JP2006168805A - Packaging container and packaging method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging container where no mold or the like grows even if its stored content is held at its film part, a peeling of the film is positively prevented and the film is prevented from being damaged. <P>SOLUTION: The packaging container is provided with: a container main body 1 having an annular flange 2 at an opening edge of its upper surface; and a sealing film 3 heat sealed at the upper surface of the flange 2 to cover the opening of the container main body 1. The connected surface between the flange 2 and the sealing film 3 is provided with: a first seal part 4 connected to a part near inside of the flange 2 in a ring-shape manner to seal the inner part of the container main body 1; and a second seal part 7 connected at a part nearer to the outside than the first seal part 4 in a multi-overlapped ring to prevent a peeling of the sealing film 3, thereby even if the stored content is held between the upper surface of the flange 2 and the sealing film 3, the stored content held at this part is shut off from the surrounding atmosphere by the multi-overlapped ring-like adhering portions and then no mold or the like grows there. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention mainly relates to a packaging container and method for packaging foods with high moisture content such as jelly and pudding.

  Conventionally, as food packaging containers for packaging foods with high moisture content such as jelly and pudding, food is put into a container body made of a thermoplastic resin formed in a cup shape and provided with a flange on the upper surface opening. The inner food is sealed by heat sealing a synthetic resin film to the flange portion. Such a food packaging container needs to be completely sealed inside and must be able to be easily peeled off and opened at the time of use. As such a container, a simple opening container for food packaging described in Patent Document 1 below is disclosed.

In the conventional packaging container, as shown in FIG. 6, an annular seal 42 is formed on the inner side of the flange 40 provided on the opening edge of the container body 41, and the outer peripheral part thereof has A checkered knurled seal 43 is formed. The annular seal 42 seals the contents, and the knurled seal 43 prevents the film 44 from turning up.
JP-A-3-14476

  In the above conventional packaging container, after filling the container body 41 with the jelly liquid or pulp of the contents, the film 44 is covered on the upper surface of the flange 40, and the annular seal 42 and the knurled seal 43 are sandwiched by the heater 40 from above and below. Let it form. At this time, in order to prevent air from entering the sealed container as much as possible, the container main body 41 is filled to the extent that the jelly liquid or pulp overflows, and then the film 44 is covered and heat sealed. Therefore, as shown in FIG. 7, heat sealing with jelly liquid or pulp sandwiched between the upper surface of the flange 40 and the film 44 occurs on a daily basis.

  Thus, in the conventional knurl seal 43, since the pitch between the knurls is not bonded, the jelly liquid and the pulp sandwiched between these portions come into contact with the outside air. May cause troubles such as Further, in the conventional knurled seal 43, since the actual bonding area is small and the bonding portions exist in the form of dots, the knurling bonding force is not so strong. Therefore, when heat sealing is performed with the jelly liquid or pulp sandwiched between the upper surface of the flange 40 and the film 44, the portion becomes an unbonded region, and the film 44 is turned up. There was also a risk that the commercial value would be lost because the film 44 was peeled off before passing over. Moreover, in the knurled seal 43, as shown in FIG. 8, the knurled mold with the knurled cut is pressed against the film 44 for heat sealing, but when the knurled mold with the cut is pressed, the film is pressed. 44 is easily broken or damaged, and may cause a product defect, and there is a limit to increase the adhesive force by increasing the pressure during heat sealing.

  The present invention has been made in view of such circumstances, and does not generate mold even if the contents are caught, prevents the film from turning over, and prevents the film from being damaged. And the provision of methods.

  In order to achieve the above object, a packaging container according to the present invention includes a container body having an annular flange portion on the opening edge of the upper surface, and a sealing film that is heat-sealed on the upper surface of the flange portion and covers the opening of the container body. A first seal portion that is joined to the joint surface between the flange portion and the sealing film in a ring shape at a portion closer to the inside of the flange portion and seals the inside of the container body, and the first seal portion Also, the gist of the present invention is that it is configured to include a second seal portion that is joined in a multiple ring shape at a portion closer to the outside and prevents the sealing film from being turned over.

  Further, the food packaging method of the present invention provides a container body having an annular flange portion on the opening edge of the upper surface, and a sealing film that is heat-sealed on the upper surface of the flange portion and covers the opening of the container body, A first sealing portion that seals the inside of the container body by joining the joining surface of the flange portion and the sealing film in a ring shape at a portion closer to the inner side of the flange portion, and closer to the outer side than the first sealing portion. The gist of the present invention is to form a second seal portion that is joined in a multiple ring shape to prevent the sealing film from being turned over.

  The present invention provides a first seal portion for joining the joint surface of the flange portion and the sealing film in a ring shape at a portion closer to the inside of the flange portion to seal the inside of the container body, and the first seal. A second seal portion that is joined in a multiple ring shape at a portion closer to the outside than the portion to prevent the sealing film from being turned up is formed. As described above, since the second seal part is joined in a multiple ring shape, even if the contents are sandwiched between the upper surface of the flange part and the sealing film, the contents sandwiched in this part are multiplexed. It is blocked from the outside air by the ring-shaped adhesive part. Therefore, the trouble that mold | fungi generate | occur | produce according to a preservation | save state or a season like the conventional will not arise. In addition, since there are multiple ring-shaped firmly bonded portions, even if heat sealing is performed with some contents sandwiched between the upper surface of the flange portion and the sealing film, the portion is regarded as an unbonded region. There is almost no remaining, and it is prevented that the sealing film is turned up and peeled off before reaching the customer's hand and the commercial value is lost.

  In the present invention, when the first seal portion is formed by heat sealing the sealing film at the top of the annular protrusion formed on the flange portion, the first seal is formed at the top of the annular protrusion. Therefore, it becomes easy to secure the adhesive force of the first seal portion, and even if the contents are sandwiched between the flange portion upper surface and the sealing film and the portion remains as an unbonded region, the customer's It is possible to prevent the sealing film from peeling off before reaching the hand.

  In the present invention, the second seal portion is formed by pressing an upper mold having multiple ring-shaped seal protrusions onto the upper surface of the sealing film, and the multiple ring-shaped seal protrusions are provided in the respective seal protrusions. When the cross-sectional shape of the convex surface of the part is rounded, when the second seal part is formed, the sealing protrusion with the rounded cross-sectional shape of the convex surface is pressed against the sealing film to form a multiple ring. Therefore, when the multi-ring seal is formed, the sealing film is not damaged or broken. For this reason, generation | occurrence | production of the product defect by the failure | damage of a sealing film almost disappears. In addition, the multiple ring seal can increase the pressure and heating temperature of the upper mold to increase the adhesive strength, and even in this case, the sealing film is not damaged. For this reason, even if the contents are sandwiched between the upper surface of the flange and the sealing film, the contents sandwiched by the strong pressing force and the heating temperature can be eaten away and a multiple ring-shaped adhesive portion can be reliably formed. it can. For this reason, the contents can be reliably cut off from the outside air, and generation of mold and the like can be surely prevented. Moreover, even if the contents are sandwiched between the upper surface of the flange portion and the sealing film, the contents sandwiched by the seal protrusions with rounded cross-sections are cut off and the multiple ring-shaped bonding is ensured. Thus, the sealing film is turned up like before, and the product value is surely prevented from being peeled off before reaching the customer's hand. In addition, since heat sealing is performed with a seal projection having a round cross-sectional shape on the convex surface, the adhesive portion is in line contact, so that reliable adhesion is ensured and at the same time peeling is extremely easy and convenient to use.

  Next, the best mode for carrying out the present invention will be described.

  FIG. 1 is a view showing a packaging container of the present invention.

  The packaging container includes a container body 1 having an annular flange portion 2 on the opening edge of the upper surface, and a sealing film 3 that is heat-sealed on the upper surface of the flange portion 2 and covers the opening of the container body 1. ing.

  The container body 1 is made of a thermoplastic resin, and has a bottomed cylindrical shape and is formed with an annular flange portion 2 extending laterally at the upper opening edge. The flange portion 2 is formed with an annular protrusion 5 that protrudes from the upper surface at a slightly inner portion. The annular protrusion 5 is formed by bending a flat plate-like portion of the flange portion 2, and is formed by forming a concave portion on the lower surface and bulging to the upper surface side by the amount of the concave portion. .

  The sealing film 3 is formed of a thermoplastic resin film material, cut into a slightly larger circle than the outer periphery of the flange portion 2, and is peeled off at one end of the sealing film 3 during use. A substantially triangular knob portion 8 for picking with fingers is formed.

  And as shown in FIG. 2, it joins to the joining surface of the said flange part 2 and the sealing film 3 in the ring shape in the part near the inner side of the said flange part 2, and seals the inside of the container main body 1. FIG. A first seal portion 4 is formed. The first seal portion 4 is formed by heat-sealing the sealing film 3 at the top of the annular protrusion 5 formed on the flange portion 2.

  Further, a second seal portion that is joined to the joint surface between the flange portion 2 and the sealing film 3 in a multiple ring shape at a portion closer to the outer side than the first seal portion 4 to prevent the sealing film from being turned over. 7 is formed. The second seal portion 7 has a multiple ring shape in which a plurality of ring-shaped seals 6 are arranged concentrically.

  Since the sealing film 3 is heat-sealed at the top of the annular protrusion 5, the first seal portion 4 is sealed with a strong adhesive force for sealing the contents. On the other hand, the individual ring-shaped seals 6 constituting the second seal part 7 are basically for preventing the sealing film 3 from being turned up around the flange part 2 and are easily peeled off during use. To be able to do so, it is sealed with a weaker adhesive force than the adhesive force of the first seal portion 4. Adjustment of the adhesive strength of the seal portion can be appropriately adjusted according to factors such as temperature, pressure, and seal width during heat sealing.

  FIG. 3 is a process diagram showing the food packaging method of the present invention.

  This food packaging method includes a primary sealing step for forming the first seal portion 4, a secondary sealing step for forming the second seal portion 7, and a trimming step for cutting the sealing film 3 into a predetermined shape. Yes.

  In the primary sealing step, the container body 1 filled with the contents is placed in the opening of the lower mold 10 and is supported in a state where the flange portion 2 is locked to the lower mold 10. A sheet-like sealing film 3 is disposed on the upper opening of the sheet. In this state, the primary seal disc 12 is pressed from above the sealing film 3 and heat sealed, and the inner portion of the container body 1 is sealed by joining in a ring shape at a portion closer to the inside of the flange portion 2. 1 seal part 4 is formed. At this time, the 1st seal | sticker part 4 is formed by heat-sealing, and the top part of the cyclic | annular protrusion 5 formed in the flange part 2 and the sealing film 3 are welded.

  Next, in the secondary sealing step, the flange portion 2 on which the first seal portion 4 is formed is pressed against the sealing film 3 to heat-seal the secondary seal disc 13, and the first seal portion A second seal portion 7 that is joined in a multiple ring shape at a portion closer to the outer side than 4 to prevent the sealing film 3 from being turned up is formed. At this time, as shown in FIG. 4, the second seal portion 7 is formed by pressing an upper mold 9 having a multiple ring-shaped seal protrusion 11 against the upper surface of the sealing film 3. The multiple ring-shaped seal protrusions 11 are rounded in the cross-sectional shape of the convex surface of each seal protrusion 11.

  Next, in the trimming step, a cut 15 having a predetermined shape is put into the sealing film 3 on the outer peripheral portion of the flange portion 2 on which the first seal portion 4 and the second seal portion 7 are formed, and sealed with a trimming cutter 14. Form the lid of the stop film 3.

  As described above, the present invention seals the inside of the container main body 1 by joining the joining surface of the flange portion 2 and the sealing film 3 in a ring shape at a portion near the inside of the flange portion 2. 1 seal part 4 and the 2nd seal part 7 which joins in the shape of a multiple ring in the part near the outside of the 1st seal part 4 and prevents the sealing film 3 from turning up are formed. Thus, since the second seal portion 7 is joined in a multiple ring shape, even if the contents are sandwiched between the upper surface of the flange portion 2 and the sealing film 3, as shown in FIG. The contents sandwiched between these portions are blocked from the outside air by the multi-ring-shaped adhesive portion.

  Therefore, the trouble that mold | fungi generate | occur | produce according to a preservation | save state or a season like the conventional will not arise. In addition, since a multiple ring-shaped solid adhesive portion exists, even if heat sealing is performed with some contents sandwiched between the upper surface of the flange portion 2 and the sealing film 3, the portion is not bonded. The area is hardly left, and it is prevented that the sealing film 3 is turned up and peeled off before reaching the customer's hand and the commercial value is lost.

  Moreover, since the said 1st seal | sticker part 4 heat-seals and forms the sealing film 3 in the top part of the cyclic | annular protrusion 5 formed in the flange part 2, the 1st seal | sticker part 4 of the cyclic | annular protrusion 5 is formed. Since it forms in the top part, it becomes easy to ensure the adhesive force of the 1st seal | sticker part 4, Temporarily, the content is pinched | interposed between the flange part 2 upper surface and the sealing film 3, and the part remains as an unbonded area | region. Even so, the sealing film is prevented from peeling off before reaching the customer's hand.

  Further, the second seal portion 7 is formed by pressing an upper mold 9 having a multiple ring-shaped seal protrusion 11 against the upper surface of the sealing film 3, and the multiple ring-shaped seal protrusion 11 is respectively Since the cross-sectional shape of the convex surface of the seal projection 11 is rounded, the seal projection 11 having the round cross-sectional shape of the convex surface is formed on the sealing film 3 when the second seal portion 7 is formed. Since the multi-ring seal is formed by pressing, the sealing film 3 is not damaged or broken when the multi-ring seal is formed.

  For this reason, generation | occurrence | production of the product defect by the failure | damage of the sealing film 3 is almost lost. Further, the multiple ring seal can increase the pressure and heating temperature of the upper mold 9 to increase the adhesive force, and even in this way, the sealing film 3 is not damaged. For this reason, even if the contents are sandwiched between the upper surface of the flange portion 2 and the sealing film 3, the contents sandwiched by the strong pressurizing force and the heating temperature are eaten away to reliably form a multi-ring-shaped adhesive portion. can do. For this reason, the contents can be reliably cut off from the outside air, and generation of mold and the like can be surely prevented. In addition, even if the contents are sandwiched between the upper surface of the flange portion 2 and the sealing film 3, the contents sandwiched by the seal projection 11 having a rounded cross-sectional shape are cut off and the multiple rings are securely formed. Thus, it is possible to reliably prevent the sealing film 3 from turning up and peeling off before reaching the customer's hand and losing the commercial value. In addition, since heat sealing is performed with the sealing protrusion 11 having a round cross-sectional shape on the convex surface, the bonding portion is in line contact, so that reliable bonding is ensured and at the same time peeling during use is extremely easy and convenient.

  The present invention can be applied not only to confectionery with a high moisture content such as jelly and pudding, but also to various food packaging such as rice and curry, and is not limited to the type of contents. As long as it is hermetically packaged with a film, it can be applied to various fields.

It is a perspective view which shows the packaging container of this invention. It is a principal part expanded sectional view of the said packaging container. It is a figure explaining the process of the packaging method of this invention. It is a principal part expanded sectional view of the process of the said food packaging method. It is a figure explaining the effect | action of this invention. It is a perspective view which shows the conventional packaging container. It is a figure explaining the said conventional product. It is a figure explaining the said conventional product.

Explanation of symbols

1: Container body 2: Flange part 3: Sealing film 4: First seal part 5: Ring-shaped protrusion 6: Ring-shaped seal 7: Second seal part 8: Knob part 9: Upper mold 10: Lower mold 11: Seal Projection 12: Primary sealing board 13: Secondary sealing board 14: Trimming cutter 15: Cut 40: Flange 41: Container body 42: Annular seal 43: Knurled seal 44: Film

Claims (4)

  A container main body having an annular flange portion on the opening edge of the upper surface, and a sealing film that is heat-sealed on the upper surface of the flange portion and covers the opening of the container main body, and on the joint surface between the flange portion and the sealing film A first seal portion that is joined in a ring shape at a portion closer to the inner side of the flange portion and seals the inside of the container body, and is joined and sealed in a multiple ring shape at a portion closer to the outer side than the first seal portion. A packaging container comprising: a second seal portion that prevents turning-up of the stop film.   A container body having an annular flange portion at the opening edge of the upper surface and a sealing film that is heat-sealed on the upper surface of the flange portion and covers the opening of the container body are prepared, and a joint surface between the flange portion and the sealing film Are joined in a ring shape at the inner portion of the flange portion to seal the inside of the container body, and are joined in a multiple ring shape at the outer portion of the first seal portion. A packaging method comprising: forming a second seal portion for preventing the sealing film from being turned over.   The packaging method according to claim 2, wherein the first seal part is formed by heat-sealing a sealing film at the top of an annular protrusion formed on the flange part.   The second seal portion is formed by pressing an upper mold having multiple ring-shaped seal protrusions onto the upper surface of the sealing film, and the multiple ring-shaped seal protrusions are convex surfaces of the respective seal protrusions. The packaging method according to claim 2, wherein the cross-sectional shape is rounded.

Images