (EPDM) is used as a substance that does not elute these obstacles in order to prevent the processing solution from contaminating and deteriorating and causing fogging and various processing defects on each photosensitive material to be processed. What is vulcanized and adhered to the shaft is used.

[0004]

Although the photographic performance of the photosensitive material processed in this way is maintained stably, the durability of the rubber roller is poor, and the rubber material adhered to the metal shaft, namely Ethylene propylene rubber (EPDM)
In some cases, the photosensitive material was peeled off and the function of transporting the photosensitive material in the development processing apparatus was remarkably impaired, thereby making development processing impossible.
The occurrence of such a condition sometimes occurred in a short period of about one year after the start of operation. Especially, this peeling is more likely to occur than the rubber roller completely immersed in the liquid.
The rubber roller at the gas-liquid interface between the processing liquid and the air is more remarkable.

[0005] The present invention eliminates the above-mentioned obstacles.
A highly durable rubber roller that does not cause ethylene propylene rubber (EPDM), which is an excellent rubber material that does not cause deterioration of the processing liquid to degrade, to be removed from a metal shaft in a short period of time, and a developing device equipped with the rubber roller. The goal is to provide

[0006]

This object is achieved by any of the following technical means (1) to (6).

(1) As an adhesive between rubber and metal, two different types of adhesives are applied to a metal shaft in two layers of an undercoat and an overcoat, and then ethylene propylene rubber (EPDM) is applied thereon. A rubber roller manufactured by vulcanization molding, wherein the rubber roller is a roller that presses and nips a silver salt photosensitive material and conveys in a processing liquid or a gas-liquid interface thereof.

(2) The rubber roller according to item (1), wherein the treatment liquid is a treatment liquid containing a hydroxylamine derivative, sulfurous acid, ethylene glycol, triethylene or the like.

(3) The two types of adhesives are products of Lord Far East, Inc.
The rubber roller according to (1) or (2), wherein the rubber roller is a hemlock 205 and a chemlock 238.

(4) The material of the metal shaft is SUS316
(1)-(3)
The rubber roller according to any one of the above items.

(5) The rubber roller according to any one of (1) to (3), wherein the material of the metal shaft is a titanium material.

(6) A developing apparatus wherein the rubber rollers according to any one of (1) to (5) are arranged in a conveying path in each processing tank.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic structural view of a developing apparatus and a rubber roller mounted thereon according to the present invention, FIG. 2 is a partially enlarged view of a conveying section, and FIG. 3 is a front sectional view of the rubber roller. It will be described using FIG.

The developing apparatus 1 includes a photographed film loading section 20, a color developing tank N1, a bleaching tank N2, and a fixing tank N3-.
1, N3-2, the processing unit 30 including the processing tanks of the stabilizing tanks N4-1 and N4-2, and the drying unit 4 including the drying rack N7.
0, a collecting section 50 for collecting the developed photosensitive material, and a transport mechanism 60 for forming a transport path for sequentially transporting a film as the photosensitive material between them.

In the film loading section 20, a 135-type photographed film containing a patrone is fed out of the patrone at a loading position 21 along a transport path formed by a pair of rollers and guide rails, and the terminal is cut by a cutter. On the other hand, 110-type and APS-type films differ in width from 135-type films and are small.
When a short leader having a width of 5 mm is adhered to the leading end, the short leader is conveyed through the film loading unit 20 while being guided from another loading position 22 to another guide rail, and exits the loading unit 20 and enters the processing unit 30. Thus, the respective photosensitive materials are conveyed along a common conveyance path 61.

Next, the transport mechanism 60 will be described. A drive roller 63 having a hard surface and a rubber roller 64 having a soft surface are pressed into contact with each other to form a plurality of roller pairs, and guide rails 62 are arranged between adjacent roller pairs. While being guided by the rail, the roller pair is nipped by the roller pair to transmit the rotational conveyance force, and a gas-liquid interface is formed in the processing liquid in each of the tanks N1 to N4-2 of the processing unit 30 and at a transition portion to the next tank. The rubber roller 64 comes into partial contact with the processing liquid.

As shown in FIG. 3, the rubber roller 64 is formed by applying an adhesive 66 to a metal shaft 65, drying the adhesive, and vulcanizing and molding ethylene propylene rubber (EPDM).

According to observations made by the present inventors, the rubber layer 68 peels off in a short period of time of about one year in the past because there is much peeling between the metal shaft 65 and the adhesive layer 66, and the adhesive layer 66 and the rubber layer It has been found that there is almost no delamination between layer 68.

The necessary condition of the adhesive is such that the adhesive does not react with the processing solution to degrade the processing solution and lower the photographic performance of the photosensitive material. That is, the adhesion can be stably maintained for a long time. There are an extremely large number of adhesives for bonding metal and rubber, and its selection is very difficult. Furthermore, the processing solution used in the development processing apparatus is pH
In the range of 4 to 11, and it is extremely difficult to select an adhesive that is durable to these processing solutions. The inventor of the present invention has made an adhesive maker Lord Far East, Inc. (product name Chemlo).
k, hereafter sometimes referred to as kamlock in katakana),
Among those manufactured by Toyo Chemical Laboratory Co., Ltd. (product name METALOK) and the like, which are expected to have good adhesiveness, those were selected and extracted, and finally several kinds were selected from Table 1 as shown in Table 1.

[0020]

[Table 1]

As the metal of the metal shaft 65, SUS316 and titanium, which are conventionally known, which are durable with respect to the processing solution, are selected. As a first step, the adhesive is applied to the metal shaft as shown in FIG. As shown in FIG. 4 (b), only one layer is applied and dried, and as shown in FIG. 4 (b), an undercoat layer 66-1 and an overcoat layer 66-2 are separately applied and dried. The surface condition was determined by performing a treatment resistance test of the adhesive itself (alone). Hereinafter, when each of the adhesives is divided into two layers and used, it is expressed as “adhesive of the undercoat layer + adhesive of the overcoat layer”.

In the above test, the current Chemrock 250
Metalloc PH which showed relatively good performance compared to
A test piece of ethylene propylene rubber (EPDM) based on JIS K 6256-1993 is used for 20 + Metalock FC, Chemlock 205 + Chemrock 250, Chemlock 205 + Chemlock 238, etc.
An adhesive performance test was conducted by vulcanization bonding at 65 ° C. for 15 minutes. The vulcanized adhesive sample was placed in a processing solution as a running solution of an automatic development processor QDF-32 manufactured by Konica Corporation.
It was immersed at 0 ° C. for 14 days to examine the adhesive strength. Such a treatment liquid is a treatment liquid containing a hydroxylamine derivative, sulfurous acid, ethylene glycol, triethylene, or the like, but is not limited thereto. As the temperature of the treatment liquid increases, the treatment liquid deteriorates rapidly with time, and the activity decreases. Therefore, the test liquid was replaced with a new liquid once every 3 to 4 days for the test. Of course, the tests were performed in closed containers to prevent oxidation degradation by air. The results were as follows in the order of their superiority.

1st place Chem Rock 205 + Chem Rock 23
8 Ti 2nd place Chemlock 205 + Chemlock 238 SUS 3rd place Metalloc PH20 + Metaloc FC Ti 4th place Chemloc 250 SUS In addition, the test of immersion at 60 ° C for 14 days is a severe test, and it should have enough durability for at least 2 years or more. Is a substitute test equivalent to.

The above results will be described in detail in the following order. First, the sample material is 6mm in diameter and 70mm in length
SUS316 and Ti shafts were washed with toluene for 5 minutes, and the above-mentioned adhesives were applied to the shafts of these materials either individually or in two layers of undercoat and overcoat at 165 ° C. for 15 minutes. The test piece No. of the shaft with adhesive dried at 1 to No. Sample No. 13 was prepared. Sample No. 13 was prepared between these immediately after preparation and each of the N1-N4 treatment solutions at 60 ° C. 6H, 1 day, 4 for 1-4
After 5 days of immersion, sample No.
For 5-13, 3 days, 5 days, 8 days, 9 days, 12 days,
After 14 days of immersion, a surface scratch test was performed. When the results are summarized, the former is as shown in Table 2, and the latter is as shown in Table 3 and subsequent Table 4.

[0025]

[Table 2]

[0026]

[Table 3]

[0027]

[Table 4]

Table 2 shows the combinations of undercoat and overcoat in which all of the immersion samples of the processing solutions N1 to N4 were kept hard without peeling and did not cause discoloration. Metallock PH20 + Metalock FC of Sample No. 4 is good, and among those shown in Tables 3 and 4, Sample No. 4 12
Of Chem. No. 205 and Chem. 11 Chemlock 205 + Chemlock 2
No. 38 is a good combination. It can be seen that it is much better than the first Chemlock 250.

A phenolic resin-based undercoating adhesive was also tested, but it did not have any treatment liquid resistance and could not be used.

Next, a test of the adhesive strength of the coated and dried adhesive having a good durability with respect to the treatment liquid will be described. SUS3 with a smooth surface as a test piece
16 and 20 mm diameter discs each coated with a single adhesive or with two layers of undercoat and topcoat, to make two each, and apply them to both sides of about 3 mm thick ethylene propylene rubber (EPDM). A test piece which was vulcanized and bonded at 165 ° C. for 15 minutes was prepared, and was subjected to JIS K 6256-.
Based on 1993, 200m when attached to a tensile tester
Pulling was performed at a pulling speed of m / min, and an elongation / stress curve was obtained to determine the strength of the adhesive force. Table 5 shows the measurement results.
It is as shown in.

[0031]

[Table 5]

The evaluation criteria were as follows. A sample having a maximum stress of about 980 N or more and an elastic deformation portion having a normal elongation / stress curve is indicated by ◎. The maximum stress is about 392 N to 980.
When the elongation / stress curve has a normal elastic deformation portion, the maximum stress is less than about 98N to 392N, and when the elongation / stress curve has a flat upper part and there are difficulties, the maximum stress is about 98N. When the elongation / stress curve was less than about 392N and had an irregular mountain / shaped curve and had difficulty, x was used when the maximum stress was less than about 98N or less and the elongation / stress curve was abnormal.

In the case of the evaluation of 破 断, most of the rupture locations were not at the bonding surface but at the rubber material itself. That is, even if the adhesive strength is further increased, it exceeds the maximum strength of the rubber material and sufficiently exceeds the necessary adhesive strength. Conversely, in the evaluations XX, X, and 多 く, most of the rupture locations are adhesive surfaces, and the adhesive strength is clearly insufficient.

Table 6 shows that the metal shaft 65 is made of SUS 316 and the metal shaft 65 is made of T.
Table 7 shows i.

[0035]

[Table 6]

[0036]

[Table 7]

For both SUS316 and Ti, the combination of Chemlock 205 + Chemlock 238, which was higher in the combination of Tables 3 and 4, was the best, and then Chemlock 205 + Chemlock 250 was the best. This is the reverse of the test result of the treatment liquid resistance of the adhesive itself (alone) with the first and second ranks. This is considered to be due to the synergistic effect that even though the treatment liquid resistance is somewhat poor, the treatment liquid resistance is improved and the adhesive strength is improved by vulcanizing and bonding ethylene propylene rubber (EPDM). In Table 2, METALOK PH20 + METALLOK FC, which was good, had poor adhesive strength as a whole.

Incidentally, in order to improve the adhesion between the metal shaft and the adhesive, a comparison was generally made between those which had been generally sandblasted and those which did not, but almost no difference was observed. The reason is that, as described above, when a tensile test is performed using a test piece using an adhesive having a strong adhesive force, the fracture occurs in the rubber material, and the fracture does not occur in the bonding surface. Therefore, it is considered that a difference due to the surface shape of the bonding surface does not occur.

Chemlock 205 is 60-65% of methyl isobutyl ketone, 10-15% of xylene, 1-5% of ethylbenzene, 1-5% of carbon black,
The synthetic resin adhesive is a mixture of titanium oxide of 1 to 5%, silica of 1 to 5%, and synthetic resin of 10 to 20%, and Chemlock 238 contains xylene of 60 to 65%.
%, Ethylbenzene 20 to 25%, chlorinated paraffin 1 to 5%, carbon black 1 to 5%, and polyolefin or the like in a mixture of 10 to 20%.

[0040]

The rubber roller according to the present invention can withstand a severe test in which the temperature of the processing solution is 60 ° C. and immersed for 14 days. Further, the rubber roller can be used as an automatic development processor QDF- manufactured by Konica Corporation. Attachment No. 32 and a continuous rotation test with the processing liquid temperature set to 50 ° C. as an accelerated test showed that the peeling of the adhesive proceeded considerably in 1000 hours for the conventional product, but did not occur for the improved product at all. . The rubber roller of the present invention can be used for a long period of time without peeling and breaking or deteriorating the quality of the processing liquid. Can now be carried out.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an example of a developing apparatus to which a transfer rubber roller according to the present invention is attached.

FIG. 2 is a partially enlarged view of a photosensitive material conveying section in FIG.

FIG. 3 is a front sectional view of an example of the rubber roller of the present invention.

FIG. 4A is a front sectional view showing a state where one layer of an adhesive is applied to a metal shaft, and FIG. 4B is a front sectional view showing a state where two layers of an adhesive are applied to a metal shaft.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Developing apparatus 20 Film loading part 30 Processing part N1 Color developing tank N2 Bleaching tank N3-1, N3-2 Fixing tank N4-1, N4-2 Stabilizing tank 40 Drying part 50 Recovery part 60 Transport mechanism 61 Transport path 62 Guide Rail 63 Drive roller 64 Rubber roller 65 Metal shaft 66 Adhesive (adhesive layer) 68 Rubber layer

Continued on the front page F term (reference) 2H098 AA01 AA05 CA02 CA09 CA11 3J103 AA02 AA12 BA41 EA07 FA10 GA02 GA32 HA03 HA06 HA33 HA35 HA53

Claims (6)

[Claims] As an adhesive between rubber and metal, two types of adhesives of different types are applied to a metal shaft in two layers of an undercoat and an overcoat, and an ethylene propylene rubber (E) is coated thereon.
A rubber roller manufactured by vulcanizing PDM), wherein the rubber roller is a roller that presses and nips a silver salt photosensitive material and conveys in a processing liquid or a gas-liquid interface thereof. 2. The rubber roller according to claim 1, wherein the treatment liquid is a treatment liquid containing a hydroxylamine derivative, sulfurous acid, ethylene glycol, triethylene or the like. 3. The two adhesives are a product of Lord Far East, Inc.
The rubber roller according to claim 1, wherein the rubber roller is a lok 205 and a Chemlok 238. 4. The rubber roller according to claim 1, wherein the metal shaft is made of SUS316 stainless steel. 5. The rubber roller according to claim 1, wherein the metal shaft is made of a titanium material. 6. A developing apparatus comprising the rubber rollers according to claim 1 arranged in a conveying path in each processing tank.