JPH052218B2 - - Google Patents

Description

[Detailed description of the invention]

[Industrial Field of Application] The present invention relates to a package for photographic light-sensitive materials such as films, and more specifically, a photographic light-sensitive material that does not adversely affect photographic performance such as fog on the photographic light-sensitive materials such as films stored in the package. Regarding packaging. [Background of the Invention] In photographic material packages such as photographic film magazines and package cases used for storing and transporting photographic materials such as films and photographic paper, there is a need for text and aesthetics such as specifications of the photographic materials to be stored. The design of
Furthermore, various coatings and printings are applied to protect against water, rust, etc. Conventionally, paints and printing inks used for painting and printing undergo chemical reactions such as polymerization, condensation, and hardening through natural drying, heat baking, heat drying, etc. It was fixed on the base material. Some of these paints or inks may have an adverse effect such as fogging on photographic materials such as film stored in the package if drying and curing are insufficient. However, depending on the type of paint or printing ink, there are some that have the same negative effect on the photographic material stored in the packaging during storage and transportation of the photographic material. Paints and printing ink materials that have excellent properties such as strength and appearance cannot be used if they affect photographic performance.
In order to confirm that they are inert in terms of photographic performance, it was necessary to individually investigate the resins, additives, pigments, solvents, etc. used. Therefore, in conventional paints and inks for photographic material packaging, combinations of paints and inks made of substances that are inert in terms of photographic performance are selected, and the degree of drying and curing of the paints, etc. is also controlled. However, there was an inconvenience in that process control became complicated. [Object of the Invention] Accordingly, an object of the present invention is to provide a photographic material package with good productivity, which does not cause adverse effects such as fog on the photographic material housed in the package. [Structure of the Invention] The above-mentioned object of the present invention is achieved by a photographic light-sensitive material package whose surface is provided with a layer that is inactive in terms of photographic performance. [Specific Structure of the Invention] The present invention is characterized in that a layer that is inactive in terms of photographic performance is provided on the surface of a package of a photographic light-sensitive material such as a film. That is, even if the photographically inactive layer is all of the coating layers on the package base material, it may be the uppermost layer on which various layers are provided as other undercoat layers on the package base material. However, it is sufficient that a layer that is inactive in terms of photographic performance is finally provided on the surface of the package. The photographically inert layer provided on the surface of the photographic light-sensitive material package of the present invention (hereinafter referred to as the surface layer of the present invention) is formed of the following resin. The resin used for the surface layer of the present invention includes vinyl resins whose main component is vinyl chloride resin (including organosol) (e.g., copolymer resins whose main component is vinyl chloride, and organosols whose main component is vinyl chloride). Copolymer resins dispersed in a plasticizer and a small amount of solvent, etc.), vinyl amino resins (e.g., vinyl resins such as vinyl chloride, styrene, etc.),
resins with amino groups such as urea resins and benzoguanamine resins), alkyd/vinyl resins (e.g., polybasic acids such as phthalic anhydride and maleic anhydride, and polyhydric alcohols such as glycerin and pentaerythritol) resins modified with vinyl monomers such as vinyl chloride and styrene), oil-free alkyd resins (e.g., alkyd resins that are not modified with fatty oils or fatty acids such as linseed oil, soybean oil, and castor oil) resin, etc.), thermosetting acrylic/amino resin (e.g.
Resins consisting of acrylic resins such as acrylic acid, methacrylic acid, acrylic esters, acrylamide, acrylonitrile, and resins with amino groups such as urea resins and benzoguanamine resins), high-molecular and low-molecular polyester/amino resins (e.g. adipine) (resins made of polyester resins obtained by polycondensation of acids such as acids and isophthalic acids with polyhydric alcohols such as ethylene glycol and trimethylolpropane, and resins having amino groups such as urea resins and benzoguanamine resins), Further examples include epoxy and amino resins. The resin used in the surface layer of the present invention is preferably used as a transparent resin without adding pigments, but pigments that are inert in terms of photographic performance, such as quinacrylon red, watching red, etc.
Insoluble azo type, chrome vermilion, isoindolinone, Gunjiyo, copper phthalocyanine green, etc. can be used. The resin used for the surface layer of the present invention is mixed and dissolved in a solvent, etc., and prepared as a coating agent (hereinafter referred to as the coating agent of the present invention) in which the resin is dispersed and mixed with pigments and additives. It can be coated onto a body substrate. Examples of the solvent used here include aromatic hydrocarbons such as toluene and xylene, esters such as ethyl acetate, ketones such as acetone and methyl ethyl ketone, and alcohols such as methanol and ethanol. Other additives that do not adversely affect photographic performance include surfactants, anti-skinning agents, thickeners, and spreading agents that impart fluidity. After being applied, the coating agent layer of the present invention is dried and cured to form the surface layer of the present invention. This drying,
Curing conditions vary depending on the type of substrate, type of coating agent used, amount of dryer, etc., but drying,
The curing temperature is preferably about room temperature to 350°C, and the drying and curing time is preferably about 1 second to 40 minutes. The thickness of the surface layer of the present invention formed as described above is preferably 0.01 μm to 100 μm, and more specifically, when applied as a paint using a common coating device, the thickness is 0.01 μm to 100 μm. is preferable,
More preferably, it is 1 μm to 20 μm, and when printing as a printing ink with an offset printer or the like, it is preferably 0.01 μm to 10 μm, and more preferably 0.5 to 4 μm. Any base material can be used for the photographic material package of the present invention, such as various papers, woods, plastics made of natural or synthetic polymers, iron, zinc, aluminum, copper, etc. Examples include metals such as alloys thereof. Furthermore, the surfaces of these base materials may be subjected to various surface treatments. In the photographic light-sensitive material package of the present invention, as long as it has the above-described surface layer of the present invention, an undercoat layer such as various conventionally used colored paints may be provided. That is, any undercoat layer can be used as the undercoat layer, even if it would have an adverse effect on the photographic performance if it did not appear on the surface layer, as long as the surface layer of the present invention is provided thereon. Specifically, any combination of various resins, solvents, oils and fats, and inorganic and organic pigments can be selected for use in this undercoat layer. [Specific Effects of the Invention] According to the package having the surface layer of the present invention, the photographic material stored inside does not fog even when stored for a long period of time, and can be easily used in the production process of the package. This eliminates the need to individually inspect the materials of the coating layer for activity or inactivity in terms of photographic performance, which simplifies process control and provides packaging for photographic light-sensitive materials with good productivity. [Specific Examples of the Invention] Hereinafter, the present invention will be specifically explained using Examples, but the embodiments of the present invention are not limited thereto. Example 1 Using 0.25 mm thick tin (Sn) free steel as the substrate, Titanium White 30 was used as the undercoat layer.
A paint consisting of a polyester amino resin containing 100% by weight was applied and dried at 180°C for 10 minutes.
Further, offset printing was performed using a printing ink made of a rosin-modified alkyd resin containing 40 parts by weight of carbon black, followed by drying at 160° C. for 10 minutes. Next, the surface layer is made of polyester, a transparent coating agent that does not contain pigments.
After coating with a paint made of amino resin,
Drying was performed at 190°C for 10 minutes to form a film layer with a thickness of 15 μm. The metal printing plate prepared as described above was stored together with an ASA400 photographic color film at 55° C. for 5 days, and then subjected to post-development. The difference in density between the metal printing plate and a blank stored without coexistence was measured, and the fog density was measured. Example 2 A surface layer made of oil-free alkyd resin was provided in place of the polyester amino resin of the surface layer in Example 1 by offset printing, and then heated at 180°C.
Drying was performed for 10 minutes to form a film layer with a thickness of 2 μm. The metal printing plate prepared as described above was stored under the same conditions as in Example 1, and the fog density was measured. Comparative Example 1 A metal printing plate was prepared and stored under the same conditions as in Example 1, except that the surface layer was not coated with a paint, and the fog density was measured. Comparative Examples 3 to 9 Comparative samples were prepared in the same manner as in Example 1 except that the polyester amino resin in the surface layer was replaced with the resin shown in Table 1 (continued), and the fog density was measured in the same manner. Example 3 Regular paper with a thickness of 200 μm was used as the base paper, and offset printing was performed using a rosin-modified phenolic resin printing ink containing 40 parts by weight of carbon black at 30°C for 10 minutes.
Drying was performed for seconds. Furthermore, a pigment-free acrylic/vinyl resin paint was applied as a surface layer and dried at room temperature. The thickness of the surface layer was approximately 1 μm. The paper pieces prepared as described above were stored together with ASA400 photographic color film at 55°C for 5 days, and then developed. The fog density was measured by measuring the difference in density from a blank stored under the same conditions without coexisting with the paper piece. Comparative Examples 10 to 11 Comparative samples were prepared in the same manner as in Example 3 except that the acrylic/vinyl resin in the surface layer was replaced with the resin shown in Table 1 (continued), and the fog density was measured in the same manner. Comparative Example 2 A piece of paper was prepared under the same conditions as in Example 3, except that the surface layer in Example 3 was not applied, and the fog density was measured. The results of Examples 1 to 3 and Comparative Examples 1 to 11 are shown in Table 1 and Table 1 (continued) below.

【table】

[Table] From the above results, in the samples in which the surface layer of the present invention was provided on the surface of metal and paper base materials, even if the undercoat layer was provided with a coating film that caused fog (Comparisons 1 and 2), there was no problem. It has no effect on photographic materials and does not increase the degree of fogging even during storage at 55°C for 5 days.

Claims (1)

[Claims] 1. Copolymer resins mainly composed of vinyl chloride, vinyl/amino resins, alkyd/vinyl resins, oil-free alkyd resins, thermosetting acrylic/amino resins, or high- and low-molecular polyesters.
1. A photographic material package, characterized in that a layer inert in terms of photographic performance is provided by coating the surface with a coating liquid made of an amino resin.