JPH0121328Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a label provided with an aluminum vapor-deposited layer, and particularly to a label that can be attached to bottles to be recycled and used and has excellent bottle-washing properties.

Conventional labels for beer bottles, etc., used a material consisting of aluminum foil and paper, but labels using aluminum foil are expensive and less suitable for bottle washing, so in recent years aluminum vapor deposition has been used. Paper labels began to be used.

Generally, with vapor-deposited paper, a pre-coat layer is provided on the paper base material before vapor deposition to smooth the surface and provide an aluminum vapor-deposited layer. This precoat layer used a nitrocellulose resin lacquer, an acrylic resin, or a vinyl chloride-vinyl acetate copolymer resin.

However, with the aluminum vapor-deposited label provided with the precoat layer, the label could not be peeled off successfully when the bottle was washed with a 1-4% concentration of caustic soda solution after the bottle was used, resulting in problems in its suitability for bottle washing.

The object of the present invention is to overcome these conventional drawbacks and to provide a label that is suitable for bottle washing even when an aluminum vapor-deposited layer is provided.

The present invention will be explained below with reference to the drawings.

As shown in FIG. 1, the present invention is based on a base paper 3 in which a clay coat layer 2 is provided on a base paper 1, a precoat layer 4, an aluminum vapor deposition layer 5 on the clay coat layer 2,
This label has excellent suitability for bottle washing and is formed by sequentially providing a primer layer 6, a printing layer 7, and an overcoat layer 8.

Here, the base paper 3 has an underwater elongation of 2.5 when immersed in water.
% or less In particular, it must be 1.5% or less, and 2.5%
When the base paper 3 with the above elongation is used, it can be attached to a beer bottle, etc., and when it is cooled in a refrigerator, the water droplets adhering to the bottle surface will cause the aluminum vapor deposited layer 5, the printed layer 7, and the overcoat provided on the base paper 3 to be attached. Cracks occur in layer 8, degrading the appearance.

The precoat layer 4 is made of a primer agent in which a nitrocellulose resin is mixed with a fatty acid ester such as a phthalate ester, an adipate ester, or a sebacate ester in an amount of 5 to 60% by weight, preferably 20 to 50% by weight.

By using a nitrocellulose resin mixed with 5 to 60% by weight of fatty acid ester, water resistance and bottle washability are excellent.

If the amount of fatty acid ester is 5% by weight or less, the bottle washability will be excellent, but the water resistance will be insufficient. Moreover, if it exceeds 60% by weight, the water resistance is similarly insufficient, resulting in labels falling off, wrinkles, and cracks during refrigeration.

A thickness of 300 to 1000 Å is sufficient for the aluminum vapor deposited layer 5.

The primer layer 6 provided on the aluminum vapor deposited layer 5 is made of a resin with good alkali solubility, such as silica, a nitrocellulose resin, a mixed resin of a nitrocellulose resin and a fatty acid ester,
Any resin obtained by further adding an alkyd resin to the mixed resin is preferable.

The printing layer 7 is made of an ink containing a nitrocellulose resin, a polyamide resin, or a mixed resin thereof as a vehicle, and further containing maleic acid. If the amount of maleic acid added to this ink is about 6% or less, sufficient alkali solubility can be imparted to the ink.

Finally, the overcoat layer 8 is made of a resin made of the vehicle of the ink used in the printing layer 8,
It is an alkali-soluble layer.

Next, an example of the label of the present invention will be explained.

A pre-coat agent made by mixing 32.8% by weight of dioctyl sebacate with nitrocellulose resin and forming a solution was applied onto a base paper made of Comorant VMST (underwater elongation 1.2%) (manufactured by Fuji Kako) using a gravure coating method, and dried. Provide a precoat layer.

A 500 Å aluminum evaporated layer was formed on this precoat layer, and a printing layer was formed using an ink containing polyamide resin as a vehicle with 6% maleic acid added. After that, a resin mixture of nitrocellulose resin and alkyd resin was dissolved. This is a label coated with an overcoat layer.

When the above label was washed with a 4% caustic soda solution at 70°C, the label peeled off in 3 minutes, and no cracks appeared in either the overcoat layer or the vapor deposited layer.

Since the label of the present invention has the above-described structure, it has excellent water resistance and suitability for attaching labels, and is more beautiful at a lower price than conventional labels using aluminum foil.

The suitability of this label for labeling is 500%, since conventional labels using aluminum foil tend to wrinkle easily.
However, since the label of the present invention retains the flexibility of paper, it can be applied at a rate of 1000 sheets/minute.

In addition, because the amount of aluminum used in the label is small, the caustic soda solution used for washing bottles is less fatigued and can be used for a long time.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the label of the present invention. DESCRIPTION OF SYMBOLS 1... Base paper, 2... Clay coat layer, 3... Base paper, 4... Precoat layer, 5... Aluminum vapor deposition layer, 6... Primer layer, 7... Printing layer, 8...
...Overcoat layer.

Claims (1)

[Claims for Utility Model Registration] (1) A pre-coat layer consisting of a primer mixture of nitrocellulose resin and fatty acid ester on a base paper with a clay coat layer, an aluminum vapor deposited layer, a primer layer, and a nitrocellulose resin. , a printing layer made of an ink using a polyamide resin or any one of these mixed resins as a vehicle, and an overcoat layer made of a nitrocellulose resin, a polyamide resin, or any one of these mixed resins are sequentially provided. Label. (2) The label according to claim 1, wherein the precoat layer is made of a primer mixture of nitrocellulose resin and a fatty acid ester in an amount of 5 to 60% by weight.