JP5207849B2 - Packing method for compressed filter tow packing body and packing body thereof - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing method and a packing body of a compressed body of a filamentous body, a tow, and a filter tow of a filament, and relates to a packing method of a packing body that is packed by a joining method such as a seal after being compressed. It is.

  In particular, in a packing body that is made of cellulose acetate filter tow and the contents are compressed and packed by a pressing means such as a press, the packing form is suppressed by sealing the repulsive internal pressure generated by compressing the contents. It is about.

A filamentous body, a tow, a filament, etc. have a low bulk density. For example pressure, such as pressing upon the filament packing in consideration of the handling of held horizontally when the filter tow consisting of filaments of cellulose acetate are bulk density is processed into filter small transport efficiency and tobacco and 100 Kg / m ³ approximately It is compressed by means and packed in a bulk density of 300 to 600 kg / m ³ . Such a package is called a bale (toe bale).

A filter toe bale packaging method and packaging apparatus are described in WO 02 / 32,238 A2 as a bale compression apparatus (bale packaging apparatus). According to the technique described in this document, the produced filter tow is sprinkled into a so-called filling container (filling can) as a continuous filamentous body. In this state, the filter tow in the filling container has a very bulky form. Next, the contents put in this filling container are pressurized up and down and compressed. After compression, the compressed body of the filter tow is packed with a packing material in a state under the compressive stress. The packing material is, for example, a sheet of cardboard, corrugated paper, non-woven fabric, plastic film, synthetic fiber or the like.
And these packing materials cover each surface of the compression body of a filter tow with each packing material. These packing materials are bound by an iron or plastic band (these are referred to as binding bands) so that the tow bale will not rupture due to the repulsive force of the filter tow bale when the pressure of the filter tow compression body is removed. The package form was used. That is, the rebound internal pressure of the remaining filter tow was held by this binding band.

Thus, the press compression pressure of the highly compressed bale reaches 5000 kPa (500 t / m ² ) at the maximum, and even if the compression pressure is low, it does not fall below 1000 kPa (100 t / m ² ).
For this reason, as described above, a repulsive internal pressure of 20 kPa to 400 kPa remains in the package of the filter tow due to the stress repelling compression as described above. In order to obtain a package that can withstand such a repulsive internal pressure, the filter tow package has conventionally been bound by a binding band made of a metal or plastic band.
The binding band integrates the packaging material and the press bale. In the conventional technique, in an ordinary packing body, the abdominal packing material and the ceiling or bottom packing material are integrated by a binding band. As a result, the tow veil can be prevented from rupturing. However, with the expansion of the tow veil, a portion other than the portion of the binding band that cannot be expanded expands. As a result, the binding band bites into the surface layer of the filter tow, and the tow veil is constricted. Since the filter tow is partially compressed by the high pressure at the constricted portion, there is a possibility that when the filter tow is taken out as a continuous filament, the filter tow may break at that portion. Further, it is necessary to cut the binding band at the time of unpacking. However, there is a risk that the operator may be injured because the binding band cut at this time will fly off.

For this reason, the packing form which omits a binding band was examined. For example, in DE 76-U35849 (Patent Document 1), in order to improve the problem of filter tow bundling due to these bands, a compressed filter tow is packaged with a packing material and pasted with an adhesive applied to the packing material. A matching package is disclosed. In this case, the repulsive pressure of the tow bale is applied to the packaging material.
For this reason, according to this patent, the compressed filter tow is wrapped with a laminated aluminum PP and paper inside and bonded to the outside with a solvent-type adhesive, specifically a solvent-type adhesive of chloroprene rubber. A package that is wrapped in cardboard is described.

  Japanese Patent Application Laid-Open No. 7-215338 (Patent Document 2) discloses a technique for joining a top part and a central part of a collection container using a hook-and-loop fastener tape without using an adhesive. This technology includes several upright side parts that surround the perimeter of the collection container and delimit the boundary. This side part can withstand repulsive internal pressure without a binding band. That is, in the side part of this package, a surface fastener exists between the side part and the collection container, and the surface fastener is always crimped and firmly bonded by the repulsive internal pressure of the collection container. On the other hand, the side parts are required to have rigidity and strength that can withstand the repulsive internal pressure of the collection container, and the packaging form becomes large and the cost is high. For this reason, these packaging bodies cannot be applied to one-way packaging and can be used only within a range in which the packaging material can be collected and reused.

Japanese National Patent Publication No. 9-508880 (Patent Document 3) discloses a hermetic packaging using a plastic film or sheet. Hereinafter, the description will be made with a three-sheet packaging in which three sheets of a top part, a bottom part, and a trunk part are packed. That is, in the case of this packaging, the packaging material section provided so as to be wound around the abdomen is pulled out from the roll of the packaging material to the required length, closed at the end, and closed in the vertical direction by the bottom and the top. The packaging form which surrounds a press bale so that it may comprise and is welded is disclosed. And it is described that a binding band can be abbreviate | omitted if it is this packing form.
In this package, after the bale is compressed, the body part is formed by winding a film, and the bottom part and the top part need to be set in a bale compression device in advance. And to seal, 9 sides (4 sides of the top and torso, 4 sides of the bottom and torso, 1 side of the end of the torso) must be joined with a seal etc. There was a problem that work efficiency was low.

  British Patent No. 1280932 (Patent Document 4) discloses a bale package comprising two parts, a relatively deep bag base portion and a relatively shallow bag cap portion. Both bags are stocked and fed to a bale press. The relatively shallow cap portion forms the bottom of the bale, and the relatively deep base portion forms the top portion and the trunk portion. A bulky tow is pushed into the base by a plunger and compressed. A bale is disclosed in which the base portion and the cap portion are continuously welded (sealed) (sealed all around).

In the case of this technique, it is necessary to mold the bag base portion in advance. In this case, the molding of the bag base portion has a problem that a large-scale device is required to adapt to a large packaging size. Further, the filter tow is inserted into the compression can as a pre-compressed continuous lump of filamentous material, but after the bag base is installed in the compression can, the lump body is inserted in the compression process. There is also a problem that the bag base portion may be detached from the installation portion due to friction at the time. And after molding this bag base part, in order to install the bag base part in the compression can without gap, the bag base part has the same cross-sectional shape of the upper part and the lower part, and can be stacked and stored or transported It was not possible, and storage efficiency and transportation efficiency were low, which was a problem in work.

  In Japanese translations of PCT publication No. 2005-528096 (Patent Document 5), in the above-mentioned Patent Document 3 and Patent Document 4, a means such as a vacuum pump is used to deaerate the inside of the bale to make the internal pressure of the bale negative. A technique for smoothing the surface is disclosed. According to this document, the air inside the bale is degassed before sealing in the above-mentioned Patent Document 3, and as described in the above-mentioned Patent Documents 3 to 5, it is made of a plastic sheet or film. A method has been proposed in which the package is heat sealed to seal the package, and a negative pressure is generated inside the bale to balance the atmospheric pressure and the rebound internal pressure of the bale to suppress the expansion of the bale. As described in Patent Document 5, after the filter tow in a compressed state is packaged with a packing material and hermetically sealed, the external pressure applied to the packed material is released.

As a result, the material expands under the action of its own elastic restoring force inside the package. As the capacity of the package increases, negative pressure is generated within the range packed with the packing material. As for the size of the package, a negative pressure is generated within the range surrounded by the packaging material as the capacity of the compressed package increases. The size of the package is such that the compressed filter tow cannot be fully expanded, i.e. the filter tow inside the wrapping material remains compressed to a certain degree inside the package after its partial expansion. It is described that the selection is preferable. Thus, when deaeration is performed, in order to prevent the compressed body of the filter tow from expanding completely, it is performed for the purpose of eliminating excess air inside the package.

US Publication No. US2004 / 0159658 (Patent Document 6) discloses a tow packing system in which an exhaust hole (evacuator) is provided in a three-piece structure or a two-piece structure packing body. In this document, two films are used on the top and bottom, and the four sides are heat-sealed to create a package that envelops the bale greatly, and by removing excess air from the evacuator, airtight packaging is achieved. A technique for suppressing excessive expansion of the bale is disclosed. In such a packing form, when placing and sealing two films so that they are sandwiched from above and below the bale, it is easy to cover the bale with the packing material, but on the other hand, the packing material (film) after packing the bale Since a large amount of surplus part is formed, the amount of air brought in increases. For this reason, generation of negative pressure due to natural expansion of the bale cannot be expected, and it is necessary to remove air with a vacuum pump or the like in order to discharge excess air inside the packing material and generate negative pressure. And since the amount of air to be deaerated is large, work efficiency is also poor.
In addition, it is necessary to facilitate a special packaging material provided with an evacuator, and there is a problem that the cost of the packaging material is high.

Furthermore, in addition to the problem of workability, there is a problem that since the film after packing is largely left, the remaining part must be stored neatly. If the storage of the surplus part of the film is not good, the part becomes an obstacle to loading and transporting the bale, or the surplus part of the film rubs, causing pinholes, causing the internal pressure to be lost and the bale to expand. It may become.
DE 76-U35849 JP-A-7-215338 Japanese National Patent Publication No. 9-508880 British Patent 1280932 Special Table 2005-528096 US Publication No. US2004 / 0159658

The problem to be solved is that the filaments, tows, filaments, etc. have low bulk density, and are packed with high rebound internal pressure because they are packed and compressed. There is no problem and there is no packaging that is easy to handle and a convenient packaging method for obtaining such a packaging.
That is, as a packaging form that eliminates the conventional binding band, a method of hermetically packing the entire circumference by a method such as heat sealing using a three-piece packing material has been disclosed, but in this method, at least nine sides are heat sealed. The packing work is complicated. Although a method of hermetically packing four sides using a two-piece packing material has been disclosed, in this method, processing of an excess portion of the packing material becomes a problem. Although a specially shaped two-piece packing material with one side open is pre-molded, and a packing method in the form of inserting a pre-compressed tow filament mass after being placed in a compression can is proposed, A special device for molding a special two-piece packing material for packing a large bale was required and lacked versatility.

  Another problem to be solved is to make a two-piece packing material from a general-purpose film by a simple method, and to install the packing material in a compression can so that the two-piece packing material is not transferred to the tow filament. There is a method of packing a filter tow in a compressed state after compression of the material with a two-piece packing material and sealing it with a two-piece packing material with less excess air inside the packaged material. There is no point.

As a result of studying the above problems, the present inventors have made a bottom film in a trapezoidal shape in advance in a package having a large repulsive internal pressure such as a package body in which filaments, tows, and filaments are compressed. The bag on the bottom side is installed in a folded state on the lower base of the compression can of the bale compression device. In addition, the top lid is placed on the upper base of the compression can.
Next, instead of sprinkling the tow filament into this bag, it is sprinkled into a normal compression can to form a bulky tow filament bale. The bale is compressed by the upper base and the lower base of the compression can. (The press veil is used.) Then, the bag folded on the lower base of the compression can is delivered to the compressed filter tow, and the filter tow (press bale) in the compressed state is put on the bottom bag by covering it. Store easily.
The inventors have found that by sealing four sides of the bottom bag and the lid placed on the upper base, it is possible to easily achieve airtight packaging with a small excess capacity with only four sides of the seal, and arrived at the present invention.

  Inventors of the present invention make bags in the lower base by making the size of the upper opening of the bag-made product larger than the size of the bottom (bottom side) of the bag-made product. The present inventors have found that the work of unfolding and covering the folded bag can be easily performed, and have arrived at the present invention.

  The size of the bale in the present invention depends on the inner dimensions of the freight container that transports the bale (the size of the loadable space), the bale weight, the bale packing density, etc., but the width is about 700 mm to 1100 mm, and is long. It is about 900mm to 1200mm. The height is about 900 mm to 1200 mm, which are appropriately combined and selected so that the loading efficiency to the container is the best. The bottom size of the bag size on the bottom side may be adjusted to this bale size. The bottom size of the bag on the bottom side is slightly stretched by the elasticity of the film, so it may be 10 mm to 30 mm (about 1% to 3%), preferably about 10 mm to 20 mm smaller than the bale size.

The bale weight of the present invention is preferably 400 kg or more and 1200 kg or less. Particularly preferably, it is 500 kg or more and 1000 kg or less. If it is less than 400 kg, the packing weight is insufficient and the loading efficiency is lowered. Also, if it exceeds 1200Kg, if you try to make the packing density about 700kg / m ³ , the size of the compressed bale will become too large, making it difficult to cover the bag, and trying to keep the bale size to about 1.6m ³ Then the packing density becomes too high.

(Bottom side bag)
In the present invention, the bottom side bag installed on the lower base needs to be molded in advance into the shape of the bag. And the molded bottom side bag is installed in the lower part (it may be an upper part depending on the case) of a toe veil compression device. The compression bale can be covered with a bottom bag drawn from the lower (or upper) base on the compression bale after the tow bale compression step. In order to cover the compressed tow veil with the bottom bag, the bottom bag needs to be a deformed rectangular parallelepiped. In other words, it is necessary that the upper surface is the cuboid of deformation with the upper surface being the upper surface and the upper surface being open. That is, the side projection in the state where the bottom side bag is raised in a three-dimensional shape has a shape spreading toward the upper surface.

  The size of the bottom bag is important in order to create this shape. That is, the upper size of the bottom side bag needs to be larger than the lower size. Thus, by making the upper size larger than the lower size, the bag fed from the lower base as described above can be easily put on the bale in a compressed state. The size of the upper size relative to the lower size is 105% to 120%, preferably 107% to 118%. More preferably, it is 110% to 115%. In addition, it is preferable to secure a length from 40 mm to 180 mm, preferably from 60 mm to 160 mm, particularly preferably from 80 mm to 140 mm, as the size in which the upper size is larger than the lower size.

  That is, the upper size which is larger than the lower size becomes a surplus portion when the compressed bale is covered with a packaging material, the four sides are heat-sealed and sealed, and the compression force of the bale is released. At the same time, this surplus portion is a cutting allowance for unpacking the bale. Therefore, when the upper size is larger than the lower size, when the size is smaller than 40 mm, the cutting allowance becomes too small, and the unpacking property becomes worse than the packing property. That is, there is a possibility of contact with the contents of the bale when the film is cut. Since the content of the bale is a continuous thread-like tow, if the cutter comes into contact, the continuous thread-like body may break, which may cause a trouble in the process of winding up the filter rod.

On the other hand, if it exceeds 180 mm, there will be more surplus parts after being packed in the packing material.In the present invention, the packing material is packed, sealed, and not degassed. However, if a surplus portion of the packing material becomes too large, it is difficult to suppress the bale from excessively expanding until a negative pressure is generated inside the bale.
The bottom bag in the present invention can be easily manufactured by sealing two films. In other words, after overlapping two sheets of packaging material, cut the three sides into a dimension that is the sum of the width and length of the upper size and the width and length of the lower size and seal To do. Thereafter, the mouth on one side that is not sealed is opened and folded to a predetermined height. The bag is raised in a rectangular parallelepiped (more precisely, a modified hexahedron with different upper and lower sizes). By starting up, a folded portion (boat bottom portion) is generated in the side surface portion of the bottom side. By further sealing the ship bottom portion generated by this folding so as to form the bottom of the side surface, the folded portion forms a rectangular bottom of a rectangular parallelepiped.

In the case of this bag-made product, a sealed three-way seal bag is produced in which a seal portion is generated at the center (center line) of the side surface and the bottom surface, and further, a seal portion is also generated at the joint portion between the side surface and the bottom surface. In the folded state, the bag has a gusset on the side. An example of a three-side sealed bag making product is shown in FIG. In addition, in the state of FIG. 1, it is only sealed three-way and the folding part of the ship bottom part has not been sealed yet. Further, FIG. 2 shows an example of a bag-making product in which the bottom surface of the bag-made product is folded, the bottom of the ship is sealed, and the extra ship-bottom is removed, and the side and the bottom of the boat are folded.
Moreover, the bottom side bag of this invention can also be manufactured with a normal large sized bag making machine. In this case, the film is first unwound to make a cylindrical bag (body). Any part may be used as long as the body part can be formed. However, a cylindrical bag (body material) is preferably formed by sealing the end of the half-folded material film. Next, a roller is applied to both sides of this cylindrical material (body) to make a gusset (folding part). In the case of a normal bag-made product, the upper size and the lower size are the same, so it can be left as it is. However, in the case of the bottom side bag of the present invention, the upper size and the lower size are different. The gusset portion is sealed at an angle in the film flow direction, and then cut parallel to the seal portion. A fusing seal may be used as long as sufficient sealing strength can be obtained depending on the layer structure and thickness of the film. In this way, a body portion having a different upper size and lower size is manufactured.

Next, this body is preferably moved to a “push-off device” using a “Thomson blade”, leaving one piece of film (for example 250 microns) on the lower base, and “one piece of neck skin left” The body will be in the state of " The trunk connected in this state moves on the bag making machine and moves to the next step.
In the next step, the film connected in a state where “one piece of skin on the neck” has moved to a slightly higher position and then moved down again. In this lowered state, the bottom of the body is folded by forming a lower gusset (folding) part by sucking the front side of the body with a “vacuum pad” from the direction of travel of the body and opening the mouth. Insert the bottom material by inserting the material from above.
After that, seal the bottom material and the body part, and cut it to the specified size, the bottom pouch of the box pouch is completed. In this case, in the square bottom bag industry, the bag is a bag having a shape in which all eight sides are sealed, called a top-attached seal bag. This bag is also called a square bottom gusset bag, and in the folded state, it can be stored in the same area as the front projection unit, and can be stacked and stored and moved.

  If the bottom-side bag is the above-described top-sealed seal bag, all 12 sides of the bale package can be used as the seal portion in the state where the packed bale is finished and the bale packaging is finished. And if the corners of such a bale are used as a seal part, when unpacking the bale, the bale packing material can be peeled off by peeling the seal by hand, making the unpacking operation easy. This is preferable because it can be performed.

A developed view of the bottom side bag is shown in FIG. A folded view is shown in FIG. In the folded view of FIG. 2, since the bottom surface and a part of the side surfaces are folded in a single layer, a large size is required as the size of the bag-made product, but the thickness can be reduced. In the folded view of FIG. 4, the bottom surface is overlapped with four sheets, and the film overlaps with the side gusset for a total of eight films.
The seal in the bottom side bag making of the present invention is not particularly limited. Heat sealing or ultrasonic sealing may be used. If sufficient strength is obtained, it may be bonded with an adhesive. Preferably, heat sealing is preferred. The heat seal may be a line seal or a spot seal. The seal surface may be a seal surface in which a groove in the seal width direction (longitudinal direction) is formed, or may be a so-called grid seal surface.

The seal width can be appropriately set in the range of 3 to 15 mm, but preferably a seal width of 5 to 10 mm is preferable. If the bottom side bag of the top-sealed seal is used when the seal width is wide, it will be difficult to peel the seal part by hand at the time of unpacking, so the unpacking property will be worse, and conversely if the seal part width is too narrow When a compressed tow bale is packaged and the compressive force of the tow bale is disclosed, the seal portion may possibly break due to the tow bale expansion force.
In the bottom bag, it is effective to cut out the upper corners of the apex formed by the front and side surfaces and the rear and side surfaces into a triangle having a size of about 20 mm to 40 mm. In this way, when the bottom bag is covered with a compressed bale and sealed with the top sheet, the bottom bag and the top sheet can be easily sealed. The notch is illustrated in the circle shown in FIG. When notch is not formed, when sealing the top opening of the bottom bag with the top sheet, the bottom bag is easier to wrinkle, which may cause a seal leak. .

(Set the bottom bag to the bale packing machine)
Hereinafter, a method for setting the bottom bag to the bale packing machine will be described. The bottom bag is set on the lower base of the bale packing machine. The lower and upper bases move up and down inside the compression can of the bale packing machine. For this reason, after the bottom bag is set on the lower base compression surface, the bottom surface of the bottom bag covers the compression surface of the lower base. The bottom bag may be folded back so that the front and back sides (the inner surface and the outer surface of the bag) are reversed, or may be folded and stored compactly on the side surface of the lower base. In the case of the bottom side bag of the present invention, the upper size and the lower size of the bag are different, and the upper size is larger, so that the bag can be easily folded or folded. Sectional views of an example in which the bottom bag of the present invention is set on the lower base are shown in FIGS.
FIG. 7 shows an image before the compression veil is covered with the bottom bag of the present invention and sealed with the top sheet. FIG. 7 is an image diagram. Actually, the compression bale starts to expand immediately when the pressure of the compressor is released, so there is no compression bale that is stable in the shape of a rectangular parallelepiped when no pressure is applied. .

(Top sheet)
In the present invention, the top packing material does not need to be molded. It may be a simple sheet. Accordingly, any shape and size may be used as long as the compression surface of the upper compression base of the bale packing machine can be covered. However, from the viewpoint that no extra packing material is generated in the bale after packing, it is preferable to cut and use a rectangular shape having a size obtained by adding the paste margin of the seal portion to the upper size of the bottom bag. The size of the adhesive margin is about 20 mm to 60 mm, preferably about 30 mm to 40 mm.

(Set the top sheet to the bale packing machine)
Since the top sheet is obtained by cutting the film as described above, it may be fixed to the compression surface of the upper base of the bale packing machine with a double-sided tape or an adhesive tape-like one. Alternatively, a part of the side surface of the upper base may be folded, and the side surface of the upper base may be fastened with a contraction band such as a rubber tube. In any case, it is sufficient that the top sheet is installed on the compression surface of the upper base of the bale packing machine.

(Bale packing)
As described above, the bottom bag is set on the lower base of the bale packing machine. A top sheet is installed on the compression surface of the upper base of the bale packing machine. These upper and lower bases move through the compression can of the bale packing machine, and an uncompressed filter tow is placed between the upper and lower bases. Next, the upper base and the lower base move to compress the filter tow. The compression between the upper base and the lower base is performed until a predetermined pressure is reached, and then the upper base and the lower base move the compression can while the compressed press bale remains compressed. To get out of the compression can. At this stage, the top and bottom of the press bale are sandwiched between the bases, but the side faces are exposed.
Compression pressure of the press veil 100 t / m ² or more, preferably at a pressure of 200~500t / m ² is applied. The press bale is compressed by this high compression pressure, and becomes a pressed bale in a compressed state.

  At this stage, the bottom-side bag set on the lower base is fed out and covered with a compressed press bale. Next, the four sides of the top base sheet and bottom bag of the upper base are sealed. Sealing ensures the airtightness of the press bale. Then, at the stage where the compressive force of the upper base and the lower base of the bale packing machine is released, the press bale expands due to the stress repelling compression in the filter tow packing. However, in the case of the present invention, a sufficiently tight packing form can be applied to the press bale without particularly deaeration, so the amount of excess air in the press bale packing is small and the height of the bale is high. Is expanded to about 100 mm (about 10% as a ratio to the height of the bale), the inside of the bale becomes negative pressure, and the expansion of the bale stops by balancing with the atmospheric pressure. And this shape can be maintained.

(Material of bottom bag and top sheet)
The material of the bottom side bag and the top side sheet needs to be airtight. In this case, the gas tightness does not necessarily require gas barrier properties. Therefore, even a plastic film having a normal oxygen permeability can be suitably used. As the plastic film, there are a single layer film and a multilayer film, and even a single layer film can be used, but a multilayer film can be preferably used. A suitable sheet material is a multilayer film, and at least the outermost layer is preferably polyolefin, and particularly preferably polyethylene (PE). Among the polyethylenes, low density polyethylene (LD) is preferable, and LLDPE (linear low density polyethylene) is particularly preferable. The total thickness of these films may be 150 μm to 350 μm, preferably 200 μm to 270 μm. These film layer configurations may be a layer configuration having four or more layers, or a layer configuration having a barrier layer.

A multilayer film having a two-layer or three-layer structure is preferable. As a particularly preferred layer structure, a layer structure such as PE / EVA / PE with an ethylene vinyl acetate copolymer (EVA) as the central layer is preferable, and a layer structure of PE / PA / PE with polyamide (PA) as the central layer Is preferred.
It is preferably composed of LLDPE / EVA / LLDPE. The layer structure is preferably symmetrical. In particular, in the case of LLDPE / EVA / LLDPE, the thickness of each layer may be LLDPE / EVA / LLDPE = 80-100 / 30-70 / 8-100 (μm). The PE / EVA / PE layer-constituting film can be produced by extruding and laminating EVA between two 80-100 μm films.

  Printing is done on the LLDPE film and then the printing surface is laminated so that the printing ink does not directly touch the tow veil. A PE / PA / PE layered film can be manufactured by dry laminating a PE film on a PA film. The PA film may be a stretched film. When a film having a three-layer structure or more using a stretched PA film is used, the film can be kept moderately, which is suitable for bag making operations.

  By making the bottom side film in advance, the seal length in the press bale packing process was reduced by about 50% to 70%, so productivity was improved. Furthermore, since the bag has a trapezoidal shape, an extra fin portion is not formed when sealing is completed as compared with the two-piece, so that “appearance” is good and pinholes are not caused. And since there is little surplus air in a press bale and expansion | swelling when a press plate is open | released after completion | finish of packing without performing deaeration in particular, "appearance" is good. Furthermore, folding workability and workability improved when the bag was attached to the packing machine. And by making the bottom side bag into a trapezoidal shape, the film is properly removed from the bale, and when the bale is opened, the bag is difficult to contact the toe, so the `` openability '' can be improved while maintaining the bale surface state .

Hereinafter, the present invention will be described in more detail based on preferred embodiments with reference to the drawings.
A LDPE / EVA / LDPE multilayer film (thickness 250 μm) obtained by extrusion lamination with EVA using a commercially available # 100 (thickness 100 μm) LDPE film as a packaging material for packing the veil was used. This film was used as the three-sided seal bag shown in FIG. That is, as for the size of the bottom side bag, the width of the lower part is 1100 mm and the depth is 980 mm. The upper width is 1220 mm and the depth is 1100 mm. The size of the upper size relative to the lower size is 110% in width and 112% in depth. The height of the bottom bag is 1000 mm.

Next, the filter tow produced in a filling container (filling can) as described in WO 02 / 32,238 A2 was sprinkled as a continuous filament. The size of the filling container was 1130 mm wide and 990 mm deep. The filter tow in the filling container was extremely bulky and the height was 4000 mm. The bottom bag was installed on the lower base of the bale packing machine, and the top sheet was installed on the upper base. Next, the filter tow placed in the filling container was pressurized by a pressure of 150 kg / cm ² with the upper and lower bases and compressed. The height of the press bale while maintaining the compressed pressure was 870 mm.

  With the press base sandwiched between the upper and lower bases, the press bale was discharged from the lower part of the compression vessel while keeping the distance between the upper and lower bases at 870 mm, which is the height of the press bale. The press base was sandwiched between the upper and lower bases, and the side surface of the press bale was exposed. After that, the bottom side bag stored in the lower base was taken out and moved up to the upper base. The bottom side bag and the top side sheet in contact with the upper surface of the upper base press base were overlapped. At this stage, there was no need to evacuate any air in the bale pack. Next, heat sealing was performed over the entire four sides of the top and bottom.

Then, the pressure of the upper and lower bases was released. The press bale started to expand as soon as the pressure was released, and the expansion stopped when the height reached 950 mm. The bale weight was 500 kg. That is, the bale expanded about 80 mm in the height direction. However, the top surface (top surface, top surface, top surface) of the bale was smooth and had no curved surface. In the bale that has been inflated (hereinafter, this bale is referred to as a packing bale), the seal portion of the bottom bag and the top sheet has moved from the top of the bail to a portion of about 40 mm.
The packaging veil was stored for 3 weeks, and the state of deformation of the bale was examined. Stored flat in a warehouse with general environmental conditions and examined for height changes. With a storage period of 3 weeks, the height was 980 mm and the increase in height was 40 mm. Further, no significant swelling occurred on the upper surface. The upper surface of the packing bale maintained a smooth surface, and the packing bale could be stacked in multiple stages.

  Next, the packing veil was unpacked. The portion sealing the bottom bag and the top sheet was pulled, and the front and side edges of the packing bale were pulled out. This part is an overlapping part of about 40mm above the packing bale, and this part is processed so that the blade does not touch the contents directly like the product name carton cutter (manufactured by Trusco Nakayama Co., Ltd.) TSD-259B Using a cut cutter, it was cut to the bottom of the packing bale. Next, the bottom side bag and the vicinity of the seal portion of the top sheet were cut open once in the lateral direction of the packing veil, and the packing material of the packing bale was cut into two pieces. In the case of the packaging material of the present invention, since there is a space between the packaging material and the bail above the packaging bale, these operations can be performed efficiently. Next, the remaining three sides of the front and side sides of the packing veil were similarly cut to the bottom of the packing bale.

  The packing material of the packing bale was in a state where the packing material on the upper surface portion of the packing bale was removed, and the packing material was cut into four surfaces, the front surface and the side surface, and the filter toe bale hoisting operation could proceed smoothly. FIG. 8 shows an overhead view at the stage where the bottom side bag and the top sheet are sealed and the front and side edges of the packing bale are pulled out.

(Comparative example)
Next, a bottom-side bag that was not a modified trapezoidal bag as in the present invention was used. That is, as in the previous example, a commercially available LDPE / EVA / LDPE multilayer film (thickness 250 μm) obtained by extrusion lamination with EVA using # 100 (thickness 100 μm) LDPE film was used. It was. This film was a three-sided seal bag. However, as for the size of the bottom side bag, the width of the lower part is 1100 mm and the depth is 980 mm. The upper width is 1100mm and the depth is 980mm. That is, it is a normal three-side sealed bag in which the size of the upper size of the upper portion and the lower portion of the bottom side bag with respect to the lower size is the same. Similar to the example, the bottom side bag was installed on the lower base of the bale packing machine, and the top sheet was installed on the upper base. It took a considerable amount of time to fold the bottom bag on the lower base of the compressed air, and the fold portion had a protrusion from the base as compared with the example. Next, the filter tow placed in the filling container was pressurized by a pressure of 150 kg / cm ² with the upper and lower bases and compressed. The height of the press bale while maintaining the compressed pressure was 870 mm.

  After that, the bottom side bag stored in the lower base was taken out and moved up to the upper base. The bottom side bag and the top side sheet in contact with the upper surface of the upper base press base were overlapped. At this stage, there was no need to evacuate any air in the bale pack. Next, heat sealing was performed over the entire four sides of the top and bottom. Then, the pressure of the upper and lower bases was released. The press bale started to expand as soon as the pressure was released, and expansion did not stop even when the height reached 950 mm. It continued to expand and reached a height of about 1100 mm. The top surface of the bale had a rounded expansion. When the sealing property of the bale was examined, a hole of about 10 mm was formed in the upper corner of the bottom bag. This is presumed to be a hole caused by friction or bending when the lower base moves in the compression container when the lower base compresses the filter tow with the bottom bag installed on the lower base. It was done.

  The following example is an embodiment in which the shape of the bottom bag itself is a deformed trapezoid, but the degree of deformation is not sufficient. Similarly to the previous example, a multilayer film (thickness 250 μm) of LDPE / EVA / LDPE obtained by extrusion lamination with EVA using a commercially available # 100 (thickness 100 μm) LDPE film was used. This film was used as the three-sided seal bag shown in FIG. That is, as for the size of the bottom side bag, the width of the lower part is 1100 mm and the depth is 980 mm. The upper width is 1145 mm and the depth is 1020 mm. The size of the upper size relative to the lower size is 104% in width and 104% in depth. The height of the bottom bag is 1000 mm.

Using this bottom bag, the bottom bag was installed on the lower base of the bale packing machine and the top sheet was installed on the upper base in the same manner as in the example. Although it was relatively easy to fold the bottom-side bag on the lower base of the compressed air, the folding portion had a protrusion from the base as compared with the example. Next, the filter tow placed in the filling container was pressurized by a pressure of 150 kg / cm ² with the upper and lower bases and compressed. The height of the press bale while maintaining the compressed pressure was 870 mm.

After that, the bottom side bag stored in the lower base was taken out and moved up to the upper base. The bottom side bag and the top side sheet in contact with the upper surface of the upper base press base were overlapped. Even in this embodiment, there was still a hole in the bottom side bag that was thought to have occurred when the lower base was compressing the filter tow, and the expansion of the bale could not be stopped.

  The following example is an embodiment in which the shape of the bottom bag itself is a deformed trapezoid, but the degree of deformation is excessive. Similarly to the previous example, a multilayer film (thickness 250 μm) of LDPE / EVA / LDPE obtained by extrusion lamination with EVA using a commercially available # 100 (thickness 100 μm) LDPE film was used. This film was used as the three-sided seal bag shown in FIG. That is, as for the size of the bottom side bag, the width of the lower part is 1100 mm and the depth is 980 mm. The top width is 1375 mm and the depth is 1235 mm. The size of the upper size relative to the lower size is 125% in width and 125% in depth. The height of the bottom bag is 1000 mm. Using this bottom bag, the bottom bag was installed on the lower base of the bale packing machine and the top sheet was installed on the upper base in the same manner as in the example.

Similar to the example, the bottom side bag was installed on the lower base of the bale packing machine, and the top sheet was installed on the upper base. The bottom bag was easily folded into the lower base of the compressed air, and there was no protrusion from the lower base. Next, the filter tow placed in the filling container was pressurized by a pressure of 150 kg / cm ² with the upper and lower bases and compressed. The height of the press bale while maintaining the compressed pressure was 870 mm.
After that, the bottom side bag stored in the lower base was taken out and moved up to the upper base. The bottom side bag and the top side sheet in contact with the upper surface of the upper base press base were overlapped.

  Next, heat sealing was performed over the entire four sides of the top and bottom. However, since there was an excessive volume in the bottom side bag, excess air was present in the packing veil at the stage where the seal seal was finished. Then, the pressure of the upper and lower bases was released. The press bale started to expand as soon as the pressure was released, and expansion did not stop even when the height reached 950 mm. It continued to expand and stopped at a height of about 1100 mm. When the sealing property of the veil was examined, no holes were confirmed. For this reason, it is presumed that the expansion of the bale could not be suppressed because the air remaining inside the packing bale hardly generates a large negative pressure that balances with the expansion force of the bale even when the packing bale expands.

An example of a three-side sealed bag-making product according to the present invention. The example of the bag-making goods of the state which folded the bottom face of the bag-making goods which carried out the three-side seal which concerns on this invention, sealed the ship bottom part, removed the excess ship bottom part, and folded the side surface and the ship bottom part. Development view of a bag with a shape sealed on all eight sides, called a top-sealed seal bag according to the present invention The example of the bag-making goods of the state which the top-attached seal | sticker bag (a side surface, bottom fold gusset bag) which concerns on this invention was folded. Sectional view when the bottom bag of the present invention is set on the lower base Sectional view when the bottom bag of the present invention is set on the lower base Image before the compression bale is covered with the bottom bag of the present invention and sealed with the top sheet The top view in the stage which pulled out the seal part of a bottom side bag and a top sheet, and pulled out the surplus part of the side which consists of a front and a side surface in order to unpack the packing bale of the present invention.

Claims (4)

(A) In the apparatus for compressing the filter tow, a step of installing a bag-like bottom bag and a lid-like top sheet on the upper and lower bases of the compressor, respectively;
(B) compressing the filter tow with the device;
(C) covering the compressed filter tow veil with a bag-like bottom bag;
(D) sealing the bottom bag and the top sheet in an airtight state;
(E) in the process of packing the filter tow veil comprising the step of releasing the compression pressure of the compressed filter tow after sealing;
Filter tow bale packing process where the top size of the bottom bag is 105% to 120% larger than the bottom size. The bale packing process according to claim 1, wherein the bottom size of the bottom side bag is 40mm to 90mm larger than the bottom size. The bale packing process according to claim 2, wherein the bottom side bag is a top-sealed seal bag. A filter tow bale packed by the packing method according to claim 1.

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