JP6552092B2 - Label, packaging material and package - Google Patents

Description

  The present invention relates to a package such as a packaging container or a packaging bag for packaging food or the like to be heat-treated using a microwave oven or the like, a packaging material such as a lid or a packaging film constituting the package, and the package It is related with the label stuck on the material.

  A lid is put on the container main body containing contents such as various foodstuffs and processed food to be able to heat and cook as it is with a microwave and sealed, or the content is made of a packaging film etc. Many foods sealed inside are sold.

  When this type of food is cooked as it is in a microwave oven, the internal pressure of the packaging container or packaging bag excessively increases due to water vapor generated from the contents, etc. For example, the film may be damaged and the contents may spill outside.

  For this reason, various techniques have been conventionally proposed in which a hole for steam removal is naturally formed on the lid or bag surface of the container during heating.

  For example, in Patent Document 1, a part of a heat seal portion of a packaging bag is peeled off by an increase in internal pressure accompanying generation of water vapor or the like when food is heated in a microwave oven, thereby opening a hole. There is disclosed a packaging bag in which water vapor and the like inside is discharged.

JP-A-10-101154

  However, in the conventional example in which the hole is opened by weakening the adhesive strength of a part of the heat seal portion as described above and being peeled by an increase in internal pressure, it is not easy to adjust to peel the hole appropriately and opening the hole, If the area of the peeling part is not appropriate and the hole is too small, the internal pressure will be excessive and the packaging bag will be damaged, or conversely, if the hole is too large, water vapor will be discharged more than necessary from the packaging bag and cooking will be possible. There is a problem that the texture becomes insufficient and the texture decreases.

  The present invention has been made in view of the above-described points, and provides a label that is easy to adjust to an appropriate internal pressure during heat treatment, and a packaging material and a package using the same. For the purpose.

  In order to achieve the above object, the present invention is configured as follows.

(1) The label of the present invention is a label that is attached to the packaging material so as to cover the vapor venting portion of the packaging material having a vapor venting portion through which steam generated by heating escapes, and the heat shrinkable film and the non-shrinkable film. A heat-shrinkable film is laminated, and the heat-shrinkable film is formed with a steam vent cut through the label along a direction intersecting the shrinkage direction due to the heating , and the packaging material The steam vent and the periphery thereof are concave, the heat shrinkable film has an area facing at least a part of the concave, and the non-heat shrinkable film is the heat shrinkable It is larger than a film and has an area that can be attached to the periphery by extending to the periphery of the recess and facing the recess.

  The label of the present invention is, for example, attached to a packaging material that constitutes a packaging container or packaging bag containing contents such as various foods and processed foods so as to cover the steam release portion. When a packaging container or packaging bag containing an object is heat-treated using a microwave oven or the like, the heat-shrinkable film constituting the label is shrunk by heat, and the direction is crossed with respect to the shrinking direction. Since the vapor removal cut formed through the label opens due to contraction, the water vapor and the like from the vapor release portion of the packaging material is discharged to the outside of the label through the open vapor removal cut. Can do.

  By setting the length, number, and arrangement of the steam venting cuts formed on the heat shrinkable film, or the material and size of the heat shrinkable film, the steam opened from the steam vent portion of the packaging material is opened. It is possible to adjust the amount of escape of water vapor or the like which escapes through the extraction slit, and hence it is possible to adjust the internal pressure and temperature of the packaging container and the packaging bag.

As a result, when the packaging container or packaging bag containing the contents is heat-treated using a microwave oven or the like, the internal pressure of the packaging container or packaging bag is prevented from excessively rising due to water vapor generated from the contents. In addition, it is possible to prevent the lid of the packaging container from being removed and the packaging bag from being damaged, while preventing excessive heat from being discharged from the packaging container and the packaging bag, resulting in insufficient heat treatment. can do.
Further, according to the present invention, the non-heat-shrinkable film is an area that covers the recess having the vapor vent and can be attached to the periphery of the recess, whereas the heat-shrink film is more expensive than the non-heat-shrinkable film. Since the adhesive film has a small area facing at least a part of the recess, the cost can be reduced accordingly.

  (2) In a preferred embodiment of the label of the present invention, the intersecting direction is a direction orthogonal to the shrinking direction, and the steam extraction cut is a linear cut.

According to this embodiment, the steam vent cut formed in the heat shrinkable film is
Since the heat-shrinkable film is linearly formed along a direction perpendicular to the shrinkage direction by heating, when the heat-shrinkable film shrinks by heating, By pulling along the contracting direction (opening direction) from both sides, the opening can be greatly opened, and water vapor from the steam vent can be sufficiently released to the outside of the label.

  (3) In one embodiment of the label of the present invention, the non-heat-shrinkable film is laminated with the heat-shrinkable film interposed therebetween.

  When the non-heat-shrinkable film is present only on one side of the heat-shrinkable film and the non-heat-shrinkable film is not present on the other side, undesired shrinkage deformation of the heat-shrinkable film due to heating is caused. The heat-shrinkable film may partially exfoliate from the non-heat-shrinkable film and wrinkles may occur as heating is advanced, but according to this embodiment, the heat-shrinkable film Since there is a non-heat-shrinkable film sandwiched from both sides, it is possible to restrict the heat-shrinkable film from undesirably shrinking and deforming even when heating is performed, thereby suppressing wrinkles. it can.

( 4 ) In another embodiment of the label of the present invention, in the region where the heat-shrinkable film of the non-heat-shrinkable film is not present, and in the region facing the concave portion, the steam venting is assisted. An auxiliary cut may be formed through the label.

  According to this embodiment, in the non-heat-shrinkable film, the area facing the recess of the packaging material is not opened, but an auxiliary cut through the label is formed. When heat-treating containers and packaging bags using a microwave oven, etc., until the opening for steam release formed on the heat-shrinkable film at the start of heating is sufficiently open due to heat shrinkage In addition, the water vapor and the like filled in the concave portions of the packaging material can be auxiliaryly discharged to the outside of the label through the auxiliary slits, and an excessive increase in the internal pressure of the packaging container or the packaging bag can be suppressed. In this case, since the heat-shrinkable film does not exist in the region where the auxiliary cut is formed, water vapor or the like can be efficiently released accordingly.

( 5 ) In another embodiment of the label of the present invention, a plurality of the steam vents are formed in a row at intervals along the intersecting direction.

  According to this embodiment, since the plurality of vapor removal cuts are formed in a row at intervals along the intersecting direction, the packaging container or packaging bag containing the contents is provided using a microwave oven or the like. When the heat treatment is performed, the plurality of steam removal cuts arranged in a row open in the intersecting direction, and water vapor and the like from the steam removal portion of the packaging material can be efficiently released.

( 6 ) In another embodiment of the label of the present invention , at least three rows of the plurality of vapor vents formed in the row shape may be formed.

  In the heat-shrinkable film, both ends in the shrinkage direction due to heating shrink inward. According to this embodiment, a plurality of vapor vents arranged in a line along the direction intersecting the shrinkage direction are arranged. Since at least three rows of serrations are formed, the two rows of steam venting slits near the both ends in the contraction direction can regulate the contraction of the both ends of the heat-shrinkable film inward, As a result, at least one row of steam venting gaps existing between the two rows of steam venting slits closer to both ends is sufficiently open without being affected by the inward contraction of the heat-shrinkable film. can do.

( 7 ) In a preferred embodiment of the label of the present invention, the heat-shrinkable film is integrated with a non-heat-shrinkable base film by an adhesive, and is bonded to the base film. The integrated heat-shrinkable film and the non-heat-shrinkable film are laminated via an adhesive layer.

  The heat-shrinkable film and the non-heat-shrinkable film are laminated via the pressure-sensitive adhesive layer, so when heat treatment is performed using a microwave oven or the like, the heat-shrinkable film does not shrink due to heat. Film may partially peel off from the heat-resistant film, but according to this embodiment, the heat-shrinkable film is integrated with the non-heat-shrinkable base film by the adhesive. Even if heating progresses, it does not peel from the base film, and as a result of unwanted deformation being restricted by the base film, it is possible to suppress wrinkles and the like.

( 8 ) The packaging material of this invention is equipped with the said steam release part covered with the label in any one of said (1) thru | or ( 7 ).

  According to the packaging material of the present invention, when a packaging container or packaging bag containing contents such as various foods or processed foods is constituted by the packaging material, the packaging container or packaging bag containing contents is microwave oven The heat-shrinkable film of the label that covers the vapor venting portion of the packaging material is shrunk by heat when heat-treated using, etc., and the vapor vent formed through the direction crossing the shrinkage direction Since the slits open, it is possible to discharge the water vapor and the like from the vapor-extracted portion of the packaging material to the outside of the label through the opened steam-extracting cuts.

  By appropriately setting the length, number, and arrangement of the steam extraction cuts formed in the heat shrinkable film, or the material and size of the heat shrinkable film, the steam release cuts opened from the steam release portion It is possible to adjust the escape amount of water vapor or the like that escapes through the inside, and thus it is possible to adjust the internal pressure and temperature of the packaging container and the packaging bag.

  Thus, when heat treatment is performed using a microwave oven or the like, the internal pressure of the packaging container or the packaging bag is prevented from excessively rising due to water vapor or the like generated from the contents, and the lid of the packaging container is removed. While it is possible to prevent the bag from being damaged, it is possible to prevent the heat treatment from being insufficient due to excessive discharge of water vapor or the like from the packaging container or the packaging bag.

( 9 ) In another embodiment of the packaging material of the present invention, a lid that closes the opening of the container body that houses the contents is formed.

  According to this embodiment, when the packaging container is heat-treated using a microwave oven or the like, the internal pressure of the packaging container is prevented from being excessively increased by the water vapor and the like generated from the contents and the like. While it is possible to prevent the lid from coming off from the main body, it is possible to prevent water vapor and the like from being discharged from the packaging container more than necessary, resulting in insufficient heat treatment.

( 10 ) The package of the present invention includes the packaging material according to ( 9 ) above and the container main body that houses the contents.

  According to the packaging body of the present invention, when the packaging container which is the packaging body is heat-treated using a microwave oven or the like, the internal pressure of the packaging container is prevented from excessively rising due to water vapor and the like generated from contents and the like. In addition, the lid that is the packaging material can be prevented from coming off from the container body, while water vapor or the like can be prevented from being unnecessarily discharged from the packaging container so that the heat treatment becomes insufficient. .

  When heat treatment is performed on a packaging container or a packaging bag constituted by a packaging material covered with a vapor-extracted portion by the label of the present invention using a microwave oven or the like, the heat-shrinkable film constituting the label shrinks due to heat. And the steam venting cut formed in the direction crossing the shrinking direction opens due to shrinkage, so the steam from the steam venting portion of the packaging material Can be discharged out of the label.

  By appropriately setting the length, number, and arrangement of the steam venting cuts formed in the heat shrinkable film, or the material and size of the heat shrinkable film, the steam venting incision opened from the steam venting portion It is possible to adjust the escape amount of water vapor or the like that escapes through the inside, and thus it is possible to adjust the internal pressure and temperature of the packaging container and the packaging bag.

  In this way, when the packaging container or packaging bag containing the contents is subjected to heat treatment using a microwave oven or the like, the internal pressure of the packaging container or packaging bag is prevented from excessively rising due to water vapor or the like generated from the contents. As a result, the lid of the packaging container can be prevented from coming off and the packaging bag can be prevented from being damaged, while the water vapor and the like are discharged more than necessary from the packaging container and the packaging bag to prevent the heat treatment from becoming insufficient. can do.

FIG. 1 is a plan view of a packaging container according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the packaging container of FIG. FIG. 3 is a plan view of the label of FIG. FIG. 4 is a cross-sectional view taken along the line A-A of FIG. FIG. 5 is a plan view corresponding to FIG. 3 after the heat treatment. FIG. 6 is a plan view corresponding to FIG. 1 of the banded packaging container. FIG. 7 is a cross-sectional view corresponding to FIG. 4 of another embodiment of the present invention. FIG. 8 is a cross-sectional view corresponding to FIG. 4 of still another embodiment of the present invention. FIG. 9 is a plan view corresponding to FIG. 3 of another embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a plan view of a packaging container 1 as a packaging body according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

  A packaging container 1 according to this embodiment includes a container body 2 in which contents (not shown) such as cooked food in a microwave oven are accommodated, and a packaging that closes the upper opening 2a of the container body 2 by fitting the outer periphery of the container body 2. A lid 3 as a material and a transparent label 4 covering a recessed portion 3a formed in the center of the lid 3 are provided.

  The recess 3a of the lid 3 is rectangular in a plan view, and the recess 3a is a steam removal consisting of a substantially U-shaped penetrating incision through which water vapor or the like generated from the contents escapes during cooking with a microwave oven Part 5 is formed.

  The steam vent 5 is deformed along the incision due to the rise of the internal pressure when cooking with a microwave oven or the like to release water vapor and the like to the recess 3a, and is limited to the above-mentioned approximately U-shaped transverse direction Instead, it may be V-shaped, C-shaped, X-shaped, or other shapes, and may be a half cut that breaks due to an increase in internal pressure of the through-hole or the packaging container 1.

  In this embodiment, the container main body 2 and the lid body 3 are made of a synthetic resin such as polypropylene and have a circular shape in plan view.

  FIG. 3 is a plan view of the label 4 covering the recess 3a in which the vapor vent 5 is formed, and FIG. 4 is a cross-sectional view taken along the line AA in FIG.

  The label 4 of this embodiment is attached to the non-heat-shrinkable film 7 having the first pressure-sensitive adhesive layer 6 formed on the back surface, and the non-heat-shrinkable film 7 via the second pressure-sensitive adhesive layer 8 and It is a laminated film with the heat shrinkable film 9 which is a shrink film which shrinks and deforms when heated.

  By laminating the heat-shrinkable film 9 which shrinks and deforms due to heating and the non-heat-shrinkable film 7, it is possible to control the deformation due to the heat shrinkage of the heat-shrinkable film 9. However, it is possible to suppress the occurrence of wrinkles and the like due to undesired deformation.

  The heat-shrinkable film 9 is, for example, a uniaxially stretched polystyrene film (PS), and shrinks along the shrinkage direction (left-right direction in the figure) indicated by the arrow B in FIG. 3 by heating. The heat-shrinkable film 9 has a rectangular shape, and a short side extends along the shrinking direction B, and a long side extends along a direction orthogonal to the shrinking direction B.

  This heat-shrinkable film 9 is not limited to the uniaxially stretched polystyrene film, but other heat-shrinkable films, for example, heat-shrinkable PET film, heat-shrinkable PE (polyethylene) film, heat-shrinkable PP (polypropylene) film Heat-shrinkable PVC (polyvinyl chloride) film or a hybrid heat-shrinkable film which is a laminated system of PS (polystyrene) and PET (polyethylene terephthalate), etc. can be used. A stretched heat-shrinkable film may be used.

  The non-heat-shrinkable film 7 under the heat-shrinkable film 9 has a substantially square shape whose one side is equal to the long side of the heat-shrinkable film 9 and has an area larger than that of the heat-shrinkable film 9. Extends to the periphery of the recess 3a of the lid 3 shown in FIG.

  The label 4 is attached to the lid 3 so as to cover the recess 3a with the first pressure-sensitive adhesive layer 6 under the non-heat-shrinkable film 7.

  The heat-shrinkable film 9 is laminated so as to extend from the center of one side of the two opposite sides of the non-heat-shrinkable film 7 to the center of the other side. The rectangular center of the heat-shrinkable film 9 substantially coincides with the center of the concave portion 3a of the lid 3.

  The heat-shrinkable film 9 is preferably arranged so as to face the steam-releasing part 5 depending on the shape and position of the steam-releasing part 5, and the heat-shrinkable film 9 is non-heat-shrinkable with the rectangular center. In some cases, the center of the square of the sexing film 7 does not match.

  The non-heat-shrinkable film 7 is not shrunk by heating like the heat-shrinkable film 9, but is made of a resin film, for example, a PET (polyethylene terephthalate) film. The non-heat-shrinkable film 7 is not limited to a PET film, and other resin films such as an OPP (biaxially stretched polypropylene) film and a PE film can be used.

  The heat-shrinkable film 9 and the non-heat-shrinkable film 7 are not limited to the above shapes, and may have a circular shape, a triangular shape, or other shapes depending on the shapes of the steam vent 5 and the recess 3a.

  In the label 4 of this embodiment, as shown in FIGS. 3 and 4, the heat-shrinkable film 9 has a plurality of vapor vents serving as discharge paths for releasing water vapor generated from the contents of the container body 2 during heating. The slit 10 is formed to penetrate the label 4 and when heated, the contraction of the heat shrinkable film 9 causes the vapor-extracting slit 10 to open as will be described later, and the main discharge path of water vapor etc. Form.

  The vapor removal cut 10 is a thin linear cutting line (slit), and the opening is extremely small before the heat shrinkable film 9 is thermally shrunk to open the cut.

  In the region where the heat-shrinkable film 9 of the non-heat-shrinkable film 7 is not present and in the region facing the recess 3a of the lid 3, water vapor generated from the contents of the container body 2 during heating is released. A plurality of auxiliary cuts 11, which serve as auxiliary discharge paths, are formed through the label 4.

  This auxiliary cut line 11 is also a thin straight cutting line (slit) similar to the vapor cut line 10, and its opening is extremely small. The auxiliary cut 11 is a discharge path until the steam-extracting cut 10 of the heat shrinkable film 9, which is a main discharge path for releasing water vapor and the like generated from the contents of the container body 2 when heated, opens due to heat contraction. It is effective as Although this auxiliary cut 11 does not open, it is formed in a region where the heat-shrinkable film 9 does not exist, and therefore it is easy to release water vapor and the like because the heat-shrinkable film 9 does not exist.

  The plurality of steam vents 10 are formed in a row at intervals along a direction (vertical direction in FIG. 3) intersecting at right angles to the shrinkage direction B due to heating of the heat-shrinkable film 9. A plurality of lines, four lines in this example, are formed along the contraction direction B.

  The steam release cuts 10 are formed in substantially the same length, and the steam release cuts 10 in each row are formed in a staggered pattern.

  A plurality of auxiliary cuts 11 are formed in regions facing the recesses 3a of the lid 3 on both sides of the heat-shrinkable film 9 along the direction intersecting at right angles to the shrinkage direction B, similarly to the cut lines 10 for releasing steam. Are formed in rows at intervals.

  When the packaging container 1 configured as described above is cooked using a microwave oven or the like, the heat-shrinkable film 9 tends to shrink along the shrinkage direction B by heating. At this time, the straight lines for vapor removal cuts 10 formed in the heat-shrinkable film 9 are pulled from both sides along the shrinking direction (opening direction) B, and the second pressure-sensitive adhesive layer 8 Along with the non-heat-shrinkable film 7 attached to the shrinkable film 9, each steam release cut 10 opens widely as shown in FIG. 5, and the label 4 has a large shape with open eyes. A through hole is formed.

  Therefore, in response to an increase in internal pressure due to water vapor or the like generated from the contents of the container body 2, the steam vent 5 formed in the recess 3a of the lid 3 is deformed and opened along the cut, and the steam vent 5 The steam or the like is discharged out of the label 4 from the steam release cut 10 opened through the recess 3a, and a part of the water vapor is discharged out of the label 4 from the auxiliary cut 11 through the recess 3a.

  Thereby, it is possible to prevent the internal pressure in the packaging container 1 from rising excessively and to prevent the lid 3 from being detached from the container body 2.

  When the heat-shrinkable film 9 is shrunk by heat, the ends on both sides in the shrinking direction B are shrunk inward, so as shown in FIG. Among them, the two rows of steam release cuts 10a on both sides in the shrinking direction B are affected by the shrinkage of the heat-shrinkable film 9 inward, and the opening is small. The inner two rows of steam release cuts 10b sandwiched between the cut cuts 10a are hardly affected by the inward shrinkage of the heat-shrinkable film 9, so that the opening is increased.

  The water vapor discharged from the packaging container 1 to the outside of the label 4 is the shape and size of the label 4, in particular, the number, length, arrangement, or heat shrinkage of the steam release cuts 10 formed in the heat shrinkable film 9. It can adjust by selecting the material etc. of the film 9 suitably.

  As a result, it is possible to prevent excessive discharge of water vapor or the like in the packaging container 1 while preventing the internal pressure in the packaging container 1 from rising excessively. The contents can be steamed, and proper cooking can be performed.

  According to this embodiment, the heat-shrinkable film 9 is shrunk by heating to open the steam release cut 10 and form a discharge path for water vapor or the like. For example, the heat-shrinkable film is rounded by heat. Compared to the configuration in which the discharge path is formed by contraction and deformation, it is possible to discharge water vapor or the like without opening a space for rounding and quickly opening the internal pressure rapidly.

  Therefore, as shown in FIG. 6, when the band seal 13 is wound around the packaging container 1 and a space in which the heat-shrinkable film is rounded cannot be secured between the band seal 13 and the label 4 below the band seal 13, It is difficult to form a discharge path by curling the shrinkable film, and water vapor or the like may not be sufficiently released.

  Since the band seal 13 is in close contact with the peripheral portions of both ends more than the central portion of the lid 3 of the packaging container 1, for example, the lid 3 may be a sachet of delicacy other than the recess 3 a having the vapor vent 5. In the case where the storage concave portions to be stored are formed side by side along the winding direction of the band seal 13, the concave portion 3a having the steam vent portion 5 cannot be disposed at the center portion of the lid body 3, and the lid It will be arrange | positioned near the peripheral part of the body 3, and it will become still more difficult to ensure sufficient space between the band seal 13 and the label 4 which covers the recessed part 3a.

  On the other hand, in the present embodiment, the steam vent cut 10 formed in the heat-shrinkable film 9 is simply opened by shrinkage due to heat of the heat-shrinkable film 9, thereby forming a discharge path for water vapor and the like. Even if there is a banding 13, there is no hindrance, and there is only a slight gap between the heat-shrinkable film 9 and the banding 13 from which water vapor and the like escape, so that the banding 13 prevents In addition, water vapor and the like can be released.

  In addition, the steam removal cut 10 is a thin linear cut, and the heat shrinkable film 9 is thermally shrunk to open it, the opening is extremely small, and the auxiliary cut which does not open is also a thin linear cut And since the opening is very small, until it heat-processes, the recessed part 3a of the cover 3 of the packaging container 1 can be substantially sealed. Furthermore, the sealing property of the concave portion 3 a of the lid 3 can be enhanced by winding the band seal 13.

  Although the heat shrinkable film 9 is provided on the upper surface side of the non-heat shrinkable film 7 in the above embodiment, the heat shrinkable film 9 is provided on the lower surface side of the non-heat shrinkable film 7, that is, the recess 3a side. May be.

  In the above embodiment, only one surface of the heat-shrinkable film 9 is attached to the non-heat-shrinkable film 7 that does not shrink by heating. For this reason, the heat-shrinkable film 9 can not be sufficiently restricted from the undesirable shrinkage deformation due to heat, and when the heating proceeds and the heating is finished, the heat-shrinkable film 9 does not shrink under heat. The film 7 may be partially peeled off to cause wrinkles.

Therefore, as another embodiment of the present invention, as shown in FIG. 7, the heat-shrinkable film 9 may be laminated so as to be sandwiched between the first and second non-heat-shrinkable films 7 ₁ and 7 _2. .

In this label 4 ₁ , a heat-shrinkable film 9 having a second pressure-sensitive adhesive layer 8 is laminated on a first non-heat-shrinkable film 7 ₁ having a first pressure-sensitive adhesive layer 6. a second non-heat-shrinkable film 7 ₂ is formed by laminating with a third adhesive layer 6 _2.

In the region of the heat-shrinkable film 9 of the label 4 _1, steam vent cuts 10 penetrating the label 4 ₁ are formed, first, second non-heat-shrinkable film 7 _1, 7 ₂ of the heat-shrinkable film 9 a region but does not exist, the area facing the recess 3a of the lid 3, an auxiliary cut 11 extending through the label 4 ₁ are formed.

Similar to the label 4 ₁ also label 4 of the embodiment of this embodiment, the packaging container 1, when cooked by microwave, by heating, the heat-shrinkable film 9 is contracted, is formed on the heat-shrinkable film 9 The steam release cut 10 opens to form a discharge path for water vapor and the like.

Furthermore, in this embodiment, since both surfaces of the heat-shrinkable film 9 are adhered to the first and second non-heat-shrinkable films 7 ₁ and 7 ₂ that do not shrink by heating, the heating proceeds and the heating is finished. Even at this point, the heat-shrinkable film 9 can be prevented from peeling off from both the non-heat-shrinkable films 7 ₁ and 7 _2, and the appearance after heating is also improved.

In the embodiments described above, heat-shrinkable film 9, through an adhesive layer 8, 12 non-heat-shrinkable films 7,7 _1, 7 ₂ but is adhered to, as another embodiment of the present invention, For example, as shown in FIG. 8, the heat-shrinkable film 9 is bonded and integrated with a base film 15 that is a non-heat-shrinkable film with an adhesive 14, and the base film 15 is integrated. the film 9, and a non-heat-shrinkable film 7 was laminated via an adhesive layer 8, it may constitute a label 4 _2.

  The base film 15 is non-heat shrinkable, and the same film as the non-heat shrinkable film 7 can be used.

  Thus, the heat-shrinkable film 9 shrinks with the progress of heating by bonding and integrating the non-heat-shrinkable base film 15 to the heat-shrinkable film 9 with the adhesive 14. Also, it is possible to perform opening of the steam extraction cut 10 more reliably while suppressing peeling from the base film 15 and effectively suppressing the occurrence of wrinkles in the heat-shrinkable film 9.

As in the embodiment of FIG. 7, the first and second non-heat-shrinkable films 7 ₁ and 7 ₂ are laminated so as to sandwich the heat-shrinkable film 9 in which the base film 15 is integrated. You may

  Either of the base film 15 and the heat shrinkable film 9 may be the upper layer or the lower layer.

  In each of the above embodiments, the vapor extraction cut 10 is formed along the direction orthogonal to the contraction direction B of the heat-shrinkable film 9 due to the heating, but the intersecting direction is not limited to the right. The vapor removal cuts 10 may cross diagonally as long as they can be opened by heating.

  In each of the above-described embodiments, the steam vent 10 is formed in a straight line, but is not limited to a straight line, and may be a bent shape or a curved shape as long as the steam vent can be opened by heating. Good.

  In each of the above embodiments, the auxiliary cut 11 is formed in the non-heat-shrinkable film 7, but this auxiliary cut 11 is not related to the heat shrink direction, and may be formed in any direction. For example, FIG. As shown in FIG. 3, the vapor vent cut 10 may be formed along the direction perpendicular to the direction of formation of the cut line 10, that is, along the heat shrinkage direction B. Further, the auxiliary cut 11 may be omitted.

  In each of the above embodiments, the upper opening 2a of the container main body 2 is closed by fitting the thin plate-like lid 3 in place, but as another embodiment, the lid 3 is replaced by a film-like packaging film. You can close it. In this case, the label 4 may be attached so as to cover the vapor venting portion formed in the packaging film.

  Moreover, you may apply not only to a packaging container but to the packaging bag which overlap | superposed the packaging film and heat-sealed the peripheral part.

DESCRIPTION OF SYMBOLS 1 Packaging container 2 Container body 3 Lid 3a Recessed part 4, 4 ₁ , 4 ₂ Label 5 Vapor release part 7, 7 ₁ , 7 ₂ Non-heat-shrinkable film 9 Heat-shrinkable film 10 Vapor vent cut 11 Auxiliary cut 13 Band seal 15 Base film

Claims (10)

A label adhered to the packaging material so as to cover the steam vent portion of the packaging material having a steam vent portion from which steam generated by heating escapes,
A heat-shrinkable film and a non-heat-shrinkable film are laminated,
In the heat-shrinkable film, a steam vent cut through the label is formed along a direction intersecting the shrinkage direction by the heating ,
The packaging material has a concave portion around the steam vent and its periphery,
The heat-shrinkable film has an area facing at least a part of the recess,
The non-heat-shrinkable film is larger than the heat-shrinkable film and has an area that can be attached to the peripheral part by extending to the peripheral part of the concave part while facing the concave part.
Label that is characterized by The intersecting direction is a direction intersecting at right angles to the contraction direction;
The steam release cut is a straight cut,
A label according to claim 1.   The label according to claim 1 or 2, wherein the non-heat-shrinkable film is laminated with the heat-shrinkable film interposed therebetween. In the region where the heat-shrinkable film of the non-heat-shrinkable film is not present, and in the region facing the recess, an auxiliary cut that assists in venting is formed through the label.
The label according to claim 1. A plurality of the steam vents are formed in a row at intervals along the intersecting direction.
The label according to any one of claims 1 to 4 . The plurality of steam vents formed in the rows are formed in at least three rows,
A label according to claim 5 . The heat-shrinkable film is integrated with a non-heat-shrinkable base film by bonding with an adhesive,
The heat-shrinkable film and the non-heat-shrinkable film that are bonded and integrated with the base film are laminated via an adhesive layer.
The label according to claim 1 . The vapor vent covered by the label according to any of the preceding claims.
A packaging material characterized by that. Configuring a lid that closes the opening of the container body that contains the contents;
The packaging material according to claim 8 The packaging material according to claim 9, and the container body for containing contents.
A package characterized by that.

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