JP2579724Y2 - Dairy bag in box - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-in-box used for conveying dairy products including raw milk and milk drinks.

[0002]

2. Description of the Related Art As the taste of tap water as drinking water deteriorates, the use of mineral water has been promoted. In bottles, the amount of mineral water packed is limited to one or two liters.

[0003] Therefore, a bag-in-box, which is lightweight and can store a large amount of products without being bulky, has been adopted in the industry as a container for transporting liquids such as mineral water and fruit juice. In the bag-in-box, the structure of the inner bag is a multiple bag including an oxygen-impermeable film, so that when the juice is filled in the inner bag, the juice is prevented from being deteriorated by oxygen.

[0004] On the other hand, the Food Sanitation Law classifies foods that come into direct contact with containers and packaging according to raw materials and manufacturing methods, and specifies containers and packaging that can be used in accordance with ministerial ordinances for milk and dairy products. ing. That is, in the Ministerial Ordinance for Milk, etc., raw milk, milk, processed milk and the like are collectively referred to as milk, cream, butter, lactic acid bacteria drinks, milk drinks and the like are referred to as dairy products,
It is specified that dairy containers are limited to glass bottles, polyethylene containers, and polyethylene-coated paper containers, and dairy containers are limited to glass bottles, polyethylene containers, polyethylene-coated paper containers, and polystyrene-coated paper containers.

[0005]

Although the bag-in-box is lightweight and bulky and can hold a large amount of product, it is desirable to use it to transport dairy products, including raw milk and milk drinks. Containers and packaging materials that can be used as containers for transporting dairy products including raw milk and milk drinks,
Since it is limited by ministerial regulations, the inner bag of the bag-in-box must be formed using a polyethylene film.

However, polyethylene which can be used in accordance with the Ministerial Ordinance of Milk and the like is a monopolymer of ethylene. As an additive, only up to 2.5 g of calcium stearate or 0.3 g of glycerin fatty acid ester per 1 kg of polyethylene is recognized. Absent. When forming the inner bag with a polyethylene film that satisfies the above rules, the heat sealing is performed by heat-sealing the polyethylene films with each other by ordinary heat sealing means. The polyethylene material leaks to the outside from the end face of the polyethylene film, making the appearance unsightly, reducing the film thickness of the heat-sealed part, making it difficult to perform appropriate heat-sealing processing, or reducing the sealing strength of the heat-sealed part. There is a problem. In addition, since there is a limitation on the plastic film that can be used, the film strength is not strong.

[0007] The present invention has been made in view of the above points, and an object of the present invention is to provide a dairy bag-in-box which facilitates heat sealing of an inner bag and can increase the sealing strength. And

[0008]

The dairy bag-in-box according to the present invention comprises an inner bag made of polyethylene film for enclosing the dairy product, and an inner bag made of a stretched high-density polyethylene tape yarn. A base sheet formed by laminating a nonwoven fabric and a polyethylene film is constituted by an outer bag formed with the polyethylene film inside, and the inner bag and the outer bag are joined to each other by heat-sealing means, and an opening is formed on one surface of the outer box. A mouth portion is provided in a part of the inner bag, and the mouth portion of the inner bag is projected outside through an opening provided in the outer case.

[0009]

The dairy bag-in-box of the present invention heat seals the polyethylene films when the inner bag is formed of the polyethylene film, but the polyethylene material melted in the heat seal portion is provided on the base sheet. It is held in the space of a woven or non-woven fabric made of stretched high-density polyethylene tape yarn, so that the molten polyethylene material does not leak outside, heat-sealing becomes easy, and the polyethylene film used for heat-sealing is Since the film thickness is secured, the sealing strength of the heat-sealed portion can be kept high. Moreover, when applied to a 20-liter container, a strong film strength can be obtained.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a bag-in-box according to the present invention. The bag-in-box 1 includes an outer box 2 assembled by a cardboard carton or cardboard, and a double structure accommodated in the outer box 2. It is composed of a bag 3.

The inner bag 3 has a thickness of 8 as shown in FIG.
It is composed of an inner bag formed of a 0-micron polyethylene film, an outer bag formed of a nonwoven fabric made of a stretched high-density polyethylene tape yarn, and a substrate laminated with a 100-micron-thick polyethylene film.

The inner bag 3 is formed by first forming inner bag forming pieces 4 and 4 obtained by cutting a polyethylene film having a thickness of 80 μm into a rectangular shape, and a nonwoven fabric 5 made of a drawn high-density polyethylene tape yarn. An outer bag forming piece 7 is prepared by cutting a base sheet formed by laminating a polyethylene film 6 having a thickness of 100 microns into a rectangular shape.
The inner bag forming pieces 5, 5 are superimposed on each other, and the outer bag forming pieces 7, 7 are superimposed on the superposed inner bag forming pieces 5, 5 with the polyethylene film 6 facing down. This is performed by heat-sealing the entire circumference by ordinary heat-sealing means. In the heat-sealing portion formed by the heat-sealing means, the polyethylene material melted in the heat-sealing portion is held in the space of a woven or non-woven fabric made of a stretched high-density polyethylene tape yarn provided on a base sheet, and melted. The polyethylene material does not leak to the outside, there is no problem with the heat sealing process, and since the molten polyethylene material does not leak to the outside or migrate inside, The thickness of the polyethylene film can be kept constant and the sealing strength of the heat-sealed portion can be kept high.

As shown in FIG. 3, the nonwoven fabric 5 is provided with fine cracks 9 at regular intervals in the width direction in stretched high-density polyethylene films 8, 8 of juxtaposed stretch high-density polyethylene film rolls. The split fibers 10 separated from each other are formed, the split fibers 10 are sent obliquely so as to intersect with each other, and the intersections of the split fibers 10 are heated and pressed by the heat roll 11 to fuse the intersections, thereby forming a plurality of split fibers. Is made by bonding the split fibers 10 to each other at the position. Nonwoven fabric 5 made in this way
Has a small thickness, light weight, and excellent formability.
The nonwoven fabric 5 forming the base sheet can be changed to a woven fabric. In this case, the split fibers 10 are woven using a loom. Plain weave is desirable as the woven fabric in consideration of strength and thickness. In the case of a woven cloth, the density can be adjusted as required by adjusting the number of shots.

In the above embodiment, the number of inner bags is one, and the inner bag has a double structure. However, it is needless to say that the inner bag may have a multi-layered structure with two or more inner bags. In addition, a bag-shaped gusset bag can be appropriately selected. In FIG. 1, reference numeral 12 denotes an outlet, and the outlet 12
Is projected to the outside through an opening (not shown) provided in the. If the outlet 12 is not provided, the outlet is cut by a cutting tool.

[0015]

As described above, according to the present invention, the inner bag is made of polyethylene film, and the inner bag is made of a stretched high-density polyethylene tape yarn. The sheet is composed of an outer bag formed with a polyethylene film inside, the inner bag and the outer bag are joined to each other by heat sealing means at their peripheral portions, an opening is provided on one surface of the outer box, and a portion of the inner bag is opened. Part, and the mouth of the inner bag is made to protrude outside through the opening provided in the outer box, so that the polyethylene material melted in the heat-sealed portion is made of a stretched high-density polyethylene tape yarn provided in the base sheet. It is held in the space of woven or non-woven fabric, and the molten polyethylene material does not leak outside, making the heat-sealing process easier. Since the film thickness of the polyethylene film when heat-sealing process is ensured, it is possible to maintain high sealing strength of the heat sealed portion, moreover, it is possible to make a dairy container was tough film strength.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a dairy bag-in-box according to the present invention.

FIG. 2 is a partial cross-sectional view of the inner bag of the dairy bag-in-box according to the present invention.

FIG. 3 is a view showing a manufacturing process of a nonwoven fabric using a drawn high-density polyethylene tape yarn as a raw material.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag-in-box 2 Outer box 3 Inner bag 4 Inner bag forming piece 5 Nonwoven fabric 6 Polyethylene film 7 Outer bag forming piece

Claims (2)

(57) [Scope of request for utility model registration] 1. A bag-in-box in which an inner bag enclosing a dairy product is accommodated in an outer box, wherein the inner bag is made of a polyethylene film, and an inner bag made of a stretched high-density polyethylene tape yarn. Alternatively, a base sheet formed by laminating a nonwoven fabric and a polyethylene film is constituted by an outer bag formed with the polyethylene film inside, and the inner bag and the outer bag are joined to each other by heat-sealing means at the periphery thereof, and are opened on one surface of the outer box. Wherein a mouth portion is provided in a part of the inner bag, and the mouth portion of the inner bag protrudes outside through an opening provided in the outer case. 2. The dairy bag-in-box according to claim 1, wherein there are two or more inner bags.