JP2000177755A - Container having spout part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an inner side of a spout from being heat-welded in heat- welding a wall surface of a body part with the spout, etc., at a stroke by forming the spout by laminating resin films different in melting point, and forming an inner film of a film of low melting point. SOLUTION: Two side end parts 2 of a body part wall surface 1 are heat- welded 2a, 2b, and a bottom wall surface 3 is heat-welded 3a to one end part orthogonal thereto. An opening part is arranged on an end part orthogonal to two side end parts 2 and opposite to the bottom part, and a spout 5 is heat welded 5a to a notched corner part. The spout 5 is formed of a laminated resin film comprising a resin film of high melting point as an inner layer and a resin film of low melting point as an outer layer. The differential temperature at each melting point in both resin films is set to be at least 30 deg.C. A sealant layer of the laminated resin film to form the body part is simultaneously heat welded to an outer layer of low melting point in which the spout is formed in one operation with other heat welded part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a container with a spout. More specifically, it is composed of a laminated resin film and has fluidity such as liquid cosmetics such as shampoo and rinse, bathtub detergent, dishwashing detergent, laundry soap, milk, powdered milk, kinako, sugar, and powdered fertilizer for horticulture. The present invention relates to a tubular container with a spout or a bag-like container (standing pouch type) suitable for storing an article having the following.

[0002]

2. Description of the Related Art Conventionally, a bag-like container with a spout is self-supporting and has the characteristics of a three-dimensional container despite being formed of a soft packaging material such as a resin film. It is widely used as a container for storing articles having fluidity such as liquid articles and powdery articles. However, regarding the opening, (1) a method in which the entire upper part is cut out and opened using a notch provided in the upper part of the container with a spout (see, for example, JP-A-9-24956);
(2) Cut off the corner of the upper part of the bag-like container with scissors and open it, and use it as a spout. (3) Insert the spout with a cap prepared separately with a resin molded product etc. into the upper part of the container. A method of attaching to the opening in advance by a thermal bonding method or the like, and opening the cap by removing the cap,
And so on.

[0003] However, the method (1) has a problem that the container with the spout is soft and therefore easily overflows from above when held by hand, especially when the contents are liquid. In addition, the method of the above (2) can reduce the risk of accidentally overflowing the contents because the opening can be narrowed as compared with the method of the above (1), but it requires scissors when opening. When the opening is narrowed, the inner surfaces of the film on both sides of the opening are easily adhered to each other, so that it is difficult to continuously pour the stored articles to the end with a stable flow. In particular, when the remaining amount is low, it is necessary to press the bag-shaped container by hand and forcibly push it out. When transferred to a container, there is a drawback that articles are easily spilled.

Further, in the above method (3), the size of the opening and the like can be set in a stable shape suitable for the properties of the articles stored in advance and the pouring conditions. Compared with the method (2), the safety and stability of the pouring operation are superior. However, when attaching a spout made of such a resin molded product to a container, not only does the manufacturing process become complicated, but the container is bulky, and it is necessary to fill the article from a normally small spout. A special filling device is required, and the cost of separately manufacturing a resin spout is also extra. Therefore, there is a drawback that the cost for packaging is significantly increased.

[0005] As a bag-like container with a pouring opening (standing pouch type) which has solved the above-mentioned disadvantages, Japanese Patent Laid-Open No.
Japanese Patent Publication No. 218204 proposes the one described,
Since the pouring port extends outward from the body part whose plane shape is almost quadrilateral, a considerable percentage of non-reusable parts that occur when punching from the wide raw material film when manufacturing this bag-like container are considerable. Disadvantage. In addition, there is a disadvantage that the volume increases when storing and transporting the bag-shaped container of the product, resulting in an increase in cost.

[0006]

SUMMARY OF THE INVENTION In such a situation, the present inventors have provided a container which can solve the above-mentioned drawbacks which existed in a cylindrical or bag-shaped container with a spout at once. As a result of intensive studies, the present invention has been completed.
The objects of the present invention are as follows. 1. To provide a container with a spout that can be manufactured in a simple process. 2. To provide a container with a spout that is not bulky and does not increase in volume during storage and transportation. 3. To provide a container with a spout that does not require scissors when opened. 4. Provided is a container with a spout capable of safely and easily transferring the stored articles when transferring the articles stored in the container to another container such as a bottle.

[0007]

In order to achieve the above object, according to the present invention, a container is formed by laminating two linear resin films each having one side and heat-welding a side portion connected to the one side. And a container with a pouring outlet formed with an opening and a tubular pouring outlet on one side or on the other side or side away from the one side, wherein the tubular pouring port is made of a resin having a high melting point. It is composed of a laminated resin film with a film as the inner layer and a resin film with a low melting point as the outer layer, and a resin film layer with a low melting point that forms the outer layer, and a resin film shell that forms the body wall surface of the container. Provided is a container with a spout, characterized in that the inside of the wall is heat-sealed.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
In the container with a spout according to the present invention, the body wall surface is formed of two resin films. This bag-shaped container with a spout is formed by laminating two resin films each having a straight side, and heat-welding a side portion connected to one side of the straight line to form a body wall surface of the container, An opening and a tubular spout are formed on one side or on the other side or side away from the one side. The container with a spout according to the present invention includes a bag-shaped container (standing pouch) having a gusset structure in which one side is a bottom wall surface, in addition to an envelope-shaped cylindrical container having a square planar shape. By adopting a gusset structure on the bottom wall surface, when articles are stored in the storage section of the bag-like container, it is expanded to form a three-dimensional container,
The bag-shaped container can be made independent and can be set up on a horizontal portion regardless of whether or not articles are stored.

[0009] The shape of the upper side of the straight side of the container having one side straight is not particularly limited, and may be a polygon such as a triangle, a quadrangle, or a pentagon. These polygons do not need to be strict polygons, and can be deformed by providing notches or the like. Further, in addition to geometric shapes such as a kamaboko type and a good arc type, shapes having animal motifs such as bears and lions and vegetable types such as peppers, tomatoes, and pumpkins may be used.

[0010] The resin film forming the cylindrical or bag-shaped container with a spout is not particularly limited, and may be a single-layer or laminated resin film which has been conventionally used for producing such a container. , Excellent mechanical strength,
A heat-weldable resin film can be used. Among them, a laminated resin film obtained by combining a film having excellent gas barrier properties can be used. The type of the resin film, the number of layers, the order of the laminated film, etc., constituting the laminated resin film are determined by the size of the container, the usage form, and the container (filled)
It can be appropriately selected according to the type of article to be performed, the presence or absence of a heat treatment after filling, and the like.

The single-layer resin film used for manufacturing the container with a spout according to the present invention includes a polypropylene (PP) film and a high-density polyethylene (HDPE).
Film, low density polyethylene (LDPE) film,
Linear low-density polyethylene (L-LDPE) film,
An ethylene / vinyl alcohol copolymer (EVOH) film may be used.

The laminated resin film exhibits excellent properties such as gas barrier properties and strength as compared with a single-layer film. As a resin film for imparting strength to the laminated resin film, a biaxially oriented polyamide (ON) film, a biaxially oriented polyethylene terephthalate (PET) film, a biaxially oriented HDPE film,
What is necessary is just to add a biaxially stretched PP film. Examples of the film that imparts gas barrier properties to the laminated resin film include a vinylidene chloride film, an EVOH film, and the like.
ON film, PET film, HDPE film, P
A resin film in which aluminum, silicon oxide, or the like is vapor-deposited on one side of a P film, an aluminum foil, and the like can be given.

The laminated resin film can be produced by (1) a co-extrusion method or (2) a dry lamination method with an adhesive interposed therebetween. When the latter adhesive is interposed, a method of applying an anchor coat agent to the base film in advance may be employed in order to improve the adhesive strength. The adhesive that can be interposed is not particularly limited as long as it can be used for bonding a resin film. For example, ethylene / α-olefin copolymer, graft-modified ethylene / α-olefin copolymer, ethylene / vinyl acetate Olefin-based adhesives such as copolymers and chlorinated polypropylene; acrylic-based adhesives such as ethylene-acrylic acid copolymers and acrylic acid-vinyl acetate copolymers; polyvinyl acetate-based adhesives; styrene / butylene / styrene blocks (SBS) copolymer, styrene / ethylene / butylene / styrene block (SEBS) copolymer, rubber-based adhesive such as nitrile rubber, isocyanate-based adhesive, and the like. Examples of the anchor coating agent include isocyanate, organic titanate, and organic silicate.

[0014] A sealant layer made of a resin having a low melting point is formed on the surface of the laminated resin film on the film for imparting heat welding property to the laminated resin film. Sealant layer (S
Suitable for forming the layer) are L-LDPE
Film, unstretched PP (CPP) film, ethylene
α-olefin copolymer, ethylene / vinyl acetate copolymer film, ethylene / acrylic acid copolymer film,
Examples include ionomers and polyester resins.
Among these, the L-LDPE film is excellent in stability of heat welding and deterioration due to stored articles, for example, stress cracking resistance to a surfactant, and the CPP film is excellent in heat resistance and low odor. It is suitable for storing articles that require these performances. In addition, the ethylene / α-olefin copolymer produced using a metallocene catalyst has a narrow molecular weight distribution and a stable copolymerization ratio, so it has excellent low-temperature heat-weldability and hot-weldability. And stable thermal welding is achieved.

As specific examples of the laminated resin film, (1)
ON film / adhesive / L / LDPE film (S
Layer), (2) ON film / adhesive / uniaxially stretched HDPE film (S layer), (3) ON film / adhesive / uniaxially stretched PP film, (4) ON film / adhesive / uniaxially stretched P
P film / adhesive / aluminum foil / adhesive / LL
DPE film (S layer), (5) ON film (silicon oxide vapor deposition) / adhesive / uniaxially stretched HDPE film / adhesive / L / LDPE film (S layer), (6) ON film /
Anchor coat layer / Co-extrusion coat (HDPE layer / L ・
LDPE layer), (7) ON film / anchor coat layer /
Co-extrusion coat (HDPE layer / L / LDPE layer) / adhesive / L / LDPE layer (S layer), (8) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / L / LDPE layer (S layer), (9) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive /
CPP film (S layer), (10) PET film / adhesive / EVOH film / adhesive / ON film / adhesive /
CPP film (S layer), (11) PP film (silicon oxide vapor deposition) / adhesive / CPP film (S layer), (12) PE
T film (silicon oxide vapor deposition) / adhesive / ON film / adhesive / L·LDPE layer (S layer). The laminated resin film is not limited to those exemplified above.

In the bag-like container with a spout (standing pouch) according to the present invention, the body wall surface and the bottom wall surface are formed of the same resin film as the above resin film. Here, the same type means a resin film obtained by combining a film having excellent mechanical strength and the like.
Even when the resin film is a laminated resin film, it means that it is a laminated resin film combining a heat-sealable film, a film with excellent gas barrier properties, etc. It is not necessary that the laminated resin films have the same configuration.

The cylindrical container or bag-like container (standing pouch) with a spout according to the present invention has an opening and a tubular spout. The opening and the tubular spout are preferably provided on the upper side, but it is also possible to provide the opening on the bottom side of the container and the tubular spout on the upper side. For example, if the planar shape of the container is cylindrical, it is preferable to provide the opening and the tube-shaped spout separately on one side on the upper side, but the opening is provided on the bottom side, and the tube-shaped spout is placed on the upper side. Can also be provided. In the case of a standing pouch, it is preferable that an opening is formed in a side portion including a position that becomes the highest when the pouch is self-standing, and a pouring opening is separately provided near the opening. The opening functions as a storage port when storing articles in the container,
After storing the articles, they are heat-sealed and sealed. The tubular spout formed together with the opening functions as a spout when taking out an article stored in the container or transferring the article to another container.

The tube-shaped pouring spout is heat-welded at a predetermined position in a state where it is crushed into a flat plate shape, and can be deformed into a tube having a circular cross section at the time of use. The length of the tubular pouring spout, the width in a crushed state, and the like can be appropriately selected depending on the size of the container, the type of articles stored in the container, the diameter of another container to be transferred from the container, and the like. The shape of the container is approximately quadrilateral, one upper corner is cut out, and a tubular spout is heat-welded to this cutout, and then the spout that protrudes outward from the body wall surface. However, it is preferable that the size and the length are heat-welded so as to fit within the outline of the body wall surface having a substantially quadrilateral shape, because the volume does not increase during storage and transportation.

The tube-shaped spout is provided on the upper side of the container so that it does not leak after the article is stored in the container, and functions as a spout when transferring the article. The pouring port is formed of a resin film having a high melting point as an inner layer (hereinafter, sometimes referred to as "I layer") and a resin film having a low melting point as an outer layer (hereinafter, sometimes referred to as "O layer"). It is composed of a laminated resin film. By using such a combination of the tubular spout, when the container with the spout is manufactured by the heat welding method, the tubular spout can be thermally bonded to the container at the same time as the other heat-welded portions. It is preferable. That is, the sealant layer of the laminated resin film forming the body (hereinafter, referred to as
The “S layer” is sometimes referred to as the “S layer”) and the O layer having a low melting point that forms the tubular spout can be heat-welded together with the other heat-welded portions in one operation. At the time of such heat welding, the I layer composed of a resin film having a high melting point does not mutually heat weld under the temperature and pressure conditions under which the S layer and the O layer are heat welded. Can be a spout.

According to an experiment conducted by the present inventor, the temperature difference between the melting point of the resin film having a high melting point forming the I layer and the melting point of the resin film having a low melting point forming the O layer is 30 ° C.
It was found that it was necessary to combine the above resin films. When the temperature difference between the melting points of the resins constituting the I layer and the O layer is less than 30 ° C., when the S layer and the O layer are thermally welded, the I layer is also welded at the same time, thus fulfilling the function of a tubular spout. Will be gone. The resin constituting the I layer and the O layer is selected from resins having a high melting point of 160 ° C. or higher for forming the I layer, and a resin film having a low melting point for forming the O layer is preferably selected from the resins having a melting point of 160 ° C. or higher. Is better to be selected from resins having a temperature of 130 ° C. or lower. Furthermore, it has been found that it is preferable to combine resins having the same or as small a temperature difference as possible, for example, within ± 3 ° C., in the melting points of the resins constituting the S layer and the O layer. When the melting points of the resins constituting the S layer and the O layer are selected from those having the same or a similar temperature difference with a small temperature difference, the I layer can be reliably thermally welded between the S layer and the O layer without being thermally welded. .

The tubular spout composed of a laminated film having an I layer and an O layer is preferably manufactured at once by a co-extrusion method because it is efficient and preferable. And may be post-processed into a tube shape. As the resin having a high melting point for forming the I layer, polycarbonate, PET,
Examples of the resin having a low melting point for forming the O layer include the same resins as those for forming the sealant layer on the body wall surface.

The tubular spout is as described above.
It is thermally welded between the S layer of the laminated resin film which is planarized and forms the two body wall surfaces and the O layer which forms the tubular spout, but is not thermally welded to the body wall surface. Leaving the front end outside the body wall, leaving one end of the sealing resin film on the front and back from the front end side protruding to the non-heat-welded front end to the body wall, heat-sealing or It is preferable to seal and seal with an adhesive such as a heat-sensitive adhesive. At this time, the resin film for sealing the opening is formed by heat-welding to the tip of the tubular pouring port by physically modifying the adhesive surface by corona discharge treatment or forming an oxide film. Adjustment of strength becomes easy. It is preferable that both ends on the body wall surface side are left as free ends without being heat-welded because the free ends can be used as knobs when the resin film for sealing the opening is peeled off.

The following is an example of a procedure for producing a standing pouch type container from a laminated resin film, which is a container with a spout according to the present invention.
First, (1) a laminated resin film forming a body wall surface is cut from a long and wide laminated resin film so that, for example, a plane shape thereof is substantially quadrilateral. (2) One laminated resin film forming the cut body wall surface is arranged at a predetermined position with the S layer facing upward. (3) On one end perpendicular to the two side ends of the laminated resin film, a laminated resin film of the same type as the laminated resin film constituting the body wall surface for forming the bottom wall surface is folded inside. After heat welding, they are arranged so as to form a gusset structure. At the same time, (4) a tube-shaped spout prepared in advance is arranged at a position where the spout at the other end orthogonal to the two side ends of the bag-like container is to be attached. (5) Another one of the laminated resin films forming the body wall surface is placed on these at a predetermined position with the S layer facing downward.

Finally, (6) (a) the two end portions facing each other are thermally welded to form a body wall surface, and (b) a laminated resin film constituting the body wall surface and a laminated resin film constituting the bottom wall surface (C) heat-welding the laminated resin film constituting the body wall surface and the O-layer of the tubular spout to form the body wall surface and the bottom wall surface; And the tubular spout. In the operation of (a), the heat welding of the body wall is made parallel to each other, in the operation of (b), the heat welding of the bottom wall is arranged so that the bottom wall has a gusset structure, and the operation of (c) In such a case, it is necessary to take care that the heat welding does not seal the tubular outlet and does not excessively protrude from the tubular outlet toward the article storage section. Although each of the operations (a) to (c) can be performed in the order of (a), (b), and (c), it is preferable that the operations be performed at once in one step.

Through the above-mentioned steps (1) to (6), the two side ends of the body wall are heat-welded, and the bottom wall is integrally heat-sealed at one end perpendicular to the two side ends. There is obtained a standing pouch-type container with a spout that is welded and heat-welded with a tubular spout on the side opposite the bottom. When the container is cylindrical, the container can be manufactured in the same procedure as above except that the step (3) and the step (b) of the above (6) become unnecessary.

In order to fill the container with a spout according to the present invention with an article, the opening side of the container is turned upward, the container is inflated to open the opening, and the container is filled with the article through the opening. After a certain amount of filling, the opening may be sealed by heat welding. Operations such as inflation of the container storage section, opening of the opening, filling of articles, and heat welding of the filled opening can be automatically and continuously performed in an in-line process.

The capacity of the container with a spout according to the present invention can be selected in the range of 200 ml to 20 liters depending on the type of articles to be stored. Articles stored in containers include liquid cosmetics such as shampoos and rinses, liquid or powdery bathtub detergents, liquid or powdery bath salts, liquid or powdery toilet detergents, and liquid or powdery tableware Examples include liquid detergents, liquid or powdered laundry soaps, liquid or powdered health foods, milk, powdered milk, kinako, flour, sesame, sugar, and granular fertilizers for horticulture. The articles to be stored are not limited to those illustrated.

When using an article stored in a container or transferring it to another container, the resin film for sealing the opening of the pouring opening is peeled off and opened, and a tube-shaped pouring crushed in a flat shape is performed. Press both sides of the plane of the outlet with your fingers to form a tube with a circular cross section, and project the part that protrudes outside without being welded to the body wall surface of this tube to the opening of another container for transferring goods. By inserting, the stored articles can be safely and easily transferred to the end. If the empty capacity of the other container for transferring the goods is smaller than the capacity of the container, the goods will remain in the container, but the resin film for closing the opening is poured and one surface of the outer end of the opening is discharged. Can be folded to the other side, sandwiched by clips and sealed and stored.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following description unless it exceeds the gist.

FIG. 1 is a plan view of an example of a container with a spout (standing pouch type) according to the present invention, FIG. 2 is a partially enlarged plan view of an example of a spout, and FIG. It is a sectional enlarged view in the -A part.

In FIG. 1, two side ends 2 of the body wall surface 1 are heat-welded, and a bottom wall surface 3 is integrally heat-welded to one end orthogonal to the two side ends. An opening 4 is provided at the end perpendicular to the two side ends of the body wall and opposite to the bottom.
Are provided in the cut-out corners, and the spouts 5 and 15 are provided.
Are heat welded. 2a, 2b, 3a, and 5a are all heat-welded portions. FIG. 1 shows an example in which the tip of the spout 5 does not fit within the outline of the body wall surface 1 having a substantially quadrangular shape. However, it is preferable that the tip of the spout 5 fit within the outline. As you did. FIG. 1 illustrates a container having a substantially quadrangular planar shape, but is not limited thereto, as described above.

FIG. 2 shows a state in which a pouring opening 15 is heat-welded to one slightly cut corner of the body wall surface 11. The body wall surface 11 and the pouring opening 15 are not thermally welded over the entire surface, and a part 15b that is not thermally welded partially remains. One end of the pouring opening 15 protrudes toward the article storage side, and the other end protrudes outward without being thermally welded to the body wall surface. In the example shown in FIG. 2, about half of the entire length of the spout 15 is heat-welded to the body wall surface, and about half protrudes outward without being heat-welded to the body wall surface. The portion protruding outward has an opening sealing resin film 16.
Are bonded to each other, and the tip of the resin film 16 for sealing the opening is formed as a free end 17 so that the resin film 16 can be picked up with a finger to start peeling.

FIG. 3 is an enlarged cross-sectional view showing the film structure of the spout in detail, wherein 21 is a resin film having a high melting point, 22 is an adhesive, 23 is a resin film having a low melting point, 24 Is an adhesive portion, and the outer end of the pouring opening is sealed by heat welding an opening sealing resin film 16 from the front end to the front and back, and the free end 17 is not bonded and is free from the free end. You can see that it is done.

[0034]

The present invention has the following particularly advantageous effects, and its industrial value is extremely large. 1. The container with a spout according to the present invention is configured such that the spout is formed by laminating resin films having a melting point difference of 30 ° C. or more, the inner film having a high melting point, and the outer film having a low melting point. Because it is a film, it is manufactured without heat welding the inside of the spout when the two side edges of the body wall, the body wall and the bottom wall, and the body wall and the spout are heat-sealed at once. Can be
The manufacturing process can be simplified. 2. The spout with the spout according to the present invention, the spout is provided in the corner of a plane having a substantially quadrangular shape, and is flat in a state in which no articles are stored, and the plane is substantially a quadrilateral body wall. Since it can be prevented from protruding from the outer line, it is very advantageous because the volume does not increase during storage and transportation. 3. The container with a spout according to the present invention is opened when the outer end of the flat tube-shaped spout is folded and heat-sealed by sealing one opening-sealing resin film to the front and back. When doing this, tools such as scissors are unnecessary and convenient. 4. The container with a spout according to the present invention is used when storing and sealingly packaging an article having fluidity such as a liquid,
When an article stored in a container is transferred to another container such as a bottle, the stored article can be safely and easily transferred to the end via a pouring opening.

[Brief description of the drawings]

FIG. 1 is a plan view of an example of a bag-like container with a spout according to the present invention.

FIG. 2 is a partially enlarged plan view of an example of a spout portion.

FIG. 3 is an enlarged cross-sectional view taken along a line AA in FIG. 2;

[Explanation of symbols]

 1, 11: torso wall surface 2: two side ends of torso wall surface 2a, 2b, 12a: two side ends of torso wall surface 3: bottom wall surface 4, 14: opening 5, 15: pouring port 16: Opening sealing resin film 17: Free end 22: Adhesive 23: Low melting point resin film 24: Adhesive part

Claims (5)

[Claims] 1. A resin film having one side formed in a straight line is superposed on two sides, and a side portion connected to the one side is heat-welded to form a wall surface of a body portion of the container, and the one side or the other side separated from the one side Alternatively, in a container with a spout having an opening and a tubular spout formed on the side, the tubular spout is a laminate in which a resin film having a high melting point is used as an inner layer and a resin film having a low melting point is used as an outer layer. Pouring characterized by being made of a resin film and being heat-welded to the inside of the body wall surface of the resin film forming the outer wall of the resin film layer forming the outer layer and the body film wall surface of the container. Container with outlet. 2. The pouring according to claim 1, wherein one side formed in a straight line is folded back with the same kind of resin film as the resin film constituting the wall of the body part inside, and heat-welded to form a gusset structure. Container with outlet. 3. The laminated resin film constituting the tubular spout is a combination of two or more resin films in which the melting point of the resin having a high melting point of the inner layer is higher than the melting point of the resin having a low melting point of the outer layer by 30 ° C. or more. The container with a spout according to any one of claims 1 and 2. 4. The tubular pouring spout is crushed in a plane, and one resin film for sealing an opening is bent and bonded to the front and back from the distal end side of the tubular pouring spout. Item 4. The container with a spout according to any one of Item 3. 5. The resin film for sealing an opening has free ends that are not bonded at both ends.
4. A container with a spout according to 4.