JP2004090937A - Packaging container with easily discriminative tear-open cut - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary means with which an opening mouth of a baglike and molded packaging container of a plastic wrapper can be easily discriminated and the container can be easily opened. <P>SOLUTION: An uneven portion surrounding the outer periphery of a tear-open cut formed on the external end surface of a seal which is fusion-bonded and sealed is formed as the opening mouth of a packaging container such as a bag, a skin pack and a drawn package of the plastic wrapper. The tear-open cut can be found by checking the uneven portion by the touch of fingertips. The cut can be easily known visually as colors on the seal and the uneven portion differ by surface finishing of male and female molds forming the uneven portion, so that the package can be easily opened. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention mainly provides confectionery, food products, processed meat products, retort food products, medical products, and the like. The present invention relates to a packaging container that can be easily identified.
[0002]
[Prior art]
As a packaging container for confectionery, food, processed meat, retort food, medical products, etc., a two-sided, three-sided, or four-sided sealed bag made of multilayer plastic film, or a multilayer plastic film with vacuum Packaging containers such as deep-drawing packaging by molding or pressure forming or skin packs are often used.
[0003]
As a method for opening the packaging container without using scissors or a knife such as a cutter knife, a bag-shaped packaging container is provided with a saw-toothed shape at the tip end of the peripheral edge welding portion of the bag. A saw tooth cut, a V-shaped cut with a V-shaped cut, a linear cut notch, or the like is provided.
[0004]
In addition, as a method of opening a deep-drawing package or a package container by a skin pack, a part of a flange welded portion of a molded package container is provided with an unbonded portion or a weakly bonded portion for opening, or a package. A peelable lid material is used to facilitate opening of the flange welding of the container.
[0005]
As described above, the V-shaped cut, the saw-tooth cut, the linear notch, etc. formed in the welded portion at the peripheral edge of the bag in the bag-shaped packaging container do not cause deterioration in the tensile strength, pressure resistance, etc. of the welded portion. As described above, the welding portion is provided with a slightly smaller welding width.
[0006]
For this reason, the cut portion or the notch is very difficult to see, and the user is looking for the unsealed portion when unsealing. In addition, when opening from the cut portion or the notch, it may be difficult to cut due to the packaging material or material configuration of the packaging container, and a considerable force may be required.
[0007]
In addition, in order to search for a V-shaped cut or a saw-tooth cut, a linear notch, etc. provided on the peripheral edge of the welded seal portion of the bag, a fingertip is applied to the outer peripheral end surface of the welded seal portion of the bag. There is a problem that a blind person may damage his fingertips while he is searching for the opening.
[0008]
In addition, the outer peripheral edge of the molded portion is welded to the deep drawn package or the package container made of the skin pack, and a peelable heat seal resin layer is provided at the welded portion between the lid material and the container so that the package can be easily opened, or the package is opened. An unsealed portion or a weakly adhered portion is provided in a part of the packaging container as the cutout portion, and the opening cutout portion is displayed by slightly changing the size of the lid material and the container, and the lid material is easily picked.
[0009]
However, the notch for opening is also almost the same color as the welded part, making it difficult to find, and the lid material shrinks because the tip of the lid material and the container with a slightly different size are also heat sealed. It is very difficult to determine the opening notch.
[0010]
In addition, in order to make the opening notch part easily understandable to the consumer, red or white printing is applied in a drop shape to a small portion of the lid material or a part of the container. Furthermore, the printed color is symmetrical to the printed color and is printed with a small “open mouth” or the like, but there are many deep-drawing packaging containers and skin packs that are very difficult to understand.
[0011]
[Problems to be solved by the invention]
As described above, when opening the packaging container, the opening notch is mostly found by visual means, but is very difficult to find. In addition, an elderly or visually impaired person may damage a fingertip or the like at the end face of the packaging container while putting his / her finger on the end face of the welded portion of the packaging container and searching for the cutout for opening.
[0012]
Also, even if you know the notch for opening and try to open it, even if it is a healthy person, if it is difficult to open due to the material of the packaging container or the structure and structure of the welding part, the notch for opening the packaging container Using a cutter knife, scissors, or the like without opening from the part or the place where "open mouth" is printed, the hand may be damaged.
[0013]
Further, when an "opening" is found and an attempt is made to open the lid of the container, "opening" is printed, and the portion that is not welded is so narrow that it is difficult to grasp, and it is very difficult to open it.
[0014]
For this purpose, the seal between the container and the lid material is subjected to a peelable seal process so that the lid material of the packaging container can be easily opened.
[0015]
However, since there is a significant pressure difference between the inside and outside of the container due to heat sterilization of the contents and the accompanying cooling treatment process, there is a problem that the reliability of the hermetic seal is lacking in the heat seal using only the peelable seal interface. .
[0016]
Originally, when removing items packaged in a deep-drawing packaging container or skin pack that has a peelable seal, pick a small part of the lid that is printed with the "opening opening" that is the opening part. In order to open the lid by pulling the lid with considerable force, the stored items often fall.
[0017]
In addition, easy peel packaging containers require various measures such as material composition and packaging container structure, so deep drawing packaging containers and skin packs, for which the lid of the packaging container is difficult to open easily, are required. Many.
[0018]
For this reason, in many cases, the lid material is cut with a cutter knife or a kitchen knife, etc., and the stored material is often taken out from the contour of the stored material on the inner peripheral edge where the container and the lid material are welded. There is.
[0019]
For this purpose, an elderly or visually impaired person puts a fingertip on a part of a packaging container or a flat part (seal surface) of a welded portion to identify a packaged container or an opening cutout or the like. However, many proposals have been made, such as described in Japanese Utility Model Application Laid-Open No. 61-172030 and Japanese Patent Application Laid-Open No. 2000-15354.
[0020]
In Japanese Utility Model Publication No. 61-172030, a powdered drug is put in a bag, a cutout is provided at a welded portion at an edge of the bag to facilitate opening, and letterpress Braille is provided on both sides of the cutout. Packaging containers have been proposed that form and identify the "opening" of the powdered medicament.
[0021]
However, letterpress Braille is formed in a convex shape by pressing both sides of the cutout portion of the welded portion, so that the cutout portion provided in the welded portion is cracked and the bag surface other than the welded portion is formed. There is a problem to damage.
[0022]
In addition, since it is formed into a letterpress shape by engraving on both sides of the cut portion, the flat welded seal portion at the peripheral edge is in a corrugated state, and the packaging suitability of the filling and packaging machine for filling the stored items is significantly reduced. There is.
[0023]
Japanese Patent Application Laid-Open No. 2000-15354 discloses a method for providing a concave / convex portion which can be identified with a fingertip on both sides of an opening cutout portion of a bag-shaped packaging container. It has been proposed to open it in the center of the box.
[0024]
However, by forming the uneven portions on both sides of the cut portion formed in the welded seal portion, the periphery of the uneven portion is pulled and small wrinkles are generated at the same time, and the cut portion is also cracked, and the bag surface other than the welded seal portion is formed. There is a problem to damage. Further, since the welding seal portion on the outer peripheral edge of the uneven portion is in a corrugated state, suitability for an automatic packaging machine and the like is significantly reduced.
[0025]
Also, Japanese Patent Application Laid-Open No. 2000-15354 describes that holes are provided in a part of a bag-shaped packaging container on both sides of an opening notch, instead of the concave and convex portions identified by fingertips. However, in such a bag-shaped packaging container, by providing holes on both sides of the cut portion so as to be discernable with a fingertip in a small width of the welded seal portion, the seal strength of the welded seal portion around the cut portion is significantly reduced. There's a problem.
[0026]
In addition, when the bag is boiled to cook the contents, the bag becomes taut (expanded), and the hole of the hole to be identified becomes wrinkled. Since the welded seal portion of the portion shrinks into a wavy shape, liquid leakage of contents and the like may occur from the welded portion during distribution.
[0027]
Further, Japanese Unexamined Patent Publication No. 61-172030 and Japanese Patent Application Laid-Open No. 2000-15354 disclose irregularities or protrusions on both sides of a bag-shaped packaging container, such as a linear notch which is an opening cutout, which can be identified by the touch of a fingertip. A substantially similar purpose and problem arises in that a braille in the shape of a letter is formed and identified.
[0028]
In particular, the bag-shaped packaging container described in JP-A-2000-15354 has an irregularity formed on both sides such as a linear notch which is an opening cutout. A notch for the linear notch, etc., has a convex shape for Braille on both sides, and the points identified by the feel of the fingertips match, and the linear notch of the welded portion is formed by forming an uneven portion or convex shape. As a result, the welded portion may be cracked in the seal width direction or a pinhole may be formed.
[0029]
In addition, when a large number of stored items are packed in a bag-like packaging container with several levels of bag-like packaging containers with stress applied to the linear notch and distributed in a box, damage occurs from the linear notch for opening during distribution and May be damaged.
[0030]
As described above, many proposals have been made regarding the opening of the packaging container of the present invention. However, in any case, the provision of unevenness that can be identified by the feel of a fingertip deteriorates the workability of filling the stored item and protects the stored item. However, there is a problem that the function as a packaging container to be maintained or maintained in quality is such that the quality of the stored product is deteriorated due to the damage of the bag from the welded seal portion or the deterioration of the strength of the seal portion. . There is also a problem that the packaging container is damaged by the distribution of the packaging container filled with the stored items. In view of these problems, the present invention is intended to enable anyone to easily open a packaging container without any damage to the packaging container even at the time of distribution.
[0031]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention firstly provides a packaging container having an opening notch for putting confectionery, processed food, cooked food, processed meat, medical product, and the like. An easily identifiable packaging container with a notch for opening, characterized by forming an uneven portion surrounding an outer peripheral edge of the notch for opening of the packaging container.
[0032]
Next, the invention according to claim 2 of the present invention is the sealing bag according to claim 1, wherein the packaging container has a welded portion, and the uneven portion surrounding the outer peripheral edge of the cutout portion for opening at the welded portion. The packaging container according to claim 1, wherein the packaging container has a notch portion for easy opening.
[0033]
Further, the invention according to claim 3 of the present invention is the sealed packaging container according to claim 1, wherein the packaging container has a welded portion, and the opening for opening is an unbonded portion or a weakly bonded portion. An easily identifiable packaging container with a notch for opening, characterized in that an uneven portion is formed substantially at the center.
[0034]
BEST MODE FOR CARRYING OUT THE INVENTION
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A package container with a notch for easy opening according to the present invention will be described in detail below with reference to the drawings according to embodiments. 1 to 3 show one embodiment of the present invention. FIG. 1A is a front view showing a bag-shaped packaging container having a cutout for opening having irregularities for identification according to the present invention, and FIG. 1B is a cross-sectional view taken along the line AA ′ of FIG. FIG. 1C is a cross-sectional view showing a cross section taken along the line BB ′ of FIG. 1A, and FIG. 1D is a view of FIG. FIG. 1 (e) is an explanatory view showing the shape, FIG. 1 (e) is an explanatory view showing another shape of the opening notch (S) having the unevenness of identification in FIG. 1 (a), and FIG. FIG. 2 (a) is an explanatory view showing another shape of an opening notch (S) having identification irregularities, and FIG. 2 (a) is a plan view showing a bag-shaped packaging container with an opening notch having identification irregularities according to the present invention; 2B is a sectional view showing a section taken along the line CC ′ of FIG. 2A, FIG. 2C is an enlarged sectional view showing an enlarged section M of FIG. 2B, and FIG. According to the unevenness It is an explanatory view showing a working state of the production process of the cut portion with bag-shaped packaging container opening having.
[0035]
The bag-shaped packaging container according to the present invention is a flat bag with a two-sided or three-sided seal that seals the top and bottom (top and bottom) of the tubular film, or a pillow-shaped three-sided seal, or a four-sided top, bottom, left, and right side of the bag. A notch S for opening has conventionally been formed in a welded portion 2 such as a four-side seal bag to be sealed. (FIG. 4)
[0036]
4 (a to 4d) are frequently used as the shape of the cutout portion S for opening provided in the welding portion 2, and among them, a linear notch shown in FIG. 4 (a) is often used.
[0037]
Further, as the cutout portion S for opening a part of the welded portion 2 as shown in FIG. 4 (b-d), a cutout portion (b) for V-shaped opening, a cutout portion for U-shaped opening (c), as shown in FIGS. An opening notch (d) having a triangular tip or a serrated opening notch for opening is provided to facilitate opening.
[0038]
As shown in FIG. 1, the uneven portion 12 is formed on the opening notch S, so that a visually impaired person or a person with weak vision, even a healthy person, can touch the flat part of the welding part 2 with a fingertip. The opening notch can be easily identified just by touching it.
[0039]
The projections and depressions 12 are formed by a male die and a female die, and a projection is formed on one of the front and back sides on the opening notch S of the welding part 2 and a depression is formed on the other.
[0040]
For this reason, when the flat part of the welded part 2 is touched with two fingertips to find the notch S for opening, one fingertip touches the convex part and the other finger touches the concave part. The notch S for opening can be easily confirmed.
[0041]
Further, when the male and female molds are heated at the time of forming the concave and convex portions 12, a difference in color from the welded portion 2 occurs, so that the opening cutout S can be easily found even by visual means. .
[0042]
Further, by providing a pattern different from a mesh-like or knurl-like pattern provided on the surface of the seal bar on the surface of the male and female molds of the concavo-convex portion 12, it is provided on the welding portion 2 and the opening cutout. Since the color of the uneven portion 12 becomes clear, the opening notch S can be easily identified.
[0043]
Further, depending on the temperature at which the male mold and the female mold for providing the concave and convex portions 12 are heated, the opening from the opening notch S can be opened with a weak force.
[0044]
Further, the bag 36 is filled and sealed with the package 36, and the bag 36 is damaged from the opening notch S in the course of the boxing operation or distribution, and the package 36 jumps out for a purpose other than the opening. In some cases, the container 36 may be damaged due to damage or damage. However, since the male and female molds for forming the concave and convex portions 12 are heated to form the concave and convex portions 12, the leading end of the opening portion is hardened. In addition, the progress of a crack from a linear notch or the like provided in the opening cutout portion S of the welded portion 2 is prevented.
[0045]
The opening notch S of the welding portion 2 is formed into a block shape of about 50 to 150 pieces formed in a bag shape using a machine for forming the opening notch S, or is welded on a bag making machine. Whether to form the opening notch S during the bag making process is selected depending on the shape and size of the bag-shaped packaging container 1, a bag making machine, and the like.
[0046]
An opening notch S is provided inward from the outer end of the welded portion 2, and a concave and convex portion 12 is formed on the opening notch S by a male mold and a female mold as shown in FIGS. 1 (a) to 1 (e). A semicircular shape or the like is formed at a substantially central portion on the opening notch S.
[0047]
Further, the depth (h) formed in the semi-circular shape or the like provided on the opening cutout S of the welding portion 2 in FIG. 1B is about 0.2 mm to 3 mm, and the size is 1 mm. The depth and size of the concave and convex portion 12 vary depending on the size of the bag and the seal width of the welded portion 2 where the opening cutout S is formed.
[0048]
FIGS. 1D to 1F show a linear notch (a), a V-shaped cut (d), a U-shaped cut (e), and a spear-shaped cut on the welded portion 2 of the three-side seal flat bag. An uneven portion 12 is formed on the (f) and the like by a male mold and a female mold.
[0049]
Further, the flat bag sealed on three sides shown in FIG. 1A is formed of plastic, metal, paper, ceramic or a laminate thereof.
[0050]
In addition, the welded portion 2 is joined by heat and pressure using a heat seal or the like if the inside surface of the bag is a heat-sealing plastic film or a packaging material provided with a heat seal layer.
[0051]
The adhesive varies depending on the material, but if it is a paper material, it is joined by pressure using a hot melt in addition to vinyl acetate resin, polyacrylic resin, polyvinyl alcohol, or the like.
[0052]
The inner surfaces of the front surface member 10 and the back surface member 10 'shown in FIG. 1B are joined by heat and pressure by a seal bar which heats a laminate provided with a heat-sealing plastic film.
[0053]
The material composition of the laminates 10, 10 ′ used for the bag-shaped packaging container 1 is a packaging material used depending on the storage items to be stored, a storage method, a distribution method, a usage method, an amount, a size, etc. of the storage items, The material composition and the like differ.
[0054]
As one embodiment according to the present invention shown in FIG. 1 (c), the contents are filled and sealed in a bag-shaped packaging container 1 in which a front surface member 10 and a back surface member 10 'are joined by a heat and pressure seal with the same material composition. 1 shows a configuration of a heat-resistant bag-shaped packaging container 1 that is opened after being boiled.
[0055]
As shown in FIG. 1 (c), the front member 10 and the back member 10 'shown in FIG. 1 (b) have a polyester film 3 (12 .mu.) / Ink layer 4 / adhesive layer 5 / nylon 6 (15 .mu.) / Adhesive from the outside. It is composed of layer 5 / unstretched polypropylene 8 (40μ).
[0056]
In addition, the unstretched polypropylene 8 provided on the inner surface of the front surface member 10 and the inner surface of the back surface member 10 'to be formed in the bag-shaped packaging container 1 is joined by a heat and pressure seal by a heat seal bar.
[0057]
The printing performed on the back surface of the polyester film 3 is performed by gravure printing (intaglio printing) or flexographic printing, and then bonded to various types of configured films.
[0058]
After forming the laminates 10 and 10 ', one embodiment for producing the bag-shaped packaging container 1 is a two-sided seal flat bag with a two-side seal or a three-way flat with a three-side seal by a bag making machine shown in FIG. A bag-like packaging container 1 such as a bag is processed.
[0059]
In the bag making machine, a wide raw material of the laminate is fed by a feed roller, and then the raw material of the laminate is folded into two along a center line in a vertical direction in a feeding direction to be slit.
[0060]
As shown in FIG. 5, the two laminated bodies 10 and 10 ′ that have been slit are separated into an upper part 10 and a lower part 10 ′ and guided to a pair of dancer rollers 14, and the vertical seals of the respective laminated bodies 10 and 10 ′ are removed. A vertical seal bar 15 to be applied is guided to a horizontal feed path and overlaps each other. (The dancer roller 14 stores the laminates 10 and 10 'and maintains the tension.)
[0061]
A vertical seal bar 15 for applying a vertical seal is provided on the feed path of the laminates 10 and 10 ', and a horizontal seal bar 17 for providing a horizontal seal is provided downstream thereof. It is guided to the vertical seal bar 15 and the horizontal seal bar 17.
[0062]
The laminates 10 and 10 ′ are heat-pressed and sealed by the vertical seal bar 15, and a vertical seal 37 is formed on the laminates 10 and 10 ′.
[0063]
Further, the laminates 10 and 10 ′ are heat-pressed and sealed by the horizontal seal bar 17 to form a horizontal seal portion.
[0064]
Further, after each of the laminates 10 and 10 'is vertically sealed, a male mold and a female mold are formed on the horizontal seal bar 17 to form the concave / convex portion 12 for discriminating the opening notch S by the feel of the hand. FIG. 3 shows a state in which the two-sided bag making process is performed.
[0065]
After each of the laminates 10 and 10 'shown in FIG. 3 is vertically sealed, after forming an identifiable concave and convex portion 12 at the cutout portion S for opening on the horizontal seal bar 17, it is located just before the downstream feed roller in the delivery portion direction. The slit device 23 slits the central portion (b) of the vertical seal width of each of the laminates 10 and 10 ′ (b), and the horizontal portion provided at a right angle to the flow direction by the cutter unit 20 in front of the downstream feed roll. Every other center (a) where the center (a) of the seal width portion is cut by the cutter portion 20 (b), the hemispherical shape or the like of the uneven portion 12 in which the opening cutout portion S can be identified is formed in half.
[0066]
Further, a male mold and a female mold for forming the concave and convex portion 12 on the opening seal portion S provided on the horizontal seal bar 17 are separately provided in the punch device portion 24 in the downstream direction, and the opening cut portion S is provided independently. It is also possible to form a hemispherical shape or the like of the concavo-convex portion 12 that can be identified above.
[0067]
Further, in FIG. 5, a vertical seal is formed, and an intermediate feed roll 18 is provided on the horizontal seal bar 17 for transporting each of the laminates 10 and 10 '. Dancer rolls 19 are provided to stop the bodies 10, 10 'and maintain a constant tension.
[0068]
In order to stop each of the laminates 10 and 10 'at a predetermined position of the vertical seal portion 15, a sensor 16 detects a predetermined pattern of a printing portion applied to each of the laminates 10 and 10', and the intermediate feed roller 18 and the downstream feed roller 21 are operated and stopped.
[0069]
In addition, after the vertical sealing, the stacks 10 and 10 ′ are moved forward by the operation of the intermediate feed roller 18 and the downstream feed roller 21, and a predetermined pattern of the printing unit applied to each of the stacks 10 and 10 ′ is detected by the sensor 22. Is sensed, and the laminates 10 and 10 'are stopped at predetermined positions of the horizontal seal portion 17.
[0070]
The driving and stopping of the feed rollers 18 and 21 by the sensors 16 and 22 are partially controlled by the program controller 11.
[0071]
After the formation of the horizontal seal, each of the laminates 10, 10 ′ is intermittently fed by the intermediate feed roll 18 and the downstream feed roller 21, and the center of the width of each of the laminates 10, 10 ′ is slit into two by the slit device 23. Further, the stacked bodies 10, 10 'are stopped at predetermined positions by the sensors 16, 22, and at the same time, the center of the horizontal seal portion 17 is cut by the cutter 20.
[0072]
When the identifiable uneven portion 12 is provided on the opening notch S by the horizontal seal bar 17, an opening notch operation such as a linear notch or a V-shaped cut or a U-shaped cut can be provided by the punch device 24.
[0073]
When a predetermined amount of the flat three-side seal bags cut into a predetermined shape is accumulated on the conveyor 13, the conveyor 13 slightly moves and stops again until a predetermined number of the flat three-side seal bags are accumulated on the conveyor 13. By doing so, a block in which a predetermined number of flat three-side seal bags are accumulated on the conveyor 13 is formed.
[0074]
The blocks in which the predetermined number is accumulated are advanced little by little on the conveyor 13 and packed in the work table 7.
[0075]
The container body 25 of the deep drawn packaging container 26 shown in FIG. 2 is formed by drawing a single-layer or multi-layer plastic film sheet by vacuum forming, press forming, pressure forming, or the like.
[0076]
The container body 25 often has a multilayer structure including a heat sealing resin and a gas barrier resin.
[0077]
Further, the deep drawn packaging container 26 according to the present invention shown in FIG. 2 includes a container body 25 and a lid member 30 in consideration of easy-peeling, and a flange portion of the container body 25 has a peelable heat-sealing resin layer of the lid member 30. And heat sealed.
[0078]
At least the inner surface of the container body 25 is made of a resin having heat sealing properties, and is made of low-density polyethylene, medium-density polyethylene, high-density polyethylene, isotactic polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer Polyethylene terephthalate resins having a relatively low melting point or low softening point, such as olefin resins graft-modified with ethylenically unsaturated carboxylic acids or anhydrides thereof, can be used.
[0079]
The container body 25 preferably has a multilayer structure including an inner surface layer (heat-sealing resin layer) 27 and an intermediate layer (gas barrier resin layer) 28.
[0080]
Further, as an example, as shown in FIG. 2C, the inner surface layer (heat-sealable resin layer) 27 of the container body 25 has a heat-sealing property and moisture resistance, and is made of polyethylene, polypropylene, ethylene- A polyolefin such as a propylene copolymer or a thermoplastic resin such as polyethylene terephthalate or polybutylene terephthalate is used together with the outer surface layer 29.
[0081]
The gas-barrier thermoplastic resin provided in the intermediate layer (gas-barrier resin layer) 28 between the inner surface layer (heat-sealable resin layer) 27 and the outer surface layer 29 includes ethylene vinyl alcohol copolymer and vinylidene chloride. Resin, hynitrile resin, nylon resin and the like are used.
[0082]
The inner and outer surface layers (heat-sealable resin layers) 27 and 29 and the intermediate layer (gas barrier resin layer) 28 are joined via adhesive layers 31 and 32 made of an adhesive resin having thermal adhesiveness. .
[0083]
As the resin having a thermal adhesive property for the adhesive layers 31 and 32, for example, an acid-modified olefin resin, a copolyester-based adhesive resin, or an epoxy-modified thermoplastic adhesive resin is used.
[0084]
As shown in FIG. 2C, the lid member 30 is composed of an outer surface protective resin coating layer 33, a gas barrier resin layer 35, and a heat sealing inner surface material layer 36, and each layer is formed via an adhesive layer 34. ing.
[0085]
The heat sealing inner surface material layer 36 is composed of a resin support layer 37 and a peelable heat seal resin layer 38. The resin support layer 37 is made of a resin having a large cohesive force. It is firmly supported so as not to peel off.
[0086]
The resin support layer 37 is preferably made of a resin having the same main repeating unit as the inner surface layer (heat-sealable resin layer) 27 on the upper surface of the flange portion of the container body 25. As a preferable heat-seal resin, isotactic polypropylene or crystalline resin is used. It is an olefin resin such as a polypropylene-based polymer such as a propylene-ethylene block copolymer, a low-density polyethylene, a medium-density polyethylene, or a high-density polyethylene. If heat resistance or the like is required, a polypropylene-based resin is used.
[0087]
As the peelable heat seal resin 38, a heat seal resin having reduced cohesive strength or heat seal strength is used, and a resin composition comprising a blend of two or more heat seal resins having different main repeating units is used. .
[0088]
Further, the peelable heat seal resin layer 38 is preferably made of a composition of a polypropylene resin and a polyethylene resin. When the resin support layer is made of a polypropylene resin, the peelable heat seal resin layer 38 is mainly made of a polypropylene resin. It is preferable to use a resin composition containing a small amount of resin.
[0089]
The flange portion of the container body 25 and the lid member 30 shown in FIG. 2B can be joined by an ultrasonic seal, a dielectric heating seal, a heat seal, or the like, but a liquid surface seal (the liquids as contents are in the seal portion). In the case of sealing by applying a seal in a state, it may be called a liquid bite seal), the joining by the heat sealing method is not preferable.
[0090]
Further, a reliable heat seal is desirably provided between the flange portion of the container main body 25 shown in FIG. 2B and the lid member 30, and the heat seal temperature is 180 to 240 ° C.
[0091]
The whole surface of the joining of the flange portion of the container body 25 and the lid member 30 by the heat sealing method is performed except for the opening portion.
[0092]
As shown in FIG. 2 (b), the flange portion of the container body 25 and the lid member 30 are entirely solid-sealed except for the opening portion 39, and at the same time, a hemispherical opening or the like The concave / convex portion 12 is formed so that the cut portion S can be identified by the feel of the fingertip.
[0093]
The uneven portion 12 having a hemispherical shape or the like forms the uneven portion 12 by pressurization or heating and pressurization by a male mold and a female mold, or heats the outer surface layer portion of the flange portion of the container body 25 serving as the opening portion 39 with hot air. The uneven portion 12 having a hemispherical shape or the like can also be formed by press forming or vacuum forming.
[0094]
In addition, the uneven portion 12 of the opening portion 39 may be formed in advance at a location to be the opening portion 39 of the flange portion of the container body 25 before the lid member 30 is sealed by welding.
[0095]
As described above, the uneven portion 12 having a hemispherical shape or the like is formed substantially at the center of the flange portion of the packaging container such as the deep drawing package or the skin pack or the opening 39 formed on the outer peripheral edge of the storage item 40. However, the notch S for opening can be easily identified.
[0096]
【The invention's effect】
The present invention is an easily identifiable packaging container with a notch S for opening having the above-mentioned configuration, which is only elderly for forming an uneven portion that can be identified by touching it with a fingertip on a seal, In addition to being able to easily identify the notch for opening even in a blind place or in a dark place, the male and female mold surfaces of the concave and convex portions formed on the notch for opening can be easily welded to the welded part. Since the color changes, the healthy person can quickly and sufficiently identify the opening cutout visually. The present invention is indispensable as the population ages more and more in the future. Further, since the uneven portion is formed on the peripheral portion of the opening cutout portion, the uneven portion is reheated and pressurized, so that the packaging container can be easily opened without troublesome opening.
[Brief description of the drawings]
FIG. 1 (a) is a front view showing a packaging container according to the present invention in which an opening notch is provided with irregularities for identification, and FIG. 1 (b) is a cross-sectional view showing a cross section taken along the line AA ′ of FIG. 1 (a). (C) is a cross-sectional view showing a BB ′ cross section of FIG. 1 (a), (d) is an explanatory view showing the formation of the identification unevenness on the V-shaped cut portion of the opening cutout S, ( (e) is an explanatory diagram showing the shape of the identification unevenness on the U-shaped cut portion of the opening cutout portion, and (f) shows the shape of the identification unevenness on the spear-shaped cut portion of the opening cutout portion. FIG.
FIG. 2 (a) is a plan view showing a plane of a deep-drawing packaging container having an easily identifiable notch S for opening according to the present invention, and FIG. 2 (b) is a cross-sectional view showing a cross section taken along the line CC 'of FIG. FIG. 2C is a cross-sectional view showing an enlarged cross section of the cross section of the flange seal portion M in FIG.
FIG. 3 is an explanatory view showing a state in which a bag-shaped packaging container having a cut-away portion for opening according to the present invention is manufactured.
4 (a) is a front view showing a bag-shaped packaging container with a cut-out portion for opening formed in a conventional bag-shaped packaging container, and FIG. 4 (b) is a view showing a notch in an S portion of FIG. 4 (a). FIG. 4C is an explanatory view showing a V-shaped cut formed in a changing opening notch, and FIG. 4C shows a U-shaped cut formed in the opening notch which changes into a notch of an S portion in FIG. FIG. 4D is an explanatory view showing a spear-shaped cut formed in the opening cutout portion which is replaced with the notch of the S portion in FIG.
FIG. 5 is a front view showing the front of a machine for producing a packaging container with a notch for easy opening according to the present invention.
[Explanation of symbols]
1 ... bag-shaped packaging container
2 ... Welding part
3. Polyester film
4: Ink layer
5 ... adhesive layer
6 ... Nylon
7 ... Work table
8. Unstretched polypropylene
9: Unsealed part
10. Surface wrapping material
10 '… Backside packaging material
11 Program control device
12: Uneven part
13 ... Conveyor
14 ... Dancer roller
15 Vertical seal bar
16 ... Sensor
17 ... horizontal seal bar
18. Intermediate feed roller
19 ... Dancer roller
20 ... Cutter
21 Downstream feed roller
22 ... Sensor
23 ... Slit device
24 ... Punch device
25 ... container body
26… Deep drawn packaging container
27 ... Inner surface layer
28 ... Intermediate layer
29 ... Outer surface layer
30 ... lid
31 ... Adhesive layer
32 ... Adhesive layer
33: outer protective resin coating layer
34 ... Adhesive layer
35 ... gas barrier resin layer
36 ... Inner surface material layer
37 ... Resin support layer
38: Peelable heat seal
39 ... Opening section
40 ... Stowage

Claims (3)

A packaging container having an opening notch for putting confectionery, processed food, cooked food, processed meat, medical product, and the like, wherein an uneven portion surrounding an outer peripheral edge of the opening notch of the packaging container is formed. A packaging container with an easy-to-open notch for cutting. 2. The easily identifiable opening according to claim 1, wherein the packaging container is a sealed bag having a welding portion, wherein the welding portion has an uneven portion surrounding the outer peripheral edge of the opening cutout portion. Packaging container with a cut-out part. The packaging container is a molded hermetically sealed packaging container having a welded portion, wherein the opening for opening is an unbonded portion or an uneven portion is formed substantially at the center of the weakly bonded portion, so that it is easy to identify. Packaging container with a notch for opening.

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