JP2000219278A - Releasable lid material with hot water drain hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a releasable lid material with a hot water drain hole, without paper peeling-off phenomena of the surface sheet and interlayer releasing at an easily releasable layer in a lid material for instant foods with a hot water drain hole. SOLUTION: A releasable lid material with a hot water drain hole wherein a surface sheet 20 prepd. by applying a pull-tub 12 on the peripheral edge part and a sealing varnish layer 40 on the back face and a composite sheet 10 prepd. by laminating an adhesive resin layer 15, a metal foil layer 17 and a sealant layer 16 in this order are laminated and stuck into a specified shape through an easily releasable layer 30 prepd. by coating with an easily releasable agent and half cuts 50 for forming hot water cutting holes with an inner diameter R are formed at one or a plurality of positions of the composite sheet 10 and at least an adhesive part 60 within the half cut region with an inner radius (r) of at most 2R/3 is formed on the adhesive resin layer 15 face and the sealing varnish layer 40 within the half cuts 50 region for forming the hot water drain hole and the easily releasable layer 30 is a mixture of an easily releasable resin and wax and the ratio is 8/2-1.5/8.5, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid material for a container used for hermetic packaging of instant foods such as fried noodles, and more particularly to a hot water outlet for discharging hot water injected to soften instant foods. The present invention relates to a lid material provided with a hot water outlet.

[0002]

2. Description of the Related Art As shown in the side sectional view of FIG. 5, for example, a lid material with a hot water outlet of a conventional instant food container is provided on the back surface of a surface sheet (20) provided with a hole for breaking through (77). The aluminum foil (19) and the sealant layer (16) are laminated. When the hot water is drained, the aluminum foil (19) and the sealant layer (16) must be pierced from the piercing hole (77) with a chopstick or the like. Therefore, the size and shape of the opening are not constant, and there is a risk that breakage debris may enter the food or the like.

On the other hand, there has recently been a peelable lid material with a hot water outlet as shown in, for example, a side sectional view of FIG. 6A and a plan view of FIG. 6B. It is a sheet-like lid (for example, circular) in which the topsheet (20) is on the outer surface side, and the composite sheet (10) is overlapped and laminated on the inner surface (food side),
An easy release agent (release varnish) is formed by applying an easy release agent (release varnish) to the inner surface of the overlap between the composite sheet (10) and the top sheet (20) in a partial region from the outer peripheral arc portion of the lid to the inside thereof. An easy peeling area (L1) is provided by the peeling layer (30), and an adhesive area (L2) in a bonded state is provided on the other inner surface of the composite sheet (10) and the topsheet (20). ing.

[0004] In one to several places of the composite sheet (10) in the easy-peeling area (L1), a half-cut (50) for forming a hot-water hole having an inner diameter R is formed. On the inner surfaces of the composite sheet (10) and the topsheet (20) in the cut-cut forming half-cut (50) region, the adhesive portion (60) in the half-cut region having an inner diameter r (the portion where the easily peelable layer (30) is not formed). Is provided, and the composite sheet (10) and the topsheet (20) are bonded to each other at the bonding portion (60) in the half-cut area.

As shown in FIG. 7, the instant food container having the above structure is provided with an opening flange (21) at the upper end of the container (2) containing the instant food, as shown in FIG. By sealing and packaging the container (2) in a sealed manner, the instant food is sealed and packaged to provide an instant food container.

The container (2) in which the ready-to-eat food is hermetically sealed as described above is pulled up on the pull tab (13) on the outer periphery of the lid member on the side of the bonding area (L2) shown in FIG. The composite sheet (10) on the side of the bonding area (L2) is partially peeled off from the flange section (21) of (2) to open the opening, and after pouring hot water through the opening, the pull tab (13) on the outer periphery of the lid member is removed. It is folded again outside the flange portion (21), covered, and left for a few minutes to soften instant food (not shown) in the container.

[0007] Thereafter, an easy peeling region (L) shown in FIG.
Pull up the pull tab (12) on the outer periphery of 1),
As shown in FIG. 8, the top sheet (20) in the easily peelable region (L1) is peeled off from the composite sheet (10).
The composite sheet (10) in the region of the half-cut (50) for forming a hot water spout adhered to the top sheet (20) is separated, and the hot water spout (70) having a stable inner diameter R is cut into the composite sheet (10). Is formed, the container (2) can be tilted to discharge the hot water therein from the hot water spout (70).

[0008]

However, in the above-mentioned conventional releasable lid material with a hot water cutout, the topsheet (20)
When peeling off the composite sheet (10) from the composite sheet (10), the peeling is not easy in the easily peeling area (L1), that is, the peeling property is poor, and the paper sheet (20) is peeled off. There was a point. This is an easy release agent (release varnish)
Is absorbed by the paper of the topsheet (20) and the adhesive strength is increased.

[0009] This problem is caused by the fact that the release varnish as an easy release agent is used. For example, an attempt is made to improve the releasability by mixing a wax or silicon resin with an easily removable resin such as nitrified cotton. On the contrary, there is a problem that the peelability is too good, and the interlayer is peeled off in the easily peelable layer (30), and peels off during the production.

[0010] The present invention is to solve the problems of the prior art, and an object thereof is to provide an instant food lid material provided with a hot water outlet for discharging hot water to soften instant food. When the topsheet is peeled from the composite sheet, the topsheet is preferably easily peeled off with the easily peelable layer, that is, there is no delamination phenomenon of the topsheet made of paper, and there is no delamination in the easily peelable layer. An object of the present invention is to provide a functional lid material.

[0011]

Means for Solving the Problems In order to achieve the above object in the present invention, first, according to the first aspect of the present invention, there is provided a topsheet having a pull tab on a peripheral portion and a sealing varnish layer applied on a back surface. Filling varnish layer surface and adhesive resin layer, metal foil layer, the adhesive resin layer surface of the composite sheet obtained by laminating in order of the sealant layer and the easy release layer obtained by applying an easy release agent in a predetermined shape A half cut for forming a cutout having a shape of a cutout having an inner diameter R is formed at one or a plurality of positions of the composite sheet on the pull tab side, and the composite in the cutout forming halfcut region is formed. A peelable lid material with a hot water cutout in which an adhesive portion in a half-cut region having an inner diameter r of 2R / 3 or less is formed at least on an adhesive resin layer surface and a sealing varnish layer surface of the sheet, and the pull tab is pulled up. , By peeling from partially cover the surface sheet in the easily-peelable layer portion, in which the water cut with peelable lid material characterized by capable of opening the hot water cut.

Further, in the invention of claim 2, the easily peelable layer is made of a mixture of an easily peelable resin and wax, and the wax is 20 to 85% by weight based on the total amount of the mixture. A releasable lid material with a hot water outlet as described.

[0013]

Embodiments of the present invention will be described below. As shown in the side sectional view of FIG. 1 and the plan view of FIG. 2, the peelable lid material with a hot water spout has a pull tub (12) on the periphery and a sealing varnish layer (40) on the back surface. Of the composite sheet (10) obtained by laminating the sealing varnish layer (40) surface of the topsheet (20), the adhesive resin layer (15), the metal foil layer (17), and the sealant layer (16) in this order. The adhesive sheet (15) is laminated and bonded to the surface of the adhesive resin layer (15) via an easy-peeling layer (30) obtained by applying an easy-peeling agent in a predetermined shape, and the composite sheet (10) on the pull tab (12) side is bonded. A half-cut (50) for forming a hot water cutout having an inner diameter R is formed at one or a plurality of positions in (1).
A half cut having an inner diameter r of at least 2R / 3 or less is provided on the surface of the adhesive resin layer (15) and the surface of the filling varnish layer (40) of the composite sheet (10) in the half cut (50) region for forming the hot water spout. As shown in FIG. 4, the pull tab (12) is pulled up, and the topsheet (20) is formed into an easily peelable layer (30). The hot water outlet (70) can be opened by partially peeling off the lid at the portion ()).

The easily peelable layer (30) is made of a mixture of an easily peelable resin and wax, and the wax is 20 to 85% by weight with respect to the mixture.
It is.

As described above, the surface sheet (20) is provided with the filling varnish layer (40) on the back surface thereof to form the easily peelable layer (30) having the above-mentioned composition. ), Easy peeling layer (30)
At a suitable strength. That is, it is possible to obtain the peelable lid material (1) with a hot water cutout, which has no paper peeling phenomenon of the topsheet (20) made of paper and has no delamination phenomenon in the easily peelable layer (30).

That is, the wax is added in an amount of 20 to the total amount of the mixture.
If it is less than 10% by weight, the sealing resin layer (1) between the sealing varnish layer (40) of the topsheet (20) and the composite sheet (10).
5) The adhesive strength with the adhesive is too strong, and phenomena such as paper peeling occur.
If the content exceeds 5% by weight, a delamination phenomenon occurs in the easily peelable layer (30).
It is preferable to set the weight%.

Here, the appropriate peelability of the easy peeling layer (30) means that the adhesive strength in the peeling test is 10 to 20 g / 1.
If it is less than 10 g / 15 mm, delamination occurs in the easily peelable layer (30), and it may be spontaneously peeled off during production or the like. If it exceeds 20 g / 15 mm, the adhesive strength is too strong and the surface sheet (20) This is a paper peeling phenomenon.

One of the factors that allowed the adhesive strength for evaluating the releasability of the easily peelable layer (30) to be within the above range was that the sealing varnish layer ( 40), the sealing varnish layer (4
When an easy-release agent (release varnish) is applied on top of 0), the penetration of the easy-release agent (the permeation of the easy-release agent does not fulfill its role and increases the adhesive strength) can be prevented, and as a result, the peelability is reduced. It is an improvement.

Still another factor is that the easily peelable layer (3
0) is an easy-release agent (release varnish) composed of a mixture of 20 to 85% by weight of a wax and an easily-released resin such as nitrified cotton. The adhesive strength at (30) is 10 to 20 g /
It can be 15 mm.

As the topsheet (20) constituting the peelable lid material (1) with the hot water outlet of the instant food container of the present invention, the surface must be excellent in printability, and therefore paper is mainly used, for example. Single-sided art paper and double-sided art paper having a rice basis weight of 127.9 g / m ² are preferable, and coated paper, high-quality paper, and the like having a similar thickness can also be used.

As the composite sheet (10), FIG.
As shown in the figure, in order from the inner side of the container (the lower side in the drawing)
It is composed of a sealant layer (16), a metal foil layer (17), and an adhesive resin layer (18). The sealant layer (16), which is the innermost layer, has excellent heat sealability with a container, and is particularly suitable for foods as contents. It is necessary to use a thermoplastic resin that does not affect, for example, a low-density polyethylene resin, a medium-density polyethylene resin, a polypropylene resin, an ethylene-propylene copolymer, and the like, and may be appropriately used as a film or for melt extrusion lamination. it can.

As the metal foil layer (17), an aluminum foil is generally used from the viewpoint of economy and the like, and is used to enhance the storage stability by shielding the contents from light and preventing gas permeation.

As the adhesive resin layer (15), for example, polyethylene, ionomer, polypropylene or the like by hot-melt extrusion is preferably used in consideration of the productivity of the lid material, but is not particularly limited thereto.

The filling varnish layer (40) serves to fill the top sheet (20) made of the paper.
For example, a mixed varnish of a nitrified cotton (nitrocellulose) resin and a urethane resin, an amino alkyd resin, a polyamide resin, and a polyester resin may be used, but is not limited thereto.

The easily peelable resin forming the easily peelable layer (30) includes, but is not limited to, a nitrified cotton (nitrocellulose) resin, a polyamide resin, a polyester resin, and the like. Examples of the wax to be mixed with these include, for example, polyethylene-based wax and polyester-based wax, but are not limited to these resins as long as they are compatible with the easily peelable resin.

The releasable lid material (1) of the instant food container of the instant food container with a hot water spout is preferably used as a lid for containers such as instant noodles and instant noodles, which are poured into hot water to soften and soften and then eaten. Can be used.

[0027]

As described above, the present invention has the following effects. That is, the adhesiveness of the composite sheet obtained by laminating the sealing varnish layer surface of the top sheet having the pull tab on the peripheral portion and having the sealing varnish layer on the back surface, the adhesive resin layer, the metal foil layer, and the sealant layer in this order. The resin layer surface is laminated and adhered to a predetermined shape via an easy-release layer obtained by applying an easy-release agent composed of a mixture of the easy-release resin and wax in a ratio of 8/2 to 1.5 / 8.5, At one or more positions of the composite sheet on the side of the pull tab, a half cut for forming a cutout having an inner diameter R is formed, and the surface of the adhesive resin layer of the composite sheet in the half cut region for forming the cutout is formed. And the back surface of the topsheet has an inner diameter r of at least 2
Since a peelable lid material with a hot water cutout having an adhesive portion in a half-cut area of R / 3 or less is formed, the pull-up tab is pulled up, and when the pull-tab is partially peeled off from the lid by the easily peelable layer, the topsheet (20 )), Since the filling varnish layer is formed between the paper and the easy-peeling layer (30), the easy-peeling resin is not absorbed by the paper. It is possible to obtain a releasable lid material with a hot water cutout, which does not have the paper peeling phenomenon of the topsheet and does not have delamination in the easily peelable layer.

[0028] Further, by providing a peelable lid with a hot water cutout opening capable of opening the hot water cutout by the peeling,
In contrast to the conventional method of drilling hot water holes by breaking through,
A cutout having a stable size can be formed, and breakage scum can be prevented.

Accordingly, the present invention provides an excellent practical use as a peelable lid material with a hot water cutout for a container for an instant food, in which hot water such as instant yakisoba or instant raw noodles is poured to loosen the food, and then the food is drained and then eaten. Demonstrate the above effects.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a peelable lid material with a hot water cutout according to the present invention in a side cross section.

FIG. 2 is a plan view illustrating an embodiment of the peelable lid material with a hot water spout of the present invention.

FIG. 3 is a side view of an instant food container showing an embodiment in which the peelable lid material with a hot water spout of the present invention is integrated with the container.

FIG. 4 is an example of a side view in which a top sheet of a peelable lid material with a hot water cutout of the present invention is peeled to form a hot water cutout.

FIG. 5 is a side sectional view illustrating an example of a conventional lid member with a hot water spout.

6 (a) and 6 (b) illustrate an example of a conventional detachable lid material with a hot water spout, FIG. 6 (a) is a side sectional view thereof, and FIG.
It is a top view.

FIG. 7 is a side view illustrating an example in which a conventional detachable lid with a hot water outlet is integrated with a container.

FIG. 8 is an example of a side view in which a top sheet of a conventional releasable lid material with a hot water hole is peeled to form a hot water hole.

[Explanation of symbols]

 1 ‥‥ Removable lid material with hot water cutout 2 ‥‥ Container 10 ‥‥ Composite sheet 12 ‥‥ Pull tab on top sheet 13 ‥‥ Pull tab on adhesive area side 15 ‥‥ Adhesive resin layer 16 ‥‥ Sealant layer 17 ‥‥ Metal Foil layer 19 Aluminum foil 20 Surface sheet 21 Flange 30 Easy release layer 40 Sealing varnish layer 50 Half cut for forming hot water cutout 60 Adhesive portion in half cut area 70 Hot water spout 77 ‥‥ Hole for breakthrough L1 ‥‥ Easy peeling area L2 ‥‥ Adhesive area R ‥‥ Inner diameter of half cut for forming hot water outlet r ‥‥ Inner diameter of adhesive part in half cut area

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E067 AA11 AB01 BA07A BB12A BB14A BB15A BB16A BC07A CA24 EA06 EA35 EB05 EB11 EB29 GB07 GD08

Claims (2)

[Claims] 1. A composite sheet comprising a surface varnish layer of a top sheet having a pull tab on the periphery and having a filler varnish layer on the back surface, an adhesive resin layer, a metal foil layer, and a sealant layer in that order. The adhesive resin layer surface is laminated and adhered via an easy-peeling layer obtained by applying an easy-peeling agent in a predetermined shape, and one to a plurality of places of the composite sheet on the pull tab side have an inner diameter R. A half-cut for forming a hot-water spout is formed, and at least an inner diameter r is 2R / 3 or less in the adhesive resin layer surface and the sealing varnish layer surface of the composite sheet in the half-cut region for the hot water spout formation. A releasable lid material with a hot water cutout in which an in-region adhesive portion is formed, wherein the pullout tab is pulled up, and the hot water cutout can be opened by partially peeling off the topsheet from the lid with an easily peelable layer. Hot water cut with a peelable lid material to be characterized. 2. The easy-releasable layer is composed of a mixture of an easily-releasable resin and wax, and the wax is used in an amount of 20 to 8 with respect to the total amount of the mixture.
2. The detachable lid material with a hot water spout according to claim 1, wherein the content is 5% by weight.