JP4888938B2 - Can container resealable with cap - Google Patents

Description

  The present invention relates to a can container that can be resealed (resealed) with a cap, and more particularly, to a can container to which an aseptic filling method is applied, in which a cap is attached to the mouth and neck and the can bottom is opened. On the other hand, the present invention relates to a can container in which the contents are filled from the can bottom side in a state where the can body is inverted, and then the bottom cover is wound and fixed to seal the can bottom side.

For metal can containers such as bottle-shaped cans that can be resealed with caps with screws, the recycling rate of resources, light-shielding properties, gas permeation resistance, rapid cooling properties, etc. In recent years, it has been widely used in the beverage can market with various beverages as its contents. In such metal can containers, the filling and sealing of contents with existing canning equipment After filling the contents from the can bottom side with the can body inverted, the can body with the cap attached to the mouth and neck and the can bottom side opened can be It has been conventionally known from Patent Document 1 below that the lid is wound and fixed to seal the bottom of the can.
Japanese Patent Laid-Open No. 2002-128193

  By the way, with a can container that can be resealed (resealed) with a cap and filled with the contents from the bottom of the can as described above, the aseptic filling method (substantially sterilized in an aseptic atmosphere) When applying the method of filling and sealing sterilized contents in a container), the filling and sealing process is applied to the can body in which the cap is attached to the mouth and neck and the bottom of the can is opened. Before entering, it is necessary to wash and sterilize the inner surface side of the can body in advance.

  On the other hand, in the conventional can container that can be resealed by the cap, the inner surface (back surface) side of the top plate of the cap in order to ensure sufficient sealing at the opening end of the mouth and neck portion to which the cap is attached A sealing resin liner provided on the head and neck is in close contact with the curled portion formed at the opening end of the mouth-and-neck portion. Specifically, for example, as shown in FIG. 6, an inner annular portion 38 a is pressed while the curled portion 21 a is held by the central portion 38 b by a resin liner 38 having an inner annular portion 38 a, a central portion 38 b, and an outer annular portion 38 c. And the outer annular portion 38c.

  Therefore, when cleaning and sterilizing the inner surface side of the can body, it is between the inner surface side of the mouth and neck portion of the can body and the resin liner of the cap (in the conventional example shown in FIG. 6, the inner portion of the curled portion 21a). And the inner annular portion 38a of the liner 38), it is difficult for the cleaning liquid and the sterilizing agent to enter, and the sterilization of this portion may be insufficient.

  An object of the present invention is to solve the above-described problems. Specifically, the present invention is a can container to which an aseptic filling method is applied, and a can bottom side of a can body having a cap attached to the mouth and neck. Therefore, it is an object of the present invention to make it possible to easily and sufficiently clean and sterilize the inner surface side of a can body in which the contents are filled and sealed.

In order to solve the above-mentioned problems, the present invention is a can container to which an aseptic filling method is applied in which a sterilized container is filled and sealed in a sterilized container in a substantially aseptic atmosphere. After filling the contents from the bottom of the can body with the can body turned upside down with respect to the can body with the cap attached to the part and opening the bottom of the can, In the can container that seals, the open end of the mouth and neck portion is sealed by adhesion of a peelable seal lid, and the seal lid and the curl portion that is the tip portion of the mouth and neck portion of the can body are sealed. The cap is mounted on the mouth neck so that it can be resealed from above the sealing lid so that the inner surface side of the cap is in close contact with the adhesive portion between the end surface and the outer surface from the outside. is there.

  According to the can container which can be resealed by the cap of the present invention as described above, when the inner surface side is cleaned and sterilized with respect to the can body in which the cap is attached to the mouth and neck part and the can bottom side is opened, The inner surface of the mouth and neck can be easily and sufficiently cleaned and sterilized with a cleaning solution or disinfectant without being interrupted by a sealing liner provided on the top plate of the cap, and cans can be bonded with a seal lid. The container can be sufficiently sealed. Also, when resealing (resealing) with a cap after the seal lid is peeled off and the can container is opened, the inner surface of the cap (such as a liner provided on the inner surface side) is brought into close contact with the distal end portion of the mouth and neck. Thus, the resealability can be sufficiently secured.

  A can container to which a sterilized filling method in which sterilized contents are filled and sealed in a sterilized container in a substantially aseptic atmosphere, with a cap attached to the mouth and neck and an open bottom of the can On the other hand, after filling the contents from the bottom side of the can with the can body inverted, the inner surface side of the can body is sealed on the bottom side of the can body by tightening and fixing the bottom lid. The purpose of enabling easy and thorough cleaning and sterilization is to seal the open end of the mouth and neck by adhering a peelable seal lid, as specifically shown in the following examples as the best mode. The cap is re-sealably attached to the mouth and neck from above the seal lid so that the inner surface of the cap comes into close contact with the adhesive portion between the seal lid and the tip of the mouth and neck. Realized.

  As shown in FIG. 1, a can container 1 of this embodiment is a wide-mouth reseal can (a can which is a kind of a deformable bottle-type can) having a relatively small shoulder portion with a small difference in diameter between the mouth-and-neck portion and the trunk portion. A seamless can body 2 in which the mouth / neck part 21, the shoulder part 22 and the body part 23 are integrally formed from a well-known metal plate for can manufacturing, and the mouth / neck part 21 is made of metal. The pilfer proof cap 3 as a separate part is mounted so that it can be resealed (resealed) by screwing by roll-on molding using a known cap mounting device (capper). A bottom lid 4 made of metal and made of a separate part is integrally wound and fixed to the lower end of 23 by a known can lid winding device (seamer).

  As shown in FIG. 2, an outer curled portion 21a is formed at the opening end of the upper end of the mouth / neck portion 21 of the can body (can main body) 2 of such a can container 1, and below the upper portion An inclined portion 21b having a reduced diameter is formed, a screw portion 21c is formed on the lower peripheral wall, and an annular bead portion 21d is formed below the screw portion 21c.

  Further, the cap 3 mounted on the mouth neck portion 21 of the can body 2 by roll-on molding is press-molded in a cup shape from a well-known metal plate for cap, and as shown in FIG. Slits 33 and knurls 34 are alternately formed along the circumferential direction on the upper portion of the skirt portion 32 depending from the outer edge of 31, and a screw portion 35 is formed on the lower peripheral wall thereof, below the screw portion 35, A weakened portion 36 that can be broken along the circumferential direction is formed. Below the weakened portion 36 that is broken at the time of opening is a pilfer proof ring 37 for opening display.

  Note that the can container 1 of the present embodiment as described above is applied with an aseptic filling method in which the sterilized contents are filled and sealed in a sterilized container in a substantially aseptic atmosphere. When filling and sealing the contents in the can by the aseptic filling method, before the filling / sealing process is started for the can body in which the cap is attached to the mouth and neck and the bottom of the can is opened, the washing liquid The inner surface side of the can body 2 is previously cleaned and sterilized by a sterilizing agent.

That is, in the can container 1 of the present embodiment, the cap 3 is already attached to the mouth and neck portion 21 of the can body 2 as shown in FIG. The lower end of the body portion 23 of the body 2 is formed in the flange portion 24 by being subjected to neck and flange processing, but the bottom lid is not yet tightly fastened and the bottom of the can is left wide open. ing.

  In the case of the aseptic filling method, the can body in which the cap is attached to the mouth and neck and the can bottom side is opened is sterilized in advance before the filling and sealing process in a substantially aseptic atmosphere. Therefore, the inner surface side of the can body is previously cleaned and sterilized with a cleaning liquid or a sterilizing agent. And after the inner surface side of the can body was cleaned and sterilized in such a manner, the sterilized contents were filled from the can bottom side in a state where the can body was inverted so that the opened can bottom side would be up After that, the sterilized bottom lid is wound and fixed to the can body (flange portion 24) to seal the can bottom side.

  Specifically, for example, using a can body that has been shrink-wrapped so that no germs can enter with the cap attached and shipped from the can manufacturing factory, unpack the contents at the content filling factory, After aseptically cleaning, carry in an almost aseptic atmosphere, sterilize by attaching a sterilizing agent to the inner and outer surfaces, wash the attached sterilizing agent, dry with hot air, and then fill in an approximately aseptic atmosphere In the sealing step, the sterilized contents are filled in an inverted can with the cap down, the bottom of the can is sealed with a sterilized bottom lid, and then the container is carried out from a substantially aseptic atmosphere.

  By the way, in the can container 1 of the present embodiment as described above, the cap 3 attached to the mouth / neck portion 21 of the can body 2 has a skirt on the inner surface side of the top plate portion 31 as shown in FIG. A resin liner 38 made of a hard polyolefin resin or the like is integrally provided in the vicinity of the corner portion following the portion 32. An example of the synthetic resin used as the material of the resin liner 38 is, for example, heat resistance obtained by mixing a predetermined amount of hydrogenated styrene / conjugated diene block copolymer, liquid paraffin, polypropylene resin, fine powder talc, and the like. There is no resin.

In the cap 3 provided with such a resin liner 38, the cap 3 is put on the mouth and neck portion 21, and the cap 3 is attached to the mouth and neck portion 21 by a known cap attaching device (capper). 3, by pressing a roll from the side, a screw 35 is formed on the peripheral wall of the skirt portion 32, and the lower end portion of the pill fur proof ring 37 is narrowed to the lower side of the annular bead portion 21 d of the mouth and neck portion 21. together, by narrow down slightly the upper end of the skirt portion 32, and a resin liner 38 is pressed against the upper end surface and the outer surface of the curled portion 21a and a distal portion of the neck 21.

  As shown in FIG. 4, a sealing lid made of a thin film is formed on the mouth / neck portion 21 of the can body 2 with respect to the cap 3 so mounted, as shown in FIG. 4. 5 is attached to the distal end portion of the mouth-and-neck portion 21 (the upper end surface and the outer side surface of the curled portion 21a) so as to be peeled off. The seal lid 5 and the distal-end portion of the mouth-and-neck portion 21 (the curled portion 21a The cap 3 is attached to the mouth and neck portion 21 from above the seal lid 5 so that the resin liner 38 comes into close contact with the adhesive portion between the upper end surface and the outer surface. The seal lid 5 is partially formed with a tab 5a that becomes a knob during the peeling operation.

  For the seal lid 5 that is peelably bonded to the tip portion of the mouth-and-neck portion 21 of the can body 2 (the upper end surface and the outer surface of the curl portion 21a), an aluminum foil single layer film, It is composed of a laminated film such as an ethylene vinyl alcohol copolymer resin that does not transmit oxygen and is sandwiched between an olefin resin such as polypropylene or a polyethylene terephthalate resin, and the tip of the mouth-and-neck portion 21 via an adhesive. It is glued to the part.

  As an adhesive for adhering the seal lid 5, a heat-sensitive adhesive or a pressure-sensitive adhesive can be used, and its thickness is about 200 μm at the maximum. Examples of the heat sensitive adhesive include polyethylene terephthalate resin, polyvinyl ether resin, chlorinated polypropylene resin, and graft-modified polypropylene resin. Pressure sensitive adhesives include acrylic rubber resin, Isobutylene resin, polychloroprene resin, etc. can be used.

  In addition, when using a heat sensitive adhesive, a high sealing performance can be obtained by the strong adhesive force by the welding of the resin by the heat sealing method. On the other hand, in the case of using a pressure sensitive adhesive, the production speed is increased by adhering the seal lid 5 by the pressure at the time of attaching the cap, compared to the case of using the heat sensitive adhesive and adhering by the heat seal method. In addition, when opening the can container, the seal lid 5 can be peeled off with a small force, and the opening operation can be easily performed.

  As described above, according to the can container 1 of the present embodiment in which the seal lid 5 is detachably bonded to the distal end portion of the mouth-and-neck portion 21, the cap 3 is attached to the mouth-and-neck portion 21 and the can bottom side is opened. When the inner surface side of the can body 2 is cleaned and sterilized, it is not obstructed by the sealing resin liner 38 provided on the top plate portion 31 of the cap 3. The inner surface can be easily and sufficiently cleaned and sterilized with a cleaning liquid or a sterilizing agent, and the cleaning process and the sterilizing process can be simplified.

  Moreover, about the sealing performance of the can container 1 before opening, sufficient sealing performance can be ensured because the sealing lid 5 is adhered so as to seal the opening end of the mouth and neck portion 21. Furthermore, in this embodiment, the cap 3 is attached to the mouth / neck portion 21 so that the resin liner 38 is in close contact with the adhesive portion between the seal lid 5 and the tip portion of the mouth / neck portion 21 from the outside. Accordingly, when the can container 1 is resealed (resealed) with the cap 3 after the seal lid 5 is peeled off and the can container 1 is opened, the resin liner 38 on the inner surface side of the cap 3 is placed in the mouth neck portion. Adhering to the tip of 21 can ensure sufficient reseal (reseal) properties.

  In the case of a wide-mouth resealable can with a large diameter at the open end of the mouth and neck, in the conventional one without the seal lid 5, if the cap is opened carelessly with the can tilted even a little, the contents in the can There is a risk that things will spill, but in the wide mouth reseal can of this example, the opening end of the mouth and neck is sealed by the seal lid 5, so even if the cap is opened with the can tilted, There is no risk of the contents in the can spilling.

  As mentioned above, although one Example of the can container which can be resealed with the cap of this invention was described, this invention is not limited only to the above Examples, It can change a design suitably. Needless to say.

  That is, for example, the target can container is not limited to a wide-mouthed resealable can with a relatively small shoulder, but a large difference between the diameter of the mouth and neck and the trunk. A bottle-shaped can having a general shape having a relatively large shoulder may be used. In the case of a bottle-shaped can with a general shape, a holder for holding the can body in an inverted state is required when sealing and filling from the bottom of the can with the can body in an inverted state with the cap down. However, in the case of the wide-mouthed reseal can shown in the above embodiment, the can body stably stands up even in the inverted state with the cap down, so a holder for holding the can body is not necessary, The contents can be filled and sealed while being conveyed in an inverted state.

  In addition, for the can body (can body) of the can container, one end side of the cylindrical welded can body is connected to the shoulder portion and the mouth and neck portion, in addition to the seamless one in which the mouth and neck portion, the shoulder portion and the body portion are integrally formed. Reduced-diameter processing, a cylindrical weld can body whose diameter is enlarged at the center, and a shoulder and mouth-neck are formed on one end, and a can lid with a mouth-and-neck and shoulder integrally formed May be fastened and fixed to one end of a cylindrical welding can body. As such a cylindrical welded can body, for example, a thin iron plate having a thickness of about 0.3 mm in which a synthetic resin film such as polyethylene terephthalate having a thickness of about 12 μm is laminated on at least the surface on the inner surface side of the can. A welded can body that is welded in a cylindrical shape and at least the inner surface side of the welded portion is repair-painted with a synthetic resin such as polyethylene terephthalate is used.

  In addition, the cap of the can container is not limited to a metal cap but may be a resin cap, and is not limited to a cap having a pill fur proof function, but a cap having no pill fur proof function. In particular, in the can container of the present invention, even if the cap itself does not have a pilfer proof function, the opening end of the mouth and neck is sealed with a peelable seal lid, so that this seal A pilfer proof function can be achieved depending on whether or not the lid is peeled off. Therefore, by not providing a pilfer proof ring in the cap, the cap can be reduced in weight, and the material cost of the cap can be reduced.

  Furthermore, on the inner surface side of the cap of the can container, in this embodiment, a resin liner is provided on the inner surface side of the cap in order to ensure sufficient reseal (reseal) property, but such a liner is provided. For example, as shown in FIG. 5 (showing the portion without the seal lid knob) by providing the seal lid with cushioning properties with a thickness of about 1 mm, for example, The liner may be omitted.

The side view which shows the wide mouth reseal can which concerns on one Example of the can container of this invention. The side view which shows the can main body (part except the cap and the bottom cover) of the can container shown in FIG. The side view which shows the state before the bottom cover of the can container shown in FIG. The partial expanded sectional view which expands and shows a part of cap and mouth neck part of the can container shown in FIG. The partially expanded sectional view which expands and shows a part of cap and mouth neck part of a can container about the other Example of this invention. The partial expanded sectional view which expands and shows a part of cap and mouth neck part of a can container about a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Can container 2 Can body 3 Cap 4 Bottom lid 5 Seal lid 21 Mouth and neck part 38 Resin liner

Claims (3)

A can container to which a sterilized filling method in which sterilized contents are filled and sealed in a sterilized container in a substantially aseptic atmosphere, with a cap attached to the mouth and neck and an open bottom of the can On the other hand, after filling the contents from the can bottom side with the can body inverted, the seal lid can be peeled off in a can container that tightly fastens the bottom lid and seals the can bottom side The opening end of the mouth and neck portion is sealed by bonding of the seal lid and the adhesive portion between the sealing lid and the upper end surface and the outer surface of the curl portion which is the tip portion of the mouth and neck portion of the can body from the outside. A can container which can be resealed by a cap, wherein the cap is resealably mounted on the mouth and neck from above the seal lid so that the inner surface side of the cap is in close contact.   2. The reseal with a cap according to claim 1, wherein the inner surface of the cap is in intimate contact with the outer side of the bonding portion between the distal end portion of the mouth and neck and the seal lid via a resin liner. Possible can container.   The can container which can be resealed with a cap according to claim 1, wherein the inner surface of the cap is in direct contact with the outer side of the bonding portion between the tip of the mouth and neck and the sealing lid.

Images