JPS5974070A - 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 The present invention relates to a container lid, particularly a prize container lid with a removable liner, and more particularly to a container lid with a marking mark provided on the inner surface of the container lid shell transferred to a cushion liner. This invention relates to a prize container lid that can be peeled off from a container lid shell.

Traditionally, prize winners have been placed on the inner surface of the top of the container lid shell for the purpose of advertising refill products, enhancing and promoting sales effects, or displaying the lot number, manufacturing date, manufacturing factory, etc.
Container lids with markings such as ``removable'' and other characters, symbols, and figures printed on them (this container lid is often referred to as a ``prize container lid'' in this specification) and are often capped with items. Conventional sweepstakes container lids usually have a sweepstakes mark printed on the inside of the top surface, and then a non-adhesive lacquer that has weak adhesion to the liner's PVC resin compound is uniformly applied. It is manufactured by filling the inner surface of the shell with a vinyl chloride resin compound sol on the flow side, spreading the sol by rotating or embossing the container lid itself, and then gelling and foaming it in a hot open environment. However,
In the case of such prize container lids, the container lid shell itself with the liner removed must be mailed to the vendor, but the container lid shell is a rigid body and the envelope may be damaged or damaged during shipping. , There is a risk of causing machine failure during various machine operations such as sorting and stamping at post offices.

As a result of extensive research into the primer used to manufacture the above-mentioned container lids, the inventors of the present invention discovered that a single layer of primer was formed by a primer lower layer containing polyethylene oxide and a paint surface layer containing vinyl chloride resin or acrylic resin. We have discovered that during the manufacturing process of container lids, the vinyl chloride resin liner is reliably adhered to the primer, and that when it is peeled off, the coating between the bottom layer and the surface layer is peeled off very smoothly.

Thus, according to the present invention, the shell has a primer layer on its inner surface and a cushion liner made of vinyl chloride resin applied to the inside of the shell, and the primer layer has a lower layer containing polyethylene oxide and a vinyl chloride resin cushion liner. It has at least two layers with a surface layer consisting of a liner adhesion paint containing resin or acrylic resin (7, and if necessary, an indicator mark is placed on the interface between the lower layer and the surface layer or on the surface layer. A container lid with a peelable cushion liner is provided, which is characterized by being provided with a printed layer of The company name, product name, and content are printed on one side of the original board with lacquer applied.
Liner and adhesive primer (lacquer) on the other side
After coating, the original plate is punched out using a punch press and formed into the shape of a container lid shell, thereby producing a container lid shell, and then a liner is applied to the container lid shell.

In the container lid of the present invention, the primer layer on the inner surface of the container lid has two layers: a lower layer containing polyethylene oxide and a surface layer of adhesive paint containing vinyl chloride resin or acrylic resin.
It is characterized by having layers.

JP-A-52-112479 discloses that in a crown equipped with a polyolefin liner, a single primer layer is formed of two layers: a lower layer containing oxidized polyethylene and a surface layer containing oxidized polyethylene and other compatible resins. This is disclosed.

According to this method, the adhesive force between these two layers becomes a raw adhesive state and releasability is obtained, but in this case, a drawback is recognized that the adhesive force between the two layers varies considerably. The reason for this is that both the bottom layer and the surface layer contain polyethylene oxide, and when the paint is applied and baked, there is interaction between the polyethylene oxides between the two layers, and this interaction causes the adhesive force between the layers to fluctuate. Seem.

Furthermore, when the surface layer contains polyethylene oxide, there is a problem in that dust is generated when the container lid shell is handled.

In contrast, in the present invention, the lower layer contains polyethylene oxide, the surface layer contains a different vinyl chloride resin or acrylic resin, and the liner is a vinyl chloride resin liner. While imparting adhesion to the liner to the surface layer, it also eliminates the aforementioned interaction between the lower layer and the surface layer, ensuring constant releasability (green adhesion) and also preventing the generation of dust. This was prevented.

In the present invention, the primer layer includes, in addition to these two layers,
If desired, one or more lacquer layers can also be present below the lower layer.

In the container lid of the present invention, a vinyl chloride resin is used as a liner material, but this vinyl chloride resin can be used alone or as a blend of two or more kinds, and if necessary, an antioxidant, Stabilizer, lubricant.

A filler, a coloring agent, etc. can be added to the liner, and if necessary, the liner can be foamed by a method known per se.

The polyethylene oxide used in the primer lower layer of the container lid of the present invention is obtained by oxidizing polyethylene or a copolymer mainly composed of ethylene in a melt or solution state, and is known per se. There are no particular restrictions on the average molecular weight of polyethylene oxide that can be used, but
Generally i,oo.

~50,000. Particularly preferably 4,000 to 10
．． Preferably, it has an average molecular weight of 0.000 to 0.000.

The degree of oxidation of the oxidized polyethylene is not critical and can vary widely, ranging from low oxygen contents of about 0.1 weight percent or less to high oxygen contents of about 10 weight percent or more. Generally, oxygen content is 0.1 to 10%, more preferably 0%.
Preference is given to 5 to 6% by weight.

It is thought that some of the bonded oxygen in such oxidized polyethylene exists in the form of carboxyl groups, and the other part exists in the form of hydroxyl groups, ether bonds, carbonyl groups, etc. Therefore, the degree of oxidation (degree of oxygen content) of polyethylene oxide can also be determined by measuring the acid value of polyethylene oxide.

The polyethylene oxide used in the present invention is generally 2 to io
It is preferable for the purpose of the present invention to have an acid value (A, V,) of 0, especially 5 to 40.

On the other hand, the density, which is closely related to the crystallinity of polyethylene oxide, is slightly affected by the oxygen content, but generally speaking, it is 0.90 to 10, particularly 0.96 to 10 f/
It is desirable to have a relatively large range of CC.

The layer containing oxidized polyethylene constituting the lower layer of the primer layer can consist only of oxidized polyethylene,
Alternatively, it may be a mixture of polyethylene oxide and other compatible resins. Other compatible resins that may be used include thermosetting or thermoplastic resins commonly used as vehicles for container lid shell lacquers, such as phenolic resins, epoxy resins, amino resins such as melamine or uria, and oleoresinous resins. Resin, alkyd resin.

Examples include acrylic resins, vinyl resins such as vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-maleic acid copolymer, and vinyl butyral, and each of these may be used alone, or two or more of them may be used. A combination of the above may also be used. Among the above resins, those generally referred to as thermosetting resins are preferred, especially phenol-type resins.
Particularly preferred are epoxy resins and phenol-epoxy-vinyl resins.

When these other compatible resins are used, the weight ratio of polyethylene oxide to the other resin is in the range of 2:98 to 99:1, preferably in the range of 5:95 to 60:40. be able to.

This primer lower layer can be provided on the entire inner surface of the container lid shell, or it can be provided only on the top surface where the cushion liner is attached.The surface layer to which the vinyl chloride resin liner is attached can be made of vinyl chloride resin or acrylic resin. Adhesive paints for vinyl chloride resin liners, which are known per se, can be used.

The primer surface layer may be provided on the entire inner surface of the container lid shell, or may be provided only on the top surface portion to which the cushion liner is adhered.

When forming the primer lower layer and the primer surface layer, the resin composition described in [7] above is dissolved or dispersed in a solvent to a concentration suitable for coating. Examples of solvents that can be used include aromatic hydrocarbons such as xylene and toluene; ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; various cellosolves; and the like.

The amount of coating film for the lower layer and surface layer of these primers is such that the nonvolatile content after drying is 5 to 5 per unit area for the lower layer.
00tny/drr? , preferably 10-100rrq
/dTr? : Regarding the surface layer, 5 to 500? W/dm
``It is advantageous to set it to 20 to 100 dtr.

The method for providing the single layer of primer -F on the container lid shell can be carried out in the same manner as in the usual container lid shell molding method. For example, one side of an original plate, such as a tin plate, a chrome-plated steel sheet, or an aluminum sheet, is coated with lacquer and the desired printing is applied, and the other side is provided with a layer of the above-mentioned primer. In this case, the primer layer may be applied directly, or alternatively, a lacquer composition containing no polyethylene oxide may be applied to the surface of the original sheet in advance, and then a primer layer may be applied on the lacquer layer. But that's fine.

When applied alone, oxidized polyethylene is best used in the form of a solution, suspension or emulsion.
For example, taking advantage of the fact that polyethylene oxide dissolves in xylene when hot, it can be made into a suspension or emulsion with K, or polyethylene oxide can be dissolved in decalin to make a solution.

In order to combine oxidized polyethylene with other resins to form a primer composition, these solutions are added to the base resin solution so that the oxidized polyethylene is uniformly and finely dispersed in the primer composition. Coating of the primer lower layer and the surface layer can be performed using coating means known per se, such as dip coating, spray coating, roll coater/bar coater.

Means such as electrostatic coating, electrodeposition coating, powder coating, etc. can be used.

The applied primer lower layer can be subjected to the next marking mark printing and surface layer coating process after simply drying, but it must be baked at a temperature of 1000C or more, preferably 150 to 250C, and then subjected to the next process. It is particularly advantageous to transfer to a process.

After applying and baking the lower layer of primer.

A surface layer is applied with or without printing the indicator marks as described below. The applied primer surface layer may be simply dried, or may be baked at the above-mentioned temperature if necessary.

In producing the prize container lid of the present invention, an indicator mark is printed on the interface between the primer lower layer and the primer surface layer or on the surface layer, if necessary. The marking mark may be printed on the surface of the primer after it has been baked, or at the stage where the surface layer has been applied and simply dried, or after it has been baked.

As the ink for printing the indicator mark, a metal printing ink that is commonly used for printing container lids can be used. For example, alkyd resin, urea resin, epoxy resin, phenolic resin.

An ink is used in which an acrylic resin, vinyl resin, etc. is used as a vehicle, and this is dissolved or dispersed in a suitable solvent (e.g., kerosene, methyl isobutyl ketone, methyl ethyl ketone, methyl cellosolve, glycol, etc.) together with pigments and other additives. .

The marking mark can be printed by a conventional method such as lithographic printing, offset printing, letterpress printing, etc., and can be printed in one color or in multiple colors, or in one layer or in multiple layers. Furthermore, the printed layer of the indicator mark may be provided on a part of the top surface, or may be provided on the entire top surface as necessary. This printing can be baked at the temperatures mentioned above if desired.

The original plate provided with the two primer layers and the printing layer of the indicator mark is further baked at the above-mentioned temperature if necessary, and then punched out into a container lid shell shape and provided with a cushion liner.

To attach the vinyl chloride resin liner, pour the sol of the liner resin compound onto the inner surface of the container lid shell, spread the sol on the top surface of the container lid shell, and then heat the sol to gel. It can also be obtained by heating the resin compound (7) to melt or soften it and then stamping it into a predetermined shape.

Next, the container lid of the present invention will be further described with reference to preferred embodiments shown in the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of an example of the container lid of the present invention and a crown at 1-. The crown shell 1 basically has a circular top surface 2 and a skirt portion 6 hanging from its periphery. and a cushion liner 4 provided inside the crown shell 1, and a printed layer 5 of an indicator mark is provided on the primer layer between the top surface 2 of the crown shell 2 and the liner 4.

2 and 6 are enlarged cross-sectional views of the top surface of the crown of the present invention, and the primer layer in the crown of the present invention can be provided directly on the top surface of the crown shell, but as shown in the figures, Preferably, it is provided on the base lacquer layer 6 for rust prevention. The single layer of brimer can be composed of two layers, a lower layer 7 and a surface layer 8, and the interface between the lower layer 7 and the surface layer 8 (FIG. 2),
Alternatively, on the surface layer 8 (FIG. 6), the printing layer 5 of the marking mark is printed.
exists.

The cushion liner 4 is melted or softened and adhered onto the surface layer 8 by the method described above.

According to the crown of the present invention having such a configuration, the primer lower layer 7 firmly adheres to the crown top surface 2, and the primer surface layer 8 firmly adheres to the cushion liner 4 melt-adhered thereon. Also, primer bottom layer 7
The adhesion between the primer surface layer 8 and the primer surface layer 8 is not as strong as shown on the left (bare adhesion state), and when the cushion liner 4 is peeled off from the crown top surface 2, the primer lower layer 7 and the surface layer 8 are separated. was discovered. In this case - even if the printed layer 5 of the marking mark is present at the interface between the lower layer 7 and the surface layer 8, as shown in FIG. 8 is stronger, so when the cushion liner 4 is peeled off, it adheres to the surface layer 8 and peels off.

Thus, according to the container lid of the present invention, in the case of a container lid of the type shown in FIG. 2, as shown in FIG. 4, and in the case of a container lid of the type shown in FIG. like,
When the cushion liner 4 is peeled off, the marking mark can also be peeled off together with the markings transferred to the liner.

However, the prize container lid according to the present invention has a colored surface layer i by coloring the surface layer and/or the cushion liner with a pigment such as carbon black or titanium oxide.
The peeled off liner is adhered to the liner so that it can be distinguished from a liner with an uncolored surface layer.The peeled colored liner itself is distinguishable from an uncolored liner. By having a prize effect, printing of an indicator mark can be omitted, especially when the presence of an indicator mark on the peeled-off cushion liner is not required.

In addition, by applying the present invention to a prize container lid that has a primer surface layer and/or a liner with a color-concealed primer surface layer and/or a liner, the liner can be peeled off by applying prize printing between the primer lower layer and the top surface of the container lid. By doing so, it is possible to read the hidden prize printing, and it is possible to create a prize effect with Jin.

Next, the present invention will be further explained by examples.

Example 1 One side of an electroplated tin plate material was coated with 70 Jl of vinyl chloride-vinyl acetate copolymer, 25 parts by weight of a bisphenol A type epoxy resin with a molecular weight of about 370, an amine resin, and a resin (butylated urea) as an undercoat lacquer for rust prevention. A paint consisting of 5 parts by weight of resin) and a solvent (a mixture of methyl isobutyl ketone and methyl cellosolve in a volume ratio of 2=1) was added to
drrr? It was washed and applied to a dry coating amount of . On top of that, a primer lower layer with a weight average molecular weight of 650
A primer paint made by dispersing 15 parts by weight of polyethylene oxide, which has an acid value of 1 to 0, a density of 0.98y/CC, and an oxygen content of 0.56%, in 85 parts by weight of a solvent (xylene) is dried. Is the coating amount 5W/cjrr? Then, it was heated in a gas oven at 190C for 1
Baked for 0 minutes.

Next, rosin-modified alkyd resin (vehicle), carbon black (
pigment), manganese chloride (dryer') and kerosene (
Characters were lithographically printed using a metal printing ink consisting of a solvent) and washed and sealed in a gas oven at 1501r for 10 minutes. Furthermore, as a primer surface layer, 55 parts by weight of vinyl chloride-vinyl acetate copolymer, molecular weight 37
45 parts by weight of an alkaline resol type phenol resin obtained by the reaction of 15 parts by weight of a bisphenol A type epoxy resin of 0.0 and an equal part by weight of phenol and O-cresol were mixed with a solvent (the volume ratio of methyl isobutyl ketone and methyl cellosolve is 2: Mixture of 1) 580 parts by weight of the paint was dissolved to give a dry coating amount of 80 cm/drr? It was applied and baked in a gas oven at 190 tr for 10 minutes. The thus treated tin plate is molded into a crown shell with the primer coated side facing inside, and a sol of vinyl chloride resin compound (polyvinyl chloride resin = 60 parts) is placed inside the crown shell obtained using a crown lining device. ,
Approximately 0.67 parts of dioctyl phthalate (40 parts and 7 parts of azosica-bonamide) were poured into each crown, and the crown was spun (250 rF) to uniformly spread the sol over the entire top surface of the crown shell. Thereafter, the mixture was heat-treated for 1 minute in an oven set at a furnace temperature of 20 Orr to cause gelation and foaming. When the crown cushion liner thus obtained was peeled off from the King 5D shell, a liner on which the marking mark was clearly transferred was obtained.

Also, the liner peel strength at this time is 0.06 to 0.12
Ky/cm.

Example 2゜ Acrylic resin (trade name: Hytaloid 1'l 05) was applied as a primer surface layer on the primer lower layer and indicator marks obtained in the same manner as in Example 1 above, and the solid content was 60% by weight. Apply the paint dissolved in the above so that the dry coating amount is 50~/d-.The dried board is molded into a crown shell with the primer coated side facing inside, and the inside of the resulting crown shell is coated. A vinyl chloride resin compound is poured into the mold in the same manner as in Example 1, and gelation and foaming is performed in the same manner as in Example 1. When the crown cushion liner thus obtained was peeled off from the crown shell, a liner with the marking mark clearly transferred thereto was obtained.

Moreover, the peel strength at this time was 0.05 to 0.10%.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view of the crown of the present invention, FIG. 2 is an enlarged cross-sectional view of the top portion of one embodiment of the crown of the present invention, and FIG. 6 is a schematic sectional view of another embodiment of the crown of the present invention. FIG. 4 is an enlarged cross-sectional view of the top portion, FIG. 4 is a diagram showing the state in which the liner of the crown of the type shown in FIG. 2 is removed, and FIG. It is a figure which shows the state of taking. 1 Crown shell 2 Top surface 6 Skirt portion 4 Cushion liner 5 Indication mark 6 Base lacquer layer 7 Primer lower layer
8 Primer surface layer 9 Surface lacquer layer drawings (Contents t,: No changes) Fig. 1 □ / Fig. 2 Fig. 3 Otsu Fig. 4 Fig. 5 Procedural amendment November 15, 1982 4. Mr. Kazuo Wakasugi, Commissioner of 'l'M Agency1, 'jG Indication Patent Application No. 1982-995232, Name of Invention Container Waka 3, Supplement 1 [; Applicant 4, agent 〒105 5, tJ request for notice of reasons for refusal, October 250, 1982 (Despatch 1-1) 6, Applicable article section and drawing 7 of the subject document of Supplementary IT MO, Attachment with contents of amendment street

Claims (2)

[Claims] (1) Inner surface [consisting of a shell with a single layer of primer and a cushion liner made of vinyl chloride resin applied to the inside of the core shell; 1. A container lid comprising at least two layers, a surface layer consisting of a liner adhesive coating containing [-1] and said cushion liner being releasable from between said lower layer and said surface layer. (2) Consists of a shell with a primer → layer on the inner surface and a cushion liner made of vinyl chloride resin applied to the inside of the shell, and the primer layer consists of a lower layer containing polyethylene oxide and a vinyl chloride resin or acrylic resin cushion liner. It has at least two layers, a surface layer consisting of a liner adhesive coating containing resin, and a printed layer of an indicator mark is provided at the interface between the lower layer and the surface layer or on the surface layer. A container lid having a peelable cushion liner.