JP7427868B2 - Double packaging bag with spout for textile ink and bag-in-box using it - Google Patents

Description

The present invention relates to a packaging bag for storing a large volume of liquid, and a packaging bag with a spout for textile ink used in bag-in-boxes and the like.

Packaging bags alone are not strong enough to withstand shocks such as drops when used as containers for storing large amounts of liquid. Therefore, a bag-in-box was devised, in which a packaging bag with a strong base material layer is placed inside an outer box made of cardboard or the like.
The packaging bag used in this bag-in-box is composed of a laminated film having a base material layer having strong strength and a sealant layer that facilitates fusing the films together.

In order to manufacture the above-mentioned laminated film, for example, in Patent Document 1,
An infeed roll that feeds a sheet-like continuous bag in which a large number of flat bags with spouts are connected through perforations in a low and predetermined inclined attitude towards the feed direction; A first swing feed table and a second swing feed table that alternately receive the most advanced bags of the continuous bags in substantially the same inclination position as the predetermined inclination position, and a bag clamp provided on the first and second swing feed tables. a mechanism for changing the posture of the first and second swing feed tables alternately between an inclined posture and a horizontal posture; A width direction movement mechanism that moves alternately to one side and the other side, and either one of the first and second swing feed tables clamps the most advanced bag of the continuous bag using a bag clamp mechanism. a bag cutter section provided near and above the upper ends of the first and second swing feed tables for cutting the leading edge bag from the continuous bag as a single bag through perforations when changing the posture to a horizontal posture; While clamping one bag, pull out each single bag on the first or second swing feed table that moves to one side or the other after being changed to a horizontal position and passes under the infeed roll. a first drawer slide unit and a second drawer slide unit that alternately turn and feed each other; a first elevating and lowering conveying table and a second elevating and lowering conveying table that support and carry out each pulled out single bag; , a first filling unit and a second filling unit that alternately fill the single bags pulled out onto the second elevating conveyance table with contents; A first carry-out conveyor and a second carry-out conveyor are lowered by a second elevating conveyor table, turned back and carried out, and are carried out alternately passing below the first and second swing feed tables, and a first carry-out conveyor and a second carry-out conveyor are carried out alternately and Once the single bags falling alternately from one side and the other side in the width direction of the end of the second carry-out conveyor are received, the bags are moved directly above the cardboard case supplied to the middle part of the carry-out conveyor, and the case is moved to the middle of the carry-out conveyor. A bag-in-box bag filling and storage device is proposed, which is characterized by being provided with a widthwise movable bag shooter for storing a single bag therein.

In this way, to form a filled storage bag, the laminated film or storage bag is moved vertically and horizontally on a machine, such as by sliding it on a swing feed table, passing it through a roll, or moving it with a slide unit. A process is necessary.
In such a process, since the film contains an organic lubricant, high productivity is achieved by providing slipperiness when it comes into contact with machines such as sailors.

Furthermore, Patent Document 2 discloses a double-bag type packaging bag consisting of two types of plastic films: a composite film consisting of a base film and a sealant film, and a single sealant film, and the bag is continuous through perforations. In the inner bag for bag-in-box, which is connected to We have proposed an inner bag for a bag-in-box, which is characterized in that the film structure on the side to which the spout on the other side is not welded consists only of a single sealant film.

The bag-in-box inner bag of Patent Document 2 is made into a double-bag type packaging bag to accommodate large-capacity contents, and is a packaging bag for continuous filling that is continuously connected at perforations. This is a bag-in-box packaging bag that is easy to assemble by putting it in an outer box.
However, similar to Patent Document 1, organic lubricants are added to these base materials to ensure processability such as folding with a sailor, bending, and making gussets after forming into a film. By containing it, it is possible to obtain high productivity by providing slipperiness when coming into contact with machines such as sailors.

However, for example, if a packaging bag contains an organic lubricant such as erucic acid amide and the contents are textile ink, etc., when the contents come into contact with the packaging bag, the lubricant causes the contents to aggregate. Such problems were occurring.
In order to deal with problems such as the film material that makes up the packaging bag changing the quality of the contents, if the lubricant is removed, the film will not slip on the sailor and will become jammed or wrinkled and will not retain its shape. There were problems such as not being able to do things properly, resulting in a significant drop in productivity.

Patent No. 2738240 Japanese Patent Application Publication No. 20007-238129

Therefore, it is an object of the present invention to provide a packaging bag that does not contain an organic lubricant in the film that comes into contact with the contents and that can be processed into a packaging bag.

The double packaging bag with a spout for textile ink of the present invention has textile ink as the content, and is made of an inner packaging laminate comprising, in order from the content side, a first sealant layer, an inner packaging base material layer, and a second sealant layer. an inner packaging bag, an outer packaging bag that stores the inner packaging bag, and an outer packaging bag consisting of an outer packaging laminate including a third sealant layer and an outer packaging base material layer in order from the inner packaging bag side, and an inner packaging bag. A double packaging bag consisting of a bag and a spout attached to an opening penetrating the outer packaging bag, wherein the first sealant layer and the second sealant layer contain an inorganic lubricant and an organic lubricant. It does not contain a lubricant, and the arithmetic mean roughness of the surface of the second sealant layer is 0.5 μm or more and 1.5 μm or less.

The double-wrapped bag with a spout of the present invention does not use an organic lubricant in the inner packaging bag that comes into contact with the contents, so even if the contents contain textile ink, etc., problems such as aggregation due to the lubricant may occur. does not occur.
In addition, by setting the surface of the second sealant layer on the outer surface of the inner packaging bag to an arithmetic mean roughness of 0.5 μm or more and 1.5 μm or less, smoothness on sailors or rollers can be obtained, and processability into packaging bags can be obtained. Therefore, high productivity can be ensured.

This is an example of the double packaging bag with a spout of the present invention, and it is a perspective view thereof and a sectional view in which a cap is fitted. FIG. 2 is a configuration diagram of a packaging laminate of a double packaging bag with a spout according to the present invention. It is a longitudinal cross-sectional view showing an example of a spout and a cap used in the double packaging bag with a spout of the present invention. FIG. 2 is a perspective view and a sectional view of the double-packaged bag with a spout before filling, which is another example of the double-wrapped bag with a spout of the present invention, which is manufactured in Examples and Comparative Examples.

EMBODIMENT OF THE INVENTION Hereinafter, the embodiment of the double packaging bag with a spout of the present invention will be described in detail using the drawings.
FIG. 1 shows an example of a double packaging bag with a spout 1 according to the present invention, showing a perspective view thereof and a sectional view showing a cap 4 fitted to the spout 3.
As shown in FIG. 1-1, the double packaging bag 1 with a spout of the present invention comprises a double packaging bag 2 formed into a bag shape with a film, and a spout fused between the film forming the packaging bag. It is formed from 3. In this figure, the double packaging bag 2 is a packaging bag with four sides sealed, but it may also be a packaging bag with one side of the inner packaging bag 21 and the outer packaging bag 22 folded and sealed on three sides. do not have.

As shown in FIG. 1-2, the double packaging bag 2 is composed of an inner packaging bag 21 that stores the contents 5, and an outer packaging bag 22 that stores the inner packaging bag 21.
At the side seal part 11 on the periphery of the double packaging bag 2, the side seal parts of the inner packaging bag 21 and the outer packaging bag 22 are fused together at the same time, leaving a gap between the inner packaging bag 21 and the outer packaging bag 22. , and forms an air layer 23.
Further, an opening 12 passing through the inner packaging bag 21 and the outer packaging bag 22 is provided, and the plug 3 is inserted into the opening 12. Then, the fusion flange 31 of the spout 3 is fused to the inner surface of the inner packaging bag 21 around the opening, and at the same time, the inner surface of the outer periphery of the opening of the outer packaging bag 22 is fused to the outer surface of the periphery of the opening of the inner packaging bag 21. are doing.

FIG. 2 is a configuration diagram of a packaging laminate of a double packaging bag with a spout according to the present invention.
The inner packaging bag 21 is composed of an inner packaging laminate 210 that includes at least an inner packaging base material layer 211, a first sealant layer 213 covering the front and back sides of the inner packaging base material layer 211, and a second sealant layer 212. Further, the outer packaging bag 22 is composed of an outer packaging laminate 220 having at least an outer packaging base material layer 221 and a third sealant layer 222.

The inner packaging base material layer 211 and the outer packaging base material layer 221 used in the inner packaging bag 21 and the outer packaging bag 22 are preferably biaxially stretched polyamide resin films.
By using a biaxially stretched polyamide resin film with high flexibility as the base material layer, it becomes difficult to break due to impact such as dropping.
In particular, when used as a base material for an inner bag for a bag-in-box that encloses a liquid, it becomes a packaging bag that easily fits inside the box along with the outer box.
The polyamide resins used include 6-nylon, 6,6-nylon, 11-nylon, 12-nylon, 6-, 6,6-copolymerized nylon, 6-, 10-copolymerized nylon, 6-, Copolymerized nylon such as 12-copolymerized nylon can be used.
If it is thinner than 10 μm, it will easily stretch and break due to impact, and if it is thicker than 30 μm, it will lose its flexibility, so the thickness is preferably in the range of 10 to 30 μm.

Furthermore, the base material layer may be provided with a vapor deposited layer of a metal such as aluminum or a metal oxide such as silicon oxide or alumina (aluminum oxide), or a coat layer of polyvinylidene chloride or the like.
By providing such a vapor deposited layer or coating layer, high barrier properties can be obtained, and long-term storage can be achieved even for contents that are susceptible to oxidative deterioration.
At the same time, it can also improve barrier properties against water and fragrance.

Further, the resin used for the sealant layers such as the first sealant layer 213, the second sealant layer 212, and the third sealant layer 222 is low-density polyethylene with a density of 0.89 to 0.93 g/cm ³ or a linear resin. Low density polyethylene is preferred.
When used for the outer layer of an outer packaging laminate, the thickness is preferably 30 to 50 μm.
When used for the third sealant layer of the outer packaging laminate, the thickness is preferably 40 to 70 μm.
When used for the first sealant layer of an inner packaging laminate, the preferred range is 50 to 100 μm. The above-mentioned low-density polyethylene or linear low-density polyethylene not only provides strong fusion strength, but also has low reactivity with the contents and is unlikely to cause problems such as deterioration.

Here, the first sealant layer 213 and the second sealant layer 212 of the inner packaging bag are sealant layers that do not contain an organic lubricant.
When the contents are textile ink, etc., if a sealant layer containing a lubricant such as erucic acid amide is used as the packaging bag, problems such as the contents clumping together due to the lubricant may occur. It was occurring. The lubricant is a material that has the property of easily penetrating inside the olefin resin used in the sealant layer, so if it is contained inside the sealant layer, it has the problem of easily reacting with the contents.
In response to problems such as the film material that makes up packaging bags altering the quality of the contents, if the lubricant is removed, the film will not slip on the surface of the sailor etc. that comes into contact with the bag making machine and will become clogged. This caused problems such as the paper being full of wrinkles and not being able to maintain its shape, resulting in a significant drop in productivity.

As a method of obtaining slipperiness without using an organic lubricant, the present inventor has solved the problem by roughening the surface of the second sealant layer 212, which is the outer surface of the inner packaging bag, into a mat-like unevenness. I discovered that.
The roughness can be formed by, for example, molding a molten resin extruded into a film using a T-die by sandwiching it between a silicone roll whose surface has been processed into a matte state and a cooling roll and pressing them against each other.
Alternatively, a method of roughening the surface into a matte state using an inorganic lubricant such as inorganic silica or zeolite may be used.
By creating matte-like unevenness, an air layer is created between the sealant layer and the parts of processing machines such as sailors, and the air acts as a lubricant and moves with the product, significantly reducing the coefficient of friction. can be done.
If the arithmetic mean roughness is less than 0.5 μm, it is not possible to create an air layer, which significantly reduces slipperiness, causing twisting between the outer packaging laminate and the inner packaging laminate, and causing wrinkles in the product. , when coming into contact with rollers, sailors, etc., problems occur such as sticking, pulsating, and wrinkles.
Furthermore, if the arithmetic mean roughness exceeds 1.5 μm, problems such as the laminate slipping away from the processing machine, air entering during fusion, and failure to obtain stable fusion tend to occur.
For this reason, the unevenness of this surface is made to have an arithmetic mean roughness of 0.5 μm or more and 1.5 μm or less.

The packaging laminate used in the double-packed bag with a spout of the present invention can be laminated using a general dry laminating machine, an extruder laminating machine, or the like.
In addition, in order to form a double-wrapped bag with a spout, the inner packaging laminate and the outer packaging laminate are overlapped and opened, a spout is fused to the opening, and then a four-sided seal is applied. , a three-sided seal, or a part folded inward to form a gusset, and the fusion can be manufactured by a general heat sealing method, impulse sealing method, or the like.

To attach a spout, first, with the front inner packaging laminate and outer packaging laminate stacked on top of each other, a hole is first punched at a predetermined position using a press, a rotary punching blade, or the like. Then, a spout is inserted from inside the opening, and the upper surface of the flange of the spout and the first sealant surface are fused together to form a front film.

Although the packaging bag of the present invention is as described above, the front film, the rear film, and the bottom intermediate film may be replaced with a single film, and the film may be folded at the bottom intermediate film portion.

Furthermore, the resin used for the spout is a thermoplastic resin that can be fused at low temperatures, is rigid, easily retains its shape, and has a strength that allows it to fit with the cap. For example, high-pressure low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ethylene/propylene copolymer, polypropylene, ethylene/vinyl acetate copolymer, ethylene/methacrylic acid copolymer, ethylene - Possible resins include acrylic acid copolymer and ethylene/ethyl acrylate copolymer.

Examples of the present invention will be described below.

<Example 1>
As the outer packaging laminate, from the outside, linear low-density polyethylene film 50 μm / alumina vapor deposited 6-nylon 15 μm / linear low-density polyethylene film 55 μm, and each of the front and back linear low-density polyethylene films is coated with an organic lubricant. The composition contained 500 ppm of erucic acid amide.
In addition, as an inner packaging laminate, from the outside, a 40 μm linear low-density polyethylene film was prepared with an average arithmetic roughness of 0.5 μm using a semi-matte roll with a silicone surface that was roughened during film formation. /Alumina vapor deposited 6-nylon 15 μm/Linear low density polyethylene film 55 μm. However, a resin to which no organic lubricant was added was used for each of the front and back linear low-density polyethylene films.
The outer packaging laminate and the inner packaging laminate were passed through a slit with a width of 600 mm and wound into a roll to create one roll film each.
The spout 3 was injection molded from medium density polyethylene into the shape shown in FIG.
With the front inner packaging laminate and outer packaging laminate overlapped, a hole is made at a predetermined position using a press die, and the spout 3 is inserted from inside the opened opening 12, and the fusion flange of the spout is inserted. The upper surface of 31 and the first sealant surface were fused together, and at the same time, the inner packaging laminate 21 and the outer packaging laminate 22 were sealed at the same position.
The inner packaging laminate and the outer packaging laminate on the front side were each folded at the center of the width using a sailor to form a four-layer stacked state with a width of 300 mm.
The two sides of the right side seal portion 11 opposite to the left side 13 of the fold line and the bottom side 14 were fused together to create a double packaging bag 1 with a spout having the shape shown in FIG. 4.
After filling ink as contents from the unsealed upper side 15, the bags were fused in the width direction at a position of 400 mm in the unwinding direction, and the outside was cut to create 10 packaging bags each having an internal capacity of 3 L.
In total, six sets of measurement pieces measuring 80 mm in the width direction and 200 mm in the machine direction were collected for friction coefficient measurement.

<Example 2>
The inner packaging laminate uses a 40 μm linear low-density polyethylene film on the surface of which a second sealant film has been created with a surface average arithmetic roughness of 1.3 μm using a completely matte roll, and other outer packaging laminates Ten packaging bags were made with the same configuration as in Example 1, including the mouth plugs and the like.
In total, six sets of measurement pieces measuring 80 mm in the width direction and 200 mm in the machine direction were collected for friction coefficient measurement.

<Comparative example 1>
The inner packaging laminate uses a 40 μm linear low-density polyethylene film on which a second sealant film has been created using a mirror roll to give an average surface arithmetic roughness of 0.1 μm, and other outer packaging laminates and Ten packaging bags were made with the same configuration as in Example 1, including the spout.
In total, six sets of measurement pieces measuring 80 mm in the width direction and 200 mm in the machine direction were collected for friction coefficient measurement.

<Comparative example 2>
The inner packaging laminate uses a 40 μm linear low-density polyethylene film on which a second sealant film has been created using a double mat roll to have an average surface arithmetic roughness of 1.6 μm, and other outer packaging laminates are used. Ten packaging bags were made with the same configuration as in Example 1, including the mouth plugs and the like.
In total, six sets of measurement pieces measuring 80 mm in the width direction and 200 mm in the machine direction were collected for friction coefficient measurement.

<Evaluation method>
<Measurement of average roughness> Measurement was carried out optically using a VK-200 laser microscope manufactured by Keyence Corporation at a magnification of 400 times.

<Measurement of Static Friction Coefficient> In accordance with JIS K 7125, three sets of measurements were carried out on the surfaces of the second sealant films of the inner packaging laminate, with the surfaces of the second sealant films overlapped in the film running direction.

<Measurement of Dynamic Friction Coefficient> In accordance with JIS K 7125, three sets of measurements were performed on the surfaces of the second sealant films of the inner packaging laminate, with the surfaces of the second sealant films overlapped in the film running direction.

<Evaluation of bag-making suitability> The bags were actually made into a bag-making machine on a bag-in-box production line to confirm and evaluate whether there were any problems with productivity.

<Evaluation results>
Both Comparative Example 1 with low roughness and Comparative Example 2 with high roughness had a static friction coefficient and a dynamic friction coefficient greater than 1. In Example 1 with a roughness of 0.5 μm and Example 2 with a roughness of 1.3 μm, the static friction coefficient and the dynamic friction coefficient were 1 or less.
Regarding bag-making suitability, when the average arithmetic roughness of Comparative Example 1 was 0.1 μm, twisting occurred between the outer packaging laminate and the inner packaging laminate, and wrinkles occurred in the product. It also adhered to rollers and sailors, causing pulsation.
When the average arithmetic roughness of Comparative Example 2 was 1.6 μm, the bending position was shifted and a sealing failure occurred, and a problem occurred in which air was trapped in the sealing portion.
However, in Examples 1 and 2, such problems did not occur, and it was confirmed that bag manufacturing could be performed stably.

From the above results, stable production is possible if the average arithmetic roughness of the second sealant surface of the inner packaging laminate is set to 0.5 μm or more and 1.3 μm or less, and a plug made of a sealant layer without lubricant can be produced. You can get double packaging bags.

The double packaging bag with a spout of the present invention as described above does not use an organic lubricant in the inner packaging bag that comes into contact with the contents, so even if the contents contain printing ink, etc. , problems such as agglomeration due to lubricants do not occur.
In addition, by setting the surface of the second sealant layer on the outer surface of the inner packaging bag to an arithmetic mean roughness of 0.5 μm or more and 1.5 μm or less, appropriate slipperiness on sailors or rollers can be obtained, making it suitable for machining into packaging bags. can be obtained and high productivity can be ensured.
Furthermore, when the double-wrapped bag with a spout is packed in a bag-in-box, the present invention has many advantages, such as being resistant to shocks such as dropping.

1...Double packaging bag with spout 11...Side seal portion 12...Opening 13...Left side 14... ...Lower side 15...Top side 2...Double packaging bag 21...Inner packaging bag 210...Inner packaging laminate 211 ...Inner packaging base material layer 212...Second sealant layer 213...First sealant layer 22...Outer packaging bag 220... - Outer packaging laminate 221... Outer packaging base material layer 222... Third sealant layer 23... Air layer 3... Spout 31・・・・・・Fusion flange 4・・・・・・Cap 5・・・・・・Contents

Claims (4)

An inner packaging bag consisting of an inner packaging laminate containing a textile ink as a content and comprising, in order from the content side, a first sealant layer, an inner packaging base material layer, and a second sealant layer;
an outer packaging bag for storing the inner packaging bag, the outer packaging bag comprising an outer packaging laminate including a third sealant layer and an outer packaging base material layer in order from the inner packaging bag side;
A double packaging bag comprising a spout attached to an opening penetrating the inner packaging bag and the outer packaging bag,
The first sealant layer and the second sealant layer contain an inorganic lubricant and do not contain an organic lubricant,
A double packaging bag with a spout for textile ink , characterized in that the arithmetic mean roughness of the surface of the second sealant layer is 0.5 μm or more and 1.5 μm or less. The inner packaging base layer and the outer packaging base layer include biaxially stretched polyamide,
2. The printing ink- equipped two-piece with a spout for textile ink according to claim 1, wherein the first sealant layer, the second sealant layer, and the third sealant layer are made of either low-density polyethylene or linear low-density polyolefin. Heavy packaging bag. 3. The printing ink-equipped two-piece with a spout for textile ink according to claim 1 or 2, wherein at least one of the inner packaging base material layer and the outer packaging base material layer is provided with a vapor-deposited layer of a metal or a metal oxide. Heavy packaging bag. The double packaging bag with a spout for textile ink according to any one of claims 1 to 3 is stored in an outer box, and the outer surface of the double packaging bag with a spout is fixed to the inner surface of the outer box. Features a bag-in-box.

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