JPS6193064A - Package - 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 Applicability The present invention relates to a package for contents such as a moisture absorbent or a metal (IJ) material, in which moisture permeability from the end face of a sealed portion is a problem.

``1 rice 9'' Conventionally, moisture absorbents such as calcium chloride, or alkali metals and alkaline earth metals such as gold tetrasodium, react rapidly with moisture present in the air *J
′! it (hereinafter referred to as "activation substance") is the fourth figure in the drawing.
It is distributed in a sealed package as shown in the figure. Fig. 3 shows the shape of the seal part in Fig. 4, that is, a heat-sealable m-finger layer (2) is formed on the inner surface of a moisture-proof sheet material (1) such as aluminum foil. The formed colored bag is sealed by sealing the periphery thereof.

However, as mentioned above, the activation substance has extremely strong reactivity with moisture in the air, especially alkali metals and alkaline earth metals, so even a small amount of moisture that passes through the end face of this seal will degrade it. However, to date, no fully satisfactory packaging has existed.

The present invention was made due to the circumstances described above.

Therefore, it is an object of the present invention to provide a package that has lower moisture permeability from the end of the sealed portion.

Means for Solving the Problems The present invention provides a package that stores contents inside and seals the opening.Of the total width (a+b) of the seal line, 50% or more The thickness of the sealing layer of the partial molecule bl is a constant thickness (dl), and the part below 50% from the outside (
To provide a package characterized in that the thickness of the sealing layer of Al is less than the above a, and the thickness decreases toward the outside.

The present invention will be described below with reference to the drawings. The external shape of the package of the present invention is approximately the same as that shown in No. 41A, but
The seal portion has a shape as shown in FIG.

In other words, the color value materials used in this packaging are metal foils such as aluminum foil, moisture-proof sheet materials such as silicon oxide-deposited plastic films or moisture-proof plastic films (having at least one layer of The inner layer is formed with a heat-fusible 14 oil layer (sealing layer) 12) made of a two-handed (meth)acrylic cough copolymer, an ionomer, or a polyolefin graft-modified with acrylic acid or maleic acid. The layers (2) are sealed together by heat and pressure. At this time, this seal width (a + b)
50% or more from the inside (the thickness of the heat seal layer (2) of BL is a constant thickness, 71 < tdl,
By doing this, even if the packages are stacked and sag, the shape will not collapse and the sealing strength will be strong. In addition, the thickness of the seal layer (2) at a portion of the seal width (a+b) that is 50% or less from the outer eye 11 is less than the above a, and has a tapered shape so that it gradually decreases at an angle θ toward the outside. By doing so, the permeation of water vapor from the ends can be reduced. In addition, the seal width (
a+b) may be, for example, about 51, and the sealing method may be, in addition to the above-mentioned heat sealing by heating and pressurizing, heat fusion by ultrasonic waves, heat fusion by high frequency, impulse sealing, etc.

In addition, in order to form the seal wire into this shape,
As shown in Figure 2 (A), a seal bar (3) with a shape corresponding to the shape of the seal ++d may be used, or as shown in Figure 2 (B).
As shown in Figure 2, there is a method in which the seal is first sealed into a flat shape, and then only the outer portion thereof is heated and pressurized again using a tapered silver bar. In addition, as shown in Figure 42 (c), the seal area is taken wider than the intended seal line and is knotted into a flat shape, then sealed with a convex seal bar, and then the unnecessary part is cut with a cutter (4). Alternatively, as shown in Figure 2, you can seal with a seal bar shaped like the one shown in the figure that is wider than the desired seal line, and then cut and remove the unnecessary part. good.

The content according to the present invention is the above-mentioned activating substance, but in addition to this, it is also possible to enclose a substance that does not have an adverse effect on the activating substance.

Example ``12μ thick polyester film / 9μ thick aluminum foil / 500μ thick Atmer (Mitsui Petrochemical ■
A laminated film having a layer structure of ``polyethylene graft-modified with maleic acid'' was used, and calcium chloride 5y was added to the contents, and the conventional seal shape (Fig. 6) and the seal shape of the present invention (Fig. 1) were used. Then, seal each side on three sides,
It was stored at a temperature of 40C and a humidity of 90%, and the increase in mass per potential time was compared. The size of the molded product is 100 mm x 100 g, and the seal width is 51, as shown in FIG. The seal shape of the present invention has a non-tapered seal width (bl of 3.51 and a taper angle of 1
It was set to 5°.

Effects of the invention By using the seal shape according to the present invention,
It is possible to suppress moisture permeability from the end face of the seal portion and provide storage stability of the activated product d without deteriorating the seal strength.

[Brief explanation of the drawing]

Figure 1 of Figure 1fr is an explanatory diagram of the sealing part of the package of the present invention, and Figure 2 is a sealing method. Explanatory diagram for explaining, No. 6
The figure is an explanatory view of a conventional seal portion, and FIG. 4 is a perspective view of a conventional package and a package of the present invention.

Claims (1)

[Claims] 1) In a package that stores contents inside and seals the opening, the thickness of the seal layer in a portion (b) of 50% or more from the inside of the total width (a + b) of the seal line is constant. A packaging body characterized in that the thickness of the sealing layer (a) in a portion (a) of 50% or less from the outside is not more than the above d and gradually decreases toward the outside.