JPH06191505A - Manufacture of packaged object - Google Patents

Abstract

PURPOSE:To provide a method to continuously manufacture a stable packaged object while the packaging material at a sealed surface is not stained by an exothermic agent by a method wherein a magnetic powder-containing composition is put on the surface of a packaging material on a magnet through holes of an endless belt which has cut off holes, and the other packaging material is put on the first packaging material, and both packaging materials are sealed. CONSTITUTION:The non-hole part of an endless belt 9a on which a plurality of cut off holes are provided slides on the edge end part of the discharge port of a hopper 2. A drum-shaped rotating structure 3a has a plurality of recessed parts 4 which correspond to the shape of a heating body, with a specified interval on the whole circumference, and a heat-sealing of a packaging material is available on the surface of protruding parts 5 to form the recessed parts 4. A magnet 6 and suction port 11 are provided on the bottom of the recessed part 4, and a fixed suction chamber 10 and non-suction chamber 12 are internally provided, and the recessed part 4 communicates with either one of them depending on the rotating position. A packaging material 7 is fed to the recessed part 4, and a deprecsion 16 is formed by a suction reaction. The depression 16 is transferred to the discharge port of the hopper 2, and a specified quantity of an exothermic agent 1 is fed, and the packaging material 7 is held by the magnetic force the magnet 6 under a desired shape, and transferred to a sealing die roll 13 and covered by a packaging material 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a package in which a composition containing magnetic powder (hereinafter referred to as a magnetic powder-containing composition) is contained in a bag. The present invention relates to an endless belt having a vent hole, a package using magnetic force or magnetic force and suction force, for example, a heating element that generates heat in the presence of air, and a method for producing a bag-shaped oxygen absorber.

[0002]

2. Description of the Related Art A typical example of a magnetic powder-containing composition is a composition composed of metal powder, water, a water retention agent and an oxidation promoter. This composition utilizes the reaction between magnetic powder and oxygen. It is also used as an exothermic agent and oxygen absorber. BACKGROUND ART In recent years, a heating element in which a heat generating agent is housed in a breathable bag has become widespread as a disposable basin. As a method for producing a heating element using magnetic force, the method described in JP-A-4-2342 is known. This known method is based on a magnetic force transfer method using two magnet sheets. A heating agent is attached to one magnet sheet, and the attached matter is wrapped with another magnet sheet on which a packaging material is arranged. It is a method of manufacturing a heating element in which magnetic force is transferred onto the surface of a material and held, and another packaging material is covered and sealed.

[0003]

In place of the magnetic force transfer method, the magnetic powder-containing composition is supplied from the powder supply device to the surface of the packaging material arranged on the magnet, and when the magnetic powder-containing composition is placed on the surface of the packaging material, the sealing surface is heated by the heat generating agent. The packaging material is contaminated and a sealing failure occurs when it is sealed together with other packaging materials, so that it is difficult to stably and continuously manufacture a package. An object of the present invention is to provide a method capable of continuously producing a package stably by supplying and placing a magnetic powder-containing composition from a powder supply device on the surface of a packaging material on a magnet without being based on a magnetic transfer method. To provide.

[0004]

Means for Solving the Problems As a result of intensive studies, the present inventors have placed a magnetic powder-containing composition on a packaging material surface on a magnet through the hole of an endless belt having a cutout hole,
Then, by covering the magnetic powder-containing composition with another packaging material and sealing it, it is possible to perform sealing while maintaining a good seal surface without using a magnetic transfer method, and to stably and continuously manufacture a package. Heading, arrived at the present invention.

That is, the present invention relates to a composition containing magnetic powder.
An apparatus for placing a magnetic powder-containing composition, which is provided with a magnet, in a method for producing a package which is housed in a bag composed of a single piece of packaging material (A) and (B) (hereinafter, magnetic powder-containing composition placement (Referred to as a device), the packaging material (A) is supplied to the packaging material, the packaging material (A) is covered with an endless belt having a cutout hole, and the magnetic powder-containing composition faces the magnet through the hole from the powder feeding device. (A)
A method for producing a packaging body, which comprises feeding and placing on the surface of a sheet, separating the endless belt, covering the magnetic powder-containing composition with the other packaging material (B), and sealing both packaging materials. Is provided.

The magnetic powder-containing composition placing device may be used as an apparatus for placing a magnetic powder on the entire peripheral surface or under the entire peripheral surface, at predetermined intervals on the entire peripheral surface or under the entire peripheral surface, on the peripheral surface or under the peripheral surface. Structure in which magnets are provided in a part of the inner circumference, or magnets having suction ports are arranged at predetermined intervals on the entire peripheral surface and a suction chamber (that is, a decompression chamber) that can communicate with the suction ports is installed inside Structures are preferred. As a more preferable magnetic powder-containing composition placement device, recesses are provided at predetermined intervals on the entire circumferential surface,
A rotary structure is provided in which a magnet is provided on the bottom or the lower surface of the recess, or the bottom of the recess itself is a magnet, and a suction chamber which can communicate with the suction port provided in the recess or the magnet is internally provided. When the latter rotary structure is used, since a recess is formed in the packaging material in the recess, compared to the former rotary structure, the magnetic powder-containing composition of the magnetic powder-containing composition to the sealing portion in the packaging material sealing step of the package production. The biting is reduced, and the sealing condition of the seal portion is good. It should be noted that the degree of depression of the depression can be adjusted by the suction force. Use of such a rotating structure is suitable for high-speed continuous production of packages.

The rotating structure of the magnetic powder-containing composition placing device described above may be a belt-like rotating structure, but a drum-like rotating structure is usually preferable in order to easily provide a magnet or a suction chamber. Used in As the magnet used in the magnetic powder-containing composition placement device, either an electromagnet or a permanent magnet can be applied. Also, the recesses provided in these rotary structures,
The magnet and the suction chamber are not particularly limited in their shape or structure. If necessary, a pressing roller, a scraper, and / or a cleaning roller for cleaning the concave portion or the sealing surface of the packaging material may be attached to the magnetic powder-containing composition placing device.

Such a magnetic powder-containing composition mounting device is
In order to easily release the manufactured package from this device, it is preferable to have a mechanism for reducing or eliminating the magnetic force and / or suction force after manufacturing the package or a mechanism for applying pressure to the package. To reduce or eliminate the magnetic force, an electromagnet capable of changing the magnetic force is used as a magnet, or a magnetic force shield fixed at the rear of the device and the seal die roller at the detaching portion of the package. It can be easily achieved by providing a plate or a magnetic shielding plate. The reduction or disappearance of the suction force or the pressurization of the package is achieved by providing a non-suction chamber (normal pressure chamber or pressure chamber) together with the suction chamber. In addition, the magnetic powder-containing composition placement device is below the portion necessary for forming the package, that is, the portion from the placement of the magnetic powder-containing composition on the packaging material to the covering and sealing of the other packaging material ( If the device has a magnet that is fixed only to the inside, and the surface layer of the device rotates in contact with the magnet, the package can be removed without the mechanism for removing the package. Is achieved.

The endless belt having the cutout hole is
The shape of the holes and the thickness of the endless belt are arbitrarily determined according to the amount of the magnetic powder-containing composition placed on the packaging material and the placement position. When the surface of the magnetic powder-containing composition mounting device has a concave portion, the hole shape and thickness of the endless belt may be set in consideration of the volume of the concave portion, but the non-hole portion of the endless belt is It is necessary to transfer or rotate so as to face the protrusion. When supplying the magnetic powder-containing composition to the packaging material, the packaging material is covered with an endless belt having a cutout hole, and the magnetic powder-containing composition is placed on the packaging material through the hole, so that this endless belt is The non-hole portion protects the seal surface of the packaging material (the surface on which the magnetic powder-containing composition is not placed), and as a result, prevents the sealing surface from being contaminated by fine powder of the magnetic powder-containing composition. It is preferable that the endless belt having the feeding hole is transported or rotated so that the surface of the non-hole portion slides on the edge portion of the discharge port of the powder supply device. That is, in this case, the magnetic powder-containing composition supplied from the discharge port and placed on the packaging material through the hole is scraped off by the edge portion of the composition above the surface of the non-hole portion. Therefore, the amount can be more constant. There is no particular limitation on the attachment / detachment position of the endless belt having the cut-out holes with respect to the magnetic powder-containing composition placement device, and the transfer route after the removal from the device.

As the powder supply device, a powder supply machine, preferably a hopper provided with a sensor for detecting the accumulated amount in the hopper, is usually used in the vicinity of the discharge port.
It is preferable that the powder feeder has a structure capable of smoothly changing the physical properties of the magnetic powder-containing composition and supplying the composition smoothly. For example,
A rotary valve that alleviates the load of the magnetic powder-containing composition and quantitatively transfers the composition. In a preferable powder feeder, a rotary valve as a powder feeder and a sensor for detecting the accumulated amount in the hopper are provided in the vicinity of the discharge port, and the rotary signal is supplied by the sensor. An example is a structure in which the rotational movement of the valve is controlled to maintain the magnetic powder-containing composition in an appropriate state and perform discharge operation.

Next, as the magnetic powder-containing composition of the present invention,
(A) Magnetic metal powders such as iron powders, (b) water, (c) oxidation aids such as metal halides or sulfates, and (d) water retention such as wood powders, leeches, activated carbon, water-absorbing polymers, etc. A composition containing an agent as a main component, and further inorganic components as a hydrogen generation inhibitor and a binder as a compounding aid in the components (a) to (d).
Alternatively, a composition to which a surfactant or the like as an impregnation aid is added may be used. Preferably, a composition comprising at least iron powder, water, a metal halide and activated carbon is used as an exothermic agent or an oxygen scavenger.

When the magnetic powder-containing composition is an exothermic agent or an oxygen scavenger, the two packaging materials which are covered and sealed to form a package are selected from a non-breathable packaging material and a breathable packaging material. , At least one is made of breathable packaging material.

The breathable packaging materials include (a) non-woven fabrics, (b) porous sheets (trade name NF sheet (manufactured by Tokuyama Soda), trade name Serpore (manufactured by Sekisui Chemical), trade name Breathlon ( Nitto Denko) etc.) or a laminated sheet of porous sheets and non-woven fabric
Breathable sheet (trade name: Tyvek (manufactured by DuPont)) made by stacking polyethylene and polyethylene fibers and heating and pressing
(C) A laminated sheet obtained by laminating a non-woven fabric with a plastic film and mechanically perforated with a blade or the like, or (d) a non-woven fabric or a porous sheet with a plastic film provided with ventilation holes in advance. Laminated ones are applied.

The non-breathable packaging material may be a conventional composite packaging material having an inner surface made of polyethylene film or the like, but when the packaging body is a heating element, the heating element is attached to and held on the outer surface of the packaging material. Those provided with a pressure-sensitive adhesive layer and a release packaging material are preferably used. Further, in the case where the seal strength is not required so much, an adhesive layer may be provided on the inner surface of the packaging material.

Examples of the method for sealing both packaging materials include a heat sealing method, an adhesive method, and a combination of both methods.

[0016]

EXAMPLES Next, preferred examples of the method of the present invention will be described with reference to the drawings in the case of using an exothermic agent as a magnetic powder-containing composition. FIG. 1 shows that a hopper 2 capable of sealing nitrogen is used as a powder supplying device in the manufacturing method of the present invention.
Drum-shaped rotating structure 3 as magnetic powder-containing composition mounting device
It is a schematic sectional drawing which shows the manufacturing method of a heat generating body when a is used.

A rotary valve (reference numeral omitted) is provided inside the discharge port of the hopper 2. As shown in FIG. 2, the endless belt 9a having the cutout holes is an endless belt having a plurality of cutout holes 20 at predetermined intervals. Further, the non-hole portion 21 slides on the edge portion (reference numeral omitted) of the discharge port of the hopper 2.

The drum-shaped rotary structure 3a has a plurality of concave portions 4 formed on the entire peripheral surface at predetermined intervals to accommodate the shape of the heating element.
The surface of the protrusion 5 forming the recess 4 enables heat sealing of the packaging material, the magnet 6 (permanent magnet) and the suction port 11 are provided at the bottom of the recess 4, and the fixed suction chamber 10 and non-suction chamber 12 are provided.
In which the concave portion 4 has a suction chamber 10 and a non-suction chamber 1
It is a rotating structure which is circumscribed by 2 and rotates. Therefore, when the drum-shaped rotary structure 3a rotates, the suction port 11 communicates with either the suction chamber 10 or the non-suction chamber 12 depending on the rotation position.

First, the packaging material (A) 7 is supplied to the concave portion 4 of the drum-shaped rotary structure 3a which rotates clockwise, and the suction port 11 is provided.
The concave portion 16 is formed in the packaging material (A) 7 by the suction action of the suction chamber 10 via the. The endless belt 9a having the unrolling hole is reversely attached so that the non-hole portion 21 and the hole 20 thereof face the protrusion 5 and the recess 4 of the drum-shaped rotary structure 3a via the packaging material (A) 7, respectively. Rotate clockwise. The recessed portion 16 of the packaging material (A) 7 is transferred to the discharge port of the hopper 2, and a predetermined amount of the heat generating agent 1 is supplied from the discharge port to the recessed portion 16 and placed on the discharge hole 20 of the endless belt 9a. . The placed heating agent 1 is held in a desired shape by the magnetic force of the magnet 6 and the suction action. Then, after the endless belt 9a is separated from the exothermic agent 1 held in this way, the exothermic agent is transferred to the seal die roll 13, covered with the packaging material (B) 8, and sealed by the seal die roll. Thus, the heating element sheet 15 is manufactured. Then, this heating element sheet reaches the non-suction chamber 12 and separates from the drum-shaped rotary structure 3a, and is then cut by the cutting roller 14 to obtain the separated heating element. In addition, in order to immediately cut the produced heating element sheet 15 and obtain a separated heating element, the cutting roller 1
4 may be adjacent to the magnetic powder-containing composition mounting device. The endless belt 9a can also be rotated via a cleaning machine.

FIG. 3 is a schematic sectional view showing another embodiment of the present invention. The powder supply device is the same as that in the above embodiment. Endless belt 9b having a cutout hole
Is the same as the above embodiment except that the thickness is made thicker than that of the above embodiment. Further, the non-hole portion 21 slides on the edge portion (reference numeral omitted) of the discharge port of the hopper 2.

The drum-shaped rotary structure 3b is embedded on the entire peripheral surface at a predetermined interval and has a magnet 6 adapted to the shape of the heating element.
A rotary structure having a plurality of (permanent magnets) and capable of heat-sealing a packaging material on a non-embedded surface (reference numeral omitted). First, the drum-shaped rotary structure 3 that rotates clockwise
b, the packaging material (A) 7 is supplied, and the thick endless belt 9b having a cutout hole is formed on the non-hole portion 21 and the hole 2 thereof.
Rotation is performed counterclockwise such that 0 faces the non-embedded surface (non-magnet portion) of the drum-shaped rotary structure 3b and the magnet 6 via the packaging material (A) 7, respectively. The packaging material (A) 7 is transferred to the discharge port of the hopper 2, and a predetermined amount of the exothermic agent 1 is supplied from the discharge port to a portion of the packaging material (A) 7 which is in contact with the magnet 6 through the delivery hole 20 of the endless belt 9b. And place it. The placed heat generating agent 1 is held in a desired shape by the magnetic force of the magnet 6. Then, the exothermic agent 1 held in this way
And wiper the respective surfaces of the endless belt 9b.
The endless belt 9b is conditioned by 18 and then the heat generating agent is transferred to the seal die roll 13 and the packaging material (B) 8
Then, the heating die sheet 15 is manufactured by sealing with the sealing die roll. Then, this heating element sheet reaches the magnetic force shielding curved plate 17 and reaches the drum-shaped rotating structure 3b.
After being separated from the sheet, it is cut by the cutting roller 14 to obtain the separated heating element. The detached endless belt 9b is rotated via the cleaner 19.

[0022]

According to the manufacturing method of the present invention, the magnetic powder-containing composition is placed on the surface of the packaging material from the powder supply device through the hole of the endless belt having the drawing hole. While maintaining a good surface, it is sealed with other packaging materials, and a package can be stably and continuously manufactured.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an embodiment of a manufacturing method of the present invention.

FIG. 2 is a partial plan view showing an example of an endless belt having a cutout hole of the present invention.

FIG. 3 is a schematic cross-sectional view showing another embodiment of the manufacturing method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exothermic agent 2 Hoppers 3a, 3b Drum-shaped rotating structure 4 Recessed portion 5 Projection portion 6 Magnet 7 Packaging material A 8 Packaging material B 9a, 9b Endless belt 10 having a feeding hole 10 Suction chamber 11 Suction port 12 Non-suction chamber 13 Seal Die roll 14 Cut roller 15 Heating element sheet 16 Recessed portion 17 Magnetic force shielding curved plate 18 Wiper 19 Cleaning machine 20 Pull-out hole 21 Non-hole portion

Claims (7)

[Claims] 1. A method for producing a package comprising a magnetic powder-containing composition (hereinafter referred to as a magnetic powder-containing composition) contained in a bag composed of two packaging materials (A) and (B). The packaging material (A) is supplied to a device provided with a magnet for placing a magnetic powder-containing composition (hereinafter referred to as a magnetic powder-containing composition placement device),
The packaging material (A) is covered with an endless belt having a delivery hole, and the magnetic powder-containing composition is supplied from the powder supply device to the surface of the packaging material (A) facing the magnet through the hole, and placed on the packaging material (A). After removing the belt, the other packaging material (B) is covered with the magnetic powder-containing composition, and both packaging materials are sealed. 2. The method for producing a package according to claim 1, wherein the magnetic powder-containing composition placing device is a rotating structure having a magnet or a magnet and a suction hole provided on a peripheral surface or a lower portion thereof. 3. The method for producing a package according to claim 2, wherein the magnet or the magnet and the suction hole are arranged at the bottom of a recess provided on the peripheral surface. 4. A magnetic powder-containing composition mounting device, wherein the magnetic force and / or
Or a mechanism for reducing or eliminating the suction force.
4. The method for producing a package according to any one of 3 to 3. 5. The method for producing a package according to claim 1, wherein the surface of the non-hole portion of the endless belt having the cut-out hole slides on the edge of the discharge port of the powder supply device. 6. The method for producing a package according to claim 1, wherein the magnetic powder-containing composition is an exothermic agent containing iron powder and generating heat in the presence of air. 7. The method for producing a package according to claim 1, wherein the magnetic powder-containing composition is an oxygen scavenger containing iron powder.