JPH07241867A - Production of molded article of resin for photographic photosensitive material, molded article of colored resin and packaging body of photographic photosensitive material - Google Patents

Abstract

PURPOSE:To solve the aforesaid problems, to prevent a shielding fault sufficiently and to obtain a molded article of resin for a photographic photosensitive material and a molded article of colored resin which are free from nonuniformity in density and of low cost, without adding such an additive or the like as to cause fogging in the photographic photosensitive material. CONSTITUTION:In regard to production of a molded article of resin for a photographic photosensitive material wherein mixed pellets are prepared by mixing diluted resin pellets and master batch pellets and the mixed pellets are charged in an injection molding machine and subjected to injection molding, production of the molded article of resin for the photographic photosensitive material which is featured by that the apparent viscosity muMB of the master batch pellets and the apparent viscosity muN of the diluted resin pellets meet muMB/muN<1.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method for producing a resin molded product for a photographic light-sensitive material, a method for producing a colored resin molded product, and
The present invention relates to a method for producing a photographic light-sensitive material package. The invention is particularly applicable to 135 film cartridges, 110 cartridges, 120
It can be applied to film cartridges, film with lenses, etc.

[0002]

2. Description of the Related Art Conventionally, a resin molded article of a photographic light-sensitive material has been colored by adding a coloring pigment, particularly carbon black, in order to prevent fog of the photographic light-sensitive material to be packaged.
Then, as a method for producing a resin molded product for a photographic light-sensitive material, a master batch pellet of polystyrene resin containing carbon black and a polystyrene resin pellet are molded in JP-A-63-318553 and JP-A-1-182327. It is described that the structure of the molding machine can be simplified by mixing in the upstream of the machine to form mixed pellets and molding a resin molded product.

[0003]

A resin molded article of a photographic light-sensitive material contains a sufficient amount of a coloring pigment such as carbon black as a whole, and the coloring pigment such as carbon black does not form coarse particles. It has been found that not only is it sufficiently dispersed, but also the amount of the coloring pigment such as carbon black should be uniform depending on the location.

However, in the above-mentioned conventional techniques, a sufficient amount can be added as a whole, and the light-shielding defect due to the generation of coarse particles of carbon black can be prevented, but the light-shielding defect can be prevented in a molded product having a small thickness. Turned out to be inadequate.

That is, it was found that even if the carbon black is uniformly dispersed in the masterbatch pellets, if the masterbatch pellets and the diluted resin pellets are not melted uniformly with each other, the density becomes uneven.

An object of the present invention is to solve the above-mentioned problems, to sufficiently prevent light-shielding defects, to prevent uneven density, and to add no additives such as fog to a photographic light-sensitive material.
It is an object to provide a low-cost resin molded product for a photographic light-sensitive material and a colored resin molded product.

[0007]

According to the present invention, the density unevenness is a molten resin (natural resin and masterbatch base resin).
Achieved by discovering that there is a combination that reduces the variation in concentration most by using resins showing various apparent viscosities as the masterbatch base resin and diluent resin Is.

The above will be described with reference to FIGS. 1 to 3 which are schematic views showing a minute portion of a finished molded product. Figure 1
It is a figure which shows what generated the coarse particle of carbon black. In this way, when coarse particles of carbon black are generated, the density of the surroundings is reduced by the amount of coarse particles of carbon black. On the other hand, the conventional technique shown in FIG.
No coarse particles of carbon black are generated. But,
It can be seen that density unevenness has occurred. On the contrary,
The present invention, as shown in FIG. 3, produces a molded product having almost no density unevenness that can be used for packaging a photographic light-sensitive material even if it is thin.

The object of the invention is solved by the claims which follow.

The present invention relates to a method for producing a resin molded product for a photographic light-sensitive material, which comprises mixing a diluted resin pellet and a masterbatch pellet into a mixed pellet, and introducing the mixed pellet into an injection molding machine to perform injection molding. It is characterized in that the apparent viscosity μ _MB of the master batch pellets and the apparent viscosity μ _N of the diluted resin pellets at a shear rate of 100 S ⁻¹ at the plasticizing temperature of the molding machine satisfy μ _MB / μ _N <1. is there.

A photographic light-sensitive material obtained by mixing diluted resin pellets substantially made of polystyrene resin and master batch pellets containing carbon black into mixed pellets, and introducing the mixed pellets into an injection molding machine for injection molding. 230 ° C in the production method of resin molded products for automobiles
The apparent viscosity μ _MB of the master batch pellets and the apparent viscosity μ _N of the diluted resin pellets at a shear rate of 100 S ⁻¹ satisfy μ _MB / μ _N <1.

Further, a photographic light-sensitive material obtained by mixing diluted resin pellets substantially made of polyethylene resin and master batch pellets containing carbon black into mixed pellets, and introducing the mixed pellets into an injection molding machine for injection molding. 160 ° C in the production method of resin molded products for automobiles
The apparent viscosity μ _MB of the master batch pellets and the apparent viscosity μ _N of the diluted resin pellets at a shearing temperature of 100 S ⁻¹ satisfy μ _MB / μ _N <1.

When the diluted resin pellets and the masterbatch pellets are made of the same type of resin as the base material, the melting temperatures are close to each other, so that control at the time of melting is easy, and since they are easily melted, uneven density occurs. It is difficult to do and is preferable.
In particular, it is preferable that both the diluted resin pellets and the masterbatch pellets are polystyrene resins, and that the diluted resin pellets and the masterbatch pellets are both polyethylene resins. Here, the same type of resin means not only those of the same polystyrene resin but also, for example, LD
Resins that completely dissolve into each other, such as PE and HDPE.

From the viewpoint of cost, the diluted resin pellets are
It is preferable that a coloring resin such as carbon black is not substantially contained.

The average particle diameter (arithmetic mean diameter of minor axis) of the diluted resin pellets is 0.5 mm from the viewpoint of easy production of pellets.
It is preferably more than the above, and it is easy to uniformly mix the pellets, the control at the time of melting is easy, and since uneven density is less likely to occur, the smaller the better, 3.5 mm
It is preferably below (particularly 3.0 mm or less (further 2.0 mm or less)).

It is preferable that the diluted resin pellets and the masterbatch pellets are uniformly mixed. Diluted resin pellets and master batch pellets are uniformly mixed means that about 10 g of mixed pellets are randomly taken out and the standard deviation / average of the number of master batch pellets (hereinafter, pellet mixing A state index) is 0.3 or less. In addition, since the conventional one did not care whether the pellets were uniformly mixed in such a fine portion, the pellet mixing state index was 0.4 or more. Further, the average particle size of the masterbatch pellets (arithmetic average diameter of minor axis) is preferably 0.5 mm or more from the viewpoint of easiness of production of the pellets, and it is easy to uniformly mix the pellets and control when melting is performed. Since it is easy and density unevenness is less likely to occur, the smaller size is preferable, and it is preferably 3.5 mm or less (particularly 3.0 mm or less (further 2.0 mm or less)).

The shapes of the diluted resin pellets and the master batch pellets are preferably spherical, columnar and prismatic, but not limited thereto.

The masterbatch pellets preferably contain 15% by weight or more and 50% by weight or less of carbon black. In this case, preferably, the average primary particle diameter of carbon black is 1.0 × 10 ⁻⁸ m or more, and 1.0 × 10 ^−8
-6 m or less. The pH of carbon black is JI.
In the measuring method of S standard 6221, 5 or more (especially 6 or more) is preferable, and 9 or less (especially 8 or less) is preferable. Also,
Examples of preferred carbon blacks include oil furnace carbon black, Ketjen carbon black, gas furnace carbon black, channel carbon black, thermal carbon black, acetylene carbon black, and the like.

It was also found that the above applies not only when carbon black is used as the color pigment, but also when other color pigments are added.

Examples of the color pigment include carbon black as well as organic pigments such as Pig. Black 1 and inorganic pigments.

The masterbatch pellets contain 15 color pigments.
It is preferably contained in an amount of 50% by weight or more and 50% by weight or less. In this case, preferably, the average particle diameter of the primary particles of the coloring pigment is 1.0 × 1.
It is 0 ^-8 m or more and 1.0 × 10 ^-6 m or less. The average particle size of the primary particles of the coloring pigment and carbon black is the most frequent value of the particle size measured by electron micrograph.

Apparent viscosity of masterbatch pellets μ _MB
And the apparent viscosity μ _N of the diluted resin pellets preferably satisfies μ _MB / μ _N <1.

Since the molten resin is a non-Newtonian fluid, the apparent viscosity changes depending on the shear rate. Therefore, according to the operating conditions in the plasticizer of the injection molding machine,
The shear stress at several shear rates at the temperature of the resin solution in the plasticizer of the injection molding machine (plasticization temperature) is measured, the apparent viscosity is determined, and the values are interpolated to determine the operating conditions of the injection molding machine. Together, the apparent viscosity at a shear rate of 100 S ^-1, which is the most typical shear rate in the plasticizer of the injection molding machine, was calculated. Generally, the shear rate in the plasticizer of the injection molding machine is around 100 S ⁻¹ , and the plasticizing temperature is around 230 ° C. for polystyrene and around 160 ° C. for polyethylene. Therefore, from the most usual operating conditions of an injection molding machine, a value measured at a shear rate of 100 s ⁻¹ and a temperature of 230 ° C. for polystyrene and 160 ° C. for polyethylene may be used. To determine the relationship between shear rate and shear stress, Shigeharu Onoki, “Rheology for Chemists, pp.23-24, Chemistry Doujin Chemistry Monograph 32 (1982)
The Shimadzu flow tester CFT-500 type (manufactured by SHIMADZU), which uses the principle of the capillary viscometer described in "Y.

Further, in the present invention, a color pigment such as carbon black is uniformly mixed and the density unevenness of the molded product is small, so that the appearance is good. In particular, the present invention is preferably applied to the production of a resin molded product for a photographic light-sensitive material, because the light-shielding leakage is unlikely to occur because the uneven density is small. In particular,
It is preferably applied to the production of a resin molded product for a photographic light-sensitive material, which has a portion having a thickness of 2 mm or less and which secures light shielding.

The photographic light-sensitive material package is preferably constructed by assembling the photographic light-sensitive material package from the resin molded product for photographic light-sensitive material produced by the method of the present invention and the photographic light-sensitive material.

In the present invention, additives such as silicone, fatty acid amides, fatty acid esters, polysiloxanes and other slip agents, antioxidants and antistatic agents are added to the diluted resin pellets and master batch pellets. May be. In addition, these additives may be added before mixing the pellets and mixed at the same time when the pellets are mixed.

[0027]

EXAMPLES Examples of the present invention will be shown below, but the present invention is not limited thereto.

(Example 1) A spool for 135 film was molded as follows.

70 parts by weight of polystyrene resin for the base material of the masterbatch shown in Table 1 and oil furnace carbon black having an average particle diameter of 1.6 × 10 ⁻⁸ m for the masterbatch of pH 8.0 (# 950 manufactured by Mitsubishi Kasei Co., Ltd.) From 30 parts by weight, cylindrical master batch pellets each having a diameter and a height of 3 mm were formed.

[0030]

[Table 1]

Cylindrical diluted resin pellets each having a diameter and a height of 3 mm were formed from the diluted resin shown in Table 2.

[0032]

[Table 2]

The viscosities shown in Tables 1 and 2 are the apparent viscosities of the resin and the masterbatch. The values measured at a shear rate of 100 s ^-1 and a temperature of 230 ° C were used according to the operating conditions of the injection molding machine. ing. Shimadzu flow tester CFT-500 (made by SHIMADZU ^), which uses the principle ¹⁾ of a capillary viscometer, was used to obtain the shear rate-shear stress relationship.

1 part by weight of the formed masterbatch pellets and 42 parts by weight of the diluted resin pellets were uniformly mixed, and from the mixed pellets, N515 / BX (150t) manufactured by Sumitomo Heavy Industries, Ltd.
Spool for 135 film (thickness: about 1 mm) with a carbon black set concentration of 0.7 wt% under the following conditions: molding temperature 230 ° C, molding cycle 10 seconds, injection pressure 1500 kgf / cm ² (14.7 MPa). (There is a part that secures light shielding)
Was formed. The pellet mixing state index of the uniformly mixed mixed pellets was 0.3.

The carbon black concentration of the produced 135 film spool was measured by irradiating the molded product with laser light at the flange portion and measuring the amount of transmission. The results are shown in Table 3. Laser light with a wavelength of 1300 nm and an output of 1.9 mW was used to measure the carbon black concentration. Then, the carbon black concentration was measured for 50 samples, and the standard deviation value (σ) was divided by the average value (x _A ) to evaluate the variation coefficient value. In this embodiment, the variation coefficient value is preferably 0.07 or less. The rationale is as follows. The light-shielding limit value in consideration of the thickness of the measurement portion is 0.45 wt% in terms of the carbon black concentration value, and if the difference of 0.25 wt% from the set concentration of 0.7 wt% is not more than 5σ, there is a high possibility of defective products. Therefore, 5σ / x _A
Since it must be ≤0.25 / 0.7, the variation coefficient value σ /
x _A is desirably 0.07 or less.

[0036]

[Table 3]

As can be seen from Table 3, when the apparent viscosity μ _{MB of the} masterbatch pellets and the apparent viscosity μ _N of the diluted resin pellets satisfy μ _MB / μ _N <1, the coefficient of variation x _A is 0.07 or less in both cases. However, if the above conditions are not satisfied, the variation coefficient value σ / x _A exceeds 0.07, and there is a possibility that defective products will be produced. I understood.

(Example 2) Similar to Example 1, master batches having carbon black contents of 15 and 50 wt% were prepared, and using this, a set concentration of carbon black was set.
A 0.7 wt% 135 film spool was formed.

When the same experiment as in Example 1 was conducted, it was 50 wt.
Also in the case of%, the same results as in Example 1 are obtained. Further, in the case of 15 wt%, the variation coefficient value x _{A of} the molded product produced by the production method of the present invention is 0.7 of that of Example 1.
It was ~ 0.9 times, and it was found that there was an excellent effect.

Example 3 A light-shielding type resin can for a 135 film patrone was molded as follows.

70 parts by weight of polyethylene resin for the base material of the masterbatch shown in Table 4 and oil furnace carbon black having an average particle size of 1.6 × 10 ^-8 m (pH 8.0 for masterbatch) (# 950 manufactured by Mitsubishi Kasei) From 30 parts by weight, cylindrical master batch pellets each having a diameter and a height of 3 mm were formed.

[0042]

[Table 4]

Cylindrical diluted resin pellets each having a diameter and a height of 3 mm were formed from the diluted resin shown in Table 5.

[0044]

[Table 5]

The melt viscosities in Tables 4 and 5 are the apparent viscosities of the resin and the masterbatch, and the shear rate is 100 s ⁻¹ and the temperature is 160 ° C. according to the operating conditions of the injection molding machine.
The value measured in 1. is used. Shimadzu flow tester CFT-500 (made by SHIMADZU ^), which uses the principle ¹⁾ of a capillary viscometer, was used to obtain the shear rate-shear stress relationship.

1 part by weight of the formed masterbatch pellets and 42 parts by weight of the diluted resin pellets were uniformly mixed, and from the mixed pellets, N515 / BX (150t) manufactured by Sumitomo Heavy Industries, Ltd.
Injection molding machine, the molding conditions were a temperature of 160 ° C, a molding cycle of 13 seconds, and an injection pressure of 1200 kg / cm ² (11.8 MPa).
A light-shielding resin can for a 135 film patrone having a set concentration of carbon black of 0.28 wt% was formed. In addition,
The pellet mixing state index of the uniformly mixed mixed pellets was 0.3.

The carbon black concentration of the light-shielding type resin can for the 135 film patrone thus prepared was determined by irradiating the molded product with a laser beam at the bottom of the can (there is a portion for securing light shielding with a thickness of about 1 mm). The carbon black concentration was measured by measuring the amount of transmission. The results are shown in Table 6. In addition, for the measurement of carbon black concentration, wavelength 1300 nm, output
A 1.9 mW laser beam was used. Then, the carbon black concentration was measured for 50 samples, and the standard deviation value (σ) was divided by the average value (x _A ) to evaluate the variation coefficient value. In this embodiment, the variation coefficient value is preferably 0.07 or less. The rationale is as follows. The light-shielding limit value considering the thickness of the measurement part is the concentration value of carbon black.
0.18 wt%, the difference from the set concentration 0.28 wt% 0.10 wt% is 5
If it is not more than σ, there is a high possibility that a defective product will be produced. Therefore, since 5σ / x _A ≦ 0.10 / 0.28 must be satisfied, the coefficient of variation value σ / x _A is preferably 0.07 or less.

[0048]

[Table 6]

As can be seen from Table 6, when the apparent viscosity μ _{MB of the} masterbatch pellets and the apparent viscosity μ _N of the diluted resin pellets satisfy μ _MB / μ _N <1, the variation coefficient value σ / x _A is It was 0.07 or less, and there was no possibility of producing defective products. However, if the above conditions were not satisfied, the variation coefficient value σ / x _A exceeded 0.07, and there is a possibility of producing defective products. I knew it was.

(Example 4) As in Example 3, master batches having carbon black contents of 15 and 50 wt% were prepared and used to set carbon black at a set concentration.
A 0.7 wt% 135-film patrone light-shielding resin can was formed.

When the same experiment as in Example 1 was conducted, it was found to be 50 wt.
Also in the case of%, the same results as in Example 1 are obtained. Further, in the case of 15 wt%, the variation coefficient value σ / x _{A of} the molded product produced by the production method of the present invention is 0.7 to 0.9 times that of Example 3, and it is found that there is a further excellent effect. It was

(Example 5) In the same manner as in Examples 1 to 4, the master batch pellets and the diluted resin pellets were formed in the same manner except that they were each formed into a cylindrical shape having a diameter and a height of 1 mm. The pellet mixing state index of the uniformly mixed mixed pellets was 0.2. Then, when the same experiment as in Example 1 was performed, the variation coefficient value σ / x _{A of} the molded product produced by the production method of the present invention was 0.5 to 0.7 times that of Examples 1 to 4, which is more excellent. It turned out to be effective.

[0053]

EFFECTS OF THE INVENTION According to the present invention, even if the thickness is reduced, the light-shielding defect can be sufficiently prevented, and the density unevenness can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a minute portion of a molded product in which coarse particles are generated.

FIG. 2 is a schematic diagram showing a minute portion of a molded product molded by a conventional technique.

FIG. 3 is a schematic diagram showing a minute portion of a molded product molded according to the present invention.

Claims (19)

[Claims] 1. A method for producing a resin molded product for a photographic light-sensitive material, which comprises mixing a diluted resin pellet and a masterbatch pellet into a mixed pellet, and introducing the mixed pellet into an injection molding machine to perform injection molding. At a shearing rate of 100 S ⁻¹ at a plasticizing temperature of 100 μm, the apparent viscosity μ _MB of the master batch pellets and the apparent viscosity μ _N of the diluted resin pellets satisfy μ _MB / μ _N <1. For producing resin molded products for automobiles. 2. The method for producing a resin molded product for a photographic photosensitive material according to claim 1, wherein the diluted resin of the diluted resin pellet and the base resin of the masterbatch pellet are the same type of resin. 3. A photographic light-sensitive material obtained by mixing diluted resin pellets substantially made of polystyrene resin and master batch pellets containing carbon black to prepare mixed pellets, and introducing the mixed pellets into an injection molding machine for injection molding. In the method for producing a resin molded product for resin, the apparent viscosity μ _MB of the master batch pellets and the apparent viscosity μ _N of the diluted resin pellets at a temperature of 230 ° C. and a shear rate of 100 S ⁻¹ satisfy μ _MB / μ _N <1. A method for producing a resin-molded article for a photographic light-sensitive material, which is characterized. 4. A diluted resin pellet consisting essentially of polystyrene resin and a masterbatch pellet containing carbon black essentially consisting of polystyrene resin are mixed to form a mixed pellet, and the mixed pellet is an injection molding machine. In the method for producing a resin molded product for a photographic light-sensitive material, the apparent viscosity of the master batch pellets at a temperature of 230 ° C. and a shear rate of 100 S ⁻¹ μ _MB
And the apparent viscosity μ _N of the diluted resin pellets is μ _MB / μ _N <
1. A method for producing a resin-molded article for a photographic light-sensitive material, which satisfies 1. 5. A photographic light-sensitive material obtained by mixing diluted resin pellets substantially made of polyethylene resin and master batch pellets containing carbon black to prepare mixed pellets, and introducing the mixed pellets into an injection molding machine for injection molding. In the method for producing a resin molded product for resin, the apparent viscosity μ _MB of the master batch pellets and the apparent viscosity μ _N of the diluted resin pellets at a temperature of 160 ° C. and a shear temperature of 100 S ⁻¹ satisfy μ _MB / μ _N <1. A method for producing a resin-molded article for a photographic light-sensitive material, which is characterized. 6. A diluting resin pellet consisting essentially of polyethylene resin and a masterbatch pellet containing carbon black substantially consisting of polyethylene resin as a base material are mixed into a mixed pellet, and the mixed pellet is injected into an injection molding machine. was charged to a method of producing photographic light-sensitive material for a resin molded product to be injection-molded, at a temperature 160 ° C. shear temperature 100S ^-1, the master batch pellets of the apparent viscosity mu _MB
And the apparent viscosity μ _N of the diluted resin pellets is μ _MB / μ _N <
1. A method for producing a resin molded product for a photographic light-sensitive material, which satisfies 1. 7. The average particle size of the diluted resin pellets is 0.5 m
7. The photographic light-sensitive material according to claim 1, wherein the masterbatch pellet has an average particle size of 0.5 mm or more and 3.5 mm or less, and m or more and 3.5 mm or less. Production method of resin molded products. 8. The mixed pellets are uniformly mixed at the time of injection molding.
3, 4, 5, 6, or 7, a method for producing a resin molded product for a photographic light-sensitive material. 9. A method for producing a resin molded product for a photographic light-sensitive material, which comprises mixing a diluted resin and a masterbatch pellet containing a color pigment, and charging the mixture into an injection molding machine to perform injection molding. At a plasticization temperature of 100 S ^-1 , the apparent viscosity μ _{MB of the} masterbatch pellets and the apparent viscosity μ _{N of the} diluted resin are μ _MB.
/ Μ _N <1 is satisfied, a method for producing a resin molded product for a photographic light-sensitive material. 10. The method for producing a resin molded product for a photographic light-sensitive material according to claim 9, wherein the diluted resin and the base resin of the masterbatch pellet are the same type of resin. 11. A method for producing a resin-molded article for a photographic light-sensitive material, which comprises mixing a diluted resin substantially made of polystyrene resin and a master batch pellet, and introducing the mixture into an injection molding machine to perform injection molding. ℃ shear rate 1
Apparent viscosity of the masterbatch at 00S ^-1 μ _MB
And the apparent viscosity μ _{N of the} diluted resin satisfies μ _MB / μ _N <1. 12. A diluting resin consisting essentially of polystyrene resin and a masterbatch pellet containing a coloring pigment consisting essentially of polystyrene resin are mixed, and the mixture is put into an injection molding machine and injection molding is performed. In the method for producing a resin molded product for a photographic light-sensitive material, the apparent viscosity μ _{MB of the} masterbatch and the apparent viscosity μ _{N of the} diluted resin at a temperature of 230 ° C. and a shear rate of 100 S ⁻¹ are μ _MB / μ _N <1
A method for producing a resin molded product for a photographic light-sensitive material, characterized in that: 13. Production of a resin molded product for a photographic light-sensitive material, which comprises mixing a diluted resin substantially consisting of a polyethylene resin and a masterbatch pellet containing a color pigment, and introducing the mixture into an injection molding machine to perform injection molding. In the method, the resin for a photographic light-sensitive material is characterized in that the apparent viscosity μ _{MB of the} masterbatch and the apparent viscosity μ _{N of the} diluted resin at a temperature of 160 ° C. and a shear temperature of 100 S ⁻¹ satisfy μ _MB / μ _N <1. Method of producing molded products. 14. A diluting resin consisting essentially of a polyethylene resin and a masterbatch pellet containing a coloring pigment consisting essentially of a polyethylene resin are mixed, and the mixture is put into an injection molding machine and injection molding is performed. In the method for producing a resin molded product for a photographic light-sensitive material, the apparent viscosity μ _{MB of the} masterbatch and the apparent viscosity μ _{N of the} diluted resin at a temperature of 160 ° C. and a shear temperature of 100 S ⁻¹ are μ _MB / μ _N <1.
A method for producing a resin molded product for a photographic light-sensitive material, characterized in that: 15. The diluted resin is a pellet, the average particle size of the pellet is 0.5 mm or more and 3.5 mm or less, and the average particle size of the masterbatch pellet is 0.5 mm or more and 3.5 mm or less. Claims 9, 10, 1 characterized
A method for producing a resin molded article for a photographic photosensitive material of 1, 12, 13 or 14. 16. The photograph according to claim 9, wherein the diluted resin is pellets, and the mixture is uniformly mixed at the time of injection molding. Production method of resin molded products for photosensitive materials. 17. The resin molding for the photographic light-sensitive material is 2 mm
A portion having the following thickness to secure light shielding, 1, 2, 3, 4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15 or 16 method for producing a resin molded product for a photosensitive material. 18. The method according to claim 1, 2, 3, 4, 5, 6, 7,
A method for producing a colored resin molded product, which is produced by the same production method as the resin molded product for a photographic photosensitive material of 8, 9, 10, 11, 12, 13, 14, 15, 16 or 17. 19. A method for producing a photographic light-sensitive material package, wherein a resin-molded article for photographic light-sensitive material has a portion for securing light shielding of the photographic light-sensitive material, wherein
A resin molded product for a photographic photosensitive material is produced by the method for producing a resin molded product for a photographic photosensitive material according to 7, 8, 9, 10, 11, 12, 12, 13, 14, 15, 16 or 17 A method for producing a photographic photosensitive material package, comprising assembling the photographic photosensitive material package from a resin molded product and the photographic photosensitive material.