JP2005041557A - Heating-treatment packaging body and packaging method of contents in heating-treatment packaging body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating-treatment packaging body with regard to a packaging body being filled with foods, etc., which makes for heating-treating by a microwave oven of contents such as food products, etc. as they are wrapped, and which prevents rupture of the packaging body due to heating and pressure rise inside, and deformation or breakage of the packaging body after relieving of pressure, and to provide a packaging method of contents in a heating-treatment packaging body. <P>SOLUTION: The heating-treatment packaging body A has a container body whose encasing body is filled with contents (b) inside, and a lid body stuck by heat seal to the whole of the upper surface of the flange of the container proper, thus providing airtight package enclosure on the container body. A belt-like heat seal S provided both on the whole periphery portion of the flange and on the lid body has a first protrusion(s) 15 provided at its inner end side on the upper surface of the flange, the first protrusion(s) being in continuation with the belt-like heat seal with its (their) tip portion(s) directed toward the encasing body side, at one location or at a plurality of locations, and a first air vent(s) 16 is (are) bored on the upper surface of the flange, penetrating through the flange in the direction of its thickness, located in the vicinity and outside of the first protrusion. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention is a packaging body filled with foods and the like, and the contents of foods can be cooked with a microwave oven while being packaged, and the packaging body can be prevented from rupture due to an internal heating rise pressure. The present invention relates to a heat treatment package that can prevent deformation and breakage of the package, and a method for packaging the contents in the heat treatment package.

  Traditionally, cooked or semi-cooked food is filled in a heat-resistant plastic packaging container, covered with a plastic film, and sealed with heat sealing at the container flange, just before eating In addition, many packaged foods that are cooked with a microwave oven are provided on the market.

  And when these packaged foods are heated by a microwave oven, the internal pressure rises due to the thermal expansion of the water vapor or the internal air inside the container, and finally the contents are scattered by the expansion of the container and lid, And since the inside of a microwave oven will be contaminated, the means to prevent the said fault are heightened in these packaged foods.

For example, it is known to provide steaming means for releasing a pressure by peeling off a part of the heat seal when the internal pressure rises above a certain level in the packaged food.
However, the heat seal portion in the container flange portion is joined with high hit seal strength in order to securely seal and package the contents without being easily peeled off during transportation or storage.
On the other hand, the steaming heat seal part is configured to be relatively easily peeled off against the internal pressure in the container generated at the time of cooking, and the conventional packaging body has a convex strip on the upper surface of the container flange. Or a concave body (see, for example, Patent Document 1).

JP 2001-315863 A

However, since this container forms a protrusion or a concave body on the flange portion, the container molding process becomes complicated and troublesome, and the manufacturing cost increases, and packaged foods can be provided at a low price on the market. It was difficult to do.
In particular, in the case where the flange has a narrow width in a container, it is difficult to form the above-described ridges or concaves, and this technique cannot be employed.

  The present invention has been made to solve the above-described problems. A container body in which a flange is provided around a peripheral portion and a concave container is provided on the inner peripheral portion of the flange, and the container is filled in the container. And a lid for heat-sealing the contents into the container main body and sealing the contents in the container main body with the heat seal. The band-shaped heat seal applied to the cover and the cover is formed on the flange upper surface on the inner end side of the band-shaped heat seal with a first protrusion whose front end portion faces the container side continuously with the band-shaped heat seal. Provided at one or a plurality of locations, in the vicinity of the first projection on the upper surface of the flange, by piercing the first ventilation hole located outside the first projection and penetrating through the thickness direction of the flange, etc. In the package to be filled In addition, the contents such as food can be cooked with a microwave oven while being packaged, and it is possible to prevent the package from rupturing due to the internal heating rise pressure, and to prevent deformation and breakage of the package after the release. An object of the present invention is to provide a heat-treatable packaging body and a method for packaging the contents in the heat-treatment packaging body.

The means of the present invention for achieving the above-mentioned object is as follows:
A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
The belt-shaped heat seal applied to the entire circumference of the flange and the lid body is continuous with the belt-shaped heat seal on the inner end side of the belt-shaped heat seal on the container side on the flange upper surface. A first protrusion whose tip is directed toward the container is provided at one or a plurality of locations,
A first vent hole is formed in the upper surface of the flange at a position close to the first protrusion and located outside the first protrusion toward the outer end of the flange and penetrating in the thickness direction of the flange. The structure of the heat treatment package.

A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
Provided on the upper surface of the flange in the entire circumference of the flange to which the heat seal is applied is provided a bulging band that bulges from the upper surface of the flange and continues through the entire circumference of the flange, and is located on the container side in the bulged band On the inner end side, the second protrusion whose tip is directed to the container side is provided at one or a plurality of locations continuously with the bulging band,
A second vent hole is formed in the upper surface of the flange, close to the second protrusion, located outside the second protrusion toward the outer end of the flange and penetrating in the thickness direction of the flange. The structure of the heat treatment package.

The flange of the container body with which the lid abuts is formed in a smooth shape without protrusions on the abutment surface,
The lid body is a plastic material having a high temperature dependency at least at a location to be heat-sealed with the upper surface of the flange. When the internal pressure rises, an opening for degassing is formed at the heat-sealed portion by the raised pressure, and an easy-open seal that releases the raised internal pressure,
The opening serves as an inlet for outside air into the heat treatment package after the release of pressure.

The top surface of the flange is at least heat-sealable with the lid, and is made of a highly temperature-dependent plastic material. When the pressure rises, an opening for degassing is formed at the heat-sealed portion by the rising pressure, and an easy-open seal that releases the raised internal pressure,
The opening serves as an inlet for outside air into the heat treatment package after the release of pressure.

  The easy-open seal has a peel force in a normal state of 3 kgf / 15 mm or more and a peel force when heated at 90 ° C. of 400 g / 15 mm or less.

The lid is at least heat sealed with the upper surface of the flange during the heat treatment of the contents, and when the internal pressure of the heat treatment package sealed by heating by the heating means increases, the increased pressure Is an easy peelable film in which an opening for deaeration is formed at the heat-sealed portion to release the increased internal pressure,
This easy peelable film has a normal peel strength of 1.8 kgf / 15 mm or less.

And
A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
The band-shaped heat seal applied to the entire circumference of the flange and the lid body is arranged on the inner end side of the band-shaped heat seal on the upper surface of the flange, and the leading end of the band-shaped heat seal is accommodated in the housing. The first projection facing the body side is provided at one place or multiple places,
A first air hole is formed in the upper surface of the flange in the vicinity of the first protrusion and located outside the first protrusion and penetrating the thickness direction of the flange.
At the time of the heat treatment of the contents, when the internal pressure of the package for heat treatment that is hermetically packaged by heating by the heating means is increased, the heat-sealed first protrusion is applied to the location of the first protrusion that is heat-sealed by the increased pressure. An opening for deaeration is formed to release the increased internal pressure, and to prevent the heat treatment package from bursting or scattering the contents,
After the relief pressure, the opening serves as an introduction port for the outside air into the heat treatment packaging body, and the pressure inside the heat treatment packaging body due to the relief pressure due to the outside air flowing from the first ventilation hole to the introduction opening. It is in the packaging method of the content in the package for heat processing which prevents the deformation | transformation and damage of the said container main body by fall.

A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
On the upper surface of the flange in the entire circumference of the flange to which the heat seal is applied, a bulging band that bulges from the upper surface of the flange and continues through the entire circumference of the flange is provided, on the inner end side of the bulging band, A second protrusion whose tip is directed to the container side continuously with the bulging belt is provided at one or a plurality of locations,
At the time of the heat treatment of the contents, when the internal pressure of the package for heat treatment that is hermetically packaged by heating by the heating means is increased, the heat-sealed portion of the second protrusion is heat-sealed by the increased pressure. An opening for deaeration is formed to release the increased internal pressure, and prevent the heat-treatment packaging from rupturing or scattering the contents,
After the relief pressure, the opening serves as an introduction port for the outside air into the heat treatment packaging body, and the pressure inside the heat treatment packaging body due to the relief pressure due to the outside air flowing from the second ventilation port to the introduction port. It is in the packaging method of the content in the package for heat processing which prevents the deformation | transformation and damage of the said container main body by fall.

The present invention configured as described above is capable of cooking the contents of food in a package filled with food, etc. while still being packaged with a microwave oven, and prevents rupture of the package due to internal heating and rising pressure. In addition, it is possible to prevent deformation and breakage of the container body due to a pressure drop in the heat treatment package due to the relief pressure.
In particular, the structure of the package is simple, and the contents-filled hermetic package has a unique effect such that the manufacturing cost is reduced and packaged foods can be provided on the market at a low price.

Next, a first embodiment of a heat treatment packaging body and a content packaging method in the heat treatment packaging body according to the present invention will be described with reference to the drawings.
1 to 2 and 4, A is a heat treatment packaging body, a container body 3 having a flange 1 around the periphery and a concave container 2 provided on the inner periphery of the flange 1, and the container body 3, the contents b filled in the container 2, and the lid 4 that sticks the entire upper surface of the flange 1 of the container body 3 by heat seal S and seals the contents b into the container body 3. Have
The package A for heat treatment is for heat treatment by a heating means such as a microwave oven at the time of use, and the lid 4 on the top of the flange 1 is opened to take out the contents b.
The food to be used is any article that can be eaten by heating with a heating means such as frozen food, chilled food, retort food, and the like.

And the above-mentioned container main body 3 is comprised from a polypropylene-type, polyethylene-type, polyester-type, polycarbonate-type, a polystyrene-type synthetic resin, or these blends. The shape of the container 2 is formed in a concave shape with a smooth bottom so that stable placement can be obtained. For example, as shown in FIG. As shown in the figure, the entire outer periphery of the peripheral portion of the upper portion of the container 2 is continuously provided with a flange 2 that protrudes substantially horizontally and has a predetermined width.
In addition, the above-mentioned taking-in / out part 5 is turned upward at the time of cooking by heating means, such as a microwave oven, and the content b does not spill out from the accommodating part 2 in this container main body 3. FIG.

Moreover, the flange 2 of the container main body 3 with which the lid 4 to be described later contacts is formed in a smooth shape having no protrusions on the contact surface 1a.
As shown in FIG. 1, the container body 3 is formed in the shape of the rectangular shape in which the insertion / removal portion 5 and the flange 2 are circular, or an elliptical shape or a rectangular shape (not shown) is used. In this case, the corners that form the corners are formed to have a relatively large arc shape.

Further, the lid 4 is attached to the entire upper surface of the flange 1 of the container body 3 by a heat seal S so that the contents b are sealed and packaged in the container body 3 and the contents b are heated. The action is performed.
And at least the place where the heat seal S is made on the upper surface of the flange 1 is made of a plastic material having high temperature dependence or a conventional easy-to-peelable film. When the internal pressure of the heat treatment package A hermetically packaged by heating by the heating means rises, a degassing opening 6 is formed at the location where the heat seal S is made by the increased pressure. The easy-open seal that releases the increased internal pressure.

The plastic material used for the lid 4 is a plastic film, and has a base material 10 and a sealant layer 11 on one side surface of the base material 10 as shown in FIG.
The base material 10 uses a plastic material having heat resistance against heating by a heating means such as a microwave oven, and is made of, for example, a biaxially stretched film made of polypropylene, polyamide, polyester, ethylene-vinyl alcohol copolymer or the like. , Vinylidene chloride-acrylic acid ester copolymer film, aluminum oxide-deposited biaxially stretched polyester film, polymetaxylylene adipamide-based polyamide stretched film (including coextruded laminated film with 6-nylon), etc. The material is selected.

The above-described sealant layer 11 is a plastic film having a high temperature dependency, for example, an unstretched polypropylene film type, and a co-extrusion multilayer type is preferable to a single layer.
Here, the temperature-dependent plastic material (plastic film) means that when the flange 1 and the lid 4 are heat-sealed, the peeling force in a normal state (under a normal temperature that is not heated) is 3 kgf / 15 mm. Having the above, the heat seal strength is, for example, about 5 to 50 KPa at the internal pressure strength, and thus exhibits reliable sealing and packaging properties of the contents during transportation and storage, etc. When the heating temperature at the time of cooking by the heating means reaches 80 ° C to 90 ° C, the easily openable seal portion is preferably softened easily by 90 ° C, and the peeling force when heated at 90 ° C is 400 g / 15 mm. It is a film having the following configuration, which weakens the heat-sealing strength between the flange 1 and the lid 4, so-called easy opening and the heat treatment packaging A Those having a property capable of performing steam. (However, peel strength is a value measured at a tensile speed of 300 mm / min according to Z0238, a test method for sealed packaging bags based on the Food Sanitation Law.)

  That is, when the internal pressure of the heat treatment package A that is hermetically packaged by heating by the heating means is increased during the heat treatment of the contents b in the heat treatment package A, the increased pressure causes FIG. As shown in FIG. 5A, an opening 6 for deaeration is formed at a location where the heat seal S is made, and the increased internal pressure is released to perform heat treatment caused by the expansion pressure. It is an easy-open seal that prevents contamination in the heating means (microwave oven) due to rupture of the package A or scattering of the contents b.

Further, when the plastic film in the plastic material used for the lid 4 is an easy peelable film (easy-open seal), for example, a biaxially stretched 6 nylon film, a biaxially stretched polyethylene terephthalate film, or a composite thereof An unstretched polypropylene film-based sealant film that is easy to wear is laminated on the innermost layer of the substrate made of a film.
The sealant film layer in the lid 4 and the flange 1 of the container body 3 are such that the contents b in the container body 3 are sealed by a belt-like heat seal S by a heat seal bar, and the heat seal strength is For example, the internal pressure strength is about 5 to 50 KPa.
The easy peelable film (easy-open seal) has a normal peel strength of 1.8 kgf / 15 mm or less, and a peel strength when heated at 90 ° C. is 400 to 1200 gf / 15 mm. In the normal state, while exhibiting a reliable sealing property of the contents b, for example, when heated by a microwave oven, the elevated internal pressure is released and the heat treatment package A caused by the expansion pressure is released. It is possible to prevent contamination in the microwave oven due to rupture or scattering of the contents b.

In the embodiment of the present invention, in particular, a belt-like heat seal having a predetermined width corresponding to the width direction of the flange 1 is applied to the entire circumference of the flange 1 in the container body 3 and the lid 4. As shown in FIG. 4, on the inner end side S <b> 1 located on the container 2 side of the belt-shaped heat seal S on the upper surface of the flange 1, the tip 15 a is continuous with the belt-shaped heat seal S. The first protrusions 15 facing the container 2 side are provided at one place or a plurality of places.
For example, the first protrusion 15 is formed in a substantially triangular shape, and the outer end side S2 of the belt-shaped heat seal S (the side opposite to the container 1 across the belt-shaped heat seal S) is similar. Although it is formed in a substantially triangular concave portion, the shape may not necessarily be the similar shape, or may be a shape in which the concave portion is not formed. In addition, the two inclined surfaces 15b and 15c that are divided on both sides from the distal end portion 15a are formed into a straight line, an arc-shaped curve, or a wave shape (including a jagged shape).

  Therefore, when internal pressure is generated in the heat treatment package A due to the heating of the heat treatment package A, the flange 1 and the lid 4 are peeled off from the tip of the first protrusion 15, and the first The peeling progresses toward the inside (outside) in the width direction of the heat seal S while the peeling gradually propagates along the two inclined surfaces 15b and 15c dividing from the front end portion 15a of the protrusion 15 to both sides. Finally, the opening 6 is formed so that the steam is passed and released.

Further, on the upper surface of the flange 1, the flange 1 near the first protrusion 15 (at a position close to the first protrusion 15) is connected to the outside of the flange 1 from the first protrusion 15 as shown in FIGS. 3 and 4. A first vent hole 16 is formed so as to penetrate the thickness direction of the flange 1 on the outer side toward the end portion, that is, on the other side of the distal end portion 15a of the first protrusion 15.
In the configuration of the first vent hole 16, it is provided on the outer end side S <b> 2 in the heat seal S, and as shown in FIG. 4B, the outer end of the belt-like heat seal S at the first protrusion 15. Although it is preferable to be provided so as to fit in a substantially triangular recess formed on the side S2, it is not necessarily limited to this form. The formation of the first vent hole 16 is performed by an appropriate means such as punching when the container body 3 is formed.
The shape of the first vent hole 16 may be a triangle, a quadrangle, a polygon, an ellipse, or a slit in addition to a circle.

  Further, the first vent hole 16 may be provided so as to be applied to the heat seal S portion as long as sufficient sealing strength can be obtained for the heat seal S provided in a belt shape.

  In the first vent hole 16, after the internal pressure in the heat treatment package A is released, the opening 6 described later serves as an inlet 60 for the outside air into the heat treatment package A. Outside air flows from the first vent hole 16 to the inlet 60.

More specifically, when the internal pressure is generated in the container body 3 in the heat treatment packaging body A as shown in FIG. As shown in FIG. 6 (b), the opening 15 forms an opening 6 and the internal pressure immediately escapes from the opening 6 to the outside air.
After this relief pressure, as shown in FIG. 6 (d), it becomes the inlet 60 for taking in the outside air into the heat treatment package A. The contents b of the heat treatment package A are If there is a little time before eating (if the steam is left as it is), or the water scattered during the steaming adheres to the flange 1 or the lid 4 corresponding to the flange 1 and peels off once The opening 6 is closed as shown in FIG.
Then, due to the pressure drop in the heat treatment package A caused by the relief pressure, or the volume expansion of the air in the heat treatment package A causes a volume shrinkage with cooling, and further, the inside of the container body 3 The inside of the container body 3 tends to become negative pressure by the air that has escaped from the air.
However, as shown in FIG. 6 (d), outside air immediately enters the opening 6 from the first vent hole 16 formed in advance in the opening 6 from the direction orthogonal to the upper surface of the flange 1, and this Since sufficient outside air flows into the container body 3 from the opening 6, that is, the introduction port 60, it is possible to prevent deformation and breakage of the container body 3, the lid body 4, and the like in the heat treatment packaging body A. Can do.
Therefore, the container main body 3 that does not cause this deformation is not only used as a packaging container, but also at the time of heat cooking and after heat cooking, the container main body 3 is used as a cooking container and is convenient without any inferiority as tableware. Can be used.

In addition, when a plastic material having high temperature dependency is used for the easy-open seal, if the peeling force when heated at 90 ° C. is 400 gf / 15 mm or more, stable automatic steaming is not performed. In addition to being blown up at an appropriate place in the heat treatment package A and damaging the package A or scattering the contents b, the contents b cannot be eaten. May contaminate the microwave oven.
Alternatively, since the internal pressure has become too high, the opening 6 generated by the relief pressure becomes a very small opening in a pinhole state as shown in FIG. In the negative pressure in the heat treatment package A caused by the deaeration to the outside, the opening 6 in the pinhole state, As shown in FIG. 7 (b), outside air cannot be introduced into the heat treatment package A. Therefore, the container main body 3 and the lid 4 are deformed or damaged by the negative pressure phenomenon or the like. Cause inconvenience.

  In the heat seal S between the flange 1 and the lid 4, the first protrusion 15 is formed in advance on a pressing die in the heat seal bar. It can be easily formed by providing a form corresponding to the shape of the first protrusion 15.

  FIG. 8A shows a second embodiment of the heat treatment packaging body according to the present invention. A container having a flange 1 around the periphery and a concave container 2 provided on the inner periphery of the flange 1. The main body 3, the content b filled in the container 2 of the container main body 3, and the entire upper surface of the flange 1 of the container main body 3 are adhered by heat seal S, and the content b is sealed in the container main body 1. A lid 4 for packaging, and a bulge that bulges from the upper surface of the flange 1 on the entire circumference of the flange 1 to which the heat seal S is applied, and continues the entire circumference of the flange 1. A second protrusion having an extended band 17 provided on the inner end side of the bulged band 17 located on the container 1 side, the leading end of which is continuous with the bulged band 17 and facing the container 2 side. 18 is provided at one place or a plurality of places, and second on the upper surface of the flange 1. A second vent hole that is located in the vicinity of the protuberance 18 (at a position close to the second protrusion 18) and outside the second protrusion 18 toward the outer end of the flange 1 and penetrates the thickness direction of the flange 1. 19 is a configuration of the heat-treatment packaging body A having 19 formed therein.

That is, in the first embodiment, the form of starting the peeling in the heat seal S between the flange 1 and the lid 4 is provided in the heat seal S itself, whereas in the present embodiment, The example provided in the flange 1 side is shown. In addition, the structure of the flange 1 and the container 2 in the container main body 3, the base material structure of the cover body 4, etc. are comprised similarly to what was shown in the said 1st Example.
Moreover, the 2nd ventilation port 19 can select the form similar to the 1st ventilation port 16 shown in the 1st Example.

  Note that the bulging band 17 provided on the flange 1 exhibits a rib effect for reinforcing the flange 1 and improves the heat sealability with the lid 4.

Therefore, in this second embodiment, when the internal pressure is generated in the container body 3 in the heat treatment packaging body A in the peeling of the flange 1 and the lid body 4 from the front end portion of the first protrusion 15. Separation between the flange 1 and the lid 4 occurs, and the separation gradually propagates along the two inclined surfaces 18b and 18c dividing from the front end portion 18a of the second protrusion 18 to both sides. The isolation progresses toward the inside (outside) in the width direction, and finally, the opening 6 is formed so as to pass through and release pressure.
That is, as shown in FIG. 10 (a), the first protrusion 15 performs the opening guidance and guiding action, and as shown in FIG. 10 (b), the opening 6 is formed, and the internal pressure is immediately reduced. The air escapes from the opening 6 to the outside air.
After this relief pressure, as shown in FIG. 10 (d), it becomes the introduction port 60 for taking in the outside air into the heat treatment package A, but the contents b of this heat treatment package A are changed. If there is a little time until eating (if the steam is left as it is), the opening 6 once peeled off closes as shown in FIG. 10 (c).
Then, due to the pressure drop in the heat treatment packaging body A caused by the relief pressure, that is, when the inside of the container body 3 tries to become a negative pressure by the air that has escaped from the inside of the container body 3, FIG. As shown, outside air enters the opening 6 from the second vent 19 formed in advance in the opening 6 in a direction perpendicular to the upper surface of the flange 1, and the outside air further flows into the opening 6, that is, the introduction port. Since sufficient outside air flows into the container main body 3 from 60, it is possible to prevent deformation and breakage of the container main body 3 and the lid in the heat treatment package A.
Therefore, the container body 3 is not only used as a packaging container, but can be conveniently used as a tableware without any inferiority as a container for cooking during and after cooking.

In addition, as shown in FIG. 11, the plastic material used as an easily openable seal | sticker may be provided in the flange 1 upper surface in the container main body 3, The location where the flange 1 upper surface, the cover body 4, and the heat seal S are made | formed is It is a plastic material or an easy-to-peelable film having a high temperature dependency, and this portion becomes a sealant layer.
As shown in FIG. 11, a base material 30 and a sealant layer 31 are provided on one side surface (upper surface side) of the base material 30 on the upper surface of the flange 1 in the container main body 3.

It is a perspective view which shows the package for heat processing of the 1st Example which concerns on this invention. It is a longitudinal front view which shows the package for heat processing in FIG. It is an expanded sectional view which shows the heat seal state in the flange part of the package for heat processing in FIG. It is a top view which fractures | ruptures and shows a part of cover body of the package for heat processing in FIG. 1, (a) shows the whole structure, (b) shows the state to which the R section in (a) was expanded, respectively. It is the top view which fractures | ruptures and shows a part of cover body of the package for heat processing in FIG. 1, and shows the state which passed. It is explanatory drawing which shows the operation state of the package for heat processing in FIG. 1, (a) is a heat seal state, (b) is the relief pressure state in a container main body, (c) is an opening part after a vaporization. (D) shows the ventilation | gas_flowing state in the container main body, respectively. FIG. 2 is an explanatory diagram in the case where a high peel strength material is used for the sealant layer in the heat treatment package in FIG. 1. It is a top view which fractures | ruptures and shows a part of cover body of the heat processing packaging body of 2nd Example which concerns on this invention, (a) is before the vaporization in the whole structure, (b) is after the vaporization. Each state is shown. FIG. 9 is a partially broken view of the lid of the heat treatment packaging body in FIG. 8, wherein (a) shows a perspective view and (b) shows a cross-sectional view. It is explanatory drawing which shows the action | operation state of the package for heat processing in FIG. 8, (a) is a heat seal state, (b) is the relief pressure state in a container main body, (c) is an opening part after steaming. (D) shows the ventilation | gas_flowing state in the container main body, respectively. It is sectional drawing of the principal part which shows the example which provided the sealant layer in the flange side in the package for heat processing of the Example which concerns on this invention.

Explanation of symbols

  1 Flange. 2 ... Container. 3 ... Container body. 4 ... Lid. 5 ... In / out section. 6 ... opening. A: Packaging for heat treatment. S ... Heat seal. b. Contents. 15 ... 1st protrusion. 16 ... 1st ventilation hole. 17 ... bulge band. 18 ... second protrusion. 19 ... Second vent hole. 60 ... Introduction port.

Claims (8)

A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
The belt-shaped heat seal applied to the entire circumference of the flange and the lid body is continuous with the belt-shaped heat seal on the inner end side of the belt-shaped heat seal on the container side on the flange upper surface. A first protrusion whose tip is directed toward the container is provided at one or a plurality of locations,
A first vent hole is formed in the upper surface of the flange at a position close to the first protrusion and located outside the first protrusion toward the outer end of the flange and penetrating in the thickness direction of the flange. A package for heat treatment characterized by the above. A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
Provided on the upper surface of the flange in the entire circumference of the flange to which the heat seal is applied is provided a bulging band that bulges from the upper surface of the flange and continues through the entire circumference of the flange, and is located on the container side in the bulged band On the inner end side, the second protrusion whose tip is directed to the container side is provided at one or a plurality of locations continuously with the bulging band,
A second vent hole is formed in the upper surface of the flange, close to the second protrusion, located outside the second protrusion toward the outer end of the flange and penetrating in the thickness direction of the flange. A package for heat treatment characterized by the above. The flange of the container body with which the lid abuts is formed in a smooth shape without protrusions on the abutment surface,
The lid body is a plastic material having a high temperature dependency at least at a location to be heat-sealed with the upper surface of the flange. When the internal pressure rises, an opening for degassing is formed at the heat-sealed portion by the raised pressure, and an easy-open seal that releases the raised internal pressure,
The package for heat treatment according to claim 1, wherein the opening serves as an inlet for outside air into the package for heat treatment after releasing the pressure. The top surface of the flange is at least heat-sealable with the lid, and is made of a highly temperature-dependent plastic material. When the pressure rises, an opening for degassing is formed at the heat-sealed portion by the rising pressure, and an easy-open seal that releases the raised internal pressure,
The package for heat treatment according to claim 2, wherein the opening serves as an inlet for outside air into the package for heat treatment after the release of pressure. The easy-opening seal has a peel strength in a normal state of 3 kgf / 15 mm or more, and a peel force when heated at 90 ° C. is 400 g / 15 mm or less. 5. body. The lid is at least heat sealed with the upper surface of the flange during the heat treatment of the contents, and when the internal pressure of the heat treatment package sealed by heating by the heating means increases, the increased pressure Is an easy peelable film in which an opening for deaeration is formed at the heat-sealed portion to release the increased internal pressure,
The package for heat treatment according to claim 1, wherein the easy peelable film has a peel strength in a normal state of 1.8 kgf / 15 mm or less. A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
The band-shaped heat seal applied to the entire circumference of the flange and the lid body is arranged on the inner end side of the band-shaped heat seal on the upper surface of the flange, and the leading end of the band-shaped heat seal is accommodated in the housing. The first projection facing the body side is provided at one place or multiple places,
A first air hole is formed in the upper surface of the flange in the vicinity of the first protrusion and located outside the first protrusion and penetrating the thickness direction of the flange.
At the time of the heat treatment of the contents, when the internal pressure of the package for heat treatment that is hermetically packaged by heating by the heating means is increased, the heat-sealed first protrusion is applied to the location of the first protrusion that is heat-sealed by the increased pressure. An opening for deaeration is formed to release the increased internal pressure, and to prevent the heat treatment package from bursting or scattering the contents,
After the relief pressure, the opening serves as an introduction port for the outside air into the heat treatment packaging body, and the pressure inside the heat treatment packaging body due to the relief pressure due to the outside air flowing from the first ventilation hole to the introduction opening. A method for packaging contents in a heat treatment packaging body, wherein the container body is prevented from being deformed or damaged due to lowering. A container body having a flange around the periphery and a concave container provided on the inner periphery of the flange, the contents filled into the container body, and the entire upper surface of the flange of the container body are attached by heat sealing. A package for heat treatment provided with a lid for hermetically packaging the contents into the container body,
On the upper surface of the flange in the entire circumference of the flange to which the heat seal is applied, a bulging band that bulges from the upper surface of the flange and continues through the entire circumference of the flange is provided, on the inner end side of the bulging band, A second protrusion whose tip is directed to the container side continuously with the bulging belt is provided at one or a plurality of locations,
At the time of the heat treatment of the contents, when the internal pressure of the package for heat treatment that is hermetically packaged by heating by the heating means is increased, the heat-sealed portion of the second protrusion is heat-sealed by the increased pressure. An opening for deaeration is formed to release the increased internal pressure, and prevent the heat-treatment packaging from rupturing or scattering the contents,
After the relief pressure, the opening serves as an introduction port for the outside air into the heat treatment packaging body, and the pressure inside the heat treatment packaging body due to the relief pressure due to the outside air flowing from the second ventilation port to the introduction port. A method for packaging contents in a heat treatment packaging body, wherein the container body is prevented from being deformed or damaged due to lowering.

Images