JPH052464Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) This invention is used for container lids, more specifically, for example, instant coffee, powdered juice, powdered granular spices such as shichimi chili pepper, powdered granular seasoning, coffee, etc. When sealing powder or fine granular substances that do not absorb moisture, such as cream powder for addition to sesame seeds, into a container such as a glass or plastic bottle, directly adhere to the opening of the container and seal it. This relates to a sheet-shaped lid that is suitable for occasional use.

(Prior art) In order to fill a bottle with the above-mentioned powder and granular materials that dislike moisture absorption and seal the bottle, a laminate of thin paper such as glassine paper and aluminum foil is conventionally placed on the side of the thin paper. so that it is against the opening of the bottle,
A water-soluble adhesive that has been applied to the opening of the bottle is also used to seal the opening. The size of the sheet-like lid made of the laminate at this time is slightly larger than the outer periphery of the opening of the bottle, that is, the outer periphery of the lid slightly protrudes from the outer periphery of the bottle opening when sealed. Make it so that To open the lid sealed in this manner, grasp the protruding portion of the outer peripheral edge of the lid with your fingertips and pull the lid so as to peel it off from the bottle opening.

(Problems to be Solved by the Invention) When the sheet-like lid is peeled off and opened as described above, there are the following problems.

(b) The glassine paper side of the sheet-like lid is glued to the opening of the bottle, making it difficult to remove the lid. It is very difficult to remove the lid without damaging it, and in most cases it will break, resulting in the entire lid being removed and thrown away.

This sheet-like lid serves as an inner lid, and the opening of the bottle is further covered with a plastic outer lid (usually a thick cushioned sheet such as cardboard is fitted inside this outer lid). It is beginning to be covered with a lid. If the sheet-like inner lid can be peeled off without any damage, one end of the inner lid can be left glued to the opening of the bottle, and when the outer lid is tightened, the inner lid can be placed over the opening. It is preferable to put the outer lid on the inner lid because the aluminum foil on the inner lid can protect the contents from moisture. However, it is difficult to remove the inner lid without damaging it at all, and if the damaged inner lid is discarded, the gas barrier properties of the inner lid cannot be utilized.

(b) As mentioned above, conventional sheet-like sealing lids are difficult to remove, and even after being removed, water-soluble adhesive remains on the top surface of the opening of the bottle, and a portion of the glassine paper remains attached, resulting in the contents being damaged. Not only is this undesirable from a sanitary standpoint and is unsightly, but these residues also eliminate unevenness, so even if you reapply the peeled-off inner lid and tighten it with the outer lid, or The entire lid was thrown away;
Even when the outer lid is used alone, it is difficult to achieve a sufficient seal due to the residual unevenness.

(Means for Solving the Problems) The object of the present invention is to provide a lid for a container that solves the above-mentioned problems. The appearance of the top surface of the opening is not unsightly, and the gas barrier layer, which is mainly made of aluminum foil that makes up the lid, can be peeled off without damage, and one end of the gas barrier layer remains bonded to the opening of the container, allowing it to be opened and closed freely. This feature helps prevent the contents of the container from absorbing moisture even after opening.

Hereinafter, the present invention will be explained in detail along with the description of the accompanying drawings showing an example of its implementation.

FIG. 1 is a schematic bottom view of an example of the lid of the present invention, and FIG. 2 is a schematic cross-sectional front view of the lid of the present invention taken along the line - in FIG. 1, and is shown in a state adhered to the opening of a bottle. FIG. 3 is an explanatory (cross-sectional) view showing the state when the lid of the present invention is opened. In addition, these drawings are
For ease of viewing, the layer thicknesses are shown enlarged, and therefore the dimensional relationships of the various parts are not properly proportional.

In the figure, 1 is a gas barrier layer mainly made of aluminum foil, 2 is a thin paper layer, 3 is an adhesive strength adjustment adhesive layer (hereinafter referred to as adjustment adhesive layer), 4 is an aluminum foil that constitutes the gas barrier layer 1, and 5 is a thin paper layer. An aluminum foil protective layer that constitutes the gas barrier layer 1; 6 a heat-sensitive adhesive layer that constitutes the adjustment adhesive layer 3; 7 a release coat layer that constitutes the adjustment adhesive layer 3; 8 a cut formed in the thin paper layer 2; , 9 is a portion that protrudes from the outer peripheral edge of the opening of the bottle when the lid of the present invention is sealed and adhered to the opening of the bottle, 10 is a cut provided in the protruding portion 9,
11 is a portion of the tissue paper layer 2 surrounded by the cut 8, 12 is a portion of the tissue layer 2 outside of the cut 8, 13 is the opening of the bottle, and 14 is a lid of the present invention attached to the opening 13 of the bottle. This is a water-soluble adhesive layer for adhesion.

The lid of the present invention is formed by adhering and laminating a gas barrier layer 1 mainly made of aluminum foil and a thin paper layer 2 with an adjustment adhesive layer 3. In the drawing, the gas barrier layer 1 consists of an aluminum foil 4 and an aluminum foil protective layer 5.

For example, the aluminum foil 4 has a thickness of 7
A material having a diameter of about 40 μm is used, and its excellent gas barrier property prevents the contents inside the container from moisture and prevents the escape of the aroma of coffee and spices.

As the aluminum foil protective layer 5, polyester (for example, polyethylene terephthalate), polyethylene, polypropylene, polybutylene, polystyrene, polyvinyl chloride, polyamide (nylon),
Plastic film such as polycarbonate (composite film may also be used) (thickness is, for example, 10~
50μ) is used. This will be explained later, but
In order to manufacture the lid of the present invention, a tissue paper layer 2 is laminated on the gas barrier layer 1, and then when the tissue paper layer 2 is made a cut 8, the cut is cut deeply into the aluminum foil layer by the blade. This is to prevent

The thin paper layer 2 may be thin such as glassine paper or parchment paper (thickness 20 to 50 g/m ² , preferably
30.5g/m ² ) Durable paper is used. This thing is
It helps bond the metal product, such as aluminum foil, to the opening of the bottle.

When viewing this layer in plan, the adjustment adhesive layer 3 has the following properties:
3A, 3B (this layer 3B further includes 3B-1 and 3B-
2) and 3C. That is, 3A and 3B in Figures 1 and 2
(3B-1, 3B-2) and 3C, and in each region, the adhesive strength between the gas barrier layer 1 and the tissue paper layer 2, in other words, the adhesive strength between the gas barrier layer 1 and the tissue paper layer 2. There are differences in peel strength. That is, the area of 3A is
The adhesive strength in the 3B area is weaker than 3A and can be relatively easily peeled off when pulled with the fingertips, and the 3C area has a strength that makes it easier to peel off than 3B. shall be. To illustrate its strength, a test piece of 15
Make a tape with a width of mm and bend it 180 degrees to make a 200mm
When using the test method of pulling at a pulling speed of mm/min,
3A is 200g/15mm width or more (upper limit is about 500g/15mm width), 3B is 100-200g/15mm width, 3C is
The strength should be 100g/15mm width or less (the lower limit is about 50g/15mm width).

As can be seen from FIG. 1, the zone 3A is a relatively narrow region located toward the edge of the lid, which cannot be easily peeled off when the gas barrier layer 1 is peeled off, and as shown in FIG. It serves as a hinge for the gas barrier layer 1. The zone 3C is for creating a gap for peeling the gas barrier layer 1, so that the gas barrier layer can be peeled off by applying a slight force with a fingertip. Therefore, when the lid of the present invention is adhered to the container opening, its width, including the portion indicated by 9 in FIG. 2, which protrudes from the opening of the container, may be extremely small. Zone 3B is sandwiched between zones 3A and 3C and occupies most of the central portion of conditioning adhesive layer 3, and cuts 8 are pre-provided in the area of tissue layer 2 corresponding to this area of 3B. Thus, when the gas barrier layer 1 is peeled off, the portion 11 of the tissue paper layer 2 surrounded by the cut 8 remains attached to the gas barrier layer 1, and the portion 12 outside the cut 8 forms the opening of the bottle. 13 (Fig. 3), a large entrance/exit is formed at the opening of the bottle. Therefore, it is preferable that the cut 8 has a large frame so as to form a doorway as large as possible. As for the shape of the frame of the cut 8, it is preferable to provide a corner-shaped portion as shown by C on the left side in FIG. 1, because the thin paper layer at the portion indicated by 11 within the frame of the cut 8 can be easily peeled off.

Furthermore, if band 3B is divided into bands 3B-1 and 3B-2, and 3B-2 is made to have a higher adhesive strength than 3B-1 (for example, 3B-
1 is 100~150g/15mm width, 3B-2 is 150~
200g/15mm width), the start of peeling in the area surrounded by cut 8 is ensured, and once this peeling has started, after that, even if the adhesive strength is slightly smaller, the part surrounded by cut 8 Peeling is reliably continued while the thin paper layer portion indicated by 11 in the frame remains attached. That is, bands 3A, 3B (3B-1, 3B-
2) The relationship between the adhesive strength of 3C is expressed as follows.

3A>3B-2≧3B-1>3C As described above, an example of a method for forming the adjustment adhesive layer 3 having bands of different adhesive strengths is as follows.

The adjusting adhesive layer 3, as shown in Fig. 2, is made by overlaying a release coat layer 7 on a heat-sensitive adhesive layer 6 to adjust the adhesive strength of the heat-sensitive adhesive. Heat-sensitive adhesives made of polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polyester, polyamide, ethylene-acrylic acid copolymer, ionomer resin, etc. are used.
The release coat may be a release agent containing silicone as an active ingredient, and the adhesive strength of the zones 3A to 3C in the heat-sensitive adhesive layer 3 may be adjusted by changing the amount of release agent layered per unit area in the release coat or by changing the concentration of the active ingredient in the release coat to be layered. It is also possible to leave the release coat layer unlayered in zone 3A, which has the greatest adhesive strength.

In addition, different types of adhesives having different adhesive strengths may be applied in combination.

Next, an example of the manufacturing process of the lid of the present invention will be explained.

(a) First, a long length of aluminum foil is laminated with a long length of polyethylene terephthalate film by dry lamination.

(b) A release agent composition is applied to the polyethylene terephthalate surface of the long laminate obtained in (a) to form a release coat layer. That is, a release agent composition whose adhesive strength has been adjusted to a desired value is applied to each lid using a roll set to have a desired width, corresponding to the area where the inner part of each lid is finally to be punched. .

(c) A heat-sensitive adhesive (for example, polyethylene) is extruded between the surface of the release coat layer of the long laminate obtained in (b) above and the glassine paper, and the adhesive is bonded.

(d) Make a cut that reaches near the surface of the polyethylene terephthalate film from the glassine paper side of the laminate obtained in (c) above.

(e) For the long laminate obtained in (d) above, individual lids are punched out to produce a product.

If the top surface of the aluminum foil on the lid has letters,
If you wish to print figures, etc., it is best to do so after the step (c) above.

Next, how to use the lid of the present invention will be explained.

The lid of the present invention is adhered to the opening of a bottle filled with instant coffee, for example, with a water-soluble adhesive (an adhesive other than the water-soluble adhesive may be used) to seal the contents. Its condition is as shown in Figure 2, and the periphery of the lid protrudes a little beyond the outer periphery of the bottle opening. Make sure that the cut 10 is on the outside of the outer periphery of the bottle opening.

To open an instant coffee bottle sealed in this way, pinch the cut 10 with your fingertips and pull to peel off the gas barrier layer 1. In this case, since the adhesive strength of the band 3C is very low, it is easily peeled off. Note that even if the cuts 10 are not made, the band 3C is easily peeled off. Continue this pulling and peeling to remove zone 3.
When there is only peeling in part B, the adhesive strength in this zone is somewhat greater than in 3C, but
At that point, the part of the gas barrier layer that has already been peeled off is quite large and can be sufficiently pinched with the fingertips, making it easier to peel off. When this peeling reaches the corner part of the tip of the cut 8 (the part shown as C in FIG. 1), the part C is pulled while being attached to the gas barrier layer 1, and the opening in the tissue paper layer 2 is opened. It begins. The outer portion 12 of the cut 8 remains in place since it is strongly adhered to the bottle opening 13 with a water-soluble adhesive. In this way, the portion 1 surrounded by the cut 8 in the tissue paper layer 2
1 is peeled off to open this area, and when the peel reaches zone 3A, the adhesive strength here is said to be such that it cannot be easily peeled off, and the state shown in Figure 3 is reached, and the peeling is no longer possible. will be stopped.

Note that also when the zone 3B is divided into 3B-1 and 3B-2, the peeling of the gas barrier layer 1 follows the same process as described above. Once the part indicated by C in the zone 3B-2 is opened, even if the strength between the tissue paper layer 2 and the gas barrier layer 1 is reduced, the part 11 surrounded by the cut 8
is removed while remaining attached to the gas barrier layer 1, and opening is performed.

(Effects of the invention) (a) Like the conventional inner lid, the lid of the present invention is used by sealing the opening of the bottle with a water-soluble adhesive; It's very easy to do.

(b) In a container using the lid of the present invention, after the lid is opened, the top surface of the bottle opening remains covered with tissue paper, which makes it less hygienic and less aesthetically pleasing than conventional containers. There is no such inconvenience, and furthermore, there is no problem in the sealing of the outer lid due to uneven residue caused by adhesive or the like, which is the case in the past.

(c) The gas barrier layer remains openable and closable even after opening, and by pressing this gas barrier layer against the bottle opening with the outer lid, the moisture-proofing and aroma escape prevention effects are maintained.

[Brief explanation of the drawing]

FIG. 1 is a schematic bottom view of an example of the lid of the present invention, and FIG. 2 is a schematic cross-sectional front view of the lid of the present invention taken along the line - in FIG. 1, and is shown in a state adhered to the opening of a bottle. FIG. 3 is an explanatory view showing the state when the lid of the present invention is opened. 1 is a gas barrier layer mainly made of aluminum foil, 2 is a thin paper layer, 3 is an adhesive layer for adjusting adhesive strength, and 4 is a gas barrier layer mainly made of aluminum foil.
is aluminum foil, 5 is aluminum foil protective layer,
6 is a heat-sensitive adhesive layer, 7 is a release coat layer, 8 is a heat-sensitive adhesive layer;
is a cut.

Claims (1)

[Scope of utility model registration request] A gas barrier layer 1 mainly made of aluminum foil and a thin paper layer 2 are laminated and bonded together with an adhesive strength adjusting adhesive layer 3. The zone 3A has an adhesive strength that cannot be peeled off easily, the zone 3B has an adhesive strength that is easier to peel than the zone 3A, and the zone 3C has an adhesive strength that is easier to peel than the zone 3B. A lid for a container, in which the thin paper layer 2 is provided with a cut 8 forming an opening in a region corresponding to the region 3B of the adhesive strength adjusting adhesive layer 3, and the thin paper layer 2 is the inner surface of the lid.