JP3254327B2 - Photosensitive material package - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll-shaped photosensitive material package for storing unexposed photosensitive material.

[0002]

2. Description of the Related Art As shown in FIG. 35, a conventional photosensitive material packaging form is generally such that a roll-shaped photosensitive material 111 such as unexposed photographic paper having a large width is wound around a hollow cylindrical core 113. In order to maintain the photographic performance, which is a commercial value,
After being wrapped with the light-shielding sheet 115 having a moisture-proof function, the core 119 of the side plate 117 having the function of maintaining photographic performance and protecting the product during the distribution process is fitted to both ends of the core 113 to be supported in the air. And packed in a box 121 of cardboard or the like and shipped to the user. However, in the distribution process, the cardboard boxes 12
If 1 is dropped, the load applied to the core 119 of the side plate 117 is large because the photosensitive material 111 is heavy.

[0003]

The conventional side plate 117 supporting both ends of the hollow cylindrical core 113 around which the photosensitive material 111 is wound uses a low-cost foam polystyrene or the like as a material. However, the expanded polystyrene is weak in strength, so that when the cardboard box 121 containing the photosensitive material 111 is dropped, the core 119 is broken and the core 113 cannot be supported. As a result, a load is also applied to the core 113 to deform the core 113 or the photosensitive material 11
1 also loses photographic performance, which is the commercial value it should have. Further, in order to increase the strength of the side plate 117, foamed polyethylene or foamed polypropylene can be used as a material, but such a material is more expensive than foamed polystyrene. Furthermore, since foamed polyethylene, foamed polypropylene, and the like are too viscous, the core 119 is pulled downward by the inertial force of the photosensitive material 111 when dropped, and is elastically deformed. As a result, the photosensitive material 111 is stored in the cardboard box 12.
1 is pressed into contact with the bottom of the photosensitive material 1 (bottoming phenomenon), and the photosensitive material 1
Pressure fog occurs at 11 and a problem occurs in photographic performance.

A side plate 117 produced by injection molding using polystyrene, polypropylene, high-density polyethylene, low-density polyethylene, or the like as a material has high strength, and the core 119 can be held in a supported state without being damaged by dropping or the like. . However, since the side plate 117 made of these materials has high rigidity and is hard and has almost no cushioning function, the impact of the drop is transmitted directly to the photosensitive material 111, and the photosensitive material 11
1 is damaged by edge damage, pressure fog, etc., and the commercial value is lost. Also, the cardboard box 121
The contact portion with the side plate 117 may be broken.
Further, if a cushioning member is provided between the roll-shaped photosensitive material 111 and the side plate 117 in order to avoid damage such as edge damage and pressure fog due to dropping of the roll-shaped photosensitive material 111, the manufacturing cost increases. Further, there is a disadvantage that the number of processing steps is increased by one.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and can be manufactured at a low cost, can securely support a roll-shaped photosensitive material in the air, and has a sufficient shock absorbing performance against impact. An object of the present invention is to provide a photosensitive material package.

[0006]

SUMMARY OF THE INVENTION The object of the present invention is to form a pair of foamed moldings on both ends of the core by winding a photosensitive material around a hollow cylindrical core in a roll shape and covering with a light shielding sheet. The columnar cores provided with the side plates are fitted to each other, and these are housed in a light-shielding dark box made of corrugated cardboard.
In a light- sensitive material package, wherein the light-sensitive material is supported in the air in the light-shielding dark box , the side plate includes the light-sensitive material.
It has a receiving portion for protecting the outer peripheral surface of a feature to form a <br/> clearance 0~15mm between the receiving surface of the peripheral surface and the receiving portion of the photosensitive material wound into a roll This can be achieved by the photosensitive material package described above.

[0007] The clearance is formed by setting the inner diameter of the receiving surface larger than the outer diameter of the roll-shaped photosensitive material, and is 0 mm to 15 mm, preferably 0.2 mm.
It can be effectively achieved by setting it to 10 to 10 mm, more preferably 0.3 to 7 mm. Here, the clearance of 0 mm means that no pressure is applied to the photosensitive material even when the photosensitive material is in contact with the receiving surface.

[0008]

[0009]

[0010]

[0011]

[0012] It is another object of the present invention to provide the above-mentioned object, wherein the side plate is volatile.
Rubber-containing expanded polystyrene foamed with a foaming agent
With a photosensitive material package characterized by being more molded
Can be achieved.

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

In the rolled photosensitive material package according to the present invention, the rolled photosensitive material is formed on the outer peripheral surface of the rolled photosensitive material and the outer periphery of the core portion in a state where the core of the rolled photosensitive material is inserted into the core portion. A clearance is formed between the receiving surface and the receiving surface. This prevents the impact deformation at the time of the drop from directly propagating to the roll-shaped photosensitive material, and also reduces the propagation of the impact force to the core, thereby preventing damage to the core and reliably supporting the core. State can be maintained.

Further, since the hollow portion for thinning the core portion is formed, the volatile foaming agent can be prevented from remaining in the side plate while securing the buffer function of the side plate.

Further, since a hole for absorbing shock is provided at the corner of the side plate, the inward deformation of the corner due to the impact force at the time of falling is absorbed in the space of the hole, and the roll is formed. Reduces the impact of impact on photosensitive material.

It is preferable that the foamed material is expanded polystyrene foamed with a volatile foaming agent.
It can be manufactured at lower cost than using foamed polyethylene or foamed polypropylene.

It is particularly preferable that the foam material is a rubber-containing expanded polystyrene foamed with a volatile foaming agent, so that a suitable elastic deformation capacity against impact force can be obtained and a side plate which is not easily damaged can be obtained. it can.

Further, by performing vacuum cooling after water cooling during the cooling step in the foaming material forming step, excess water on the side plate surface is removed, and the photographic performance of the photosensitive material is impaired due to evaporation of residual water after forming. Can be prevented.

Further, by providing an outlet at the end of the side plate for drawing out the stored roll-shaped photosensitive material, the side plates are provided at both ends of a hollow cylindrical core in which the photosensitive material is wound in a roll shape. The photosensitive material can be pulled out while being inserted.

Further, by providing a notch for identifying the direction on the outer end face of the side plate, the direction of the side plate in a dark room can be easily recognized, and the working efficiency can be improved.

Further, since the material indication mark is provided on the outer end surface of the side plate, the material name and the recycled product can be easily recognized at the time of use.

[0028]

An embodiment of the present invention will be described below with reference to the accompanying drawings. Specifically, an example of packaging a roll-shaped photosensitive material having a width of 30 cm to 150 cm, a winding length of 20 m to 150 m, and a weight of 2 kg to 50 kg will be described. FIG. 1 is an exploded perspective view of a package showing a first embodiment of the present invention, FIG. 2 is a perspective view showing an inner side of a side plate, FIG. 3 is a perspective view showing an outer side of a side plate, and FIG. FIG. 5 is a plan view of an outer surface of the side plate, and FIG. 6 is a sectional view taken along line AA in FIG.

As shown in FIG. 1, the package 1 of the present embodiment
A light-shielding film 11 is wound around the roll-shaped photosensitive material wound around a hollow cylindrical core two to three times, and a side plate 5 with a draw-out opening 6 is provided at both ends of the photosensitive material body fixed with an adhesive tape 12. And then housed in a light-shielding box 16 for photosensitive material made of double-faced cardboard. With this configuration, the roll-shaped photosensitive material is held in the light-shielding box 16, and the impact and the like are particularly absorbed by the side plate 5 fitted to the axial end of the roll-shaped photosensitive material. Therefore, the roll-shaped photosensitive material is reliably protected by the light-shielding and buffering characteristics.

As shown in FIGS. 2 and 4, the side plate 5 includes a substantially square substrate 5a, a columnar core 7 provided at the center of the substrate 5a and fitted to the end of the core, and a substrate 5a. The outer peripheral edge of the outer peripheral edge 5a comprises a receiving portion 8 for protection thicker than the substrate 5a, and a photosensitive material outlet 6 formed on one side of the outer peripheral edge. The receiving portion 8 has a U-shaped receiving surface 8d on the inner surface,
An elongated hole 8b for absorbing shock is formed at a corner on the inner surface side, and a cutout 8a for identifying the orientation in a dark room is formed on a side edge facing the outlet 6.

As shown in FIG. 3 and FIG.
A lightening hole 9 for reducing the thickness of the core portion 7 is formed on the outer surface of the side plate 5. By forming the lightening hole 9, the average thickness of the side plate 5 can be reduced. As a result, the foaming material can be saved, and the volatile foaming agent
So that it does not remain inside.

By forming the hollow 9, the side plate 5 has a thickness of 3 mm to 60 mm, preferably 4 mm to 60 mm.
It is set to be within 55 mm, more preferably within 5 mm to 50 mm.

A hole 8c of the same shape is formed at the same position on the outer surface facing the hole 8b. Hole 8
The length of b, 8c is 15 mm to 35 mm, preferably 2 mm.
0 mm to 30 mm, more preferably 22 mm to 27 m
m, and the width of the holes 8b and 8c is 3 mm to 10 m.
m, preferably 4 mm to 8 mm, more preferably 5 mm
６6 mm.

Further, a material indicating mark 10 indicating that the side plate 5 is made of polystyrene which can be reused as waste is engraved on the outer surface. The material indication mark 10 shown in FIGS. 3 and 5 is a US SPI (Society of Plas
tic Industry) is a polystyrene mark based on the code. Items with this mark can be reused as PSP trays, fish boxes, tableware and other miscellaneous goods.

As shown in FIG. 4 and FIG.
When is fitted to the side end of the roll core 3 of the roll-shaped photosensitive material 4, a clearance m is formed between the outer peripheral surface of the roll-shaped photosensitive material 4 and the receiving surface 8d of the receiving portion 8. That is, the core 3
When the core portions 7 are fitted to both side ends of the roll-shaped photosensitive material 4, the side end portions of the roll-shaped photosensitive material 4 come into contact with the substrate 5a. At this time, since the radius of curvature of the receiving surface 8d of the receiving portion 8 is set to be larger than the outer diameter of the roll-shaped photosensitive material 4, the clearance m is formed. Therefore, since the clearance m is formed, when the roll-shaped photosensitive material 4 on which the side plate 5 is fitted falls, even if the photosensitive material 4 moves relative to the side plate 5 in the radial direction due to inertial force. The core 7 is not damaged. That is, even if the roll-shaped photosensitive material 4 moves in the radial direction, the peripheral surface of the photosensitive material contacts the receiving surface 8d in a region where the core 7 is not damaged, so that the core 7 is not excessively deformed, and the base and the like are not deformed. No damage.

The size of the clearance m is 0 to 15
mm, more preferably 0.2 mm to 10 m
m, particularly preferably 0.3 mm to 7 mm.

The side plate 5 is made of expanded polystyrene which is a volatile foam material. Rubber is added to the expanded polystyrene in order to have an appropriate elasticity and physical strength. The amount of the rubber to be added should be 1 depending on the balance between physical strength and photographic properties and cost.
% To 20% by weight, preferably 2% to 18% by weight, particularly preferably 3% to 15% by weight.

Next, a first comparative example of the side plate will be described with reference to FIGS. FIG. 7 is a perspective view showing the inner side of the side plate, and FIG.
7 is a perspective view showing the outer surface side in FIG. 7, and FIG. 9 is a sectional view taken along line BB in FIG. As shown in FIG.
The core 7 is formed at the center of the substantially square substrate 15a, and the elongated holes 8b are formed at the four corners. As shown in FIG. 8, a lightening hole 9 for lightening the inside of the core portion 7 is formed on the back surface side, and the same shape of a hole 8c is formed at four corners facing the hole 8b. I have. 1st ratio
The side plate 15 of the comparative example is different from the side plate 5 of the first embodiment, and
And the outlet 6 is not provided, the configuration is simplified, and the degree of freedom in use is increased. Also, the first
The side plate 15 of the comparative example has a configuration in which the receiving portion 8 in the first embodiment is omitted, but since the punched holes 8b are formed at the four corners on the inner and outer surfaces, the shock absorbing ability is equivalent to that of the first embodiment. .

As shown in FIG. 9, when the core 7 is fitted to the side end of the core 3 of the side plate 15, the side end of the roll-shaped photosensitive material 4 is supported in contact with the substrate 15a. . Substrate 15a
Is set to be larger than the outer diameter of the roll-shaped photosensitive material 4, the gap between the inner wall surface of the light-shielding box and the outer peripheral surface of the roll-shaped photosensitive material 4 is stored in the light-shielding box 16. Is formed with voids. Therefore, an aerial state can be maintained. In particular, the core portion 7 can be elastically deformed by forming the lightening hole 9 and has a shock absorbing function.

Next, a second comparative example of the side plate will be described with reference to FIGS. 10 is a perspective view showing the inner surface side of the side plate of the second comparative example , FIG. 11 is a perspective view showing the outer surface side, and FIG. 12 is a cross-sectional view taken along line CC in FIG. As shown in FIG. 10, the side plate 15A has a core 7a formed at the center on the inner surface side of a substantially square substrate 15b. As shown in FIG. 11, a lightening hole 9a is formed on the outer surface side to reduce the thickness of the core portion 7a. However, the receiving portion 8 and the hole 8c as in the first embodiment and the first comparative example are not formed.

The operation when the core portion 7a is fitted to the side end portion of the core 3 as shown in FIG. 12 is substantially the same as that of the first comparative example. Is not formed, the impact force is absorbed by the entire substrate 15b, and the load applied to the core 7a is large.

Next, a description will be given of an assembling structure of a photosensitive material package wound in a roll. As shown in FIG. 13, first, the base end 4 a of the long photosensitive material 4 is wound around the core 3 and adhered with the adhesive tape 2. As shown in the cross section in FIG. 15, the core 3 is a polyethylene film 3a having a thickness of 15 μm from the outside, bleached paper 3b having a basis weight of 15 g / m ² , and a basis weight 3
The unbleached kraft paper 3c of 80 g / m ² consists of 9 layers. The adhesive tape 2 has a polyethylene film 2a having a thickness of 25 μm and a thickness of 30 μm as shown in the cross section in FIG.
m of a pressure-sensitive adhesive layer 2b and a release paper 2c.
In the case of a roll-shaped photosensitive material in which pressure fogging is likely to occur at the winding end, a material in which a foamed polyethylene sheet having a thickness of 1 mm is laminated on the outside of a polyethylene film 3a having a thickness of 15 μm in the core 3 is used.

Next, after the roll-shaped photosensitive material 4 is wound on the core 3 by a predetermined length as shown in FIG. 14, a light-shielding film 11 is placed on the roll-shaped photosensitive material 4 as shown in FIG. ~
Wind three turns, preferably 2.1 to 2.5 turns. This light-shielding film 11 is a biaxially stretched polypropylene film containing carbon black. As shown in FIG.
After wrapping the roll-shaped photosensitive material 4 with the light-shielding film 11, both ends of the light-shielding film 11 are folded into the core 3 and fixed with the adhesive tape 12. This adhesive tape 12 is composed of a cellophane film 13 having a thickness of 38 μm and a rubber-based pressure-sensitive adhesive layer 14 as shown in a cross section in FIG.

The light-shielding film 11 made of a biaxially oriented polypropylene film containing carbon black is
It has a thickness of 60 μm and has a carbon black concentration of 4.8% by weight and a moisture permeability (JIS K-7129) of 2.
0 to 6.0 g / m ² / day, surface resistivity (JIS
K-6723) is 1.0 × at 23 ° C. and 63% RH.
11 ¹¹ Ω / □ or less, vertical breaking strength (JIS K-712
7) is 10 to 15 kg / mm ² , the transverse breaking strength (JIS
K-7127) is 22 to 32 kg / mm ² , the longitudinal elongation at break (JIS K-7127) is 130 to 200%, the lateral elongation at break (JIS K-7127) is 30 to 60%,
Vertical Young's modulus (JIS K-7127) is 180-28
0 kg / mm ² , lateral Young's modulus (JIS K-712
7) has a physical property value of 400 to 500 kg / mm ² .

Next, as shown in FIG. 20, two side plates 5 according to the present invention are prepared, and the core 7 is fitted into the end 3a of the core, and as shown in FIG. Shading box for materials 1
6, the rolled photosensitive material package 1 is formed. Further, a light-shielding box 17 for a light-sensitive material for a lid is prepared as shown in FIG.
Is covered. Then, after the light-shielding box 16 for the light-sensitive material for the body covered with the light-shielding box 17 for the light-sensitive material for the cover is turned over, the light-shielding box 17 for the light-sensitive material for the cover is changed to the light-shielding box 16 for the light-sensitive material for the body with cloth adhesive tape 18. Fix it. Light shielding box 17 for lid photosensitive material
In this case, a punching hole 17a for handling may be formed at a position opposite to the hole, so that the light-shielding box 16 for personal photosensitive material can be easily pulled out.

The light-shielding boxes 16 and 1 for the photosensitive material for the body and the lid
7 is liner K-280 g / m ² , core SCP-12
It is formed of double-faced cardboard using E steps of 5 g / m ² . Light-shielding boxes 16 and 17 for photosensitive material for body and lid
As shown in FIG. 23 and FIG. 24, the sheet cut by the punching die is provided by Saiden Chemical Co., Ltd.
153 or Konishi Co., Ltd. CF-530 and CF-6
Adhesive box is made using 71. Then, a light-shielding tape 19 is attached to the corner portion to secure the light-shielding function.

As shown in FIG. 25, the light-shielding tape 19 comprises a medium-to-low-pressure polyethylene film 20 containing 6% of carbon black and having a thickness of 50 μm, an acrylic pressure-sensitive adhesive layer 21, and a separator 22.

Thereafter, as shown in FIG. 26, the light-shielding boxes 16 and 17 for the photosensitive material for the body and the lid are turned over again, and then a label 23 indicating the kind, size, face type and the like is attached.
As shown in a cross section in FIG. 27, the label 23 is made of a high quality paper 24 having a basis weight of 84 g / m ² and a pressure-sensitive adhesive layer 25.
And a separator 26.

Next, a light-shielding box 1 for photosensitive material for body and lid
6, 17 are liner K-280g as shown in FIG.
/ M ² , and a core SCP-125 g / m ² , which is stored in a cardboard box 27 using an AB stage. Then, as shown in FIG. 29, Nitto Denko Corporation's PP tape 3201DB
The corrugated cardboard is sealed with a sealing tape 28, and a 15.5 × 1000PP band 29 manufactured by Showa Denko KK is applied and distributed. With the above specifications, actually 23 ± 3 ℃, 6
The product was packaged under a temperature and humidity condition of 0 ± 5% RH and a transport test was carried out. As a result, both the roll-shaped photosensitive material and the wrapping material had no problem and good transport results could be obtained.

Next, a modified example of the above assembly structure
explain. The core shown in FIG. 30 was used as the core.
Can be The core 32 shown in FIG.
360 g / m^Two2 layers of bleached paper 34 with a basis weight of 380 g /
m ^Two2 layers of unbleached kraft paper 35, adhesive layer 36, tsubo
30g / m^TwoTwist base paper 37, 13μm thick poly
Ethylene film layer 38, aluminum foil 39, thickness 1
3 μm polyethylene film layer 38 and basis weight 30 g /
m^TwoAnd the twist base paper 37. Also glued
As shown in the cross section in FIG.
25 μm polyester film 40, 25 μm thick
Use of one composed of a rubber-based adhesive layer 41
Can be.

The light-shielding film 11 has a thickness of 8
A carbon black-containing polyethylene film having a thickness of 0 μm can be used. This light-shielding film 11 is made of a transparent polyethylene resin (DF
D-0111) 92.5% by weight, carbon black 4
After blending 7.5% by weight of a black polyethylene resin containing 0% by weight, an inflation-molded black polyethylene film having a carbon black concentration of 3% by weight is formed.

In the light-shielding box 17 for the light-sensitive material for the lid, the white liner B was 300 g / m ² ,
What was formed by double-faced corrugated cardboard using E-stage of CP-125 g / m ² can be used.

Next, the foam molding of the side plate will be described. <Foam resin> The foam material forming the side plate is rubber-containing foam polystyrene to which rubber and a volatile foaming agent are added,
The molded body is composed of rubber-containing polystyrene and a volatile foaming gas. Specifically, Sekisui Plastics Co., Ltd.
PN beads (high-impact polystyrene foam resin) are used. As a foaming agent comprising a volatile foaming gas,
Aliphatic hydrocarbons such as propane, butane, isobutane, pentane, isopentane and hexane; fluorinated hydrocarbons such as trichloromonofluoromethane, dichlorotetrafluoroethane, dichloromonofluoromethane and trichlorotrifluoroethane; methanol and ethanol Alcohol or a mixture thereof can be used.

The amount of the rubber added to the foamed material is from 1% by weight to 20% by weight, preferably from 2% by weight to 18%, based on the balance between securing physical strength, adverse effects on photographic properties and cost.
%, More preferably 3% to 15% by weight.
By including the rubber in the expanded polystyrene, it is possible to mold at a high expansion ratio of about 50 times. On the other hand, when foamed polystyrene containing no rubber is used, foam molding must be performed at a low magnification of about 10 times. Therefore, by using rubber-containing expanded polystyrene as a foam molding material, foam molding can be performed at a high magnification of about 50 times, so that a side plate can be molded with less material than in the related art.

<Foam Forming Step> As shown in FIG. 32, the foam forming step includes three steps of preliminary foaming, aging, and molding. In the prefoaming step 50, the polystyrene particles are steam-heated in a foaming tank by prefoaming to determine the expansion ratio, and a low-expansion (5 to 30 times) batch type prefoaming machine is used.

The expansion ratio is 10 to 50 times, preferably 1 in consideration of the weight of the packaged product and the characteristics of the polystyrene particles.
5 to 40 times, more preferably 20 to 30 times, and finally 25 times. That is, when the expansion ratio is 25 times or less (10 to 20 times), the elasticity of the polystyrene particles is lost, and when the expansion ratio is 25 times or more (30 to 40 times), the roll has elasticity but weighs about 2 kg to 50 kg. The photosensitive material cannot be supported, and the molded product is distorted.

In order to make 25 times the expanded polystyrene particles of the stable polystyrene particles, the internal volume of the expansion tank should be small (247 liters).
A certain amount of polystyrene raw material beads (9.9 k
g) Weigh and charge every time. Do not put this input at once,
First, 9 kg is put in, and the remaining 0.9 kg is put in the second time. During steam heating, the temperature inside the foaming tank is 85 ° C to 9 ° C.
The temperature is set to 0 ° C. and is not set to 80 ° C. or lower or 100 ° C. or higher. Steam pressure is 0.2kg / cm ² ~0.3k
g / cm ² and the cooling air pressure is 1 kg / cm ² .

Next, the aging step 51 is a step of stabilizing the gas in the pre-expanded expanded particles so as to be suitable for molding. The aging time is 8 hours to 48 hours at room temperature.

Next, the molding step 52 is for molding the raw material beads using a mold and a molding machine, and comprises a filling step 53, a heating step 54, a cooling step 55, and a release step 56. The molding machine used is, for example, an automatic molding machine VS-300 manufactured by Daisen Industries.

The foamed particles foamed at a predetermined magnification by the prefoaming machine are aged, then filled in a mold attached to a molding machine, and heated again with steam so that the space between the particles is filled. Next, it is foamed to form a foamed molded article having a predetermined shape.
First, prior to the filling step, air at a pressure of 6 kg / cm ² is applied for 2 to 3 seconds to blow off moisture from the mold surface, thereby ensuring filling efficiency.

In the filling step 53, the raw material is filled into the mold by air in a crack state in which a gap of 2 mm is opened by matching the molds. At the time of filling, it is a 6-cavity mold, and the filling air is 5 kg to keep the weight of the molded product uniform.
/ Cm ² and the length of the filling material hose is adjusted to prevent air interference in the mold. Then, after returning the raw material in the filling hose into the hopper, the mold is sealed, and the air in the chamber is discharged by a vacuum pump to reduce the pressure.

In the heating step 54, steam heating is performed from the moving side, then steam heating is performed from the fixed side, and then steam heating is performed from both sides in the mold that has been vacuumed by vacuum. To wear. The steam pressure at this time is 0.9
In ^{kg / cm 2 ~1.0kg / cm 2} , mold temperature 1
At 20 ° C., each of the above heatings is performed for 10 seconds.

In the cooling step 55, after cooling water is filled in a mold in a spray form from a spray nozzle and cooled, water remaining in a cooling pipe or a mold chamber is discharged by air to lower the residual pressure. It is. The cooling water temperature at this time is 16 ° C. to 18 ° C., and the mold temperature is kept at 60 ° C. to 70 ° C. by applying cooling water for 5 seconds to 10 seconds or more. And, by further vacuum-cooling the inside of the mold by vacuum, the evaporation of the moisture adhering to the molded product and the moisture remaining in the foamed material at the time of cooling is accelerated, and the remaining moisture is reduced,
The moisture content in the foamed material is 1% by weight or less, preferably 0.1% by weight.
The content should be 5% by weight or less.

In the release step 56, after opening the drain valve and returning the inside of the mold to the atmospheric pressure state, the mold is opened and the molded product is taken out. The minimum thickness of the side plate as this molded product is set so as to be formed of two foamed materials.

Next, the configuration of the foam molding machine will be described. FIG. 33 is a perspective view of the foam molding machine. Molding machine 61
Consists of a fixed-side master frame 63 and a moving-side master frame 65. On the inner surface of the fixed-side master frame 63, a female mold 67 shown in FIG.
The moving master frame 65 is provided with a male mold 69 shown in FIG. Fixed side master frame 6
3 is connected to a filling machine 71 for supplying a foam material into the molds 67 and 69. A raw material supply hose 73 and an air tube 75 are connected to the filling machine 71, and polystyrene particles as raw materials are supplied from the raw material supply hose 73 to the molds 67 and 6.
The steam for heating is supplied from the air tube 75 into the molds 67 and 69. For this purpose, the molds 67 and 69 are provided with a raw material supply port 77 and a water vapor supply port 79. The supplied steam is discharged from exhaust valves 81 provided on each of the master frames 63 and 65.

The moving side master frame 65 is provided with a pipe 83 for supplying cooling water for cooling the molded product after molding. Cooling water is supplied from the pipe 83 into the molds 67 and 69 through a cooling water supply port 79 formed in the male mold 69. The supplied cooling water is discharged from the drain valve 89. In addition, the air in the molds 67 and 69 is sucked from the air tube 75 of the filling machine 71 to create a vacuum,
Even if the cooling water adheres to or remains in the molded product, it can be sufficiently dewatered.

The fixed-side master frame 63 includes:
Eject pin 85 for extruding and releasing the molded product
Are provided in each of the female molds 67. The cooled molded product is simultaneously extruded by the four eject pins 85 through the eject pin holes 87 and released. The molding machine 61 shown in FIG. 33 has a four-cavity configuration in which four side plates 5 are molded at the same time, but the number of side plates 5 molded simultaneously by one molding machine 61 depends on each of the master frames 63 and 6.
Although it depends on the size of 5, 2 to 18 are preferable, and 2 to 8 is particularly preferable.

In order to evaluate the impact resistance of the side plate having the above structure,
The following test was conducted. <Drop test> Test 1 A paper core was 134 cm wide, 83.8 m long, and weighed 26.
kg of photosensitive material, with the emulsion side inward
After 2.2 wraps of the light-shielding sheet around the body, foam molding
The side plates are fitted to both ends of the rolled photosensitive material, and
The photosensitive material package was housed in a cardboard box. Side plate and
Is a polystyrene beads MB manufactured by Hitachi Chemical Co., Ltd.
L was expanded to 10 times, and the foam was manufactured by Daisen Industries Co., Ltd.
The following four types of samples are formed using a molding machine VS-300. Foam
Molded.

(Invention) With receiving surface / without hole (in the present invention) With receiving surface / without hole (conventional example) Without receiving surface / without hole

Each of the above samples The package with the height
Fall from 45cm with the bottom of the cardboard box facing downward
5 times for each side plate damage at that time
Was. The results are as follows. Test result Almost no damage Almost no damageCore breakage

As described above, the side plate of the embodiment of the present invention,
Indicates that there is almost no damage to the core, etc.
Was properly maintained in the air. Also rolled
Photosensitive materials also reduce product value without problems in photographic performance
It never happened. In contrast, conventional products Is the core loss
Scratches are severe, some parts of the core are completely damaged, and roll feeling
Rolled photosensitive material cannot maintain the airborne support of the optical material
However, there was a body landing on a cardboard box. This
As described above, the embodiment of the present invention is a very
Even if expensive materials are used, the roll-shaped photosensitive material can be
It can be supported in the middle, and has a sufficient cushioning effect against impact.

Test 2 A photosensitive material having a width of 127 cm and a length of 30.5 m was wound on a paper core.
Roll on the roll with the emulsion side inside.
After 2.2 turns of the photosensitive material, the side plate is
Attach to both ends, store in a cardboard box,
The body was constructed. Foam made by Hitachi Chemical Co., Ltd.
Expand polystyrene beads MBL with 10 times expansion ratio
Molded sample (The present invention) and police made by Mitsubishi Kasei Co., Ltd.
Using Tylene resin HT-91 (100% HI-PS)
Injection molded sample (Conventional example) were prepared. sample Is
It has a receiving surface and a hole.

The above sample With the height 55
from a height of 30 cm to a horizontal plane at an angle of 30 °
The corners downward and damage the side plate at that time
Were tested 5 times each. As a result, the embodiment of the present invention
Does not damage the core, etc.
He was in support of the air. Also, roll-shaped photosensitive material
Does not reduce the product value without any problem in terms of photographic performance.
won. In contrast, the conventional example Has no core damage
However, the edge of the roll-shaped photosensitive material was about 20
It is damaged around the circumference, and furthermore, pressure fog occurs and
As a result, the commercial value was significantly reduced.

Test 3 As a side plate, polystyrene foam resin PN beads containing impact resistant rubber manufactured by Sekisui Plastics Co., Ltd.
Even at 0 times, similar good results could be obtained.
As described above, by using the impact-resistant polystyrene beads as the material, foaming at a higher magnification can be performed than with the expanded polystyrene beads, and the side plate can be formed with a smaller amount of material, which is advantageous in cost. Further, in addition to the above-mentioned expanded polystyrene, good results could be obtained also with expanded polyethylene, expanded polypropylene, and a composite resin bead foam. In the above-described embodiment, the case where the package is used for a roll-shaped photographic paper having a large width has been described. However, the present invention can be applied to, for example, a photosensitive material for printing, a master paper for plate making, and the like. .

[0075]

According to the photosensitive material package of the present invention, a roll-shaped photosensitive material is provided around the core of a side plate having a core supporting both ends of a hollow cylindrical core wound with a roll-shaped photosensitive material. Is formed, so that even if the package is accidentally dropped during transportation or storage, the roll-shaped photosensitive material having an inertia force of drop is supported by the receiver, so that the core is The portion is not excessively deformed, and damage to the core portion can be prevented. In addition, since the roll-shaped photosensitive material is safely supported in the air because it is supported by the receiving portion, the roll-shaped photosensitive material does not come into contact with an outer box or the like. There is no.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a package showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an inner surface side of a side plate.

FIG. 3 is a perspective view showing an outer surface side of a side plate.

FIG. 4 is an inner side plan view of a side plate.

FIG. 5 is an outer side plan view of a side plate.

FIG. 6 is a sectional view taken along line AA in FIG. 4;

FIG. 7 is a perspective view of the inner side showing a first comparative example of the side plate.

FIG. 8 is a perspective view of an outer surface side showing a first comparative example of the side plate.

FIG. 9 is a sectional view taken along line BB in FIG. 7;

FIG. 10 is a perspective view of the inner side showing a second comparative example of the side plate.

FIG. 11 is a perspective view of an outer surface side showing a second comparative example of the side plate.

12 is a sectional view taken along the line CC in FIG.

FIG. 13 is a perspective view showing a state where a photosensitive material is wound around a core with a tape.

FIG. 14 is a perspective view showing a roll-shaped photosensitive material wound around a core.

FIG. 15 is a sectional view of a winding core.

FIG. 16 is a sectional view of an adhesive tape.

FIG. 17 is a perspective view showing a state where a light-shielding film is being wound around a roll-shaped photosensitive material.

FIG. 18 is a perspective view showing a state in which a light-shielding film is fixed to a roll-shaped photosensitive material with an adhesive tape.

FIG. 19 is a sectional view of an adhesive tape.

FIG. 20 is a perspective view showing a state where a side plate is fitted to a roll-shaped photosensitive material.

FIG. 21 is a perspective view showing a state in which a roll-shaped photosensitive material having a side plate fitted therein is stored in a personal light-shielding box.

FIG. 22 is a perspective view showing a state in which the roll-shaped photosensitive material stored in the personal light-shielding box is stored in the lid light-shielding box.

FIG. 23 is a development view of the personal shading box.

FIG. 24 is a development view of a light shielding box for a lid.

FIG. 25 is a sectional view of a light shielding tape.

FIG. 26 is a perspective view of a package showing a state where a label is attached.

FIG. 27 is a sectional view of a label.

FIG. 28 is a perspective view showing a state where the package is stored in a cardboard box.

FIG. 29 is a perspective view showing a state where the cardboard box is sealed with a tape and a band.

FIG. 30 is a sectional view of a modified example of the core.

FIG. 31 is a sectional view of a modification of the adhesive tape.

FIG. 32 is a block diagram illustrating a foam molding step.

FIG. 33 is a perspective view of a foam molding machine.

FIG. 34 is a perspective view of a mold.

FIG. 35 is an exploded perspective view of a conventional roll-shaped photosensitive material package.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Wrapping body 3 Core 4 Roll-shaped photosensitive material 5 Side plate (1st Example) 5a Substrate 6 Outlet 7, 7a Core part 8 Receiving part 8a Notch part 8b Inner side hole 8c Outer side hole 8d Receiving surface 9, 9a Lightening hole 10 Material indication mark 11 Light-shielding film 12 Adhesive tape 15 Side plate ( first comparative example ) 15a, 15b Substrate 15A Side plate ( second comparative example ) 16 Personal light-shielding box 17 Light-shielding box for lid 19 Light-shielding tape 23 Label 27 Corrugated cardboard box 28 Sealing tape 29 Band 32 Core 33 Rolled photosensitive material 42 Light-shielding film 61 Molding machine 63 Fixed side master frame 65 Moving side master frame 67 Female mold 68 Lightening hole forming core 69 Male mold 70 Inner surface Side hole forming core 71 Filling machine 73 Raw material supply hose 75 Air tube 77 Raw material supply port 79 Steam supply port and cooling Water supply port 81 exhaust valve 83 the pipe 85 ejecting pins 87 eject pin hole 89 drain valve

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-89009 (JP, A) JP-A-1-321240 (JP, A) Japanese Utility Model Showa 60-13386 (JP, U) Japanese Utility Model Showa 54- 149238 (JP, U) Japanese Utility Model 1-160438 (JP, U) Japanese Utility Model 3-71346 (JP, U) Japanese Utility Model 52-47089 (JP, U) Japanese Utility Model 60-27082 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) G03C 3/00 525

Claims (2)

(57) [Claims] 1. A photosensitive material is wound around a hollow cylindrical core in a roll form, and then covered with a light-shielding sheet.
A cylindrical core having a pair of foam-formed side plates is fitted to each other, and these are housed in a dark box made of cardboard light shielding.
Then, the photosensitive material is transferred to the light-shielding dark box by the side plate.
In the photosensitive material package supported in the air , the side plate has a receiving portion for protecting an outer peripheral surface of the photosensitive material.
The peripheral surface of the photosensitive material wound into a roll and the receiving portion of the receiving portion
Forming a clearance 0mm~15mm between the surface
Photosensitive material packaging body, characterized in that. 2. The side plate is foamed by a volatile foaming agent.
Molded from rubber-containing expanded polystyrene.
The light-sensitive material package according to claim 1, wherein: