JPH04253652A - Packaging material for photograph processing agent - Google Patents

Abstract

PURPOSE:To provide a subdivision pack container for which the residue of a content after discharge of the content is less, for a granular agent subdivision pack of a processing agent kit. CONSTITUTION:Internal surface treatment is applied on a packaging material for a photograph processing agent in such a manner that the surface central line mean roughness Ra at least on the internal surface is 1.0mum or lower, and the surface resistance rate is 10<11>OMEGA or lower at a room temperature and relative humidity of 20%.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for disposing of packaging materials for photographic processing agents, and more particularly to eliminating pollution hazards from used packaging materials to be disposed of.

0002

[Background of the Invention] Photochemical processing such as developing and fixing of photographic light-sensitive materials has already shifted from in-house processing by individual users to processing on a corporate scale, and processing agents are also weighed out in accordance with the processing agent prescription. It is supplied to companies in the business of image processing as a kit consisting of small, practically conveniently sized sachets.

On the other hand, the kits for photographic processing agents are not very large due to deterioration fatigue due to aeration due to atmospheric oxygen, carbon dioxide gas, etc., processing amount, and mother liquor replacement unit to deal with processing fatigue. The number of packages that make up the Moki Kit is quite large, and it is legally classified as industrial waste.

[0004] The packaging materials used for these sachets are mostly resin containers such as resin bags and resin bottles in order to reduce weight and prevent deterioration and moisture absorption, and these are packed into cardboard outer boxes and made into kits. . After use, these sachets are treated separately from the cardboard exterior that clearly states their contents, and the ability to know the origin of the sachet is lost.

[0005] Not to mention the problems associated with waste such as used syringes, unidentified waste is something people in charge of disposal avoid, and it is necessary to deal with it in an environmentally and public health manner. This could lead to

[0006] Therefore, if it is hoped that used sachet containers can be disposed of without any hindrance, it is desirable to wash and remove the remaining contents prior to disposal. However, the BOD and COD of treatment agents are generally extremely high, and the pH is at both high and low extremes, and cleaning wastewater often exceeds wastewater standards for pollution prevention. At this time, mixing the washing waste water with the exchange mother liquor is avoided because it causes a disadvantage in resource recovery from the exchange mother liquor.

[0007] Therefore, it is required to minimize the amount of drug remaining in the packaging container. Particularly in the case of powders, they are trapped in the roughness of the inner surface of the container and are electrostatically adsorbed, resulting in a high content remaining in the form, which is particularly problematic.

[0008]

OBJECTS OF THE INVENTION It is an object of the present invention to provide a powder packaging container for a processing agent kit in which less content remains after the contents are discharged.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a packaging material for photographic processing agents in which at least the inner surface has a surface centerline average roughness Ra of 1.0 μm or less and a surface resistivity at room temperature and relative humidity of 20%. This is achieved by a photographic powder processing agent packaging material whose inner surface is processed to a resistance of 1011Ω or less.

[0010] The surface center line average roughness Ra of the inner surface of the sachet container of the current treatment agent kit is about 5 μm, at room temperature (~20°C), R
The surface resistivity ω at H20% is about 1012Ω.

On the other hand, the particle size of the powder is determined by crushing during its preparation,
The fine powder particles generated by rubbing with a V-type mixer or the like or by the abrasive action during transportation range from several micrometers to several hundred micrometers. The fine powder particles are captured by the roughness of the inner surface, and when the powder particles are discharged, they become electrically charged due to friction between the particles, the air, and the inner surface of the container.If both factors are combined to a severe degree, the amount of adhesion remaining on the inner surface is 5×. 10-3 g/dm2. this is,
Equivalent to 2.5g in a cubic container (5 sides) with sides of 10cm.

[0012] In the present invention, the amount of residual adhesion is reduced to at least 1/20 or less.

In the present invention, in order to make the average roughness Ra 1.0 μm or less and the surface resistivity 1011 Ω or less by inner surface processing, a solvent that is soluble in the container resin or a conductive resin solvent solution is used. A container is formed with the inside surface laminated with a thin film coated with a material such as an ionic surfactant, or a resin solution with appropriate conductivity reduced in surface roughness by a casting method. do it.

In the present invention, the surface center line average roughness Ra
was measured by the stylus method.

[0015] Also, the surface resistivity ω is 20°C, RH20%
A DC voltage of 500 V was applied between the concentric ring electrodes, and the surface resistance Rs was determined from the voltage and current and converted to unit width.

ω=π(D+d)Rs/(D−d)(Ω) where d is the negative electrode diameter and D is the positive electrode diameter.

[0017]

[Examples] Example 1 Anhydrous sodium carbonate was thoroughly dried and ground in a mortar to obtain a sample with an average particle size of 100 μm.

Next, the inner surface has a center line average roughness Ra of 0.2,
0.5, 1.0, 2.0, 5.0μm, surface resistivity is 1
09, 1011, 1012, 1013Ω 10cm x 1
Put 5 g of the sample into a resin container of 0 cm x 10 cm size, seal it tightly and shake it 10 times, then take out the sample inside and add 50 ml of water to each empty container to remove the remaining Na2CO.
3 was dissolved and quantitatively analyzed to determine the amount of Na2CO3 remaining on the inner surface, which is shown in Table 1. Each numerical value is the average value of three experimental values. The above operation was carried out under the conditions of 23° C. and 20% RH.

[0019]

[Table 1]

As is clear from the table, in the range of Ra of 1.0 μm or less and ω of 10 11 Ω or less, the residual amount is reduced to 1/10 or less of the conventional general case (Ra: 5.0, ω: 10 12).

Example 2 Photographic developer with the following composition and 10 cm x 10 cm x 20 cm
An experiment similar to Example 1 was conducted using a m-sized container,
Visual evaluation of the amount remaining in the container revealed that, similar to the results in Table 1, the amount remaining was significantly smaller only under conditions within the scope of the present invention.

Sodium sulfite
841.2g sodium carbonate

196.5g sodium hydroxide
157.7g Ethylenediaminetetraacetic acid sodium salt 21.
8g hydroquinone
319.7g potassium bromide

95.9g 5-nitroindazole
2.3g5
-Methylbenztriazole
3.4g 1-phenyl-5-mercaptotetrazole 0.4g phenidone

10.7g polyethylene glycol (average molecular weight 1000) 800.0g

Claims (1)

[Claims] Claim 1: In a packaging material for a photographic processing agent, at least the inner surface thereof has a surface center line average roughness Ra of 1.0 μm.
surface resistivity of 1 or less at room temperature and 20% relative humidity
Photographic powder processing agent packaging material whose inner surface has been processed to a resistance of 0.011Ω or less.