JP2016013841A - Lid material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid material which adheres to an opening of a container body, is not cut in an unintended direction even when a take-out part is formed by partial tearing, and prevents the generation of paper powder.SOLUTION: A lid material 100 which adheres to an opening of a container body consists of a laminate on which aluminum foil, a biaxially-oriented resin film, and a seal layer are laminated in this order from an outer layer side, is provided with easy-to-cut lines 1, 2 formed by cutting the biaxially-oriented resin film, and can be provided with a take-out part partially by tearing the easy-to-cut lines. The easy-to-cut lines consist of a first easy-to-cut line 1 which extends in a right-left direction and a second easy-to-cut line 2 which is provided apart from the first easy-to-cut line, whose both ends are arranged on a first easy-to-cut line side, and which has a convex shape with respect to the opposite side. The second easy-to-cut line extends longer in the right-left direction than both ends of the first easy-to-cut line and has a linear or arch shape.

Description

  The present invention relates to a lid member. In particular, the present invention relates to a lid member that is bonded to an opening of a container main body and is partially broken so that a takeout portion can be provided.

  A lid using aluminum foil is used to seal containers for contents such as instant coffee and other foods and pharmaceuticals that require sealing, moisture-proofing, and antioxidant properties. For such a lid material, a resin having an easy peel property imparted to the seal layer is generally used and is peeled off from the container. However, depending on the contents, an easy peel resin may not be used. .

  In that case, the lid material is torn and opened, but if the lid material is an aluminum foil alone, it can be broken, but if a biaxially stretched resin film such as polyethylene terephthalate is laminated, it will break. However, it was necessary to use a blade.

  Although it seems that the laminated lid material in which the aluminum foil is bonded to the paper can be torn, there is a concern that the tearing direction cannot be controlled and the paper dust is mixed into the contents.

  On the other hand, it is possible to cut the biaxially stretched resin film in advance using a blade and open it along the cut, but the biaxially stretched resin film is cut in an unintended direction from the joint part. It was necessary to be careful when opening.

  In addition, there is an inner seal material made of a lid material on which an easily breakable line such as a cut is formed. In this inner seal material, a reseal layer mainly composed of paperboard and a seal layer are laminated via a peelable resin layer, the seal layer side is bonded to the container mouth, and an opening for taking out is formed in the seal layer. An easily breakable line is formed (Patent Document 1).

  The easily breakable line of this inner seal material is composed of, for example, slits that form perforated discontinuous lines, slits in chain lines, and streak-like grooves, and are punched, half-cut, and sewing needles. It is formed by processing, slitting, or the like.

  This inner seal material may be cut in the above-described unintended direction, so care must be taken when opening it, and there is still a concern that paper dust may be mixed into the contents.

  Known documents are shown below.

JP-A-1-267167

  The present invention has been made in view of the above circumstances, and is a lid material that adheres to the opening of the container body, and even if it is partially broken to form a takeout portion, it does not break in an unintended direction. An object of the present invention is to provide a lid member that does not generate paper dust.

This invention is made in view of the subject which concerns, and invention of Claim 1 is a lid | cover material adhere | attached on the opening part of a container main body,
From the outer layer side, an aluminum foil, a biaxially stretched resin film, and a seal layer are composed of a laminated body laminated in this order. By providing an easy cut line that cuts the biaxially stretched resin film, the easy cut line is broken. The lid member is characterized in that a take-out portion can be partially provided.

  The invention of claim 2 of the present invention is such that the easy cutting line is provided apart from the first easy cutting line extending in the left and right directions, and both ends are provided on the first easy cutting line side. The lid material according to claim 1, comprising a second easy cutting line having a convex shape on the opposite side.

  The invention of claim 3 of the present invention is characterized in that the second easy-cut line extends longer to the left and right than both ends of the first easy-cut line, and is linear or arcuate. Item 3. The lid material according to Item 2.

  Even if the lid material bonded to the opening of the container body of the present invention is partially broken to form the takeout portion, it does not break in an unintended direction. Further, paper dust or the like is not mixed into the contents.

It is explanatory drawing which showed typically an example of the cover material of this invention in the cross section. It is explanatory drawing which showed typically an example of the cover material of this invention with the plane. It is explanatory drawing which showed typically the other example of the cover material of this invention with the plane. It is explanatory drawing which showed still the other example of the lid | cover material of this invention typically with the plane.

Hereinafter, embodiments for carrying out the present invention will be described.
FIG. 1 is an explanatory view schematically showing an example of a lid material of the present invention in a cross-section, FIG. 2 is an explanatory view schematically showing an example of the lid material of the present invention in a plan view, and FIG. FIG. 4 is an explanatory view schematically showing another example of the lid member of the present invention in a plan view.

  The lid member 100 of this example is a lid member that is bonded to the opening of the container body by the bonding portion 21. As shown in the cross-sectional view of FIG. 1, the aluminum foil 11, the biaxially stretched resin film 12, and the seal layer 13 are composed of a laminated body laminated in this order.

  And the biaxially stretched resin film 12 of this laminated body, or the biaxially stretched resin film 12 and the sealing layer 13 are provided with the first easy-cut line 1 and the second easy-cut line 2. .

  As shown in FIG. 2, the first easy cutting line 1 is provided in a straight line extending in the left and right directions in the vicinity of the bonding portion 21 with the container body, and the second easy cutting line 2 is the first easy cutting line 1 side. Are provided in a shape that is convex on the opposite side. Moreover, the 1st easy cutting line 1 may be provided in the outward convex convex arc shape like the cover material 200 of FIG.

  Also, the second easy-to-cut line 2 is not shaped like a part of the elliptical shape of the lid member 100, but shaped like a part of a square shape with rounded corners like the lid member 300 of FIG. As long as the shape is convex and can be pushed with a finger to break the second easy-to-cut line 2, there is no particular concern.

  As for the width a of the 2nd easy cutting line 2 which is convex shape, 5 mm or more and 30 mm or less are preferable. By setting this width, when the finger is pushed with a finger to break the second easy cutting line 2, the finger can be put inside the width, and can be easily opened by pushing with the finger. Further, the width b of the first easy-to-cut line 1 is longer than the width a of the second easy-to-cut line 2 and extends to the left and right.

  The distance c to the farthest point between the first easy-to-cut line 1 and the vicinity of the container main body and the inner edge of the adhesive portion 21 of the lid is preferably 2 mm or more and 5 mm or less. In this way, the contents can be easily taken out from the take-out port after the take-out port is opened.

  The distance d between the first easy cutting line 1 and the second easy cutting line 2 is preferably 10 mm or more and 50 mm or less, preferably 15 mm or more and 30 mm or less at the farthest place. Particularly preferred is a case where the distance d is 15 mm or more and 30 mm or less, and the closest distance between the first easy-to-cut line 1 and the second easy-to-cut line 2 is 2 mm or more.

  As described above, since the first easy cutting line 1 and the second easy cutting line 2 are provided, the second easy cutting line 2 is broken, and further, the both ends are separated from the portion surrounded by the second easy cutting line 2. By tearing over and reaching the first easy cutting line 1 and breaking the first easy cutting line 1, it is possible to provide a partial take-out part in the lid member. Therefore, it does not cut in an unintended direction, and since paper is not used, paper dust or the like is not mixed into the contents.

  The material of the aluminum foil 11 is not particularly limited, but a soft aluminum alloy used for packaging is preferably used. Moreover, thickness should just be a grade which can be pushed with a finger | toe and the 2nd easy cutting line 2 is torn, and the aluminum foil of 5-12 micrometers in thickness can be used preferably.

  The biaxially stretched resin film 12 is a film stretched in the flow direction and the width direction, and the resin used for this may be a thermoplastic resin. For example, polyesters such as polyethylene terephthalate, nylons such as 6-nylon, and olefinic resins such as polypropylene are preferably used.

  The sealing layer 13 is not particularly limited as long as it is an adhesive material such as polyethylene or polypropylene, or lacquer or hot melt, and the laminating method is not particularly limited.

  The first easy-to-cut line 1 and the second easy-to-cut line 2 can be provided by cutting the biaxially stretched resin film 12 by inserting a blade shape from the seal layer 13 side. More preferably, a carbon dioxide gas laser or the like is used to irradiate laser light from the seal layer 13 side to cut the biaxially stretched resin film 12 to provide the first easy-to-cut line 1 and the second easy-to-cut line 2. Can do. At this time, the seal layer 13 may be cut.

  Specific examples of the present invention will be described below.

<Example 1>
Using a polyester adhesive, an aluminum foil 9 μm of the aluminum foil 1, a biaxially stretched polyethylene terephthalate film 12 μm of the biaxially stretched resin film 12, and an unstretched linear low density polyethylene film 30 μm of the seal layer 13 in this order. The laminate was obtained by laminating by a dry lamination method.

  Next, a carbon dioxide laser is irradiated from the surface of the linear low-density polyethylene film, and the first easy-to-cut line 1 as shown in FIG. 2 extends linearly to the left and right in the vicinity of the bonding portion 21 with the container body. The second easy cutting line 2 is provided in a shape having both end portions on the first easy cutting line 1 side and a convex shape on the opposite side.

  And the width a of the second easy cutting line is 20 mm, the width b of the first easy cutting line 1 is 28 mm, and the first easy cutting line 1 and the outer edge of the adhering portion of the container body in the vicinity and the lid member The distance c to the farthest point was 4 mm, and the distance d to the farthest part of the first easy-to-cut line 1 and the second easy-to-cut line 2 was 15 mm. Moreover, the distance between the 1st easy cutting line 1 and the 2nd easy cutting line 2 was 2 mm.

  The laminated body irradiated with the carbon dioxide laser was punched into a shape matched to the outer dimension of the opening of the container, and the lid material of Example 1 was obtained. In addition, the adhesion part 21 with a container is a circular donut shape, and the diameter of the inner edge is 80 mm.

<Example 2>
The biaxially stretched polypropylene film 20 μm of the biaxially stretched resin film 12 and the unstretched polypropylene film 50 μm of the seal layer 13 were bonded together by a dry lamination method using a polyester-based adhesive.

  The laminated film is irradiated with a carbon dioxide laser, and the first easy-to-cut line 1 as shown in FIG. The line 2 was provided in a shape having both end portions on the first easy cutting line 1 side and a convex shape on the opposite side.

  And the width a of the second easy-cutting line 2 is 20 mm, the width b of the first easy-cutting line 1 is 28 mm, the first easy-cutting line 1, and the outer edge of the adhering portion between the container body and the lid in the vicinity thereof The distance c to the farthest point was 2 mm, and the distance d to the farthest point of the first easy-to-cut line 1 and the second easy-to-cut line 2 was 20 mm. Further, the closest distance between the first easy cutting line 1 and the second easy cutting line 2 was 3 mm.

  The aluminum foil 9 μm of the aluminum foil 11 was bonded to the surface of the biaxially stretched polypropylene film of the laminated film irradiated with the carbon dioxide laser by 15 μm of low density polyethylene by a sandwich lamination method.

  The laminated body thus bonded was punched into a shape matched to the outer size of the opening of the container to obtain a lid material of Example 2. In addition, the adhesion part 21 with a container is a circular donut shape, and the diameter of the inner edge is 80 mm.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
A lid material of Comparative Example 1 was prepared in the same manner as the lid material of Example 1 except that the first easy cutting line 1 and the second easy cutting line 2 were not provided.

<Comparative Example 2>
An aluminum foil 9 μm, a paper having a basis weight of 30 g / m ² and an unstretched linear low-density polyethylene film 30 μm were bonded together in this order by a dry lamination method using a polyester-based adhesive to obtain a laminate. Using this laminate, a lid material of Comparative Example 2 was prepared in the same manner as the lid material of Example 1 except that the first easy cutting line 1 and the second easy cutting line 2 were not provided.

<Test method>
The lid materials of the example and the comparative example were tested by the following method and evaluated for comparison.
Each cover material of the example and the comparative example is provided with a flange at the opening, and after sealing the opening with a circular container having an inner diameter of 80 mm, the take-out portion is opened, and the opening feeling and foreign matter mixing The presence or absence of was evaluated. The results are summarized in Table 1.

以下に、実施例と比較例との比較結果について説明する。

Below, the comparison result of an Example and a comparative example is demonstrated.

<Comparison result>
Any of the lid materials of the present invention of Examples 1 and 2 could be opened without any problem along the easy-to-cut line, and no foreign matter was mixed in.

On the other hand, the cover material of Comparative Example 1 could not be broken with a finger, and it was necessary to peel from the end or to be opened by cutting with a blade, which was difficult to open.
The lid material of Comparative Example 2 can be opened, but the shape of the opening cannot be controlled. Moreover, mixing of paper fibers was observed.

100, 200, 300 ... Lid 11 ... Aluminum foil 12 ... Biaxially stretched resin film 13 ... Seal layer 1 ... First easy cutting line 2 ... Second easy cutting line 21 ... Adhesive parts

Claims (3)

A lid that adheres to the opening of the container body,
From the outer layer side, an aluminum foil, a biaxially stretched resin film, and a seal layer are composed of a laminated body laminated in this order. By providing an easy cut line that cuts the biaxially stretched resin film, the easy cut line is broken. A cover material characterized in that a take-out portion can be partially provided.   The first easy-cutting line extending from the left and right and the first easy-cutting line are provided apart from each other, the first easy-cutting line has both ends, and has a convex shape on the opposite side. The lid material according to claim 1, comprising a second easy-to-cut line.   3. The lid according to claim 2, wherein the second easy-cut line extends to the left and right longer than both end portions of the first easy-cut line, and has a linear shape or an arc shape.

Images