JP2013107661A - Lid member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid member in which any peeling error hardly occurs when forming a hot water draining hole, and any rise of an end face of the lid member hardly occurs during transport.SOLUTION: The lid member is formed of a laminate having upper and lower sheets, and has an unsealing pull-tab and a hot-water-draining pull-tab, and a half-cut for the pull-tab passing through a root of the hot-water-draining pull-tab and connecting two points 10a, 10b on an outer edge. There is provided a peeling area in which the upper and lower sheets are laminated with a peeling layer which is print-formed on a lower side of the upper sheet forming a peeling interface so as to be peelable. There is also provided a half-cut for partial peeling to connect two points 11a, 11b on the outer edge so as to surround a plurality of half-cuts for the hot-water-draining holes formed in the peeling area. There is also provided a dot area in which the coating amount of a peeling agent is reduced with a part of a print sheet forming a peeling layer as a dot pattern, and the peeling strength of the upper and lower sheets is partially increased on the inner edge of the peeling area on the outer edge of the lid material connecting the points 10a and 11a, and the points 10b and 11b to each other, respectively.

Description

  The present invention relates to a lid member for sealing an opening of a container that stores articles, and in particular, includes a mechanism for forming a hot water cutting hole for discharging water, hot water, or the like injected into the inside during use. The lid material.

  Conventionally, in a container that stores foods such as instant fried noodles and spaghetti, it is possible to drain hot water (hot water draining) after a predetermined time after pouring hot water when eating, and then eat after that Instant food containers are known.

  The lid material having a hot water draining function for instant food containers is a sheet-like lid in which the upper sheet is the outer surface side and the lower sheet is stacked on the inner surface side (food side), and the outer periphery of the lid There is an easy peel area that can be peeled off by adjusting the adhesive strength on the entire inner surface of the overlap of the lower sheet and the upper sheet in the partial area from the arc part or the upper sheet, or locally on the hot water cutting part. A lid member having a structure in which a plurality of hot water cutting holes are formed in the lower sheet in the region is known. In this case, in consideration of hygiene and the like in practice, the vicinity of the hot water cut hole is often made into a half cut, and the hot water cut hole is often opened during use.

  The lid with a hot water cut hole of the instant food container having the above structure forms an instant food container in which instant food is sealed and sealed by adhesively sealing to the flange at the upper end opening of the container containing the instant food. To do.

  The container in which instant food is sealed and packaged in this way is opened by pulling up the pull pull tab on the outer periphery of the lid on the bonding area side, partially peeling the lid from the flange portion of the container, and opening from the opening. After pouring hot water, the opening pull tab on the outer periphery of the lid is covered again by folding it outside the flange, and left for a few minutes to loosen the instant food in the container softly.

  After that, the hot water cutting pull tab on the easy peeling area side is pulled up to peel the upper sheet of the easy peeling area from the lower sheet along the perforation or half cut made on the upper sheet, and the hot water drilled in the lower sheet Expose the cut hole. Thus, while the container is tilted, only unnecessary hot water inside can be discharged from the hot water cutting hole.

  In such a hot water lid material, paper is used for the upper sheet and a peeling interface is provided on the back surface of the paper, while the cost can be reduced by simplifying the lamination, while the lid material is heat sealed to the container flange portion. When this occurs, moisture contained in the paper layer evaporates momentarily in the seal area, resulting in a decrease in seal strength at the place where the weakest release agent is provided during lamination or in the extreme case the cover material is lifted Sometimes.

  In particular, in order to separate the upper sheet of the peeling area from the lid body, when providing a half cut on the upper sheet at the outer periphery of the peeling area, the half cut for partial peeling and the half cut for the pull tab provided at the base of the pull tab for hot water cutting are the lid. If they intersect within the material, a peeling error will occur, so they must be placed apart so that they do not intersect. However, the point between the points where each half-cut line intersects the outer edge of the lid material is the lid. The release agent application end face is exposed at the outer edge of the material.

As described above, the exposed end surface to which the release agent is applied is a portion where the sealing strength is lowered and the lid material is liable to float. There was a problem.

  The lid with a hot water hole of the instant food container described in Patent Document 1 forms a peeling layer forming an easy peeling layer with a halftone dot pattern or a mesh pattern, thereby enhancing the peeling strength in the peeling area entirely. In the manufacturing process of the lid, unscheduled irregular peeling is prevented from occurring.

Japanese Patent No. 4090608

  Since the lid with a hot water hole described in Patent Document 1 increases the peel strength in the peel region over the entire surface, the peelability during actual use is often impaired. In particular, when a release interface is provided on the back side of the paper, the paper layer breakage occurs due to increased peel strength, and the paper layer remains on the upper surface of the lower sheet. An error sometimes occurred.

  In particular, at the half-cut locations on the front and back surfaces, the upper sheet sinks into the lower sheet at the periphery of the half-cut part from the upper sheet side, and the lower sheet at the periphery of the half-cut part from the lower sheet side due to the cutting of the blade during half-cut processing. Since it was embedded in the upper sheet, peeling errors due to the destruction of the paper layer at the peripheral edge of the half cut were liable to occur by increasing the peeling strength between the layers.

  The problem to be solved by the present invention is to propose a lid material that is unlikely to cause the above-described peeling error at the time of forming a hot water cut hole, and that is unlikely to float on the end face of the lid material during product transportation / distribution. .

  As means for solving the above-mentioned problems, the invention according to claim 1 is a lid member that covers the flange portion formed along the edge of the opening of the container main body so as to be peeled off. Lamination comprising: a lower sheet that seals the lower surface to the flange portion; and an upper sheet that has an upper surface that forms the surface of the lid, has at least a paper layer on the lower surface, and the paper layer is laminated on the upper surface of the lower sheet. A lid body that is substantially the same size as the outer shape of the flange portion and integrally covers the opening and the flange portion, and extends integrally with the lid body so as to be located outside the flange portion. And a pull tab for opening used when separating the lid main body from the opening, and a plurality of hot water cutout holes that extend integrally with the lid main body and discharge liquid from the container main body. A pull tab for hot water cutting, A pull tab half cut that crosses the root portion of the cutting pull tab, connects two points 10a and 10b on the outer edges on both sides of the lid, and penetrates the lower sheet from the lower surface of the lower sheet; In a partial region extending inward of the lid body, the release layer printed on the lower surface of the upper sheet serves as a release interface, and has a release region in which the upper sheet and the lower sheet are peelably laminated. In the peeling region, a plurality of hot water cut hole half cuts having a desired shape corresponding to the hot water cut holes and penetrating the lower sheet from the lower surface of the lower sheet are formed according to a desired arrangement, A partial peeling half-cut is formed along the outer peripheral inner edge of the peeling region so as to surround the hole half-cut and penetrates the upper sheet from the upper surface of the upper sheet. The Fcutt circulates along the outer peripheral inner edge of the peeling area, starting from a point 11a on the outer edge farther than the point 10a as viewed from the hot water pull pull tab and starting at a point 11b on the outer edge farther than the point 10b. A halftone dot region is formed at the inner side of the peeling area excluding the half-cut processed portion of the outer edge of the lid material connecting the points 10a and 11a and the points 10b and 11b, respectively. A cover material characterized in that the part of the printing plate to be formed is a halftone dot pattern, the amount of the release agent applied is locally reduced, and the peel strength of the lower sheet and the upper sheet is partially enhanced. .

  The lid material according to the present invention pays attention to the fact that, in the area surrounded by the half cut for the pull tab and the half cut for partial peeling, that is, in the peeling area, the part in contact with the outer edge is most likely to float during transportation. A halftone dot area is provided at the inner side of the peeling area excluding the half cut processed part of the outer edge of the lid material connecting the points 10a and 11a and the points 10b and 11b, and the part of the printing plate on which the peeling layer is formed is provided. Since the application amount of the release agent is locally reduced as a halftone dot pattern and the peel strength between the lower sheet and the upper sheet is partially enhanced, the problem of floating during transportation is solved.

  In addition, since the halftone dot area is located inside the peeling area and not the halftone dot area up to the end face, there is an effect of preventing a peeling error such as paper breakage that occurs when the peeling strength of the end face is too strong when peeling the lid. In addition, since the halftone dot area is limited to only necessary parts, when the upper sheet in the peeling area is peeled and removed in order to make the hot water cutting hole appear, the peeling resistance is small and the hot water cutting hole can be easily formed. Can do.

  Next, the invention according to claim 2 is the lid material according to claim 1, wherein the halftone dot region is extended inwardly of the half cut for partial peeling.

  The invention according to claim 3 is the lid member according to claim 1 or 2, wherein the halftone dot region is extended inwardly of the half cut for the pull tab.

  According to a fourth aspect of the present invention, the halftone dot region is provided in an annular shape along the inner edges of the pull tab half cut and the partial peeling half cut so as to surround the hot cut hole half cut region. The lid material according to claim 1, wherein:

  In this way, the halftone dot area is not simply kept inside the peeling area except the half-cut processing part of the outer edge of the lid material, but is extended along the pull tab half cut and the partial peeling half cut that form the outer periphery of the peeling area. By this, it has the effect | action which prevents the unnecessary peeling in a half cut part.

  The invention according to claim 5 is characterized in that the amount of release agent applied in the halftone dot region is 30% or more and 90% or less of the amount of release agent applied in the release region other than the halftone dot region. It is a lid | cover material of any one of Claims 1-4.

  The invention described in claim 6 is characterized in that a release agent-uncoated portion is provided at a central portion of the hot-cut hole half-cut to form a fine rectangular non-release region. 5. The lid material according to any one of 5 above.

  According to the container lid according to the present invention, the user can reliably cause the liquid discharge hole (such as a hot water cutting hole) to appear when the liquid is discharged from the container main body, and is prepared in advance in the container. Impairing the liquid discharge mechanism is also greatly reduced. For this reason, the lid | cover material of the container with a liquid discharge hole with high usability and high reliability can be provided.

The lid according to the present invention is composed of two layers, an upper sheet and a lower sheet, and a lid that allows a discharge hole used for hot water draining to appear with a simple operation by a release layer partially provided on the lower surface of the upper sheet. Although it is a material, the halftone dot area that has been provided on the entire surface of the peeling area in the past is placed on the outer edge of the lid material, which is a part where floating tends to occur especially during transportation, to prevent floating. The effect of preventing the occurrence of peeling errors can be exhibited.

  In the inventions according to claims 2 to 4, these problems in the vicinity of the half-cut that are liable to generate a floating or peeling error by extending the halftone dot region inward of the half-cut for pull tab and the half-cut for partial peeling. Can be effectively prevented.

  In the invention according to claim 5, when the coating amount of the release agent in the halftone dot region is 30% or more and 90% or less, the effect of improving the peel strength by reducing the release agent coating amount is effectively exhibited.

  Further, in the invention according to claim 6, in the case where a release agent-uncoated portion is provided in the center portion of the half cut for hot water cut holes and a fine rectangular non-peeling region is formed, the cutting blade is submerged or cut poorly As a result, there is an effect of reliably preventing the occurrence of a peeling error in which the lower sheet of the hot water hole portion adheres to the upper sheet and remains without being removed.

FIG. 1 is a schematic plan view showing an embodiment of a lid according to the present invention and a package using the same. FIG. 2 is a schematic cross-sectional view showing the X-X ′ cross section of FIG. 1. FIG. 3 is a schematic cross-sectional view showing a state where the upper sheet of FIG. 2 is peeled and removed. FIG. 4 is a schematic plan view showing another embodiment of the lid according to the present invention. FIG. 5 is a schematic plan view showing another embodiment of the lid according to the present invention. FIG. 6 is a schematic plan view showing another embodiment of the lid according to the present invention. FIG. 7 is a schematic plan view showing another embodiment of the lid according to the present invention. FIG. 8 is a schematic cross-sectional view showing an embodiment of the lid member according to the present invention. FIG. 9 is a schematic cross-sectional view showing another embodiment of the lid according to the present invention.

Hereinafter, the lid member according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic plan view showing an embodiment of a lid according to the present invention and a package using the same. FIG. 2 is a schematic cross-sectional view showing the XX ′ cross section of FIG. 1. FIG. 3 is a schematic cross-sectional view showing a state where the upper sheet of FIG. 2 is peeled and removed. FIG. 8 is a schematic cross-sectional view showing one embodiment of the lid according to the present invention.

  The container (CT) shown in FIG. 1 is a plastic container for instant foods such as fried noodles and spaghetti that are cooked with hot water and then drained. The container (CT) has a box shape having a substantially rectangular surface, and a container body (BD) in which food such as fried noodles and spaghetti is previously stored in a dry state, and an upper surface of the container body (BD). And a lid member (1) that is detachably bonded to the flange portion (FL) of the opening portion (OP).

The lid | cover material (1) which concerns on this invention is a lid | cover material which seals and covers a flange part (FL) formed along the edge of the opening part (OP) of a container main body (BD) so that peeling is possible.

  As shown in FIG. 1, the flange part (FL) which goes around the opening part (OP) of a container main body (BD) has an outer edge (a) and an inner edge (b). The lid member (1) has a lid main body (2) having substantially the same outer shape as the outer edge (a) of the flange portion (FL) of the opening (OP) of the container main body (BD), and extends to the edge thereof. One or more opening pull tabs (3) used when separating the lid body (2) from the opening (OP) and the lid body (2) are integrally extended to discharge the liquid from the container body (BD). There is a hot-water pull tab (4) used when a plurality of hot-water cut holes (e) are caused to appear in the lid body (2). In the embodiment shown in FIG. 1, one opening pull tab (3) and one hot water drain pull tab (4) are provided.

  The lid member (1) has a lower sheet (5) for sealing the lower surface to the flange (FL), and the upper surface forms the surface of the lid member (1), and has at least a paper layer (22) on the lower surface. (22) consists of a laminate comprising an upper sheet (6) laminated on the upper surface of the lower sheet (5).

  The lid member (1) crosses the root portion of the hot water drain pull tab (4), connects the point 10a (10a) on the outer edge on both sides of the lid member (1), and the point 10b (10b) on the outer edge, It has a half tab (10) for pull tab that penetrates the lower sheet (5) from the lower surface of the sheet (5).

  The pull tab half cut (10) is a straight line in the present embodiment, and is formed as a tangent line in contact with the outer edge (a) of the flange portion (FL). However, the present invention is not limited to this, and the pull tab half cut (10) may be a straight line slightly back and forth from the contact position with respect to the outer edge (a), or along the roundness of the outer edge (a). It may be a curved half cut.

  The lid material (1) includes a pull tab half cut (10), and a release layer (8) formed by printing on the lower surface of the upper sheet (6) in a partial region extending inward of the lid body (2). ) As a peeling interface (20), and has a peeling region (A) in which the upper sheet (6) and the lower sheet (5) are laminated so as to be peelable.

  In the example of FIG. 1, this peeling layer (8) is formed in a portion surrounded by a two-dot chain line, and this partial region is set as a peeling region (A). For this reason, this peeling area | region (A) is located on the surface adjacent to other non-peeling area | regions (B), and is located so that the said area | region (B) may be enclosed.

  When the lid member (1) is viewed in plan (refers to the field of view when the lid body is viewed from above), it extends so that the corner of the hot water pull tab (4) bisects one of the diagonal lines of the rectangle 2 There is an intersection (hereinafter referred to as a center point) (O) where the segment lines (PG) intersect. If the shape of the lid (1) is square, the center point (O) is the intersection of two diagonal lines. Further, if the lid member (1) is circular, the center of the circle becomes the center point (O). Therefore, the peeling region (A) is formed in a substantially rectangular shape that fits in a range between the center point (O) and the hot water cutting pull tab (4). In addition, the separation region (A) is formed symmetrically with respect to one bisector (PG).

  Moreover, as shown in FIG. 1, it extends in parallel toward the center area including the center point (O) of the lid member (1) from the outer edges of both sides of the lid member (1) across the pull tab (4) for hot water cutting, A linear partial peeling half-cut (11) called a half-cut, which is bent and curved and connected to one, cuts the upper sheet (6) to reach the adhesive layer (7). Is provided.

  In the peeling area (A), a hot water cut hole half cut (12) having a desired shape corresponding to the hot water cut hole (e) and penetrating the lower sheet (5) from the lower surface of the lower sheet (5) is desired. Are formed along the outer peripheral inner edge of the peeling region (A) so as to surround the plurality of hot-cut hole half-cuts (12), and from the upper surface of the upper sheet (6) to the upper sheet (6) 6) A partial peeling half-cut (11) penetrating through 6) is provided.

  In the embodiment shown in FIG. 1, the shape of the plurality of half cuts (12) for hot water cut holes is rectangular in a plan view. Moreover, the part without a release agent is formed in alignment with the rectangle at the time of planar view of these hot-cut hole half cuts (12). For this reason, a finer rectangular non-peeling area (C) is formed inside the peeling area (A) in the rectangular area surrounded by the individual hot-cut hole half cuts (12).

  Further, as can be seen from FIG. 1, in the plan view of the lid member (1), the plurality of rectangular half-cuts for hot-water cutting holes (12) include the center of the hot-water cutting tab (4) and the lid material (1). Are arranged symmetrically with respect to a bisecting line (PG) connecting the virtual center point (O) of the upper surface (surface) of.

  From the above, in the lid member (1) according to the present embodiment, the outer edge of the lower sheet (5), which is located on each of both sides crossing the root portion of the hot water cutting pull tab (4), is the main component. A pull tab half cut (10) is formed from the lower surface of the lower sheet (5) so as to connect the upper two points 10a, 10b.

  Moreover, two positions on the outer edge (a) of the flange which are equidistant from the root part on both sides of the base part of the hot water pull tab (4), respectively, are more suitable for hot water cutting than the two points 10a and 10b. From the two starting points 11a and 11b away from the pull tab (10), they extend inward on the surface of the lid body (2) and merge with each other to define a partial region in the lid body (2). In this way, a partial peeling half cut (11) is formed from the upper surface of the upper sheet (6).

  Furthermore, it corresponds to each of a plurality of hot water cut holes (e) so as to penetrate the lower sheet (5) from the lower surface of the lower sheet (5) in a partial region defined by the half-cut for partial peeling (11). A plurality of hot water cut hole half-cuts (12) having the above-described shape and having a desired arrangement in the region are formed.

  For this reason, the portion of the lower sheet (5) to which the half cut (12) for hot water cut holes is attached is removed from the partial area of the upper sheet (6) by the peeling operation of the hot water cut pull tab (4). In the state of being attached to the outer edge of the upper sheet (6), the pull tab half cut (10) and the outer edge of the flange portion (FL) from the two points 10a and 10b to the two starting points 11a and 11b respectively. A part and a part of the closed region surrounded by the partial peeling half-cut (11) can be partly peeled from the lower sheet (5) together with the hot water cutting pull tab (4).

  Therefore, as shown in FIG. 3, the user pulls up the hot water pull tab (4) so as to turn over. By this pulling-up operation, the hot water cutting pull tab (4) and the upper and lower sheets (6), (5) can be separated from the lid (1) at the pull tab half cut (10).

  Therefore, when the user holds the hot water drain pull tab (4) as it is and peels it toward the inside of the surface of the lid body (2), the upper upper sheet ( 6) is rolled up from the lower sheet (5) and peeled off. Since the part peeling half cut (11) is formed, the portion that rises is limited to the region surrounded by the partial peeling half cut (11).

Accordingly, the pull tab pulling operation accompanying the hot water cutting is finally performed as shown in FIG. 3 in which the substantially rectangular upper sheet piece (SH) integrally connected to the hot water pull pull tab (4) is the lid. Separated from the material (1). The separated upper sheet piece (SH) is also integrally attached with the lower sheet portion surrounded by each hot water cut hole half cut (12). That is, in the peeling region (A) of the lower sheet (5), the hole that has been removed due to the adhesion is left as a hot water cutting hole (e). By this, the peeling from which the lower sheet (5) of the lid material (1) is exposed by advancing from pulling up the hot water cutting pull tab (4) to the raising of the peeling area (A) of the upper sheet (6). A plurality of hot water cut holes (e) will appear in the region (A). Therefore, the user can discharge the remaining hot water after cooking the contents by hot water using the hot water cutting hole (e) as in the prior art.

  The partial peeling half-cut (11) starts from a point 11a on the outer edge farther from the point 10a on the outer edge when viewed from the pull tab (4) for hot water cutting, and a point 11b on the outer edge farther than the point 10b on the outer edge. Around the inner peripheral edge of the peeling region (A).

  The lid material (1) according to the present invention has a halftone dot at the inside of the peeling area except for the half-cut processed portion of the lid outer edge connecting the points 10a and 11a on the outer edge and the points 10b and 11b on the outer edge. A region (D) is formed, and the halftone dot region (D) reduces the coating amount of the release agent locally using the portion of the printing plate that forms the release layer (8) as a halftone dot pattern, and the lower sheet (5 ) And the upper sheet (6) are partially enhanced in peel strength.

  As shown in FIG. 1, the halftone dot region (D) is only inside the peeling region excluding the half cut processed portion of the outer edge of the lid material connecting the points 10a and 11a on the outer edge and the points 10b and 11b, respectively. Although it is good, as shown in FIG. 4, it may be extended at the inner side of the half-cut (11) for partial peeling. Moreover, as shown in FIG. 5, you may be extended in the inner side of the half cut (10) for pull tabs.

  In the embodiment shown in FIG. 6, the halftone dot region (D) is extended on both sides of the inner half of the partial peeling half-cut (11) and the inner half of the pull-tab half-cut (10).

  Further, in the embodiment shown in FIG. 7, the half-cut for pull tab (10) and the half-cut for partial peeling (11) so that the halftone dot region (D) surrounds the region of the hot-cut hole half-cut (12). It is provided in an annular shape along the inner side of the.

  In this way, extending the halftone dot region (D) along the inner edge of the half-cut line is to prevent a peeling error caused by the penetration of the blade during half-cutting or to prevent floating during transportation. ,effective.

  The halftone dot pattern in the halftone dot region (D) is not particularly limited, and may be a normal flat mesh, or a grain, a line, or an FM screen.

  In the halftone dot region (D), the amount of release agent applied decreases, but the amount of release agent applied in the halftone dot region (D) is equal to the amount of release agent applied in the release region (A) other than the halftone dot region. It is desirable that it is 30% or more and 90% or less.

  When the coating amount of the release agent is less than 30%, the peeling resistance becomes too large and the possibility of causing a peeling failure increases. Further, if the coating amount of the release agent is 90% or more, the effect of reducing the coating amount may not be obtained.

FIG. 8 is a schematic cross-sectional view showing an embodiment of the lid member according to the present invention. The manufacturing method of the lid | cover material (1) which concerns on this embodiment is as follows.
First, pattern printing (21) is performed on the surface of a piece of art paper as paper (22), and a release agent is printed on the back surface to form a release layer (8). The release agent was surrounded by a half cut (12) for hot water cut holes in a range surrounded by the outer cut edge of the partial cut half cut (11), the pull tab half cut (10), and the lid member (1) therebetween. In the coating area, a halftone dot area (D) is provided in the inner area of the peeling areas 10a to 11a and 10b to 11b on the outer edge, and the coating amount of the release agent is set. It is locally reduced to enhance the peel strength.

  If necessary, a sealing agent (23) may be formed by applying a sealing agent to the surface on which the release agent is printed in advance so that the release agent is not absorbed by the paper and the peeling effect is not lost. .

  Next, a biaxially stretched film (24) is prepared separately, an adhesive (25) is applied to the corona-treated surface of the biaxially stretched film (24), and an aluminum foil (26) is applied by a dry lamination method. Laminate. Next, after the corona discharge treatment was applied to the back surface of the previously printed piece of art paper (22), polyethylene was extruded as an adhesive layer (7) using a T-die type extrusion laminating machine and separately laminated. The biaxially stretched film surface of the laminate of the axially stretched film and the aluminum foil is laminated by a sandwich lamination method. Next, a sealant layer (27) is provided on the aluminum foil surface of the laminate.

  Thus, from the lower sheet (5) comprising the biaxially stretched film (24), the aluminum foil (26) and the sealant layer (27), and the pattern printing layer (21) and the paper (22) covering this. The upper sheet (6) to be formed is laminated through the release layer (8) and the polyethylene to be the adhesive layer (7) to form a laminate of the lid material (1).

  Next, the lower sheet (5) is cut by a rotary die cutter, and half-cut processing is performed up to the adhesive layer (7) or the middle of the paper layer (22). A cut half-cut (12) is provided.

  Similarly, the upper sheet (6) is cut, and half-cut processing up to the adhesive layer (7) is performed to provide a partial peeling half-cut (11). Next, the cover material (1) is punched into the outer shape to obtain a single-sheet cover material (1). Note that half-cutting and punching of the outer shape may be performed simultaneously.

The paper (22) used in the production of the lid (1) according to the present invention, paper having a basis weight of ^50g / ^{m 2 ~150g} / m 2 is preferably used. The type of paper is preferably white with a surface on which pattern printing is performed and having multicolor printing suitability, and both art paper, single art paper, or both coated paper and single coated paper on which a base coat layer for printing is laminated. Etc. can be used suitably. A pure white roll or the like can also be used.

When the basis weight is less than 50 g / m ² , the rigidity and mechanical strength are slightly insufficient. When the basis weight is more than 150 g / m ² , the rigidity is already sufficient and there is no need for more, and time is required for heat sealing. This is not preferable because there is a decrease in the interlaminar strength of the paper and a decrease in the ease of folding of the paper at the time of opening.

  For pattern printing, gravure ink for paper, flexographic ink, offset ink, and the like can be used for each ink printing method. Moreover, you may provide a metallic luster part by foil stamping. Further, in order to protect the pattern printing, a protective varnish may be applied on the surface, or a stretched film such as a polyethylene terephthalate film may be laminated on the surface.

  Moreover, the material of the peeling layer (8) to be used is not specifically limited, What is necessary is just to be able to peel the upper sheet (6) and the lower sheet (5). For example, a release agent mainly composed of a thermoplastic resin such as urethane resin or polyamide resin, or a nitrified cotton resin or wax can be used.

As a layer constituting the lower sheet (5), a biaxially stretched polyethylene terephthalate film having a thickness of 6 μm to 25 μm and a soft aluminum foil can be suitably used. When the thickness of the biaxially stretched polyethylene terephthalate film and the aluminum foil is less than 6 μm, it is difficult to handle the laminate, and when the lower sheet (5) is peeled off from the container body, a peeling residue occurs. On the other hand, if it exceeds 25 μm, the resulting lid is too stiff and the cost becomes excessive. Moreover, even if both are less than 6 micrometers or it is a case where it exceeds 25 micrometers, it is difficult to obtain the suitability for half-cut processing.

  As the adhesive layer (7) used for laminating the back surface of the paper (22) on which the release agent is printed and the aluminum foil (26), low density polyethylene, linear low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer A thermoplastic resin mainly composed of at least one of a resin, a copolymer resin of ethylene and acid, and a synthetic rubber can be preferably used. Further, as the adhesive layer (7), instead of polyethylene, a wet laminating adhesive, a dry laminating adhesive, a non-solvent laminating adhesive, or a hot melt adhesive may be used.

  The sealant layer (27) may be a single layer or multiple layers, but the innermost surface of the sealant layer has a low density polyethylene, a linear low density polyethylene, an ethylene-vinyl acetate copolymer resin, and an ethylene-methacrylic acid copolymer resin. An easy peel sealant resin layer mainly composed of an acid copolymer resin such as an ethylene-acrylic acid copolymer resin is preferred. In any case, the material of these sealant layers is selected according to the material on the bonding surface side of at least the opening peripheral portion of the adherend container.

  Since the lid | cover material (1) which concerns on this invention is the above structures, when peeling off the upper sheet | seat (6) in order to show a hot water cutting hole (e) with a hot water cutting pull tab (4) The lower sheet (5) is not cut, and the lower sheet (5) of the peeling region (A) is not peeled off from the container body. Hereinafter, based on an Example, the lid | cover material which concerns on this invention is demonstrated concretely.

A laminate having a cross-sectional configuration as shown in FIG. 9 was prepared.
A piece of art paper (basis weight 104.7 g / m ² , thickness 100 μm) is prepared as a paper (22), and the surface is printed with a multicolor gravure printing machine to print characters, patterns, gloss varnishes, etc. (21) Subsequently, a sealing agent (23) and a release agent (8) are applied to the back of one piece of art paper, a partial cut half cut (11) and a pull tab half cut (10) in FIG. Match the pattern printed on the surface with the register so that the area surrounded by the hot-cut hole half-cut (12) is not filled in the area surrounded by the outer edge of (1). The varnish plate was applied by gravure printing with the pattern plate of FIG. The coating amount of the peeling varnish in the halftone dot region (D) was set to be 40% of the coating amount in the other peeling region (A).

  Separately, a biaxially stretched polyethylene terephthalate film 12 μm is prepared as a biaxially stretched film layer (24), and an adhesive (25) is applied to the corona-treated surface of the biaxially stretched polyethylene terephthalate film, and a dry lamination method is used. A soft aluminum foil (26) having a thickness of 9 μm was laminated.

  The back side of the printed piece of art paper is subjected to corona discharge treatment, extruded using a T-die type extrusion laminating machine and extruded low-density polyethylene (thickness 20 μm) as the adhesive layer (7), and biaxially stretched first. A laminate was obtained by laminating a biaxially stretched polyethylene terephthalate film of a laminate of a polyethylene terephthalate film and an aluminum foil by a sandwich lamination method without using an anchor agent.

Next, an ethylene-methacrylic acid copolymer resin (thickness 10 μm) corresponding to the adhesive resin layer (28) is used on the surface of the aluminum foil of the laminate using a T-die type extrusion laminating machine,
Two layers of an ethylene-methacrylic acid copolymer-based easy peel sealant resin (29) (thickness 10 μm) were coextruded on the innermost surface to provide a sealant layer having a total thickness of 20 μm to obtain a laminate.

This laminated body is half-cut with a rotary die cutter so that the blade enters from the sealant layer side to one piece of art paper or to the middle of one piece of art paper. And a pull tab half cut (10).
Furthermore, the rotary die cutter is used to perform half-cut processing so that the blade enters from the pattern printing side of the piece of art paper to the low-density polyethylene of the adhesive layer (7) or to the middle of the low-density polyethylene. A half-cut (11) was provided.
Next, the cover material of Example 1 was obtained by punching out the outer shape of the cover material (1) of FIG.

  A lid material of Example 2 was obtained in the same manner as in Example 1 except that the halftone dot region of the plate to which the peeling varnish was applied had the shape shown in FIG.

  A lid material of Example 3 was obtained in the same manner as in Example 1 except that the halftone dot region of the plate to which the peeling varnish was applied was changed to the shape shown in FIG.

  A lid material of Example 4 was obtained in the same manner as in Example 1 except that the halftone dot region of the plate to which the peeling varnish was applied had the shape shown in FIG.

<Comparative Example 1>
A cover material of Comparative Example 1 was obtained in the same manner as in Example 1 except that the plate on which the peeling varnish was applied was a simple solid plate having no halftone dot area.

<Comparative example 2>
A cover material of Comparative Example 2 was obtained in the same manner as in Example 1 except that the plate on which the peeling varnish was applied was a solid plate having a thickness ratio of 60%. This corresponds to the fact that the peeling region is a halftone dot region over the entire surface.

Prepare 100 pieces of each of the lid materials of Examples 1 to 4 and Comparative Examples 1 to 2, and after filling the expanded polystyrene cup serving as the container body with the contents, the opening is sealed using a cup sealer, and the following Evaluation was performed.
1. Transport evaluation After the packed sample was shrink-wrapped, it was packed in a cardboard box, and this was compliant with JIS Z0200, and logarithmic sweep vibration was performed at a frequency of 1/2 octave or less per minute to confirm the presence or absence of floating.
2. Peeling evaluation Holding the hot water cutting pull tab (4), the upper sheet (6) of the peeling area (A) was peeled off to expose the hot water cutting hole (e). At this time, it was evaluated whether or not the upper sheet (6) could be removed without any problem.

Hereinafter, a comparison result between the example and the comparative example will be described.
The lid materials of Examples 1 to 4 have no hot-water pull tab (4) in the peeling evaluation without causing problems such as floating or spontaneous peeling at the periphery of the hot-water pull tab in transportation evaluation. Even if the upper sheet (6) of the peeling area (A) was peeled off, all could be peeled off without any problem.
On the other hand, in the lid material of Comparative Example 1, in transport evaluation, floating occurred along the peripheral edge of the hot water cutting pull tab (4), particularly along the outer edges 10a to 11a and 10b to 11b, and the floating was formed in the hot water cutting hole. In some cases, the sealability could not be ensured.

  Although the lid material of Comparative Example 2 did not cause any problems in the transportation evaluation, in the peeling evaluation, the paper layer breakage occurred mainly due to the partial peeling half cut (11), and the hot water hole was completely exposed. I couldn't make it happen.

  From the above, the lid material according to the present invention improves the transport resistance without impairing the peeling function that allows the hot water hole (e) to appear easily and stably, and has a sealing property as a container. It was found that it could be secured stably.

  The lid | cover material which concerns on the above embodiment and its modification has been demonstrated as a lid | cover material of food containers, such as instant food. However, the lid according to the present invention is not necessarily limited to this, and after injecting various solutions such as water, hot water, or a catalyst into the container main body and treating the contents with those liquids, Any structure may be used as long as only the liquid appears on the cover member according to the present invention and is discharged through the discharge hole, and is not limited to the type and temperature of the liquid, and the manner of processing the contents.

DESCRIPTION OF SYMBOLS 1 ... Lid material CT ... Container 2 ... Cover body BD ... Container body 3 ... Pull tab for opening OP ... Opening part 4 ... Pull tab for hot water cutting FL ... Flange part DESCRIPTION OF SYMBOLS 5 ... Lower sheet a ... Outer edge 6 ... Upper sheet b ... Inner edge 7 ... Adhesive layer A ... Release area 8 ... Release layer (release agent) B ... Non-release Area 10 ... Half-cut for pull tab C ... Fine rectangular non-peeling area 10a, 10b ... Point on outer edge D ... Halftone dot area 11 ... Half-cut for partial peeling e ... Hot water cutting holes 11a, 11b ... Points on the outer edge O ... Center point 12 ... Half cut for hot water cutting holes PG ... Divided line 20 ... Release interface SH ... Upper sheet piece 21 ..Picture printing 22 ... paper 23 ... stop layer 24 ... biaxially stretched film 25 ... adhesive 26 ... a Miniumu foil 27 ... sealant (layer)
28 ... Adhesive resin layer 29 ... Easy peel sealant layer

Claims (6)

A lid that covers the flange formed along the edge of the opening of the container body in a peelable manner,
A lower sheet that seals the lower surface of the flange portion; and an upper sheet that has an upper surface that forms a surface of a lid member and that has at least a paper layer on the lower surface, the paper layer being laminated on the upper surface of the lower sheet. Consisting of laminates,
A lid body having a size substantially equal to the outer shape of the flange portion and integrally covering the opening and the flange portion; and a lid body integrally extending to the lid body so as to be located outside the flange portion. A pull tab for opening used to separate the liquid from the opening, and a pull tab for hot water used when causing a plurality of hot water cut holes extending integrally with the lid body to discharge liquid from the container body to appear on the lid body And
Crossing the root part of the hot water pull tab, connecting the two points 10a, 10b on the outer edges on both sides of the lid, and having a half cut for the pull tab penetrating the lower sheet from the lower surface of the lower sheet,
In the partial area including the half cut for the pull tab and extending inward of the lid main body, the upper sheet and the lower sheet were laminated so as to be peeled using the release layer printed and formed on the lower surface of the upper sheet as a release interface. Has an exfoliation area,
In the peeling region, a plurality of hot water cut hole half-cuts having a desired shape corresponding to the hot water cut hole and penetrating the lower sheet from the lower surface of the lower sheet are formed according to a desired arrangement, and the plurality of hot water cut holes are further formed. Is formed along the inner peripheral edge of the peeling region so as to surround the half-cut, and a partial peeling half-cut is provided through the upper sheet from the upper surface of the upper sheet,
The half-cut for partial peeling is along the outer peripheral inner edge of the peeling area, starting from a point 11a on the outer edge far from the point 10a when viewed from the pull tab for hot water cutting and starting at a point 11b on the outer edge far from the point 10b. Circulate
A halftone dot region is formed at the inner side of the peeled region excluding a half cut processed portion of the outer edge of the lid material connecting the points 10a and 11a and the points 10b and 11b, respectively.
The halftone dot region is obtained by locally reducing the coating amount of the release agent by using the portion of the printing plate forming the release layer as a halftone dot pattern and partially enhancing the peel strength of the lower sheet and the upper sheet. A lid material characterized by being.   The lid material according to claim 1, wherein the halftone dot region is extended inside the partial cut half cut.   The lid material according to claim 1 or 2, wherein the halftone dot region is extended inwardly of the half cut for the pull tab.   The said halftone dot area | region is cyclically | annularly provided along the inside of the said half cut for pull tabs, and the half cut for partial peeling so that the area | region of the half cut for hot water cutting holes may be enclosed. The lid material described.   5. The application amount of the release agent in the halftone dot region is 30% or more and 90% or less of the application amount of the release agent in the release region other than the halftone dot region. The lid material described.   The lid material according to any one of claims 1 to 5, wherein a release agent-uncoated portion is provided in a central portion of the half cut for the hot water cut hole to form a fine rectangular non-release region. .

Images