JP2016164078A - Lid member with hot water drainer hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid member which has a lamination structure of an inner lid and an outer lid to form a hot water drainer hole on the inner lid by peeling them, and secures excellent peeling, and prevents unintended breakage between inner layers.SOLUTION: A release layer arranged between an inner lid and an outer lid is partitioned into four kinds of areas as first to fourth peeling areas in a descending order of area rates of a release agent. The first peeling area 31 is an area having a lid member center angle of 180° with a knob part 2 placed in a center, and extends along a lid member peripheral edge. The third peeling area 33 extends on an outer side than a hot water drainer hole cut 4 along an inner side of the first peeling area 31 from a first position A to a second position B. The second peeling area 32 is structured of two areas of an area 32a extending from the first position A to an inner lid cut 5 along the first peeling area 31 and the lid member peripheral edge, and an area 32b extending from the second position B to the inner lid cut 5 along the first peeling area 31 and the lid member peripheral edge. A remaining area (except for an inner side of the hot water drainer hole cut 4) is the fourth peeling area 34.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a lid material used for a cup noodle container, which has a laminated structure of an inner lid and an outer lid, and is formed with a hot water cut hole formed in the inner lid by peeling both of them.

  In the case of instant noodles with cups of raw noodle type, the raw noodles, soups, ingredients, etc. contained in the cup container are taken out of the cup and returned to the container. And after pouring hot water into a container and leaving it to stand for a fixed period of time (that is, after noodles have hot water), hot water cutting is performed. Patent Documents 1 and 2 disclose lid materials that simplify this hot water cutting operation.

The functions of these lids are as shown in FIG. That is, the lid material has a two-layer structure of an inner lid and an outer lid. The inner lid contains the “peeling start cut”, “hot water cut hole”, and “inner lid cut” shown in FIG. 1a. ing. By bonding the inner lid to the outer peripheral flange portion of the container body, the lid member is fixed to the container body, and as a result, the outer lid is positioned on the top surface of the container (FIG. 1b).
When the knob is picked from the state of FIG. 1b and the lid material is peeled off from the container main body, the outer lid peels off from the inner lid from the “peeling start cut” position, and a hot water cut hole is formed in the inner lid portion remaining on the container side. Formed and peeled off in the state where the outer lid and the inner lid are adhered from the location of the `` inner lid cut line '' to form a large opening for taking out the contents, and as a result, in the mouth of the cup-shaped container, Only the inner lid part in which the hot water cutting hole is formed remains (FIG. 1c).
In FIG. 1c, the hatched area on the back surface of the outer lid is a part of the inner lid remaining on the outer lid. Pour hot water in the state of FIG. 1c to pour noodles. Next, the container body is tilted, hot water is cut from the hot water cutting hole, and further, the utensils are added and hot water is poured again, and instant noodles are completed.

Japanese Patent No. 3933481 Design Registration No. 1166997

In the lid as described above, when peeling the lid from the container body,
(I) The peeling of the inner lid and the outer lid starts smoothly at the position of the “peeling start cut”,
(Ii) The inner lid and the outer lid are reliably peeled off in the peripheral area of the “hot water cut hole cut”, and the hot water cut hole is reliably formed in the inner lid,
(Iii) From the position of the “inner lid cut”, it is necessary that the inner lid and the outer lid are peeled off from the container main body in a state where they are adhered without being peeled off.

For convenience, the two-layer structure of “inner lid” and “outer lid” has been described, but strictly speaking, each of “inner lid” and “outer lid” is further composed of a plurality of layers. However, the “inner lid” is intended so that a plurality of layers gather and behave as one layer (inner lid), and the same applies to the “outer lid”.
And when the above-mentioned peeling is not performed well, due to poor peeling, the “inner lid” or “outer lid” breaks between the inner layers that are not intended, and as a result, the appearance and function are reduced, and the product The value will be reduced.

  The present invention is devised with respect to the pattern of the release layer at the boundary between the “inner lid” and the “outer lid” in order to prevent such a problem of peeling failure.

The lid material with a hot water cut hole of the present invention,
A: The outer lid and the inner lid are detachably laminated through a release layer, and have a knob that protrudes outward.
Lee: On the inner lid
In the vicinity of the knob, two peeling start cuts are formed on the radially outer side and the inner side (relatively “far side” and “near side” as seen from the center of the lid member),
A plurality of hot water cut holes along the circumferential direction of the inner lid in the region from the first position to the second position in the predetermined lid material central angle range with the knob in the center inside the inner peeling start cut A cut is formed,
With respect to the hot water cut hole cut, an inner lid cut extending from one edge of the inner lid to the other edge is formed on the side opposite to the peeling start cut, intersecting a line connecting the knob and the center of the lid.
C: The release layer is made of a release agent, and is formed in a region surrounded by an outer peeling start cut, an inner lid cut, and a peripheral edge of the lid material.
And the said mold release layer is divided into four types of area | regions from which the area ratio of a mold release agent differs relatively, The 1st-4th peeling is carried out to the said 4 types area | region in order with a high area ratio of a mold release agent. When the area
The first exfoliation region extends along the periphery of the lid material in a region where the knob portion is placed in the center and the lid material central angle is approximately 180 °,
The third peeling region extends from the first position to the second position outside the hot water cut along the inner side of the first peeling region,
The second peeling region includes a region extending along the first peeling region and the periphery of the lid material from the first position to the inner lid cut line, and a first peeling region and the lid material from the second position to the inner lid cut line. It consists of two areas, the area extending along the periphery,
A region surrounded by the third separation region, the two regions constituting the second separation region, and the inner lid cut, and the region outside the hot water cut (4) is the fourth separation region. Has been.

In the lid material with a hot water cut hole of the present invention having the above-described configuration, the “first peeling region” having the highest area ratio of the release agent is located in a region where there is a peeling start cut that triggers the start of peeling. Therefore, the start of peeling becomes smooth. That is, by increasing the area ratio of the release agent constituting the release layer disposed in the “first release region” (that is, increasing the concentration per unit area of the release agent), the peel strength is reduced. Therefore, it is possible to peel easily without applying a large force to the peeling start cut.
The area ratio of the release agent constituting the release layer disposed in the “second release region” is relatively lower than the area ratio of the release agent in the “first release region”. For the following reason. That is, in the “first peeling region” where peeling begins, the external force acting on the “pick part” acts almost perpendicularly to the lid surface, but the peeling proceeds to the second peeling region. Sometimes, the “pick portion” is pulled in a direction substantially parallel to the lid material surface, and the external force is generally greater than that at the start of peeling. Therefore, by relatively lowering the area ratio of the release agent constituting the release layer disposed in the “second release region”, the peel strength can be increased, while maintaining good release properties, The strength of the entire container is not impaired.

The area ratio of the release agent constituting the release layer disposed in the “fourth release region” is the lowest. This is due to the following reason.
The “fourth peeling region” occupies the largest area compared to the other “first peeling region”, “second peeling region”, and “third peeling region”, and if considering the cost, the mold release It is desirable to reduce the total amount of the release agent in the lid material by reducing the area ratio of the agent. On the other hand, considering the labor of the peeling work by the product purchaser, it is desirable to increase the area ratio of the release agent to lower the peeling strength, and to proceed with the peeling work with a small force. become.
However, in the same manner as described above in the prior art, in the lid material of the present invention, heat is applied by heat sealing at the flange portion surrounding the opening of the container body while covering the opening of the container body. The heat and pressure by heat sealing tend to act in the direction of increasing the peel strength. Here, since the “first peeling area”, “second peeling area”, and “third peeling area” are arranged near the periphery of the lid member, heat and pressure due to heat sealing act, Although the peel strength is higher than the peel strength before heat sealing, the “fourth peel region” is located in a further inner region excluding the peripheral edge of the lid, so that heat and pressure from heat sealing act on it. The peel strength after heat sealing is almost the same as the peel strength before heat sealing, and the peel strength does not increase. Then, as the peel strength in the state where the lid material alone, that is, without heat sealing, the area ratio of the release agent constituting the release layer disposed in the “fourth release region” is the lowest, so that the peel strength is relatively Although it is the largest, the lid material in the final product state, that is, the peel strength in the state after heat sealing, is high only in other regions, so it does not necessarily become the largest, but the release agent Depending on the difference in the area ratio, the peel strength is lower than the other regions as a result.
Therefore, by reducing the area ratio of the release agent that constitutes the release layer disposed in the “fourth release region”, the total amount of the release agent in the lid material can be suppressed, and at the same time, By reducing the peeling strength of the “4 peeling region”, the peeling work can be advanced with a small force.
On the other hand, if the area ratio of the release agent constituting the release layer arranged in the “fourth release region” is increased, the amount of release agent used increases and the cost disadvantage increases. In the situation where the peel strength is low and the cup noodle container is transported before eating, the internal pressure of the container is instantaneously increased due to a drop or other impact, and the “fourth peel region” occupies the largest area. The quality disadvantage of increasing the probability of peeling at the boundary between the inner lid and the outer lid is also increased.
In addition, the “fourth peeling region” is a region where a hot water cut hole is formed by peeling, and even when the outer lid and the inner lid are peeled, only the inner region of the “hot water cut hole cut” is the inner lid. Needs to be extracted together with the outer lid without peeling off from the outer lid. Therefore, it is preferable that the “fourth peeling region” is not disposed inside the “hot water cut hole cut” and the outer lid and the inner cover are joined to each other inside the “hot water cut hole cut” without using a peeling layer. Furthermore, the outer lid and the inner lid are more firmly joined inside the “hot water cut hole cut” so that the inner lid can be pulled out together with the outer lid without peeling off from the outer lid. It is desirable to arrange an anchor coating agent (a kind of adhesive) inside the “hole cut”.

Furthermore, a “third peeling region” is arranged between the “first peeling region” and the “fourth peeling region”. Thereby, the following effects are obtained.
That is, as described above, in a situation where the cup noodle container is transported before eating, the internal pressure of the container may increase instantaneously due to a drop or other impact. In that case, pressure is applied to the boundary between the outer lid and the inner lid through the “hot-cut hole cut” or “inner lid cut” exposed in the container, and unintentional peeling may occur from the peeling start cut or the inner lid cut. is there. In that case, there is no increase in the peel strength due to the “first release region” in which the peel strength is lowered by setting the area ratio of the release agent to be high and the effect of heat and pressure by heat sealing does not reach. If the “fourth peeling region” where the peeling hardness is low is adjacent, unintended peeling from the separation start cut propagates to the “fourth peeling region”, or unintentional peeling from the inner lid cut occurs It is not preferable in that the probability of an accident in which the content (food item) comes into contact with the outside air is increased due to propagation to the “one peeling region” and a hot water cut hole is formed. Therefore, by making the area ratio of the release agent relatively lower than the area ratio of the release agent constituting the release layer arranged in the “first release area”, the “first release area” and “ By disposing the “third peeling region” having a larger peeling strength than the “fourth peeling region” between them, the possibility of an accident due to the unintended peeling described above can be reduced.

  When the peeling further proceeds and exceeds the “fourth peeling area” (that is, when the inner lid cut line is exceeded), the release layer does not exist, and therefore the container is in a state where the inner lid and the outer lid are adhered to each other without peeling. It is ensured that it will be peeled off from the body. Furthermore, in a state where the outer lid and the inner lid are more joined in the region beyond the inner lid cut, an anchor coating agent (a kind of adhesive) is used in the region beyond the inner lid cut so that the outer lid and the inner lid are more securely peeled from the container body. It is desirable to arrange.

The figure explaining the function of the conventional lid member with a hot water cut hole. FIG. 2A shows an inner lid side of the lid member, and FIG. 2B shows a cross section taken along line bb in FIG. 2A. FIG. 3a shows the positional relationship between the entire release layer divided into four different peel strengths and the inner lid, and FIG. 3b shows only the release layer in FIG. 3a. . The figure explaining the area ratio of a mold release agent.

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 2 shows a lid member F according to an embodiment of the present invention. 2a shows the inner lid 20, and FIG. 2b is a cross-sectional view taken along the line bb in FIG. 2a, showing the laminated structure of the lid material F. FIG.
The lid material F is configured by laminating an outer lid 10 and an inner lid 20 in the same manner as the conventional lid material shown in FIG. And the side of the inner lid 20 is bonded and fixed to the flange portion of the cup container, and the knob portion 2 is picked and peeled off to form a hot water hole in the inner lid portion remaining on the container side. About such a rough function, the lid | cover material of this invention is the same as the conventional lid | cover material. The lid | cover material of this invention has the characteristics in the specific pattern of a mold release layer so that it may demonstrate below.

<< Incisions formed in the inner lid 20 >>
FIG. 2 a shows a cut formed in the inner lid 20. Each cut described below is formed through the entire thickness of the inner lid 20.

(A) Separation start cut 3a, 3b
The peeling start cut gives an opportunity to start peeling between the outer lid 10 and the inner lid 20 when the knob 2 is picked and the lid material is peeled off. Two peeling start cuts 3a and 3b are provided on the outer side and the inner side in the radial direction of the lid, and this is due to the positional deviation that may occur when the lid is bonded and fixed to the flange portion of the cup container. is there.
That is, it is originally intended that the inner peeling start cut 3b is positioned on the outer peripheral edge of the flange portion to give a trigger for the peeling start. However, when the bonding position is shifted and the peeling start cut 3b is positioned inside the flange, the original function is lost as a result of the peeling start cut 3b being bonded. In that case, the peeling start notch 3a on the outer side can give a trigger for the peeling start.
In the present specification, the two peeling start cuts 3a and 3b are distinguished by the expressions “outside” and “inside”. “Outside” refers to the radial direction when viewed from the center of the lid. A relatively “far side” is meant, and “inside” means a relatively “close side”.

(I) Hot water cut hole cut 4
When the outer lid 10 and the inner lid 20 are peeled off, the inner region of the water cut hole cut 4 formed in the inner lid is not peeled off from the outer lid 10. That is, only the inner region of the circular hot water cut hole 4 is extracted from the inner lid 20 together with the outer lid 10, and as a result, a hot water cut hole corresponding to the shape of the hot water cut hole 4 is formed in the inner lid 20 ( See FIG. 1c).
A plurality of hot water cut hole cuts 4 are formed along the circumferential direction of the inner lid 20, and the knob 2 is placed in the center, and the first position (A) to the second position (B) within a predetermined central angle range of the lid material. There are a plurality of cut groups in the region leading to.
That is, in the present specification, the first position (A) refers to a position corresponding to one end of a plurality of hot water cut holes 4 scattered in the circumferential direction. A position corresponding to one end on the opposite side is defined as a second position (B).

(C) Inner lid cut 5
The inner lid cut line functions as a position where peeling of the outer lid 10 and the inner lid 20 ends. That is, when picking the knob portion 2 and peeling off the lid material, the outer lid 10 and the inner lid 20 are peeled off before the peeling reaches the inner lid cut 5, but from the position of the inner lid cut 5, the outer lid 10 and the inner lid 20 are not peeled off, and the two are integrally peeled off from the flange of the cup container, and as a result, a large opening for taking out the contents is formed (see FIG. 1c).
The inner lid cut 5 is formed on the opposite side to the peeling start cuts 3a and 3b with respect to the hot water cut hole 4 and intersects with a line connecting the knob 2 and the center of the lid material, To the other periphery.

《Laminated structure》
2B is a cross-sectional view taken along the line bb in FIG. 2A and shows a laminated structure of the lid material F. FIG. The lid material can be grasped as a two-layer structure of “outer lid 10” and “inner lid 20” if attention is paid to its functional aspects, but strictly speaking, each of “outer lid 10” and “inner lid 20” Furthermore, it is composed of a plurality of layers. However, the “inner lid” is intended so that a plurality of layers gather and behave as one layer (inner lid), and the same applies to the “outer lid”. In FIG. 2b, each layer is shown to be thicker than the actual thickness for the sake of clarity.

The outer lid 10 is configured by laminating a plastic film layer 11, an adhesive layer 12, and a paper layer 13. The inner lid 20 is configured by laminating a polyethylene layer 21, an aluminum foil 22, and a thermal adhesive resin layer 23.
If the outer lid 10 and the inner lid 20 are not peeled off as intended, the “outer lid 10” or the “inner lid 20” breaks between unintended inner layers due to poor peeling, resulting in an appearance. And the function is reduced and the product value is reduced. In order to prevent such a peeling failure, the present invention devised an area ratio pattern of a release agent constituting the release layer with respect to the release layer provided between the outer lid 10 and the inner lid 20 ( Details will be described later).

<Location of release layer>
FIG. 3 a schematically shows the positional relationship between the inner lid 20 and the entire release layer. Actually, the release layer is provided between the outer lid 10 and the inner lid 20 as shown in the cross-sectional view of FIG. FIG. 3b shows only the release layer in FIG. 3a.

The release layer is not provided over the entire boundary between the outer lid 10 and the inner lid 20, but is provided only in a partial region. That is, the release layer is provided only in a region surrounded by the “outside peeling start cut 3 a”, “inner lid cut 5”, and “periphery of the lid material”. As a result, the inner lid 20 can be peeled off from the outer lid 10 and can remain on the flange portion of the cup container only in the region (however, the inner region of the hot water cut hole cut 4 can be peeled off from the outer lid 10). First, it is removed together with the outer lid 10 to form a hot water cutting hole).
In order to ensure the above behavior, as can be seen from the cross-sectional view of FIG. 2b, in the region surrounded by “inner lid cut 5” and “periphery of the lid material” and the inner region of the hot water cut hole cut 4 In addition, an anchor coat layer (adhesive layer) is provided, and in these regions, it is preferable that the inner lid 20 and the outer lid 10 are not peeled off.

<< Area ratio of release agent constituting release layer (peel strength) >>
First, the “area ratio of the release agent” will be described with reference to FIG. As schematically shown in FIG. 4, the release agent is applied in a halftone dot pattern instead of a solid coating to a certain area. In FIG. 4, the circular portion is a region where the release agent is not applied, and the release agent is applied to other portions. Therefore, the “area ratio of the release agent” is an area ratio of “a portion excluding a circular portion” with respect to the total area of the rectangular region R in FIG. 4.

As will be described later, the relative relationship of the area ratio is as follows.
“First Peeling Area> Second Peeling Area> Third Peeling Area> Fourth Peeling Area”

When only the lid material is observed alone, the larger the area ratio, the lower the peel strength (easier to peel). That is, the relative relationship of the peel strength when only the lid material is observed alone is as follows.

(Relative relationship of peel strength when only the lid is observed)
“First peeling area <second peeling area <third peeling area <fourth peeling area”

However, after the lid material is heat-sealed to the container body flange portion, the first to third peeling regions located in the heat-sealing region each have a higher peel strength due to the effect of heat sealing. However, since the fourth peeling region that is only separated from the heat seal region is not affected by the heat and pressure of the heat seal (the peel strength is increased), the peel strength of the fourth peel region is finally the weakest. That is, in the state of the final product in which the lid member is thermally bonded to the container body flange portion, the relative relationship of the peel strength is as follows.

(Relative relationship of peel strength in the state of the final product with the cover material thermally bonded to the container flange)
“Fourth peeling region <first peeling region <second peeling region <third peeling region”

<< Positional relationship of first to fourth peeling regions >>
In the lid material of the present invention, the release layer is partitioned into four types of regions in which the area ratio of the release agent is relatively different. Let each area | region be the 1st-4th peeling area | region in order with a large area ratio.

The first peeling region 31 is a region painted black in FIG. 3, and extends along the periphery of the lid member in a region where the knob portion 2 is placed at the center and the lid center angle is approximately 180 °. The two peeling start cuts 3 a and 3 b are located in the first peeling region 31.
The third peeling region 33 is a region shown in an orthogonal mesh pattern in FIG. 3, and the first position is located on the outer side in the radial direction from the hot water cut hole cut 4 along the inner side of the first peeling region 31. It extends from (A) to the second position (B).

  As described above, the first position (A) refers to a position corresponding to one end of a plurality of hot water cut holes 4 and the second position (B) corresponds to one end on the opposite side. Says the position. That is, the 3rd peeling area | region 33 is arrange | positioned facing the hot water cut hole cut 4 groups which are scattered in multiple numbers.

Since the second separation region 32 is divided into two regions, they are represented by reference numerals 32a and 32b for convenience. The second peeling region 32a extends from the first position (A) to the inner lid cut line 5 along the first peeling region 31 and the periphery of the lid material. The second peeling region 32b extends from the second position (B) to the inner lid cut line 5 along the first peeling region 31 and the periphery of the lid material.
The fourth peeling region 34 is a region surrounded by the “third peeling region 33”, the “two regions 32a and 32b constituting the second peeling region”, and the “inner lid cut 5” (of the hot water cut hole cut 4). Excluding the inside).

《Meaning of setting area ratio of release agent to 4 types》
(1) First peeling region 31
The first release region 31 has the largest area ratio of the release agent in the release layer. Since the 1st peeling area | region 31 is located in the area | region in which the peeling start notches 3a and 3b used as a trigger of peeling start exist, it is set as the structure which peels easily by enlarging the area ratio of a mold release agent.

(2) Second peeling regions 32a and 32b
The second peeling regions 32a and 32b extend to both sides of the first peeling region 31 along the periphery of the lid member. In the first peeling region where peeling starts, the external force for peeling that acts on the knob 2 acts almost perpendicularly to the lid surface, but when the peeling proceeds to the second peeling region, the knob 2 Is pulled in a direction substantially parallel to the lid surface, and the external force is generally greater than at the start of peeling. Considering this, the area ratio of the release agent is such that the area ratio in the second peeling regions 32a and 32b is relatively smaller than the area ratio in the first peeling region. That is, the peel strength in the second peel regions 32a and 32b is relatively greater than the peel strength in the first peel region. Thereby, the fall of the intensity | strength of the whole container is prevented, maintaining favorable peelability.

(3) Third peeling region 33
The third peeling region 33 is located between the first peeling region 31 and the fourth peeling region 34.
In situations such as transporting a cup noodle container before eating, the container internal pressure may increase momentarily due to a drop or other impact. In that case, pressure is applied to the boundary between the outer lid 10 and the inner lid 20 through the hot water cut hole 4 and the inner lid cut 5 exposed in the container, and unintentional peeling from the peeling start cuts 3 a and 3 b or the inner lid cut 5. May occur. In that case, the “first release region 31” in which the peel strength is low by setting the area ratio of the release agent to be high, and the effect of heat and pressure due to heat sealing is not exerted, and the peel strength is increased. If the “fourth peeling region 34” having a low peeling hardness is adjacent, unintended peeling from the peeling start cuts 3a and 3b propagates to the “fourth peeling region 34”, or from the inner lid cut 5 The unintended peeling propagates to the “first peeling region 31”, and a hot water cut hole is formed, which is not preferable in that the probability of an accident in which the contents (food) come into contact with the outside air increases.
Therefore, by making the area ratio of the release agent relatively lower than the area ratio of the release agent constituting the release layer arranged in the “first release area 31”, the “first release area 31” By disposing the “third peeling region 33” having a larger peel strength than the “fourth peeling region 34” between them, the possibility of an accident due to unintentional peeling described above can be reduced.

(4) Fourth peeling region 34
The fourth release region 34 has the smallest area ratio of the release agent. The fourth peeling region 34 is a region where the hot water cut hole cut 4 is formed. As described above, even when the outer lid 10 and the inner lid 20 are peeled off, only the inner region of the circular hot water cut hole cut 4 is extracted together with the outer lid 10 without peeling the inner lid 20 from the outer lid 10. It is. In order to ensure this, the area ratio of the release agent is reduced to increase the peel strength. As shown in FIG. 2b, it is more preferable to provide an adhesive layer (anchor coat layer) in the inner region of the hot water cut hole 4 to strengthen the bonding between the outer lid 10 and the inner lid 20.

In the fourth peeling region 34, the area ratio of the release agent is the smallest among the first to fourth peeling regions. This is due to the following reason.
The “fourth peeling region 34” occupies the largest area compared to the other “first peeling region 31”, “second peeling region 32”, and “third peeling region 33”, and the cost is taken into consideration. For example, it is desirable to reduce the total amount of the release agent in the lid material by reducing the area ratio of the release agent. On the other hand, considering the labor of the peeling work by the product purchaser, it is desirable to increase the area ratio of the release agent to lower the peeling strength, and to proceed with the peeling work with a small force. become.
However, when the lid member F is bonded to the container main body flange portion by heat and pressure by heat sealing, the peeling area in the part tends to have high peeling strength. Here, since the “first peeling region 31”, the “second peeling region 32”, and the “third peeling region 33” are arranged near the periphery of the lid member F, heat and pressure due to heat sealing act, The peel strength after heat sealing is higher than the peel strength before heat sealing. On the other hand, since the “fourth peeling region 34” is arranged in a further inner region excluding the peripheral edge of the cover material F, heat and pressure by heat sealing do not act, and the peeling strength after heat sealing is heat sealing. There is almost no change from the previous peel strength, and the peel strength does not increase. Then, as the peel strength in a state where the lid material alone, that is, the heat seal is not performed, the area ratio of the release agent constituting the release layer disposed in the “fourth release region 34” is the lowest, so the peel strength is originally Although it is relatively largest, as the peel strength in the state of the final product in the state of the final product, that is, through the heat seal, only the other areas are high, so it does not necessarily become the largest, but the mold release Although it depends on the difference in the area ratio of the agent, the peel strength is lower as a result than other regions.
Therefore, by reducing the area ratio of the release agent constituting the release layer disposed in the “fourth release region 34”, the total amount of the release agent in the lid material can be suppressed and at the same time “ By reducing the peeling strength of the “fourth peeling region”, the peeling work can be advanced with a small force.

  On the contrary, if the area ratio of the release agent constituting the release layer disposed in the “fourth release region 34” is increased, the amount of the release agent used increases and the cost disadvantage increases. In the situation where the peel strength is low and the cup noodle container is transported before eating, the container internal pressure is instantaneously increased due to a drop or other impact, and the “fourth peel region 34 occupying the largest area”. In this case, the quality demerit that the probability of peeling at the boundary between the inner lid and the outer lid is increased.

  Although the distance of the 3rd peeling area | region 33 and the hot water cut hole notch 4 can be set suitably, it is preferable to set as follows as an example. That is, among the plurality of hot water cut holes 4, the distance between the hot water cut hole 4 closest to the third peeling region 33 and the third peeling region 33 is approximately 4 mm.

When the peeling further proceeds and exceeds the fourth peeling region (that is, when the inner lid cut line 5 is exceeded), the release layer does not exist, so that the inner lid 20 and the outer lid 10 are bonded without being peeled from each other. It is ensured that it is peeled off from the container body. In order to further ensure this, it is preferable to provide an adhesive layer in a region beyond the fourth separation region as viewed in the direction of separation (see FIG. 2b).

<< Numerical examples of peel strength and area ratio >>
As described above, in the state where the lid member F is bonded to the container body flange portion, the peel strength of the fourth peel region 34 is the smallest, and for the other three regions, the first peel region 31, the second peel region 32, The peel strength increases in order from the third peel region 33. Examples of specific numerical values are shown in the following table, but these numerical values are merely examples, and can be changed as appropriate.
In the table below, the unit of peel strength is (g / 15 mm width). This means that “the inner lid and the outer lid are bonded through a release agent having a predetermined area ratio, and then heat sealing is performed. A strip of 15 mm width is cut out from the heat and pressure that is assumed and is used as a sample piece of lid material, and an external force almost parallel to the sample sample of the cover material is applied to peel off the inner lid and the outer lid. "Means the external force in the case.
In addition, since the 4th peeling area | region 34 is not heat-sealed, it differs from the value in a table | surface, and actually becomes the smallest 8-40g / 15mm width in 4 area | regions.

As a specific method of giving a difference in peel strength as described above, it can be adjusted by a printing method of a resin ink constituting the release layer. For example, the first peeling region 31 having the largest area ratio of the release agent is formed by performing solid printing on the entire surface of the region by gravure printing using a solid plate.
And the 2nd-4th peeling area | regions 32-34 use the printing plate which set the part of the non-application part of a mold release agent to the circular halftone dot shape which was demonstrated in FIG. 4, and was etched. It is formed by gravure printing.
At this time, the release agent is changed by changing the diameter of the halftone dot, specifically, by gradually increasing the halftone dot size of the release agent non-application portion in the second to fourth release regions 32 to 34. The area ratio can be reduced stepwise.
As a result, in the first to third peeling regions 31 to 33 placed under the influence of heat sealing, the dot size of the release agent non-applied portion is increased stepwise in this order, and the area of the release agent The difference can be provided such that the rate decreases stepwise and the peel strength increases stepwise.

  In addition, as resin for forming a mold release layer, what is generally known in the field of this kind lid material is used. For example, it is a single substance or a mixture of nitrified cotton, polyamide resin, polyester resin, acrylic resin, butyral resin, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer and the like. If necessary, a small amount of silicone or the like may be added.

2 Picking part 3a, 3b Peel start cut 4 Hot water cut hole cut 5 Inner cover cut 10 Outer cover 11 Plastic film layer 12 Adhesive layer 13 Paper layer 20 Inner cover 21 Polyethylene layer 22 Aluminum foil 23 Thermal adhesive resin layer 31 1st Peeling area 32 Second peeling area 33 Third peeling area 34 Fourth peeling area

Claims (4)

A: The outer lid (10) and the inner lid (20) are detachably laminated via a release layer, and have a knob (2) protruding outward.
B: The inner lid (20)
In the vicinity of the knob (2), two peeling start cuts (3a, 3b) on the radially outer side and the inner side are formed,
Inside the inner peeling start cut (3b), in the region from the first position (A) to the second position (B) in the predetermined lid material central angle range with the knob (2) in the center, A plurality of hot water cut holes (4) are formed along the circumferential direction of the lid,
With respect to the hot water cut hole cut (4), on the side opposite to the peeling start cut (3a, 3b), intersecting the line connecting the knob (2) and the center of the lid material, from one edge of the inner lid to the other edge An extended inner lid cut (5) is formed,
C: The release layer is composed of a release agent, and is formed in a region surrounded by the outer peeling start cut (3a), the inner lid cut (5), and the periphery of the lid member. In the lid material with slits,

The release layer is partitioned into four types of regions having relatively different area ratios of the release agent, and the four types of regions are separated from the first to fourth release regions in descending order of the area ratio of the release agent. When
The first peeling region (31) extends along the periphery of the lid material in a region where the knob (2) is placed at the center and the lid material central angle is approximately 180 °,
The third peeling region (33) extends from the first position (A) to the second position (B) outside the hot water cut line (4) along the inside of the first peeling region (31). Extended,
The second peeling region (32) includes the first peeling region (31) and a region (32a) extending along the periphery of the lid material from the first position (A) to the inner lid cut line (5), and the first From the two positions (B) to the inner lid cut (5), the first peeling region (31) and the region (32b) extending along the periphery of the lid material,
A region surrounded by the third peeling region (33), the two regions (32a, 32b) constituting the second peeling region, and the inner lid cut line, and outside the hot water cut hole cut (4). A lid material with a hot water cut hole, characterized in that a certain area is a fourth peeling area (34).
The lid member with a hot water hole according to claim 1, wherein an adhesive layer is provided in an inner region of the hot water hole cut (4) between the outer lid (10) and the inner lid (20).
Between the outer lid (10) and the inner lid (20), an adhesive layer is provided in an area adjacent to the fourth peeling area (34) and surrounded by the inner lid cut line (5) and the periphery of the lid material. The lid material with a hot water cut hole according to claim 1 or 2.
  Of the plurality of hot water cut holes (4), the distance between the hot water cut hole (4) closest to the third peeling region (33) and the third peeling region (33) is approximately 4 mm. The lid | cover material with a hot water cut-off hole of any one of Claims 1-3.

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