WO1995023746A1

WO1995023746A1 - Package for rod type bodies

Info

Publication number: WO1995023746A1
Application number: PCT/JP1995/000237
Authority: WO
Inventors: Thomas Stridsberg; Masashi Watanabe; Norio Kobayashi
Original assignee: Tetra Laval Holdings & Finance S.A.
Priority date: 1994-03-04
Filing date: 1995-02-20
Publication date: 1995-09-08

Abstract

This invention has a first film provided with a flat portion (14b), and a bulging portion (14a) for holding a rod type body; and a second film heat sealed on the first film. It further has bonded portions (33, 34) at the parts thereof which are in the vicinity of the both ends thereof. The portion of a package for a rod type body which is other than the portions thereof which are in the vicinity of both ends of the same is separated from a packaging container (11). Consequently, it becomes easy to insert the fingers between the package for a rod type body and the packaging container (11) and peel off the package from the packaging container (11) accordingly. Since the width of a flat portion (14b) on a side edge part can be reduced, the width of the package for a rod type body also decreases, and the quantity of films used for the first and second films becomes smaller. When perforations (36, 37) are provided in the portions of the package which are spaced from the bonded portions (33, 34) toward an intermediate portion of the package, they serve as breaking lines, so that the package for a rod type body can be peeled off easily from the packaging container (11).

Description

Description Rods Package Technical field

The present invention relates to a bar-shaped package. Background art

2. Description of the Related Art Conventionally, liquid foods such as milk and soft drinks are generally sold in a packaging container made of a packaging material formed by coating the outer and inner surfaces of a paper base with a polyethylene resin or the like.

Examples of the packaging container include a gable-top packaging container having an inclined top portion and a flat-type packaging container having a flat top portion. Of these, small-capacity packaging containers that the purchaser can drink at one time are generally sold at stores, vending machines, etc., and are often consumed on the spot. Therefore, usually, a straw package formed by accommodating the straw opening in the film is attached to the packaging container and sold.

Also, in packaging containers for liquid foods such as yogurt and frozen desserts, a spoon package formed by accommodating a resin spoon in a film is usually attached to the packaging container for sale. I have.

FIG. 1 is a perspective view of a conventional packaging container, and FIG. 2 is a perspective view of a conventional straw pan cage.

As shown in the figure, a stick-shaped package, for example, a package 55, is attached to the side surface of the packaging container # 1. Then, the purchaser of the packaging container 11 pulls out the straw package 55 from the packaging container 11 so that the straw 56 can be taken out from the straw package 55. I have. In this case, the straw package 55 includes the first film 14 and the second film 13 whose peripheral edges are heat-sealed. The first film 14 has a bulging portion 14 a and a flat portion 14 b, and the second film 13 is a first film. By heat-sealing the straw 14, the straw 56 can be hermetically sealed in the bulging portion 14a.

A plurality of straw baskets 55 are collectively manufactured as a stroller (not shown), cut into 1 'pieces, pressed into the packaging container 11, and adhered to the packaging container 11 by heating and melting. . Numeral 57 denotes a joint for attaching the single-storage package 55 to the packaging container 11.

Next, a conventional straw applicator will be described.

FIG. 3 is an enlarged view of a heat welding part in a conventional straw applicator device. In the drawing, reference numeral 55 denotes a straw package after being forced by a stroller (not shown), and 56 denotes a straw housed in the straw package 55. Reference numeral 61 denotes a heating portion, and 62 a denotes a concave portion formed in front of the center of the heating portion 61 (to the left in the figure) to accommodate the bulging portion 14 a.

The heating section 61 holds the straw package 55 with the bulging section 14a housed in the concave section 62a, and affixes the straw package 55 to the packaging container 11 (FIG. 1). Wear it. Therefore, two pairs of heaters 63 are provided at portions corresponding to the flat portions 14b (one pair is shown in FIG. 3).

However, in the conventional rod-shaped package, the flat portion 14b is pressed against the packaging container 11 by the two pairs of heaters 63, and the straw package 55 is attached to the packaging container 11. Therefore, it becomes difficult to insert a finger between the straw package 55 and the packaging container 11, and it becomes more difficult to peel off the straw package 55 from the packaging container 11.

Further, when the straw-in-a-package 55 is attached to the packaging container 11, when the heat of the heater 63 is transmitted to the straw 56, the straw 56 is deformed or deteriorated. The width of the flat portion 14b must be sufficiently ensured. Accordingly, the width of the straw package 55 is increased, and the amount of the first film 14 and the second film 13 used is increased, so that the cost is increased.

Similarly, when attaching a spoon package (not shown) to the packaging container 11, it becomes difficult to pull the spoon package from the packaging container 11, and the width of the spoon package becomes wider, High cost due to increased film usage It will get worse.

The present invention solves the above-mentioned problems of the conventional rod-shaped package, and the rod-shaped package can be easily peeled off from the packaging container, and furthermore, the amount of film used is small and the cost can be reduced. The purpose is to provide. Disclosure of the invention

Therefore, in the rod-shaped package of the present invention, a first film in which a flat portion and a bulging portion for accommodating the rod-shaped body are formed, and a second film which is heat-sealed with the first film. And a film.

Then, joints are formed near both ends.

In this case, the first and second films and the packaging container are not joined at portions other than the joining portion. Therefore, since the portion other than the vicinity of both ends of the rod-shaped package is separated from the packaging container, it becomes easy to insert a finger between the rod-shaped package and the packaging container, and the rod-shaped package is pulled out of the packaging container. It is easier to remove.

Further, since the joints are formed near both ends of the rod-shaped package, the width of the flat portion on the side of the rod-shaped package can be reduced. Therefore, the width of the rod-shaped package is reduced, and the amount of the first and second films used is reduced, so that the cost can be reduced.

In another rod-shaped body package according to the present invention, a perforation is formed at a center side of the joining portion and slightly at an end portion side of a boundary portion between the bulging portion and the flat portion. It is a breaking line when peeling the rod-shaped package from the packaging container. Therefore, the rod-shaped package can be easily peeled off from the packaging container.

In still another rod-shaped package according to the present invention, the second film is attached to the packaging container at the joint portion by heating and melting. In this case, the heater is pressed against the joint.

In still another rod-shaped package according to the present invention, the second film is provided with the contact At the joint, it is stuck to the packaging container with an adhesive material. In this case, for example, a hot melt is injected into the packaging container, and the rod-shaped package is pressed against the packaging container via the hot melt.

In still another rod-shaped body package according to the present invention, a first film in which a flat portion and a bulging portion for accommodating the rod-shaped body are formed, and a second film which is heat-sealed with the first film. And a film.

Then, as the base resin, an ethylene vinyl acetate copolymer having characteristics of a region having a melting point and a vicat softening point higher than those of the hot melt is used as the base resin.

Therefore, even if the surface of the packaging container and the first film are formed of a resin having a different melting point from each other, when the heater is pressed against the joining portion, the resin on the surface of the packaging container forming the joining portion and the second resin are pressed. Is fused with the resin of the film. As a result, the storage package can be securely attached to the packaging container.

Further, the second film does not stick when touched at room temperature. Furthermore, even if a ladder composed of a plurality of rod-shaped packages is rolled in a staple shape, the ladders do not adhere to each other.

And since the ethylene vinyl acetate copolymer is only used as the second film, the consumption of the ethylene vinyl acetate copolymer can be reduced. Therefore, costs can be reduced.

Furthermore, when packaging containers are stored in a vending machine, for example, the bar-shaped package may be peeled off from the packaging containers even at a high temperature of 50 [te] or more and at a low temperature of 10 [te] or less. There is no.

In still another rod-shaped body package according to the present invention, a first film in which a flat portion and a bulging portion for accommodating the rod-shaped body are formed, and a second film which is heat-sealed with the first film. A film, and an adhesive film that covers the surface of the second film to form a joint.

In this case, the rod-shaped package is attached to the packaging container by heating and melting at the joints at both ends. The second film and the packaging container are not heated and melted in portions other than the joint. Therefore, near the both ends of the rod-shaped package Since the outer part is separated from the packaging container, it is easy to insert a finger between the rod-shaped package and the packaging container, and peeling the rod-shaped packaging from the packaging container is sufficient. It will be easier.

Then, an ethylene-vinyl acetate copolymer having properties in a region where both the melting point and the vicat softening point are higher than that of the hot melt is used as the base resin for the adhesive film.

Therefore, even if the surface of the packaging container and the second film are formed of resins having melting points different from each other, when the heater is pressed against the bonding portion, the resin and the resin on the surface of the packaging container forming the bonding portion have an adhesive property. The film and the power are 'fused'. As a result, the straw package can be securely attached to the packaging container.

Also, the adhesive film does not stick when touched at room temperature. Furthermore, even if a ladder made of a plurality of rod-shaped packages is wound into a roll, the ladders do not adhere to each other.

Since Echiren acetate Bulle copolymer will only be used as an adhesive film, thus _e can be reduced consumption of ethylene-vinyl acetate copolymer, it is possible to lower the cost.

Furthermore, when the packaging container is stored in the vending machine, for example, the rod-shaped package is detached from the packaging container even at a high temperature of 50 [] or at a low temperature of 10 [T] or less. Never. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a perspective view of a conventional packaging container, FIG. 2 is a perspective view of a conventional straw package, FIG. 3 is an enlarged view of a heat-welded portion in a conventional straw applicator, and FIG. FIG. 5 is an attached state diagram of the straw package according to the first embodiment, FIG. 5 is a longitudinal sectional view of the straw package according to the first embodiment of the present invention, and FIG. 6 is a straw diagram according to the first embodiment of the present invention. FIG. 7 is a cross-sectional view of the straw package according to the second embodiment of the present invention. FIG. 8 is a rear view of the single-storage package according to the third embodiment of the present invention. The figure is a rear view of the stroller 0 according to the third embodiment of the present invention, and FIG. 10 is an adhesive film according to the third embodiment of the present invention. FIG. 11 is a view showing a film coating apparatus, FIG. 11 is a characteristic diagram of an ethylene-butyl acetate copolymer according to a third embodiment of the present invention, and FIG. 12 is a perspective view of a straw package according to a fourth embodiment of the present invention. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In this case, a straw package will be described as the rod-shaped package, but the present invention can also be applied to a spoon package.

FIG. 4 is a diagram showing the state of attachment of the straw bunk cage according to the first embodiment of the present invention, FIG. 5 is a longitudinal sectional view of the straw package according to the first embodiment of the present invention, and FIG. FIG. 2 is a cross-sectional view of a strike α-package in the embodiment of FIG.

As shown in the figure, the opening 31 is attached to the side surface of the packaging container 11. In this case, the straw package 31 is positioned diagonally on the side surface of the packaging container 11 so that the straw package 31 as long as possible can be attached to a limited area.

The straw package 31 is composed of a first film 14 and a second film 13 whose peripheral edges are heat-sealed to each other. The first film 14 has a bulging portion 14 a and a flat portion. It has 1 4b. Then, the straw 56 can be sealed in the bulging portion 14a by heat sealing the first film 14 and the second film 13.

In this case, the first film 14 having a predetermined width is swollen at predetermined intervals to form a plurality of swollen portions 14a, and a strike σ-56 is formed in each of the swollen portions 14a. Then, the second film 13 is covered with the first film 14. Accordingly, a stroller (not shown) is formed by heat-sealing the first film 14 and the second film 13 in the flat portion 14b. Subsequently, each of the straw packages 31 of the straw ladder is cut one by one, pressed against the packaging container 11, and joined to the packaging container 11 by heating and melting. For this purpose, joints 33 and 34 are formed in the flat part 14 b near both ends of the straw package 31, and a heater (not shown) is pressed against the joints 33 and 34. Then, the resin forming the joints 33 and 34 is fused to the resin coated on the surface of the packaging container 11.

In this case, the second film 13 and the packaging container 11 are not joined to each other except for the joints 33 and 34. Therefore, as shown in FIG. 5, portions other than the vicinity of both ends of the straw package 31 are separated from the packaging container 11, and a finger is placed between the straw package 31 and the packaging container 11. Insertion becomes easy, and pulling out the straw package 31 from the packaging container 11 becomes easier accordingly.

Further, since the joints 33 and 34 are formed near both ends of the straw package 31, the width of the flat portion 1 b on the side of the straw package 31 can be reduced. Therefore, the width of the straw package 31 is also reduced, and the amount of the first film 14 and the second film 13 used is reduced, so that the cost can be reduced.

By the way, on the center side of the joints 33, 34 in the strike opening package 31 and on the edge side slightly from the boundary between the bulging portion 14a and the flat portion 14b. The perforations 36 and 37 are formed so as to cross the straw package 31. In this case, the perforations 36 and 37 are formed by using a needle-shaped heater (not shown) and heat-sealing the first film 14 and the second film 13 to each other at predetermined intervals. Is done. Further, the perforations 36 and 37 are formed in the flat portion 14 b where the first film 14 and the second film 13 are heat-sealed to each other, so that the perforations 36 and 37 are formed. The sealing performance of the straw package 31 does not decrease due to 37.

In the green area around each of the perforations 36 and 37, the resin forming the first film 14 and the second film 13 is fused to each other by receiving heat from the needle-shaped heater. I do. Therefore, even if perforations 36 and 37 are formed at the boundary between the bulging portion 14a and the flat portion 14b, it is possible to maintain the sealing property of the straw package 31.

As described above, since the perforations 36, 3 7 are formed at the center side from the joints 33, 34, the perforations 36, 37 are used to separate the straw package 31 from the packaging container 11. It becomes a breaking line when peeling. Therefore, strike one package 3 1 packaging container It can be easily peeled off from 1.

Further, since the perforations 36 and 37 are formed at the boundary between the bulging portion 14a and the flat portion 14b or slightly at the end side from the boundary, the straw package 3 1 After being pulled out from the packaging container 11, the perforations 36, 37 can be broken with a weak force, and the straw 56 can be easily taken out from the straw package 31. .

The first film 14 and the second film 13 are produced, for example, by an inflation method or the like, and are made of a polyolefin resin, for example, a polyethylene resin (PE), a high-density polyethylene resin (HDPE), or a low-density polyethylene resin. (LDPE), polypropylene resin (PP), stretched polypropylene resin (0 PP) and the like can be used. In this case, if the surface of the packaging container 11 is coated with the same type of resin or a highly compatible resin as the second film 13, the distance between the second film 13 and the packaging container 11 is reduced. The heat melting property is good. Accordingly, by pressing the heater against the joints 33 and 34 as described above, the polyolefin resin forming the joints 33 and 34 and the resin coated on the surface of the packaging container 11 are separated. The straw package 31 is fused and the straw package 31 can be attached to the packaging container 11. The stretched polypropylene resin is formed by extruding a polypropylene resin to form a film, and then stretching the film uniaxially or biaxially. In this case, the polypropylene resin becomes transparent because the crystallization proceeds by being formed into a film.

In addition, a non-olefin resin may be used as the first film 14 and the second film 13 instead of the polyolefin resin.

By the way, when a polypropylene resin or the like is used as the first film 14 and the second film 13, if the surface of the packaging container 11 is covered with a polyethylene resin or the like, the melting points of the two greatly differ. Since the compatibility is reduced, the heat melting property between the second film 13 and the packaging container 11 is reduced. In this case, even if the heater is pressed against the joints 33, 34 as described above, the polypropylene resin or the like forming the joints 33, 34 and the polyethylene coated on the surface of the packaging container 11 It is not fused with resin. Therefore, when a non-olefin-based resin, a polypropylene resin, or the like is used as the first film 14 and the second film 13, the second film 13 and the packaging container at the joints 33, 34 are used. Second and third embodiments in which an adhesive material is interposed between the polyethylene resin on the surface of 11 and the straw package 31 is adhered to the packaging container 11 with the adhesive material will be described.

FIG. 5 is a cross-sectional view of a straw package according to the second embodiment of the present invention. As shown in the figure, the straw package 31 is composed of a first film 14 and a second film 13. The straw 56 is accommodated in the bulging portion 14a. Then, an adhesive 61 as an adhesive material is applied between the second film 13 and the packaging container 11 or is injected by a hot melt gun (not shown).

As the adhesive 61, a hot melt based on ethylene-vinyl acetate copolymer (EVA) can be used. In this case, a hot melt is sprayed from a hot melt gun and sprayed on the side wall of the packaging container 11, and the straw package 31 is pressed onto the packaging container 11 via the hot melt and adhered.

By the way, if a hot melt is used as the adhesive 61, a heating device (not shown) for maintaining the hot melt in a molten state is required, and the size of the straw applicator device (not shown) is increased. And consumes a lot of energy. In addition, hot melts are constantly heated and therefore degrade, resulting in reduced adhesive strength and clogged hot melt gun nozzles.

Further, when the hot melt is sprayed from the hot melt gun, the hot melt is scattered, so that the consumption of the hot melt is increased, and the cost power is increased. And, since it cannot be applied uniformly on the surface of the packaging container 11, it may be peeled off from the storage container 11.

Furthermore, when the packaging container 11 is stored in a vending machine, for example, the hot melt melts at a high temperature of 50 [te] or more, and at a low temperature of 10 [te] or less. Since the hot menoleto solidifies, it may come off from the packaging container 1 1 with a strong opening.

Therefore, in place of the adhesive 61, both the vicat softening point and the melting point are hot. A third embodiment using an adhesive film higher than the melt as an adhesive material will be described.

FIG. 8 is a rear view of the straw package according to the third embodiment of the present invention, FIG. 9 is a rear view of the stroller according to the third embodiment of the present invention, and FIG. 10 is a third view of the third embodiment of the present invention. FIG. 11 is a view showing a device for coating an adhesive film in an example. FIG. 11 is a characteristic diagram of an ethylene-butyl acetate copolymer in a third example of the present invention. In FIG. 11, the horizontal axis represents the melting point, and the vertical axis represents the Vicat softening point.

As shown in the figure, the straw package 31 comprises a first film 14 and a second film 13 force, and accommodates a straw 56 in a bulge portion 14a (FIG. 4). . Then, an adhesive film 64 is previously coated on the second film 13 near both ends of the back surface of the straw package 31.

In fact, the straw package 31 having the above structure is formed as a straw mouth ladder 62 as shown in FIG. 9, and the adhesive film 64 covers both sides of the straw ladder 62. Is done. Then, each of the storage packages 31 of the storage ladder 16 is cut one by one, pressed against the packaging container 11, and adhered to the packaging container 11 by heating and melting.

To this end, the vicinity of both ends of the straw package 31 on the side of the first film 14 is formed as joints 33, 34 (FIG. 4), and a heater (not shown) is pressed against the joints 33, 34. Can be Therefore, the adhesive film 64 is melted by the heat of the heater and fused to the resin coated on the surface of the packaging container 11.

In this case, as the adhesive film 64, an ethylene vinyl acetate copolymer having properties in a range higher than that of the hot melt in both the vicat softening point and the melting point is used as the base resin. Therefore, even if the adhesive film 64 is coated on the second film 13, the adhesive film 64 is not sticky to touch at room temperature. Further, even if the stroller 162 is wound into a roll, the stroller 162 does not adhere to each other.

Since the ethylene-vinyl acetate copolymer is only used as the second film 13, the consumption of the ethylene-vinyl acetate copolymer can be reduced, and the cost is reduced. Also, make sure that the straw package 3 1 is Since the straw package 31 can be stuck to the packaging container 11, the straw package 31 can be prevented from coming off the packaging container 11.

Further, when the packaging container 11 is stored in a vending machine, for example, even at a high temperature of 50 [T] or more, or at a low temperature of 10 [] or less, the straw package 31 is placed in the packaging container. It does not come off from 1.

In this example, since the second film 13 and the packaging container 11 can be adhered to each other with the adhesive film 64, the first film 14 and the second film 13 are used. Either a polyolefin-based resin or a non-olefin-based resin can be used.

Further, the adhesive film 64 can be coated on the back surface of the stroller 62 after forming the stroller 62, but can also be pre-coated on the second film 13. . o

When the second film 13 is coated with the adhesive film 64 in advance, as shown in FIG. 10, the second film 13 and the adhesive film 64 are paired with a pair of rollers 6 7. The adhesive film 64 can be coated on the second film 13 by being sandwiched between the first film 13 and the second film 13 and heated by the rollers 67 and 68. The second film 13 is unwound from a film roll 70, and the adhesive film 64 is unwound from an adhesive film roll 69.

Next, the characteristics of the adhesive film 64 will be described.

In this example, an ethylene-butyl acetate copolymer was used as the adhesive resin 64 as a base resin, and the ethylene-vinyl acetate copolymer having the properties shown in Table 1 was used.

【table 1】

M F R

Density 0.92 to 0, 94 (g / cif)

Vinyl acetate content 110 (wt%)

Melting point 90-: L 0 5 [te]

Vicat softening point 70 to 85 (te) In the table, MFR indicates the extrusion rate according to JISK7210 “Method for testing the flow of thermoplastics”.

The adhesive film 64 having the characteristics shown in Table 2 was used.

[Table 2]

When the melting points and the vicat softening points of the various polyethylene acetate butyl copolymers are plotted, they are as shown in FIG. Here, the vicat softening point is an index of heat resistance.

When the above-mentioned ethylene-vinyl acetate copolymer is applied to a hot melt, one that falls within the region AR1 in the figure is usually used. That is, when the MFR is greater than 10 [dg / min], the butyl acetate content is 25 [wt%] or more, the melting point is 80 [X] or less, and the vicat softening point is 50 [te] or less. Certain ethylene vinyl acetate copolymers are used as hot melts.

On the other hand, when the ethylene-butyl acetate copolymer is applied to the adhesive film 64 shown in the present example, as described in Table 1, the force that can be used in the area AR 2 in the figure is the most powerful. preferable. That is, the MFR is 0.5 to 10 (dg / m in (= g / l 0 [min])]], the content of butyl acetate is less than 10 [wt%], the melting point is 90 to 105 [te], and the vicat softening point is A polyethylene butyl acetate copolymer of 70 to 85 is used as the adhesive film 64. Note that an adhesive film 64 that fits in the area AR 3 in the figure can also be used.

Further, in the present embodiment, a polyolefin-based resin or a polyolefin-based resin is used in place of the ethylene vinyl acetate copolymer in which the ethylene vinyl acetate copolymer is used as the base resin as the adhesive film 64. Copolymers can also be used as base resins.

Next, a fourth embodiment of the present invention will be described.

FIG. 12 is a cross-sectional view of a straw package according to a fourth embodiment of the present invention.

As shown in the figure, the straw package 31 is composed of a first film 14 and an adhesive film 71 as a second film, and a straw 56 is accommodated in the bulging portion 14a. . Then, the adhesive film 71 covers the entire back surface of the straw package 31.

A plurality of the straw packages 31 are manufactured in a lump as a stroller (not shown), cut one by one, pressed against the packaging container 11, and adhered to the packaging container 11 by heating and melting. .

For this purpose, joints 3 3 and 3 4 (FIG. 4) are formed in the flat portions 14 b near both ends of the straw package 31, and a heater (not shown) is pressed against the joints 3 3 and 3 4. The resin of the adhesive film 71 forming the joints 33 and 34 is fused to the resin coated on the surface of the packaging container 11.

It should be noted that the present invention is not limited to the above-described embodiments, but can be variously modified based on the gist of the present invention, and they are not excluded from the scope of the present invention. Industrial applicability

Straw package with straw contained in film, spoon with film It can be applied to a spoon package housed inside.

Claims

The scope of the claims

1. (a) a first film having a flat portion and a bulge portion for accommodating a rod-like body;

(b) A rod-shaped body package having the first film and a second film that is heat-sealed, and (c) having joints formed near both ends.

2. The rod-shaped body package according to claim 1, wherein a perforation is formed at a center side of the joint portion and at an end side slightly from a boundary portion between the bulging portion and the flat portion.

3. The rod-shaped package according to claim 1, wherein the second film is attached to the packaging container at the joint portion by heating and melting.

4. The rod-shaped package according to claim 1, wherein the second film is attached to a packaging container at the joint portion with an adhesive material.

5. (a) a first film having a flat portion and a bulging portion for accommodating a rod-like body;

(b) having the first film and a second film that is heat-sealed,

(c) A rod-shaped package, characterized in that an ethylene-vinyl acetate copolymer having characteristics of a region having a higher melting point and a higher vicat softening point than a hot melt is used as a base resin for the second film.

6. (a) a first film having a flat portion and a bulging portion for accommodating a rod-like body;

(b) a second film heat sealed with the first film;

(c) an adhesive film that covers the surface of the second film to form a joint,

(d) A rod-shaped package comprising, as the resin, an ethylene-vinyl acetate copolymer having characteristics of a region having a higher melting point and a higher Vicat softening point than that of hot melt.