JPS62146164A - Vessel cover - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lid constituting a can-like container such as a beverage can;
Furthermore, in detail, it is a can-like container lid made of a living body made of synthetic resin, which allows the contents inside the container to be ingested by inserting a straw, and which allows the lid to be easily opened using the handle. This invention relates to a can-like container lid that has various advantages such as excellent strength.

[Conventional technology]

K, which manufactures can-like container lids mainly made of synthetic resin, and AI, which has plastic on both sides! It can also be obtained by separately preparing a foil and a Jugetsu h sheet made in advance by injection molding and bonding them together with an adhesive (Patent Publication No. 52-59489).

However, with this post-adhesion method, the number of steps increases;
There are various disadvantages such as increased costs; molded products peeling due to heat history such as retort processing; poor drop strength of the manufactured product; and food hygiene issues due to the use of adhesives. there were.

The present inventors first inserted an AJ foil (hereinafter referred to as insert material) having a plastic layer as described above into a mold of an injection molding machine, and inserted a tree J1 into this.
1 was injection molded to obtain an integral product by injection molding. However, the insert material is relatively thin, and it has been difficult to obtain a complete molded product in one piece due to precision issues, as the insert material does not sit in the molded stopper and does not cause any damage. However, we succeeded in obtaining an integrally molded product by eliminating such difficulties and patent application filed in 1986-9.
No. 0749), we were able to obtain a can sampling container M that solved the various drawbacks of the conventional product, but we took into consideration the requirements υ1ρ for the lid of such a can-like container, such as high drop strength. In addition to this, an important mJ issue is that it has excellent can opening (opening) characteristics. Incidentally, the can opening characteristics and the drop strength characteristics are generally contradictory, and if one is improved, the other becomes worse.

The injection-molded integral molded product has good adhesion and high drop strength because the molten resin is laminated to the insert material, but on the other hand, the handle part (
In some cases, the handle surface may not be separated from the lid main body because the handle surface (pull top part) is also stuck tightly.

An example of the present medical treatment container lid proposed by the present inventors is shown in FIGS. 10 and 11. FIG. 11 is a sectional view of a solitary dog crying along the I-1 line vC in FIG. 10.

In these figures, 1 is a multilayer base material (insert material), such as AI! The foil 2 has pine resin layers 5 and 4 on both sides, and an injection resin resin layer 5 is placed on the insert material 1.
It has a layered structure. As a result, A! !
Since the resin layer 5 is laminated on the resin layer on the upper surface of the foil 2 by injection, a product with strong static adhesion can be obtained.

Todoroki Lid [In this case, this injection wood fkl lead 5 is separated by a notch 6 into an opening (opening) part 7 and an outer peripheral part 8 around it, and this opening part 7 has a handle part 9. ing.

According to theory 8Af regarding the opening of this lid, groove 10
When the handle surface 9 is peeled off from the multilayer substrate 1 by inserting a fingertip into the handle 9 and lifting it up, the tip of the handle 9 is wedged inside the multilayer material 1 at the position 11 shown in these figures, and the multilayer When the base layer 1 is cut and the handle part 9 is pulled, the multilayer base material 1 is cut along the notch part B, and the opening part 7 of the container lid is opened.

As mentioned above, since the adhesion between the multilayer base material 1 and the pine resin layer 5 is strong, the handle part 9 may not peel off from the multilayer base material 1. To,
The entire or partial contact area between the multilayer base material 1 and the handle part 9 is subjected to a treatment for the purpose of making the handle surface 9 easier to open from the multilayer base material 1. As a result, a treated layer 12 made of printing ink, release agent, etc. is provided.

However, in this case, there are difficulties in that it is difficult to position the surface of the multi-N base material 1 in accordance with the shape of the handle portion 9 and apply a release agent or the like with high precision.

On the other hand, in the case where the lid is opened by lifting the handle part 9 and opening the lid by cutting the notch 6 KG, the opening becomes larger, so when the can is on a vehicle or falls over, the contents of the can can leak out. Easy to spill. Generally, metal cans have a wide opening by pulling up the lip, making it easy for soft drinks and the like to spill out.

[Problem that the invention seeks to solve]

The present invention provides a can W container lid mainly made of synthetic resin as described above, which allows the contents of the can to be taken in through the straw, and has characteristics of opening the can without providing a treatment layer such as a release agent. The purpose of the present invention is to provide a lid for a can-like container with good quality.

In addition to the above-mentioned excellent can opening characteristics, the present invention also has strong drop strength, resistance to heat history such as retort processing, good food hygiene, good incineration characteristics, and good moldability. The purpose of the present invention is to provide can-like lids that have excellent properties such as good quality.

Other objects and novel features of the present invention will become apparent from the entire description and accompanying drawings.

[Means for Solving Problem C] and [Operation] The present invention is characterized in that heat-meltable resin J8 is applied to both or one side of a base material such as a metal foil, film, or sheet that is impermeable to oxygen and water. In a can-like container lid formed by layering a resin layer on the surface of a multilayer base material, the lid has a notch for opening, and a handle is attached to the inside of the notch. The synthetic resin has a mounting part, and has an exposed part of the multilayer base material for inserting a straw inside the mounting part, and the handle surface is kept as an individual part. It mainly consists of can-like container lids.

The effects of the present invention will be explained along with representative examples.
In the present invention, the handle part 9 is provided as a separate component, and the lower surface of the handle part 9 is treated with a release agent or other treatment for the purpose of making it easier to open from the multilayer base material of the handle surface. That is,
The lower surface of the handle is an exposed part of the multilayer base material, and the contents of the can can be ingested by inserting a straw into the exposed part of the multilayer base material. In such cases, the handle surface can be added to the attachment part and the handle part can be lifted up so that the notch can be easily opened.

[Actual gun example]

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 shows an example of a plan view of a can-like container lid according to the present invention, FIG. 2 is a plan view of the same with the handle removed, FIG. 3 is a plan view of the handle surface, and FIG. A cross-sectional view along the ui line in Figure
FIG. 5 is a perspective view of essential parts showing an embodiment of the present invention, FIG. 6 is a perspective view showing another example of the handle part, and FIG. 7 is a perspective view explaining how the handle part is attached to the mounting part. It is.

As shown in FIGS. 2 and 4, it is dripped in a circular band-shaped notch (score part) 13, and a similarly annular band-shaped attachment part 14 is provided along the inner side of the west notch 15. The inside of the mounting part 14 is the exposed part 1 of the multilayer base material 15, similar to the notch part 16.
Set it to 6.

As shown in detail in FIG. 5, a protrusion 18 for engagement with the handle 17 is provided on the upper part of the attachment part 14. Mounting part 14
is formed by injection of &I resin, is erected on the multilayer base material 15, and the engagement protrusion 18 is formed on the attachment part 14 at the same time as the injection molding. I can do it.

As shown in FIG. 3, an example of the handle portion 17 has a tongue-shaped structure consisting of an elliptical interior 19 and a trapezoidal portion 20, and in the example shown in FIG. An opening starting end 21 extends substantially at right angles, and a protruding portion 22 is provided at the boundary between the trapezoidal portion 20 and the beak interior 19.

As shown in FIG. 7, the lid can be opened by fitting the engagement protrusion 18 of the attachment part 14 between the opening starting end 21 and the protruding part 22 of the handle part 17 and lifting the handle part 17.

The four parts 25 shown in FIG. 7 are provided on the surface of the merging protrusion 1811j, and the convex part 24 is provided on the inner surface of the opening starting end 21 of the handle part 17, so that the concave part 23 and the convex part 24 fit together. This will make opening the lid even easier.

Regarding the relationship of the protruding portion 22, it is preferable to do the same as shown in FIG. Moreover, if saw-blade-like notches 25 are provided on the edge of the opening starting end 21, it becomes easy to bite into the multilayer base material 15, and the opening of the lid becomes even easier. Instead of such jagged edges, other shapes may be used as long as the opening can be made easily, such as having the entire tip of the Sekiguchi starting end 21 be triangular.

As shown in FIG. 4, the can-like container lid constructed as described above is produced by heating and melting the inner tree layer of the multi-N base material 15 on the body 26 of the can-like container. Attach to 26.

FIG. 8 shows an example of a can-like container to which such a can-like container lid is attached. In FIG. 8, 27 represents the container lid, and 28 represents the bottom lid. Inside the body 26, foodstuffs such as soup, soft drinks, etc. are filled and stored using retort sterilization.
It is carried through the product logistics process.

FIG. 9 shows a plan view of the lid after the end of the handle 17 is lifted and the lid is opened.

Next, I will explain the structure of the present invention.

Examples of the paulownia material 29 impermeable to oxygen, water, etc. (hereinafter referred to as gas barrier property) used in the present invention include metal foils, sheets, films, and the like.

A typical example of metal foil is aluminum foil (hereinafter simply referred to as aluminum foil), and the present invention particularly relates to a can-like container lid comprising this aluminum foil as a gas barrier base material. Other examples of gas barrier substrates include sheets of saponified ethylene-vinyl acetate copolymer, polyvinylidene chloride, polyamide, polyacrylonitrile, etc.
Examples include films.

The multilayer base material 15 used in the present invention has a resin layer (hereinafter referred to as a first resin layer), that is, a heat-meltable resin layer formed on both or one side of the gas barrier base material 29.

The first resin layer may be formed on both sides of the gas barrier base material 29, but the first resin layer may be formed on both sides of the gas barrier base material 29. The first resin layer (outer) 61 can also be omitted. When the first resin NB51, 32 is formed on both sides of the gas barrier base material 29, the outer layer 31 of the first resin layer is thermally fused to the second resin layer 30, forming a highly adhesive lid. the other first resin layer (inner layer) 52 is heat-fused with the body 26 of the container,
The lid 27 is attached to the body 26.

On the other hand, in the case of a gas barrier base material 29 in which the first resin layer 32 is formed only on one side (inner side), the second resin layer 50 is laminated directly on the base material (outer surface) 29, and the lower side ( A first pine resin layer 52 is heat-sealed to the inner surface), and the lid 27 is attached to the body 26.
is crowned.

The resin constituting the first resin layer 31 and 32 is as follows:
A resin that melts due to heat, typically a thermoplastic synthetic resin, is used. When forming (laminating) the first resin layer 51, 52 on the gas barrier substrate 29, with or without an adhesive resin layer such as an adhesive or a film-like hot melt adhesive! It can be an R layer.

In the present invention, the thickness of the first resin to 51 and 52 constituting the multilayer base material 15 is one-sided in relation to ease of opening, drop strength when made into a product, can break strength, and break strength during insert molding. The gas barrier base material 29 such as aluminum foil should have a diameter of 50μ or less, preferably 9 to 50μ.
It is desirable that μ. Furthermore, in the present invention, complete incineration can be achieved by selecting the thickness of the multilayer base material 15, particularly the thickness of the metal foil, such as aluminum foil. In recent years, the problem of can pollution has been raised, but by considering the thickness of aluminum foil and the resin material of the multilayer base material, it is possible to deal with the problem of can pollution by making it possible to completely incinerate it. Also burns 5000 calories
It is also possible to solve the problem of can pollution by reducing the amount to ~6000 Kchl/'kf.

The can-like container lid 27 of the present invention uses the multilayer base material 15 described above,
It is obtained by laminating resin on the surface by injection molding. As the resin constituting the second resin layer 50, the same resin as the resin constituting the first resin layer 51.32 is used.

A preferred example of injection molding is to use a base material insert robot to insert the base material (insert material) into the mold in advance.
15 may be fixed and injection molding is performed, and it is even more preferable to use the method described in the above-mentioned Application No. 58-90749 filed by the present applicant.

In the present invention, an inorganic filler may be mixed with the resin constituting the injection resin constituting the second resin layer 50. Mixing inorganic fillers has the following advantages.

■ The dimensional stability of the can-like container (can-like container lid) is improved and the shrinkage rate is reduced, which is advantageous when attaching the lid to the container.

■ Improved heat resistance and increased heat distortion temperature, which is advantageous for retorting.

■ Burned calories are reduced and combustion furnaces are not damaged, which is advantageous in terms of pollution prevention.

■ It is possible to have both 11 characteristics, and it is advantageous to have #L distribution of the product.

■ Good heat conduction is advantageous for retorting.

■ Cost can be reduced.

As the negative light filler, any filler that is widely used in the field of synthetic resin 3-layer rubber may be used. On the contrary, it is an inorganic compound that does not decompose during kneading and molding.

Examples of the inorganic filler include compounds such as branched metals, hydrates thereof (7), sulfates, carbonates, silicates, 6J1 salts thereof, and mixtures thereof. Ru. Representative examples of the inorganic fillers include aluminum oxide (alumina), its hydrate, calcium hydroxide, magnesium oxide (magnesia), magnesium hydroxide, zinc oxide (zinc white), red lead, and white lead. Lead oxides such as magnesium carbonate, calcium carbonate, basic magnesium carbonate, white carbon, asbestos,
Mica, Merck, Glass FI! fiber, glass powder, glass peas, clay, diatomaceous earth, silica, wollastonite, iron oxide, antimony oxide, titanium oxide (chikunia),
Litopone, pumice powder, aluminum sulfate (gypsum, etc.), silica zirconium, chlorinated zirconium IXI & HaIJ
dolomite, molybdenum disulfide and iron sand. Among these inorganic fillers, those in powder form preferably have a diameter of 20 microns or less (preferably 10 microns or less).

In addition, in the case of a fibrous material, the diameter is 1 to 500 microns (preferably 1 to 500 microns), and the length is o, 1 to 6 i.
i (preferably o, 1 to 5 m) is desirable. Furthermore, the diameter of the flat plate is 50 microns or less (preferably 10 microns or less).
(microns or less) is preferable. Among these fillers, those in the form of tabular page flakes and those in the form of powder are particularly preferred.

In addition, in the present invention, an injection molding method using a multi-point gate described in % Application No. 58-124756 filed by the present applicant can be applied.

Although the method using injection molding has been mainly described above, the mother plant container lid of the present invention can also be obtained by a method using a flattened bottom shape, and other methods may also be used. As a method of compression molding, for example, an insert material may be placed in a mold of a press machine, a heated resin sheet or a bath-melted material may be supplied to the insert material, and press molding may be performed.

〔Effect of the invention〕

flr According to the present invention, since the inner side of the mounting part where the handle part is attached is made into an exposed part of the multi-layered wood, there is a straw in this part.
can be inserted and the contents of the can can be ingested.

(2) According to the present invention, the above-mentioned problem can be achieved by providing an exposed portion of the surface of the multilayer base material, so that even if the lid is pressed from inside by the contents filled in the container, the exposed portion is The resin layers are laminated (in close contact) and therefore stretch the multilayer base material, which has a puffer effect against the internal pressure.Also, even if the can is dropped, the exposed part will not drop when the can is dropped. It can absorb the energy of the cans, have a buffer effect, and improve can breaking strength.

(3) According to the present invention, as mentioned above, the multilayer base material is exposed inside the numbered part of the handle, and there is no need to use peeling as in the previous proposal, so positioning for application etc. There is no need to think about this, and the coating process can be omitted.

(4) According to the present invention, instead of being able to drink with a straw, it is also possible to drink soft drinks through the opening provided by the handle, which is extremely convenient.

In the mother plant container lid of the present invention, since the attachment part and its outer peripheral part are separated through the notch, the can opening characteristics are also good.

(5) According to the present invention, the injection resin is welded to the resin layer of the multilayer base material, so it has good layer properties, strong drop strength, and is resistant to heat history such as retort processing, and also has adhesive properties. Since it is not used, it is also excellent in food hygiene. In addition, since the resin layer is the main component, the mother plant container can be constructed at a low cost.

In addition, in the present invention, the handle portion may be attached to the attachment portion in advance.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an actual example of the present invention, Fig. 2 is a plan view of the handle before attachment, Fig. 3 is a plan view of an example of the handle used in the present invention, and Fig. 4 is a plan view of an example of the handle used in the present invention. Figure 2 II-M line sectional view, No. 5
The figure is an explanatory diagram of the attachment part in the present invention, Figure 6 is a perspective view showing another example of the handle part used in the present invention, Figure 7 is an explanatory diagram of an example of attachment of the handle part, and Figure 8 is an illustration of the attachment part of the present invention. A perspective view of an example of a mother plant container using the lid according to the invention, FIG. 9 is a quantum surface diagram after opening, FIG. 10 is a plan view of a conventional example, and FIG. 11 is a diagram of FIG.
-1 line sectional view. 13... Notch part 14... Attachment part 15... Multilayer base material 16... Exposed portion of multilayer base material 17... - Handle part 18... Retaining protrusion part 29... Gas barrier - Polymer base material 30... Injection resin layer 51... Heat-meltable resin layer 32...

Claims (1)

[Claims] A resin layer is laminated on the surface of a base material such as a metal foil, film, or sheet that is impermeable to oxygen, water, etc., and a heat-meltable resin layer is formed on both or one side of the base material (hereinafter referred to as a multilayer base material). In the can-like container lid, the lid has a notch for opening, a mounting part for attaching a handle inside the notch, and the multi-layered lid for inserting a straw inside the mounting part. The base material has an exposed portion, and
A can-like container lid mainly made of synthetic resin, characterized in that the handle surface is provided as an individual component.