KR20110009323A - Air tight sealing packages - Google Patents

Abstract

PURPOSE: Air-tight sealing packages are provided to obtain complete airtight envelope by preventing the generation of a ventilation path caused by the distortion of a fastener in the heating-pressure. CONSTITUTION: A pair of fasteners(12) include male/female fastener units, and a fastener end portion(18) is adjacent to an outer edge. The end portion of the fastener is become open to the dotted lines(24,26) due to the heating-pressure between the both sidewalls of the envelope. The end portion of the fastener forms an integrated bonding portion, and a portion(28) adjacent to the inner portion of the envelope is melted through the heating of a mold. Accordingly, the melted fastener is integrated with the film.

Description

Airtight Seal Bag {AIR TIGHT SEALING PACKAGES}

The present invention relates to an airtight sealed bag, and more particularly, to an airtight sealed bag bonded so that both ends of the band-shaped body of the fastener are kept airtight.

In general, a sealing bag made of a synthetic resin film is manufactured by attaching a fastener to the synthetic resin film. The fasteners used in such a hermetic sealing bag are manufactured by attaching the band-shaped portion of the fastener having the male and female projections on the opposite surface of the band-shaped body to the inner side surfaces of both side walls of the synthetic resin film constituting the side wall of the envelope. When combined, the air flow was blocked at the binding site. Conventionally, such an airtight envelope is welded by welding the both edges of the envelope with a mold having a constant thickness.

The problem of the above-described conventional hermetic sealing bag is that the male and female fastener projections are crushed and crushed when heat-compressing the sidewall of the envelope with the female and female fasteners bonded together to manufacture the envelope. It is difficult to completely seal the air flow path connected to the upper and lower. Therefore, the airtight sealing bag manufactured by the conventional method has a phenomenon of leakage at the adhesive site over time, so that a high quality technique is required to obtain a completely airtight sealing bag, and a problem in which a large amount of defective products are not produced is shown. .

Therefore, there is a need for a method for producing a bag that can be easily manufactured and in which airtightness is completely maintained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing an airtight sealed bag which can be easily manufactured while maintaining complete airtightness, and an airtight bag manufactured by the above-described method.

An object of the present invention described above is to heat-compress both ends of fasteners using a heat press plate having a U-shaped groove when heat-sealing a fastener-attached synthetic resin film having male and female fastener protrusions bonded to each other. The outer end portion of the fastener is bonded by heat compression, but the portion close to the inner surface of the envelope is not bonded by pressing but is melt-bonded by the heat of the mold itself. Is achieved.

The present invention is a step of adhering a band-type fastener body having a male and female hook on the inner surface of both side walls made of a synthetic resin film, the side edges of the bag with the band-type fastener is pressed in the upper and lower heating molds to bond the side edges of the bag In the envelope manufacturing method comprising a, the step of heat pressing the side edge of the bag using a heating mold having a U-shaped groove end of the fastener close to the outer periphery of the bag to be melt-bonded by heat pressing and close to the inner surface of the bag The portion is constructed by a method characterized in that the fastener is melt-bonded by the heat of the mold itself so as not to be compressed.

The bag is composed of a synthetic film, the synthetic film is typically used a laminated film used when producing a synthetic film envelope.

The fastener adhered to the inner surface of the bag is a band-type fastener, and the male and female hooks are formed to protrude from the band-shaped main body. When the edges of the film are bonded by heat compression, the female fastener is heat-compressed in a bonded state.

According to the present invention, when compressing the envelope edge by heat, it is heat-compressed using a mold having a U-shaped groove.

The heating die was formed such that the U-shaped grooves were opened to the mold surface and the mold inner circumferential side inside. The above-mentioned grooves are preferably formed such that the width of the adhesive portion that heat-presses and adheres the peripheral portion of the film is about half, but may be shorter than that. This groove was formed to have a length such that the fastener was not pressed when heated and pressed. If the depth of the groove is shallower than the thickness of the fastener, the depth of the groove is the same as that of the fastener, since the fastener is crushed when the heat press is pressed and the sealing effect is not properly exhibited. Or slightly shallower than the fastener thickness.

When heat-compressing the end of a film, it puts so that a fastener may be located in the position of the groove | channel formed in the metal mold | die, and heat-compresses. At this time, the part pressed by the hot pressing mold is bonded while being crushed by the fastener, but in the groove part, the fastener is not crushed and melted by melting in the heat of the mold itself.

According to this method, the fasteners are not crushed at the inner periphery of the adhesive part of the bag, but are integrally bonded as the male and female fasteners are melted by the heat of the mold itself. .

According to the present invention, in the case where the edges of the envelopes are bonded by heat-compression bonding, there is no aeration caused by the fasteners being crushed, so that an airtight envelope is obtained in which the liquid or air inside the envelope does not leak out.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 is an enlarged cross-sectional view of a plan view and a circular portion of an envelope according to the present invention. According to Fig. 1, the envelope of the present invention includes an envelope 10 composed of a conventional synthetic resin film, and a fastener pair 12 composed of a male and female fastener is adhered to an inner surface of the open end of the envelope.

FIG. 2 is an enlarged sectional view taken along line AA of the circular part of FIG. 1, according to FIG. 2, wherein the fastener pair 12 described above is comprised of conventional male and female fastener units 14, 16, and a fastener close to the outer edge of the envelope. The end portion 18 is glued and integrally bonded to the end portion 18 by being heated and pressed between the side walls 20 and 22 of the bag to the dotted lines 24 and 26 shown in the circle A portion of FIG. The portion 28 close to the inside of the bag is integrally formed with the film while the fastener is melted by the heat of the mold without heat pressing.

3 is an enlarged sectional view taken along line B-B of the circular portion of FIG. 1, and according to FIG. 3, it can be seen that the fastener end adjacent to the side edge of the envelope is melted and integrated.

 4 and 5 are plan schematic diagrams showing the manufacturing process of the bag according to the present invention. According to FIG. 4, the mold 30 has a U-shaped groove 32. This groove was formed to open toward the mold surface and the mold inner peripheral surface. The synthetic resin film 34 to be bonded is composed of two films forming the front and rear sidewalls of the bag, and each film has a fastener 36 formed with a male and female hook 40 protruding from the inner surface of the band-shaped body 38. ) Is attached. The aforementioned films are placed on the mold 30 in a state where the female and female hooks of the fastener are coupled to each other.

5 is a plan view showing a state in which the film 34 is placed on the mold 30, in which the hook 40 of the film is positioned on the groove 32. As shown in FIG. In this state, when heat-compression with an upper mold (not shown), the portion 18 close to the outer periphery of the envelope is bonded while being heated and pressed together with the upper and lower portions of the groove, but close to the inner surface of the envelope positioned on the groove 32. The portion 28 is not pressed but melted by the heat of the mold itself, and thus is bonded as in FIGS. 2 and 3.

According to such a structure, when the mold without a groove is used in the past, the inner end portion of the fastener is crushed, and a phenomenon in which air passages connected to the fasteners up and down is eliminated. Thus, a completely airtight bag is obtained.

1 is a front view of an airtight sealed bag according to the present invention,

2 is a cross-sectional view taken along line A-A of the circular portion of FIG. 1;

3 is a cross-sectional view taken along line B-B of the circular portion of FIG. 1;

4 is a plan view of a mold and a film used in an envelope according to the present invention;

5 is a plan view showing a manufacturing process of the envelope according to the present invention.

Claims (2)

Bonding a band-type fastener body having a male and female hook to the inner surface of the side wall of the side bag made of a synthetic resin film, the step of bonding the side edge portion of the bag with the band-type fastener attached by pressing in the upper and lower heating molds In the step of heat-compressing the side edges of the bag, the fastener portion 18 close to the outer periphery of the bag using a heating mold having a U-shaped groove is bonded by heat pressing and the portion 28 close to the inner surface of the bag A method of manufacturing an airtight bag, characterized in that the fastener is melted and bonded by heat of the mold itself without being pressed. In an envelope composed of a synthetic resin film formed by attaching a fastener having a male and female hook to an open end of the envelope, a fastener portion 18 close to the outer periphery of the envelope is bonded by heat compression, and a portion 28 close to the inner surface of the envelope is compressed. An airtight sealing bag, characterized in that it is melt-bonded by heat of a mold in an unprocessed state.

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