JPH06181969A - Slitter - Google Patents

Abstract

(57) [Summary] [Purpose] After slitting the continuous web 1, it is not necessary to sterilize the continuous web 1 as a packaging material for bags or containers of food or medicine. [Structure] A wide continuous web 1 is unwound from a web 3,
In a slitter for slitting a continuous web 1 having a required width and winding the slit continuous web 1 on a winding roll 8, a continuous web feed path between the unwinding portion 2 and the slit blade 5 or the slit blade 5 and the winding portion. An ultraviolet irradiation device 13 is provided in the continuous web feeding path between the seven, and both surfaces of the continuous web 1 are irradiated with ultraviolet rays, and the continuous web 1 is sterilized by the ultraviolet rays.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slitter for slitting a wide continuous web into a continuous web having a required width, and is particularly used as a packaging material for forming a bag or container for filling and sealing food or medicine. It relates to a continuous web slitter suitable for

[0002]

2. Description of the Related Art A bag or container is molded from a packaging material, and the bag or container is filled with food or medicine,
When sealing, continuous webs of plastic films of various materials are used as packaging materials. For example, sheet-like base materials such as biaxially oriented polypropylene, polyethylene terephthalate, nylon 6, polycarbonate, aluminum foil, pulp paper, low density polyethylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid alkyl ester copolymer, A laminate obtained by laminating a heat-sealing film of a low melting point resin such as an ethylene resin such as ethylene / acrylic acid copolymer or a propylene resin such as propylene / ethylene copolymer and propylene / ethylene / butene-1 copolymer. A continuous web of is often used as the packaging material.

Further, regarding the packaging material, it is required to highly sterilize the packaging material when filling food or medicine, and many sterilizing devices have been developed and proposed so far. For example, that described in Japanese Examined Patent Publication No. 9218/1988 is that. In the device of the publication,
The packaging material forms a food container, and the container is irradiated with ultraviolet rays, and the container is sterilized by the ultraviolet rays. The same applies to those described in JP-A-62-49853. In addition, in the one described in JP-A-61-164927, a continuous web is used as a packaging material in a food filling process, the continuous web is irradiated with ultraviolet rays, and the continuous web is sterilized by the ultraviolet rays. It Then, the continuous web is sent to the food filling position, and the bag is formed by the continuous web at the food filling position, and the bag is filled with the food. In the one described in JP-A No. 62-271823, in the food filling process,
The continuous web is irradiated with ultraviolet rays, the continuous web is sterilized by the ultraviolet rays, and then the continuous web is used to mold a container and the container is filled with food.

By the way, in the apparatus disclosed in Japanese Patent Publication No. Sho 64-9218 and Japanese Patent Application Laid-Open No. 62-49853, in order to sterilize a molded container, each container is sent to a sterilizer and each container is irradiated with ultraviolet rays. However, there is a problem in that the number of man-hours increases and the cost increases accordingly. On the other hand, JP-A-61-164927 and JP-A-61-164927.
In the apparatus of JP-A-2-271823, when the continuous web is fed to the food filling position, it cannot be continuously fed, and the continuous web needs to be temporarily stopped each time the food is filled. Therefore, when the continuous web is irradiated with ultraviolet rays, when the continuous web is temporarily stopped, ultraviolet rays are excessively irradiated at a specific portion of the continuous web, which causes discoloration and odor of the continuous web. There is.

It is well known that the continuous web is slit by a slitter after the continuous web is manufactured. In the unwinding part of the slitter, a wide continuous web is unwound from the original fabric, the unwound continuous web is guided to a slit blade, and is slit into a continuous web of the required width, and the slitted continuous web is wound in the winding part. The web is wound on a take-up roll. Then, the wound continuous web is used as a packaging material for bags or containers of food or medicine.

Therefore, after slitting the continuous web, before using the continuous web as a packaging material for a bag or container of food or medicine, the continuous web of the take-up roll is rewound by a test rewinding machine, It is also conceivable to irradiate the continuous web with ultraviolet rays and thereby sterilize the continuous web. However, it is inevitable that the number of man-hours will increase and the cost will increase.

[0007]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems,
After slitting the continuous web, when the continuous web of the winding roll is used as a packaging material for bags or containers of food or medicine, it is not necessary to sterilize the continuous web.

[0008]

According to the present invention, a wide continuous web is unwound from a web and slit into a continuous web having a required width.
In a slitter that winds a slit continuous web on a winding roll, an ultraviolet irradiation device is provided in the continuous web feed path between the unwinding part and the slit blade, and both sides of the continuous web are irradiated with ultraviolet light, and the continuous web is irradiated by the ultraviolet light. Are sterilized. Instead of this, an ultraviolet irradiation device may be provided in the continuous web feeding path between the slit blade and the winding portion, and the continuous web may be sterilized by this.

Further, it is preferable that the unwinding portion of the slitter, the slit blade, the winding portion and the continuous web feeding path are arranged in a clean room. The clean room may be of a type that circulates clean air filtered by a filter.

Further, an ultrasonic vibrating air radiating device is provided in the continuous web feeding path between the slit blade and the winding portion, and ultrasonic vibrating air is radiated on both sides of the continuous web to remove dust from the continuous web. It is preferable. further,
It is preferable that a high-frequency ionized air emission device is provided in the continuous web feed path between the slit blade and the ultrasonic vibration air emission device, and high-frequency ionized air is emitted to one or both surfaces of the continuous web, and the continuous web is neutralized by the high-frequency ionized air. .

[0011]

Description of Embodiments Embodiments of the present invention will be described below.

In FIG. 1, this is a slitter which slits a continuous web 1 and has an unwinding part 2. Unwinding part 2
Is the continuous web 1 of the continuous web 1, and the continuous web 1
And is arranged in the clean room 4. In this embodiment, the material 3 is placed on a trolley,
This is carried into the clean room 4 and attached to the unwinding section 2. The clean room 4 is generally used and is of a type in which clean air filtered by a filter is circulated. Continuous web 1 is polyethylene,
Paper, aluminum foil, nylon 6, polyethylene terephthalate, polypropylene, polycarbonate or laminates thereof (wall thickness 8 to 100 μm, width 300 to 120)
0 mm) and the roll 3 has a winding diameter of 100 to 500 mmφ.

After that, the wide continuous web 1 is unwound from the web 3, guided to the slit blade 5, and slit into the continuous web 1 having a required width, and the ears of the continuous web 1 are taken up by the take-up reel 6.
To be wound up. In addition, slit continuous web 1
Is sent to the take-up unit 7 and taken up by the take-up roll 8. The slit blade 5, the winding unit 7, and the continuous web feed path are also arranged in the clean room 4. The slit blade 5 is a rotary blade or a fixed leather. The winding roll 8 is the winding unit 7.
It is supported by the winding shaft 9 of and rotates around it. In addition,
The winding shaft 9 is of a turning type. After the winding of the continuous web 1 is completed, one end of the winding shaft 9 can be removed from its support mechanism and swung horizontally around the other end.

In this slitter, the winding roll 8 is placed on the carriage 10 after the winding of the continuous web 1 is completed. Trolley 10
Is a telescopic type, and its upper surface can be raised,
It is located in the clean room 4. Therefore, when the winding shaft 9 is manually operated in the clean room 4 to rotate it by 90 °, and then the carriage 10 is expanded and contracted and the upper surface thereof is raised, the winding roll 8 is moved to the carriage 10.
Can be placed on. Then, when the carriage 10 is moved in the axial direction of the winding shaft 9, the winding roll 8 can be pulled out from the winding shaft 9. Further, the conveyor 11 and the packaging machine 12 are provided in the clean room 4, the winding roll 8 is placed on the conveyor 11, and the winding roll 8 is packaged on the conveyor 11 by the inner wrapper of the packaging machine 12, and thereafter, Packaged take-up roll 8 in clean room 4
Can be carried outside.

Further, in this slitter, the ultraviolet irradiation device 13 is provided in the continuous web feeding path between the unwinding portion 2 and the slit blade 5.
Is provided. As shown in FIGS. 3 and 4, the ultraviolet irradiation device 13 includes a large number of ultraviolet irradiation lamps 14,
Located in the clean room 4, the continuous web 1 is guided by the guide roller 15 and guided to the ultraviolet irradiation lamp 14. In this embodiment, 48 ultraviolet irradiation lamps 14
The continuous webs 1 are arranged in parallel to the rows, and the continuous webs 1 are folded back by the guide rollers 15 at both end positions of the ultraviolet irradiation lamps 14, and the continuous webs 1 are guided between the two rows of the ultraviolet irradiation lamps 14 and both sides thereof. UV irradiation lamp 14 is 20 ~
It has an ultraviolet illuminance of 40 mw / cm ² , has a length of 1300 mm, has a diameter of 50 mm φ, extends in the feeding direction of the continuous web 1, and is 20 to 50 mm from both sides of the continuous web 1.
Are placed at a distance. Therefore, continuous web 1
Irradiate both sides of the surface with ultraviolet light and the continuous web 1
Can be sterilized.

Further, an ultrasonic vibration air radiating device 16 is provided in the continuous web feeding path between the slit blade 5 and the winding portion 7. As shown in FIG. 5, the ultrasonic vibration air radiating device 16 is composed of an air ejecting portion 17 and an air suction portion 18, and is arranged in the clean room 4. The air ejecting portion 17 is for ejecting ultrasonic vibrating air. 20-80KH
It has an ultrasonic vibrator having a frequency of z and is connected to the filter 19, which is connected to the air ejection port of the blower unit 20. The air suction portion 18 is for sucking dust and air, and is connected to the filter 21. The filter 21 is connected to the air suction port of the blower unit 20. Further, in this embodiment, the continuous web 1 is folded back by the pair of guide rollers 15, and the pair of ultrasonic air emitting devices 16 are arranged so as to face the continuous web 1 on each guide roller 15. Therefore, ultrasonic vibrating air is ejected from the air ejecting portion 17 and the continuous web 1
The continuous web 1 can be removed by irradiating it to both sides of the continuous web 1 by the ultrasonic vibration air, and the dust and the air can be sucked into the air suction portion 18. The principle itself is well known, and detailed description is omitted. Further, a high-frequency ionized air radiating device 22 is provided in the continuous web feeding path between the slit blade 5 and the ultrasonic vibration air radiating device 16, and the air that crosses the electrodes is 5,000 to 20,000 Hz.
Is ionized at a high frequency of 1, and high-frequency ionized air is radiated to one or both surfaces of the continuous web 1. The air pressure is 0.5 to 4 kgf / cm ² . Therefore, the continuous web 1 is neutralized by the high frequency ionized air. The principle itself is well known, and detailed description thereof will be omitted.

Therefore, in this slitter, before the continuous web 1 is slit by the slit blade 5 in the clean room 4, the continuous web 1 is guided to the ultraviolet irradiation device 13 and both surfaces of the continuous web 1 are irradiated with ultraviolet rays. The continuous web 1 is sterilized by ultraviolet rays. Then, the sterilized continuous web 1 is slit into the continuous web 1 having a required width.

Further, when the continuous web 1 is slit, dust such as fragments thereof is generated on the continuous web 1 and the dust adheres due to static electricity. In this slitter, after the continuous web 1 is slit, the continuous web 1 has a high frequency. The high-frequency ionized air is guided to the ionized air radiating device 22 and radiated on both surfaces of the continuous web 1, and the continuous web 1 is discharged by the high-frequency ionized air. Then continuous web 1
Is guided to the ultrasonic vibration air radiating device 16, and the continuous web 1
Ultrasonic vibrating air is radiated on both surfaces of the continuous web 1 to remove dust from the continuous web 1. Therefore, even if the dust adheres due to static electricity, the dust is vibrated and separated by the ultrasonic vibration air after the static electricity is removed.
Is completely removed.

Therefore, in the clean room 4, the continuous web 1 that has been sterilized and dust-removed has the winding roll 8
To be wound up. After that, the winding roll 8 is packaged by the inner wrapper of the packaging machine 12 and is delivered to the outside of the clean room 4. Therefore, the winding roll 8 is protected by the inner wrapper and the continuous web 1 is kept in a sterilized and dust-removed state.

Therefore, the continuous web 1 of the winding roll 8
When using as a packaging material for bags or containers of foods or medicines, it is not necessary to sterilize the continuous web 1, and it can be used as it is. Tokusho Sho 6
It is not necessary to specially sterilize the bag or container after molding, unlike the devices disclosed in Japanese Patent Application Laid-Open No. 4-9218 and Japanese Patent Application Laid-Open No. 62-49853, the number of steps does not increase, and the cost is low. JP-A-61-164927 and 62-2.
Unlike the apparatus disclosed in Japanese Patent No. 71823, there is no need for special sterilization of the continuous web in the food filling process, and the problem of discoloration and odor of the continuous web does not occur. The continuous web 1 of the take-up roll 8 is rewound by an inspection rewinder,
This eliminates the need to sterilize the continuous web 1.

In the ultraviolet irradiation device 13, when both surfaces of the continuous web 1 are irradiated with ultraviolet rays, 90% of the E. coli is removed.
The above can be sterilized. In view of changes in consumer preferences such as low salinity and lightening of food and demand for long-term preservation of food, E. coli is sterilized by 99.9% or more, and salmonella, Staphylococcus aureus, Bacillus subtilis, Bacillus subtilis spores, etc. Other bacteria can be highly sterilized. For example, 20 °
In the atmosphere of C, the ultraviolet irradiation lamp 14 is arranged at a distance of 30 mm from both sides of the continuous web 1 and the maturity of 25 mW.
When ultraviolet rays are irradiated with an ultraviolet illuminance of / cm ² , various bacteria can be sterilized by 99.9% by appropriately selecting the irradiation amount of ultraviolet rays and the running speed of the continuous web 1. Table 1
Indicates the irradiation amount of the ultraviolet rays and the traveling speed of the continuous web 1.

[0022]

[Table 1]

As is clear from Table 1, for Bacillus subtilis spores, when the irradiation amount of ultraviolet rays was 33.3 mWsec / cm ² and the traveling speed of the web material 1 was 50 m / min, Bacillus subtilis The spores can be sterilized by 99.9% or more. However, if the spores can be sterilized by 90.0% or more or 99.0% or more, the irradiation amount of ultraviolet rays can be significantly reduced to reduce the running speed of the web material 1. Can be greatly increased. Table 2
Indicates the irradiation amount of the ultraviolet rays, the irradiation amount ratio, the traveling speed of the continuous web 1 and the traveling speed ratio.

[0024]

[Table 2]

When the continuous web is temporarily stopped as in the devices of JP-A-61-164927 and JP-A-62-171823, ultraviolet rays are irradiated to a specific portion of the continuous web for a predetermined time. This may cause discoloration and odor of the continuous web. The inventors of the present invention conducted an experiment on the relationship between the irradiation time of ultraviolet rays and the discoloration and odor of continuous webs. What was used in the experiment was a packaging material (No. 6) made of a laminate of white solid-printed nylon 6 (thickness 15 μm), urethane adhesive (thickness 2 μm) and linear low density polyethylene (thickness 40 μm).
1), transparent nylon 6 (wall thickness 20 μm) and ethylene
Vinyl acetate copolymer (vinyl acetate content 5% by weight, wall thickness 1
5 μm) and low density polyethylene (density 0.918 g / c
A packaging material (No. ³ ) with a laminated body of m ³ and a wall thickness of 30 μm.
2), nylon 6 (wall thickness 15 μm) and polyester polyol / polyisocyanate adhesive (wall thickness 2 μm)
), An aluminum foil (thickness 7 μm), the adhesive (thickness 2 μm) and an ethylene / vinyl acetate copolymer (vinyl acetate content 7% by weight, thickness 30 μm), a packaging material (No. 3). In the ultraviolet irradiation lamp 14 having an ultraviolet illuminance of 25 mW / cm ² , this is arranged at a distance of 30 mm from both sides of the continuous web 1, and the light is irradiated for 3 seconds (irradiation amount: 75
mW ・ sec / cm ² ), 30 sec (irradiation dose 750 mW ・ sec / cm
² ), UV irradiation was performed for 60 seconds (irradiation dose 1500 mW · sec / cm ² ) and 180 seconds (irradiation dose 4500 mW · sec / cm ² ). Table 3 shows the experimental results, and the surface is the nylon 6 side.

[0026]

[Table 3]

Further, the inventors of the present invention experimented with the sterilizing and dust removing effects of the apparatus of FIG. What was used in the experiment was a packaging material composed of a laminate of nylon 6 (wall thickness 15 μm) and ethylene / vinyl acetate copolymer (vinyl acetate content 10% by weight, wall thickness 40 μm) under the following conditions. I experimented.

(1) Slit condition Film width: 1,000 mm Number of winding rolls: Three slit width: 350 mm Maximum winding diameter: 300 mm φ

(2) Conditions in clean room Indoor cleanliness; Class 3000 humidity; 40% temperature; 20 ° C

(3) Dust removal conditions Dust removal system; Non-contact closed loop dust removal system by ultrasonic wave and high frequency static elimination system Ultrasonic frequency; 60 KHz filter; HEPA filter for 0.3μ, prefilter 25μ used Static electricity removal system; high frequency (10 1,000Hz) AC air purge method

(4) UV irradiation conditions Irradiation output: 30 mW · sec / cm ² Distance from lamp surface to film D = 10 mm Lamp used: SCG-1000EH-4P. 70W 60 lamps (30 lamps x 2 rows) Lamp mounting pitch 45 mm Operating speed: 50 m / min (833 mm / sec) UV irradiation time (one side); 2.16 sec (900 × 2/8)
33) Lamp sterilization effective length = 900 mm UV irradiation energy; 64.8 mW · sec / cm ² (30 ×
2.16) Effective UV irradiation energy; 45 mW · sec / cm ² (64.
8 x 0.7)

Table 4 shows the experimental results.

[0033]

[Table 4]

As shown in Table 4, the number of dust and the number of bacteria significantly changed before and after the treatment. The number of bacteria used in this experiment was determined by the membrane filter method.
It is a 7 ° C./48-hour culture method, the color measurement method is a color difference test method TLSZ8722 / JISZ8730, and the odor method is a sensory method.

In this embodiment, the UV irradiation device 13 is provided in the continuous web feeding path between the slitter unwinding part 2 and the slit blade 5, but instead of this, the slit blade 5 and the winding blade are wound. An ultraviolet irradiation device 13 may be provided in the continuous web feeding path between the picking portions 7, and after slitting the continuous web 1, ultraviolet rays may be irradiated to both surfaces thereof to sterilize the continuous web 1.

[0036]

As described above, according to the present invention, when the continuous web 1 of the winding roll 8 is used as a packaging material for bags or containers of food or medicine, the continuous web 1 is specially sterilized. It is not necessary and can be used as it is. Unlike the devices disclosed in JP-B-64-9218 and JP-A-62-49853, it is not necessary to sterilize the bag or the container after molding, the number of steps does not increase, and the cost is low. JP-A-61-16
Unlike the devices disclosed in Japanese Patent Nos. 4927 and 62-271823, it is not necessary to sterilize the continuous web specially in the food filling process, and there is no problem that the continuous web is discolored or smells. The continuous web 1 of the take-up roll 8 is rewound by the inspection / rewinding machine, and thereby the continuous web 1 need not be sterilized, and the intended purpose can be achieved.

[Brief description of drawings]

FIG. 1 is a side view of a slitter used in an embodiment of the present invention.

2 is a plan view of the slitter of FIG. 1. FIG.

3 is a front view of the ultraviolet irradiation device of FIG. 1. FIG.

FIG. 4 is an enlarged view of a main part of FIG.

5 is an explanatory view of the ultrasonic vibration air emitting device of FIG. 4. FIG.

[Explanation of symbols]

 1 Continuous web 2 Unwinding part 3 Raw fabric 4 Clean room 5 Slit blade 7 Winding part 8 Winding roll 13 Ultraviolet irradiation device 16 Ultrasonic vibration air emission device 22 High frequency ionized air emission device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Koji Kimura 21 Kamitoba Minami Nashiro-cho, Minami-ku, Kyoto City, Kyoto Prefecture Nishimura Mfg. Co., Ltd. (72) Mihiro Ishizaki 1 Toho-cho, Yokkaichi-shi, Mie Stock company Yokkaichi Research Institute (72) Inventor Yasushi Nishihara 1000 Kawajiri-cho, Yokkaichi-shi, Mie Mitsubishi Yuka Engineering Co., Ltd. Yokkaichi factory

Claims (3)

[Claims] 1. An unwinding part for unwinding a wide continuous web from a raw material, a slit blade for slitting the continuous web unwound from the raw material into a continuous web having a required width, and a slitted continuous web. In a slitter including a winding unit that winds up on a take-up roll, a continuous web feeding path between the unwinding unit and the slit blade or a continuous web feeding path between the slit blade and the winding unit, the continuous web of A slitter comprising an ultraviolet irradiation device for irradiating both sides with ultraviolet rays and sterilizing the continuous web with the ultraviolet rays. 2. The unwinding portion, the slit blade, the winding portion, and the continuous web feeding path are arranged in a clean room in which clean air filtered by a filter circulates. Slitter. 3. An ultrasonic vibration for radiating ultrasonic vibrating air to both surfaces of the continuous web in a continuous web feeding path between the slit blade and the winding portion, and dusting the continuous web by the ultrasonic vibrating air. An air emitting device is installed,
A high-frequency ionization air emission device that emits high-frequency ionized air to one or both sides of the continuous web in a continuous web feed path between the slit blade and the ultrasonic vibration air emission device, and eliminates static electricity from the continuous web by the high-frequency ionized air. The slitter according to claim 1, wherein the slitter is provided.