JP4464673B2 - Hot water lid cover for instant food and method for producing the same - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an instant food hot water lid used for an instant food package such as instant yakisoba, which is eaten after pouring after pouring, and a method for manufacturing the same.

  Conventionally, as a hot water lid for instant foods, there is known a material having a structure in which a base material in which a hot water cut hole is perforated in a region offset to one edge and a surface material covering the base material are laminated. (Japanese Utility Model Publication No. 57-55175 (Patent Document 1), Japanese Utility Model Publication No. 60-9171 (Patent Document 2)).

  In the conventional hot-water food lid member for instant food as described in these, the peripheral portion on the base material side is attached to the peripheral portion of the opening of the container. When eating instant food, first peel off a part of the lid from the opening tab provided on the side opposite to the side where the hot water cut hole is formed, pour hot water into the container, and fold the opening tab to fold the container. Close the container once by hooking it on the flange. Then, after a certain period of time, this time, the peeling tab provided on the side of the hot water cut hole is picked to peel off one edge of the surface material covering the hot water cut hole of the base material from the base material to expose the hot water cut hole. By discharging the hot water in the container, instant food can be eaten.

Japanese Utility Model Publication No.57-55175 Japanese Utility Model Publication No. 60-9171

  Conventionally, when manufacturing such an instant food hot water lid member, the base material and the surface material have been laminated using a dry lamination method, an extrusion lamination method, a wet lamination method, or the like. However, in these methods, since an adhesive is used for adhesion between the base material and the surface material, uneven application of the adhesive is likely to occur, and the adhesive strength between the base material and the surface material varies, so that The surface material was not peeled off reliably, and there were problems such as the hot water cut hole not appearing reliably.

  The present invention has been made in view of the above problems, and provides a hot water lid member for instant food that improves the uniformity of the property of the adhesive surface between the base material and the surface material, and can reliably expose the hot water hole. The purpose is to provide.

The first invention for solving the above-described problems is
In the method for producing a hot water lid for instant food, which has a configuration in which a base material in which a hot water cut hole is drilled in a region offset to one edge and a surface material covering the base material is laminated,
At least one of the base material and the surface material is produced in a laminated structure in which an aggregation release layer is provided on the surface,
After adhering the surface material and the base material by a heat laminating method through the aggregation release layer ,
The hot-cut hole-shaped half-cut is formed from the base-material side at the hot-cut hole forming position of the base material, and a drilling process is performed to remove the remaining portion inside the half-cut .

The second invention for solving the above-mentioned problem is
At least in the instant food hot water lid member having a configuration in which a base material in which a hot water cut hole is perforated in a region offset to one edge and a surface material covering the base material are laminated,
A front Kimotozai and said surface material, through the agglutination peeling layer are bonded by heat lamination method, moreover the melt cutting holes, after bonding of the surface material and the base material, the hot water of the base material A hot cut hole-shaped half cut is formed from the base material side at the cut hole forming position, and the hole is formed by drilling to remove the remaining portion inside the half cut .

Further, the present invention provides the above-mentioned second invention,
As a preferred embodiment, the surface material is a laminated material having a metal foil layer.

  According to the present invention, since no adhesive is used for bonding between the base material and the surface material, high uniformity of the adhesive surface between them can be secured, and the base material and the surface material can be reliably peeled off. Thus, it is possible to make the hot water cut-out hole appear reliably.

  First, an instant food package using the instant food hot water lid of the present invention will be described with reference to FIGS.

  FIG. 1 is a plan view showing one embodiment of an instant food package using the hot water lid for instant food of the present invention, FIG. 2 is a schematic cross-sectional view along AA in FIG. 1, and FIG. 3 is BB in FIG. It is a schematic sectional drawing.

  As shown in FIGS. 1 to 3, the hot water lid material 1 is formed by laminating a base material 2 and a surface material 3, and heat-sealing the peripheral edge on the base 2 side to the peripheral edge of the opening of the container 4. The container 4 containing instant food (not shown) is sealed.

  One edge of the hot water lid 1 extends outward from the container 4, and constitutes an opening tab 5 for peeling the hot water lid 1 from the container 4. Further, a hot water cutting hole 6 is formed in a region offset from the edge on the side opposite to the opening tab 5. In the form shown in these drawings, the hot water cutting hole 6 is formed by penetrating through the base material 2 and covered with the surface material 3 laminated on the base material 2.

  On the other hand, a separation line 7 such as a perforation and an intermittent slit is formed between one edge of the surface material 3 covering the hot water cutting hole 6 of the base material 2 and the other part of the surface material 3. ing. Moreover, the edge part of the surface material 3 by the side of the hot water cutting hole 6 adjacent to this separation line 7 is extended outward, and the tab 8 for peeling is formed. However, if the tab 8 for peeling is provided as a clue for peeling the surface material 3, it can also be provided without extending like FIG. The hot water lid 1 is pulled by holding the peeling tab 8 so that one edge of the surface material 3 covering the hot water hole 6 of the substrate 2 is separated from the other parts of the surface material 3 to the line 7. The hot water hole 6 provided in the base material 2 can be exposed by peeling along the base material 2 while being separated along the surface.

  Next, an embodiment of a method for manufacturing a hot water lid for instant food according to the present invention will be described. FIG. 4 is a process diagram for explaining a method for producing a hot water lid for instant food according to the present invention.

Process 1
First, as shown in FIG. 4 (a), the surface material 3 is produced by a laminated structure of the aggregation peeling layer 14 and the surface base material layer 15.

  The material of the cohesive release layer is made of non-PP, PE, PS, etc. using the property that different types of resins such as polypropylene (PP) and polyethylene (PE), polystyrene (PS) and polyethylene (PE) cannot be heat sealed. A compatible (or partially compatible) resin is generally blended, and it has excellent peel temperature seal temperature stability, interstitial material sealability, and content resistance. However, the cohesive peel type sealant is difficult to generate stringing at the time of opening and the peel strength itself is difficult to adjust. Destroyed. For this improvement, it is necessary to consider the selection of the seal layer blend resin, the blend ratio, and the blend state (the blend resin is dispersed in an elliptical shape, a layer shape, or a linear shape with respect to the base resin). In order to prevent the yarn drawing behavior, it is desirable that the blend resin has a sea-island structure in which the blend resin is dispersed as much as possible in a lump (1 μm or more).

  There are many examples in which LDPE is used as the base resin and polybutene-1 is used as the blend material, and the production method is generally a co-extruded film (multiple layers) or extrusion lamination to a substrate. In addition to easy peel properties, tamper evidence can be imparted by whitening.

  As a condition of the cohesive release film suitable for the hot water lid material, the peel strength is 1 to 10 N / 15 mm width, more preferably 5 to 7 N / 15 mm width (easy peel), and the peel strength is stable even in the heat laminating temperature range. And heat sealability with PP and PE is good.

  Specifically, for example, an agglomerated release film as shown in Table 1 below can be used.

  The surface base material layer 15 may have a single layer or a laminated structure. In the case of a single layer, for example, polyethylene terephthalate (PET) or the like can be used. When it has a laminated structure, a metal foil layer is used as shown in the embodiment of a hot water lid for instant food described later. Or a laminated structure including a barrier layer such as a metal vapor deposition layer. Further, the surface base material layer 15 is subjected to printing as necessary before this step 1. A dry lamination method can be used for laminating the cohesive release layer 14 and the surface base material layer 15.

Process 2
Then, as shown in FIG. 4B, the base material 2 and the surface material 3 are bonded to each other by the heat laminating method through the cohesive peeling layer 14. As conditions, the temperature is 100 to 200 ° C., more preferably 130 to 180 ° C., and the pressure is 0.1 to 2 MPa, more preferably about 0.1 to 1 MPa.

  In this step 2, the cohesive release layer 14 is in a molten state by heat, and the adhesion to the base material 2 is achieved by the self-fusion, so it is necessary to use an adhesive for the adhesion between the base material 2 and the surface material 3. In addition, the uniformity of the adhesive surface between the base material 2 and the surface material 3 is not impaired by the uneven application of the adhesive. Therefore, high uniformity of the adhesive surface between the base material 2 and the surface material 3 can be ensured.

  A metal foil layer, a sealant layer, or the like is laminated as a further functional layer between the step 2 and the subsequent step 3 as necessary.

Process 3
Next, as shown in FIG. 4 (c), a notch 20 in the shape of a hot water cut hole is made from the side of the substrate 2, but in the present invention, a method of pushing the Thomson blade while moving up and down may be used. It is preferable to make this notch 20 by half-cut processing using a die-cut roll having high accuracy. In addition, the half cut in this invention means that it is a half cut with respect to a lid | cover material, for example, the half cut process at the time of hot water cut hole formation is at least a base material penetrates and it is to a cohesive peeling layer. It refers to the drilling process that reaches. By performing a half-cut process using a die-cut roll, it is easy to adjust the depth of the notch, and not only the accuracy of the notch is improved, but also the workpiece (hot-water lid material) can be processed while being transferred. Therefore, the processing speed can also be improved. Moreover, in this invention, since an adhesive agent is not used for adhesion | attachment with the base material 2 and the surface material 3 as mentioned above, since the high uniformity of the adhesive surface between these can be ensured, the half cut using the die cut roll Combined with the ease of adjusting the depth of cut by processing, it is possible to remarkably increase the certainty of the formation of the cut reaching the agglomerated release layer.

  In the present invention, at least half-cutting of the hot water cutting hole (half-cutting of the base material) is performed in this step 3, but the other necessary processing, that is, the peeling tab used when peeling the surface material is performed. Formation (half-cut processing of the base material), separation line formation of the boundary between the part where the surface material is peeled off and the other part (half-cut processing of the surface material), and outline removal of the entire hot water lid member (full punching processing) Etc. are preferably performed together, and the number of steps may be reduced as much as possible in consideration of the combination. However, when the residual part removal of the below-mentioned process 4 is performed, the process which needs to be performed after that will be performed after the process 4.

Process 4
FIG. 4D is a state where the entire hot water lid member 1 is connected to only the portion of the cohesive peeling layer 14 by making a cut in the shape of the hot water hole in the step of FIG. 4C. The process of removing the remaining part 21 is shown. The residual portion 21 can be removed by a method such as evacuation from the substrate 2 side.

In addition, as a manufacturing method according to the reference example, without performing the process of FIG. 4D, the hot water lid material for instant food is completed with the hot water lid material 1 in the state shown in FIG. 4C. and the like be the goods. In this case, the hot water lid material 1 of the present invention in which the side of the base material 2 is bonded to the container in which the contents are stored is distributed to the market with the remaining portion 21 remaining, and the consumer When the surface material 3 is peeled off when the hot food is cut off for instant food, the remaining part 21 is attached to the surface material 3 and peeled off together with this to form a hot water hole. It becomes.

In the manufacturing method according to the reference example to be completed up to step 3, the hot water lid member to be manufactured will remain in the portion of the hot water hole until the consumer peels off the surface material. In order to avoid the remaining part from being mixed into the food as the contents during distribution or use, it is necessary to increase the adhesive strength in the thermal laminate in step 3 to some extent. However, if the strength is increased more than necessary, it is difficult to peel off the surface material. Therefore, it is important to adjust the adhesive strength during thermal lamination.

  In this respect, according to the manufacturing method of the present invention which performs up to step 4, there is no fear that the remaining portion will be mixed into the contents, but since this step 4 is required, in terms of production cost, up to step 3 It is often disadvantageous compared to. Accordingly, it is preferable to appropriately select which of these manufacturing methods is used in consideration of product specifications, costs, and the like.

Based on FIG. 5, described hot cut lid 1 according to the present onset bright.

  As shown in FIG. 5, the base material 2 of the hot water lid material 1 of this example includes a sealant layer 9, a metal foil layer 10, an adhesive layer 11, and a paper layer from the container 4 (see FIGS. 2 and 3) side. 12 and the adhesive layer 13 are laminated. However, a metal vapor deposition layer can be used instead of the metal foil layer 10.

  The sealant layer 9 is for enabling the hot water draining lid 1 to be heat-sealed to the container 4 (see FIGS. 2 and 3). For example, polyethylene, ethylene vinyl alcohol, poval, etc. have good heat sealability. Resin is used. The metal foil layer 10 is mainly used to provide the light-sliding lid material 1 with light-shielding properties. For example, an aluminum foil can be used, and the adhesive layers 11 and 13 can be made of laminated materials on both sides. Resins having good adhesion, such as polyethylene and polypropylene, can be used. In addition, the paper layer 12 is for imparting a necessary strength to the main hot water lid member 1, and the hot water lid member 1 of the present example is such that the paper layer 12 is interposed in the base material 2, Even when the hot water is cut off by peeling off one edge portion of the surface material 3 covering the hot water hole 6 of the base material 2, it is difficult to be deformed.

  The surface material 3 in this example is formed by laminating a cohesive peeling layer 14 and a surface base material layer 15 from the side of the base material 2 (see FIGS. 2 and 3). The cohesive release layer 14 is a layer for peeling the surface material 3 from the base material 2 by cohesive failure of the layer, and the surface material 3 is adhered to the base material 2 via the cohesive release layer 14. Yes. For the cohesive release layer 14, the above cohesive release film is preferably used. Since the detailed description of the cohesive release layer is as described above, it is omitted here. Moreover, the surface base material layer 15 of this example has a single-layer structure that can be made of PET or the like.

  The hot water cutting hole of the hot water lid material 1 in this example is formed through the base material 2. Further, in the peeling tab 8, the base material 2 in this portion is removed by half-cut processing, and the surface material 3 is extended. In addition, as for the peeling tab 8 part in this example, it is what removed the base material 2 of the said part as mentioned above, but only by half-cutting the base of the peeling tab 8 from the base material 2 side. The substrate 2 can be left attached.

Next, the hot water lid material 1 according to the reference example will be described with reference to FIG. In addition, since the hot water lid material of this example is the same as the hot water lid material 1 according to the present invention described above, different points from the hot water lid material 1 according to the present invention will be described here.

FIG. 6 is a schematic enlarged cross-sectional view of the vicinity of the hot water cutting hole of the hot water lid member according to the reference example . (A) is a figure which shows the state before peeling of a surface material. (B) is a figure which shows the state after peeling of a surface material.

Water cut lid material according to the present invention is of the type produced by the method contain up to the step 4 of the present invention, but were those removal of residual portion, this example water cut cover material 1 is a state in which the remaining portion 21 remains. Therefore, in the hot water lid material 1 of this example in which the side of the base material 2 is bonded to the container in which the contents are stored, the residual portion 21 is left in the market and the consumer has instant food. When the surface material 3 is peeled off when the hot water is cut for eating, the remaining portion 21 adheres to the surface material 3 and is peeled off together with this to form a hot water hole.

7 and 8 show modifications in which the metal foil layer 10 on the base material 2 side is moved to the surface material 3 side in the hot water lid material according to the present invention and the hot water lid material according to the reference example described above, respectively. Thus, both can be obtained in the same manner as the hot water lid material according to the present invention and the hot water lid material according to the reference example . 7 and 8, the same reference numerals as those in FIGS. 1 to 6 denote the same members or parts. 7 and 8, 16 is a paper layer, and 17 is an adhesive layer, which is the same as the paper layer 12 and the adhesive layers 11 and 13 described above.

  In the case of the modifications shown in FIGS. 7 and 8, since the hot-cut hole is not formed in the metal foil layer 10, the whole can be provided with a light shielding property. The same effect can be obtained even if a metal vapor deposition layer is used instead of the metal foil layer 10.

  In the above description, the form in which the aggregated release layer is provided on the surface on the surface material side has been described. However, the aggregated release layer may be provided on the surface on the base material side, and further on both surfaces of the base material and the surface material. A cohesive release layer may be provided.

  Further, in the production method of the present invention, the first layer is made of a resin containing a copolymer of polypropylene or propylene and other α-olefin, instead of the cohesive release layer, and the second layer is made of polypropylene and a melting point. Even if it uses the delamination film comprised by the resin which has a mixture of the high density polyethylene or linear low density polyethylene of 120 degreeC or more, or the thermoplastic resin whose melting | fusing point is 30-100 degreeC Can be applied.

  Furthermore, in the production method of the present invention, in Step 1, instead of the aggregation release layer, the same type of olefin resin layer as the base layer is laminated, and the olefin resin layer or adhesion layer 11 is peeled off. After applying a non-adhesive agent in which silicon is added to nitrified cotton-based resin to a desired portion, the remaining processing can be applied in accordance with Step 2 and the subsequent steps.

It is a top view which shows one Embodiment of the instant food package which uses the hot water cup lid material for instant foods of this invention. It is an AA schematic sectional drawing in FIG. It is a BB schematic sectional drawing in FIG. It is process drawing for demonstrating the manufacturing method of the hot water lid member for instant foods of this invention. It is a schematic enlarged cross-sectional view of the vicinity of the hot water cutting hole of the hot water cutting lid according to the present onset bright. (A) is a figure which shows the state before peeling of a surface material. (B) is a figure which shows the state after peeling of a surface material. It is a typical expanded sectional view of the vicinity of the hot water cutting hole of the hot water cutting cover material which concerns on a reference example . (A) is a figure which shows the state before peeling of a surface material. (B) is a figure which shows the state after peeling of a surface material. It is typical sectional drawing which shows the modification which moved the metal foil layer by the side of the base material in the hot water lid material which concerns on this invention to the surface material side. It is typical sectional drawing which shows the modification which moved the metal foil layer by the side of the base material in the hot water lid material which concerns on a reference example to the surface material side. It is a top view which shows the other example of the tab for peeling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water lid material 2 Base material 3 Surface material 4 Container 5 Opening tab 6 Hot water hole 7 Separation line 8 Peeling tab 9 Sealant layer 10 Metal foil layer 11 Adhesive layer 12 Paper layer 13 Adhesive layer 14 Aggregation peeling layer 15 Surface Base material layer 16 Paper layer 17 Adhesive layer 20 Notch 21 Remaining part

Claims (3)

In the method for producing a hot water lid for instant food, which has a configuration in which a base material in which a hot water cut hole is drilled in a region offset to one edge and a surface material covering the base material is laminated,
At least one of the base material and the surface material is produced in a laminated structure in which an aggregation release layer is provided on the surface,
After adhering the surface material and the base material by a heat laminating method through the aggregation release layer ,
For instant food, characterized in that the hot water cut hole-shaped half cut is formed from the base material side at the hot water cut hole forming position of the base material, and a punching process is performed to remove the remaining portion inside the half cut Manufacturing method of hot water lid material. At least in the instant food hot water lid member having a configuration in which a base material in which a hot water cut hole is perforated in a region offset to one edge and a surface material covering the base material are laminated,
A front Kimotozai and said surface material, through the agglutination peeling layer are bonded by heat lamination method, moreover the melt cutting holes, after bonding of the surface material and the base material, the hot water of the base material A hot water slicer for instant foods, characterized in that the hot water cut hole shape half cut is formed from the base material side at the cut hole forming position, and is formed by drilling to remove the remaining portion inside the half cut. Lid material. The hot water lidding material for instant food according to claim 2 , wherein the surface material is a laminated material having a metal layer.

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