JP2594696Y2 - Aluminum foil for press-through pack - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aluminum foil for backing a press-through pack used for packaging precision machine parts, electronic parts, pharmaceuticals, confectionery and the like.

[0002]

2. Description of the Related Art As shown in FIG. 2, a press-through pack is provided with a large number of pockets 7 in a storage body 6 in which a storage body 8 for precision machines, electronic parts, pharmaceutical capsules, tablets or confectionery is stored. The backing aluminum foil 1 is adhered to the outside of the pocket 7 and sealed. When the package is opened, the storage object is pushed out from the outside of the pocket 7 with a finger to pierce the backing aluminum foil 1 with the storage material and take out the storage product. It is like that. By the way, the aluminum foil used for the backing aluminum foil has conventionally been made of 1N3 having a thickness of about 15 to 25 μm for the sake of easy removal of stored items.
Aluminum foil hard like 0H-H ₁₈ has been used. The heat sealing layer 3 is provided on one surface of such an aluminum foil as a base material, and the printing layer 5 and the surface resin layer 4 are provided on the other surface.

[0003] For this reason, backing when the aluminum foil 1 is packaged in an automatic packaging machine because there is less growth, less likely to tear easily after pitch together, further storage products backing aluminum 1 is easily torn accommodating main body at the time of taking out the 6 and sometimes swallowed with tablets or capsules in the case of medicines and the like.

[0004]

[Problem to be Solved by the Invention] The present invention is easy to adjust the pitch when filling in an automatic packaging machine when filling with a pitch specification, and the backing aluminum foil is torn off from the storage body when taking out the contents. With the aim of developing no aluminum foil for press-through packs.

[0005] The invention aims to achieve the above object by forming a heat-sealable layer coated with a thermoplastic adhesive on one side and a thickness of 2 to 2 on the other side.
Tensile strength 1 with 10 g / m ² applied surface resin layer
0 kg / mm ² or less, elongation 5% or more, thickness 15-30 μm
m, wherein the aluminum foil and the backing aluminum foil for a press-through pack are characterized by using an aluminum foil of 0.8 to
This was achieved by developing a backing aluminum foil for a press-through pack as described, which is an iron alloy-based aluminum soft foil containing 2.0%.

[0006]

The present invention will be described below with reference to the drawings. As shown in FIG. 1, the backing aluminum foil 1 has a heat sealing layer 3 on one side of an aluminum foil 2 and a printing layer 5 and a surface resin layer 4 on the other side.

The aluminum foil 2 has a tensile strength of 10 kg.
/ Mm ² Hereinafter, it is an aluminum foil having an elongation of 5% or more and a thickness of 15 to 25 μm. Especially considering workability, protection of stored items, properties that do not separate from the storage body, etc.
Most preferred is an aluminum-iron alloy-based aluminum foil having an iron content of 0.8 to 2.0%. Tensile strength 10
Soft aluminum foil, such as kg / mm ² or less and elongation of 5% or more, is considered to be the minimum necessary for protection of stored items. Below this elongation, pitch adjustment becomes difficult.

The heat seal layer 3 is mainly composed of vinyl chloride as a vinyl resin, a vinyl chloride-vinyl acetate copolymer, and chlorinated polypropylene, carboxylated polypropylene or a mixed resin thereof as a polypropylene resin. It is made of a usual thermoplastic adhesive such as a resin.

The surface resin layer 4 may be composed mainly of, for example, nitrocellulose, acrylic resin, epoxy resin, or a mixture thereof, and may be mixed with a filler, a coloring pigment, and the like.

Further, additives such as low molecular weight polyethylene wax or a hardening agent such as melamine can be added to improve the surface slipperiness of the surface resin layer 4.
² to 10 g / m ² , preferably 2 to 6 g / m 2
^The surface resin layer 4 is formed by ^two coatings.

Although FIG. 1 shows a type in which the printing layer 5 is provided directly on the aluminum foil 2 and the surface resin layer 4 is applied thereon, first, the surface resin layer 4 is applied on the aluminum foil 2. And vice versa, so as to print later.

[0012]

EXAMPLE A 4 μm-thick vinyl chloride-vinyl acetate copolymer adhesive was applied as a heat seal layer, and 6 g / m ^{2 of an} acrylic resin was applied as a surface resin layer. Aluminum foil shown in Table 1 as backing aluminum foil, diameter 8m
100 sheets were prepared by packing sugar-coated tablets having a thickness of 4 mm and a thickness of 4 mm into press-through packs of 10 tablets.

Then, the tablet was pushed from the pocket side to break through the backing aluminum and test whether the backing aluminum foil was torn. Table 1 shows the results.

Table 1 ┌─┬────────────────┬────┬────┬─────┐ │ Actual │ Aluminum foil │ Tensile strength │ Elongation │ Torn off foil │ │ Test │ │ (Kg / mm ² ) │ (%) │ │ ├─┼────────────────┼────┼─── ─┼─────┤│1│alloy foil-O 20μm│9.4│7.8│none││2│alloy foil-O 25μm│9.4│11.8│none││3│AlN30H -O 30 μm | 7.0 | 5.4 | None | | 4 | AlN30H-H ₁₈ 17 μm | 18.3 | 2.5 | Yes | | 5 | AlN30H-H ₁₈ 20 μm | 17.9 | 2.7 | Yes │ 実 験 Experiments 1 and 2 cannot be digitized, The operation is extremely smooth during packaging. It was.

[0015]

[Effects of the Invention] Back-pasted aluminum for press-through pack packaging
Tensile strength on nickel foil10kg / mm ^Two Less than 5%
Above, a soft aluminum foil with a thickness of 15 to 30 μm
When using, when packing and filling with pitch specifications,
Pitch adjustment is easy because the elongation is large compared to
Easy to operate. Also, when removing the contents, paste the back
The aluminum foil is not torn and accidental ingestion can be avoided.

[Brief description of the drawings]

FIG. 1 is an enlarged cross-sectional view showing one embodiment of a backing aluminum foil of the present invention.

FIG. 2 is a sectional view showing a structure of a press-through pack.

[Explanation of Signs] 1 Backing aluminum foil 2 Aluminum foil 3 Heat sealing layer 4 Surface resin layer 5 Printing layer 6 Storage body 7 Pocket 8 Tablet

Claims (2)

(57) [Scope of request for utility model registration] 1. A heat-sealing layer coated with a thermoplastic adhesive on one side, and a coated surface resin layer having a thickness of ² to 10 g / m ^{2 on} the other side, and a tensile strength of 10 kg / mm ² or less.
An aluminum foil for press-through packs, characterized by using an aluminum foil having an elongation of 5% or more and a thickness of 15 to 30 μm. 2. The backing aluminum foil for a press-through pack according to claim 1, which is an iron alloy-based soft aluminum foil containing 0.8 to 2.0% of iron.