JP3124658B2 - Connected body of bag for milk bag-in-box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a bag-in-box (Bag-in-box).
in Box) related to the connection of bags for the transport of liquids classified as "milk" in the ordinance of the Ministry of Milk, especially raw milk, milk, processed milk, etc.
The present invention relates to a connected body of a bag for a milk bag-in-box, in which a plurality of bags for a milk bag-in-box suitably used for storage are connected so as to be individually separable.

[0002]

2. Description of the Related Art Bag-in-boxes, which are disposable so-called one-way containers, have been widely used for transporting and storing various liquids such as beverages such as mineral water and industrial chemicals.

[0003] This bag-in-box uses a foldable bag or container made of plastic for the interior and a corrugated cardboard box on the interior, and is provided with water resistance, chemical resistance, gas barrier property and the like to the liquid content. The structure is such that the rigidity required for transportation and storage is provided to the exterior while the plastic is provided. Compared to conventional glass bottles, tin cans, etc., the bag-in-box constructed in this way does not require collection, which contributes to labor saving and cost saving, and is easy to transport and store empty containers because it can be folded. This has the advantage that the distribution cost can be reduced.

On the other hand, as containers for liquids classified as "milk" in the ordinance of the Ministry of Milk, such as raw milk, milk, and processed milk, containers made of polyethylene-processed paper called so-called milk cartons have been widely used.

[0005]

However, the above-mentioned milk carton has excellent properties mainly as a small container for home use, but it is not suitable for use in business or transportation between factories, for example. There is a disadvantage that it is not always appropriate in terms of capacity, strength, and the like.

For this reason, it is conceivable to use a bag-in-box as a large-sized container suitable for business use or transportation between factories, for example. A conventional bag-in-box is required for containers such as raw milk and milk. Those that sufficiently satisfy various properties such as safety and strength have not yet been developed. For this reason, the present applicant has developed a milk bag-in-box bag body which sufficiently satisfies various characteristics such as safety and strength required for containers of raw milk, milk and the like, and has proposed this earlier. Since this is a single body, it is not always convenient, for example, when only bags are transported in large quantities.

The present invention has been made in view of the above circumstances, and an object of the present invention is to sufficiently satisfy various properties such as safety and strength required for containers for raw milk, milk, and the like.
In accordance with the Ministerial Ordinance for Milk, etc., a milk bag-in-box bag body having an advantage that it can be suitably used for transportation and storage of those classified as `` milk '' is a plurality of bags connected individually and separably, and An object of the present invention is to provide a dairy bag-in-box connected body suitable for mass transportation and storage.

[0008]

According to the present invention, there is provided a bag-in-box having a bag body made of a polyethylene (PE) film, and an injection spout attached to the bag body. A bag-in-box bag body in which a plurality of bag bodies are connected so as to be individually separable, wherein the bag body comprises at least one co-extruded film of high-density polyethylene (HDPE) and low-density polyethylene (LDPE). Two or more polyethylene (PE) films, including a four-sided seal, are superimposed on each other, the outermost layer is formed by a high-density polyethylene (HDPE) layer of the co-extruded film, and the injection port is formed by the bag body. Spout made of low-density polyethylene (LDPE) that is heat-sealed to the inner surface of the spout and high-density polyethylene spout attached to the spout A dairy bag-in-box bag comprising a cap made of ren (HDPE), wherein a plurality of said dairy bag-in-box bags are individually separated from each other by thermal fusion of connecting pieces made of polyethylene (PE) tape. A dairy bag-in-box bag connection, characterized in that the connection is possible and in the lateral direction.

[0009]

According to the present invention, a plurality of dairy bag-in-box bags are connected to each other in such a manner that a plurality of dairy bag-in-box bags can be individually separated by heat-sealing a connection piece made of polyethylene (PE) tape. It was done. The bag for a milk bag-in-box, which constitutes this connection body, includes a bag body made of a polyethylene (PE) film, and an injection spout attached to the bag body. Here, the bag body is made of at least one coextruded film of high-density polyethylene (HDPE) and low-density polyethylene (LDPE).
And two or more polyethylene (PE) films, each of which is laminated by a four-sided seal, and the outermost layer is a high-density polyethylene (HD) of the co-extruded film.
(PE) layer. The injection spout is made of low-density polyethylene (LDP) which is thermally fused to the inner surface of the bag body.
E) and a cap made of high-density polyethylene (HDPE) attached to the spout. In other words, both the bag body and the injection spout directly contacting the contents “milk” are made of polyethylene (P
Since it is formed according to E), sufficient safety and strength satisfying the standards of the Ministry of Milk and the like are ensured and recycling is easy. Further, the bag body is formed by laminating at least two polyethylene (PE) films by a four-sided seal, and the polyethylene (PE) film forming at least the outermost layer of the bag body is made of high-density polyethylene (HDPE) and low-density polyethylene. It is formed by a high-density polyethylene (HDPE) layer constituting a co-extruded film with high-density polyethylene (LDPE). Therefore, the outermost layer of the bag body is excellent in heat resistance and strength, and is not easily stretched.
DPE) layer, and the inner layer is made of a low-density polyethylene (LDPE) layer that is easily stretched, so that the slip between two or more polyethylene (PE) constituting the bag body is good and the cushioning property is excellent. Moreover, it has a favorable property in distribution that a hole is not easily opened in the bag body. Moreover, among the caps and the spouts constituting the injection spout, the spouts that are thermally fused to the inner surface of the bag body are formed of low-density polyethylene (LDPE), so that the heat sealability is good. A plurality of dairy bag-in-box bags having such advantages are connected to each other by heat fusion of connecting pieces made of polyethylene (PE) tape so as to be individually separable. Therefore, it is suitable for mass transport of bags, and since the connecting piece is formed of a polyethylene (PE) film, even after each bag is individually separated, it is sufficient to satisfy the standards of the Ministerial Regulations such as Milk. Safety and strength are maintained. Further, if the connection piece has a perforation, the connection pieces are separated along the perforation, so that the individual bags can be easily separated.

[0010]

EXAMPLES Next, examples of the present invention will be shown, and the present invention will be described more specifically. FIG. 1 is an explanatory view showing an example of a connected body of a bag for a milk bag-in-box of the present invention,
FIG. 2 is an explanatory view showing a bag for a milk bag-in-box constituting the connected body. FIG. 3 is an explanatory view showing the configuration of the bag body of the bag for a milk bag-in-box.

As shown in FIG. 1, the connected body of the bag for a milk bag-in-box is a polyethylene film (P
A plurality of bags 1 for dairy bags in box comprising E)
Are connected so as to be individually separable by connecting pieces 2 made of polyethylene (PE) tape.

As shown in FIG. 2, a milk bag-in-box bag 1 according to this embodiment is made of polyethylene (P).
E) a bag body 3 made of a film and an injection pouring port 4 attached to the bag body 3;
As shown in FIG. 3, three co-extruded films 11, 12, and 13 formed by co-extrusion of high-density polyethylene (HDPE) and low-density polyethylene (LDPE) are co-extruded films 11 / The extruded film 12 / the co-extruded film 13 are formed in such a manner that they are superposed in order in a four-way seal.

In the present invention, high-density polyethylene (HDPE) refers to polyethylene having a density of 0.94 or more, and low-density polyethylene (LDPE) refers to polyethylene having a density of less than 0.94. In addition, these high-density polyethylene (HDPE) and low-density polyethylene (LDPE) both satisfy the following criteria for the dissolution test for heavy metal, evaporation residue and potassium permanganate consumption, burst strength and pinhole. It is necessary.

Namely, dissolution test (60 ° C., 30 minutes)
Medium, 1 ppm or less for heavy metals (4% acetic acid in leaching solution), 15 p for evaporation residue (4% acetic acid in leaching solution)
pm or less, potassium permanganate consumption (leaching solution water)
Is 5 ppm. The bursting strength is 5 kgf / kg when “milk”, which is the content of the bag body 1 formed using these polyethylenes, is a low-temperature distribution product.
cm ² or more, 8 kgf / cm if the product is distributed at room temperature
² or more. Further, it is required that there is no pinhole.

The coextruded film 11 constituting the outermost layer has a two-layer structure of a high-density polyethylene (HDPE) layer 11a and a low-density polyethylene (LDPE) layer 11b. The thickness of the high-density polyethylene (HDPE) layer 11a is , Usually 30 μm to 50 μm. The thickness of the low density polyethylene (LDPE) layer 11b is usually 100 μm.
１２０120 μm. In this embodiment, the thickness of the high-density polyethylene (HDPE) layer 11a is 30 μm, and the thickness of the low-density polyethylene layer 11b is 100 μm.

The coextruded film 11 constituting the outermost layer
, A co-extruded film 12 is superimposed adjacent thereto. The co-extruded film 12 constituting the middle layer includes a low density polyethylene (LDPE) layer 12a, a high density polyethylene (HDPE) layer 12b, and a low density polyethylene (LD
(PE) layer 12c.

Here, low density polyethylene (LDPE)
Layers 12a and 12c and a high density polyethylene layer (HDP
E) The thickness of the layer 12b is usually 20 to 40 μm.
m. In this embodiment, each layer has a thickness of 20 μm.
m.

The coextruded film 13 constituting the middle layer is overlaid with the coextruded film 13 adjacent thereto. The layer configuration of the coextruded film 13 constituting the innermost layer and the thickness of each layer are the same as those of the coextruded film 12.

As described above, the layer configuration of the bag body 3 is such that [the high-density polyethylene (HDPE) layer 11a / the low-density polyethylene (LDPE) layer 11b] /
[Low density polyethylene (LDPE) layer 12a / High density polyethylene (HDPE) layer 12b / Low density polyethylene (LDPE) layer 12c] / [Low density polyethylene (LD
PE) layer 13a / high-density polyethylene (HDPE) layer 1
3b / low density polyethylene (LDPE) layer 13c], the outermost layer is formed of high density polyethylene (HDPE), and the innermost layer is formed of low density polyethylene (LDPE).

The outermost layer is made of high density polyethylene (H
DPE) is made of high-density polyethylene (H
DPE) is superior in heat resistance and mechanical strength to low density polyethylene (LDPE), is not affected by heat during heat sealing, is hard to expand, and is difficult to open holes. The reason why (LDPE) is used is to secure the heat sealing property.

Each of the coextruded films 11, 12, 13
Are co-extruded films sealed on all sides and are not laminated on the whole surface of each co-extruded film. In FIGS. 1, 2 and 4, reference numeral 5 denotes a four-sided seal portion. However, the four-sided seal portion 5 may be provided in a double manner, for example, as an inner four-sided seal portion and an outer four-sided seal portion. For example, when two or more four-sided seal portions are provided, the buffer effect is further improved.

When the coextruded films are superposed as described above, slippage occurs between the opposing layers (facing layers) between the coextruded films. Are low-density polyethylene (L
Since the layer is a (DPE) layer, the layer has good slippage and a favorable buffering effect in distribution.

As shown in FIG. 2, the bag body 3 having such a structure has an injection spout 4 formed of a spout 41 made of low density polyethylene (LDPE) and a cap 42 made of high density polyethylene (HDPE). It is attached.

More specifically, a low-density polyethylene (LDPE) layer 13c constituting the innermost layer of the bag body 3 and a spout 21 made of low-density polyethylene (LDPE) are heat-sealed, and a screw cap 42 is attached to the spout 41. Is attached. The spout 41 is attached to a spout hole (not shown) provided in the bag body 3.

The sealing strength of the bag thus formed must be free of breakage and air leakage. The configuration of the bag body 3 is not limited to the illustrated one. For example, [the high-density polyethylene (HDPE) layer (thickness: 30 to 50 μm) / the low-density polyethylene (LDPE) layer (thickness) 100-120μ
m)] + Low density polyethylene (LDPE) film (40-80 μm thickness) + Low density polyethylene (LDPE)
A triple bag made of a film (thickness of 40 to 80 μm), [High-density polyethylene (HDPE) layer (thickness of 30 to 50 μm)
m) / Low density polyethylene (LDPE) layer (thickness 100
+120 μm)] + [Low density polyethylene (LDPE)
Layer (thickness 20-40 μm) / High density polyethylene (HD
PE) layer (thickness 20 to 40 μm) / low-density polyethylene (LDPE) layer (thickness 20 to 40 μm)] or [high-density polyethylene (HDPE) layer (thickness 30 to 50 μm) / low] High density polyethylene (LDPE)
Layer (thickness: 100 to 120 μm)] + [low density polyethylene (LDPE) layer (thickness: 20 to 40 μm) / high density polyethylene (HDPE) layer (thickness: 20 to 40 μm) / low density polyethylene (LDPE) layer (thickness) 20-40μ
m)] + [Low density polyethylene (LDPE) layer (thickness 2
0-40 μm) / high density polyethylene (HDPE) layer (thickness 20-40 μm) / low density polyethylene (LDP
E) layer (20 to 40 μm in thickness) + [low density polyethylene (LDPE) layer (20 to 40 μm in thickness) / high density polyethylene (HDPE) layer (20 to 40 μm in thickness) / low density polyethylene (LDPE) layer (Thickness 20-40μ)
m)].

The dairy bag-in-box bag 1 constructed as described above is connected to a plurality of pieces so as to be individually separable to form a linked body. Specifically, a connection piece 2 made of a polyethylene (PE) tape is heat-sealed to a high-density polyethylene (HDPE) constituting the outermost layer of an adjacent dairy bag-in-box bag body 1 and heat-fused into each dairy bag. The invoc bags 1 are connected so as to be individually separable.

Here, the thickness of the polyethylene (PE) tape forming the connection piece 2 is usually 80 μm to 150 μm.
As a material for forming the bag, a material having the same characteristics as the material for forming the outermost layer of the bag body 2 among various polyethylenes (PE), that is, high-density polyethylene (H
DPE) is preferably used. If the forming material of the connecting piece 2 is the same high-density polyethylene (HDPE) as the forming material of the outermost layer of the bag body 3, the intended bag 1 for each milk bag-in-box separately separated from the connected body. Characteristics are connection piece 2
Is maintained as it is in the remaining portion.

In order to separate each bag 1 for dairy bag-in-box from the connected body, each bag 1 for dairy bag-in-box may be cut off at the connection piece 2. Here, as shown in FIG. 4, if perforations 20 are formed in each connection piece 2, separation of each milk bag-in-box bag 1 is further facilitated.

The connected body of the bag for a milk bag-in-box constructed as described above is wound, for example, in a roll shape and transported to a milk factory or the like, and is individually separated from raw milk, milk, and processed milk. It can be suitably used as a container for products classified as "milk" in the ordinance of the Ministry of Milk and the like. Each bag for a milk bag-in-box filled with milk or the like is used in a state of being stored in an outer cardboard box.

[0030]

According to the present invention, milk having sufficient safety and strength as a container for raw milk, cow's milk, processed milk, etc., and having favorable properties in distribution such as a buffering effect, etc. A dairy bag-in-box bag is provided which is connected to a plurality of bag-in-box bags for individual separation and is suitable for mass transportation and storage.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a connected body of a bag for a milk bag-in-box according to the present invention.

FIG. 2 is an explanatory view showing an example of a bag for a milk bag-in-box according to the present invention.

FIG. 3 is an explanatory view showing a layer structure of a bag body constituting a bag for a milk bag-in-box according to the present invention.

FIG. 4 is an explanatory view showing another example of the connected body of the bag for a milk bag-in-box of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bag for milk bag-in-box 2 ... Connection piece 3 ... Bag body 4 ... Injection pouring tool 5 ... Four-side seal part 11 ... Co-extruded film 11a ... High density polyethylene (HDPE) layer 11b ... Low density polyethylene (LDPE) Layer 12: Co-extruded film 13: Co-extruded film 41: Spout 42: Cap

Claims (4)

(57) [Claims] 1. A bag-in-box bag having a bag-in-box bag having a bag body made of a polyethylene (PE) film and an injection spout attached to the bag body, the bag-in-box bags being individually separated from each other. A concatenation of
The bag body is formed by laminating two or more polyethylene (PE) films including at least one co-extruded film of high-density polyethylene (HDPE) and low-density polyethylene (LDPE) with a four-sided seal and forming an outermost layer. Is formed by a high-density polyethylene (HDPE) layer of the co-extruded film, and the pouring spout is heat-sealed to the inner surface of the bag body, and a spout made of low-density polyethylene (LDPE) and a high spout attached to the spout. A dairy bag-in-box bag comprising a high density polyethylene (HDPE) cap, wherein a plurality of said dairy bag-in-box bags are polyethylene (P)
E) A connected body of a bag for a dairy bag-in-box, which is connected in a transverse direction so as to be individually separable by heat fusion of connecting pieces made of tape. 2. A bag-in-box bag in which a plurality of bag-in-box bags each having a bag main body made of a polyethylene (PE) film and an injection spout attached to the bag main body are connected so as to be individually separable. Wherein the bag body comprises three coextruded films of high density polyethylene (HDPE) and low density polyethylene (LDPE) ;
The coextruded film on the outside is formed from the outside to the inside while the
Outer high density polyethylene (HDPE) layer and low density poly
It consists of a two-layer structure with an ethylene (LDPE) layer,
The coextruded film is a low density poly
Tylene (LDPE) layer and high density polyethylene (HDP)
E) Layer and low density polyethylene (LDPE) layer of three layers
The inner co-extruded film is oriented from outside to inside.
Once low density polyethylene (LDPE) layer and high density poly
Ethylene (HDPE) layer and innermost low density polyethylene
(LDPE) layer and a spout made of low-density polyethylene (LDPE) in which the injection port is heat-sealed to the inner surface of the bag body, and a high-density polyethylene (HDPE) attached to the spout. And a plurality of dairy bag-in-box bags, each of which is individually separable by heat-sealing a connection piece made of polyethylene (PE) tape. A linked body of a bag for a milk bag-in-box, characterized in that: 3. The connecting piece has a height of 80 to 150 μm.
3. A high density polyethylene (HDPE) tape.
4. The connected body of the bag for a dairy bag-in-box according to 4. 4. The connected body of a bag for a milk bag-in-box according to claim 1, wherein a perforation is formed in the connection piece.