JP6347904B1 - Sheet nozzle cap - Google Patents

Abstract

[Problem] To propose a sheet-like nozzle cap suitable for a container filled with contents whose solidification and quality deterioration cannot be avoided due to contact with air or moisture. In a sheet-like nozzle cap that is detachably attached to a nozzle N and hermetically holds a spout N1 of the nozzle N, the cap is inserted into a bag-like insert that is attached to at least a tip portion of the nozzle N through an opening. It has a portion 1a, and the entire inner wall surface of the insertion portion 1a is composed of two-layer laminate films 1a and 1b that can be in close contact with the outer peripheral wall of the nozzle N. [Selection] Figure 1

Description

  In the present invention, solidification or quality deterioration is unavoidable due to contact with air or moisture. For example, a container filled with a sealing material, adhesive, food, medicine, etc. as a content (liquid, viscous) is poured. The present invention relates to a sheet-like nozzle cap that is suitable for being attached to a discharge nozzle.

  Containers filled with sealing materials or adhesives (instant adhesives, etc.) as the contents are usually poured out through the nozzle provided at the tip of the container, and the use of the contents is finished. After that, a cap is attached to the tip of the dispensing nozzle and stored.

  By the way, this type of conventional cap is made of a hard material that is shaped to fit the dispensing nozzle, so the nozzle outlet cannot be said to be sufficiently sealed. However, even if a cap is attached, the contents remaining in the container cannot be solidified and the quality deteriorates.

  As a prior art regarding this point, for example, in Patent Document 1, a lid with a cut is provided on the circumferential surface of the opening of the cap body, and the cap is placed on the tip of the nozzle from the lid with the cut, There has been proposed a nozzle cap having a structure in which the contents in a container are filled and the air in the cap is discharged.

Japanese Patent Laid-Open No. 11-287038

  However, since the cap of Patent Document 1 is simply inserted through the slit formed in the lid, the cap mounting posture is unstable, and the cap is filled with contents. For this reason, useless contents cannot be avoided.

  The subject of this invention exists in the place which proposes the sheet-like nozzle cap which can seal the spout of a nozzle reliably based on the stable mounting | wearing attitude | position.

The present invention is a cap that is detachably attached to a nozzle and that hermetically holds a spout of the nozzle, and the cap has a bag-like insertion portion that is attached to at least a tip portion of the nozzle through an opening, the entire inner wall surface of the insertion portion is Ri Do a laminate film of two-ply-adherable to the outer peripheral wall of the nozzle, with the laminate film of the two-ply forms an inner bonding line partitioning the inserting portion and the opening, The laminated film has a joint part for joining each other, and the inner joint line protrudes at least at one of the opening, a region near the opening, and the insertion part, and can be crimped to the outer peripheral wall of the nozzle. a sheet-like nozzle cap according to claim Rukoto to have a two or more bulging portions. Here, the laminate film of two-ply, in addition to those that are configured by superposing two sheets of laminate films separated from each other, is intended to include the superposition by folding one sheet of the laminate film at any point .

  In the sheet-like nozzle cap having the above-described configuration, the two-ply laminate film preferably has an ear portion that can be used as a knob at the edge portion.

Further, on the facing wall surfaces of the bulging out part locally each other in close contact with inner surfaces of the laminate film, is formed by bonding, it has a raised portion that can be crimped to the outer peripheral wall of the nozzle, also the inner joining line A slant or radius (R) that expands the open dimension of the insert towards the opening, and the two-ply laminate film is a plastic comprising a deposited layer of Al foil or Al, Al ₂ O ₃ or SiO ₂ The laminated body of the films is constructed by superimposing each other. Further, the laminated film of the two-layered laminate has a thickness of 50 to 120 μm, and the inner wall of the insertion portion is a polyolefin-based film. It consists of a layer of thermoplastic resin or fluororesin, and a two-ply laminate film is laminated from one edge to the other. Having at least one pull shredded scheduled lines forming a through hole leading to the insertion section by a laminate film torn off, but preferably as a specific solution. In addition, a junction part can be formed by heat sealing.

  According to the present invention, the sheet-like nozzle cap is formed into a two-layer laminate film having a bag-like insertion portion that is attached to the tip of the nozzle through the opening, and the entire inner wall surface can be in close contact with the outer peripheral wall of the nozzle. Therefore, the nozzle spout can be reliably sealed under a stable mounting posture.

  Further, according to the present invention, by providing an ear portion used as a knob for gripping the sheet-like nozzle cap at the edge of the two-ply laminate film, the sheet-like nozzle cap can be easily attached to and detached from the nozzle.

  In addition, according to the present invention, the inner bonding line that partitions the insertion portion and the opening is formed, and the bonding portion in which the laminate films are bonded to each other is provided. A sheet-like nozzle cap can be manufactured only by this.

  Providing one or two or more bulging portions that protrude at least at one of the opening, the vicinity of the opening, and the insertion portion and can be crimped to the outer peripheral wall of the nozzle on the inner bonding line of the bonding portion. The force due to the springback that occurs when the part is crimped (force to return to the original shape) acts as a tightening force to tighten the nozzle body, so the sheet-like nozzle cap is easily removed from the nozzle. There is nothing to do. In the facing position of the bulging portion, the inner surface of the laminate film can be locally adhered and bonded to each other, and a raised portion that can be crimped to the outer peripheral wall of the nozzle can be provided. The tightening force for tightening the body of the nozzle is further increased, and the adhesiveness of the sheet-like nozzle cap to the nozzle is improved, so that reliable sealing can be performed. Further, by providing the inner joint line with an inclination or a radius (R) that increases the opening dimension of the insertion portion toward the opening, the opening can be easily opened, and the mounting of the sheet-like nozzle cap on the nozzle is facilitated.

  Furthermore, according to the present invention, by using a laminate film that prevents permeation of air (oxygen) and moisture, solidification of the contents in the container and deterioration of quality can be avoided.

  By making the inner wall of the insertion portion into a polyolefin-based thermoplastic resin or fluorine-based resin layer, even if the contents in the container come into contact with the inner wall surface of the sheet-like nozzle cap, chemical changes are unlikely to occur. Even if the content solidifies on the inner wall surface, it can be easily removed.

  Furthermore, according to the present invention, since the laminate films are joined by heat sealing, the sheet-like nozzle cap can be efficiently manufactured.

  By pulling two layers of laminated film along the planned cutting line and forming a through hole connected to the insertion portion, the contents can be poured out with the sheet-like nozzle cap attached. In this case, a small amount of the contents can be poured out by setting the opening area of the through hole smaller than the opening area of the nozzle outlet.

It is the figure which showed the example of the sheet-like nozzle cap suitable for this invention typically, (a) is a top view, (b) is a front view, (c) is a side view, (d) is a back surface. FIG. (A) is the external appearance perspective view which showed the state just before mounting | wearing a nozzle with the sheet-like nozzle cap shown to Fig.1 (a)-(d), (b) is the sheet-like shape shown in FIG. It is the external appearance perspective view which showed the state which mounted | wore the nozzle cap with the nozzle cap. It is the figure which showed the other example of the sheet-like nozzle cap suitable for this invention about the side surface. It is the figure which showed the other example of the sheet-like nozzle cap suitable for this invention about the side surface. It is the figure which showed the other example of the sheet-like nozzle cap suitable for this invention about the side surface. It is the figure which showed the other example of the sheet-like nozzle cap suitable for this invention about the side surface. It is the figure which showed the further another example of the sheet-like nozzle cap suitable for this invention about the side surface. It is the external appearance perspective view which showed the use condition of the sheet-like nozzle cap shown in FIG. It is the figure which showed embodiment of the sheet-like nozzle cap according to this invention about the side surface. It is the figure which showed the use condition of the sheet-like nozzle cap according to this invention about the principal part. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention about the side surface. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention about the side surface. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention about the side surface. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention about the side surface. (A)-(c) is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention about the principal part. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention. (A)-(d) is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention. It is an external appearance perspective view of the sheet-like nozzle cap shown to Fig.17 (a)-(d). It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention. It is the figure which showed other embodiment of the sheet-like nozzle cap according to this invention.

Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIGS. 1A to 1D are diagrams schematically showing examples of sheet-like nozzle caps suitable for the present invention, and FIGS. 2A and 2B are FIGS. It is the figure which showed the state just before mounting | wearing with the extraction nozzle of the container filled with the content of the sheet-like nozzle cap shown to), and after mounting | wearing, respectively.

  Reference numeral 1 in the drawing denotes a sheet-like nozzle cap attached to the tip portion of the nozzle N. The sheet-like nozzle cap 1 has a bag-like insertion portion 1a, and is manufactured by superimposing two laminate films 1b and 1c and providing a joint portion 2 at the edge thereof. In providing the joint portion 2, it is necessary to partition the insertion portion 1 a and the opening 1 a 1 for introducing the nozzle N into the insertion portion 1 a by the inner joint line L, and the joint portion 2 is not provided at that portion. The insertion portion 1a must be capable of being attached in a close contact state with no gap formed on the entire outer periphery of the nozzle N, and preferably has a length substantially equal to the length of the nozzle N.

  In the sheet-like nozzle cap 1 having such a configuration, when the nozzle N is inserted into the insertion portion 1a through the opening 1a1, the entire inner side (inner wall surface or inner circumferential surface) is in close contact with the outer circumferential wall of the nozzle N (surface contact). Therefore, the spout N1 of the nozzle N can be reliably sealed under a stable mounting posture. Since the space between the inner wall surface of the sheet-like nozzle cap 1 and the outer peripheral wall of the nozzle N is maintained at a relatively high frictional force, the sheet-like nozzle cap 1 is not easily detached from the nozzle N.

As the sheet-like nozzle cap 1, a film composed of at least one layer of synthetic resin can be used, but in order to avoid air (oxygen) and moisture from passing through the wall surface of the sheet-like nozzle cap 1, An Al foil or a laminate film including a deposited layer of Al, Al ₂ O ₃ or SiO ₂ is used.

  It is desirable to use a laminate film having a thickness of about 50 to 120 [mu] m per sheet. This makes it possible to maintain the flexibility of the film itself, and the entire area of the inner wall surface of the sheet-like nozzle cap 1 is a nozzle. It can be brought into close contact with the outer peripheral wall of N (improvement of sealing performance). In particular, the sheet-like nozzle cap 1 formed using a laminate film containing an Al foil can maintain its shape as it is once attached to the nozzle N (good shape retention). There is an advantage that the sheet-like nozzle cap 1 can be easily attached to the nozzle N when 1 is attached to the nozzle N.

  As the laminate film, a film made of a layer structure of PET resin or the like (or nylon) + aluminum foil + PET resin or the like (or nylon) + polyolefin thermoplastic resin (polyethylene resin, polypropylene resin, etc.) or fluorine resin is applied. Is preferred.

  By forming a laminate film so that a layer of polyolefin-based thermoplastic resin or fluorine-based resin (PTFE, PFA, FEP, ETFE, PVDF, PCTFE, ECTFE, etc.) becomes the inner wall of the sheet-like nozzle cap 1, the polyolefin It becomes possible to make a thermoplastic resin or a fluorine-based resin function as a sealant layer, and when forming the joint portion 2, the films can be efficiently joined by heat sealing.

  Further, when the polyolefin-based thermoplastic resin or the fluorine-based resin is positioned on the inner peripheral surface of the sheet-like nozzle cap 1, even if the contents adhere to the inner peripheral surface, a chemical reaction between them will occur. Since it hardly occurs, there is an advantage that the contents can be easily peeled and removed. In addition, said layer structure shows an example, The sheet-like nozzle cap 1 of this invention is not limited to this layer structure.

FIG. 3 is a view showing another example of the sheet-like nozzle cap 1 suitable for the present invention. In this example, an ear 3 (made of the same laminate film as the sheet-like nozzle cap 1) is provided by extending the joint 2 to the edge of the sheet-like nozzle cap 1, in particular, the edge of the joint 2. It is a thing.

  The ear | edge part 3 can be used as a knob | pick part convenient for pinching and handling the sheet-like nozzle cap 1 of this invention with a finger | toe.

The sheet-like nozzle cap 1 suitable for the present invention can be manufactured by stacking two laminated films to form the joint portion 2 and punching the laminated film in accordance with the external shape of the nozzle N. In particular, the sheet-like nozzle cap 1 provided with the ear portion 3 does not need to be punched in accordance with the shape of the nozzle N and only needs to be cut to a length including the insertion portion 1a. There is an advantage that can be manufactured.

  FIG. 4 is an example in which a tongue piece 4 integrated with the film 1b is provided at the end edge of the laminate film 1b where the opening 1a1 of the insertion portion 1a is located. By providing the tongue piece 4, the insertion portion 1 a opening 1 a 1 can be easily opened, and the attachment of the sheet-like nozzle cap 1 to the nozzle N is facilitated. In addition, the tongue piece 4 can be provided in any one or both of the laminate films 1b and 1c. Further, instead of providing the tongue piece 4, at least one of the laminate films 1b and 1c is provided with a notch 5 as shown in FIG. 5, or the laminate films 1b and 1c in which the opening 1a1 is located as shown in FIG. The edges may be shifted from each other, and in this case, the opening 1a1 of the insertion portion 1a can be easily opened.

  FIG. 7 shows an example in which a non-joining portion 2 ′ is provided at the edge of the laminate films 1 b and 1 c where the opening 1 a 1 of the insertion portion 1 a is located. In such a sheet-like nozzle cap 1, as shown in FIG. 8, the laminate films 1b and 1c can be separated from each other starting from the non-joining portion 2 ′. In this case, the opening 1a1 of the insertion portion 1a is opened. It becomes easy to do. The sheet-like nozzle cap 1 shown in FIG. 7 shows an example in which the edges of the laminated films 1b and 1c are aligned, but the end faces of the laminated films 1b and 1c are shown in FIG. Needless to say, they can be offset from each other.

In the preferred embodiment of the present invention, an example in which the nozzle N is applied to a frustoconical shape is shown as an example, and the shape of the insertion portion 1a is adapted to the appearance shape of the nozzle N. The shape can be appropriately changed in accordance with the external shape of the nozzle, and is not limited to the illustrated shape.

  FIG. 9 shows still another example of the sheet-like nozzle cap 1 according to the present invention, which is configured by providing the inner joint line L formed by the joint portion 2 with a bulging portion 2a protruding at the opening 1a1 of the insertion portion 1a. It is the figure which showed the example of. The bulging part 2a is formed by joining the films (laminate films 1b and 1c) with a joining means such as heat seal, like the joining part 2. In the sheet-like nozzle cap 1 provided with the bulging portion 2a protruding at the opening 1a1 of the insertion portion 1a, when the sheet-like nozzle cap 1 is attached to the nozzle N, the principal portion thereof is shown in FIG. The protruding portion 2a is pressure-bonded by contact with the outer peripheral wall (outer surface) of the nozzle N, and the force generated by the spring back of the bulging portion 2a acts as a tightening force (arrow in the figure) of the sheet-like nozzle cap 1. As a result, the sheet-like nozzle cap 1 is firmly attached to the nozzle N. FIG. 10 shows the state in which the laminate film 1b is removed. The bulging portion 2a may be crushed while being peeled at least partially with a pushing force when the sheet-like nozzle cap 1 is attached to the nozzle N. When the bulging portion 2a is crushed while being peeled off, the contact of the sheet-like nozzle cap 1 with the outer peripheral wall of the nozzle N is further improved.

  As shown in FIG. 11, the bulging portion 2a can also be provided on the inner joining line L at the position opposite to the opening 1a1 of the insertion portion 1a, whereby the tightening force of the sheet-like nozzle cap 1 on the nozzle N is increased. It will increase even more.

  FIG. 12 shows an example in which the bulging portion 2a is provided in the inner joint line L in the vicinity of the opening 1a1 (inside the opening 1a1 (position on the distal end side of the insertion portion 1a)). It is the example which provided the part 2a in the inner side joining line L located in the center part of the longitudinal direction of the insertion part 1a. In any structure, the tightening force of the sheet-like nozzle cap 1 on the nozzle N is increased as in the case shown in FIG. For example, as shown in FIG. 14, the bulging part 2a can be provided continuously or intermittently at the same site.

  The side surface shape of the bulging portion 2a can be a semicircular shape (including an ellipse), and can also be a triangular shape, a rectangular shape, or a trapezoidal shape as shown in FIGS. It is possible and its shape can be changed arbitrarily.

  The bulging portion 2a only needs to protrude to the insertion portion 1a side from the inner joining line (outer edge of the insertion portion 1a) L of the joining portion 2, and the protrusion allowance t (see FIG. 15A) is t at the maximum. = 1.0 mm is preferable, so that the bulging portion 2a is reliably crushed by the outer peripheral wall when the nozzle N is mounted, and the entire inner wall surface of the sheet-like nozzle cap 1 is the nozzle N. It will be in close contact with the outer peripheral wall. When the sheet-like nozzle cap 1 is attached to the nozzle N, the content may be discharged from the tip of the nozzle N to a length of about 5 mm, and the sheet-like nozzle cap 1 may be covered while maintaining the state. .

  FIG. 16 is an example in which a sub chamber 6 connected to the insertion portion 1a is provided at the distal end of the insertion portion 1a. In such a sheet-like nozzle cap 1, even if the content flows out from the spout N <b> 1 of the nozzle N in a state where it is attached to the nozzle N, the content related to the outflow can be received in the sub chamber 6. (After the contents are poured out, the inside of the container may be kept at a high pressure, and if the cap is attached immediately after the contents are poured out, the contents may flow out into the cap and the cap may shift. There). In this case, the contents remain in the sub chamber 6, but the contents can be easily removed by pushing from the outside of the sheet-like nozzle cap 1 toward the opening 1a1 after the contents are solidified. .

  FIGS. 17 (a) to 17 (d) show another sheet-like nozzle cap 1 according to the present invention formed by folding one laminated film and joining the overlapped portions by folding together by heat sealing. FIG. 18 is an external perspective view of the sheet-like nozzle cap shown in FIGS. 17A to 17D with the opening 1a1 being opened.

  The sheet-like nozzle cap 1 according to the present invention can be configured by using a single laminate film as shown in FIGS. 17A to 17B and FIG. Has the advantage that the amount of the laminate film used for producing the sheet-like nozzle cap 1 can be reduced.

  The bulging portion 2a can be formed of an annular body that can be crimped over the entire circumference of the outer peripheral wall of the nozzle N. By forming the bulging portion 2a from an annular body, the adhesion of the sheet-like nozzle cap 1 to the outer peripheral wall of the nozzle N is further improved, and when the sheet-like nozzle cap 1 is attached to the nozzle N, the bulging is caused. Since the force due to the spring back generated along with the crimping of the portion 2a is increased, the sheet-like nozzle cap 1 can be firmly fixed to the nozzle N.

  FIG. 19 is a diagram showing a sheet-like nozzle cap 1 according to the present invention, in which an inner radius L (R) 7 that expands the opening dimension of the insertion portion 1a toward the opening 1a1 is provided in the inner joining line L of the joining portion 2. It is.

  In such a sheet-like nozzle cap 1, the opening 1 a 1 is easily opened, so that the sheet-like nozzle cap 1 can be easily attached to the nozzle N. In addition, in FIG. 19, what attached | subjected R (R) 7 was shown as an example, but as shown in FIG. 20, you may provide the inclination 8 instead of R (R) 7.

  FIG. 21 is a view showing an example of a sheet-like nozzle cap according to the present invention, which is provided with a line to be cut and cut 9 formed by reducing the thickness of the laminate film.

  Such a sheet-like nozzle cap 1 forms a through-opening connected to the insertion portion 1a by cutting the laminate film from one end edge toward the other end edge along the planned cutting-off line 9. By setting the size of the through hole in advance to be smaller than the size of the spout N1 of the nozzle N, a small amount of content can be poured out while the sheet-like nozzle cap 1 is attached to the nozzle N. It becomes possible. It is also possible to provide a plurality of scheduled stripping lines 9 at intervals, thereby making it possible to vary the amount of content to be dispensed.

  FIG. 22 shows that after a single laminate film is folded, the overlapped portions by folding are joined to each other by heat sealing to form a joined portion 2 and are raised on the opposing wall surface of the bulging portion 2a of the inner joining line L It is the figure which showed the example of the sheet-like nozzle cap 1 according to this invention comprised by providing the part 10. FIG.

  In the sheet-like nozzle cap 1, the bulging portion 2a and the raised portion 10 are respectively pressed against the outer peripheral wall of the nozzle N, so that the tightening force of the sheet-like nozzle cap 1 on the nozzle N is further increased and the adhesion is improved. It becomes even better and a reliable seal is possible.

  The raised portion 10 can be formed by sandwiching the laminate film locally from both sides and closely adhering and bonding the portions to each other by heat sealing. Such a raised portion 10 is pressed against at least a part of the raised portion 10 by the pushing force when the sheet-like nozzle cap 1 is attached to the nozzle cap N, and is brought into close contact with the outer peripheral wall of the nozzle N. become. As shown in FIG. 23, a plurality of raised portions 10 may be provided in accordance with the number of the bulged portions 2a, or the raised portions 10 may be provided at positions shifted from the opposing wall surfaces of the bulged portions 2a. This point is not limited. The protrusion margin from the wall surface of the raised portion 10 can be equal to that of the bulging portion 2a.

  A sheet-like nozzle cap having the structure shown in FIG. 1 and made of a laminate film having a thickness of 80 μm including an Al foil is prepared, and the sheet-like nozzle is attached to a nozzle of an opened container filled with a silicon-based sealing material. As a result of investigating the solidification state of the contents with the cap attached, when the sheet-like nozzle cap according to the present invention was attached, the contents were not solidified even after one month or more had elapsed. It was confirmed that the permanent quality can be maintained.

  According to the present invention, it is possible to provide a sheet-like nozzle cap that can reliably seal the nozzle spout under a stable mounting posture.

DESCRIPTION OF SYMBOLS 1 Sheet-like nozzle cap 1a Insertion part 1a1 Opening 1b, 1c, 1d Laminating film 2 Joining part 2 'Non-joining part 2a Swelling part 3 Ear part 4 Tongue piece 5 Notch part 6 Sub chamber 7 R (R)
8 Inclination 9 Pulling and shredding line 10 Raised part N Nozzle N1 Outlet L Inner joint line

Claims (8)

A cap that is detachably attached to the nozzle and holds the spout of the nozzle hermetically,
The cap has an opening through has a bag-like insertion portion to be mounted on at least the tip portion of the nozzle, Ri entire area of the inner wall surface of the insertion portion is Do a laminate film of two-ply-adherable to the outer peripheral wall of the nozzle,
The two-ply laminate film has an inner joint line that partitions the insertion part and the opening, and has a joint part that joins the laminate films to each other,
The inner joint line, the opening, and wherein the Rukoto that Yusuke protrudes one or more of the bulging portion can be pressed against the outer peripheral wall of the nozzle at least one portion of the proximity and the insertion portion of the opening Sheet-like nozzle cap.   The sheet-like nozzle cap according to claim 1, wherein the two-ply laminate film has an ear portion that can be used as a knob at an edge thereof. The opposite wall of the bulge portion, locally mutually close contact with inner surfaces of the laminate film, is formed by bonding, according to claim 1 or characterized in that it has a raised portion that can be crimped to the outer peripheral wall of the nozzle The sheet-like nozzle cap described in 2 . The inner joint line, sheet-like nozzle cap as set forth in claim 1, characterized in that it comprises a slope or rounded (R) to enlarge the opening dimension of the insertion portion toward the opening . 2. The two-ply laminate film is formed by stacking Al foil or a laminate of plastic films including a deposited layer of Al, Al ₂ O ₃ or SiO ₂ on each other. sheet nozzle cap as set forth in any one of 1-4. The sheet-like nozzle cap according to any one of claims 1 to 5 , wherein the two-layer laminate film has a thickness of 50 to 120 µm per sheet. The sheet-like nozzle cap according to any one of claims 1 to 6 , wherein an inner wall of the insertion portion is made of a layer of a polyolefin-based thermoplastic resin or a fluorine-based resin. The two-ply laminate film has at least one planned cutting line that forms a through-hole connected to the insertion portion by cutting the two-ply laminate film from one end edge toward the other end edge. The sheet-like nozzle cap according to any one of claims 1 to 7 , characterized by comprising:

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