JPS6298347A - Magazine for photographic film - Google Patents

Abstract

PURPOSE:To improve the light shading property of the titled magazine by sticking a pile composed of a bulky yarn to the entrance of the film of the titled magazine as a shading material. CONSTITUTION:The bulky yarn is produced by crimping, curling and roping the fiber such as a polyamide, a polyethylene terephthalate, a polyethylene, a cellulose and a wool, etc. The shade is effected by piling the yarn and by sticking the obtd. pile to the entrance of the magazine of the film with an adhesives such as an acrylic emulsion, etc. Thus, as the pile formed by the bulky yarn is used to the shading material, the shading characteristics of the titled magazine is improved, and the surface of the film is not injured, when the film is pulled out and is wound up.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention "Industrial Applications" The present invention relates to a photographic film magazine, and more specifically, to an improved light-shielding member for piercing a pile used in a photographic film magazine. , ; Introducing a photographic film magazine with improved optical properties.

[Back of the Invention] In a photographic film magazine, no light enters the inside of the magazine body from the film entrance/exit.J: A light shielding member is pasted 4 on the film entrance/exit.

This light-shielding member not only prevents the film l\ from being exposed to light, but also protects the film drawer ■1 and roll i;
To prevent scratches and to facilitate film withdrawal and rewinding operations, a flexible 4A material of pile fabric is used.

On the other hand, recent photographic films are becoming more sensitive and high-quality, and as a result, there is a demand for light-shielding materials that have improved light-shielding properties, such as Filno, which is the basic performance of the light-shielding materials used. There is.

On the other hand, conventional methods for improving the light-shielding performance of light-shielding members include methods of increasing the pile density IQ of pile fabrics used in light-shielding members. ,? ' The problem was solved by reducing the gap between the film magazine's film entrance and exit.

However, in the method 15 to increase the pile tone of pile fabrics, more pile fibers are used than before in order to increase the number of piles, so costs such as AU costs and processing costs are reduced. The upper back is avoided, and the pile PA t
The occurrence of a was not suppressed. This falling off of the pile is caused by the falling of the pile during the photographic film magazine Ie process.
I made notes inside the magazine and reproduced them on the photographic film.''
When you put it on, the film is small (the attached area comes off white)
The disadvantage was that it caused

Further, even after the film magazine was commercialized, the same problem occurred when the pile fell off during film drawer J3 and rewinding, and was attached to the film surface.

Furthermore, by increasing the pile Wj degree, the number of piles in contact with the film increases! Therefore, the load IF for pulling out and rewinding the film becomes large, and for this reason f! F. r! 5 Charged suspension increases rapidly, 3! [! If the film is transported at high speed when the film is pulled out, such as in a continuous dimple, static electricity may be generated. This causes an inconvenience in that spark damage (hereinafter referred to as static failure) due to static electricity is more likely to occur on the photosensitive surface of the film.

How to make the gap between the film entrance and exit part smaller (
In this case, the load at the time of drawing out and rewinding the film becomes large, and accidents such as damage to the surface of the film are likely to occur.

The title of the present invention is based on the results of intensive studies on the light-shielding performance of light-shielding members, and it was discovered that the bulkiness of the yarn forming the pile of the pile fabric used in the light-shielding member is related to the light-shielding performance of the light-shielding member. This is what I have come to do.

[Object of the Invention] An object of the present invention is to provide a photographic film magazine having a light-shielding member with improved light-shielding performance.

[Structure of the Invention] The above-mentioned object of the present invention is to provide a photographic film magazine in which a light shielding member having a pile is attached to a photographic film entrance/exit portion; achieved.

[Specific Structure of the Invention] The photo film magazine of the present invention is characterized in that a bulky yarn having bulkiness is used for the pile of the light-shielding member having piles. This is a photographic film magazine in which a pile formed from the bulky yarn is attached to the film entrance and exit portion as a light shielding member.

The bulky yarn used in the present invention has increased bulk by changing the shape of the navy blue yarn.

The bulky yarn used in the present invention 21' ]F How 31! Among the materials that are used for yarn, there are those that are made from spun yarn that has been processed to make it bulky.

A practical example is the means for processing filaments (
Δ) How to do this: 1) To give a crimp to the filament 1, pass the filament between heated small gears to give it a tooth shape, or (1) heat the filament with a roller with a smooth surface. The insertion time into the heater fml a % box and the pulling speed [q] can be adjusted to adjust the crimp.

2) To give the filament a curl, the filament is twisted, heat-set, and then untwisted, and the curl is adjusted by twisting the filament.

3) As a method for forming a loop in the filament, there is a method in which compressed air is ejected from a nozzle and the filament is passed through this air flow to form a loop in the filament.

As for the means (B) of raising the spun yarn, the filament I, which has been elongated using heat in advance, is cut into an aggregate by a method such as cutting the filament I. change,
A fiber that has the possibility of shrinkage is created by heat treatment, and this is mixed with a fiber that does not shrink much during heat treatment and spun to form a yarn. After forming the spun yarn, heat treatment is performed to shrink the fiber. Do 4′! You can move through bulky threads by using the bait.

As for the above-mentioned bulking means, an appropriate method is selected and used depending on the scale, properties, etc. of the cord used.

In d3 of the present invention, any means can be used to increase the bulk of the yarn forming a pile, and is not limited to the means exemplified above.

By applying a processing method to increase the rake height, the rake height increases by about 30% to 200% compared to the unprocessed fiber, but the bulkiness of the bulky yarn used in the present invention is the highest. A preferred range is about 50% to 100%.

The pile formed from bulky yarn used in the photo film magazine of the present invention (hereinafter referred to as the pile of the present invention) has a yarn thickness of 50 denier to 150 denier, and has a yarn thickness of 50 denier to 150 denier.
It is preferably formed from 5 to 100 filaments, and more preferably the thread thickness is 70 denier to 120 denier.
denier, and is formed from 45 to 60 filaments.

The yarn forming the pile of the present invention is referred to as the pile yarn of the present invention.

As the i1M wood for the pile system of the present invention, any of the above-mentioned materials with increased bulk can be used without being limited to the material (e.g., polyamide-based wood of Vuylon 6.6cm,
Polyesters such as polynibre ethylene terephthalate 1 and above, polyolefins such as polyethylene, polyvinyl alcohols, polyvinylidene chloride, acrylics such as polyacrylonitrile, acrylamide, and methacrylamide, and polycyanide nylidene. , synthetic fibers such as polyfluoroethylene, polyurethane, silk, cotton, wool, cellulose, cellulose ester, natural delicate, recycled fibers (rayon, A-day 1-, etc.). Alternatively, a combination of two or more types can be mentioned. Preferably, these fibers include polyamides such as nylon 6 and nylon 6.6, acrylics such as polyacrylonitrile, acrylamide, and methacrylamide, polyesters such as polyethylene terephthalate, and cellulose and cellulose ester as regenerated fibers. rayon and acetate.

The above-mentioned light-shielding member made of pile yarn of the present invention (hereinafter referred to as the light-shielding member of the present invention) 1 is basically composed of pile and base fabric, and is generally a method used for making a light-shielding member having pile. For example, it can be made by plain weave by general fJ IiC, it can be made by cradle, and it can also be made by knitting structure described in Japanese Utility Model Application Publication No. 59-104143. The pile yarn of the present invention can be obtained as a warp when the light shielding member having the pile of the present invention is made of a plain weave, a twill weave, etc. , it is possible to use dora dashi with 1 thread and 2 threads on the weft.

The fiber base cloth of the light shielding member of the present invention can be made of the same EV TLT material used for the pile yarn of the present invention, and the JJ and pile yarns of the light shielding member of the present invention can be The material for the thread binding cord)) and the material for the canvas M material may be the same or different.

In the light shielding part (A) of the present invention, the height of the pile of the present invention including the base fabric is preferably 1 mm to 2 mm, and the filament density of the pile is preferably 20,000-2 mm.
, 40.0OOJ, y'CB' is II-(early, more preferably 25,000 to 40,000/Cm/.

In the light-shielding member of the present invention, if the pile is formed using the pile of the present invention, the black dyeing process for the light-shielding member can be performed by dyeing the pile yarn of the present invention on the second floor. It is also possible to dye the yarn after it has been formed by drying.Furthermore, for the purpose of preventing static electricity, it may be used as a pile yarn that has been treated with an anti-static treatment such as by incorporating carbon into the yarn. After forming it as a light-shielding cloth, it can also be subjected to charging processing.

When installing the light shielding member, use a wide width (
After manufacturing it to a width of about 3 Q cm to 100 cm, it can be cut to a width for use as a light shielding member, or it can be equipped from the beginning with a width for a light shielding member. Cut this wide width (■
In the method of
The means described in the above may be used, and the means of ultrasonic cutter, laser cutter, heat cutter, and 2'I may also be used.

In the photographic film magazine of the present invention, the fabrication process is the same as that of the film magazine in step 1;i except that the pile yarn of the present invention is used for the pile yarn of the light-shielding part and iA that moves the pile to the right). In the manufacturing process, for example, a rectangular metal plate that will become the magazine body is heated, and a light shielding member coated with adhesive is bonded to both ends of the rectangular metal plate.Then, the magazine body is rolled up, By applying RIts and kitotsubing to the film, the number of photographic film magazines becomes 4!
1 will be given.

The method of attaching the light shielding member of the present invention to the magazine body is described in Japanese Patent Application Laid-open Nos. 49-96049 and 53-105219.
The methods described in Japanese Patent Application No. 53-105220, No. 53-105221, No. 54-4932, Japanese Patent Application No. 75207-1980, etc. can be applied.

In the true film magazine of the present invention, metals forming the magazine body include, for example, iron chains, zinc, etc.
Aluminums, coppers and alloys thereof are used. In addition, the surfaces of these metals can be coated with phosphate coatings, iron oxide coatings, chromate-1 coatings, chromic acid-based oxide coatings, rimic acid diphosphoric acid-based IIG:
Metal surface treatment may be performed by a chemical conversion method or the like.

Furthermore, the surface of the metal is 1.1
, No. 6O-2GO02, No. Go-26063, Special F
'fl Crj 60-75207 It may be coated with the paint, ink, etc. described in 'fl Crj 60-75207. Specific paints and inks include alkyd resins, amino-alkyd resins, vinyl resins, acrylic resins, epoxy resins, polyurethane resins, polyester resins, various rust paints, water-based paints, and cellulose. Examples include derivative paints, inks, and the like.

In the light-shielding member of the present invention, a stopper can be used to prevent the pile made of the pile yarn of the present invention from falling off the base fabric and to prevent the adhesive from penetrating into the pile portion. The sealants used in the present invention include, for example, polyvinyl-based, polyolefin-based, polyurethane-based, polyamide-based, polyester-based, synthetic rubber-based, epoxy-based,
Examples include one or more blends selected from phenol-based emulsions, acrylic-based synthetic resin emulsions not included in these, or copolymer emulsions that are a combination of these. These can be used not only as a sealant but also as an adhesive for bonding the magazine body and the light shielding member.

In the present invention, the adhesive used to attach the light shielding member having the pile of the present invention to the magazine body may be a polyolefin adhesive such as polyethylene, or a vinyl acetate copolymer adhesive such as ethylene-vinyl acetate copolymer. - system,
Acrylic acid ester co-composite systems such as ethylene-edyl acrylate and ethylene-iso I-thyl acrylate, nylon 6, nylon 6.6, buylon 10, nylon 12
, polyamides such as N-methoxymethylated nylon, polyesters such as terephthalic acid, polyvinyl ethers, polyvinyl acetate, cellulose derivatives such as acetate, methyl cellulose, and butyrate, and polyesters such as polymethyl methacrylate. Methacrylic acid ester type, polyvinyl ether type such as polyvinyl methyl ether, polyurethane type, polycarbonate type, styrene type block copolymer system such as styrene-ethylene-butylene-styrene, styrene-based block copolymer system such as styrene-ethylene-butylene-styrene, styrene-based 11 diene, isoprene, bubble rubber, etc. Examples include one or a mixture of two or more selected from synthetic rubbers, special rubbers not included in these, acrylic copolymers not included above, etc.

[Specific Effects of the Invention] In the photographic film magazine of the present invention, the light shielding member having a pile formed of bulky yarn is attached to the photographic film entrance/exit portion, thereby further improving the light shielding performance. can. Further, the use of a light shielding member having a pile made of bulky yarn can be easily incorporated into the manufacturing process, and the increase in manufacturing costs can be minimized.

Furthermore, in a light-shielding member having a pile formed of bulky yarn, since the elastic pile of the present invention is raised face-to-face in the gap where the film enters and exits, it provides cushioning to the film passing through this gap. This method is effective and does not cause malfunctions during the manufacture or use of photographic film magazines, such as an increase in the load when pulling out and rewinding the film, damage to the film surface, and generation of static electricity.

[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.

Example 1 A light-shielding member having a viscose silk (rayon) base fabric and piles made of nylon 6°6 (including bulky piles) was attached to the magazine body with an acrylic emulsion adhesive. The following test was carried out by loading Sakshi SR-1600 according to the method.

J3, the pile length of the light-shielding ribbon used is 1.4 mm.
belongs to.

As a light shielding test, a stationary magazine was irradiated with 250,000 Lμ of illuminance from four directions (top, bottom, left and right) for 4 minutes each, and then the film loaded in the VL in the magazine was developed. The exposure conditions of the film were examined, and those that showed light fog were counted as failures. Targeting 100 samples,
The results are displayed based on the number of failures.

The pull-out load test was carried out in accordance with JIS K7519.

The number of specimens was 100, and the pullout load was the average value.

As a static failure test, continuous exposure was performed at 6 frames/second using a motor drive MD-4 for Nikon F3, and then the film was developed to investigate the occurrence of static failure due to the generation of static electricity.

The number of specimens was 100.

The results are shown in Table-1.

Comparing margin samples 1 and 2 below, if the pile density is the same for piles made of bulky yarns subjected to bulk processing,
It is clear that the light-shielding properties are extremely improved without causing any other failures.

Example 2 Example 1 except that a crimped bulky yarn was used instead of the curled bulky yarn in Example 1.
I did the same thing. However, if the pile filament density is 2
The filament density was 8,000 filaments/Cf, and in the comparative example, a pile with a filament density of 40,000 filaments/Cf without bulking was used.

The results are shown in Table 2 below.

In the following comparison of blank samples 3 and 4, when the pile density is increased, the pull-out load increases, and a static failure due to static electricity due to Fi1' frictional charging occurs. Piles using bulky yarns provide sufficient light-shielding properties without increasing the pile density, and other failures do not occur.

As seen in Sample 1'12 of Example 1 and Sample 4 of Example 2, in both curling and crimping, a light-shielding member having a pile made of bulky yarn that has been subjected to a bulky process is used. In the case of the present invention used, the pile density was 25,000 pieces/Cv', 28,000 pieces/Ct.
It can be seen that even if the light-shielding performance is not that high, the light-shielding performance has been sufficiently improved without causing any other failures.

Claims (1)

[Claims] 1. A photographic film magazine in which a light-shielding member having a pile is attached to a photographic film entrance/exit portion, wherein the pile of the light-shielding member is formed from bulky yarn.