JPS6265036A - Photographic film magazine - Google Patents

Abstract

PURPOSE:To prevent the injury of a photographic film without spoiling the light shielding performance thereof and to improve an operation for smooth drawing-out and unwinding by using yarn having a specific Young's modulus to a light shielding member stuck to the inlet and outlet part for the photographic film. CONSTITUTION:The piles of the light shielding member having the piles adhered to the inlet and outlet part of the photographic film are formed by using the yarn having 100-1,800kg/mm<2> Young's modulus. Such light shielding member is constituted of a base fabric and the piles. The base fabric is obtd. by plain wave and twill and the pile yarn in this case is used as warp. The piles are preferably formed of 45-60 pieces of filaments having 70-120 denier yarn size. The height of the pile yarn is preferably 1-2mm including the base fabric and the density thereof 20,000-50,000 pieces/cm<2>. The injury of the film is prevented without spoiling the light shielding performance by providing the light shielding member made of the pile yarn having such Young's modulus. The photographic film magazine which permits the easy operation for drawing out and unwinding of the film is obtd.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a photographic film magazine, and more specifically, a light shielding member having a pile attached to a film entrance/exit portion of a photographic film magazine is improved.
lvI to a photographic film magazine that improves the prevention and smoothness of film pull-out and rewind operations.

[Background of the Invention] In a photographic film magazine, a light-shielding FA material is usually attached to the film entrance/exit portion to prevent light from entering the inside of the magazine body from the film entrance/exit portion.

This light-shielding member must not only prevent the film from being exposed to light as a light-shielding member, but also prevent damage to the film when drawing out and rewinding the film, as well as smoothing out and rewinding the film. ,
A flexible material such as pile fabric is used.

On the other hand, recent 9TO films are becoming more sensitive to RFI and have higher quality, and along with this, there is a demand for light-shielding members with improved light-shielding performance, which is the basic performance of the light-shielding members used. has been done.

In contrast, conventional methods for improving the light-shielding performance of light-shielding members include increasing the pile density of the pile fabric used in the light-shielding member, and reducing the B:JR of the film entrance and exit portion of photographic film magazines. By W
(I'm trying to make a decision.

However, if the bullet strength t1 of the yarn used to increase the pile density is low, the pile is likely to collapse in the IJ and film magazine manufacturing process customers, thereby reducing the light shielding effect. In addition, when the elasticity is high and the pile density is human, there is a problem that (≧) is likely to be formed on the film surface at the film drawer and rewind opening.

In general, when increasing the pile density of pile fabrics, increasing the number of piles uses more pile I than before, which inevitably increases costs such as original I4 fi costs and additional costs. Also, the occurrence of pile falling could not be suppressed. This pile fall occurs during the photographic film magazine manufacturing process when the pile falls off and adheres to the inside of the magazine, and when it is re-OJ'd onto the film, it causes a film accident (activated areas become white). Furthermore, even after the film magazine has been commercialized, a similar accident will occur if the pile falls off and adheres to the film surface when the film is pulled out or rewound.

Furthermore, by increasing the pile density, 11? Since the number of U-piles increases, there are disadvantages in that the amount of work required when pulling out and rewinding the film becomes large, and that static electricity is more likely to be generated.

In the method of reducing the gap between the film entrance and exit portion, the load of the film drawer and rewinder increases, and furthermore, accidents such as damage to the film surface are likely to occur.

The inventors of the present invention have conducted intensive studies on light-shielding members, and found that the A7-ring skewer of the pile yarn of the pile fabric used in the light-shielding member prevents damage to the film when the film is pulled out and returned by 5 g, and facilitates smooth film withdrawal and rewinding operations. The present invention has been made based on the discovery that there is a relationship between

[Object of the Invention] An object of the present invention is to provide a photographic film magazine with a light-shielding member that prevents damage to the film without impairing light-shielding performance and improves the smoothness of film draw-out and rewind operations. .

The above-mentioned object of the present invention is to provide a photographic film magazine in which a pile is attached to a right-handed light-transmitting part (number is attached to a photographic film entrance/exit part), and the pile of the light-shielding member has a Young's modulus of 100 to 1. ，
9 formed from 800 (k(1/a+a+)) threads
Achieved by Oku Film Magazine.

[Specific Structure of the Invention] In the present invention, the Young's modulus of the pile yarn, which represents the bending flexibility of the yarn, is the composite fl! Information Handbook (Asaji Prison Co., Ltd.) 5
This is a constant measured by the method described on page 20.

mJ et al. drew a strength and elongation curve using a strength and elongation tester, and determined the Young's modulus using the following formula. The number of tests was 10, and the average value is shown.

However, elastic strength and elastic ↑1 elongation take the maximum value of ΔW - T (W is load, 2 is elongation) in the strength and elongation curve. Also, the cross-sectional area is not expressed as τ) from the denier and specific gravity.

In the present invention, it is necessary that the pile yarn noyank rate defined by the above formula is 100 to 1,800 (kg/ms), but preferably 200 to 1,500 (kg/ms).
g/zenho), more preferably 300 to +, 1
0100 (71m2).

A pile yarn having the above Young's modulus (hereinafter referred to as the pile yarn of the present invention) can achieve the effects of the present invention, but one pile yarn of the present invention has a yarn thickness of 50 denier to 150 denier. It is preferable that the yarn has a thickness of 70 to 1207' denier and is formed of 45 to 60 filaments.

In the pile yarn of the present invention, if the Young's modulus is within the range of the present invention, the effects of the present invention are achieved, but physical properties of the pile yarn other than the A7 Young's modulus include compressive elasticity, elasticity, and coefficient of friction. It will be done.

Among these physical properties, compression elasticity and elongation elasticity are important as characteristic values that regulate pile collapse, but when using a pile fabric that has 14 ranges of these characteristic values, Less effective in preventing scratches.

In addition, the coefficient of friction affects the film draw-out and rewind operations, but this physical property value is affected by the pile density and the noise of the film draw-out opening, so it can be adjusted even if the friction coefficient of the pile fabric is unfavorable. is a possible physical property.

The fiber material for the pile yarn of the present invention used in the photographic film magazine of the present invention is not limited to the material and can be any material that satisfies the Young's modulus of the present invention, such as nylon 6°6. polyamides such as polyamides, polyesters such as polyethylene terephthalate, polyolefins such as polyethylene, polyvinyl alcohols, polyvinyl chloride, polyvinyl chloride, polyacrylonitrile, polycyanide vinylidene, polyfluoroethylene, polyurethane. Synthetic fibers such as silk, cotton, wool, cellulose type, cellulose ester type natural fibers, fibers made from one or a combination of two or more selected from regeneration range 1 (rayon, acetate, etc.) It will be done. Preferred among these fiber materials are polyamides such as nylon 6 and nylon 6°6, polyesters such as polyacrylonitrile and polyethylene terephthalate, cellulose as regenerated fibers, and cellulose esters such as rayon and acetate.

The above-mentioned light-shielding member having pile yarn of the present invention (referred to as the light-shielding member of the present invention under the claw) is basically composed of pile and base fabric, and is manufactured by a method generally used for manufacturing light-shielding members having pile. For example, it can be obtained by plain weaving or twill weaving using a general loom, and those having the FA structure described in Japanese Utility Model Application No. 59-104143 can be obtained by using a tlA machine. When a light-shielding member having the pile yarn of the present invention is manufactured using a plain weave, twill weave, etc. that is tI on the above-mentioned general #1 machine, the pile yarn of the present invention is used as a warp yarn, and the pile yarn of the present invention is used as a V-hanging BU and WI
Both G and B can be used.

As the M fiber material for the base fabric of the light shielding member of the present invention, the same material as the 11M material used for the pile yarn of the present invention can be used. For! Miscellaneous materials may be the same or different.

In the light shielding member of the present invention, the height of the pile yarn of the present invention including the base fabric is preferably 1 to 21 m, and the filament density of the pile is preferably 20.000 to 50 m.
．． 000 pieces/ci is preferable, more preferably 25,
000 to 40,000 pieces/cm'.

In the light-shielding member of the present invention, if the pile is formed using the pile yarn of the present invention, the black dyeing process for the light-shielding member can be carried out even if the pile yarn is dyed at the pile yarn stage. In addition, for the purpose of preventing static electricity, the yarn may be subjected to antistatic processing such as carbon inclusion, and lζ pile yarn may be used, or it may be formed as a light-shielding cloth and then subjected to antistatic processing. You can also do that.

Also, when using a light shielding member, wide width (approximately 3Qca+~1
00cm) and then cut it to the width used as a light-shielding member.
J7! You can also. In this method of width 1.1 and LS 17, the cutting means is
The means described in No. 90 may be used, or any means such as an ultrasonic cutter, a laser cutter, a heat cutter, etc. can be used.

The photographic film magazine of the present invention can be obtained by the same manufacturing process as a normal film magazine, except that the pile yarn of the present invention is used as the pile yarn of the light-shielding member having piles. In the manufacturing process, for example, a rectangular metal plate, such as the magazine body, is heated, and a light-shielding member coated with adhesive is bonded to both ends of the plate by thermocompression. Next, the magazine body is rolled up, film is loaded, and a photographic film magazine is obtained.

In addition, in the photographic film magazine of the present invention, the height of the inside of the entrance/exit portion of the film magazine body before the shading member is attached to the film entrance/exit portion of the film magazine body to which the light shielding member of the present invention is adhered to both inner surfaces, respectively. 1. g, bottom, film entry/exit ROM) of the light shielding member used in the present invention.
! It depends on the height of the pile that adds up to 3, but III & 15
Go to 0・2. It is 97 preferable that GO+1101, and more preferably in the range of 1.80 to 2.40III1.

As a method of attaching the light shielding part (O) of the present invention to the magazine body (1) Kaimei No. 49-9G049, No. 53-105
219@, No. 53-405220, No. 53-1052
21, No. 54-4932, 1Th l:! 'I Showa 6
The method described in No. 0-15207 etc. can be applied.

In the photographic film magazine of the present invention, metals forming the magazine body include, for example, iron mesh, % fi)
aluminum, copper 1'A iJ3 J: and alloys thereof. In addition, the surfaces of these metals can be coated with phosphorous salt coatings, iron oxide coatings, chromate coatings/112d-based chromate coatings, chromate diphosphoric acid coatings, etc. It is also possible to do so in person. Furthermore, the surface of the metal is 1) Kaimei Go
-2606 January, same GO-26062, same Go-26
063, the paint described in Japanese Patent Application No. 60-75207, etc.
Covered with ink etc.
I tl, ink such as: 1 fat type, 1 fat type, j' acrylic resin type, epoxy resin type, poly/furthane resin type, polyester resin type, various anti-ribbon paints, water-based paints, cellulose derivatives, etc. etc. are given!

1. In the light shielding member of the present invention, a conditioner may be used to prevent the pile made of the pile yarn of the present invention from falling off the base and to prevent the adhesive from penetrating into the pile portion. Wear. The filler used in the present invention includes, for example, polyvinyl-based, polyolefin-based, polyurethane-based,
Blends of one or two types selected from synthetic resin emulsions such as polyamide-based, polyester-based, synthetic rubber-based, J-boxy-based, phenol-based, acrylic-based, etc. not included in these, or a combination of these Examples include coalescent emulsions.

In the present invention, the adhesive used to attach the light shielding member having the pile and the magazine body includes:
Polyolefins such as polyethylene, ■Dylene-vinyl acetate copolymer systems (h1 vinyl acetate copolymer systems such as this, acrylic acid ester copolymer systems such as ethylene-ethyl acrylate, ethylene-isobutyl acrylate, nylon 6,
Nylon 6°6, Vylon 10, Lylon 121. Nl
- Polyamides such as meth4 dimethylated nylon, polyesters such as terephthal R4, polyvinyl ether, poly61 vinyl, acedate, methyl cell [1-
Cellulose attractants such as acetate butyrate, polymethacrylic esters such as polymethylmethacrylate-1, polyvinyl ethers such as polyvinyl methyl ether, polyurethanes, polycarbonates, styrene-ethylene-bu-burene- A type that yellows from styrene-based block copolymers such as styrene, synthetic rubbers such as styrene-butadiene, isoprene, butyl rubber, special rubbers not included in these, and acrylic copolymers not included in the above. Or a mixture of two or more types can be mentioned.

[Specific Effects of the Invention] As explained above, in the photographic film magazine of the present invention, pile yarn having a Young's modulus in a specific range is used to
Furthermore, by making the light shielding member 12 inches thick, it was possible to provide a photographic film magazine that prevents scratches on the film without impairing the light shielding performance, and improves the efficiency of film drawer and rewind operations.

[Specific Examples of the Invention] Hereinafter, the present invention will be specifically explained using examples, but the embodiments of the present invention are not limited to these examples.

A light-shielding member with the filament density and pile height of the pile shown in Table 1 was created using pile yarn made of textile material and rayon as the base fabric. A film magazine sample V''l 1 to 19 was made 1'1 by ELMing the film on the right side of !4.

In addition, the width of the slit at the film entrance/exit part is 2.3 mm per unit.
It was held constant.

Table 1 For the above (9) 19 films IAk!1FA film magazine samples, after storage at 60 °C for 3 [1%,
After irradiation at 900 lux for 10 minutes with the film outlet facing upward, normal development was performed and the degree of light opening was visually judged, and all samples were found to be good with no light leakage.

Next, after photographing the first test of the same 19 types using a Konicare Fooda DD (manufactured by Konishi Roku Shamei Kogyo Co., Ltd.), normal processing was carried out to examine the degree of scratches that occurred on the film. When visually judged, considerable scratches were observed on the surface of the films of samples 13117-19.

In addition, in terms of operation when pulling out and rewinding the above-mentioned color strips and films after the film was shot, Samples 17 to 19 were difficult to handle compared to other samples, and there were problems in practicality.

From the above results, it is clear that in a photographic film magazine having a light shielding member using a pile yarn having a range king skewer according to the present invention, the Jfi (
It can be seen that this is a photographic film magazine with improved C prevention and smooth film drawer and rewind operations.

Claims (1)

[Claims] In a photographic film magazine in which a light shielding member having a pile is attached to the photographic film entrance/exit portion, the pile of the light shielding member has a Young's modulus of 100 to 1,800 (kg/mm^2).
A photographic film magazine characterized by being formed from threads of ).