JPH095936A - Method for packaging photographic photoreceptor, photoreceptor packing paper and method for wrapping photoreceptor in the paper - Google Patents

Abstract

PURPOSE: To provide a method for packaging a photographic photoreceptor without photographically deteriorating the photoreceptor by the moisture carried in by the filler paper, to furnish a packing paper used in the method and to provide a method for wrapping the photoreceptor in the paper to keep the paper under appropriate humidity conditions. CONSTITUTION: A sheet-shaped photographic photoreceptor 2 is packaged with a filler paper 1. In this case, the water content of the filler paper 1 is controlled to <=10% when the photoreceptor 2 is packaged and sealed. The photographic photoreceptor packing paper to be used as the filler paper 1 is allowed to contain 5-60% NBKP. The packing paper to be used as the filler paper 1 is made, dried and then rolled, and the paper is used in packaging and sealing while the water content is still at <=7%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographic photoreceptor packaging method, a photographic photoreceptor packaging paper material, and a photographic photoreceptor packaging paper material packaging method. The present invention relates to a method for sandwiching a paper with a backing paper, packaging, a paper material used as the backing paper, and a method for packaging the paper material for storing the paper material.

[0002]

2. Description of the Related Art When a sheet-shaped photographic photosensitive member such as an X-ray film or a photosensitive material for printing is packaged as a product, it is used for the purpose of preventing bending or damage of the photographic photosensitive member.
BACKGROUND OF THE INVENTION It is common practice to wrap both sides of a photographic photoconductor with a patch paper. However, the patch paper is liable to contain moisture, and the influence of the moisture brought into the packaging body of the photographic photoreceptor on the photographic photoreceptor cannot be ignored. If the humidity inside the packaging of the photoconductor increases due to the moisture brought in by the backing paper, problems such as deterioration of photographic properties such as a decrease in color density of the photoconductor and fluctuations in the size of the photoconductor may occur. Become. Therefore, if the backing paper is used while the humidity is not adjusted, the photographic properties and the size of the photographic photosensitive member will vary. On the other hand, if the patch paper is completely dried and used immediately to reduce the humidity inside the photoconductor package, the patch paper rapidly absorbs the humidity in the packaging process and eventually retains a large amount of water. For this reason, the humidity inside the photographic photoreceptor package becomes high,
Due to the generation of static electricity, the slipperiness between the backing paper and the photographic photoreceptor deteriorates, and the workability at the time of packaging the photographic photoreceptor or taking it out for use deteriorates the coloration of the photographic photoreceptor due to an electrical obstacle. However, there is a problem that the photosensitivity of the photographic photoconductor is interrupted due to the powder dust of the backing paper. In order to solve such a problem, it becomes important to adjust the water content of the backing paper.

In Japanese Patent Laid-Open No. 3-156446, after the backing paper is humidity-controlled for 30 minutes or more (first humidity control) in an environment below the absolute temperature under the photo-photoconductor packaging work environment, it is subjected to the packaging work environment. It is described that by controlling the humidity for 15 minutes or more (second humidity control), it is possible to prevent the size variation of the photographic photosensitive member due to the influence of humidity.

[0004]

However, the above-mentioned method of the prior art only discloses that the problem of the size variation of the photographic photosensitive member due to humidity is solved, and what is known about the prevention of deterioration of photographic property. Is also not listed. Furthermore, the humidity control of the backing paper in the above-mentioned conventional method is 30
And the second humidity control requires 15 minutes or more, and the actual photographic photosensitive member packaging work is performed only after the two-stage humidity control, so that the time efficiency in the photographic photosensitive member packaging work is satisfactory. It wasn't something.

SUMMARY OF THE INVENTION The present invention aims to provide a method for packaging a photographic photosensitive member which overcomes the drawbacks and shortcomings of the prior art and does not deteriorate the photographic property of the photographic photosensitive member due to the moisture brought into the backing paper. is there. Another object of the present invention is to provide a photographic photosensitive material packaging paper material used in a method for packaging a photographic photosensitive material without deterioration of photographic property. A further object of the present invention is to provide a packaging method for a photographic photoconductor packaging paper material for storing the photographic photoconductor packaging paper material under suitable humidity conditions.

[0006]

As a result of earnest studies on the water content of a patch paper that affects the humidity in the photographic photoreceptor package, the present inventor has determined the water content of the patch paper when packaging the photographic photoreceptor. It has been found that the humidity within the package becomes a preferable condition when the value is within the range, and the present invention has been completed based on this finding. That is, the first aspect of the present invention
Is a method of packaging a photographic photoconductor in which a sheet-shaped photographic photoconductor is wrapped with a wrapping paper, wherein the moisture content of the wrapping paper is 10% or less when the photographic photoconductor is sealed and packaged. Is the packaging method.

The backing paper referred to in the present invention means that when a sheet-shaped photographic photosensitive member is packaged as a product, the photographic photosensitive member or two or more photographic photosensitive members are stacked for the purpose of protection such as bending and damage prevention of the photographic photosensitive member. It is provided so as to sandwich both sides of the photographic photosensitive member. Since thick paper such as cardboard is generally used as this backing paper, it may also be referred to as the ball or cardboard. As shown in FIG. 1, typical forms of the backing paper 1 used for packaging the photographic photoreceptor 2 are S type, W type, T ₁ type and T ₂ type (D).
Is mentioned. As shown in FIG. 1 (A), the S type is applied by sandwiching both sides of the photographic photosensitive member 2 with two sheets of backing paper 1. The W type is as shown in FIG.
One sheet of backing paper 1 is folded back and applied so as to sandwich both sides of the photographic photoreceptor 2, and one side of the photographic photoreceptor 2 is protected by folding back the backing paper 1. T ₁
As shown in FIG. 1C, the mold folds one sheet of backing paper 1 so that both sides of the photoconductor 2 are sandwiched, and a smaller folding back is applied to both sides of one backing surface of the backing sheet 2. 1a is provided to protect both sides of the photographic photoreceptor 2, and the developed shape of this backing paper is T
Since it is a character type, it was named above. Type T ₂ is shown in Figure 1 (D).
As shown in, by further providing a folding back 1b on the folding surface of the backing paper 2 having the T ₁ type small folding back 1a,
This is intended to protect the entire side of the photographic photoreceptor 2.
In the present invention, there is no problem if the water content of the patch paper is 10% or less at the time of hermetically sealing the photographic photoreceptor, but preferably 9
% Or less, more preferably 8% or less, still more preferably 7% or less.
% Or less.

In the first method of packaging a photographic photoreceptor of the present invention, the water content of the patch paper is 1 when the photographic photoreceptor is hermetically packaged.
In order to set the content to 0% or less, it is preferable to devise the composition of the photographic photosensitive material packaging paper material used as the backing paper.
Therefore, a second aspect of the present invention is a photographic photoconductor packaging paper material used as a backing sheet for packaging a sheet-shaped photographic photoconductor.
A photographic photoconductor packaging paper material containing 5 to 60% of KP. NBKP is a bleached kraft pulp mainly made of softwood and has an average fiber length of 2.
It is in the range of 5 to 5.0 mm. Since NBKP has a relatively short fiber length and a small fiber interval after papermaking drying, NBKP has a small water retention capacity and is used to secure a low water content of the paper material. Typical examples of the specific manufacturer names of NBKP include those manufactured by Canfor Corporation, Northwood Pulp, International, and the like.

In the photographic photosensitive material packaging paper material of the present invention,
It is important that the NBKP content is 5 to 60%, preferably 10 to 50%, more preferably 20 to 4%.
The content is 0%, more preferably 25 to 35%. When the NBKP content is less than 5%, it may be difficult to achieve the water content of the patch paper according to the first aspect of the present invention. Further, if the NBKP content exceeds 60%, uneven formation of the paper material and deterioration of the rigidity may be observed. The reason for the decrease in rigidity is considered to be that the shorter the fiber length is, the smaller the binding force between the fibers after the papermaking is dried.

In addition to NBKP, the composition of the photographic photoreceptor packaging paper material of the present invention may also contain LBKP, pulp materials such as self-damaged paper, caustic soda, defoaming agents, internal additives such as sulfuric acid bands and the like. it can. LBKP is a kraft pulp whose main raw material is hardwood, and has an average fiber length of 1.0 to
It is in the range of 2.0 mm. A typical example of a specific manufacturer name of LBKP is manufactured by Alabama River Pulp Company. Since the fiber length of LBKP is longer than that of NBKP, it is possible to suppress the decrease in rigidity due to the inclusion of NBKP. The content of LBKP is preferably 45 to 90%, more preferably 50 to 90%.
The content is 85%, more preferably 55 to 80%, and most preferably 60 to 75%. The self-damaged paper is used by re-pulping a loss portion generated at a paper break or both ends at the time of paper making of the backing paper described in this specification. The content of self-damaged paper is 50% or less, 0-4
0% is preferable, 0-30% is more preferable, and 0-20% is more preferable.

[0011] The aluminum _{sulfate, Al 2 (SO 4) 3} · 1
It is represented by 8H ₂ O and has the property of neutralizing alkali by adding it to pulp and hardening the paper to impart water resistance. In the present invention, a sizing agent used in a general papermaking process. Is used in the present invention as a substitute for. The reason why the sizing agent is used in place of the sizing agent in the present invention is that the sizing agent causes a chemical reaction when it comes into contact with the photographic photosensitive member, and therefore it is judged to be unsuitable for papermaking of the present paper material used as a backing paper when packaging the photographic photosensitive member. is there. Specific examples of the sulfate band include Ekiban (manufactured by Sumitomo Chemical Co., Ltd.) and the like. The amount of the sulfuric acid band used is preferably 0.1 to 1.5%, more preferably 0.2 to 10%, still more preferably 0.4 to 10.
It is to contain 0.8%.

The defoaming agent is generally added in order to prevent nonuniformity of the paper material structure due to foaming in the papermaking process. In the present invention, the aliphatic alcohol derivative (C _n H _2n- An antifoaming agent of ₁ OH modified form is preferably used. The reason for this is that since the objective can be achieved without the use of silicone, which may contain silicon hydride, which causes abnormal performance when the photosensitive material comes into contact, the photographic property of the photographic photoreceptor can be kept good. Conceivable. Specific examples of fatty alcohol derivatives (C _n H _2n-1 OH-modified product) based defoamer, Afuraniru O Extra (B
ASF Corporation) and the like are exemplified. The amount of the defoaming agent used in the present invention is preferably 0.02 to 0.15%, more preferably 0.02 to 0.10%, further preferably 0.02 to 0.08%. It is to be. Caustic soda is generally used for adjusting the pH of pulp, and in the present invention, it is p.
What is added so that H becomes 5 to 9, preferably 5.5 to 8.5, and particularly preferably 6.0 to 8.0 is particularly preferable. Since the paper material of the present invention can easily keep the water content low, it is suitably used as a backing paper in packaging of a photoconductor, but it is not limited to use as a backing paper only, and will be described later. It can also be used as a winding core or the like used in the method of rolling the paper material of the present invention in a roll shape and hermetically packaging.

In the method for packaging a photographic photoreceptor of the present invention,
The moisture content of the patch paper when the photographic photoreceptor is hermetically sealed is 1
In order to set the content to 0% or less, the storage condition of the photographic photoreceptor packaging paper material used as a backing paper is also important. In order to achieve preferable storage conditions for the photographic photoreceptor packaging paper material, it is preferable to devise a packaging method. Therefore, the third aspect of the present invention
Is a photograph characterized in that a photographic photoconductor packaging paper material used as a backing paper for wrapping a sheet-shaped photoconductor is wound into a roll after drying the paper, and the water content is 7% or less and the package is sealed. A method for packaging a photoconductor packaging material. In order to wind the paper material into a roll after drying the paper and hermetically seal the paper material, the water content of the paper material before the hermetic packaging is required to be 7% or less, preferably 6% or less, It is preferably performed within 5% or less.

In the wrapping method for the photographic photoreceptor packaging paper material of the present invention, it is preferable that the paper material is hermetically sealed in an environment of a drying step after the paper material is made. The conditions of the drying step after papermaking are not particularly limited, but the surface temperature of the dryer is 80 to 150 ° C., and the temperature is 80 to 70% in an atmosphere of 10 to 70% RH.
It is preferably performed for 200 seconds. Since the paper material drying step and the hermetic packaging step are performed in the same environment, it is preferable that the winding step between both steps is also performed in the same environment. That is, it is preferable that the drying step, the winding step, and the hermetic packaging step be performed consistently under the same environment.

In the present invention, the packaging material for hermetically packaging the photographic photoconductor packaging paper material is not particularly limited as long as it can block moisture. What can block moisture is concretely, moisture permeability 20g / m ² × 2
4hr. The following films are mentioned, and the water vapor transmission rate is 20g /
m ² × 24 hr. Specific examples of the following film have a thickness of 2
Coextrusion of a single-layer medium / low density polyethylene film having a thickness of 5 μm or more, a vinylidene chloride film having a thickness of 10 μm or more, a polyethylene film having a density of 0.930 g / cm ³ or more having a thickness of 20 μm or more, a polypropylene film and two or more layers. Examples thereof include a multilayer coextruded film having a thickness of 20 μm or more, a biaxially stretched film, and a laminated film having a thickness of 20 μm or more obtained by laminating aluminum foil. The packaging form is not particularly limited as long as it can be hermetically sealed, but a form as shown in FIG. 2 is usually adopted. In addition, various bag forms such as a gusset bag and a packaging bag in which the bottom portion is heat-sealed after the inflation film is cut into an appropriate size are also preferable. A packaging method according to the form of FIG. 2 will be described.
The dried paper material 4 is used as a paper material roll 3 wound in a roll shape with a hollow paper pipe as a winding core 5 (A). A film 6 for packaging a paper material roll is wound around the side surface of the paper material roll 3 (B). The part of the film 6 for paper material roll packaging that protrudes from both ends of the paper material roll 3 is folded into a spiral fold (C). After the folding, the end portion of the paper material roll packaging film 6 is pushed together with the wooden plug 7 into the hollow opening at the tip of the winding core 5 for packaging (D). By the method for packaging a photographic photosensitive material packaging sheet material of the present invention described above, it is possible to reliably guarantee the fluctuation of the quality of the paper material, especially the suppression of the increase of the water content, for 3 months.

In the first method for packaging a photographic photosensitive member of the present invention, in order to keep the water content of the patch paper at 10% or less when the photographic photosensitive member is sealed and packaged, the second aspect of the present invention is used.
The steps from unpacking of the photographic photoconductor packaging paper material package obtained by the photographic photoconductor packaging paper material packaging method to hermetically sealing the photographic photoconductor are also important. Therefore, a fourth aspect of the present invention is a packaging method for a photographic photoconductor for packaging a sheet-shaped photographic photoconductor using patch paper, in which the photographic photoconductor packaging paper material used as the patch paper is wound into a roll after papermaking drying, and the water content is increased. A photographic light-sensitive material characterized by completing the hermetically-sealed packaging of the photographic photosensitive member within 40 minutes from the time of unwinding from the paper-material roll after unsealing the paper-based packaging body hermetically packed to 7% or less. It is a body packaging method. In the method of the present invention, it is important that the time from unwinding from the paper material roll after unpacking the paper material package to completion of hermetically sealing the photographic photoreceptor is within 40 minutes. It is preferably within 30 minutes, more preferably within 25 minutes, still more preferably within 20 minutes. The photographic photoconductor packaging paper material package used at this time is guaranteed to suppress the increase in water content for a considerably long time as described above, but in order to ensure the quality of the photographic photoconductor to be packaged, Is preferably within 3 months after the sealed packaging of the paper material.

The method for packaging the photographic photosensitive member will be described below with reference to FIGS. 2 and 3. In the method for packaging a photographic photoreceptor of the present invention, the following series of operations is most preferably performed in order to keep the water content of the backing paper at 10% or less at the time of hermetically packaging the photographic photoreceptor. A paper material 4 containing 5 to 60% of NBKP is dried and made into a paper material roll 3 to form a paper material roll 3. When the water content of the paper material 4 is 7% or less,
The film 6 having a moisture permeability of 20 g / m ² × 24 hr. Or less is hermetically packaged in the form shown in FIG. The photographic photoreceptor is packaged as a product using the paper material roll package 8 within 3 months after packaging by the above method.

Similar to the paper material roll 3, the photographic photosensitive material roll 2a processed and stored in a roll shape is cut into a predetermined length X, and about 5 to 100 sheets are stacked. At the same time, after unpacking the paper material roll wrapping body 8 in the chamber 10 for applying the backing paper, while cutting it to the same length X as the raw material 2a of the photoconductor,
The paper is unwound from the patch paper feeding unit 10. The stacked photographic photoconductors (hereinafter, also referred to as photographic photoconductor integrated body 2b)
Both sides of the sheet are put so as to be sandwiched by the patch paper 1 cut to the length X, and the patch paper / photoconductor assembly 9 is obtained. The aggregate 9 is further cut and divided into desired product sizes, and hermetically packaged with a product packaging film 11. After that, it will be packed as needed. As the environment in the process of unwrapping the paper material roll and hermetically wrapping with the film for packaging the product, 18 to 28 ° C. and 40 to 60% R in the room of the patch paper delivery unit 10
H, 18-28 ℃, 55-70% in product packaging processing room
RH is particularly preferred.

Further, when the patch paper 1 having the length X is applied to both surfaces of the photographic photosensitive member stack 2b, the slipping property between the patch paper 1 and the surface of the photographic photosensitive member stack 2b is improved for the purpose of improving workability. Therefore, the uneven shape 3 as shown in FIG. 4 is formed on the backing paper 1 in parallel with the feeding direction 20 to the photographic photosensitive member assembly 2b.
It is preferable to have 0. Product packaging film 11
As a minimum, it is necessary to be one that blocks moisture and visible light, and as long as these are satisfied, it is not particularly limited, but an aluminum laminated film or the like is preferable, and specifically, kraft paper. Alternatively, a laminated film of PET, aluminum foil, and a polyethylene film, a laminated film of a polypropylene film containing carbon black and a polyethylene film, and the like can be given. When the photographic photoreceptor packaged as a product is an X-ray film, it is preferable to block not only moisture and visible light but also electromagnetic waves having high penetrating power such as X-rays. For this purpose, it is preferable to use a lead laminate film or the like.

The photographic photosensitive member used in the packaging method of the present invention is not particularly limited as long as it is a sheet type, and a sheet film, a sheet photographic paper, a sheet diazo photosensitive paper, a sheet multicolor thermal recording. It can be applied to a wide range of materials such as paper. In particular, a photographic photoreceptor having a remarkable effect of preventing deterioration of photographic property by adopting the photographic photoreceptor packaging method of the present invention is a photographic photoreceptor having at least one layer containing a trimethyloxacyanine dye. . This photographic photoreceptor is a trimethyloxacyanine dye

[0021]

Embedded image

Is adsorbed on silver halide to supplement the sensitivity to green light, thereby enhancing the sensitivity of the photoreceptor itself. In this photographic photosensitive member, except when a large amount of AgI is present on the silver halide grain surface, the trimethyloxacyanine dye is weakly adsorbed to the silver halide grain, and the dye is easily released by moisture. However, the sensitivity of the photoconductor itself is likely to decrease. However, even in the case of a photographic photosensitive member that is extremely unstable with respect to humidity as described above, the humidity of the photographic photosensitive member package is suppressed by the method of the present invention, so that the photographic property is not deteriorated. .

[0023]

[Effect] According to the first constitution of the present invention, the water content of the backing paper is 10% or less, preferably 9% at the time of hermetically packaging the photographic photoreceptor.
Or less, more preferably 8% or less, still more preferably 7%
By the following, the humidity inside the photographic photoreceptor package is maintained under favorable conditions, so that the size variation of the photographic photoreceptor and the deterioration of the photographic property do not occur. Therefore, it can be suitably used for storing a photoconductor such as a photographic photoconductor having at least one layer containing a trimethyloxacyanine dye, which is easily affected by humidity. The second aspect of the present invention
The composition of NBKP is 5 to 60%, preferably 10
The content of -50%, more preferably 20-40%, and further preferably 25-35% can provide a paper material having a low water content. By using this paper material as a backing paper, it is the first configuration of the present invention.
It becomes easy to set the water content of the backing paper to 10% or less at the time of hermetically sealing the photographic photoreceptor.

Further, according to the third constitution of the present invention, the paper material after papermaking is dried is hermetically packaged at a water content of 7% or less, preferably 6% or less, more preferably 5% or less. It is possible to guarantee the quality maintenance of the photoconductor packaging material for 3 months. Further, in the method of the present invention, the above effect can be further ensured by using a film having a moisture permeability of 20 g / m ² × 24 hr. Further, by using the paper material packaged by the method of the present invention, it is easy to make the water content of the backing paper 10% or less at the time of hermetically packaging the photographic photoreceptor, which is the first constitution of the present invention. become. In addition, within 40 minutes, preferably within 30 minutes, more preferably within 25 minutes, even more preferably within 20 minutes after unsealing of the hermetically sealed paper material package according to the fourth configuration of the present invention.
By completing the sealed packaging of the photoconductor within minutes,
Similarly to the above, it becomes easy to set the water content of the patch paper to 10% or less at the time of hermetically packaging the photographic photoreceptor, which is the first constitution of the present invention.

[0025]

Next, the present invention will be described in detail with reference to examples and comparative examples of the present invention. Example 1: [Papermaking] The following material composition; (Pulp composition): NBKP 30% LBKP 70% Self-damaged paper 2% Sulfuric acid band 0.57% (Internal additive): Afranyl O Extra (BASF) 0 0.05% (antifoaming agent) pH 7.5 (using caustic soda as a pH adjuster) under the following conditions (after drying); grammage 200 g / m ² width 2480 mm thickness 0.25 mm photoconductor packaging Paper material was made.

After paper making, the dryer surface temperature is 100 ° C.,
Dry under 20% RH for 100 seconds (until average water content is below 4.5%). After the desired water content, in the same atmosphere as in the above drying step, as shown in FIG. 5, the paper material 1C-6,1 is cut into half lengths and cut every 2020 m.
C-5, 1C-4, 1C-3, 1C-8 and 1C-7
Each of them was wound on a core to make a paper material roll. These paper rolls were dried under the same atmosphere as the drying conditions under the conditions of a moisture permeability of 12 g / m ² × 24 hr.
The film of m was wound in three turns and hermetically wrapped in the form shown in FIG. The paper material roll package obtained as described above is stored in an unair-conditioned warehouse environment for 1 month for the paper materials 1C-5 and 1C-8, and 2 days for the paper materials 1C-6 and 1C-7. Monthly 3 for paper materials 1C-3 and 1C-4
Stored for a month. The water content of each paper material immediately after papermaking was dried and the water content after storage were measured, and the changes were investigated. The water content of the paper roll is measured at five points at equal intervals in the width direction of the paper roll, including both ends thereof, and the first, fifth, and tenth laps from the outer circumference side of the paper roll. , 100m, 100
The water content at 5 points was measured at 0 m, 100 m from the core side, the 10th lap, the 5th lap, and the first lap. [JIS P-8127] was used as the method for measuring the water content. The test results are shown in Table 1 for 1C-5, Table 2 for 1C-8, Table 3 for 1C-6, Table 4 for 1C-7, and 1C-3.
Is shown in Table 5, and 1C-4 is shown in Table 6.

[0027]

[Table 1]

[0028]

[Table 2]

[0029]

[Table 3]

[0030]

[Table 4]

[0031]

[Table 5]

[0032]

[Table 6]

A moisture permeability of 12 g / m ² × 2 was applied to the above roll of paper material.
The LDPE monolayer film having a thickness of 40 μm and having a thickness of 4 hr or less and wrapped in three turns did not show a large change in water content even after storage for 3 months.

Example 2 A photographic photosensitive member was packaged according to the steps shown in FIG.
The photographic photoreceptor to be packed is a trimethyloxacyanine dye represented by the following chemical formula.

[0035]

Embedded image

S-having a silver halide emulsion layer containing
GA100 (Fuji Photo Film Co., Ltd.) was used.
Cut from the above-mentioned raw material 2a of the photoconductor at intervals of about 0.6 m, and
One photographic photosensitive member aggregate 2b was formed for every 00 sheets. The thickness of the LDPE single layer having the above-mentioned moisture permeability of 12 g / m ² × 24 hr.
A paper material roll obtained by wrapping a film of 0 μm in three windings was opened in the reliance paper feeding section 10 and then unwound while cutting every 0.6 m. The unwound backing paper 1 was applied to both sides of the above-mentioned stack to form a backing paper / photoreceptor stack 9. This aggregate 9 is further processed into a product size (252 mm × 303 mm)
Cut into pieces. A biaxially oriented polypropylene (OPP) film containing carbon black as a product packaging film 11 and LD
Sealing packaging was performed using a laminated film of PE film. It should be noted that the temperature of the paper feeding section 10 room is 23 ± 3 ° C., 5
Under the environment of 3 ± 5% RH, the product packaging factory room is 23 ± 3
The environment was set to 63 ° C. ± 63% RH. After the unwrapping of the above-mentioned paper material roll package, it took 18 minutes from the time of unwinding from the patch paper feeding section 10 to the completion of sealing. In addition, as a result of arbitrarily extracting the backing paper 1 immediately before the sealed packaging and measuring the water content by the method of JIS P-8127, the water content was 5.6%.

The packaged product obtained as described above is treated at 50 ° C.
After being stored in an environment of 75% RH for 3 days, as shown in FIG. 6 (A), the photoconductors 2c on both outer sides of the photographic photoconductor assembly 2b are provided.
Then, the photoconductor 2d located in the middle layer portion was taken out, and exposed with a tungsten lamp as a light source at an exposure illuminance of 10 Lx for 5 seconds. After exposing the photographic photosensitive member to a developing solution SGX-D1
(Fuji Photo Film Co., Ltd.) develop at 34 ° C for 30 seconds,
30 with fixer GR-F1 (manufactured by Fuji Photo Film Co., Ltd.)
It was fixed at 30 ° C. for 30 seconds and thoroughly washed with water. The developed photoreceptor,
As shown in FIG. 6B, each of the middle portion 12 and the end portion 1
The maximum density value (Dm) in 3 is the transmission densitometer TD-90.
4 (Macbeth). The maximum density value (D
m) is calculated by the following formula. Dm = | log (amount of transmitted light / amount of received light) | In addition, for a photographic photosensitive member that was not affected by temperature and humidity immediately after manufacturing, the same exposure and development were performed as a control test, and the maximum density value was measured. did. The difference between the maximum density value of the photographic photoreceptor packaged in this example and the maximum density value of the photographic photoreceptor of the control test was calculated as the NA value. The closer the absolute value of the NA value to 0 is, the less the fluctuation of the maximum density value due to humidity is, which is preferable. The same test as above was carried out for the photographic photosensitive member packaged with the water content of the backing paper at the time of hermetic packaging being 9.2%. The results are shown in Table 7.

[0038]

[Table 7]

From Table 7, the lower the water content of the backing paper,
Since the absolute value of NA is small, it can be seen that the photographic photoreceptor is excellent in storage.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a typical form of a backing paper.

FIG. 2 is a view showing a specific example of a packaging form in the packaging method for a photographic photosensitive material packaging sheet material of the present invention.

FIG. 3 is a diagram showing a specific example of a packaging method for a photographic photosensitive member of the present invention.

FIG. 4 is a diagram illustrating a preferable shape of a backing paper used in the present invention.

FIG. 5 is a diagram showing a paper material sample after paper making in an example of the present invention.

FIG. 6 is a diagram showing a photographic property evaluation part in an example of the present invention.

[Explanation of reference numerals] 1 photographic paper 2 photographic photosensitive member 2a photographic photosensitive material roll 2b photographic photosensitive member assembly 3 paper material roll 4 paper material 5 core 6 paper material roll wrapping film 7 wooden plug 8 paper material roll wrapping body 9 Backing paper / photoconductor assembly 10 Backing paper feeding part 11 Film for film packaging 12 Middle part of photoreceptor 13 End part of photoreceptor 30 Concavo-convex shape

Claims (6)

[Claims] 1. A packaging method for a photographic photosensitive member, in which a sheet-shaped photographic photosensitive member is wrapped with a wrapping paper, wherein the water content of the wrapping paper is 10% or less when the photographic photosensitive member is hermetically packaged. Packaging method for photographic photoreceptor. 2. The method of packaging a photographic photoreceptor according to claim 1, wherein the photographic photoreceptor has at least one layer containing a trimethyloxacyanine dye. 3. A photographic photosensitive material packaging paper material used as a backing sheet for packaging a sheet-shaped photographic photosensitive material, wherein NBKP is 5
A photographic photoconductor packaging paper material, characterized in that the content is -60%. 4. A photographic-photosensitive packaging paper material used as a backing sheet for packaging a sheet-shaped photographic photosensitive material, which is wound into a roll after drying the paper, and hermetically packaged when its water content is 7% or less. A method for wrapping photographic photoconductor packaging paper materials. 5. The method for packaging a photographic photosensitive material packaging paper material according to claim 4, wherein the film has a moisture permeability of 20 g / m ² × 24 hr. 6. A method of packaging a photographic photoconductor for wrapping a sheet-shaped photographic photoconductor using a wrapping paper, wherein the photographic photoconductor packaging paper material used as the wrapping paper is wound into a roll after papermaking drying, and the water content is 7% or less. After unpacking the paper material roll package that has been hermetically packaged in the
A method for packaging a photographic photoreceptor, wherein the hermetically-sealed packaging of the photographic photoreceptor is completed within 0 minutes.