JP5447843B2 - Lid material - Google Patents

Description

  The present invention relates to a lid that can be thermally bonded and sealed to a tray or cup-shaped container for packaging instant noodles such as instant noodles, fried noodles, and pasta, and more specifically, from a configuration that does not include a metal foil such as aluminum. The lid material that can be partially peeled off from the container and opened, poured hot water on the instant noodles etc. stored in the container, and then the lid material removed again is restored and the opening is resealed and covered About.

  Conventionally, for instant food containers such as instant noodles, a lid material is used that is opened about half when pouring hot water, and then resealed after pouring hot water. The lid is composed of a multilayer laminate in which a heat-adhesive resin layer that can be thermally bonded to a container in a peelable manner, an aluminum foil having excellent shape retention, and a paper layer that has been printed on the surface are laminated. .

  When cooking instant noodles contained in a container, first, the lid is peeled off about half and the container is opened. At this time, since the lid material is laminated with aluminum foil, the peeled lid material is held in a half-open state, so that hot water can be poured from the opening. After pouring hot water, when the lid is returned to its original state, the lid does not warp, so that the opening of the container can be covered and resealed. Thus, the cover material of the structure which laminated | stacked aluminum foil has the characteristic (henceforth dead hold property) that the shape which can peel the cover material can be maintained, and can be returned to the original state.

  However, the lid member made of a laminate in which aluminum foil is laminated has a problem that a metal detector for inspecting a metal foreign object that may be erroneously mixed in the container body containing the contents cannot be used, In the incineration treatment of the packaging container after use, there has been a problem that the aluminum foil may become an ingot and adhere to the furnace wall or the like of the incinerator. Therefore, in order to solve these problems, the cover material is made of a laminate that does not contain an aluminum foil, and in order to open and reseal the cover material from the container, a cut line is provided on the knob, In addition, a lid material that has been provided with an opening property and a resealability so that a cut line can be locked to the flange of the container at the time of resealing is disclosed (for example, see Patent Document 1).

  In addition, it consists of a laminate that does not contain an aluminum layer, and a surface layer that contains a paper layer, a resin layer, and a sealant layer that has heat-sealing properties are laminated in this order, and is perpendicular to the direction in which the lid is peeled off by picking the opening tab A peeling part that peels off part of the surface layer in a slit shape is provided in a predetermined region substantially parallel to the center line on the rear side of the center line of the lid member, and the resin layer and the paper layer of the peeling part are separated from the peeling layer. A cover material is proposed in which a peeling portion is formed from a region sandwiched between a pair of cut lines provided in the surface layer, and a peeling tab that protrudes outward from the outer edge of the flange is provided at one end of the peeling portion. (For example, refer to Patent Document 2).

  However, a lid made of a laminate in which aluminum foil is not laminated has insufficient dead-holding properties.When opening, it is necessary to hold the lid with one hand while pouring hot water with the other hand. At the time of sealing, it is necessary to hold the re-sealed portion of the lid material by hand or to make the lid material not rebound by crushing the weight. In the case of the lid material described in Patent Document 1, when the lid material is opened, the handle piece is peeled off to a large extent and locked to the flange on the rear side of the container. The operation of pulling away from the flange, moving to the front flange, and re-engagement with the flange is necessary and troublesome.

  In addition, the lid material described in Patent Document 2 is provided with a peeling portion that peels in a slit shape substantially parallel to the center line in a part of the surface layer of the lid material, so that the slit-like portion after peeling is thin. Thus, it becomes easy to bend, an excellent dead hold property is obtained, and there is no troublesome operation as in Patent Document 1 at the time of opening and resealing, and it becomes simple. However, Patent Document 2 states that “after the peeling portion 3 is peeled off from the lid material 1 in a slit shape, the opening tab 2 is picked and the lid material 1 is moved to the flange of the container body 21 until the state shown in FIG. As described in the following, “1) peeling of the peeled portion and (2) opening of the lid material are necessary for opening, which is troublesome for the user. The development of a lid that can be opened by action has been desired.

JP 2001-48220 A JP 2009-241997 A

    In view of the conventional problems as described above, the present invention comprises a laminated body in which an outer lid and an inner lid having a laminated structure that does not include a metal foil layer as a lid material for a cup-shaped container body, and is easy to operate. An object of the present invention is to provide a lid material that can be opened and resealed.

In order to solve the above-mentioned problem, the present invention according to claim 1 is an outer layer having a laminated structure that is thermally bonded to the outer peripheral edge of the cup-shaped container body to seal the cup-shaped container body and does not include a metal foil layer. A lid material comprising a laminate in which a lid and an inner lid are laminated via an adhesive resin layer, and having an opening knob that protrudes outward from the outer peripheral edge of the cup-shaped container body on the outer peripheral edge, The outer lid has a configuration in which at least a paper layer is laminated, the inner lid has a configuration in which a heat-adhesive resin layer is laminated at least on the innermost layer, and the opening lid is gripped by the opening knob. A strip-shaped cutout window portion in which the outer lid is cut out in a direction perpendicular to the direction in which the lid material is peeled off is provided, and a pair of cut lines sandwiching the opening knob are formed in the inner lid, and the cut line One end of the inner lid is the outer peripheral edge of the inner lid, and the other end is the belt-like shape Formed in the vicinity of the lengthwise ends of the cutout window portion, and the other end of the pair of cutout lines is located inside the lengthwise end of the strip-shaped cutout window portion, The lid member is characterized in that a length connecting the other end portions is smaller than a length connecting both ends in the length direction of the band-shaped cutout window portion .

Moreover, the present invention described in claim 2 is the lid member according to claim 1 , further comprising: the opening knob and a hot water hole forming knob protruding outward at a position opposite to the outer peripheral edge, An easy peeling region provided with a release agent layer between the outer lid and the adhesive resin layer is formed in a predetermined region from the hot water hole forming knob to the opening knob, and within the easy peeling region A hot water cut hole cut through the inner lid in the shape of a plurality of hot water cut openings is formed in the hot water cut hole forming knob, and a cut line for forming a hot water cut hole passing through the inner lid is formed inside the hot water cut hole forming knob. It is characterized by that.

  According to the first aspect of the present invention, the cover material has a laminated structure that does not include a metal foil layer such as aluminum, so that a metal foreign object can be inspected for contamination by a metal detector, and the packaging container is incinerated after use. Processing is possible. In addition, a band-shaped cutout window portion is formed by providing a band-shaped cutout window portion in which the outer lid is cut out in a direction perpendicular to the direction in which the lid is peeled by picking the opening knob on the outer lid. Is easy to bend with only the adhesive resin layer and the inner lid, and can be easily folded at the strip-shaped cutout window simply by peeling off the lid material, and can be opened with one action. When the cover member is returned to its original position, the opening of the container can be covered, and the opening and resealability can be obtained with a simple operation.

Further, a pair of tear lines that sandwich the front Symbol opening knob portion is formed in said lid, said one end of the cutoff line is an outer peripheral edge of the inner lid, the length of the other end the strip-shaped notched window section The other end of the pair of cut lines is located inside the lengthwise end of the strip-shaped cutout window, and the other ends of the pair of cut lines are connected to each other. In addition to the above-described effect, the length of the tie is smaller than the length of the two ends in the length direction of the strip-shaped cutout window portion, so that the peeled lid material is more reliably bent at the strip-shaped cutout window portion. And an excellent dead hold property can be obtained.

According to a second aspect of the present invention, the opening knob and the hot water hole forming knob protruding outward are provided at positions opposite to the outer peripheral edge, and the outer lid, the adhesive resin layer, An easy peeling region provided with a release agent layer is formed in a predetermined region from the hot water cut hole forming knob toward the opening knob, and the easy peeling region has a plurality of hot water cut shape. A hot water cut hole cut that penetrates the inner lid is formed, and a hot water cut hole forming cut line that penetrates the inner lid is formed inside the hot water cut hole forming knob. In addition to the above effect, when the lid material is peeled off by picking the knob for forming the hot water cut hole, the outer lid can be easily peeled off from the inner lid in the easy peel area provided with the release agent layer, and the hot water cut hole is used as the inner lid. Can be formed.

BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows 1st embodiment of the cover material concerning this invention, Comprising: (a) is a top view which shows the state which thermally bonded the cover material concerning this invention to the opening part of the container main body, (b) is a cover. It is a reverse view of material. It is the XX sectional view taken on the line in FIG. It is explanatory drawing explaining the opened state of 1st embodiment of the cover material concerning this invention. It is a top view which shows 2nd embodiment of the cover material concerning this invention, Comprising: (a) is a top view which shows the state which thermally bonded the cover material concerning this invention to the opening part of the container main body, (b) is a cover. It is a reverse view of material. It is the YY sectional view taken on the line in FIG. It is explanatory drawing explaining the opened state of 2nd embodiment of the cover material concerning this invention.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view showing a first embodiment of a lid material according to the present invention, in which (a) is a plan view showing a state in which the lid material according to the present invention is thermally bonded to an opening of a container body. ) Is a rear view of the lid member, FIG. 2 is a sectional view taken along line XX in FIG. 1 (a), FIG. 3 is an explanatory diagram for explaining the unsealed state of the first embodiment of the lid member according to the present invention, and FIG. (A) is a top view which shows the state which thermally bonded the lid | cover material concerning this invention to the opening part of a container main body, (b) is a top view which shows 2nd embodiment of the lid | cover material concerning this invention. FIG. 5 is a cross-sectional view taken along line YY in FIG. 1 (a), and FIG. 6 is an explanatory diagram for explaining the unsealed state of the second embodiment of the lid according to the present invention. 1, 1 'is a lid material, 1a is an opening piece, 2 is a cup-shaped container body, 3, 3' is an outer lid, 4 and 4 'are inner lids, 5 is an adhesive resin layer, and 6 is a knob for opening. 7 8 is a tab, 9 is a knob for forming a hot water cut hole, 10 is a hot water cut hole, 20 is a flange, 21 is a pouring spout, 30 is a surface layer, 31 is a paper layer, 32 is a strip-shaped cutout window portion , 32a, 32b are end portions in the length direction of the strip-shaped cutout window portion, 33 is a release agent layer, 40 is an inner lid base material layer, 41 is a heat-adhesive resin layer, 42 and 42 'are cut lines, 42a, 42′a is one end of the cut line, 42b and 42′b are the other end of the cut line, 43 is a cut hole cut line, 44 is a cut line for forming a cut hole, and B is an easy peel area and a non peel area. The boundary, S is the easy peeling region, l ₁ is the length between the other ends of the cut line, and l ₂ is the length between the end portions in the length direction of the strip-shaped cutout window portion.

  1st embodiment of the cover material concerning this invention is as showing in FIGS. 1-3. In the first embodiment of the lid 1 according to the present invention, as shown in FIGS. 1A and 2, for example, a flange 20 is provided on the outer peripheral edge of the opening of the cup-shaped container body 2 having a circular opening on the upper surface. A circular lid 1 is provided so as to cover the opening of the cup-shaped container body 2 so as to cover the opening of the cup-shaped container body 2. The flange 20 of the container body 2 is thermally bonded to seal the cup container body 2. In addition, the heat-bonding part of the lid | cover material 1 and the flange 20 was shown with the oblique line in FIG. The circular lid 1 is provided with an opening knob 6 projecting outward from the outer periphery of the opening of the cup-shaped container body 2 on the outer periphery, and after cooking at a position facing the opening knob 6, the lid A tab 8 for peeling 1 and removing it from the cup-shaped container body 2 is provided protruding outward. The lid 1 is composed of a laminate in which an outer lid 3 and an inner lid 4 having a laminated structure not including a metal foil layer are laminated via an adhesive resin layer 5. In addition, a metal foil layer consists of aluminum, iron, tin, etc. and those alloys.

  As shown in FIG. 1 (a), the outer lid 3 has a strip-shaped notch formed by cutting the outer lid 3 in a direction perpendicular to the direction of peeling the lid material 1 toward the tab 8 by picking the opening knob 6. A window portion 32 is provided, and the adhesive resin layer 5 is directly visible from the strip-shaped cutout window portion 32.

FIG. 1 (b) is a plan view of the lid member 1 as seen from the surface of the inner lid 4. In the inner lid 4, a pair of cut lines 42, 42 are formed in parallel with the opening knob 6 in the direction of opening the lid 1. The cut line 42 has one end 42 a that is the outer peripheral edge of the inner lid 4, and the other end 42 b that is formed in the vicinity of the end portions 32 a and 32 b in the length direction of the strip-shaped cutout window portion 32. For example, a V-shaped notch 7 sharing one side with the cut line 42 is formed by cutting out the cover material 1 at one end 42a of the cut line 42. The other ends 42b, 42b of the pair of cut lines 42, 42 are located inside the lengthwise ends 32a, 32b of the strip-shaped cutout window 32, and the other ends 42b of the pair of cut lines 42, 42 are provided. it is preferable that the end portion between the length l ₁ connecting 42b to each other is smaller than the end between the length l ₂ connecting the strip-shaped notch length direction of the end portion 32a of the window 32, 32 b. That is, by making the relationship satisfying l ₁ <l ₂ , the unsealed piece 1a (see FIG. 3) of the lid member 1 peeled off as described later can be reliably bent at the strip-shaped cutout window 32, Excellent dead hold property can be obtained. Further, it is preferable that the other end portion 42b of the cutoff line 42 is provided with a slight gap from the strip-shaped cutout window portion 32. Care must be taken because the gas barrier property of the lid member 1 is likely to be impaired when the strip-shaped cutout window portion 32 and the other end portion 42b come into contact with each other. Further, the length l ₁ between the other ends of the pair of cut lines can be arbitrarily formed as long as it does not become larger than the length l ₂ between the end portions in the length direction of the strip-shaped cutout window portion. It preferred because better to the length close to the edge portion between the length l ₂ of the length direction of the window portion is liable dead hold property is obtained more excellent. The length l ₂ between the end portions in the longitudinal direction of the strip-shaped cutout window portion takes into consideration the size of the opening of the cup-shaped container body 2 and the distance between the pair of cut lines 42, 42 formed in the lid member 1. Determined. However, it is preferable to form the strip-shaped cutout window portion 32 so as not to straddle the thermal bonding portion with the flange 20 because good thermal adhesion between the lid member 1 and the cup-shaped container body 2 is obtained.

  FIG. 2 is a cross-sectional view taken along the line XX in FIG. 1 (a), and shows a state in which the lid 1 according to the first embodiment is attached by being thermally bonded to the flange 20 of the cup-shaped container body 2 having an opening. It is a figure, Comprising: The laminated structure of the cover material 1 is shown. As shown in FIG. 2, the outer lid 3 is composed of a paper layer 31, and is printed on the outer surface of the paper layer 31 (not shown). Further, the outer lid 3 may have a configuration in which a surface layer is laminated on the outer surface side of the paper layer 31. In this case, printing is performed on either the paper layer 31 or the surface layer. The inner lid 4 has a configuration in which an inner lid base material layer 40 and a thermoadhesive resin layer 41 are laminated. The lid 1 is made of a laminate in which a paper layer 31 of the outer lid 3 and an inner lid base material layer 40 of the inner lid 4 are laminated via an adhesive resin layer 5. The outer lid 3 is provided with a strip-shaped cutout window portion 32 in which the outer lid 3 is cut out in a direction perpendicular to the direction in which the opening knob 6 is picked and the lid material 1 is peeled off.

  When the lid 1 is required to have light shielding properties due to the contents accommodated in the cup-shaped container body 2, the outer lid 3 can be laminated with a light shielding layer. The light shielding layer is a paper layer or surface layer using a white ink mainly composed of titanium oxide or the like, a black ink mainly composed of carbon black or the like, a gray ink mainly composed of aluminum paste, or a mixed ink thereof. Provided. In addition, the shape of the lid | cover material 1 is not limited to circular shape, It is arbitrary and can be made into square shape, an ellipse shape, etc., and is suitably selected by the shape of the opening part of a cup-shaped container main body.

Next, the usage method of the package body in which the lid member 1 of the first embodiment is thermally bonded to the opening of the cup-shaped container body 2 will be described with reference to FIGS. 2 and 3.
When the opening knob 6 shown in FIG. 2 is picked up and pulled up, the lid material 1 is peeled off from the flange 20 of the cup-shaped container body 2, and the lid material 1 is torn along the cut line 42 from the notches 7 and 7. Then, when the opening piece 1a formed by tearing at the strip-shaped notch window portion 32 is bent toward the tab 8, the pouring port 21 is formed in the cup-shaped container body 2 as shown in FIG. The band-shaped cutout window 32 is thin only by the adhesive resin layer 5 and the inner lid 4 and can be easily bent, and the open piece 1a is maintained in its original state without returning to its original state. Since holdability can be obtained, hot water or the like can be poured into the cup-shaped container body 2 with confidence from the pouring port 21.

  After that, when the unsealed piece 1a of the lid member 1 that is bent again is returned to the original state (not shown), it becomes a flat state as shown in FIG. Good resealability can be obtained. By forming the strip-shaped cutout window portion 32 in this way, even in a laminated structure that does not include a metal foil layer such as an aluminum foil, excellent dead hold properties are exhibited, and opening and resealability can be achieved with a simple operation. It can be set as the provided cover material.

  After the lid is closed, the required time has elapsed and the contents are cooked. Then, the tab 8 is picked with a finger, and the lid 1 is peeled off from the flange 20 of the cup-shaped container body 2 to remove the cooked contents. Can do.

  A second embodiment of the lid according to the present invention is as shown in FIGS. As shown in FIGS. 4A and 5, the lid member 1 ′ of the second embodiment according to the present invention is provided at the periphery of the opening of the cup-shaped container body 2 having a circular opening on the upper surface, for example. A circular lid member 1 ′ is placed on the flange 20 so as to cover the opening, and is thermally sealed and sealed by the flange 20 of the cup-shaped container body 2. The hatched portion in FIG. 4A indicates the heat bonding portion between the lid member 1 ′ and the flange 20. The circular lid member 1 'is composed of an outer lid 3' and an inner lid 4 'having an opening knob 6 projecting outward and a hot water hole forming knob 9 at positions opposite to the outer peripheral edge. The outer lid 3 ′ and the inner lid 4 ′ having a laminated structure not including the metal foil layer are made of a laminated body in which the adhesive resin layer 5 is laminated.

  The lid member 1 ′ is a predetermined region in which an easy peeling region S having a release agent layer 33 between the outer lid 3 ′ and the adhesive resin layer 5 is directed from the hot water hole forming knob 9 toward the opening knob 6. Is formed. Areas other than the easy peeling area S are non-peeling areas. In the easy peeling region S, a plurality of hot water cut-shaped inner lids 4 ′ and hot water cut holes 43 penetrating through the adhesive resin layer 5 are formed. In this way, a cut line 44 for forming a hot water cut hole penetrating the inner lid 4 ′ and the adhesive resin layer 5 is formed. At the boundary B between the easy peeling region S and the adjacent non-peeling region, the outer lid 3 ′ is provided with an outer lid tear line made of a perforation or a half cut.

  As shown in FIG. 4 (a), the outer lid 3 'has an outer lid 3 in a direction perpendicular to the direction in which the opening knob 6 is picked and the lid material 1' is peeled off from the hot water hole forming knob 9 side. A band-shaped cutout window portion 32 with a notch is provided, and the adhesive resin layer 5 is directly visible from the band-shaped cutout window portion 32. The strip-shaped cutout window 32 is provided slightly closer to the opening knob 6 than the center line of the lid 1 ′ (indicated by a one-dot chain line in FIG. 4).

  FIG. 4B is a plan view of the lid member 1 ′ as seen from the surface of the inner lid 4 ′. The inner lid 4 ′ is formed with a pair of cut lines 42 ′ and 42 ′ with the opening knob 6 sandwiched in the direction of opening the lid 1 ′. The cut line 42 'is a bent line having one end 42'a as the outer peripheral edge of the inner lid 4', starting from one end 42'a and ending at the other end 42'b. The cut line 42 ′ starts from one end 42 ′ a and extends in a direction from the opening knob 6 toward the hot water hole forming knob 9, and then bends and extends from the opening knob 6 across the portion corresponding to the thermal bonding portion. It extends along the inner edge of the portion corresponding to the thermal bonding portion in the direction away from it, and then bends again and extends from the opening knob 6 to the other end 42'b in the direction toward the hot water hole forming knob 9. Yes. The other end 42 ′ b is in the vicinity of the end portions 32 a and 32 b in the length direction of the strip-shaped cutout window portion 32. For example, a V-shaped notch 7 sharing one side with the cut line 42 ′ is formed at one end 42 ′ a of the cut line 42 ′ by cutting out the lid material 1 ′. The other ends 42 ′ b and 42 ′ b of the pair of cut lines 42 ′ and 42 ′ are inside the lengthwise ends 32 a and 32 b of the strip-shaped cutout window 32, and the pair of cut lines 42 ′ and The length between the end portions 42′b and 42′b connecting the other end portions 42 ′ is made smaller than the length between the end portions 32a and 32b connecting the lengthwise ends 32a and 32b of the strip-shaped cutout window portion 32. It is preferable as in the first embodiment.

  FIG. 5 is a cross-sectional view taken along line YY in FIG. 4 (a), and shows a state in which the lid 1 'of the second embodiment is attached by thermal bonding to the flange 20 of the cup-shaped container body 2 having an opening. A cross-sectional view is shown. As shown in FIG. 5, the outer lid 3 ′ is formed by laminating a surface layer 30 made of a biaxially stretched film and a paper layer 31 in order through an adhesive 34 from the outer surface side. A release agent layer 33 is laminated in a predetermined area from the forming knob 9 toward the opening knob 6 to form an easy peeling area S. Although not shown, printing is usually performed on the outer surface of the paper layer 31 or the inner surface of the surface layer 30. Further, the outer lid 3 ′ may have a configuration in which the surface layer 30 is omitted. The inner lid 4 ′ has a configuration in which an inner lid base material layer 40 and a thermal adhesive resin layer 41 are laminated. The lid material 1 ′ is composed of a laminate in which the paper layer 31 and the release agent layer 33 of the outer lid 3 ′ and the inner lid base material layer 40 of the inner lid 4 ′ are laminated via the adhesive resin layer 5. In the region S, it is possible to peel between the release agent layer 33 and the adhesive resin layer 5. Further, the outer lid 3 ′ is provided with a strip-shaped cutout window portion 32 in which the outer lid 3 ′ is cut out in a direction orthogonal to the direction in which the opening knob 6 is picked and the lid material 1 ′ is peeled off. .

Next, with reference to FIGS. 5 and 6, a method of using the package in which the lid 1 ′ of the second embodiment is bonded to the opening of the cup-shaped container body 2 will be described.
Although the lid member 1 'of the second embodiment is not shown in the figure, the lid member 1' is peeled off from the flange 20 of the cup-shaped container main body 2 when the opening knob 6 is picked up with a finger and pulled up as in the first embodiment. The lid member 1 ′ is opened while being torn along the cut line 42 ′ from the notches 7, 7, and the opening piece formed by tearing at the strip-shaped notch window portion 32 is bent toward the hot water cut hole forming knob 9 side. A pouring opening is formed in the cup-shaped container body 2, and hot water or the like can be poured into the cup-shaped container body 2 from the pouring port. The effect by the dead hold property which the strip | belt-shaped notch window part 32 show | plays is the same as that of 1st embodiment, and abbreviate | omits description.

  Next, a method of forming a hot water cutting hole after the lid is closed and the contents are reconstituted after a required time has elapsed will be described with reference to FIGS. From the state shown in FIG. 5, when the lid material is peeled by picking the hot water cut hole forming knob 9 with a finger, the easy peeling region of the paper layer 31 of the outer lid 3 ′ at the cut line 44 for hot water cut hole formation. Only the outer lid 3 ′ is peeled by peeling between the release agent layer 33 formed on S and the adhesive resin layer 5. When the peeling further proceeds and reaches the hot water cut hole 43 that penetrates the inner lid 4 ′ and the adhesive resin layer 5, the inner part surrounded by the hot water cut hole 43 is pulled out in a state of being bonded to the outer lid 3 ′. As shown in FIG. 6, the hot water cut hole 10 is formed, and when reaching the boundary B between the easy peeling region S and the non-peeling region that does not have the adjacent release agent layer, the peeling stops and is formed on the boundary B. Cut off the peeled outer lid along the outer lid tear line (not shown). The part where the peeled outer lid is removed is exposed as the inner lid 4 ′ is thermally bonded to the opening of the cup-shaped container body 2, and a hot water cutting hole 10 is formed there. The hot water can be cut by directing the hot water hole 10 downward. As described above, the lid material 1 ′ of the second embodiment is suitable for a lid material used for a container for packaging contents to be subjected to a hot water draining operation after reconstitution with hot water such as fried noodles and pasta.

  Next, materials and forming methods used for each layer constituting the lid member 1, 1 'of the present invention will be described.

  First, examples of the surface layer 30 constituting the outer lid of the lid material of the present invention include biaxially stretched and uniaxially stretched films such as polyester, nylon, and polypropylene. The thickness is 6 μm to 40 μm.

As the paper layer 31 constituting the outer lid of the lid material of the present invention, single-sided coated paper or double-sided coated paper having a basis weight of 50 to 130 g / m ² excellent in printability is preferable.

  Examples of the release agent for forming the release agent layer 33 include nitrified cotton-based, polyamide-based, polyester-based, acrylic-based, urethane-based, and alkyd-based resins. These may be used alone or in combination to form a solution. It can be part-coated by a processing method such as gravure printing or flexographic printing to form the release agent layer 33 in the easy release region S. Easy release properties can be adjusted by mixing the release agent with wax or silicon as an additive. In addition, an undercoat layer is provided between the release agent layer 33 and the paper layer 31 using, for example, a sealing agent that is a single or mixed resin such as nitrified cotton, polyester, acrylic, urethane, or alkyd. May be. In particular, it is preferable when the release agent layer 33 is provided on the non-coated surface of single-side coated paper. Further, the surface of the paper layer 31 to be laminated with the adhesive resin layer 5 may be coated with an anchor coating agent such as isocyanate, polyethyleneimine, organic titanate, or butadiene, or may be subjected to surface treatment such as corona discharge treatment. Thus, the adhesive strength between the paper layer 31 in the non-peeling region and the adhesive resin layer 5 can be increased.

  The outer lid 1, 1 ′ can be laminated on the surface layer 30 and the paper layer 31 using a known lamination method such as a dry lamination method, an extrusion method, or a wet lamination method.

  Examples of the adhesive resin layer 5 for bonding the outer lid and the inner lid include thermoplastic resins such as polyethylene, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / methacrylic acid copolymer, ionomer, and polypropylene. These can be used by hot melt extrusion, and the outer lid and the inner lid are laminated by an extrusion method. In addition to this, an adhesive resin layer 5 can be formed by roll coating, gravure coating, kiss coating or the like using an emulsion adhesive or dry laminating adhesive, and lamination can be performed by wet lamination or dry lamination, but an extrusion method with high productivity is preferable.

  As the inner lid base material layer 40 constituting the inner lids 4 and 4 ′, for example, a polyester film having a thickness of 6 to 25 μm, a nylon film having a thickness of 12 to 25 μm, a polypropylene film having a thickness of 15 to 25 μm, etc. A stretched film is mentioned. The inner lid 4, 4 ′ is preferably a flexible state with no waist in order to exhibit dead hold properties, and the thickness of the inner lid base material layer 40 is more preferably 15 μm or less.

  As the heat-adhesive resin layer 41 laminated on the innermost layer of the inner lids 4 and 4 ′, an ethylene / acrylic acid copolymer or an ethylene / methacrylic acid copolymer that can be melted by heat and extruded and laminated is mainly used. A resin as a component can be preferably used. The heat-adhesive resin layer 41 may be laminated directly on the surface of the inner lid base material layer 40 by extrusion lamination, or may be laminated via an extruded polyethylene layer. The heat-adhesive resin layer 41 can also be made of low-density polyethylene, linear low-density polyethylene, ethylene / vinyl acetate copolymer, or a resin obtained by mixing polystyrene, polybutene, or the like with the above resin. As 10 to 25 μm.

  Next, the present invention will be described in more detail with reference to examples.

A predetermined pattern was formed by gravure printing on a coated surface of one-side coated paper 79.1 g / m ² using urethane gravure ink. Next, a polyester-isocyanate adhesive was applied to the corona-treated surface using a biaxially stretched polyethylene terephthalate film (PET) having a thickness of 12 μm and subjected to a single-sided corona treatment. Were bonded by a dry lamination method (DL) to prepare an outer lid sheet having a configuration of <PET / DL / pattern printing / paper>. Next, register the pattern printing using a punching machine equipped with a rotary die cutter equipped with a punching die having a cutting edge with a predetermined band-shaped cutout window while rewinding the winding of the outer lid sheet. A band-shaped cutout window was formed at a predetermined position by punching from the PET surface and wound up.

Next, by using PET 12 μm for the inner lid base material layer and low-density polyethylene (PE) for the adhesive resin layer, an isocyanate anchor agent (AC) is applied to one surface of PET 12 μm by the extrusion method, Sandwich lamination was performed while thermally melting PE having a thickness of 15 μm between the outer cover sheet and the paper layer surface on which the notch window portion was formed.
Next, using ethylene-methacrylic acid copolymer (EMAA) for the heat-adhesive resin layer, 15 μm thick PE melted through an isocyanate anchor agent (AC) is laminated on the other surface of PET 12 μm. Further, 15 μm thick EMAA melted on the PE surface was laminated to produce an inner lid sheet having a structure of <PET / PE / EMAA> and <PET 12 μm / DL / pattern printing / paper 79.1 g / m ² / PE 15 μm / AC / PET 12 μm / AC / PE 15 μm / EMAA 15 μm> was prepared.

  Thereafter, a half-cut that penetrates the inner lid and the adhesive resin layer from the EMAA surface with a punching machine equipped with a rotary die cutter having a cutting die having a predetermined pair of cutting lines for winding the lid sheet. A predetermined pair of cut lines were formed. Then, the cover material 1 shown in FIG. 1 was produced by cutting and punching.

Easily print on a coated surface of 79.1 g / m ^{2 on} one side using urethane gravure ink and register it on the non-coated surface and use nitrified cotton / polyamide gravure ink. A release agent layer was partially printed on the release area. The printing method was a double-sided printing on a single-side coated paper using a gravure printing machine. Next, a polyester-isocyanate adhesive was applied to the corona-treated surface using a biaxially stretched polyethylene terephthalate film (PET) having a thickness of 12 μm and subjected to a single-sided corona treatment. Were laminated by a dry lamination method (DL) to prepare an outer lid sheet having a release agent layer having a configuration of <PET / DL / pattern printing / paper / release agent layer>. Next, while rewinding the winding of the outer lid sheet, using a punching machine equipped with a rotary die cutter having a predetermined strip-shaped cutout window and a cutting die having a cutting edge of the outer lid cutting line, pattern printing or A strip-shaped cutout window was formed at a predetermined position by punching from the PET surface in register with the release agent layer, and a half-cut outer lid cut-out line was formed and wound.

Next, by using PET 12 μm for the inner lid base material layer and low-density polyethylene (PE) for the adhesive resin layer, an isocyanate anchor agent (AC) is applied to one surface of PET 12 μm by the extrusion method, Sandwich lamination was performed while thermally melting PE having a thickness of 15 μm between the notch window portion and the release agent layer surface of the outer lid sheet on which the outer lid tear line was formed.
Next, using ethylene-methacrylic acid copolymer (EMAA) for the heat-adhesive resin layer, 15 μm thick PE melted through an isocyanate anchor agent (AC) is laminated on the other surface of PET 12 μm. Further, 15 μm thick EMAA melted on the PE surface was laminated to produce an inner lid sheet having a structure of <PET / PE / EMAA> and <PET 12 μm / DL / pattern printing / paper 79.1 g / m ² / release agent layer / PE 15 μm / AC / PET 12 μm / AC / PE 15 μm / EMAA 15 μm>

  EMAA surface with a punching machine equipped with a rotary die cutter equipped with a predetermined die-cutting line, a hot-cut hole cut line and a cut-off line forming cut line for winding the lid sheet with hot-water cut hole A half cut that penetrates the inner lid and the adhesive resin layer was applied to form a predetermined pair of cut lines, hot water cut hole cuts, and hot water cut hole forming cut lines. Thereafter, cutting and punching were performed to produce a lid material 1 ′ with a hot water cut hole shown in FIG. 4.

  Samples were prepared by thermally bonding the lid materials prepared in Example 1 and Example 2 above to the opening of a polystyrene foam container having a circular opening. With respect to the test sample using the lid material of Example 1, as shown in FIG. 3, when the opening knob 6 is pulled up, the lid material first peels off from the foamed polystyrene container, and the lid material tears along the tear line 42. Opening piece 1a of the lid material peeled off when folded at the strip-shaped cutout window portion 32 can be kept in a bent state without returning to the original due to the dead hold property of the strip-shaped cutout window portion, and has a good opening property. As a result, hot water could be easily poured into the cup-shaped container body 2 from the pouring port 21. After that, when the folded open piece was returned to its original state, it became flat and could be easily closed, and maintained as it was during reheating and cooking, and good resealability was obtained. The lid material produced in Example 2 also had the same results as the lid material produced in Example 1, and good openability and resealability were obtained.

DESCRIPTION OF SYMBOLS 1, 1 'Lid material 1a Opening piece 2 Cup-shaped container main body 3, 3' Outer lid 4, 4 'Inner lid 5 Adhesive resin layer 6 Opening knob 7 Notch 8 Tab 9 Hot water hole forming knob 10 Hot water cutting Hole 20 Flange 21 Pouring port 30 Surface layer 31 Paper layer 32 Strip-shaped notch window portion 32a, 32b End portion in the length direction of the strip-shaped notch window portion 33 Release agent layer 40 Inner lid base material layer 41 Thermal adhesive resin Layer 42, 42 'Cut line 42a, 42'a One end of cut line 42b, 42'b The other end of cut line 43 Hot-cut hole cut 44 Hot-cut hole forming cut line B Boundary between easy peel area and non-peel area S Easy peel region l ₁ Length between the other ends of the cut line l ₂ Length between the ends of the strip-shaped cutout window in the length direction

Claims (2)

From a laminate in which an outer lid and an inner lid having a laminated structure not including a metal foil layer are laminated via an adhesive resin layer, which is thermally bonded to the outer peripheral edge of the cup-like container body and sealed. It is a lid member provided with an opening knob that protrudes outward from the outer peripheral edge of the cup-shaped container body on the outer peripheral edge,
The outer lid has a configuration in which at least a paper layer is laminated, and the inner lid has a configuration in which a heat-adhesive resin layer is laminated at least on the innermost layer,
The outer lid is provided with a strip-shaped notch window portion in which the outer lid is notched in a direction perpendicular to a direction in which the opening knob is picked and the lid material is peeled off .
A pair of cut lines sandwiching the opening knob is formed in the inner lid, one end of the cut line is the outer peripheral edge of the inner lid, and the other end is in the length direction of the strip-shaped cutout window section. A length formed in the vicinity of the end portion, the other end of the pair of cut-out lines being inside the end portion in the length direction of the strip-shaped cutout window portion, and connecting the other ends of the pair of cut-out lines Is smaller than the length connecting both ends of the strip-shaped cutout window in the length direction . There is an easy peeling region provided with the opening knob and a hot water hole forming knob protruding outward at a position opposite to the outer peripheral edge, and a release agent layer between the outer lid and the adhesive resin layer. The hot water cut hole forming hole is formed in a predetermined region from the hot water cut hole forming knob toward the opening picking portion, and a plurality of hot water cut hole-shaped cuts are formed in the easy peeling region. 2. The lid material according to claim 1 , wherein a cut line for forming a hot water cut hole penetrating the inner lid is formed inside the knob for forming the hot water cut hole .

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