JP2019177905A - Package for heat treatment - Google Patents

Abstract

To provide a package for heat treatment which can be torn in any desired directions to open.SOLUTION: A package for heat treatment 10 has: a package body 11 including a first film 111 and a second film 112; a butt-seal part 12 which is provided to project from above the first film 111 toward outside and has a long shape provided approximately parallel to one side of the package body 11; a cut-guide part 13 which is provided on the first film 111 and the second film 112 and approximately parallel to the butt-seal part 12; and a to-be-torn area 14 sandwiched between the butt-seal part 12 and the cut-guide part 13 when the package body 11 is plan-viewed. The package body 11 can be opened by tearing from at least one end in the longitudinal direction of the to-be-torn area 14, and the cut-guide part 13 has a function to prevent the package body 11 from being torn beyond the cut-guide part 13 when being torn to open.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a package that heats the contents.

  Conventionally, food products such as cooked foods or semi-cooked foods are filled in a heat-resistant plastic package, and packaged foods that are cooked by a microwave oven immediately before being eaten are provided on the market. However, when such packaged foods are heated by a microwave oven, the internal pressure rises due to the thermal expansion of the water vapor and the internal air inside the package, and the package bursts and the contents scatter, There was a drawback of contamination.

  Prior to microwave cooking, a method of preventing bursting of the package by opening a small hole in the package in advance to suppress an increase in internal pressure has been adopted. However, in this method, the generated water vapor is immediately released to the outside of the package, and not only the steaming cooking effect by the water vapor is reduced, but also the food inside the package is dried and the taste is deteriorated. Sometimes. Then, the package which formed the easy peel part which vaporizes and releases pressure when the internal pressure of a package rises is known.

  In Patent Document 1, the same surface sides are brought into contact with each other by a plastic film, and a joint-joining portion is provided to join in a joint-like shape by heat sealing with a predetermined width, and a self-supporting means is formed at the bottom, and the interior is heated. In a package that seals and wraps the contents for processing, the joint joint is located above the upper surface of the stored contents when the package is self-supported, and the internal pressure of the package due to heating is A package for heat treatment is described which is an easy-open seal that releases pressure when it rises.

JP 2000-185777 A

  However, the package for heat treatment described in Patent Document 1 is configured to be opened substantially parallel to the horizontal side by tearing from a notch for opening provided in the vicinity of the palm joint (joint seal portion) 5. However, there are cases where the tearing direction does not advance in the target direction, that is, in the direction substantially parallel to the horizontal side, and depending on the direction, the contents may leak out or the contents may become difficult to take out. was there.

  Then, an object of this invention is to provide the package for heat processing which can be torn in the direction aimed at the time of opening.

  The package for heat treatment according to the present invention is a package for heat-treating the contents, and is a bag-like package body provided with a first film and a second film facing each other, A long joint seal portion provided so as to protrude outward from above the first film and provided substantially in parallel with one side of the package body; the first film and / or the first film; In a region sandwiched between the palm seal portion and the cut guide portion when the package body is viewed in plan on the film 2 and the cut guide portion provided substantially parallel to the palm seal portion. A tear region configured, and the package body can be opened by tearing from at least one end in the longitudinal direction of the tear region, and the cut guide portion is formed of the package body. When tearing A function to prevent tearing beyond the serial cutting guide unit.

  ADVANTAGE OF THE INVENTION According to this invention, the package for heat processing which can be torn in the direction aimed at the time of opening can be provided.

It is a typical perspective view which shows the structure in one Embodiment of the package for heat processing which concerns on this invention. It is a top view which shows the structure in one Embodiment of the package for heat processing which concerns on this invention. It is a typical perspective view which shows the decomposition | disassembly state of the package for heat processing shown in FIG. It is a typical enlarged view which shows the structure of the palm seal part in one Embodiment of the package for heat processing which concerns on this invention. It is a top view which shows the structure in other embodiment of the package for heat processing which concerns on this invention.

  One Embodiment of the package for heat processing which concerns on this invention is described, referring drawings. The package for heat treatment according to the present invention is suitable for use in heat-treating the contents with a microwave oven, and is suitable for use in heat-treating the foodstuff.

  FIG. 1 is a schematic perspective view showing a configuration in one embodiment of a heat treatment packaging body according to the present invention, and FIG. 2 shows an exploded configuration in one embodiment of a heat treatment packaging body according to the present invention. FIG. 3 is a schematic perspective view showing a disassembled state of the heat treatment packaging body shown in FIG. 1, and FIG. 4 is a palm in one embodiment of the heat treatment packaging body according to the present invention. It is a typical enlarged view which shows the structure of a seal part. In the following description, the upper side in FIG. 2 is “upper” and the lower side is “lower”.

  As shown in FIGS. 1 and 2, the heat treatment packaging 10 is provided on the packaging body 11, the palm seal portion 12 provided on the packaging body 11, and the packaging body 11. The cut guide part 13 provided substantially in parallel with the part 12, the tear area | region 14, and the notch part 15 for opening are provided.

The package body 11 has a self-supporting property, and can be self-supported in a state in which the predetermined content 1 is stored therein.
As shown in FIG. 1, the package body 11 is self-supporting with a first film 111 provided with a palm seal portion 12 and a second film 112 provided in opposition to the first film 111. And a third film 113 serving as a bottom when the film is formed.

  The first film 111 and the second film 112, the first film 111 and the third film 113, and the second film 112 and the third film 113 are joined (sealed) at a part of their peripheral portions. Thus, the package body 11 has a bag shape.

  The package body 11 composed of the first film 111, the second film 112, and the third film 113 has heat resistance against heating of the microwave oven in consideration of heat treatment by the microwave oven. It is preferable that it is formed of a plastic material. Specific examples of such plastic materials include polyolefins such as polyethylene and polypropylene; halogenated polyolefins such as polyvinylidene chloride and polyvinylidene fluoride; polyvinyl alcohol; nylon 6, nylon 6,6, polymetaxylylene adipamide, and the like. Polyamides; Polyesters such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polybutylene naphthalate; polyacrylates such as poly (meth) acrylate methyl, poly (meth) ethyl acrylate, poly (meth) acrylate butyl, etc. And a copolymer of monomers forming these; “(Meth) acryl” means methacryl or acryl.

  Specific examples of polyethylene include linear low density polyethylene, high pressure method low density polyethylene, high density polyethylene, and metallocene polyethylene. Specific examples of polypropylene include a homopolymer of propylene and a random or block copolymer of propylene and ethylene or 1-butene.

  The first film 111, the second film 112, and the third film 113 may be a single layer, but may be laminated in two or more layers by coextrusion or the like. For example, the first film 111, the second film 112, and the third film 113 preferably include a base material layer and a sealant layer, and further include another layer between the base material layer and the sealant layer. May be. Specifically, as the first film 111, the second film 112, and the third film 113, a laminate in which a polyamide film serving as a base material layer and a linear low-density polyethylene film serving as a sealant layer are bonded together. A film can be used. The first film 111, the second film 112, and the third film 113 may be a gas barrier composite film provided with an inorganic oxide thin film such as aluminum oxide or silicon oxide. This composite film can be obtained by heating and vaporizing a simple substance or a mixture of aluminum oxide or silicon oxide under vacuum and depositing on the surface of the film.

  The joint seal portion 12 is provided so as to protrude outward from the first film 111. Further, the palm seal portion 12 has a long shape and is provided substantially in parallel with one side (the upper side or the lower side in FIG. 2) of the package body 11. In other words, the joint seal portion 12 is provided so as to be substantially parallel to the bottom side of the package body 11 when the package body 11 is self-supported.

Moreover, the joint seal part 12 is formed so that it may be located above the contents 1 at the time of the heat processing of the contents 1, and when the internal pressure of the package 1 for heat processing rises by heat processing, it is easy to release the pressure. It is formed to have an openability.
The palm seal portion 12 is made of the same material as that of the package body 11.

  In the center of the joint seal portion 12, a steaming region 121 is formed that steams when the contents are heated and the internal pressure increases. By doing so, the heat treatment packaging body 10 is released so as not to burst even when the internal pressure rises.

The cut guide part 13 is provided in the outer surface side of the package body 11 as shown in FIGS. In other words, the cut guide portion 13 is provided on the outer surface side of the first film 111 and the second film 112.
The cut guide portion 13 has a long shape and is provided substantially in parallel with the palm seal portion 12.

The cut guide portion 13 is configured such that the tear strength in the width direction (vertical direction in FIG. 2) is higher than the tear strength of the package body 11.
In order to make the tear strength in the width direction higher than the tear strength of the package body 11, the cut guide portion 13 may be made of a material having a higher tear strength than the material constituting the package body 11.

  Moreover, in order to make the tear strength in the width direction higher than the tear strength of the package body 11, the cut guide portion 13 may be composed of, for example, a uniaxially stretched film stretched in the longitudinal direction. As the uniaxially stretched film, for example, uniaxially stretched polyethylene or uniaxially stretched polypropylene can be used.

Moreover, you may form the cut guide part 13 using the laminated body of base materials, such as the said uniaxially stretched film and a polyethylene terephthalate film, a nylon film, and a biaxially stretched polypropylene film. Thereby, a bag making operation can be facilitated.
The cut guide portion 13 can be formed, for example, by sticking each of the above films to the outer surface side on the first film 111 and the second film 112 with an adhesive or the like.
The width of the cut guide portion 13 (the width represented by X in FIG. 2) is preferably 0.5 to 50 mm, and more preferably 3 to 10 mm.

The tear region 14 is configured by a region sandwiched between the palm seal portion 12 and the cut guide portion 13 in the first film 111 and the second film 112 when the package body 11 is viewed in plan.
The width of the tear region 14 (the width represented by Y in FIG. 2) is preferably 0.1 to 20 mm, and more preferably 0.5 to 8 mm.

Opening notches 15 are provided at both ends in the longitudinal direction of the tear region 14.
The heat-treatment packaging body 10 can be opened by tearing from the opening cut portion 15.

  Since the package 10 for heat treatment having such a configuration has the cut guide portion 13, when the package body 11 is torn from the opening cut portion 15, it is torn beyond the cut guide portion 13. Is prevented. That is, it is prevented from being cut downward.

In addition, since the heat treatment package 10 has the palm seal portion 12 above the tear region 14, the tear direction is difficult to shift upward.
As a result, when the packaging body for heat treatment 10 tears the packaging body main body 11, the tearing direction can be accommodated in the tearing region.

  Such a heat treatment packaging 10 includes, for example, a rectangular rear film 31 and a rectangular lower film 32 having a bent portion 36 for forming the palm seal portion 12, as shown in FIG. A rectangular upper film 33 having a bent portion 37 for forming the joint seal portion 12, a rectangular bottom film 34 bent into a mountain shape, a long cut guide portion film 38a, and a long shape The cut guide portion film 38b is overlaid and the outer periphery is heat sealed. At this time, since the notch 35 is formed in the bottom film 34, the back film 31 and the lower film 32 can be integrated in the part.

  In the configuration of FIG. 3, the first film 111 and the palm seal portion 12 are formed by heat-sealing the bent portion 36 of the lower film 32 and the bent portion 37 of the upper film 33.

In addition, as shown in FIG. 4, it is preferable that the joint seal part 12 is heat-sealed in the area | region away from the bending location in the state which inserted the easy open tape (not shown) as needed. The heat-sealed region 39 is preferably separated from the bent part by 1 mm or more, for example.
The joint seal portion 12 may be easily opened when the internal pressure of the package body 11 is increased by heat treatment, but the heat seal strength in an atmosphere at 90 ° C. is preferably 1200 g / 15 mm or less, and 800 g / More preferably, it is 15 mm or less. The heat seal strength of the joint seal portion 12 in a 90 ° C. atmosphere may be 0 g / 15 mm, but is preferably 100 g / 15 mm or more. The heat seal strength is a value measured in an atmosphere of 90 ° C. in accordance with JIS Z0238 “Test method for sealed soft packaging bags”.

  The joint seal portion 12 may be a complete seal at room temperature or an easy open. 150-2000g / 15mm is preferable and, as for the heat seal intensity | strength in the normal temperature atmosphere of the joint seal part 12, 300-1500g / 15mm is more preferable. The heat seal strength in a normal temperature atmosphere is a value measured in a normal temperature (23 ° C., 65% RH) atmosphere in accordance with JIS Z0238 “Test method for sealed soft packaging bags”.

  As an embodiment in which the heat seal strength in a 90 ° C. atmosphere is 1200 g / 15 mm or less as a sealant at a normal temperature, polyolefin, for example, polyethylene having a melting point of 120 ° C. or less (preferably 110 ° C. or less) is used as the sealant of the joint seal portion 12. Alternatively, polypropylene having a melting point of 140 ° C. or lower (preferably 130 ° C. or lower) is used, and a sealant having a higher melting point of 10 ° C. or higher is used as the sealant in other portions. In addition, melting | fusing point is the value measured based on ASTM2117.

  In addition, although the said embodiment demonstrated the case where the cut guide part 13 was provided in both the 1st film 111 and the 2nd film 112, the cut guide part 13 is the 1st film 111 or 2nd. It may be provided only on one of the films 112.

  Moreover, although the said embodiment demonstrated as what has the incision part 15 for opening in the both ends of the longitudinal direction of the tear area | region 14, you may provide the incision part 15 for opening only in one edge part, and for opening The cut portion 15 may not be provided.

Moreover, although the said embodiment demonstrated the structure by which the cut guide part 13 was provided under the palm seal part 12, it is not limited to this, For example, as shown in FIG. Alternatively, the cut guide portion 13 may be provided.
As mentioned above, although preferred embodiment of this invention was described, this invention is not limited to this.

<Example>
A package 10 for heat treatment as shown in FIG. 1 (160 mm long × 140 mm wide) was produced. The structure of the package body 11 used is Ny / LLDPE, where Ny functions as a base material layer and LLDPE functions as a sealant layer.

The joint seal portion 12 was formed at a position 47.5 mm from the upper end of the package body 11.
The cut guide portion 13 was formed by sticking a uniaxially stretched polyethylene film having a width of 5 mm with an adhesive 15 mm below the palm seal portion 12. In addition, an olefin type easy open tape was inserted into the palm seal part 12 to form a steaming region 121.

<Comparative Example 1>
A package for heat treatment not provided with the cut guide portion 13 was prepared.

<Comparative Example 2>
A package for heat treatment in which the joint seal part 12 and the cut guide part 13 are not provided was prepared.

<Evaluation>
Twenty samples, each sealed with 100 ml of water added to the heat-treated packaging bodies of the examples and the comparative examples, were prepared and heated in a microwave oven at 500 W for 3 minutes. Then, it removed from the microwave oven and opened each sample by hand.
In addition, the notch was cut | disconnected with the cutter in the position of 55 mm from the upper end part of the package body of the one side edge part of a package body, and it opened from there.
The case where it was not cut upwards or downwards by 5 mm or more from the opening position was evaluated as ◯, and the number of samples that became ◯ out of 20 samples was measured.

  As can be seen from Table 1, the heat-treated package of the present invention can be torn in the direction aimed at the time of opening. On the other hand, the heat-treated package of the comparative example could not be torn in the direction aimed at the time of opening.

DESCRIPTION OF SYMBOLS 10 Heat processing packaging body 11 Packaging body main body 111 1st film 112 2nd film 113 3rd film 12 Joint seal part 121 Steaming area 13 Cut guide part 14 Ripping area 15 Uncut part 31 for opening Back film 32 Lower part Film 33 Top film 34 Bottom film 35 Notch portion 36 Bending portion 37 Bending portion 38a Cut guide portion film 38b Cut guide portion film 39 Heat sealed region

Claims (8)

A package for heating the contents,
A bag-like package body provided with a first film and a second film facing each other;
An elongated palm seal part provided so as to protrude outward from the first film, and provided substantially parallel to one side of the package body;
On the first film and / or the second film, a cut guide portion provided substantially parallel to the palm seal portion,
When the package body is viewed in plan, it has a tear region configured by a region sandwiched between the palm seal part and the cut guide part,
The package body can be opened by tearing from at least one end in the longitudinal direction of the tear region,
The said cut guide part is a package for heat processing provided with the function to prevent torn beyond the said cut guide part, when tearing the said package main body. The package body is configured to be self-supporting when the contents are stored;
The package for a heat treatment according to claim 1, wherein the cut guide part is positioned below the palm seal part in a self-standing state.   The package for heat treatment according to claim 1 or 2, wherein the tear strength in the width direction of the cut guide portion is higher than the tear strength of the package body.   The said cut guide part is a package for heat processing of any one of Claim 1 thru | or 3 comprised by the uniaxially stretched film extended | stretched in the longitudinal direction.   The said cut guide part is a package for heat processing of any one of Claim 1 thru | or 4 comprised by the material whose tear strength is higher than the material which comprises the said package body main body.   The package for heat treatment according to any one of claims 1 to 5, further comprising an incision for opening at least one of longitudinal ends of the tear region.   The package for heat treatment according to any one of claims 1 to 6, wherein the cut guide portion has a width of 0.5 to 50 mm. The package for a heat treatment according to any one of claims 1 to 7, wherein a width of the tear region is 0.1 to 20 mm.