JP2000281089A - Packaging bags - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve adaptability to easy opening, shape-keeping and safety for a packaging bag by a method wherein a spout for pouring out contents is provided at the upper part of the packaging bag and while a severable easy unsealing means is provided, traversing the spout, completely-sealed finger seats are provided at both sides of a housing part under a line prepared for opening. SOLUTION: For a packaging bag 1, a housing part 9 is formed by applying heat sealing to heat sealing parts 3 of films for a front and rear faces. Then, diagonal sealing parts 6 are formed, running diagonally from the upper part of the heat sealing part 3 to the center. On pouring out contents from the packaging bag 1, the packaging bag 1 is opened along an opening induction line 4, starting from a notch 5 with a spout 2 placed facing upward. Then, pressing is made with fingers applied to finger seats RF and LF on both sides and thereby the spout 2 is opened. Thereby, the front and rear face films are expanded toward the outside and the packaging bag 1 is expanded into an upside-down funnel shape such as a conical shape. Therefore, the spout 2 is opened under a satisfactory state of shape keeping, allowing pouring-out to be started, and transfer or the like of contents can be made stably.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is a compact container having a shape and characteristics close to that of a three-dimensional container for its capacity, and has a pouring portion with an excellent opening at an upper portion. Foods such as curry represented by various retort foods, Oyakodon-no-moto, Gyudon-no-moto, which can be cooked and cooked over rice, or seasonings that are not heated before opening (Chinese food such as hemp tofu) Packaging bag (= pouch) that can be suitably used as a container filled with viscous contents, such as nonomoto, kamamei, mixed rice, pasta sauce, sushi, etc. ).

[0002]

2. Description of the Related Art Conventionally, foods such as curry represented by various retort foods, oyakodon soup, and gyudon soup, which can be cooked and cooked on rice, and seasonings not heated before opening. Viscous contents such as Chinese ingredients such as hemp tofu, mixed rice ingredients such as pot rice, pasta sauce, sushi ingredients, etc.
As a container filled with solid contents, it is mainly filled in a four-side sealed pouch, which is easier to distribute and costs less than a bottle. This was generally put in an outer box and distributed, taken out of the box at the time of use, and opened in a notch provided at the upper end of the four-sided seal bag to open the bag and squeeze out the contents. .

[0003] Also, since retort curry and the like cannot be placed in a microwave oven as a bag, put it in a separate container and heat it with a wrap film, or put it in hot water and heat it before opening it and putting it on rice. Or

[0004] In the former case, extra dishes are used, and the work of washing the dishes is troublesome. In the latter case, the user had to have a pouch that was heated when opened, and there was a risk of burns.

[0005] Further, even if the contents are not heated before opening, the contents tend to remain in the inside, and it is necessary to handle the bag.

[0006] Bags used in such fields can be processed into various forms, for example, pouches such as a three-sided seal type and a four-sided seal type which are excellent in bag-making properties, and a film having a large film area. Standing pouches with a relatively large filling capacity and a self-supporting ability at the bottom can be used, but a three-side seal type, a four-side seal type,
Standing pouch formats are common in the field.

[0007] Such a pouch has the drawback of being inferior in shape retention because it is thinner and less rigid than the above-mentioned conventional shape-retaining container, but it has a property of resistance to contents and protection against chemical change of the contents. The properties can be adequately responded to by selecting the laminated structure of the material film, and the material consumption is small, light and compact, so that resources can be saved and distribution costs can be reduced. Further, disposal after use is easy.

However, pouches in the form of a bag, particularly a three-sided seal type, a four-sided seal type, and a normal gusset type, are not self-supporting, so that they are inferior in display effect at a store. There has been a problem that the contents are easily spilled when the objects are transferred.

[0009] In this respect, in the case of the standing pouch type, the problems that the display is self-supporting and the display effect and that the contents are easily spilled when opened are improved to some extent. However, since there is no rigidity and the upper part has the same form as a normal pouch, at the same time lacking shape retention and appearance as a three-dimensional container, and at the same time, after opening, if the contents are transferred,
It is difficult to supply the contents flowing out of the pouch while preventing the contents from splattering other than the part to be transferred, and there is still a problem in that the transfer is performed safely and easily.

[0010] Many proposals have been made since long ago as a device for taking out the contents in the form of a pouch. As a container for miso, mayonnaise, cream or the like, the upper part of the Japanese Utility Model Laid-Open No. 49-1324 is sealed in a mountain shape, and several discharge holes are provided in the discharge portion. This is described as a hole for dispersing and taking out the contents.

[0011] The applicant of the present invention has a refillable container,
Japanese Patent Application Laid-Open Nos. Hei 6-179461, Hei 7-285562 and many others have been filed, but the diversion as it is in the fields described above is not suitable for pouring out viscous contents or contents containing solid matter. It was not good because it caught inside the pouch.

[0012]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object the advantages of a pouch, namely, processability and preservation of contents. Utilizing features such as excellent properties, light weight, not bulky and inexpensive, and its disadvantages are the opening property of the pouring part and its shape retention, and the safety and ease of transferring contents. The task is to improve Another object of the present invention is to provide a packaging bag that is self-supporting, easy to handle, close in appearance to a shape-retaining container such as a bottle, and has an excellent display effect at stores with high productivity.

[0013]

The above objects can be attained by the present invention described below.

According to the first aspect of the present invention, there is provided a packaging bag made of a synthetic resin film whose main material is filled with viscous contents or viscous contents or solid contents. Is formed by narrowing the space between the heat seal portions from below the storage portion, and the cutout portion can be cut transversely across the spout portion. An easy-opening means is provided, and a finger-attached part by a solid seal is formed below the line to be opened by the easy-opening means and on both sides of the storage section.

[0015] Further, the packaging bag is characterized in that embossing is performed so as to converge from the bottom to the center of the spout.

In the case where the form of the packaging bag is a standing pouch, the seal pattern of the lower gusset portion may be a pattern in which the inside is formed by a curved line as used for the bottom of a normal standing pouch. A pattern in which both sides rise linearly from the bottom with a constant width with an inclination may be used.

As the easy opening means, notches such as V-shaped and one-shaped notches, which are often used in ordinary pouches, a half-cut line by laser light irradiation or the like, or a uniaxially stretched film in a pouch laminated film can be used. There is a method of laminating (in this case, the uniaxially stretched film is used so that the stretching direction thereof coincides with the opening direction of the pouring portion), and these may be used alone. Films can be used in appropriate combination such as lamination of films or notches and half-cut lines.

In the case of a half-cut line by laser light irradiation, it is possible to open without a notch, but since the half-cut line is inconspicuous, it is preferable to indicate the opening position by printing as a user's awareness.

When the half-cut line is provided, the half-cut line is not limited to a linear half-cut line, but may be an intermittent half-cut line such as a perforated line.

The number of such half-cut lines may be one. However, assuming that the tearing direction is shifted, a plurality of half-cut lines such as one each or two each are provided on both sides of the center half-cut line. Cut lines can also be provided in parallel.

By adopting such a configuration, in addition to the operation and effect of the invention described in the above-mentioned claim 1, when opening the pouring portion, tools such as scissors are not required, and desired hands can be used only by hand. The tip of the spout can be easily cut off at the position to open the spout.

Further, in the packaging bag of the present invention, a longitudinal pressing rule can be provided on the film of the main body portion of the bag including the spouting portion by a hot embossing method or the like.

For example, by providing a vertical pressing rule at the center of the protruding portion including the pouring portion, it becomes easy to bend. Therefore, when the pouring portion is opened and the contents are poured out,
The funnel shape such as the pyramid shape formed in this portion is more reliably formed, the shape retention can be further improved, and the contents can be extracted smoothly.

Further, by providing a vertical ridge line (pressed rule) on the main body portion of the bag in accordance with the seal pattern of the gusset portion, the shape of the bag after filling the contents is further stabilized by the rib effect. Thus, the shape can be formed more sharply, and the appearance can be improved.

[0025]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a film used for a packaging bag of the present invention, a method for producing the bag, and the like will be described.

First, the film used for producing the packaging bag of the present invention is not particularly limited, and any known film used for a packaging pouch for liquid contents can be used. In addition, a suitable material can be freely selected and used according to the use conditions, such as the type of contents to be filled and the presence or absence of heat treatment after filling.

As the packaging bag of the present invention, a laminated film mainly composed of plastic is mainly used. The following are typical examples of the constitution. (1) ON film / adhesive / L / LDPE film (sealant layer) (2) ON film / adhesive / uniaxially stretched HDPE film / adhesive / L / LDPE film (sealant layer) (3) ON film / adhesive / Uniaxially stretched PP film / adhesive / L·LDPE film (sealant layer) (4) ON film / adhesive / uniaxially stretched PP film / adhesive / aluminum foil / adhesive / L·LDPE film (sealant layer) (5 ) ON film (silica or alumina deposited layer) / adhesive / uniaxially stretched HDPE film / adhesive / L·LDPE
Film (sealant layer) (6) ON film / anchor coat layer / co-extrusion (HDPE layer / L-LDPE layer) (the sealant layer is L-LDPE layer) (7) ON film / anchor coat layer / co-extrusion Coat layer (HDPE layer / LDPE layer) / adhesive / L-LDP
E film (sealant layer) (8) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / L / LDPE film (sealant layer) (9) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / CPP film (sealant layer) (10) PET film / adhesive / ON film / adhesive /
Aluminum foil / adhesive / L / LDPE film (sealant layer) (11) PET film / adhesive / ON film / adhesive /
Aluminum foil / adhesive / CPP film (sealant layer) (12) PET film / adhesive / EVOH film / adhesive / ON film / adhesive / CPP film (sealant layer) Instead, various combinations of laminated films can be used.

For example, depending on the use of the bag, thin paper can be laminated on an intermediate layer such as inside the base film on the surface of the laminated film. In that case, since the whiteness is increased by the paper, the printing effect is improved, and the design property can be improved. Further, when the bag is provided with the pressing rule, the folding line is more easily attached, and the effect of the pressing rule can be further enhanced.

In the above configuration, the ON film has 2
Axial stretched nylon film, L / LDPE is linear low density polyethylene, HDPE is high density polyethylene, LDP
E is low density polyethylene, PP film is polypropylene film, PET film is biaxially stretched polyethylene terephthalate film, EVOH film is ethylene-
The saponified vinyl acetate copolymer film and the CPP film indicate an unstretched polypropylene film.

The anchor coat is a kind of primer coat which is previously coated on the substrate film side in order to improve adhesiveness when laminating a resin by extrusion coating.

In the construction of the laminated film, the ON film and the PET film provide the pouch with mechanical strength and printability as a base film, and the uniaxially stretched HDPE film and the uniaxially stretched PP film extend in the stretching direction. Is used so as to coincide with the tearing direction when the pouch is opened, whereby the tearing directionality can be further stabilized.

Then, an aluminum foil, a silica or alumina vapor-deposited layer, an EVOH film, and the like are laminated to provide gas barrier properties.

As the sealant layer, L·LDP
Two types of examples, E film and CPP film, are given.
L-LDPE film is excellent in heat seal stability and content resistance, such as stress cracking resistance to surfactants, and CPP film is excellent in heat resistance and low odor. It is suitable for packaging contents.

In the sealant layer, in addition to the above, depending on the contents to be filled, ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic ester copolymer may be used. Polymers, ionomers, polyester resins and the like can also be appropriately selected and used.

In particular, an ethylene / α-olefin copolymer obtained by polymerization using a single-site catalyst such as a metallocene catalyst has a narrow molecular weight distribution and a stable copolymerization ratio, so that the low-temperature heat sealability and Excellent in hot sealability, such as the packaging bag of the present invention, such as between the gusset portion and the body seal portion, in the sealant layer of the pouch having a step due to the difference in film overlap in the heat seal portion. Is
It is suitable because it can prevent pinholes from being generated due to missing seals.

Further, by using the copolymer blended with an olefin elastomer, the heat fluidity of the sealant layer is improved, and the generation of pinholes due to the step can be more effectively prevented.

Next, a method for manufacturing the packaging bag of the present invention using the above-described laminated film will be described.

The packaging bag of the present invention is made by heat-sealing including a gusset portion and a spout portion by using a conventional standing pouch bag-making machine (for two-row butt bag making). Produces a seal pattern such as a part in a predetermined shape, and also includes a trimming device, punching device, laser beam irradiation device (for half-cut line), etc. for forming easy-opening means such as notches and half-cut lines. The bag can be made by appropriately adding, for example, an embossing device or the like for providing a pressing rule.

FIG. 1 is a front view showing the structure of a first embodiment for packaging according to the present invention. FIG. 2 is a perspective view when FIG. 1 is opened.

In FIGS. 1 and 2, the packaging bag 1 has a housing portion 9 formed by heat welding two front and rear wall films A and B in a sealing pattern in the heat sealing portion 3.

As shown in the figure, a pouring section 2 used for pouring contents is formed at the upper center of the packaging bag 1 so as to become narrower upward from the lower part of the pouch. This is for providing the contents so as to converge to a desired place to some extent when taking out the contents, and a seal pattern (inclined seal portion 6) inclined from the seal portions on both sides of the packaging bag toward the center of the bag is formed. . If the inclination angle α is small, viscous contents and solids are caught on the way and cannot be taken out smoothly. The range of α is preferably 35 to 65 degrees. If the angle is 35 degrees or less, the above-described problem of catching occurs. If the angle exceeds 65 degrees, the efficiency of converging the contents substantially deteriorates, and the film of the packaging material is wasted. When the inclined seal is a curve, a tangent is drawn at the inner part of the seal, and the inclination angle of the tangent is preferably 35 to 65 degrees in a range of at least 30% or more.

A notch 5 is provided on the side of the packaging bag on the converging spout 2 and an opening guide wire 4 is further provided thereon. In particular, the notch may not be provided, and the initial opening position may be indicated by printing on the opening guide line 4. It is not necessary to provide the opening guide wire 4 if a uniaxially stretched film stretched in the opening direction (opening guide wire 5) in the film constituting the packaging bag 1 is laminated. It is preferable to use them.

Further, between the seal pattern inclined toward the center and the opening guide wire 4, finger attachment portions RF and L formed by a solid seal serving as a portion mainly attached when taking out the contents.
F is provided. Even if the content is heated in a hot water bath, it is relatively easy to cool this portion out of the hot water bath, so it is good to take out the content while holding this portion. For this purpose, a width of RW and a height of RH are provided above the inclined seal portion 6. This width needs to be as large as the index finger as support for the thumb and back. For this reason, the dimensions required for RW and RH may vary depending on the user, but may be RW: 2.5 cm or more and 5.5 cm or less, and RH: 3.0 cm or more and 6.5 cm or less.

If the size is not less than the upper limit, the sealing portion is increased more than necessary, and the filling limit is reduced with respect to the amount of film used, which is inefficient.

In order to make the user aware of the position of the finger press, it is preferable to indicate the position where the finger is to be placed by printing and / or embossing (not shown).

The pouring section 2 provided at the upper center of the packaging bag 1 must converge to some extent, but if it converges too much, it becomes difficult for the contents to come out. An ideal method of taking out the contents of the packaging bag will be described below.

First, the packaging bag 1 is opened along the opening guide wire 4 with the notch 5 as a trigger, with the pouring section 2 facing upward. Fingers are put on the front and back sides of the finger attachment portions RF and LF, and pushed in from both sides to open the pouring portion 2 as shown in FIG. It is formed. Since the wall film bulges outward and is spread in an inverted funnel shape such as a conical shape or a pyramid shape, the pouring portion naturally opens with good shape retention, and pouring is started. Therefore, the contents can be transferred safely and easily without blocking the pouring section during the pouring, and even if the packing bag 1 is tilted in this state, the packing bag 1 due to the weight will not move. The contents can be poured out without bending.

In the above, it is desirable to form unevenness by pressing and heating on the surface of the packaging bag by embossing so that the ridge line 7 (folded rule) is easily formed. FIG. 3 shows, as an example, a convex portion 8 represented by a net-like pattern in FIG. 3A formed so as to widen from the pouring portion 2 to both lower ends of the packaging bag 1. As a result, the user can easily bend at the position of the ridge line 7, and it is possible to prevent the packaging bag 1 from breaking when the ridge line 7 is formed at the time of discharging the contents. 3 (a) is a plan view of the embossed packaging bag of the present invention, and FIG. 3 (b) is XX in FIG. 3 (a).
FIG.

The ridge line 7 may of course be a line.
As shown in (b), the meaning of the step itself is included.
The ridge line 7 in FIGS. 4 (a) and 4 (b) is a simplified illustration of the projection 8 as shown in FIG. 3 (3).

As a method for forming the emboss, a portion to be deformed as at least a convex portion of the laminated film of the pouch is preheated, and then a press molding is performed using a male mold and a female mold having a shape corresponding to the shape of the convex portion provided on the laminated film. And cool in the mold at the same time. At this time, a vacuum and / or a pneumatic operation may be used at the time of pressing.

As the size SW of the pouring section 2, the packaging bag 1 is used.
The length LW and RW between the side portions from both side portions of the above and the length LW and RW may be 1.3 SW ≦ LW + RW ≦ 2.2 SW. Further, in order to prevent the pouch from being broken at the time of pouring, the length H from the notch 5 to the bottom of the packaging bag 1 is set.
Is preferably 1.5SW ≦ H ≦ 4.0SW.
If H exceeds 4.0 SW, the packaging bag 1 may be broken at the time of pouring due to the weight of the contents. If the width is less than 1.5 SW, it becomes difficult to deform the packaging bag when the ridge 7 is formed.

Although a flat pouch has been described above, it can be similarly used as a standing pouch. When a standing pouch is used, the way of entering the ridge line differs depending on the shape of the seal at the bottom. FIG. 4 (a)
This is a ship bottom-shaped seal pattern in which both sides rise straight from the bottom with a certain width in an inclined manner. In this case, the ridge line 7 extends from the starting point rising on the straight line to the pouring section 2.
Appears towards. FIG. 4B shows an example in which the ridge line 7 is convexly curved toward the bottom. In this case, the ridge line 7 is a seal pattern that rises vertically at both ends of the bottom. Since the appearance of the ridge line 7 is different in this manner, embossing is performed at a place more suitable for the bottom shape.

[0053]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically with reference to the drawings.

However, the present invention is not limited to these drawings. Further, the same reference numerals are used for the parts having the same names in different drawings.

Example 1 A pouring part having a layer structure similar to that of FIG. 1 using a PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / L / LDPE film (sealant layer) film. The unsealed packaging bag was made. This packaging bag is provided with three half-cut opening guide lines by laser as an easy-opening means in parallel with each other densely and at the edge of the packaging bag on the same line.
An I notch was provided. The dimensions are as follows. LW = RW = 4.0 cm SW = 5.5 cm H = 1
6.0 cm RH = 4.0 cm α = 50 degrees This is filled with curry from the spout, sealed and sealed,
After the retort treatment, the mixture was cooled at room temperature, heated in a hot water bath, and heated until the content was 85 ° C. at the center temperature. Opened from the opening guide wire triggered by the notch, put a finger on the front and back of the finger attachment part, push in from both sides, and open the spouting part as shown in FIG. 2, and from the spouting part both ends of the bottom of the packaging bag from the spouting part A ridge line 7 gentle in the direction was formed. The film on both sides up to the tip of the pouring part, that is, the wall film swells outward and is spread in a conical inverted funnel shape, and when the pouring part is naturally opened with good shape retention and turned upside down, it smoothly The contents have been dispensed.

Example 2 The ridges of Example 1 were embossed in the same manner as in FIG. Others were the same as the Example. As compared with Example 1, the opening property of the pouring part was good, and the pouring property of the contents was even better.

Example 3 The same film as in Example 1 was used to fill the contents of a standing pouch into the packaging bag shown in FIGS. 4A and 4B under the same conditions as in Example 1. did.

Example 1 was not hot even when held at the time of opening, and the outflow of the contents was smooth.

Example 2 was not hot even when held at the time of opening, ridge lines were easily formed, and the outflow of the contents was smoother than in Example 1.

Example 3 was not hot even when held at the time of opening, easily formed a ridge line, and the outflow of the contents was smoother than that of Example 1. In addition, the packaging bags were self-supporting.

[0061]

As described in detail above, according to the present invention, the spouting part is naturally opened with good shape retention,
It is possible to safely and easily transfer the contents to another container without blocking the pouring part during the pouring,
The present invention has an effect of providing a packaging bag with a pour-out portion excellent in usability, appearance, and economy with high productivity.

[Brief description of the drawings]

FIG. 1 is a front view showing the configuration of a first embodiment of a packaging bag according to the present invention.

FIG. 2 shows the packaging bag shown in FIG. 1 filled with contents, sealed, and opened.

3 (a) is a front view and FIG. 3 (b) is a sectional view showing the configuration of a second embodiment of the packaging bag of the present invention.

FIGS. 4 (a) and 4 (b) are examples of a bottom sealing form of a standing pouch showing a configuration of a third embodiment.

[Explanation of symbols]

 A, B Wall film 1 Packaging bag 2 Dispensing part 3 Heat seal part 4 Opening guide wire 5 Notch 6 Inclined seal part 7 Ridge line 8 Convex part 9 Storage part RF LF Fingering part

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Masako Hayashi 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Kenichi Yamaguchi 1-1-1, Ichigaga-cho, Shinjuku-ku, Tokyo No. 1 Dai Nippon Printing Co., Ltd. F-term (reference) 3E064 AA01 BA22 BC18 EA12 HP01 HS05

Claims (2)

[Claims] 1. A viscous content A viscous content or a solid content is filled in a packaging bag mainly made of a synthetic resin film, and the content is poured out onto the top of the packaging bag. Is formed by narrowing the space between the heat sealing portions from below the storage portion, and is provided with easy-opening means capable of crossing the pouring portion in the transverse direction and cutting off. A packing bag, characterized in that a finger attached portion by a solid seal is formed below the line to be opened by the easy opening means and on both sides of the storage portion. 2. The packaging bag according to claim 1, wherein the packaging bag is embossed so as to converge from the bottom of the packaging bag toward the center of the spout.