Container opening, and a packaging container having the same

Abstract

To obtain a container opening part which can be clearly determined whether it has been opened even if the distance to a breakable area is small.SOLUTION: In a container opening part(1) which has a container opening film part (2) which consists of a base film (20) having a base layer (201) made of a stretched film and a sealant layer (202) and has a tongue-like notch (211), and an opening label (3) capable of opening and closing the opening part, starting from a gripping part (31) of the opening label, the opening label can be peeled off from the base film to the vicinity of the other end, and the opening label has an unopened part and an unopened revealing part (34) for discerning the opening, and between the unopened part and unopened revealing part there are a perforated cut (32) inclined from the opening direction and capable of being opened, a shielding layer (304) outside the base material layer in a peripheral region of the perforated cut, and an adhesion prevention layer (303) inside the adhesive layer in the peripheral region of the perforated cut.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a container opening having a reclosable opening on at least one side.

Background Art

[0002] There has been proposed a lid material for a packaging container that stores contents and has an opening that can be opened and closed. For example, in Patent Document 1, a lid material that covers the outlet of a packaging material having an outlet for taking out an article and can be peelably and reattachably attached to the packaging material and peeled from one end to the other end, having a lid base material provided with a gripping portion at one end, a sealing portion integrally extending from the lid base material, and an adhesive layer provided on the back surfaces of the lid base material and the sealing portion, the lid base material has an inclined edge that is continuous with the edge of the gripping portion and is inclined with respect to the peeling direction of the lid material, and the sealing portion extends from a part of the inclined edge of the lid base material, a breakable region having at least two cut portions is interposed between the lid base material and the sealing portion, the first cut portion forms an acute angle with respect to a virtual inclined line corresponding to a part of the virtual inclined edge that would be assumed if the sealing portion did not extend from the lid base material as it extends in the peeling direction of the lid material and extends obliquely outward, the second cut portion extends obliquely inward as it extends in the direction opposite to the peeling direction of the lid material from the other base portion of the sealing portion. This is the lid material.

[0003] This lid material has a problem that the distance of the breakable region between the tip of the opening start cut and the next cut portion where the extension does not exist is small, and the external difference after breaking is not easily noticeable, and it is difficult to clearly determine whether it has been opened or not.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

SUMMARY OF THE INVENTION

PROBLEM TO BE SOLVED BY THE INVENTION

[0005] Therefore, an object of the present invention is to obtain a container opening through which the presence or absence of opening can be clearly determined visually even when the distance of the easily breakable region is small.

MEANS FOR SOLVING THE PROBLEM

[0006] The container opening of the present invention comprises a base film having at least a base material layer made of a stretched film and a sealant layer, a container opening film portion having a tongue-shaped cut line as a film opening on one side, and an opening label capable of repeatedly opening and closing the film opening of the container opening film portion In the container opening having starting from a gripping portion whose adhesiveness is suppressed by an adhesion suppressing layer at one end of the opening label, the opening label from the base film to the vicinity of the other end can be peeled off to open, wherein the opening label has an opening portion to be opened, an unopened display portion that remains partially on the base film side when opened and enables the determination of the presence or absence of opening, and has a perforation formed of a perforation that is inclined with respect to the opening direction and can be easily opened between the opening portion and the unopened display portion, a shielding layer outside the base material layer in the peripheral region of the perforation, and an adhesion suppressing layer inside the adhesive layer in the peripheral region of the perforation. The container opening is characterized by having these.

EFFECTS OF THE INVENTION

[0007] When the container opening of the present invention is opened, not only can it be determined that the unopened display portion remains and has peeled off, but also the opening label has a shielding layer that overlaps the perforation and covers its peripheral region. When opened, the hidden perforation appears, and it can be clearly determined from a distance that it has been opened.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying out the Invention

[0009] Hereinafter, embodiments of the container opening of the present invention will be described in detail with reference to the drawings. Figure 1-1 is a view of the container opening 1 of the present invention. The container opening 1 has a configuration in which an opening label 3 is pasted so as to cover the periphery of the opening 21 of the container opening film part 2. At one end of the opening label 3, a non-adhered grip part 31 protrudes and is provided, and cut parts 32 inclined from near both ends of the grip part 31 are provided.

[0010] Figure 1-2 is a cross-sectional view taken along line A-A across the cut part 32 of the container opening 1 of the present invention, and Figure 1-3 is a cross-sectional view taken along line B-B across the grip part 31. The container opening film part 2 is composed of a base film 20 having at least a base material layer 201 made of a stretched film and a sealant layer 202. Of course, a barrier layer, a printing layer, etc. may be provided between the base material layer 201 and the sealant layer 202, or on the outside of the base material layer 201. In the above base film 20, a film opening 21 formed by a tongue-shaped cut line 211 is disposed at the center. This cut line 211 is formed by a cut line that penetrates the entire base film from the base material layer 201 side.

[0011] The opening label 3 is composed of at least a label base material layer 301 and an adhesive layer 302. Furthermore, on the entire surface of the gripping portion 31 of the opening label 3, a tackiness suppressing layer 303 is provided on the inner surface side of the adhesive layer to suppress tackiness. Also, the opening label 3 has an inclined cut portion 32. On the tip gripping portion side, it becomes an unopened display portion 34, and on the base side of the opening label 3, it becomes an opening portion 35. The opening portion 35 adheres to the film opening 21 of the base film and the periphery of the film opening on the outside thereof. And this cut portion 32 is formed by a cut that penetrates the entire label from the base material layer 301 side.

[0012] Figure 2 is a diagram of the container opening film portion 2 used for the container opening 1 of the present invention, the opening label, the film structure diagram near the cut portion, and partial enlarged views thereof. Figure 2-1 is the container opening film portion 2. In the container opening film portion 2, a film opening 21 is formed by a tongue-shaped cut line 211 at the center. It is formed. The tongue-shaped root portion without the cut line forming the film opening 21 is fastened to the periphery of the container opening film portion 2. And at the cut line end 212 at the root of the film opening 21 that is fastened as described above, the both ends of the cut line are directed in a direction away from the opening direction by a curve. For this reason, even if the film opening 21 is opened with a strong force and an unreasonable force is applied to the root, it is difficult for the film opening 21 to break.

[0013] Figure 2-2 is the opening label 3. The opening label 3 is a label that can repeatedly open and close the film opening 21. Further, the opening label 3 adheres to the entire surface of the film opening 21 and its periphery, and has an opening portion 35 that enables the opening and closing of the container, and an unopened display portion 34 that is partially adhered to the base film side near one end and can be used to determine the presence or absence of peeling. There is a cut portion 32 inclined with respect to the opening direction between the opening portion 35 and the unopened display portion 34, separating the two.

[0014] The inclined cut portion 32 includes an inclined perforation-shaped cut 321 and a connecting portion 323 between the perforation-shaped cuts 321, where a tear can propagate from the cut end portion on the gripping portion 31 side to the next cut in the opening direction, enabling tearing. and consists of The cut portion 32 is a half-cut made by cutting from the adhesive layer 302 side. In the embodiment shown in Fig. 2-2, it includes an inclined perforation-shaped inclined cut 321 and a guiding portion 322 consisting of cuts that start from one end of each of the perforation-shaped inclined cuts 321 and incline toward the gripping portion 31 side. The cut portion 32 is composed of an inclined cut portion having the guiding portion 322, which is formed by a plurality of weakened lines arranged in a perforation shape with half-cuts from the adhesive layer 302 side along a line inclined with respect to the opening direction, with the guiding portion 322 facing the gripping portion 31 side.

[0015] Fig. 2-3 is a film structure diagram near the cut portion 32 in the opening label 3. (a) shows the basic configuration of the opening label 3, which is composed of a label base material layer 301 and an adhesive layer 302 inside it. And in the entire cut portion peripheral region of the inclined cut 321 and the guiding portion 322 of the inclined cut portion 32, there is a shielding layer 304 outside the label base material layer 301 in the cut portion peripheral region, and an adhesion suppression layer 303 inside the adhesive layer 302 in the cut portion peripheral region.

[0016] (b) is an exemplary embodiment of a configuration in which a barrier stretch base material layer 306 is provided via an adhesive layer 305 on the configuration of the basic opening label 3. The barrier stretch base material layer 306 is a configuration in which a film obtained by applying a barrier layer such as vinylidene coating, metal oxide, or metal vapor deposition to a biaxially stretched film is laminated. The barrier stretch base material layer 306 can protect the shielding layer from being rubbed, deteriorated, or peeled off.

[0017] In these opening labels 3, the cut portion 32 has a half-cut from the adhesive layer 302 side toward the knob portion 31 through the guiding portion 322, and the cut does not reach the shielding layer 304. Therefore, when the opening label 2 is unopened, the shape of the cut cannot be visually recognized at all in the peripheral region of the cut portion covered with the shielding layer 304 in terms of appearance.

[0018] FIG. 3 shows the container opening 1 of the present invention. FIG. 3-1 is a plan view before opening, FIG. 3-2 is a plan view showing the opening process, and FIG. 3-3 is a longitudinal sectional view of the opening process and a partial enlarged view thereof. First, to open the package, hold the knob portion 31 and pull the opening label 3 away from the container opening film 2 starting from the knob portion 31 to open it. As shown in FIG. 1-3, the knob portion 31 is provided with an adhesive inhibition layer 303 on the inner surface, so it can be easily peeled off from the container opening film portion 2 and held. When the opening label 3 is lifted, the opening portion film 210 portion that becomes the film opening portion 21 is lifted while adhering to the opening label 3, and only the outer peripheral edge of the opening portion film 210 of the container opening film portion 3 is peeled off from the opening label 3 and opened. When opening, the cut portions 32 inclined with respect to the opening direction are torn and broken from both ends of the knob portion 31.

[0019] When opening, the cut portions 32 inclined with respect to the opening direction are torn and broken from both ends of the knob portion 31. In the unopened display portions 34 on both sides of the knob portion 31, they are strongly adhered to the container opening film portion 2. Also, the film (opening portion film 210) of the film opening portion 21 is adhered to the opening label 3, and the outer peripheral edge of the film opening portion 21 is also adhered to the above-mentioned opening label. When opening, when lifting the knob portion 31 of the opening label 3, a crack 37 runs in the opening direction from the tip of the root cut portion 36 at the time of the knob portion 31 shown in FIG. 2-2 and reaches the first guiding portion 322. The above-mentioned root cut portion 36 is a full-through cut that penetrates the entire thickness of the layer of the opening label 3. For this reason, the cut portion 32 becomes a cut that can be easily torn and the start of breakage is possible. Since it is configured in this way, with the force of turning up and opening the opening label, the opening progresses from the first guiding portion 322 to the inclined cut 321. When the opening reaches the cut end portion 3211, at the connecting portion 323 between the inclined cut 321 and the next inclined cut 321, a crack 37 progresses in the opening direction from the cut end portion 3211, the crack progresses to the next guiding portion 322, and successively along the perforated cuts, the connecting portion 323 is torn and opened.

[0020] In particular, an adhesion suppression layer 303 for suppressing the adhesive force between the opening label 3 and the container opening film portion 2 at the peripheral edge of the film opening portion 21 is provided so as to cover the entire region of the inclined cut portion and the guiding portion of the cut portion 32. Therefore, in the tearing direction, no displacement due to adhesion occurs. For this reason, the breakage progresses smoothly in the opening direction without displacement in the direction of being broken and torn, and there is no risk of being torn in an unexpected direction. If it is torn halfway, it becomes impossible to open widely and also impossible to reseal. However, since it can be stably broken at the cut portion 32, it can be opened and closed without problems.

[0021] In this way, for the opened container opening portion 1, to reseal, simply return the turned-up opening label 3 to its original position, and the opening portion is resealed. When resealing, although the vicinity of the cut portion 32 that has once been torn will have the unopened display portion 34 and the opening portion 35 joined together, due to being torn, they will not completely overlap. Therefore, when unopened, in the peripheral region of the cut portion covered by the shielding layer 304, the shape of the cut was not visually recognizable at all in terms of appearance, but the clearly torn fracture line of the cut portion became visually recognizable.

[0022] Figure 4 shows an application example when the container opening of the present invention is used as one side to form a container. Figure 4-1 is an example of using the container opening of the present invention at the center of the front side of a pillow-type packaging bag. When used for packaging bag containers such as wet tissue, even when opening and closing are repeated, it can be easily opened and sealed freely. Also, since it can be immediately visually confirmed whether the unopened display portion is connected to the opening portion, it is optimal for ensuring safety and security.

[0023] Figure 4-2 shows an application example when the container opening of the present invention is a container fused to the opening surface of an injection cup or a cup-shaped opening surface formed by vacuum forming or pressure-air forming. When fused to the opening of the cup-shaped container, a firm opening surface can be formed, so it is easy to open. Also, when sealing, since the opening surface is a fixed plane, it can be used as an easy-to-handle container.

[0024] As the base material layer of the opening label used in the present invention, it is particularly good to use a biaxially stretched film. The biaxially stretched film is thin and highly flexible, and is also likely to become flat, so problems such as wrinkling during opening and closing and the generation of gaps between the container opening film portion are less likely to occur. Specifically, biaxially stretched polyethylene terephthalate film, biaxially stretched polyamide film, biaxially stretched polypropylene film, etc. can be used.

[0025] In the aperture label used in the present invention, as the biaxially stretched base material layer used in the configuration provided with a barrier-like stretched base material layer, as the biaxially stretched film, a biaxially stretched polyethylene terephthalate film, a biaxially stretched polyamide film, a biaxially stretched polypropylene film, etc. are used, and a barrier-like biaxially stretched film obtained by coating polyvinylidene resin thereon, depositing metal oxides such as silicon oxide, aluminum oxide, titanium oxide, or depositing metals such as aluminum, chromium, zinc, etc. can be used. However, the thickness of the barrier-like biaxially stretched film is preferably 20 μm or less so that it can be torn intermittently. As the shielding printing layer, flaky fine powders having an ultraviolet shielding function obtained by carrying an inorganic compound such as titanium oxide on the surface of a flaky substrate such as mica, or shielding inks obtained by finely breaking a highly concealing metal foil and pigmenting it can be used.

[0026] As the base material layer of the base film used in the container opening film portion of the present invention, a biaxially stretched polyethylene terephthalate film, a biaxially stretched polypropylene film, a biaxially stretched polyamide film, paper, etc. can be used. Further, films obtained by depositing metal oxides such as silicon oxide thereon, or barrier-like films obtained by depositing metals such as aluminum can also be used. Further, a heat-sealable biaxially stretched polypropylene film, an antistatic unstretched polypropylene film, etc. can be used, and a package having rigidity by fusing the ends of gussets and machi may be used.

[0027] As the sealant layer used in the container opening film portion of the present invention, low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, unstretched polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-methacrylic acid copolymer, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, etc. can be used.

[0028] As a prototype example, the following container openings were created and evaluated. <Prototype Example> As the material for the opening label, a biaxially oriented polypropylene film (thickness 20 μm) coated with polyvinylidene was used as the base material. As the adhesive layer of the re-peelable tack label, a label (thickness 100 - 110 μm) obtained by coating an acrylic adhesive on a biaxially oriented polypropylene film was used. As the shielding printing layer, a shielding ink obtained by finely breaking a highly concealing metal foil and pigmenting it was used. It was locally applied by a printing machine to the cut-out area on the front side of the re-peelable tack label. As the adhesion inhibition layer, an ultraviolet-curable release varnish was used. The base material layer and the re-peelable tack label were bonded together using an ultraviolet adhesive with a UV (ultraviolet) laminator. Using the above, as the opening label, a film web of vinylidene resin-coated biaxially oriented polypropylene film / ultraviolet adhesive / re-peelable tack label was created from the outside. Using this web, an adhesion inhibition layer 303 was printed in a pattern on the adhesion inhibition parts of the gripping part 31 and the cut-out part 32 with an ultraviolet-curable release overprint varnish, and the cuts and outer shapes were pressed and punched out to create an opening label 3 with the shape shown in Fig. 2-2.

[0029] As the material for the container opening film part, a polyethylene terephthalate film (thickness 12 μm) was used as the base material. As the sealant film, a multilayer co-extruded film with a thickness of 60 μm having a composition of 6-nylon / saponified ethylene vinyl acetate copolymer / ethylene-propylene copolymer with an anti-fogging agent was used. The base material and the sealant film were bonded together using a urethane-based adhesive for dry lamination. Using the above, as the container opening film part, a base film with a structure of biaxially oriented polyethylene terephthalate / adhesive / multilayer barrier anti-fog sealant was created from the outside. Using this raw material, the cut line of the film opening was pressed to create a container opening film portion having the shape shown in Fig. 2-1. The above opening label was adhered so as to cover the opening of the container opening film portion.

[0030] <Evaluation method> As an unopened display function evaluation test method, the following evaluation test was conducted. Using Prototype Example 1, as shown in Figs. 3-2 and 3-3, starting from the gripping portion 31 of the opening label 3, the cut line opening label 3 was peeled off from the container opening film by 180 degrees in the direction of the hinge side where the film opening 21 was connected to the periphery of the container opening film. For the evaluation of the unopened display function, at the cut portion between the unopened display portion and the opened portion, without cutting in an unexpected direction, the crack at the connecting portion was correctly and continuously connected to the guiding portion leading from the end of the cut to the next cut and then to the inclined cut portion, and both ends of the opening label were torn between the unopened display portion and the opened portion, and the unopened display portion remained on the container opening film side, which was marked as ○. At the cut portion between the unopened display portion and the opened portion, the crack did not connect from the end of the previous cut to the next guiding portion and the inclined cut portion, but ran in an unexpected direction, and a part of the opened portion remained on the container opening film portion, or the unopened display portion also came off from the container opening film portion during opening, which was marked as ×.

[0031] <Evaluation results> Regarding the evaluation results of the unopened display function, all 10 samples evaluated remained unopened after opening, and the result was ○. Also, even after reclosing, the cut portion clearly protruded and the opened

[0032] From the above results, although the cut portion could not be visually recognized at all when unopened, after opening, the torn cut portion could be clearly visually recognized, and it was ensured that the opening had occurred.

[0033] When the container opening of the present invention is first opened, not only can it be determined that the shielding part has been peeled off by the divided shielding part, but also the opening label has a shielding layer that overlaps the cut part and covers its peripheral area. When opened, the hidden cut part appears, and it can be clearly judged from a distance that it has been opened. Moreover, the inner surface of the opening label is an adhesive layer, and it is an openable and closable container opening that can be easily closed again even after being opened. And since the container opening of the present invention has a configuration that is easy to mass-produce on a general production line, it can be manufactured inexpensively in large quantities. Furthermore, the advantages of the present invention are great, such as being easily applicable to general packaging bags such as bellows containers, or being easily applied to the opening of a cup by sticking it to the opening of the container.

Explanation of Signs

[0034] 1 ······· Container opening 2 ······· Container opening film 20 ······ Base film 201 ······ Substrate layer (container opening film substrate layer) 202 ······ Sealant layer 21 ······ Film opening 210 ······ Opening film 211 ······ Cutting line (tongue-shaped cutting line) 212 ······ End of cutting line 3 ······· Opening label 301 ······ Label substrate layer 302 ······ Adhesive layer 303 ······ Adhesion inhibition layer 304 ······ Shielding layer 305 ······ Adhesive layer 306 ······ Barrier stretch substrate layer 31 ······ Gripping part 32 ······ Cut part 321 ······ Inclined cutting line 3211 ····· Cutting end 322 ······ Induction part 323 ······ Connecting part 34 ······ Unopened display part 35 ······ Opening part 36 ······ Bottom cut part 37 ······ Crack

Claims

1. It consists of a base film having at least a substrate layer made of a stretched film and a sealant layer, and a container opening film part having a tongue-shaped cut line as a film opening on the base film, an opening label capable of repeatedly opening and closing the film opening of the container opening film part, In the container opening having, Starting from the gripping part whose adhesiveness is suppressed by the adhesion suppression layer at one end of the opening label, the opening label from the base film to the vicinity of the other end can be peeled off and opened, The opening label is, An opening part to be opened, An unopened display part that remains partially on the base film side when opened and enables discrimination of the presence or absence of opening, Having, Between the opening part and the unopened display part, there is a cut part consisting of a half-cut perforation inclined in the opening direction and easily openable, a shielding layer outside the label substrate layer in the peripheral region of the cut part, and an adhesion suppression layer inside the adhesive layer in the peripheral region of the cut part. The container opening is characterized by having these.

2. The inclined cut part separating the opening part and the unopened display part is, An inclined perforation-shaped cut, Between the perforation-shaped cuts, a connecting part where a tear propagates in the opening direction from the cut end on the gripping part side to the next cut and can be torn, Consisting of, The container opening according to claim 1, wherein the cut is a half-cut cut made from the adhesive layer side.

3. At the base of the gripping part of the opening label, a cut is made that penetrates the base cut part in the opening direction toward the center of the first guiding part. The container opening according to claim 1 or 2 is characterized by this.

4. The film opening of the container opening film part has a root in a direction where both ends of the cut line are removed from the opening direction by a curve. The container opening according to any one of claims 1 to 3 is characterized by this.

5. A packaging container characterized by having the container opening according to any one of claims 1 to 4.

Images