JPH0662174B2 - Cylindrical sealed pack with rigidity and elasticity - Google Patents

Description

TECHNICAL FIELD The present invention relates to a package formed by hermetically packaging a flowable article in a tubular container made of a packaging material film, and in particular, folding the packaging material film in two. And the overlapping portion on the opposite side to the folded portion is sealed to form a tubular body having a side seal portion, and one end portion of the tubular body is sealed to provide one end seal portion, The present invention relates to a tubular sealed pack of a fluid article in which the inner chamber is filled with a fluid object to be packaged and the other end portion is sealed to provide the other end seal portion.

[Conventional technology]

As a pack of this kind, conventionally, edible or potable liquid,
For example, soy sauce, sauce, etc. can easily be flexibly deformed by applying a slight pressing force, and even if the applied pressing force is released, the resilience to the deformation is almost zero or extremely weak. It is known that the material is hermetically packaged in a tubular container made of a material film (for example, polyethylene film), and is used for lunch boxes, lunches, and the like.

Such a conventionally known tubular sealed pack has a tear portion for opening the pack in the vicinity of one end thereof, and when the pack is torn along the tear portion, a flexible discharge port for letting out contents is discharged. Is being opened.

[Problems to be solved by the invention]

In the conventionally known cylindrical sealed pack of this type, as described above, since the packaging container for the contents is extremely poor in elasticity and made of a flexible packaging material film, it is wrapped in this. When a liquid that is a material is filled, it flexibly deforms in accordance with the amount and movement of the liquid, and as a result, the entire pack has no hardness or stiffness, and if you use a sensory expression, when you hold it by hand, If you give such a "soft and fluffy" soft feel, and if you open and discharge the entire contents, the empty container will shrink and it will be compressed into a flat shape so that the opposing peripheral walls contact each other. It is generally deformed. As a result, the previously known pack has various drawbacks as listed below.

I. Even if you touch it lightly with your fingertips, the pack easily compresses and deforms and transmits pressure to the contents.Therefore, when holding the pack with one hand and tearing it with your other fingertip to open, open the package with soy sauce. Due to the pressure applied, the liquid is abruptly ejected and scattered to stain hands, clothes, and the like, or the liquid is likely to flow out at once.

B. Even if the pressure is released by releasing the fingertip after pressing and compressing and deforming the pack, the original shape of the pack is not restored or the restoring speed against deformation is extremely slow, and the discharge port of the contents formed by opening the pack Since the part is also flexible and easily deformed, it is difficult to control or adjust the discharge amount of the contents by the pumping operation of the pack with the fingertip even after the discharge port formed after opening is relatively small.
As a result, it is difficult to take out the desired amount of the content depending on the intended use, and it is easy to cause inconvenience such as uneconomical due to overloading and failure of seasoning, and when taking out the remaining amount. In addition, since the compressed and deformed pack must be squeezed out by squeezing it with a fingertip, inconveniences such as troublesome work and soiling of the hand are likely to occur.

C. Since the whole pack is flexible and easily deformed irregularly, when a large number of packs are stacked or bundled, the irregular deformation does not make the whole volume constant, and as a result, a constant volume. Not only is it difficult to orderly store the product in a packaging box or the like having the above, but also when packaged and transported, so-called product misalignment may occur along the way, resulting in the inconvenience of lowering the commercial value.

D. Since the container itself is flexible and easily deformed, it is difficult to fill and seal the contents, and the efficiency of the filling process is not good.

The present invention has been made to solve the above-mentioned problems of the prior art.

[Structure of Invention]

In order to overcome the problem, the present invention folds the packaging material film into two folds, forms a tubular body having a side seal portion by sealing the overlapping portion on the opposite side of the folded portion, and the tubular body One end seal part is provided by sealing one end part of the fluid food, and then the inner chamber is filled with the fluid packaged object, and the other end part is sealed and the other end seal part is provided. In a tubular sealed pack, the tubular body is formed of a packaging material film having both rigidity and elasticity so that the pack can be pumped with a fingertip by imparting rigidity and elasticity to the pack. One of the end seal portions is formed on the folded portion side of the tubular body so as to define a closed passage communicating with the inner chamber thereof. Open the pack in place At least one provided a tear portion of the order, tearing the pack along the tear portion, the sealed passage is elastically opening, said those configured such that the discharge passage of the packaged articles.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings showing an embodiment thereof.

The same reference numerals are given to the same parts throughout the drawings.

[First Embodiment] FIGS. 1 to 6 show a first embodiment of the present invention, in which P is a cylindrical sealed pack according to the first embodiment, and the pack P is The packaging material film is folded back in two, the overlapping portion 2 on the opposite side of the folding portion 1 is sealed to form a tubular body having a side seal portion 3, and the lower end portion of the tubular body is sealed. A lower end seal portion 4 is provided, and then an inner chamber 5 formed thereby is filled with a fluid packaged object 6 such as soy sauce, and then the upper end portion of the tubular body is sealed to provide an upper end seal portion. 7 is provided. The upper end seal portion 7 is formed so that a closed passage 8 communicating with the inner chamber 6 is defined on the side of the folded portion 1 of the tubular body. Then, the pack P is provided on the side of the end seal portion 7 with the closed passage 8
In, a plurality of tear portions a, b, c for opening are provided from the side edge of the side seal portion 3 in a direction orthogonal to the axis of the closed passage 8. In the illustrated example, each of the tear portions a, b, and c is a cut, that is, a cut, but they may be formed by perforations, weakened lines, or the like. Also, as shown in FIG. 1, the closed passage 8 has a tapered shape, and the corner portion 8 ′ of the inlet thereof has inner corners of the horizontal shoulder portion 9 of the inner chamber 5. It is formed into a round shape by rounding the part, and its cross-sectional shape is an ellipse or an oval with a V-shaped inside. Therefore, the tear portions a, b, c
By tearing the pack P along any of the above, it is possible to open an opening a ', b'or c'of the desired diameter in the closed passage 8 in its cross section.

As is clear from FIGS. 1 to 4, the tearing portions a, b,
The upper end seal portion 7 having c is longer than the lower end seal portion 4 forming the bottom portion of the pack P in the axial direction of the pack P, and the sealed passage 8 is tapered.
And including a region adjacent to the shoulder portion 9 of the inner chamber 5,
Therefore, it has a much wider area than the latter 4, and it is easy to pick with the fingertip when opening the pack P.
Then, the overlapping portion 2 of the packaging material film folded in two
The side-seal portion 3 formed by sealing the opposing surfaces of each other with each other has a considerably wide lateral width and is formed along the plane passing through the axis of the pack P, as can be seen from FIGS. 1 and 2. It extends straight along the entire length.

Therefore, the side seal portion 3 functions as a tubular side container portion 5 ′ defined by the side seal portion 3 and the end seal portions 4 and 7, and thus also as a reinforcing side plate portion for strengthening the pack P as a whole. The reinforcing function of the side seal portion 3 is such that, for example, a thin and rigid reinforcing material (not shown) is inserted between the overlapping portions 2, and the overlapping portion 2 and the reinforcing material sandwiched by the overlapping portion 2 are inserted. If the side seal is applied to the body, it will be further enhanced.

The packaging material film, which is the material of the tubular closed pack according to the present invention, must have both rigidity and elasticity. Specifically, at least the tubular container portion 5 ′ formed thereby has at least the contents. The strength of the waist does not deform due to the weight of a fluid item, or when it is held by hand, and its peripheral wall allows it to be easily pumped with a fingertip like a dropper. And the elastic modulus must be able to be imparted to the cylindrical container portion 5 '.

Next, an example of a packaging material film suitable for carrying out the present invention will be described with reference to FIG. 6 which is an enlarged cross-sectional view of the above embodiment.

As shown in FIG. 6, the packaging material film, which is the material of the embodiment pack, is a five-layered structure in which a polyethylene film 10, a nylon film 11, a polypropylene film 12, a vinylon film 13 and a polyester film 14 are laminated and laminated. It is made of a plastic laminate film having the above laminated structure and can sufficiently satisfy the above-mentioned requirements.

The laminated film having a laminated structure of 5 layers is folded back in two so that both side portions of the polyethylene film 10 overlap with each other against the elasticity thereof, and the facing overlapping portion 2 on the opposite side of the folded portion 1 is And a relatively wide side seal portion 3 is formed by heat sealing to form a tubular body having the polyethylene film 10 as an inner wall layer and the polyester film 14 as an outer wall layer. Widely heat seal the lower end of the strip in the transverse direction to provide a lower end seal 4
Next, the inner chamber 5 thus formed is filled with the fluid packaged object 6, and finally the upper end of the tubular body is heat-sealed in the above-described manner to provide the upper end seal portion 7. As a result, a pack P in which the fluid container 6 is hermetically sealed in the tubular container portion 5'is completed.

In this case, the outer four layers of the laminated film constituting the peripheral wall of the tubular container portion 5'are polyester films 14 having excellent mechanical properties in terms of rigidity and elasticity,
The polyester film 14, which is composed of vinylon film 13, polypropylene film 12 and nylon film 11, and which forms the outer wall layer of the film, has the highest tensile strength among these films, is hard and strong, and has a surface hardness. It is also high in abrasion resistance and has a large elastic modulus, so that both sides of the polyethylene film 10 which is a heat-welding soft synthetic resin film overlap each other against the elasticity of the laminate film. When the sheet is folded back in two and the opposite polymerized portion 2 on the opposite side of the folded portion 1 is heat-sealed, a strong bending load is applied particularly to the outer four layers, and the bending stress, that is, the tensile stress is correspondingly applied. A compressive stress is generated, and as a result, the tubular body is imparted with strong rigidity and elasticity. Not only this, the tubular body to which strong rigidity and elasticity are imparted in this way is subjected to heat seal processing on the opening portions at both ends in the subsequent process, so that the upper and lower end seals thereof are sealed. Since new tensile stress and new compressive stress are generated in the peripheral wall portions respectively close to the portions 4 and 7, their rigidity and elasticity are further strengthened, and as a result,
A peripheral wall of the cylindrical container portion 5 ′ defined by the side seal portion 3 and the end seal portions 4 and 7 has a cross section that is sufficiently rigid and elastic enough to perform a pumping operation with fingers. It will be given an egg-shaped shell structure.

Furthermore, since the upper end seal portion 7 elastically retains the film portion adjacent to the folded portion 1 where the strongest bending stress is formed by folding the laminated film and thus forms the closed passage 8. The peripheral wall portion of the closed passage 8 is provided with a shell structure having a substantially oval cross section which is stronger and more elastic than the middle portion of the peripheral wall of the cylindrical container portion 5 '.

Incidentally, the major axis in the cross section of the tubular container portion 5'of the embodiment pack P, that is, its width is about 1.7 cm, and the polyethylene film 10, the nylon film 11, and the polypropylene film 12 which compose the laminate film. , Vinylon film 13 and polyester film 14 are 40μ, 15μ, and 25μ, respectively.
The thickness is about μ, 15 μ, and 12 μ. Of these films, the rear four members 11, 12, 13, and 14 constituting the outer four layers of the peripheral wall of the cylindrical container portion 5'are all stretched films, and therefore have high mechanical strength. Needless to say, since each has excellent chemical properties, these excellent properties complement the shortcomings of each chemical property and are excellent in terms of water resistance, moisture resistance, chemical resistance, etc. Dust with the polyethylene film 10 also imparts excellent barrier properties, stability and other chemical properties to the laminate film. Therefore, the laminated film is extremely suitable for use in a pack of liquid such as soy sauce containing acid, alkali and the like.

[Unpacking and operation of the first embodiment pack] When unpacking the pack P, the appropriate position of the upper end seal portion 7 is held by the fingertip of one hand, and the tearing portions a, b, c are held by the fingertip of the other hand. By tearing the pack P in the transverse direction along the ridge, the opening a ', b'or c'having a desired diameter is provided in the closed passage 8 without discharging the contents.
Can be opened. Since the closed passage 8 is formed in a tapered shape as described above, if the pack is torn along the upper tearing portion a near the tip end thereof by using the fingertip as described above, the opening a of the minimum diameter is formed. ', And tear the pack along the lower tear portion c near its inlet, tearing the pack along the largest diameter opening c'and also along the middle tear portion b near its middle portion. For example, it is possible to open openings b'having an intermediate diameter larger than the former a'and smaller than the latter c '.

When the pack P is unsealed as described above, the closed passage 8 is opened and serves as a discharge passage for guiding the contents 6 in the inner chamber 5 communicating therewith to the outside. In this case, since the discharge passage has a tapered shape like a nozzle, the length thereof increases / decreases in inverse proportion to the increase / decrease of the opening diameter. Since the peripheral wall portion of the discharge passage is provided with the shell structure which is extremely firm and elastic as described above, the opening shape thereof is elastically retained.

The contents 6 of the pack P opened as described above are taken out by discharging the contents by its own weight as in the conventional pack of this kind or by squeezing out the pack in a compressed and deformed state. Instead, the contents are opened by a nozzle opening a ', b'or c'by a pumping operation of pushing or releasing the peripheral wall of the cylindrical container portion 5'having both rigidity and elasticity as described above. It is performed by ejecting from. Next, the case where the content 6 of the pack P is soy sauce will be described as an example.

First, regarding the case where the opening a'is selected, the discharge passage formed in that case is the longest as compared with the case where the other openings b'and c'are selected, and the opening diameter is the smallest. Assuming that the pressure applied when performing the pumping operation is constant, the jetting speed of soy sauce by one pumping operation becomes maximum compared to the case where other openings b ′, c ′ are selected, The amount of soy sauce discharged by the pumping operation is minimized. Next, regarding the case where the opening b ′ is selected, the discharge passage becomes shorter and the opening diameter becomes larger than in the above case, so that the soy sauce ejection speed is reduced by one pinping operation under the above conditions, The discharge amount is larger than that in the above case.
When the opening c ′ is selected, for the same reason, the amount of soy sauce discharged by one pumping operation under the above conditions is further increased as compared with the case where the opening b ′ is selected. In any case, it goes without saying that the discharge amount can be controlled by adjusting the pressing force with the fingertip.

Which of the openings a ', b', and c'is to be selected is a matter to be appropriately decided by the user according to the kind, property, required amount of use, target of use, etc. of the contents.
When the content is soy sauce and it is used by directly sprinkling it on a portable food such as a bento box, it is sufficient to select the opening a ′ that can adjust the discharge amount most delicately.
Further, when soy sauce is once taken out into a container such as a small plate and used, the discharge amount is larger than that of the opening a ', and therefore the opening b'or c'that can be discharged quickly can be selected. is there. If, by mistake, the soy sauce is poured too much into a container such as a small plate, the discharge passage opening a ', b'or c'in the container is compressed and deformed. When the pressure applied by the fingertip to the pack P that has been pressed into soy sauce and compressed and deformed is released, the inside of the pack, which has a negative pressure, quickly returns to its original shape due to its elasticity, and with the restoration, the dropper and ink drop. Since soy sauce is sucked in so as to suck the soybeans and the like, it is possible to return the excess amount to the pack by an operation reverse to the operation for discharging. Such a conventional pack cannot perform such a pumping operation.

[Second Embodiment] FIG. 7 shows a second embodiment of the present invention. In this embodiment, the tear portion a in the first embodiment is described.
Is provided with only one tearing portion a, the shoulder portion 9 of the cylindrical container portion 5 ′ extends obliquely downward, and the closed passage 8 is formed.
The upper end seal part 7 is heat-sealed so that the inlet corner 8'of the upper end seal part 7 is rounded with a relatively large radius of curvature, and the hanging hole 1 is formed in the end seal part 7.
6 is different from the first embodiment in three points, but other points are substantially the same as the latter. In the second embodiment, the inlet loss when discharging the content 6 such as soy sauce can be reduced to a minimum in accordance with the above-mentioned configuration, and a large number of hanging holes 16 are used. There is an advantage that the pack P can be suspended or bound.

In addition, also in the second embodiment, similar to the case of the first embodiment, in addition to the tearing portion a, other tearing portions b and c can be provided, and one is provided substantially parallel to the inclined shoulder portion. Alternatively, a plurality of tear parts (not shown) may be provided and the pack P
When opened, the tip may be tapered.

In each of the first and second embodiments described above, in addition to a liquid having a relatively low viscosity such as soy sauce, a fluid article having a relatively high viscosity such as a dressing can be used as the content. It goes without saying that you can do it.

When the contents of the first and second embodiments are liquids each having a relatively low viscosity such as soy sauce, the flow of the liquid discharged by the pumping operation after opening is different. See Fig. 8 and 9
In the figure, each is shown by a streamline. In any case, the inner chamber 5 and the discharge passage 8 are linearly connected to each other in the axial direction on the side of the folded portion 1, while the corner portion 8'of the passage inlet on the opposite side to the folded portion 1 is formed. Since consideration is given to reducing the inlet loss as a whole, the flow of the liquid becomes extremely smooth as shown in FIGS. 8 and 9.

In each of the embodiments, the width of the passage 8 in the major axis direction is 1/3 or less of the major axis of the inner chamber 5,
When making a pack having the above-mentioned structure using a packaging material film having both the rigidity and elasticity as described above, it is possible to perform the pumping operation of the pack even if the former is about half of the latter. Has been proven.

Since the two embodiments described above are merely listed as the preferred embodiments of the present invention, the present invention is not limited to these embodiments and may be implemented by appropriately modifying them. In particular, with regard to the plastic laminate film, it is possible to appropriately increase, decrease, change, etc. the constituent film according to the type, property, etc. of the contents.

〔The invention's effect〕

As described above, according to the present invention, the packaging material film is folded back in two, and the overlapping portion on the opposite side of the folding portion is sealed to form a tubular body having a side seal portion, and One end of the tubular body is sealed to provide one end seal part, and then the inner chamber is filled with a fluid packaged object, and the other end is sealed to provide the other end seal part. In a tubular sealed pack of a fluid article, the tubular body is formed of a packaging film having both rigidity and elasticity so that the pack can be pumped with a fingertip by imparting rigidity and elasticity to the pack. , One of the end seal portions of the tubular body is formed so that a closed passage communicating with the inner chamber is defined on the folded portion side of the tubular body, and the end that defines the closed passage is formed. Put the pad in the proper position on the seal side. At least one tearing portion for opening the package is provided, and when the pack is torn along the tearing portion, the closed passage is elastically opened, and serves as a discharge passage for the packaged object. In addition, it is possible to effectively solve the various problems of the above-mentioned prior art, and to provide a pack that can control the discharge amount of the contents by a pumping operation at a low cost.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention,
1 is its front view, FIG. 2 is its left side view, FIG. 3 is its right side view, FIG. 4 is an enlarged vertical sectional view taken along the line AA ′ of FIG. 1, and FIG. 5 is a pack. FIG. 6 is an enlarged plan view in a state in which the package is opened, FIG. 6 is an enlarged cross-sectional view taken along the line BB ′ of FIG. 1, FIG. 7 is a front view of another embodiment of the present invention, and FIG. 8 is the first embodiment. A streamline diagram showing the flow of liquid in the usage state of the example,
FIG. 9 is a streamline diagram showing the flow of liquid in the use state of the second embodiment. In the drawings, 1 is a folded portion, 2 is an overlapping portion, 3 is a side seal portion, 4 is one end seal portion, 5 is an inner chamber,
5'is a tubular container part, 6 is contents, 7 is the other end seal part, 8 is a closed passage, 8'is an inlet corner of the passage, 9 is a shoulder portion, 10 is a polyethylene film, 11 is nylon. The film, 12 is a polypropylene film, 13 is a vinylon film, 14 is a polyester film, a, b and c are tear portions, and a ', b'and c'are openings.

Claims (17)

[Claims] 1. A packaging material film is folded back in two, and a superposed portion on the side opposite to the folded back portion is sealed to form a tubular body having a side seal portion, and one end portion of the tubular body is sealed. To provide one end seal part, and then
After filling the inner chamber with a fluid packaged object, in a tubular sealed pack of a fluid article having the other end sealed to provide the other end seal portion, by imparting rigidity and elasticity to the pack, The tubular body is formed of a packaging material film having both rigidity and elasticity so that the pack pumping operation can be performed with a fingertip, and one of the end seal portions of the tubular body is folded back. The side is formed so as to define a closed passage communicating with the inner chamber, and at least one tearing portion for opening the pack is provided at a proper position on the end seal portion side that defines the closed passage. A tubular closed pack, characterized in that when the pack is torn along the tearing portion, the closed passage is elastically opened to serve as a discharge passage for the packaged object. 2. The cylindrical sealed pack according to claim 1, wherein one end seal portion defining the closed passage is longer than the other end seal portion in the axial direction of the pack. . 3. The tubular sealed pack according to claim 1, wherein the closed passage has a substantially oval cross section. 4. The cylindrical hermetic pack according to claim 1, 2, or 3, wherein the hermetically sealed passage is formed in a tapered shape. 5. The tubular sealed pack according to claim 1 or 4, wherein the corners of the inlet of the sealed passage are rounded. 6. A structure according to claim 4, wherein a plurality of tear portions are provided, and the pack is torn along any of the tear portions so that an opening having a desired diameter can be opened in the closed passage. The cylindrical sealed pack according to item. 7. The tearing portion is formed by a cut or perforation provided in a direction perpendicular to the axis of the closed passage from the side edge of the side seal portion. The cylindrical sealed pack according to any one of items 1 to 6. 8. The first or second aspect of the present invention, wherein the tearing portion is a cut or perforation provided in a direction diagonally intersecting the axis of the closed passage from the side edge of the side seal portion. Any one of items 3 to 6
The cylindrical sealed pack according to item. 9. The side seal part is provided with a relatively wide lateral width so that the side seal part can function as a reinforcing side plate part for strengthening the pack, and the side seal part is completely sealed over the entire length thereof to form a pack. The tubular sealed pack according to claim 1, wherein the cylindrical sealed pack is extended in a straight line along the axis. 10. A reinforcing material is inserted between the overlapping portions of the packaging material film, and a side seal is integrally formed on the overlapping portion and the reinforcing material. The cylindrical sealed pack according to item. 11. The tubular article according to claim 1, wherein the packaging material film has a laminated structure formed by laminating a plurality of packaging material films having different physical properties from each other. Sealed pack. 12. The packaging material film has a laminated structure containing a plurality of hard synthetic resin films, and at least the film forming the inner layer of the tubular body is a heat-welding synthetic resin film. The tubular sealed pack according to claim 1. 13. The packaging film according to claim 11 or 12, wherein the packaging film is transparent or translucent, and is excellent in mechanical strength and barrier properties. Cylindrical sealed pack. 14. A film which constitutes an inner layer of a tubular body is formed of a heat-welding synthetic resin film which also has chemical resistance such as acid resistance and alkali resistance. The tubular sealed pack according to item 13. 15. A packaging material film having a laminated structure of 5 layers, of which the film constituting the outer 4 layers of the tubular body is a hard synthetic material having high mechanical strength such as hardness and waist strength. The tubular sealed pack according to any one of claims 11 to 14, which is a resin film. 16. A wrapping material film is a polyester film, a vinylon film, a polypropylene film,
The tubular sealed pack according to claim 1, which has a laminated structure of five layers formed by sequentially laminating a nylon film and a polyethylene film. 17. The tubular hermetically sealed pack according to claim 1, wherein the seals at the side seal portion and each end seal portion are heat seals.