JP2013082464A - Lid material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid material having a rim with good texture.SOLUTION: A band-shaped rim region 10 including an outer rim of the lid material 3 is embossed. An opening tab 4 to be gripped when peeled from a cup container 2 is provided on a part of the rim part of the lid material 3. On a part opposite the opening tab 4 in the rim part of the lid material 3, a partial peel-off part 9 for allowing only a part of the surface layer of the lid material 3 to be peeled-off is formed by providing a peel-off tab 5, a half cut 6 formed on the upper layer of the lid material 3 so as to partition a part of the region connected to the peel-off tab 5, and a half cut 8 formed on the lower layer of the lid material 3 so as to partition the peel-off tab 5 from the other part.

Description

  The present invention relates to a lid member for sealing an opening of a cup container.

  A cup container having an opening sealed with a sheet-like lid material is widely used as a container for packaging foods such as instant noodles, instant soups, and confectionery. Many of the lid materials for sealing the opening of such a cup container are formed of a laminated sheet including a resin layer and a metal foil. In addition, the shape of the lid material has been devised according to the purpose of use, and it has been proposed to give various functions by forming cuts and half-cut lines in the lid material. (For example, see Patent Documents 1 to 3).

JP 2009-73562 A JP 2010-89805 A Japanese Patent Application Laid-Open No. 2010-1003008

  The lid material made of the laminated sheet described above is excellent in strength and function, but has a problem that the touch is not so good. When an operator or consumer who wraps food or the like touches the periphery of the lid, the lid feels uncomfortable and sometimes feels painful. In view of such a situation, depending on various conditions such as a contact angle and a contact speed with respect to the periphery of the lid member, it is impossible to deny the possibility that fingers and the like are cut by the lid member.

  Therefore, an object of the present invention is to provide a lid member having a good touch at the peripheral edge.

  The present invention relates to a lid member for sealing an opening of a cup container, and is characterized in that embossing is performed on a belt-like peripheral region including an outer peripheral edge of the lid member.

  According to the present invention, since the smoothness of the outer peripheral edge is intentionally reduced by the embossing formed in the band-shaped region including the outer peripheral edge of the lid material, the lid material does not give a sense of biting into fingers. A lid material with excellent touch can be realized.

A perspective view of a packaging container using a lid according to an embodiment Top view of the lid shown in FIG. The figure seen from the III-III line shown in FIG. The figure which shows the cover material which concerns on a 1st modification. The figure which shows the cover material which concerns on a 2nd modification Schematic showing the test method of the cutability evaluation test

  FIG. 1 is a perspective view of a packaging container using a lid according to the embodiment.

  The packaging container 1 is used for packaging instant noodles, and includes a cup container 2 and a lid 3 that seals the opening of the cup container 2. An opening tab 4 for gripping at the time of peeling from the cup container 2 is provided on a part of the peripheral edge of the lid member 3. The lid | cover material 3 which concerns on this embodiment can be utilized for various packaging containers, such as instant food, confectionery, and dairy products. In particular, the lid member 3 according to the present embodiment is suitable for a packaging application of contents that require work such as once hot water is put into the cup container 2 and hot water refrigeration cooking is performed, such as instant fried noodles. . When it is necessary to discharge the hot water poured into the cup container 2 as in the case of instant fried noodles, a partial peeling portion 9 is provided in a part of the lid 3. As shown in FIG. 1, the partial peeling portion 9 divides a separation tab 5 located at a portion facing the opening tab 4 in a peripheral portion of the lid member 3 and a partial region connected to the separation tab 5. A half cut 6 formed in the upper layer of the lid member 3 and a half cut 8 formed in the lower layer of the lid member 3 so as to partition the peeling tab 5 from other parts are provided, and the surface layer of the lid member 3 It is formed by making only a part of the peelable. A plurality of circular half-cuts 7 are formed in the lower layer of the partial peeling portion 9. By providing these half cuts 7, when the partial peeling part 9 is peeled, a plurality of round holes for hot water cutting appear.

The lid member 3 is formed by punching a sheet material made of any one of paper, resin film, and metal foil or a laminate, and has an outer shape corresponding to the opening of the cup container 2. The paper, for example, can be suitably used an art paper having a basis weight of ^{50g / m 2 ~150g / m 2} . An example of the metal foil is an aluminum foil. As the resin film, a polyethylene terephthalate (PET) film, a low density polyethylene (LDPE) film, a biaxially stretched polyethylene (OPE) film, and the like can be suitably used, but are not limited thereto. As the layer structure of the laminate, for example, PET / paper / PE / Al / sealant, paper / PE / Al / sealant, PET / paper / PE / OPE / Al / sealant, paper / PET / PE / PET / Al / Examples thereof include a sealant, PET / paper / PET / sealant, and paper / PET / sealant. The laminate may include an adhesive layer for bonding the layers, an ink layer for printing a release layer, a pattern, and the like. Moreover, when the gas barrier property is calculated | required for the cover material 3, the transparent vapor deposition film which provided inorganic vapor deposition films, such as a metal foil or a resin film, aluminum oxide (alumina), silicon oxide (silica), is contained in a layer structure. . In addition, it is preferable that the total thickness of the sheet | seat material which comprises the cover material 3 shall be the range of 50 micrometers-1 mm.

  FIG. 2 is a plan view of the lid shown in FIG. 1, and FIG. 3 is a view taken along the line III-III shown in FIG.

  The lid member 3 is characterized in that embossing is performed on a belt-like peripheral region 10 including an outer peripheral edge (a hatched portion in FIG. 2). In the example of FIG. 3, embossing is performed so as to wave in the thickness direction of the lid member 3.

  FIG. 4 is a diagram showing a lid according to the first modification, and FIG. 5 is a diagram showing a lid according to the second modification.

  Moreover, instead of processing the peripheral region 10 into a wave shape as in the example of FIG. 3, as shown in FIG. 4, a plurality of convex portions that protrude toward the outer surface side of the lid member 3 are formed. So-called “lifting” processing may be performed, or as shown in FIG. 5, so-called “lifting” processing may be performed in which a plurality of concave portions that are recessed toward the inner surface side of the lid member 3 are formed.

  In addition, the shape of embossing is not necessarily limited to the example shown in FIGS. 3-5, A various shape is employable.

  Here, in the embossing of the peripheral region 10, the thickness t of the embossed peripheral region 10 is 0.2 mm or more, and the pitch p of the protrusions or recesses formed by the embossing is 0.2 mm or more. This is performed so that the width of the region 10 is 0.5 mm or more. By embossing so as to have such dimensions, the outer peripheral edge portion of the lid member 3 is roughened, and the smoothness is intentionally reduced. As a result, when the outer peripheral edge portion of the lid material 3 is touched, the lid material 3 does not give a feeling that the lid material 3 bites into fingers, and the lid material 3 excellent in touch can be realized.

  The lid member 3 can be manufactured by embossing a sheet material as a material and then punching it into a desired shape using a punching die. However, in the so-called “bush punching” in which a plurality of embossed sheet materials are stacked and punched at a time, the embossing may be crushed by the overlapping of the sheet materials. Therefore, “Thomson punching”, which punches one sheet at a time from the embossed sheet material, and “Rotary cut”, which punches continuously from a long sheet material using a rotary mold. It is preferable to employ a manufacturing method such as “processing” in which the sheet material is punched without overlapping.

  The outer shape of the lid member of the present invention is not particularly limited, and can be appropriately selected according to the shape of the opening of the cup container. Examples of the outer shape of the lid member of the present invention include a substantially oval shape and a polygonal shape such as a quadrangle in addition to the above-described substantially circular shape. Further, the size of the lid member is not particularly limited, and can be appropriately selected according to the size of the opening of the cup container in consideration of the sealing property and appearance of the opening and the lid member.

  Further, in this embodiment, a partial peeling portion for discharging liquid is provided in a part of the lid material, but the present invention is similarly applied to a lid material having no partial peeling portion to emboss the outer peripheral edge portion. Processing may be provided.

  Further, when a partial peeling portion for discharging liquid is provided in a part of the lid material as in this embodiment, the shape, size, and number of holes formed in the lower layer of the partial peeling portion are not particularly limited, and the contents and It can set suitably according to a use.

The lid materials according to the following Examples 1 and 2 and Comparative Examples 1 to 4 are polyethylene terephthalate (12 μm) / paper (weighing 104.7 g / m ² ) / peeling varnish / polyethylene in this order from the outer side when packaging It was prepared using a sheet material having a layer structure of (20 μm) / polyethylene terephthalate (12 μm) / aluminum (9 μm) / extruded sealant (20 μm). The total thickness of the sheet material was 170 to 180 μm. The shape of the lid material was as shown in FIG. 2, and the diameter of the substantially circular portion was 180 mm.

Example 1
The lid material according to Example 1 was subjected to wavy embossing (FIG. 3) in the peripheral region. The thickness of the embossed peripheral area (the hatched area in FIG. 2) is 0.5 mm, the pitch of the convex portions formed by embossing is 0.5 mm, and the width of the peripheral area is 0.5 mm. .

(Example 2)
The lid according to Example 2 was subjected to a raised embossing process (FIG. 4) in the peripheral area. The thickness of the embossed peripheral area (the hatched area in FIG. 2) is 0.5 mm, the pitch of the convex portions formed by embossing is 0.5 mm, and the width of the peripheral area is 0.5 mm. .

(Comparative Example 1)
The lid material according to Comparative Example 1 was subjected to wavy embossing (FIG. 3) in the peripheral region. The thickness of the embossed peripheral area (the hatched area in FIG. 2) is 0.1 mm, the pitch of the protrusions formed by embossing is 0.5 mm, and the width of the peripheral area is 0.5 mm. .

(Comparative Example 2)
The lid material according to Comparative Example 2 was subjected to wavy embossing (FIG. 3) in the peripheral region. The thickness of the embossed peripheral area (the hatched area in FIG. 2) is 0.2 mm, the pitch of the convex portions formed by embossing is 0.1 mm, and the width of the peripheral area is 0.5 mm. .

(Comparative Example 3)
The lid material according to Comparative Example 3 was subjected to wavy embossing (FIG. 3) in the peripheral region. The thickness of the embossed peripheral area (the hatched area in FIG. 2) is 0.5 mm, the pitch of the convex portions formed by embossing is 0.5 mm, and the width of the peripheral area is 0.1 mm. .

(Comparative Example 4)
As the lid material according to Comparative Example 4, a material in which the peripheral region was not embossed was produced.

(Test method)
In order to evaluate the touch of the peripheral part of a lid | cover material, the cut property test using the commercially available enteric sausage was done about the lid | cover material which concerns on Examples 1, 2 and Comparative Examples 1-4. The test method will be described with reference to FIG.

  FIG. 6 is a schematic diagram illustrating a test method for a cut property evaluation test.

First, the sample which cut | disconnected the cover material which concerns on Examples 1, 2 and Comparative Examples 1-4 in the strip | belt shape of width 30mm was produced. The prepared sample was sandwiched and fixed so that the maximum exposure height from the chuck was 3 mm. The intestinal sausage was scanned in the direction indicated by the arrow in the figure at a speed of 300 mm / min while maintaining a distance of 2 mm from the chuck. The intestinal sausage after scanning was observed with the naked eye to confirm the presence or absence of cuts. The test was performed 10 times for each example and each comparative example. Table 1 shows the number of incisions in the intestinal sausage.

  As shown in the results of Table 1, in the embossed lid materials of Examples 1 and 2, no cuts occurred in the intestinal sausage, whereas in the lid materials of Comparative Examples 1 to 4, cuts occurred. From these test results, if the cover material is embossed in the peripheral area according to the specifications of Examples 1 and 2, the touch when the finger touches the peripheral edge of the cover material when touching the peripheral edge of the cover material Is soft and has a good touch.

  The lid | cover material of this invention can be utilized widely as a lid body for sealing the opening part of a cup container, and can be conveniently used especially as a lid body of the cup container which packages foodstuffs, such as instant noodles and confectionery.

DESCRIPTION OF SYMBOLS 1 Packaging container 2 Cup container 3 Cover material 10 Peripheral area | region

Claims (2)

In the lid for sealing the opening of the cup container,
An embossing process is performed on a belt-like peripheral region including an outer peripheral edge of the cover material. The thickness of the embossed peripheral region is 0.2 mm or more,
The pitch of the convex part or concave part formed by embossing is 0.2 mm or more,
The lid | cover material of Claim 1 whose width | variety of the said peripheral area | region is 0.5 mm or more.

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