JP2683938B2 - Photosensitive material package - Google Patents

Description

The present invention relates to a roll-shaped photosensitive material package, and more particularly to a photosensitive material bulk roll (hereinafter referred to as bulk roll) package.

[Conventional technology]

Japanese Utility Model Publication No. 56-12235 discloses a wrapping paper made of a water resistant sheet and a package of a carbonless bulk roll using a disc-shaped flange.

Conventionally, in order to shield a bulk roll of photographic film or photographic paper from light, as shown in FIG. 7, the peripheral surface of the bulk roll 2 wound around the winding core 1 is covered with a light-shielding film 3 and the bulk The side surface of the roll 2 was covered with ear pads 4b.

That is, as shown in FIG. 8, a ball (not shown) is wound around the peripheral surface of the bulk roll 2, and a moisture-proof film composed of two laminated films bonded to the peripheral surface of the ball at a bonding portion 5 is formed. Wrap the laminated film 6 several times,
The side surface of the bulk roll 2 is covered with an inner ear pad 4a.

Then, after the light-shielding film 3 having the starting end fixed to the moisture-proof film 6 with the adhesive tape 7 is wound several times, the ending end is fixed with the adhesive tape 8 as shown in FIG.
The light-shielding film 3 protruding from the side surface is bent in the side direction to cover the outer side edge of the bulk roll 2.

Next, as shown in FIG. 7, after attaching the external ear pads 4b to the side surface of the bulk roll 2, the outer peripheral edge thereof is folded in the circumferential surface direction of the bulk roll 2 and fixed to the light shielding film 3 with the adhesive tape 9. At the same time, it is fixed to the core 1 with the adhesive tape 10.

[Problems to be solved by the invention]

In the above-mentioned conventional package, since the bulk roll is shielded from light by the light-shielding film that shields the peripheral surface and the ear pads that shield the side surfaces, the packaging work is time-consuming and expensive. Also, because adhesive tape is used to fix the ear pads to the light-shielding film, pressure is applied to the bulk roll when fixing with this adhesive tape, and pressure fogging occurs up to about 10th lap, so it is discarded. Was.

The present invention solves the above problems, the packaging work is simple,
Moreover, it is an object of the present invention to provide a photosensitive material bulk roll package in which pressure fog does not occur.

[Means for solving the problem]

The present invention has been made to achieve the above object,
That is, the photosensitive material bulk roll package of the present invention includes a core, a roll-shaped photosensitive material wound around the core, a peripheral surface and a side surface of the roll-shaped photosensitive material, and both ends. A light-shielding film fixed to the outer surface of the winding core by a length shorter than the length of the winding core.

The light-shielding film is for covering the bulk roll of the photosensitive material in a light-shielding and moisture-proof manner.

It is essential that the light-shielding property does not cause light fog if the light-sensitive material is packaged with a light-shielding film even if left in a white lamp for 30 minutes. Particularly preferably, light fog is not generated even when left for 1 day under a light of 1000 lux or more.

In addition, moisture resistance is measured by placing 10 g of calcium chloride in a 10 cm x 10 cm square sealed bag at 40 ° C and 90% RH (JIS Z-0208).
Water vapor permeability of 5 g / m ² · 24 hours or less, preferably 2 g / m ² · 24 hours or less, particularly preferably 1 g / m ² · 24 hours or less.

As long as the light-shielding film has the above-mentioned light-shielding property and moisture-proof property, its composition, layer structure, thickness, number of windings, and the like can be variously configured.

For example, when the light-shielding film is composed of a single layer, a film containing polyethylene resin, ethylene copolymer resin, etc., which is flexible and has a large physical strength, is preferable.

 Representative examples of the ethylene copolymer resin are shown below.

(1) Ethylene-vinyl acetate copolymer resin (2) Ethylene-propylene copolymer resin (3) Ethylene-1-butene copolymer resin (4) Ethylene-butadiene copolymer resin (5) Ethylene-vinyl chloride Copolymer resin (6) Ethylene-methyl methacrylate copolymer resin (7) Ethylene-methyl acrylate copolymer resin (8) Ethylene-ethyl acrylate copolymer resin (hereinafter referred to as EEA resin) (9) Ethylene-acrylonitrile copolymer resin (10) Ethylene-acrylic acid copolymer resin (11) Ionomer resin (resin obtained by crosslinking a copolymer of ethylene and unsaturated acid with a metal such as zinc) (12) Ethylene-α Olefin copolymer resin (L-LDPE
Resin) (13) Ethylene-propylene-butene-1 terpolymer resin (14) Modified polyolefin resin Among ethylene copolymer resins, film moldability and dispersibility of light-shielding substances and coloring substances are good, L-LDPE resin, EEA resin, and EVA resin, which are flexible and have excellent pinhole resistance, which have high impact drilling strength and tear strength, are preferable.

A light-shielding substance is added to the light-shielding film in order to secure the light-shielding property.

 Examples of the light-shielding substance used in the present invention are shown below.

(1) Inorganic compounds A. Oxides: silica, diatomaceous earth, alumina, titanium oxide,
Iron oxide, zinc oxide, magnesium oxide, antimony oxide, barium ferrite, strontium ferrite,
Beryllium oxide, pumice, pumice balloon, alumina fiber, etc. B. Hydroxide: Aluminum hydroxide, Magnesium hydroxide, Basic magnesium carbonate C. Carbonate: Calcium carbonate, magnesium carbonate, dolomite, dawsonite, etc. D. (Sub) sulfuric acid Salt: Calcium sulfate, barium sulfate, ammonium sulfate, calcium sulfite, etc. E. Silicate: Talc, clay, mica, asbestos, glass fiber, glass balloon, glass beads, calcium silicate, montmorillonite, bentonite, etc. F. Carbon… Carbon black, graphite, carbon fiber,
G. Others: iron powder, copper powder, lead powder, aluminum powder, molybdenum sulfide, polon fiber, silicon carbide fiber, brass fiber, potassium titanate, titanium nitride, lead zirconate titanate, etc.
Zinc borate, barium metaborate, calcium borate,
Sodium borate, aluminum powder, aluminum paste, talc, etc. (2) Organic compounds Wood powder (pine, oak, sawdust, etc.), shell fiber (almonds, peanuts, fir shells, etc.), colored cotton, jute, paper strips, Cellophane pieces, nylon fibers, polypropylene fibers, starch, gelatin, cowhide powder, aromatic polyamide fibers, etc. Among these light-shielding substances, an opaque inorganic compound is preferable, and in particular, it has large hiding power and heat resistance and light resistance. Light absorbing carbon black, titanium nitride and graphite, which are excellent and relatively inert materials, are preferred. The content of the light-shielding substance in the light-shielding film varies depending on the thickness of the light-shielding film and the type of resin, but is 0.01 to 20% by weight, preferably
It is 0.1 to 12% by weight.

If the light-shielding film as a whole satisfies the above-mentioned light-shielding property and moisture-proof property, it may have a single-wound structure or a few-wound structure, and its thickness and the like may be appropriately changed depending on the number of times of winding. be able to. For example, when winding 3 to 5 times, the thickness is 20 μm to 250 μm
Is preferred, especially 50 μm to 200 μm, most 70 μm to 150 μm
m is preferred.

The light-shielding film may be fixed to the winding core by any means capable of fixing it in a light-shielding manner. For example, a string (string), a rubber ring, an adhesive tape, or an adhesive is used.

As the core for the bulk roll, those conventionally used are used, but in order to withstand the weight of the bulk roll and prevent deformation and damage from occurring, its thickness is 5 mm or more, preferably 10 mm or more, and particularly preferably. It is 15 mm or more.

As the photosensitive material, a large and heavy roll-shaped photosensitive material wound around a core for a bulk roll is applied.

The photosensitive material bulk roll package as described above is preferably held in a suspended state so that the light-shielding film, that is, the peripheral surface of the bulk roll, does not directly contact the floor or the like.

[Action]

In the light-sensitive material bulk roll package of the present invention, the light-shielding film integrally covers the peripheral surface and the side surface of the roll-shaped light-sensitive material to secure light-shielding property and moisture-proof property.

〔Example〕

An embodiment of the photosensitive material bulk roll package according to the present invention will be described with reference to FIGS. 1 to 5.

FIG. 1 is a perspective view of one embodiment of a photosensitive material bulk roll package, FIG. 2 is a sectional view of the same as above, and FIGS. 3 to 5 are perspective views showing a manufacturing process of same.

In FIGS. 1 and 2, reference numeral 11 is a winding core, and a bulk roll 12 is wound around the winding core 11 as in the conventional case.

The ball 13 is wound around the peripheral surface of the bulk roll 12 several times, and the side end of the ball 13 is bent inward by approximately 90 degrees to cover the outer side edge of the bulk roll 13. The starting end of the ball 13 is fixed to the end of the bulk roll 12 with an adhesive tape (not shown), and the end is fixed to the ball 13 itself with an adhesive tape (vinyl chloride tape) 14.

A light-shielding film 16 having a starting end fixed to the ball 13 with an adhesive tape 15 is wound around the peripheral surface of the ball 13 several times, and both ends 17, 17 of which are rubber bands 18, 18 at the base end of the winding core 11. It is fixed to and the tip is wound with adhesive tape 19, 19.
Fixed to 11.

In order to manufacture the above-mentioned package, first, as shown in FIG. 3, the starting end of the ball 13 is fixed to the end of the bulk roll 12 with an adhesive tape (not shown), and then the ball 13 is wound several times. The side end is bent to cover the outer side edge of the bulk roll 12, and the end is fixed to the ball 13 itself with an adhesive tape 14.

Next, as shown in FIG. 4, the starting end of the light-shielding film 16 is fixed to the ball 13 with an adhesive tape 15 and then wound several times to form a cylindrical shape as shown in FIG. Then, the end portion 17 of the light-shielding film 16 that projects laterally from the bulk roll 12 is squeezed so as to be substantially in close contact with the side surface of the bulk roll 12 and the winding core 11, and then a rubber band 18 is provided on the base end side of the winding core 11. And the tip is fixed to the outer surface of the winding core 11 with an adhesive tape 19 with a length shorter than the length of the winding core.

And such a photosensitive material bulk roll package,
As shown in FIG. 6, the winding core 11 is engaged with a guide plate 21 provided in the wooden box 20 and held in a suspended state, and is transported in this packaged state.

Inventive Product I The winding core 11 has a diameter of 300 mm and a length of 1620 mm, and the bulk roll 12 has a diameter of 800 mm and a length of 1270 mm.

The ball 13 was made of unbleached kraft paper of 70 g / m ^{2 which} does not adversely affect the photographic properties, and was wound two times.

The light-shielding film 16 is a fatty acid amide 600PPM that does not adversely affect the photographic properties, and 3% by weight of furnace carbon black.
A 120 μm-thick film made of a low-density homopolyethylene resin having an MFR of 2.0 g / 10 min and a density of 0.922 g / m ³ was wound three times. In addition, a three-way heat-sealing bag was prepared by stacking three sheets of this film, and the measured value of water vapor permeability according to JIS Z-0208 was 1.04 g / m ² · 24 hours.

This packaging is 1/3 the packaging time compared to the conventional packaging.
It can be shortened, and the packaging material cost has been reduced by 70%. In addition, the pressure loss and wrinkles caused by the adhesive tape for fixing the ear pads do not occur, so the product loss is reduced to less than 1/10.

Further, pressure fog and winding tight wrinkles due to the adhesive tape for fixing the end of the light shielding film, and pressure fog at the joint portion of the moistureproof film do not occur.

Inventive product II The core 11 and the bulk roll 12 were the same as those of the inventive product I, and the ball 13 was not used.

The light-shielding film 16 is a fatty acid amide 600PPM that does not adversely affect the photographic properties, 3% by weight of furnace carbon black,
Non-ionic antistatic agent (Kao Electro Stripper
TS-3) Containing 0.15% by weight, MFR 2.0g / 10 minutes, density 0.92
120 μm thick made of 2 g / cm ³ low density polyethylene resin
The film was used for 5 turns. In addition, by stacking 5 sheets of this film, a four-sided heat-sealed bag was prepared, and JI
The measured value of water vapor transmission rate according to SZ-0208 was 0.5 g / m ² · 24 hours or less.

The packaging time can be shortened as compared with the product I of the present invention,
Moreover, the packaging materials were saved. In addition, product loss was reduced to less than 1/10.

Inventive product III The core 11 and the bulk roll 12 are the same as those of the inventive product I.

The ball 13 has a thickness of 50 μm, which does not adversely affect the photographic property.
The foamed polyethylene sheet of No. 1 was used and wound twice.

The light-shielding film 16 is a fatty acid amide 500PPM that does not adversely affect the photographic properties, 3% by weight of furnace carbon black,
MFR is 1.1 g / 10 minutes, density is 0.954 g / cm ³ homopolyethylene resin 20% by weight, nonionic antistatic agent (Kao Electrostripper TS-3) 0.20% by weight, MFR is 2.1 g / 10 minutes,
A polyolefin resin film having a thickness of 80 μm and made of 76.65% by weight of an ethylene / 4-methylpentene-1 copolymer resin having a density of 0.920 g / cm ³ was used and wound four times.

In addition, on the side surface of the bulk roll 12, the same inner ear pad as the conventional one was provided for the purpose of side surface protection.

This package obtained substantially the same effects as the product I of the present invention in packaging time, packaging material and product loss.

Further, as compared with the product I of the present invention, the moisture resistance and physical strength were improved, and the occurrence of static was reduced.

〔The invention's effect〕

INDUSTRIAL APPLICABILITY According to the present invention, a large-sized and heavy roll-shaped photosensitive material called a bulk roll can be light-tightly packaged with a single light-shielding film. It is possible to reduce the loss of the photosensitive material without causing pressure fog and wrinkling due to the adhesive tape or the like necessary for fixing the two members.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a photosensitive material bulk roll package according to the present invention, FIG. 2 is a sectional view of the same as above, and FIGS.
FIG. 6 is a perspective view showing a manufacturing process, FIG. 6 is a partially cutaway perspective view showing a final packaging state during transportation, FIG. 7 is a perspective view of a conventional example, and FIGS. It is a perspective view which shows a manufacturing process. 11 …… winding core, 12 …… photosensitive material bulk roll, 13 …… our ball, 16 …… light-shielding film, 18 …… rubber band, 19 …… adhesive tape

 ─────────────────────────────────────────────────── ───Continued from the front page (56) References JP-A-2-72347 (JP, A) SAIKAI Sho 61-140352 (JP, U) SUNKOKAI 1-42096 (JP, Y2) US Patent 4455076 (US , A) European publication 181417 (EP, A1) European publication 230057 (EP, A1) European publication 350093 (EP, A1)

Claims (1)

(57) [Claims] 1. A core, a roll-shaped photosensitive material wound around the core, a peripheral surface and a side surface of the roll-shaped photosensitive material, and both ends wound on an outer surface of the core. A light-sensitive material bulk roll package, comprising: a light-shielding film fixed to a length shorter than a core length.