JP6451944B2 - Package - Google Patents

Description

  The present invention relates to a package, and more particularly, to a package in which a bag is filled with a liquid material, a powdery material, or a viscous material.

  Generally, industrial and commercial liquids, powders, mucilages, etc. are distributed as sealed packages filled in a bag-like container, and the weight of the package is several kg to 20 kg. May reach. Such heavy objects that cannot hold the shape of the contents themselves are greatly affected by impact in the distribution process, and the bags used as containers of this type of package have high resistance to damage in order to prevent damage in the distribution process. It is desired to have impact properties.

For example, Patent Document 1 discloses a bag formed from a laminated film in which linear low density polyethylene films and the like are laminated.
The bag body of patent document 1 is improved in impact resistance so that the breakage in a distribution process can be prevented.

JP 2002-36462 A

  However, the bag body of Patent Document 1 requires the use of a blade such as a knife to open the package body because the laminated film forming the bag body has a high tensile strength due to improved impact resistance. When opening using a cutter, there exists a problem that the cut end of the laminated | multilayer film which forms a bag body may mix in the to-be-filled object taken out from the package.

  This invention was made in order to solve such a conventional problem, and it aims at providing the package which can be opened without using a cutter, while preventing the failure | damage in a distribution process. To do.

A packaging body according to the present invention is formed of a laminated film having at least a base material layer and a sealant layer, and is arranged so that the sealant layer is exposed inside, and the bag body is filled and sealed. Provided with the fluidized filling material and an opening groove formed on the outer surface of the bag body without reaching the inside of the sealant layer, and the bag body has a substantially cylindrical shape extending in the axial direction. The to-be-filled material is a heavy object that cannot hold the shape, and the opening groove is arranged in the axial direction so that both ends of the opening groove are located on the inner side of the bag body in the circumferential direction. The laminated film extends from the vicinity of the center by a predetermined length, and the laminated film has a tensile strength of 20 to 30 N / 15 mm in the portion having the opening groove, and is opened when a certain external force is applied to the bag body. The bag tears from the groove Ri in which the filling material is taken out.
Further, another package according to the present invention is formed of a laminated film having at least a base material layer and a sealant layer and disposed so that the sealant layer is exposed inside, and inside the bag body The laminated film has heat shrinkage that is filled and sealed, and has fluidity to be filled and a groove for opening formed on the outer surface of the bag body without reaching the inside of the sealant layer. It is a film, and the filling material is a heavy object that cannot hold the shape, and the bag body expresses a predetermined substantially cylindrical shape together with the filling material by shrinking the laminated film by heat treatment after sealing the filling material. The opening groove has a predetermined length in the circumferential direction from the vicinity of the center of the substantially cylindrical shape in the circumferential direction so that both ends of the opening groove are located on the inner side than both ends of the bag body in the circumferential direction of the bag body. Stretched and laminated film The portion having the groove for opening after shrinkage has a tensile strength of 20 to 30 N / 15 mm, and the bag body is torn from the groove for opening by applying an external force of a certain level or more to the bag body. It is what

The filling material is preferably a heavy product up to 20 kg.
Moreover, it is preferable that the substantially cylindrical shape has a value in the axial direction that is 1.5 to 5 times as long as the length in the width direction orthogonal to the axial direction.
The bag body can be configured to tear from the opening groove by applying an external force so as to displace the both end portions of the substantially cylindrical shape in the axial direction relative to the center portion.

The opening groove may be formed from a single continuous groove portion over a predetermined length, or may be formed from a plurality of groove portions arranged within a predetermined length range.
Further, the opening groove can be formed by irradiating the surface of the laminated film with laser light, or may be formed before the bag is filled with an object to be filled.
As the filling material, a viscous material, a liquid material or a powdery material can be used.

  According to this invention, the package body is formed of a laminated film having at least a base material layer and a sealant layer, and is disposed in such a manner that the sealant layer is exposed to the inside. Equipped with a sealed filling material with fluidity and a groove for opening formed on the outer surface of the bag body without reaching the inside of the sealant layer, and for opening by applying a certain external force to the bag body Since the bag body is torn from the groove, it can be opened without using a blade while preventing breakage in the distribution process.

It is a top view which shows the package which concerns on Embodiment 1 of this invention. 3 is a side view showing the package according to Embodiment 1. FIG. 3 is a partial enlarged cross-sectional view of a package according to Embodiment 1. FIG. It is a top view which shows the package body before and behind shrinkage | contraction of a bag body. 3 is a plan view showing a method for opening a package according to Embodiment 1. FIG. It is a top view which shows the state by which the package which concerns on Embodiment 1 was opened. 10 is a plan view showing a package according to Embodiment 3. FIG. 6 is a partially enlarged cross-sectional view of a package according to Embodiment 4. FIG. It is a top view which shows the test piece of the tensile test of a laminated film. (A)-(F) are top views which show the various aspects of the groove | channel arrange | positioned at the test piece of the tension test of a laminated film. It is a graph which shows the result of the tension test of a laminated film.

Embodiment 1 of the present invention will be described below with reference to the accompanying drawings.
1 is a plan view showing a package 11 according to Embodiment 1. FIG. This package 11 is a product in which a bag 12 is filled with a paste-like material such as jam or peanut cream, which is used in manufacturing a large number of confectionery breads, cooking breads, etc., and sealed. Used for transporting various filling materials. Accordingly, the bag body 12 is required to have high strength and high impact resistance in order to prevent the bag body 12 from being damaged by an impact received by the packaging body 11 during the distribution process. At the same time, the bag body 12 is required to have high sealing performance and airtightness in order to prevent the surrounding material from being affected by the surrounding environment.

  The bag 12 has a substantially cylindrical shape extending in the central axis C direction, and the length in the central axis C direction is set longer than the length in the width direction orthogonal to the central axis C direction. When viewed from the direction of the central axis C of the bag body 12, the bag body 12 has an elliptical shape as shown in FIG. As shown in FIG. 1, an opening groove 13 is formed on the outer surface of the bag body 12 so as to be disposed near the center of the bag body 12 in the direction of the central axis C and to extend in the circumferential direction of a substantially cylindrical shape. The opening groove 13 is formed in a single straight line having a predetermined length L.

  FIG. 3 is a partial cross-sectional view taken along the direction of the central axis C of a portion having the opening groove 13 of the bag body 12 filled and sealed with a filling material 14 made of a paste-like material. The bag 12 is formed from a laminated film 15, and an opening groove 13 is formed on the outer surface A of the laminated film 15, while the filling material 14 is in close contact with the inner surface B of the laminated film 15. The laminated film 15 is a heat-shrinkable film that shrinks when heated, and is formed from a base material layer 16 and a sealant layer 17. The base material layer 16 is disposed so as to be exposed on the outer surface A of the bag body 12. Is disposed so as to be exposed to the inner surface B of the bag body 12 and to be in close contact with the filling material 14.

  The base material layer 16 of the laminated film 15 is formed of a material having excellent strength and high impact resistance in order to prevent the bag body 12 from being damaged in the distribution process of the package body 11. The sealant layer 17 is formed of a material that can be heat-bonded (heat-sealed) to seal the filling material 14 filled in the bag body 12. The base material layer 16 and the sealant layer 17 are bonded to each other by an adhesive or the like. The laminated film 15 formed in this way has high strength, impact resistance, sealing properties, air resistance, and the like.

  A bag 12 as shown in FIG. 1 can be formed from a single laminated film 15. First, one laminated film 15 is rounded into a substantially cylindrical shape so that the sealant layer 17 is disposed inside. Next, the cylindrical laminate film 15 is formed by heating and bonding the sealant layers 17 at the end portions of the laminate film 15. After filling the filling material 14 from the opening of the cylindrical laminated film 15, an adhesive portion 18 is formed by heating and bonding the sealant layers 17 at the ends of the opening to form the filling material 14. A sealed bag 12 can be formed.

The opening groove 13 shown in FIG. 3 is formed by removing a part or all of the laminated film 15 in the thickness direction of the base material layer 16 on the outer surface A of the laminated film 15 forming the bag body 12. Has been. However, the opening groove 13 is formed so as not to reach the inside of the sealant layer 17.
By forming the opening groove 13 in this way, the strength of the portion having the opening groove 13 in the laminated film 15 has a predetermined value lower than the strength of the portion not having the opening groove 13. .
The opening groove 13 melts part or all of the base material layer 16 in the thickness direction by irradiating the outer surface A of the laminated film 15 with laser light before the bag body 12 is filled with the filling material 14. By doing so, it can be formed.

  As shown in FIG. 4, the bag body 12 formed of the laminated film 15 is filled with the filling material 14 and sealed, and then subjected to heat treatment, so that the bag body 12 contracts and is predetermined together with the filling material 14. The substantially cylindrical shape of is expressed.

When performing the heat treatment, the base material layer 16 of the laminated film 15 as shown in FIG. 3 contracts. In order to prevent the strength of the bonded portion between the already bonded sealant layers 17 from being damaged under the influence of this heat treatment, the sealant layer 17 is adhesive at a temperature higher than the heat shrink temperature of the base material layer 16. It is desirable to use materials that will have
For the base material layer 16, for example, heat-shrinkable nylon is used, and for the sealant layer 17, for example, linear low-density polyethylene or unstretched polypropylene is used. In this case, for example, polyethylene is used as the adhesive. Examples of the bonding method include an extrusion laminating method using polyethylene and a dry laminating method using an adhesive other than polyethylene. Alternatively, these can be laminated by fusing the base material layer 16 and the sealant layer 17 without using an adhesive.

  As shown in FIG. 5, the package 11 can be opened using a column 19 that is firmly installed on a floor or the like. First, the outer surface opposite to the opening groove 13 of the bag body 12 across the center axis C is in contact with the circumferential surface of the support column 19, and the direction of the center axis C of the bag body 12 and the extending direction of the support column 19 are mutually opposite. The bag body 12 is arrange | positioned so that it may orthogonally cross. Then, a predetermined external force is applied to the bag body 12 by applying a force F in a direction perpendicular to the central axis C to both ends of the bag body 12 in the direction of the central axis C with the support column 19 as a fulcrum.

  As described above, due to the presence of the opening groove 13 formed on the outer surface A of the bag body 12, the strength of the portion having the opening groove 13 of the bag body 12 is greater than the strength of the portion not having the opening groove 13. Also has a low value. For this reason, the bag body 12 receiving a predetermined external force is torn from the opening groove 13, and the package body 11 is opened as shown in FIG. In this manner, the filling material 14 filled and sealed in the bag body 12 can be taken out from the packaging body 11 without using a blade such as a knife.

  As described above, since the bag body 12 receives the internal pressure from the filler 14 due to the contraction and maintains a predetermined substantially cylindrical shape, the bag body 12 is gripped at both ends to perform an opening operation. It is possible. Further, since the length in the central axis C direction of the bag body 12 is longer than the length in the width direction orthogonal to the central axis C, it becomes easy to apply the force F in the opening operation, thereby applying a predetermined external force to the bag body 12. It becomes easy.

In addition, since no cutting tool is used, a piece of the laminated film 15 forming the bag body 12 is not generated by the opening operation, and the filling material 14 taken out at the manufacturing site such as a confectionery bread or a cooking bread is not filled with this. It is possible to prevent such pieces from being mixed.
Furthermore, since the package 11 can be opened only by hand without using a blade, the opening operation is simplified.

Embodiment 2
In the first embodiment, a heat-shrinkable film that shrinks by heating is used as the laminated film 15, and the bag body 12 is shrunk after the bag 14 formed by the laminated film 15 is filled with the filling material 14. However, it is not always necessary to shrink the bag. That is, a bag body can also be formed from a laminated film that does not heat shrink.
In the same manner as in the first embodiment, the package body can be formed by filling the inside of the bag body made of a laminated film that is not thermally contracted with the filling material 14 and sealing it. Also in this case, by forming the opening groove on the outer surface of the bag made of the laminated film, the filling material can be taken out from the package without using a knife such as a knife.
The laminated film can be formed from the same material as that described in Embodiment 1, but since it is not necessary to cause heat shrinkage, for example, the base film layer of the laminated film has heat shrinkability. Not nylon can be used.

Embodiment 3
FIG. 7 shows a package 21 according to the second embodiment. In the first embodiment, as shown in FIG. 1, the unsealing groove 13 is a single straight line, but it is not necessarily a single straight line. As shown in FIG. 7, the bag body An opening groove 23 in which a plurality of groove portions 23 </ b> A are linearly arranged over a predetermined length L can be disposed on the outer surface of 22. The bag body 22 is formed from the laminated film 15 similarly to the bag body 12 of the package body 11 according to the first embodiment.
Thus, even if the opening groove 23 including the plurality of groove portions 23 </ b> A is arranged on the outer surface of the bag body 22, the strength of the portion having the opening groove 23 in the bag body 22 does not have the opening groove 23. The strength of the portion is lower, and the packaging body 21 can be opened only by hand without using a blade as in the first embodiment.
It should be noted that the opening groove 23 made up of a plurality of groove portions 23A as shown in FIG. 7 can also be arranged on the package according to the second embodiment.

Embodiment 4
In Embodiments 1 to 3, the laminated film 15 has one base material layer 16 and a sealant layer 17 as shown in FIG. 3, but may have two or more base material layers. A laminated film 33 having a first base layer 31A, a second base layer 31B, and a sealant layer 32 as shown in FIG. 8 can also be used.

The opening groove 34 formed on the outer surface A of the laminated film 33 passes through the first base material layer 31A and reaches the second base material layer 31B, and the thickness of the second base material layer 31B. It is formed so that part or all of the direction is removed and does not reach the inside of the sealant layer 32.
Further, the opening groove 34 may be formed so as to remove part or all of the first base material layer 31A in the thickness direction and not reach the inside of the second base material layer 31B.

For example, heat-shrinkable polyethylene terephthalate is used for the first base material layer 31A constituting the laminated film 33, and heat-shrinkable nylon is used for the second base material layer 31B. For the sealant layer 32, for example, linear low density polyethylene or unstretched polypropylene is used. In order to bond these layers together, for example, an extrusion laminating method using polyethylene, a dry laminating method using an adhesive other than polyethylene, or fusion can be used.
In addition, when forming a bag body from the laminated film which does not heat-shrink like said Embodiment 2, as a forming material of the 1st base material layer 31A and the 2nd base material layer 31B, heat shrinkability A material having no can be used.

  Thus, even if it fills with the to-be-filled object in the bag body using the laminated | multilayer film 33 which has a base material layer of two layers, and comprises a package body, by forming the groove | channel 34 for opening, Embodiment 1 Similarly to 3, the package can be opened only by hand without using a blade.

The opening grooves 13, 23 and 34 in the first to fourth embodiments are means other than irradiating the outer surface A of the laminated film 15 or 33 forming the bag body 12 or 22 with laser light, for example, chemicals or It can also be formed using a jig. Further, the opening groove 13 is not formed on the outer surface A of the laminated film 15 or 33 after the bag body 12 or 22 is filled with the filling object 14 but before the bag body 12 or 22 is filled with the filling object 14. 23 or 34 can also be formed. Similarly, the opening groove 13, 23, or 34 can be formed on the outer surface A of the laminated film 15 or 33 before the bag bodies 12 and 22 are formed.
Further, the substantially cylindrical shape of the bag body 12 or 22 has a length of 1.5 to 5 times the length in the central axis C direction with respect to the length in the width direction orthogonal to the central axis C direction. In the opening method shown in FIG. 5, it is preferable because the force F can be easily applied and the packaging bodies 11 and 21 can be easily opened.
In addition, in said Embodiment 1-4, it replaces with the paste-like to-be-filled material 14, Various filling materials which have fluidity | liquidity, such as powdery materials, such as wheat flour, liquid materials, such as syrup, or a mucilage Things can also be used.

Example 1
A tensile test based on JIS K 7127 was performed on the laminated film 15 in the first embodiment. This tensile test is performed by pulling the ends of the test piece in the length direction so as to be separated from each other in the length direction in an environment of an ambient temperature of 23 ° C. and a relative humidity of 50%. Is to measure.
FIG. 9 is a plan view showing a test piece 41 for a tensile test. The test piece 41 is formed of a rectangular laminated film having a length of 150 mm, a width of 15 mm, and a thickness of 0.075 mm. The test piece 41 extends in the width direction near the center of the length direction of the test piece 41 and reaches both ends in the width direction. An opening groove 42 is arranged. As shown in FIG. 10A, as the opening groove 42, one linear groove that crosses the test piece 41 in the width direction was used. That is, the opening groove 42 has a length of 15 mm, which is equal to the width of the test piece 41. In addition, in order to implement a test on the conditions close | similar to Embodiment 1 and Embodiment 3, the test piece 41 was formed with the laminated film previously heat-shrinked by heat processing.

Example 2
As the opening groove 42, as shown in FIG. 10B, a groove having a total length of 14 mm by dividing into two groove parts along the width direction of the test piece 41 is used. Otherwise, the tensile test was performed in the same manner as in Example 1.
Example 3
As the opening groove 42, as shown in FIG. 10C, a groove having a total length of 13 mm by dividing into three groove parts along the width direction of the test piece 41 is used. Otherwise, the tensile test was performed in the same manner as in Example 1.
Example 4
As the opening groove 42, as shown in FIG. 10D, a groove having a total length of 12 mm by dividing into four groove parts along the width direction of the test piece 41 is used. Otherwise, the tensile test was performed in the same manner as in Example 1.
Example 5
As the opening groove 42, as shown in FIG. 10E, a groove having a total length of 10 mm by dividing into six groove parts along the width direction of the test piece 41 is used. Otherwise, the tensile test was performed in the same manner as in Example 1.
Example 6
As the opening groove 42, as shown in FIG. 10 (F), a groove having a total length of 7.5 mm by dividing into eight groove portions along the width direction of the test piece 41 is formed. A tensile test was conducted in the same manner as in Example 1 except for using.
Comparative Example 1
A tensile test was performed in the same manner as in Example 1 except that the test piece 41 having no opening groove was used.

  FIG. 11 is a graph showing test results of tensile tests in Examples 1 to 6 and Comparative Example 1. The vertical axis represents the tensile strength of the test piece 41. The value of the tensile strength of the test piece 41 increases as it goes to the right of the graph of FIG. 11 from Example 1 to Comparative Example 1, that is, as the total length of the groove portions constituting the opening groove 42 decreases. The test result was obtained. In particular, the value of the tensile strength of the test piece 41 having no opening groove of Comparative Example 1 is conspicuous with respect to the value of the tensile strength of the test piece 41 having the opening groove 42 of Examples 1 to 6. The result was very high.

Furthermore, the embodiment of the opening groove of the test piece 41 in Examples 1 to 6 and Comparative Example 1 is applied to the package 11 of the first embodiment shown in FIG. 1 or the package 21 of the second embodiment shown in FIG. The transportation test according to JIS Z 0200 was applied. Each package has a substantially cylindrical shape, the length in the length direction is 500 mm, and the length in the width direction orthogonal to the length direction is 160 mm. On the outer surface of the bag body to which the opening groove in Examples 1 to 6 is applied, an opening groove disposition portion is set from the vicinity of the center in the central axis direction of the bag body to 110 mm in the circumferential direction of the substantially cylindrical shape. .
As a result of the transportation test, it was found that the bag body to which the embodiment of the opening groove of the test piece 41 in Examples 3 to 6 and Comparative Example 1 was applied has sufficient strength for transportation. On the other hand, the bag body to which the embodiment of the opening groove of the test piece 41 in Example 1 and Example 2 is applied is not sufficiently strong for long-distance transportation as compared with Examples 3-6. However, it is preferable to use it in an application where strength is not so necessary, such as transportation within the same factory, since it can be opened with a small force.

Moreover, when an opening experiment was performed on these packages using the support 19 as shown in FIG. 5, the package applied with the mode of the groove for opening the test piece 41 in Examples 1 to 5 was applied. As a result, it was easily opened. Moreover, it turned out that the package which applied the aspect of the groove | channel for opening of the test piece 41 in Example 6 requires big force in order to open.
On the other hand, the packaging body corresponding to Comparative Example 1 that does not have any opening groove was difficult to open by hand only even when the support 19 was used.

That is, from the graph of FIG. 11, when the laminated film 15 in the portion where the opening groove is arranged has a tensile strength of 20 to 30 N / 15 mm, it has a sufficient strength particularly for transportation. However, it was confirmed that it was possible to form a package that was easy to open by hand without using a knife.
Even in the case of forming a bag body from a laminated film that does not thermally shrink as in the second embodiment, if the tensile strength of the laminated film in the portion where the opening groove is arranged is 20 to 30 N / 15 mm, it is transported. On the other hand, it is possible to form a package that has sufficient strength but can be easily opened only by hand without using a blade.

11, 21 Packaging, 12, 22 Bag, 13, 23, 34, 42 Opening groove, 14 Filled material, 15, 33 Laminated film, 16 Base material layer, 17, 32 Sealant layer, 18 Adhesive part, 19 Strut, 23A groove portion, 31A first substrate layer, 31B second substrate layer, 41 test piece, A outer surface, B inner surface, C center axis, L predetermined length, F force.

Claims (9)

A bag formed by a laminated film having at least a base material layer and a sealant layer and disposed so that the sealant layer is exposed to the inside;
A to-be-filled material having fluidity filled and sealed in the bag body;
A groove for opening formed on the outer surface of the bag body without reaching the inside of the sealant layer,
The bag body has a substantially cylindrical shape extending in the axial direction,
The to-be-filled material is a heavy object that cannot hold the shape,
The opening groove, as opposite ends across the opening groove than of the bag in the circumferential direction of the bag is located inside, only the axial direction from near the center of a predetermined in the circumferential direction length Elongate,
In the laminated film, the portion having the opening groove has a tensile strength of 20 to 30 N / 15 mm,
The package body, wherein the filling material is taken out by tearing the bag body from the opening groove by applying a certain external force to the bag body. A bag formed by a laminated film having at least a base material layer and a sealant layer and disposed so that the sealant layer is exposed to the inside;
A to-be-filled material having fluidity filled and sealed in the bag body;
A groove for opening formed on the outer surface of the bag body without reaching the inside of the sealant layer,
The laminated film is a heat shrinkable film that shrinks by heating,
The to-be-filled material is a heavy object that cannot hold the shape,
The bag body expresses a predetermined substantially cylindrical shape together with the filling material by shrinking the laminated film by heat treatment after sealing the filling material,
The opening groove, in the circumferential direction of the bag as both ends of the opening groove than at both ends of the bag is located inside a predetermined in the circumferential direction from near the center of the axial direction of the substantially cylindrical For the length of
The laminated film has a tensile strength of 20 to 30 N / 15 mm at the portion having the opening groove after shrinkage,
The package body, wherein the filling material is taken out by tearing the bag body from the opening groove by applying a certain external force to the bag body.   The package according to claim 1 or 2, wherein the filling material is a heavy product up to 20 kg.   The said substantially cylindrical shape has a value of 1.5 to 5 times the length of the axial direction with respect to the length of the width direction orthogonal to an axial direction. The package described.   The said bag body is torn from the said groove | channel for opening by the said external force being added so that the both ends of the axial direction of the said substantially cylindrical shape may be displaced relatively with respect to a center part. The package described in 1.   The said opening groove | channel is formed from the one continuous groove part over the said predetermined length, or is formed from the several groove part arrange | positioned in the range of the said predetermined length. The package according to any one of the above.   The package according to any one of claims 1 to 6, wherein the opening groove is formed by irradiating the surface of the laminated film with laser light.   The package according to any one of claims 1 to 7, wherein the opening groove is formed before the bag is filled with the filling material.   The package according to any one of claims 1 to 8, wherein the filling material is a viscous material, a liquid material, or a powdery material.

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