JPH10197995A - Corrugated carton for photosensitive material and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the pinhole and the tear of a moistureproof and light shielding packing bag which fatally causes trouble on photosensitive material and to protect and keep the photosensitive material by providing plural continuous weakened lines nearly orthogonally to a flute direction and prevented from piercing a corrugated board at an almost center position on the top panel of a corrugated carton. SOLUTION: One moistureproof and light shielding packing body 2 in which the photosensitive material wound in a roll state is hermetically enclosed is housed in the corrugated carton for photosensitive material 1. The weakened line 4 is provided nearly orthogonally to the flute direction A at the almost center position on the top panel 3 of the carton 1. Two lines 4 are provided in parallel and the carton 1 is opened by tearing the part of the line 4 from a tearing start end 5. By providing the line 4 as the unpacking port of the carton in the center in such a way, the deflection of the top panel 3 by the weight of the carton 1 located upper when the cartons are piled up is made large by the line 4 and the photosensitive material housed inside is held by the top panel 3, so that the movement of the photosensitive material inside is restrained in the case of transportation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cardboard box for photosensitive material, and more particularly to a cardboard box for photosensitive material containing a roll of photosensitive material, a method of manufacturing the same, and a photosensitive material package using the same.

[0002]

2. Description of the Related Art Conventionally, regarding the performance of a photosensitive material paper container for storing and transporting a photosensitive material, particularly in a cardboard box used as the container, the photosensitive material is hermetically sealed with a light-shielding packaging material. It is made considering only the suitability of transporting and storing the photosensitive material package in the state (sealed light-shielding bag etc.). All the properties related to photographic performance are satisfied by the packaging material (sealed light-shielding bag, etc.) that seals each light-sensitive material in a light-tight and light-tight package. By adding another packaging material between the package and the photosensitive material package, multiple packaging was performed to satisfy each requirement.

[0003]

However, in recent years, there has been a demand for reducing the occupied space of the photosensitive material paper container in view of various circumstances such as storage / transportation and disposal after use. In addition, automation and mass processing have progressed,
There is a tendency that the winding diameter, volume and weight per photosensitive material packaged in a light-shielding packaging bag increase. Further, high-speed box manufacturing suitability, suitability for recycling, ease of unpacking, etc. are required while accommodating photosensitive materials of a plurality of sizes. Therefore, in order to avoid multiple packaging as much as possible, it is required to add further performance to the above-mentioned photosensitive material paper container having only a single function, which is related to the photographic performance required for other packaging materials. . Moreover, in addition to suitability for recycling and incineration after use, it is required to reduce costs by using waste paper and high yield.

Among them, for example, a cardboard box container (hereinafter, referred to as a cardboard box) which is a container made of a photosensitive material paper for protecting, storing, or properly transporting the above-described photosensitive material package, which is currently used, for example. In a case, when a plurality of photosensitive materials each having a different size packed in a moisture-proof light-shielding packaging bag are stored in a cardboard box of one size, a gap between the packaging bag and the cardboard box increases, and a cushioning material or the like must be filled in the gap. There is a problem that the photosensitive material moves in the box during transportation or the like, and pinholes or tears occur in the moisture-proof light-shielding packaging bag.

An object of the present invention is to solve such a problem,
Corrugated cardboard boxes for photosensitive materials that protect and store the photosensitive materials without causing pinholes or tears in the moisture-proof and light-shielding packaging bags that cause catastrophic failure of the photosensitive materials, and that do not impair the ease of unpacking, and the manufacture of the cardboards It is to provide a method.

[0006]

The above object is achieved by the following constitutions of the present invention. A cardboard box for storing photosensitive material, wherein two or more continuous lines of weakening are provided at a substantially central position of a top surface of the cardboard box so as not to penetrate the cardboard substantially orthogonal to the direction of the flute. A cardboard box for photosensitive material, wherein the weakening line is an opening for opening the cardboard box, and the top surface is bent so that the photosensitive material inside can be held when the cardboard boxes are stacked. In the above, a corrugated cardboard box for a photosensitive material, wherein the line of weakness is formed by leaving at least a liner on one side of the corrugated cardboard. The cardboard box for a photosensitive material according to the above, wherein a tearing start end of the line of weakness projects from an edge of the cardboard box. A cardboard box for photosensitive material according to any one of the above, wherein a single-edged zipper is provided on both sides of the cardboard box orthogonal to the line of weakness. In the above-mentioned items (1) to (4), a corrugated cardboard box for a photosensitive material having a configuration in which a notch is provided at an edge portion to be connected to a connection margin when the cardboard box is joined. In any of the above, the photosensitive material is a roll-shaped photosensitive material sealed and wrapped in a moisture-proof light-shielding packaging bag, and is held in the axial direction of the roll by bending of the top surface of the cardboard box. In the above, the moisture permeability (JIS)
A temperature of 40 ± 0.5 ° C. which is the condition B of Z 0208,
Measured at a relative humidity of 90 ± 2%) is 10 g / (24 hours · m
² ) A cardboard box for a photosensitive material in which the innermost is a polyolefin resin layer. In the above, the winding diameter of the roll-shaped photosensitive material is 15
Cardboard box for photosensitive material that is 0 mm or more. Liner basis weight (JIS P 8124) is 230 ~
350 g / m ^2, the corrugated medium basis weight (JIS P 8124) is 125~250g / m ^2, the main component creates a double-faced cardboard sheet by the adhesive is a starch, a double-sided corrugated cardboard sheet slitter-scorer and a cutoff device Is formed in a desired shape of a quadrilateral, printed on the sheet surface formed in the desired shape, and the printed sheet is punched into a box developing die by a flat punching machine, which becomes the top surface of the cardboard box of the punched sheet. At the substantially central position of the surface, two or more continuous lines of weakness are formed substantially perpendicular to the direction of the flutes and do not penetrate the corrugated cardboard, and the photosensitive material is wrapped in a moisture-proof light-shielding packaging bag to produce a punched sheet. Method of manufacturing cardboard boxes.

As described above, by providing the weakening line in the above-described state as the unpacking opening substantially at the center position of the top surface of the cardboard box, the weakening line is used when the cardboard boxes are stacked one upon another. Of the top surface capable of holding the top surface. Therefore, the photosensitive material is pressed down inside the cardboard box by the bending of the top surface due to the stacked weight, and during transportation, etc., the cushioning material is not inserted into the gap between the photosensitive materials inside the cardboard box, but inside the cardboard box. The photosensitive material does not move, so that pinholes and tears do not occur in the moisture-proof and light-shielding packaging bag. The operation and effect of the present invention, in the case of a roll-shaped photosensitive material, increase as the winding diameter increases. Therefore, the present invention is particularly effective when the rolled photosensitive material has a winding diameter of 150 mmφ or more, preferably 2 mm or more.
00 mmφ or more, more preferably 250 mmφ or more, particularly preferably 300 mmφ or more, most preferably 330 mmφ or more.
mmφ or more. Therefore, it is most effective for a long product having a length of 1000 feet (the winding diameter is about 310 mmφ) or more, which is compatible with recent high-speed processing.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to a perspective view of a cardboard box for photosensitive material according to an embodiment of the present invention shown in FIG. In this embodiment, one moisture-proof and light-shielding package 2 in which a photosensitive material wound in a roll shape is sealed in a cardboard box 1 for a photosensitive material. On the top 3 of the cardboard box,
At this substantially central position, a weakening line 4 is provided substantially orthogonal to the flute eye direction A. Two of the weakening lines 4 are provided in parallel, and the cardboard box is unpacked by tearing the weakening line 4 from the tearing start end 5. Furthermore, this weakening line 4
Although a zipper is used in FIG. 1, a perforation may be used, and the shape, dimensions, and forming method are not particularly limited, and a known one may be selected and used according to the purpose. Furthermore, a state in which a continuous cut line is inserted only on either the back surface or the front surface of the top surface 3, that is, a form in which a single-sided liner is left may be adopted. Further, a single-edge zipper is provided on both sides 6, 7 of the cardboard box orthogonal to the weakening line 4.

As described above, since the weakening line 4 serving as the cardboard box unpacking opening is provided at the center, the bending of the top surface is reduced by the weight of the cardboard box on which the cardboard box is placed when stacked.
The top surface suppresses the photosensitive material contained therein, thereby suppressing movement inside during transportation or the like, and preventing pinholes or breakage of the moisture-proof / light-shielding bag. Such effects can be confirmed by the embodiments described later. In addition, as for the photosensitive material to be stored in the inside, the above-mentioned roll-shaped photosensitive material is advantageous because the holding force can be maintained by the axis, but in addition to the roll-shaped material, a laminated sheet-shaped photosensitive material can be used. Materials can also be stored.

Next, FIG. 2 is a development view of a cardboard box for photosensitive material according to an embodiment of the present invention. As shown,
This is a wrap-around type cardboard box, and when making a box, the moisture-proof and light-shielding package 2 in which the photosensitive material is sealed is placed on the expanded state, and the connection margin 8 and the connection edge 9 are formed.
Are connected by an adhesive or the like, and the other flaps are also folded and bonded. In the photosensitive material cardboard box 1 of the embodiment shown in FIG. 1, a box for storing only one package 2 in which a roll-shaped photosensitive material is sealed is shown, but as shown in FIG. May be stored as flat,
As shown in FIG. 3 (b), it may be stored as a stack.

Further, the cardboard box for photosensitive material of the present invention comprises:
Liner basis weight (JIS P 8124) 230-35
0 g / m ² , core basis weight (JIS P 8124) is 12
It is made by producing a double-faced corrugated cardboard sheet of 5-250 g / m ² , the main component of the adhesive being starch. Here, the liner basis weight is less than 230 g / m ² and the core basis weight is 12
Because it is less than 5 g / m ² to insufficient compressive strength of the double-faced cardboard sheet, for example, the liner basis weight which is used in large quantities in the market 220 g / m ^2, in the corrugated fiberboard sheet amount corrugated medium basis is 120 g / m ² is present The purpose of the invention cannot be achieved. Further, if the liner basis weight is 350 g / m ² or more and the core basis weight is 250 g / m ² or more, it becomes expensive,
In addition, the strength of the photosensitive material is too strong, the top surface is slightly bent, and the stored photosensitive material cannot be held. In addition, the box making characteristics are also reduced.

The adhesive is preferably one whose main component is starch. Particularly suitable adhesives have a temperature of 40 to 80% with 5 to 25% by weight of starch and at least 0.2 to 1.0% by weight of sodium hydroxide. A carrier part liquid A swelled and destroyed by heated water at a temperature of 20 ° C. and a main part liquid B obtained by dispersing 20 to 40% by weight of starch together with at least 0.3 to 2% by weight of borax in warm water at a temperature of 20 to 50 ° C. And A / B = 0.3 to
An adhesive mixed at a ratio of 0.7,
H10 ~ 14, Zahn cup viscosity at 40 ° C is 15 ~ 6
A time of 0 seconds is preferred. Types of starch include corn, potatoes, taro, soybeans, rice, wheat and the like, but are not particularly limited, without adversely affecting photographic properties,
Corn starch is particularly preferred because of its high adhesive strength and uniform quality.

It is preferable to use such starch in a pH of 3.5 to 5.5 in terms of preservability and ensuring uniformity of quality. Therefore, the water doubling ratio (total water / total starch) is preferably 2.2 to 3.8 times. By using such an adhesive when producing a corrugated cardboard sheet, a corrugated cardboard sheet having sufficient strength can be provided.
The moisture permeability of the moisture-proof light-shielding packaging bag that seals the photosensitive material (JIS
Z 0208 condition B, measured at a temperature of 40 ± 0.5 ° C. and a relative humidity of 90 ± 2%) is 10 g / (24 hours.
m ² ) or less, and the innermost layer is a homopolyethylene resin, an ethylene-α-olefin copolymer resin,
It is preferable to use a polyolefin resin layer containing a vinyl acetate copolymer resin, an ethylene / ethyl acrylate copolymer resin, a polyolefin elastomer, or the like as a main component.

Next, a process for producing a corrugated cardboard sheet for a photosensitive material will be described. FIG. 4 is a schematic view illustrating a manufacturing process by a corrugator for manufacturing a corrugated cardboard sheet. On the single facer side, liner roll 1
0 to one side of the liner S _1,
Sheet S ₂ for the corrugating is supplied from. Liner S ₁
Is heated by the heating roll 12 and then sent out to a bonding position with the core. On the other hand, the sheet S ₂ for the central core is initially wound on the upper roll 31 of the wave form, will be formed and is further nipped and conveyed between the lower roll 32 of the wave corrugated. Next, the manufacturing unit 30 of the single-faced corrugated board, glue roll 35 and the doctor roll 34 is glue machine is disposed in contact with the roll at the bottom of the lower roll 32 of the wave form, for the central core of the sheet S ₂ adhesive having components described above to the contact surface of the liner S ₁ is caused to adhere. Thereafter, between the press roll 33 which is arranged in contact with the lower roll 32 downstream of the glue roll 35 and its lower roll 32, and the sheet S ₂ and the liner S ₁ for the central core is sandwiched by superimposed is bonded Te, the state of the single-faced corrugated fiberboard sheet S _3.

Next, the double facer side, the single-faced corrugated board S ₃ produced is conveyed by a bridge 40 which is disposed above the corrugating roll 20, after being heated by the heating roll 42, the liner S ₁ is An adhesive having the above-described components is adhered to the non-adhered side by the glue roll 44. On the other hand, the liner S ₄ for the other surface is supplied from the liner roll 50, and the single-sided corrugated cardboard sheet S ₃ and the liner S ₄ are superimposed upstream of the hot platen 60,
Is conveyed as it is immobilized glue with heat and pressure by the heat plate 60, after being unloaded as corrugated fiberboard sheet S _5,
Corrugated fiberboard sheet S ₅ is cut into a desired size as a sheet of a square by a slitter-scorer and a cutoff device, is sent to the storage unit 70. By the above manufacturing process, a wrap-around type A flute double-faced corrugated cardboard sheet used in the present invention shown in a sectional view in FIG. 5 is obtained. In this sheet, a liner 90 is adhesively laminated on both sides of the core 92, the height h of the step is 2.3 to 6 mm, and the number of peaks of the step is three.
A double-faced cardboard sheet having 0 to 55 pieces / 30 cm and a corrugation rate of 1.30 to 1.70 is produced.

Next, printing is performed on the surface of the double-faced cardboard sheet. In this printing, JISK6301-1995
Spring hardness Hs (JISA) of the measuring method is 30 to 55
Flexographic printing using a rubber plate or a resin printing plate and a flexographic ink is suitable.

As the ink in the flexographic printing, UV ink, oil-based ink, water-soluble ink and the like are used. Typical synthetic resins used as the ink at this time include copolymer resins mainly composed of vinyl chloride, vinyl amino resin, alkyd vinyl resin, oil-free alkyd resin, vinyl chloride vinyl chloride, nitrated cotton, Polyester, polyamide urethane, polyacrylic, rosin-modified maleic acid, ethylene vinegar, vinyl ether, urethane vinegar,
Salted vinegar biurethane resin, modified alkyd resin, modified phenolic resin, high-molecular polyester / amino resin, low-molecular polyester / amino resin, alkali-soluble resin (rosin-modified maleic resin, styrene maleic resin, styrene acrylate resin, acrylate ester Acrylic resin, methacrylate acrylate resin), hydrosol type resin (styrene maleate resin, styrene acrylate resin, α-methyl styrene acrylate resin, acrylate acrylate resin, methacrylate acrylate resin), emulsion Mold resin (styrene resin,
Styrene acrylate resin, acrylate copolymer resin, methacrylate copolymer resin). Surface strength improvement, abrasion resistance improvement, printability improvement,
It is preferable to perform sizing (beater addition, size press, tab press, etc.) by various methods in order to improve adhesive strength and prevent generation of whiskers and paper dust. As the surface sizing agent, for example, a sizing agent such as gelatin, modified starch, and carboxy-modified polyvinyl alcohol is used in an amount of 0.05 to 10 g / m 2.
It is preferable to apply ^two .

After this printing, a punching step of punching the corrugated cardboard sheet into an unfolded box by a flat punching machine (not shown) is performed. Further, as described above, two or more continuous weakening lines that do not penetrate the corrugated cardboard are formed substantially perpendicular to the direction of the flute at substantially the center position of the top surface of the corrugated cardboard box of the punched sheet. Further, a single-edge zipper is provided at a position on both sides of the cardboard box orthogonal to the line of weakness. Then, the photosensitive material is wrapped from the thus punched sheet to make a box as a cardboard box.

Here, if the single-sided zippers on both sides 6 and 7 of the corrugated cardboard box for photosensitive material 1 of the embodiment shown in FIG. Since it is exposed, if it is handled as it is, an accident that cuts the skin may occur. Therefore, FIG.
As shown in FIG. 7, an edge crushing roller 80 may be provided to crush a sharp corner during the conveyance of the cardboard box 1 to the arrow B after the box is made. FIG. 7 shows one example of the printing mode.

Here, the basis weight (JIS P 8124) of the liner 90 shown in FIG.
350 g / m ² is appropriate, preferably 280~350g / m ^2, particularly preferably 280~320g / m ^2, and most preferred is 300~320g / m ^2. Further, the basis weight (JIS P 8124) of the core 92 is suitably from 120 to 250 g / m ² as described above, and from 130 to 240 g / m ^2.
g / m ² it is preferred, particularly preferably 140~230g / m ^2, and most preferred is 150~220g / m ^2.

When the roll diameter of the roll-shaped photosensitive material is 300 mm or more, the effect of the present invention is remarkably exhibited. Here, as the weakening line 4, there is a zipper as shown in FIG. 1, but it may be a perforation, and further, a state where a continuous cut line is inserted only on either the back surface or the top surface of the top surface 3. That is, a form in which a single-sided liner is left may be used. In the case where the weakening line 4 is a zipper as shown in FIG.
The range of the zipper position is ±
70 mm, preferably ± 50 mm, more preferably ± 3
0 mm, most preferably ± 10 mm, is provided at one or more locations. The zipper is preferably provided with both ends connected.

At this time, the shape and size of the zipper are, as shown in FIG.
~ 60 degrees, preferably 30-60 degrees, more preferably 3 degrees
The angle b is 5 to 55 degrees, particularly preferably 40 to 50 degrees, and the length b of the conducting wire 96 in the cutting direction connected from the cut portion 94 is 6 to 15 mm, preferably 7 to 14 mm, more preferably 8 to 13 mm, and particularly preferably. Is 9 to 12 mm, and the distance a between the conductor 96 and the adjacent conductor 96 is 1 to 12 m.
m, preferably 2 to 11 mm, more preferably 3 to 10
mm, particularly preferably 4 to 8 mm. And FIG.
FIG. 8B shows the double-edged zipper as the weakening line 4 in FIG.
(C) shows the most preferable conditions of the interval a, the length b, and the angle θ of the single-blade zippers provided on both sides 6 and 7 of the cardboard box. By the way, in the case of a double-edged zipper, a: 5 mm,
b: 10 mm, θ: 45 degrees, in the case of a single-edged zipper, three are a: 4 mm, b: 10 mm, θ: 45 degrees from the opening end, and a: 7 mm and b: 10 mm from the fourth end. The shape of the punching blade used to form the zipper and / or perforation may be a straight blade or a corrugated blade.

FIG. 9 is a development view of a cardboard box for photosensitive material according to another embodiment. In this, the connection edge 9
Other than that, the configuration is the same as that of FIG. 2, and thus the same reference numerals are given to the same elements. The connection edge 9 is provided with a notch as shown in the figure, and when the connection margin 8 is connected to the connection edge 9, a moisture-proof / light-shielding bag is sandwiched and adhered, making it difficult to take out the photosensitive material. Disappears. As shown in the enlarged view, the notch has both ends formed with a predetermined gap 9a with respect to the flap to ensure the connection between the connection margin 8 and the connection edge 9. Further, by providing the notch, the above-described bending of the top surface can be more easily provided, and a greater effect can be obtained with respect to holding the photosensitive material inside. The depth of this notch is 5mm
The degree is appropriate, and the predetermined interval 9a is 50 to 5
About 5 mm is preferable.

As the cardboard box to which the present invention can be applied,
In addition to the above photosensitive materials, cardboard boxes for heat-sensitive photosensitive materials, cardboard boxes for diffusion transfer type photosensitive materials, cardboard boxes for heat-developable photosensitive materials, cardboard boxes for photosensitive materials using photosensitive resin, photosensitive micro There is a cardboard box for capsule pressure sensitive paper.

[0025]

Embodiments of the present invention will be described below. (Embodiment 1) FIG. 6 used in this embodiment 1 is a cross-sectional view of a wrap-around A-flute double-faced corrugated cardboard sheet. It is manufactured by the corrugator shown in FIG. Among them, the basis weight (J
IS P 8124) is 320 g / m ² , the basis weight of the core 92 (JIS P 8124) is 180 g / m ² , the main component of the adhesive is starch (corn starch), and the coating amount is 3.5.
Ｇ5.5 g / m ² . The characteristics of the liner 90 include a density of 0.8 g / m ³ and a thickness of 410 μm.
m, water content: 7.2%, and the properties of the core 92 are density: 0.7 g / m ³ , thickness: 257 μm, and water content: 8.0%. And the height h of the step is 4.5
mm, the number of steps is 35/30 cm, and the step repetition rate is 1.55.
A flute corrugated cardboard sheet. The adhesive strength on the single facer side of the double-faced cardboard sheet thus produced was 24 kg · f / 40 cm ² , and the adhesive strength on the double facer side was 25 kg · f / 40 cm ² .

Further, a punching step of punching the double-faced corrugated cardboard sheet into a development die shown in FIG. 2 is performed. The size of the cardboard is W ₁ : for each side shown in FIG.
_{91mm, W 2: 88mm, L} 1: 422mm, L 2:
419 mm, D: 433 mm, H ₁ : 90 mm, H ₂ :
87 mm, H ₃ : 90 mm, H ₄ : 96 mm. In addition, between the flaps, any of 3 mm and 5 mm is described as a numerical value of a margin for bending a cardboard.
Numerical values with R represent curvature. Further, from the above numerical values, Y is 611 mm and X is 1060 mm.
Further, the double-edged zipper shown in FIG. 8B is formed as a weakened line 4 at a substantially central position of the top surface of the punched sheet to be the top surface of the cardboard box.
The single-edged zipper shown in (c) is formed.

In this printing, JISK6301-1995
A flexographic printing using a flexographic ink and a rubber plate having a spring hardness Hs (JISA) of 45 in the measuring method is performed. Using the printed wrap-around punched sheet, a width 8.25c sealed in a moisture-proof and light-shielding packaging bag
m, roll-shaped photosensitive material having a winding length of 530 m (Fuji color paper, diameter of glossy surface: 395 mm, diameter of silk surface: 40)
1 mm) to form a rolled photosensitive material-containing cardboard box. When the rolled photosensitive material storage cardboard boxes are stacked in two layers, the sink at the top center position E and the single-edge zipper portion F of the rolled photosensitive material storage cardboard box shown in FIG. 3mm,
It was 0.1 to 1 mm at the single-edge zipper portion F.

The following impact test and zipper strength test were carried out on the above-mentioned rolled photosensitive material-containing cardboard box. Test 1 (Inclination Impact Test ) FIG. 11 is a schematic view of an inclined surface used for the test. In this, the sliding distance S and the sliding angle Θ are shown, and the test is a collision at the end point of the inclined surface. Then, there is the following relational expression between the sliding distance S, the sliding angle Θ, and the collision speed V: S = (1 / sinΘ) × V ² / 2G where G: gravitational acceleration

Table 1 below is a quick reference table of the sliding distance S and the collision speed V.

[0030]

[Table 1]

In this test, in Table 1, the case where the collision speed V is 5 km / h and the case where the collision speed V is 7 km / h are shown in FIG.
As shown in the cardboard box layout diagram of FIG.
The roll-shaped photosensitive material storage cardboard box 86 of this embodiment and the roll-shaped photosensitive material storage cardboard box 87 of the comparative example are arranged in two rows, and 16 rows, that is, 4 × 16 layers are stacked in this arrangement, and stretch winding is performed. In the embodiment, a tilt impact test was simultaneously performed on the example product and the comparative example product. Further, as shown in the drawing, the collision speed was 7 km / h, and the collision was carried out 10 times in the direction in which the part K of one cardboard box hits the part J of the other cardboard box, and the part J In the direction of collision with K, the collision speed is 5 km / h,
Ten collisions were performed.

(Comparative Example 1) Here, the cardboard box of Comparative Example 1 was the same as that of Example 1, except that the rolled photosensitive material-containing cardboard box was not provided with a double-edged zipper at the center. A box was used. Here, FIG.
As shown in FIG. 0, the sink at the top surface center position E and the single-edge zipper portion F is about 0.
5 to 1.5 mm, 0.1 to 0.5 m with single-edge zipper part F
m.

Table 2 below shows the results of the tilt impact test and the evaluation results.

[0034]

[Table 2]

As can be seen from Table 2, in Example 1, the breakage of the packaging bag was remarkably improved.

Second Embodiment Next, a second embodiment will be described with reference to FIG. The rolled photosensitive material storage cardboard box of the second embodiment is the same as that of the first embodiment except for a cutout provided at the connection edge 9. The same applies to the photosensitive material packaging bag stored inside. And this notch
The depth is set to 5 mm, and the length along the edge 9 is set to 368 mm. The same test as in Example 1 was conducted on the rolled photosensitive material storage cardboard box of Example 2. First, the sink at the top center position E and the one-edge zipper portion F (notch side) of the roll-shaped photosensitive material storage cardboard box shown in FIG. 0.1-1.5 mm,
The inner roll photosensitive material is completely sandwiched between the bottom surface and the top surface. Regarding the tilt impact test, the conditions were the same as in Example 1, and the test was performed together with the comparative example product.

As a result of each test, the moisture-proof and light-shielding bag, which had some problems in Example 1, was not damaged at all, and a better result was obtained than the cardboard box of Example 1. In addition, it was good without any other adverse effects. Of course, connect 8
At the time of connection between the light-sensitive material and the connection edge 9, the moisture-proof / light-shielding bag is sandwiched and adhered, so that it is not difficult to take out the photosensitive material.

Test 2 (zipper strength test) The following test was performed on the rolled photosensitive material-containing cardboard box of Example 1 to examine the openability. The tear strength was determined by using a pull-out resistance value measured by a push-pull measuring instrument. * Central zipper (double-edge zipper, zipper width: 15m)
m) Tear strength from the start of tearing (five times): First time: 4.5-5.5 kg Second time: 4.5-4.0 kg Third time: 4.5-5.0 kg Fourth time: 4 0.5 kg Fifth test: 4.5 kg Average: 4.6 kg (MIN: 4.0 kg, MAX: 5.5 kg)
* Tear strength of edge zipper (single-edge zipper) (implemented 5 times on one side only): (Fig. 13 shows the tearing form. The process is as follows: after tearing off the central zipper and removing it, distance h from the measuring edge ₁ : 13-15 kg Second: 11 kg Third: 12 kg Fourth: 14-12 kg Fifth: 11-13 kg Average: 12.6 kg (MIN: 11 kg, MAX: 15
kg)

Comparative Example 2 of Test 2 As a comparative example, a cardboard box in which perforations are arranged at the edges as shown in FIG.
As shown in FIG. 4 (b) (Comparative Example 3), a cardboard box provided with perforations at the edges and a flap zipper was tested and compared with Example 1. It is measured by the push-pull measuring device described above. In FIG. 14A (Comparative Example 2)
For the cardboard box : * Tear strength of the perforation on the side where the hook is located (5 times): First: 13 kg Second: 14.5 kg Third: 12.7 kg Fourth: 14.0 kg Fifth: 14 0.7kg Average: 13.8kg (MIN: 12.7kg, MAX:
14.7kg) * Tear strength of perforation at the edge without hook (5
Times): (h ₂ : 100 from the edge to the hook)
First time: 13 kg Second time: 14.5 kg Third time: 12.7 kg Fourth time: 14.0 kg Fifth time: 14.7 kg Average: 13.8 kg (MIN: 12.7 kg, MAX:
14.7kg)

FIG . 14 (b) (Comparative Example 3)
In contrast, * zipper part (double-edged zipper, zipper width: 20mm)
Tear strength from the start of tearing (5 times): First time: 2.5 kg Second time: 3.0 kg Third time: 2.8 kg Fourth time: 2.3 kg Fifth time: 4.1 kg Average: 2.94 kg ( MIN: 2.3 kg, MAX:
4.1 kg) * perforation tear strength of the edge portion (5 times embodiment) :( from the edge portion toward the zipper direction h _3: pulling at 100mm away) first time: 14.5 kg second time: 14.0 kg Third: 14.2 kg Fourth: 13.0 kg Fifth: 11.5 kg Average: 13.4 kg (MIN: 11.5 kg, MAX:
14.5kg)

Table 3 shows the results of these evaluations.

[0042]

[Table 3]

[0043]

According to the cardboard box for photographic light-sensitive material of the present invention, two or more cardboard boxes which do not penetrate the cardboard in a direction substantially perpendicular to the direction of the flute at substantially the center of the top surface of the cardboard box. By providing a continuous weakening line, it is possible to prevent pinholes and tears in the moisture-proof and light-shielding bag without causing breakage in the cardboard box, and to easily take out the photosensitive material from the cardboard box. Furthermore, the wrap-around method enables high-speed box making without damaging the moisture-proof and light-shielding bag. Further, even in the case where a large number of cardboard boxes are stacked, no damage is given to the moisture-proof / light-shielding bag.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cardboard box for photosensitive material according to an embodiment of the present invention.

FIG. 2 is a development view of a cardboard box for photosensitive material according to the embodiment of the present invention.

FIG. 3A is a perspective view showing a stored state in which a number of packages are placed flat. (B) A perspective view showing a stored state in which a large number of packages are stacked.

FIG. 4 is a schematic diagram illustrating a manufacturing process using a corrugator for manufacturing the corrugated cardboard sheet of the present invention.

FIG. 5 is a cross-sectional view of an A-flute double-faced cardboard sheet used in the present invention.

FIG. 6 is a configuration diagram of crushing a corner of a cardboard box after box making.

FIG. 7 illustrates an example of a printing mode.

FIG. 8A is a view showing the shape and size of a zipper. (B) The figure which shows the optimal size of a double-edged zipper. (C) The figure which shows the optimal size of a single blade zipper.

FIG. 9 is a development view of a cardboard box for photosensitive material according to another embodiment.

FIG. 10 is a perspective view showing the sunken state of the rolled photosensitive material storage cardboard box of the present invention.

FIG. 11 is a schematic view of an inclined surface used for an inclined impact test.

FIG. 12 is a layout diagram of a cardboard box for a tilt impact test.

FIG. 13 is a perspective view showing a single-edged zipper tearing mode.

14A is a perspective view showing a cardboard box of Comparative Example 2. FIG. (B) A perspective view showing a cardboard box of Comparative Example 3.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Liner roll 20 Core roll 30 Single-sided corrugated cardboard manufacturing part 35,44 Glue roll 50 Liner roll 60 Heating board 70 Storage part A Flute direction

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI G03C 3/00 590 G03C 3/00 590Z B31B 1/90 301 B31B 1/90 301

Claims (9)

[Claims] 1. A cardboard box for storing a photosensitive material, wherein two or more cardboard boxes are provided substantially at a center position of a top surface of the cardboard box so as not to penetrate the cardboard substantially orthogonally to the direction of the flute. Wherein the weakening line is an unsealing opening of the cardboard box, and gives a top surface flexure so that the photosensitive material inside can be held when the cardboard boxes are stacked. Cardboard boxes for materials. 2. The cardboard box for a photosensitive material according to claim 1, wherein the weakening line is formed by leaving at least a liner on one side of the cardboard. 3. The corrugated cardboard box for a photosensitive material according to claim 1, wherein the tearing start end of the weakening line projects from an edge of the corrugated cardboard box. 4. The cardboard box for photosensitive material according to claim 1, wherein a single-edge zipper is provided on both sides of the cardboard box orthogonal to the line of weakness. 5. The corrugated cardboard box for photosensitive material according to claim 1, wherein a notch is provided at an edge portion connected to a connection margin when the corrugated cardboard box is joined. 6. The photosensitive material is a roll-shaped photosensitive material sealed and wrapped in a moisture-proof light-shielding packaging bag, and is held in the axial direction of the roll by bending of a top surface of a cardboard box. 6. The cardboard box for a photosensitive material according to any one of items 1 to 5. 7. The moisture permeability (JIS) of the moisture-proof light-shielding packaging bag.
Z 0208, condition B, measured at a temperature of 40 ± 0.5 ° C. and a relative humidity of 90 ± 2%) was 10 g / (24 hours.
m ² ) or less, wherein the innermost layer is a polyolefin resin layer. 8. The roll-shaped photosensitive material has a winding diameter of 150.
The cardboard box for a photosensitive material according to claim 6, wherein the thickness is not less than mm. 9. Liner basis weight (JIS P 8124)
Is 230 to 350 g / m ² , and the core basis weight (JIS P8
124) is 125 to 250 g / m ² , and a double-faced corrugated cardboard sheet is prepared by using an adhesive whose main component is starch. The double-faced corrugated cardboard sheet is formed into a square shape by a slitter / scorer and a cut-off device. The printed sheet is printed on the sheet surface formed in a desired shape, and the printed sheet is punched into an unfolding die of a box. A method for producing a corrugated cardboard box for photosensitive material, comprising forming two or more continuous lines of weakness that do not penetrate corrugated cardboard, wrapping the photosensitive material in a moisture-proof light-shielding packaging bag, and producing a punched sheet.