JP2003195456A - Photographic film cartridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photographic film cartridge with a piece of lightproof cloth excellent in napped condition and satisfying photographic properties, light blocking effect and film drawing performance. <P>SOLUTION: The photographic film cartridge has a piece of lightproof cloth attached to a film drawing slit in the cartridge, wherein the piece of lightproof cloth comprises foundation cloth obtained by immersing foundation cloth in a napping oil solution comprising an ester-base wax and n-paraffin and napping the cloth after drying with a napping machine having a card clothing roller. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is for shielding the upper and lower inner wall surfaces of a slit-like opening for penetrating a photosensitive material formed in a cartridge body of a photographic film cartridge, a photographic paper, a magazine accommodating a printing material, and the like. The present invention relates to a light-shielding photosensitive material container having a feature of a light-shielding cloth piece (also referred to as “teremp”) attached to the.

[0002]

2. Description of the Related Art A photographic film cartridge has a spool, a cartridge body, a pair of caps attached to both sides of the body, and a photographic film wound on the spool as the minimum constitutional requirements. It is unexposed, and all or most of it is in the cartridge body wound on the spool, and is taken out of the cartridge body in the camera to be image-exposed and again in the cartridge body. It is a form of being caught. A 35 mm roll film for photography is used in a state of being stored in a cartridge. As is well known, this cartridge basically comprises a cylindrical shell plate, a spool housed in the shell plate, and a shell-like cap that closes the top and bottom. Then, a light-shielding cloth piece, which is usually called a “temperp”, is attached to the inner surface of the film outlet of the body plate.

In the conventional telemp, woven or knitted fabrics which are vertically stacked are woven or knitted together by pile yarns to form a two-layered woven fabric or knitted fabric, and then the upper and lower woven fabrics or approximately the center of the knitted fabric It is manufactured by cutting the pile yarn of (1) along the cloth surface. These teremps shield light from the contact of the pile yarn with the photographic film, and also have sufficient flexibility and pull-out resistance of the photographic film for ordinary use. However, the process of weaving or knitting a woven fabric or a knitted fabric with pile yarns has low productivity, and these telemps are expensive in cost.

On the other hand, Japanese Patent Application Laid-Open No. 7-152114 proposes a teremp in which a woven cloth is subjected to a raising treatment and the raised surface thereof is shirred (the fluff is cut and aligned). In addition, Japanese Patent Laid-Open No. 15825/1996 proposes a teremp having a woven fabric of warp knitting and inserted wefts and raising the wefts. These telemps shield the light from the raised fibers coming into contact with the photographic film. In general, the raising process is more productive than the process of weaving or knitting pile yarns into a cloth, and these teremps are inexpensive. Although the cost is low, it was necessary to keep the thickness of the raising cloth within a certain range in order to use these raising cloths for the photographic film cartridge. In the above publication, the thickness is kept constant by shirring, but there is a problem that shirred cut scraps are generated and the scraps are reflected on the film at the time of shooting, resulting in image damage. Further, in Japanese Patent Laid-Open No. 2000-29175, the processed yarn of the two-stage heater method is used, but it is bulky and effective for removing piles such as pile fabrics. Property) is reduced, the raising property is deteriorated, and the cost is increased because expensive yarn is used.

[0005]

The problem to be solved by the present invention is to provide a raised cloth composed of warp yarns and weft yarns at low cost, which has excellent raising properties and satisfies photographic properties, light-shielding properties and film drawing performance. An object of the present invention is to provide a photographic film cartridge having a light shielding cloth piece.

[0006]

The above-mentioned problems have been solved by the following means. (1) In a light-shielding cloth piece attached to a slit for drawing a film of a photographic film cartridge, the light-shielding cloth piece is dipped in a raising oil agent containing an ester wax and normal paraffin, and then dried to form the base cloth. A photographic film cartridge comprising a base cloth which has been raised by a raising machine having a needle cloth roller, (2) The raised oil agent is emulsified with a nonionic surfactant and an anionic surfactant (1) Photographic film cartridge described,
And (3) The photographic film cartridge according to (1), which comprises a base fabric which is dipped in the napped oil agent and napped within 7 days.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below.
FIG. 2 shows a cross section of an example of a light shielding cloth piece (teremp) used for the photographic film cartridge of the present invention. Telemp 2
Reference numeral 0 denotes a long body of cloth (hereinafter referred to as a base cloth) 32, a raised portion 31 formed by subjecting the base cloth 32 to a raising treatment, and an adhesive 3 for attaching to a slit of a photographic film cartridge.
4. An undercoating agent (hereinafter referred to as a sealing agent) 33 for preventing the adhesive from soaking into the base cloth. The thickness of the telempe is preferably in the range of 0.5 to 2.5 mm, more preferably in the range of 1.2 to 2.0 mm. The thickness of the raised portion 31 (D4 in FIG. 2) is 0.1 to 1.7.
The range of mm is desirable from the standpoint of drawing resistance of the photographic film. In addition, the raised portion of the telemp used in the present invention is characterized in that the height of the fluff can be easily adjusted without performing shirring after the raising treatment.

The base cloth 32 may be knitted cloth or woven cloth. When the base fabric is a woven fabric, the warp yarns are preferably filament yarns, and the weft yarns are preferably spun yarns or twin yarns or triplet yarns of the spun yarns. It is preferably a thread.
Further, the woven fabric is preferably 3 to 5 sheets of satin or 1/3, 1/4 twill, and particularly preferably 4 or 5 sheets of satin. Fig. 1 shows a conceptual diagram of the weaving structure of five satin.

The napped oil agent of the present invention will be described. An ester wax and normal paraffin are used in combination in the production of the light shielding cloth piece used in the cartridge of the present invention. As the ester wax, sorbitan fatty acid ester can be preferably used. The sorbitan fatty acid ester is obtained by further heating sorbitol fatty acid ester produced by dehydration condensation of sorbitol and fatty acid at about 190 ° C to 230 to 250 ° C. At this time, sorbide fatty acid ester is also produced as a by-product. The sorbitan fatty acid ester can be obtained as a commercial product from SPAN series manufactured by Atlas, USA, Kao Corporation, Sanyo Kasei Co., Ltd., and the like. Specific examples of the sorbitan fatty acid ester are sorbitan monolaurate, sorbitan monooleate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate, sorbitan distearate, and sorbitan tristearate.

The peculiarities of the wax used in the present invention will be described. Natural waxes are roughly classified into plant-based, animal-based and mineral-based waxes. Of these, synthetic waxes are roughly classified into coal-based synthetic waxes, petroleum-based polyethylene waxes, and fat-based synthetic waxes (ester-based, amide-based, glyceride-based). Further, petroleum wax is roughly classified into paraffin wax (straight chain), microwax (side chain normal temperature solid), and petrolactam (side chain normal temperature semisolid). The present inventors have selected a normal paraffin belonging to petroleum wax among various types of wax, and by using this in combination with an ester oil / fat synthetic wax,
In particular, it was found that polyester fibers can be efficiently raised by lowering the friction coefficient between fibers and completed the present invention.

As the normal paraffin, commercially available products can be obtained from the paraffin wax series of Nippon Seiro Co., Ltd. For example, the average number of carbon atoms is 23 to 33, and the melting point is 50.
It is preferably -60 ° C.

The preferred use ratio of ester wax and normal paraffin is from 1.5: 1 to 2.5: 1. More preferably, it is about 2: 1.

The above napped oil agent is preferably used after being emulsified with a non-nonionic surfactant and an anionic surfactant. As the non-nonionic surfactant, polyoxyethylene alkyl ether is preferable. As the anionic surfactant, sodium alkanesulfonate having a carbon number range of 12 to 15 is preferable. Specific examples of the non-nonionic surfactant and the anionic surfactant are shown below, but the invention is not limited thereto (here, -C ₆
H ₄ − represents a phenylene group. ). _{1: C 16 H 33 (OCH} 2 CH 2) 10 OH 2: C 9 H 19 -C 6 H 4 - (OCH 2 CH 2) 12 O
H3: Sodium dodecylbenzenesulfonate 4: Sodium tri (isopropyl) naphthalenesulfonate 5: Sodium tri (isobutyl) naphthalenesulfonate 6: Sodium dodecyl sulfate 7: α-Sulfasuccinic acid di (2-ethylhexyl) ester sodium salt 8: _{C 8 H 17 -C 6 H 4} - (CH 2 CH 2 O) 3 (C
H ₂ ) ₂ SO ₃ K The preferred use ratio of the non-nonionic surfactant and the anionic surfactant is 1.5: 1 to 1: 1.5,
More preferred is about 1: 1. The ratio of the surfactant used to the raised oil agent is 3 with respect to 100 parts of the raised oil agent.
0-50 parts, more preferably about 40 parts.

Next, a preferred embodiment of the napped oil agent attaching step will be described. In the attaching step, using a heat tenter, the temperature is 100 to 150 ° C., and the cloth speed is 10 to 30 m /
Min, a mangle load of ^{2 to} 10 kg / cm ² , and a mangle drawing ratio of 40 to 80%.

It is preferable to raise the hair within 7 days after the immersion in the raising oil. It is more preferable to raise the hair within 1 to 6 days.

FIG. 2 shows a cross section of the raised cloth, and FIG. 3 shows a cross section of the light shielding cloth piece. It is desirable that the raised portion 31 and the base cloth 32 have a light-shielding property and have a low charging property. In order to improve the light-shielding property, the base cloth is preferably colored, and its color and coloring method are not particularly limited. In particular, black has a wide light absorption wavelength range and is effective in improving the light-shielding property. As a coloring method, the base cloth may be dyed, or the colored cloth may be woven or knitted to form the base cloth. Further, when the photographic film is taken out from the photographic film cartridge, the raised part of the telem and the photographic film may rub against each other and the telem may be charged. Therefore, it is desirable that the base cloth be one in which a conductive material or an antistatic agent is added or whose surface is coated with an antistatic agent. An example of the conductive material is carbon black. Since carbon black is black, it is also advantageous from the viewpoint of light shielding properties.

Although the material of the sealing material 33 is not particularly limited, it is desirable that the material has affinity for both the base cloth 32 and the adhesive 34. Common examples include natural rubber, casein, polyvinyl alcohol and its derivatives, polyacrylamide, vinyl methyl ether-maleic anhydride copolymer, and phenol resin. Adhesive 34
May be either a pressure-bonding adhesive or a hot-melt (heat-sensitive) adhesive, and the components thereof are not particularly limited. Examples of pressure-sensitive adhesives include rubber adhesives, acrylic adhesives, vinyl methyl ether-maleic anhydride copolymers, and the like, and examples of hot melt adhesives include ethylene-vinyl acetate copolymers, polyamides, and the like. To be Further, a sealing adhesive having both a sealing agent and an adhesive may be used without using the sealing agent 33.

The telemp of the present invention can be manufactured, for example, as follows. A raising treatment, which will be described in detail later, is applied to one surface of the woven or knitted fabric elongated body. A sealing agent is applied and dried on the other surface of the raised surface, and an adhesive is applied and dried. The napped long fabric thus obtained is cut into a predetermined size.

When the elongated fabric is dyed and then the raised fabric is subjected to a raising treatment, the elongated fabric is heat-treated (hereinafter It is desirable to perform dyeing after preheating. The preheat setting is performed by blowing hot air of 180 ° C., for example. The width at the time of heat treatment (blowing with hot air) is preferably set such that the width is pulled / expanded by about 1 to 5% from the width before heat treatment.

The nap treatment is carried out by a generally used method, that is, having a long fabric under transportation and needle-like protrusions,
This is carried out by contacting (rubbing) a cloth roller that rotates in a direction opposite to the conveyance direction of the long cloth body. As for the raising treatment, it is desirable to first perform rough raising treatment and then perform fine raising treatment. In addition, the rough raising treatment here means raising the cloth so as to give coarse and long hair (low raising density), and the fine raising means finely raising the cloth (high raising density), for example, It can be adjusted by changing the conveyance speed of the cloth elongated body, the rotation speed of the roller, the length and number of the needle-shaped protrusions, the contact torque between the cloth elongated body and the cloth cloth roller, and the like. The elongate body subjected to the raising treatment may be raised in a direction opposite to the direction in which the raising treatment is performed in order to further enhance the raising effect. In addition, although the number of times of nap raising treatment is not particularly limited, by repeating it, the number of naps is increased, and the napped density of the napped fibers is increased, so that the nap raising effect can be enhanced.

In the present invention, a light-shielding cloth piece is used in which the cloth piece is coarsely raised so that the thickness of the cloth piece is thick, and then the surface of the raised cloth is finely fluffed. When the hair is fluffy and finely brushed, the cloth piece is compressed by a slight load when the thickness is measured, and the thickness is apparently reduced. By repeating fine brushing, a softer touch is given and the apparent thickness becomes thicker. If you raise it gently like this,
The light-shielding property of the light-shielding cloth piece used for the photographic film cartridge is improved. In addition, the thickness of the cloth piece can be gradually increased by gradually raising the hair to make it soft, and the thickness of the cloth piece can be accurately controlled, so that shirring is not necessary.

FIG. 4 is a schematic view showing an example of a raising machine used in the present invention. 1 continuous raising machine (for rough raising treatment) has a wide interval between the needle cloth rollers rotating in the forward and reverse directions, and the rotation speed of the entire cloth cloth rollers is set to be slow, so that the cloth is tightly wrapped around the cloth cloth rollers. By making contact with each other, the pulling force of the yarn of the cloth is strong, and it is possible to nap the loop type, which has a large thickness and a large width. This plays a very important role in the next step (for fine nap treatment). The double nap raising machine (fine napping) has a narrow interval between the cloth cloth rollers rotating in the forward and reverse directions, and the rotation speed of the entire cloth cloth rollers is set to be high to further increase the surface of the cloth napped by the rough napping. Brushes finely and softly. This adjusts the final thickness. Since the width of each brushing is not so large as that of the rough nap, it is preferable that the width of the nap is sufficiently increased. In FIG. 4, as one embodiment, one continuous raising machine has 18 counter rolls C and 18 pile rolls R.
There are a total of 36 in total, and the double raising machine has 12 counter rolls for the front drum and 12 pile rolls for a total of 24 rolls.
There are 12 counter rolls of the rear drum and 12 pile rolls, for a total of 24 rolls.

Preferred materials for the light shielding cloth piece will be described. The warp is a processed yarn of a one-step heater method, and the thickness of the warp is preferably 75 to 140 denier and the number of filaments is preferably 36 to 48. The interlacing (air entanglement) of the warp is preferably 150 to 250 times / m to prevent the fray of the yarn.
If the number of twists of the weft yarn is small, the yarn will come off during raising, so 250-350 times / m of strong twist is preferable. In order to achieve the product performance, particularly the film drawing torque and the light shielding property, the warp density is 120 to 150 yarns / inch,
The weft density is preferably 60 to 90 yarns / inch. The weft is preferably a spun yarn having a denier of 1.0 to 1.4 equivalent to that of a single fiber. The span length is preferably 38 to 50 mm because of the raising property. If it is too small, the thread will come loose during brushing. If it is too large, the brushing property deteriorates.

Preferred examples of control / adjusted values of torque conditions in the raising process and process control values of width / thickness / warp density are shown below. Raising 1 to 2 times was one continuous raising machine having a high raising torque, and raising 3 to 6 times was two raising machines (two raising drums) using a raising machine having a relatively low raising torque. The number of times brushed is
In the case of rough nap, it is preferable that the nap is twice in one row (when the hair is fluffed more than three times), and the rough nap can be set once in two rows. In the case of fine brushing, a low brushing torque / many times raising is preferable, and 4 times is preferable for two times in order to defibrate a bundle of wefts drawn out by rough raising to adjust the thickness to a target value. 1
It was also possible to use 8 times in a row, 2 times in a 4 times or 1 time in an 8 times.

[0025]

EXAMPLE An example of producing a light shielding cloth piece will be shown below, but the present invention is not limited to this. As warp, a processed yarn made of 100% polyester fiber 75 denier 36 filament (filament yarn) by a one-step heater method, with a twist number of 300 times / m and interlace (air entanglement) of 200 times / m is used. did. As the weft yarn, a polyester yarn of 100% and a 20 count yarn, a spun yarn equivalent to 1.4 denier, and a yarn having a twist number of 300 times / m by strong twist were used. An air jet loom was used as the loom, the warp yarn density was 134 yarns / inch, the weft yarn density was 68 yarns / inch, and the weaving design was 5 sheets satin. The dyeing machine uses a high-pressure jet circular, the dye is a disperse dye, and the dyeing density is 7
% Owf. As the napping oil agent, 10% by mass of sorbitan distearate (ester wax),
Raised using a mixture of 5% by mass of normal paraffin (petroleum wax), 3% by mass of polyoxyethylene alkyl ether (nonionic surfactant), and 3% by mass of sodium alkanesulfonate (anionic surfactant). The oil concentration was 2.0% by mass.

The total number of times of raising hair is 6, and the details thereof are as described below. That is, the coarse nap with high rotation torque of the needle cloth roller that naps one of the two wefts
The nap raising with a relatively low torque for opening the bundle is performed four times. The raising condition was adjusted 6 times in total, and the target thickness after raising was adjusted to 1.55 mm. After this, the shirring step was not performed, and the raised portion of the weft was left in the loop shape. After the nap raising treatment, the antistatic agent and the sealing agent were applied, and then the light shielding cloth piece was attached to the film loading / unloading port of the 135 film cartridge with an adhesive. As the antistatic agent, a cationic antistatic agent (Eletat AK-10 (trade name) manufactured by Yatsusha Yushi Kogyo Co., Ltd.) (a guanidine hydrochloride-based special cationic polymer) is used, and the concentration of the antistatic agent is 0.4. % By weight Emulsion-based styrene-acrylic resin (viscosity: 1500 mPa)
・ S) was used, and the coating of the sealing agent was performed by a reverse knife coater method. The coating amount of the sealing agent was 45 g / m ² . An emulsion-based styrene-acrylic resin (viscosity: 1300 mPa · s) was used as the adhesive, and was applied by a rod coater. The adhesive coating amount was 75 g / m ² , and the thickness of the light-shielding cloth piece after coating was the target value of 1.6 mm.

After coating the sealing agent, the light-shielding cloth piece was cut (slit) into a width of 11.5 mm and a width of 9.5 mm by an ultrasonic slitter. The slit width may be the same at the top and bottom of the film entrance / exit. After cutting (slitting), traverse winding was performed on a plastic reel. After that, the plurality of thin plates are continuously conveyed by arranging the plurality of thin plates in a state in which the front end and the rear end are close to each other, that is, the left ends and the right ends are arranged in a line, and a long sheet 2 to which an adhesive is applied in advance.
A crimping means for pressing the telempe of the book against the left and right ends of the thin plate being conveyed is provided, and each telempe is continuously stuck along the left end and the right end of the thin plate, and the long length after sticking Each of the thin plates was cut from the back side to form a cartridge body plate. Further, in this cartridge, a color negative film having ISO sensitivity of 400 (Fujicolor SUPERIA 400 manufactured by Fuji Photo Film Co., Ltd.)
(Trade name) was wound around a spool and stored, and in this state, quality characteristics of light-shielding property and drawing torque were evaluated. The results are shown in Table 1.

(2) Evaluation method (raising property): When the thickness of 1.45 mm or more was obtained by the standard raising torque of the raising machine, and when it was possible to obtain the thickness of 1.40 mm or more within the raising torque adjusting range. △, thickness is 1.
The case of less than 40 mm was marked with x. (Image quality) Shooting and developing 10 films of 36 shots
After printing, the case where there was one pile of dust reflected in the print was marked as X, and the case where it was not marked was marked as ◯. (Light-shielding property) The sample was conditioned at room temperature for 24 hours, and then exposed to light of 90,000 lux for a total of 5 minutes for 15 minutes each from a total of 3 directions on the port mouth and 2 sides, and then developed and exposed to light. The overcoat was evaluated. The case where the covering was within 15 cm from the port opening was evaluated as ◯, the covering was within 15 cm from the port opening, and the covering was within the limit of Δ, and the case where the covering exceeded 15 cm from the port opening was evaluated as x. (Drawout torque) The sample was subjected to humidity control at room temperature for 24 hours, and then the pullout force was measured with an Instron tensile tester (Strograph V1-C manufactured by Toyo Seiki Co., Ltd.). "Instron" is a developer of this type of testing machine and is sometimes called Strograph or Tensilon. The tip of the film was sandwiched by an attached chuck, the drawing speed / chart speed was measured at 500 mm / min, and the peak value was read from the chart. ○ within standard value, × over
And

[0029]

[Table 1]

EFFECTS OF THE INVENTION In a light-shielding member which is made of warp and weft, which is inexpensive, and which is raised, the target thickness of the raising cloth can be obtained.
It is possible to provide a light-shielding cloth piece for a photographic film cartridge, which can secure stable light-shielding performance and film drawing-out performance.

[Brief description of drawings]

FIG. 1 is a schematic view showing a weave design (five satin) of a raised fabric according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view schematically showing an example of a raised fabric used in the present invention.

FIG. 3 is a cross-sectional view of a light shielding cloth piece according to an embodiment of the present invention.

FIG. 4 is a schematic view of a raising machine used for manufacturing the light shielding cloth piece of the present invention.

[Explanation of symbols]

10 Photographic film cartridge 11 Light-shielding container 12 spools 13 photographic film 14 Slit for drawing film (port) 20 Telemp 31 Raised part 32 Long body (base cloth) 33 Sealant 34 Adhesive

Claims (3)

[Claims] 1. A light shielding cloth piece attached to a slit for drawing out a film of a photographic film cartridge,
The light-shielding cloth piece is characterized in that the base cloth is formed by immersing the base cloth in a raising oil agent containing an ester wax and normal paraffin and then drying the base cloth, and raising the base cloth by a raising machine having a needle cloth roller. Photo film cartridge. 2. The photographic film cartridge according to claim 1, wherein the napped oil agent is emulsified with a nonionic surfactant and an anionic surfactant. 3. The photographic film cartridge according to claim 1, wherein the photographic film cartridge is made of a base fabric which is dipped in the napped oil agent and napped within 7 days.