JPH0356248A - Fastener bag and its manufacture - Google Patents

Abstract

PURPOSE:To obtain excellent sealing property by a method wherein a male fastener and a female fastener are fittably attached to a one sealing material while a cut extending widthwise direction of a bag is formed at an intermediate part of a welding part of both fasteners to the sealing material. CONSTITUTION:To take out contents from a fastener bag first, the tip of a tab 15 is pulled in a direction of an arrow to form an opening 14 on an upper film of a bag-like container. At this time an auxiliary film 16b is pulled out as well as an upper film 11 facing the part is peeled off so that a cut piece 17 is formed and the opening 14 is formed on the bag. At this time, auxiliary films 16a, 16c remain on the upper film, and a part of the auxiliary film 16c overlapping on an auxiliary film 16b is made to protrude into the opening 14. Thus by adhering auxiliary film on the upper film, formation of the opening is easy as well as the formed opening can be mechanically strengthened.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a container for storing contents that require sealed storage, such as foods that dislike humidity and volatile pharmaceutical crystals, and an apparatus for manufacturing the container. In particular, the present invention relates to a zipper bag for opening and sealing a container using a zipper, and a method for manufacturing the same.

[Conventional technology]

Traditionally, containers have been used to store contents that require secret storage, such as foods that dislike moisture or volatile chemicals, by stacking two pieces of packaging material together and heat welding the edges to create a bag-like container. Attach a male zipper to one packaging material of a shaped container and attach it to the other packaging {A
A zipper bag is used in which a female zipper is attached to the container, and the container is opened and sealed by fitting and releasing the male and female zippers.

As shown in FIG. 7, a conventional method for manufacturing such a zipper bag includes extruding and molding a female zipper 72 at one end of the bag 71- and a female zipper 73 at the other end, or by extruding and molding a female zipper 73 at the other end of the bag 471. A method has been used in which the male type fastener 72 and female type fastener 73 are bonded together, and then the wrapper 71- is folded in half and the edges of the wrapper are heat-fused.

However, if the male type fastener 72 and the female type fastener 73 are even slightly misaligned when folding in half using the method described in ``2'', it will interfere with the fitting of the male type fastener 72 and female type fastener 73, resulting in a defective product. It has the disadvantage of being bulky.

A method for solving the second defect is to fit the ρJ portion 81a of the male fastener 81- into the recess 82a of the female fastener 82, as shown in FIG. The base portion 84b of the fiber-type fastener 81 and the base portion 82l of the female-type fastener 82 are attached to the heating tube 83.8.
3. The packaging material 85 is pushed against each other by the pressing plate 8484.
．． 85 is used to heat and press the material and heat-weld it to the packaging material.

[Problems to be Solved by the Invention] However, in the above method for manufacturing a zipper bag, the base portion 8 of the male type fastener and the female type fastener is
]. b, 82b from the inside, the male zipper's ρ part 8 ]. a and female fastener recess 82a
It was not possible to heat it from both sides because it would melt or weld. In addition, the base portions 8 of the male type fastener and female type fastener]. b. 82b is heated by sandwiching the rubber pressing plate 84, so when heating, the rubber pressing plate 84
It was not possible to apply even pressure.

For this reason, there was a problem in that the male type fastener and the female type fastener were likely to be insufficiently welded, and therefore the contents were likely to be insufficiently hermetically sealed.

Furthermore, when the male type fastener and the title type fastener fit together, the thickness of the mating part becomes considerable, so the heat required to form the side part of the bag-like container may not be sufficient in some parts of the fastener. There was a problem. To solve this problem, it is possible to partially crush the fastener by heating it with ultrasonic waves or a heating plate, but this process complicates the equipment, reduces line speed, and is not suitable for packaging materials. There was a problem that there was a risk that the printing on the shrine could be damaged and discolored.

In view of the above-mentioned points, an object of the present invention is to provide a fastener bag with excellent sealing performance and a method for simply and quickly manufacturing the fastener bag.

[Means to solve the problem]

Therefore, the present invention aims to seal and open a bag-like container formed by overlapping two packaging materials of a zipper bag and gluing the periphery thereof. In a fastener bag which is made by fitting and releasing a type fastener and a female type fastener, the male type fastener and the female type fastener are fitted to one package}l in a fitable manner, and the welded portions of both the fasteners to the packaging material are attached. A method for manufacturing a zipper bag is provided in which a cutout part extending in the width direction of the bag is formed in the middle part of the bag, and a cutout part of a predetermined length is formed in the width direction of the sheet-like package. Weld the widthwise ends of the combined fastener to a sheet-like packaging material, with the male and female fasteners aligned so as to straddle them, and create a packaging material with the male and female fasteners attached. was divided into two from the center in the width direction, and one packaging material to which a male type fastener and a female type fastener were attached was overlapped with the other packaging material to form a bag-like container.

[Effect]

Since the zipper bag according to the present invention has a male zipper and a female zipper fitted together and adheres to one side of the opposing wrapper, it is possible to heat the zipper from both sides without melting the joint part of the zipper. In addition, since the first part of the zipper is relatively thin, there is no possibility of insufficient welding. Therefore, this method can quickly,
It becomes possible to reliably provide a zipper bag with excellent tightness.

〔Example〕

Hereinafter, 6 embodiments of the present invention will be explained with reference to the drawings. explain.

Figures ↓ and 2 are zipper bags according to the present invention ↓0
This zipper bag 1-0 has an upper film lla and a lower film 11-b or its peripheral edge 11c.
It is thermally welded to form a bag shape. This film ILa. For example, a packaging material such as a laminate film is used for 1 lb.

A male fastener 12 and a female fastener 3 made of plastic are attached to the back side of the upper film 11a of the zipper bag ↓0. This male type fastener 12 has a base portion ↓2a and a convex portion 12b, and the base portion 12a is connected to the upper film 1. It is attached by heat welding to the back side of la. In addition, the female type fastener is the base part Kei 3a.
and a recessed portion 13b, and the base portion 13a is connected to the upper film l.
The convex part 12b of the male type fastener and the recessed part 13b of the female type fastener are heat-welded to the back surface of the la so that they can be fitted together. Further, an opening 14 for opening the container is formed by cutting out a long and thin piece 17 in the upper film portion facing the mating area between the convex part of the male type fastener and the concave part of the female type fastener. A tab 15 is attached to the tip of the .7.

FIG. 3 shows the shape of the openings 1-4 of the upper film lla, and on the back side of the upper film lla there are auxiliary films 16a, 16 made of aluminum thin films covered with resin on both sides.
b, 16c are attached, and one end of the auxiliary film 16b partially overlaps the auxiliary film 16c. Also, auxiliary film 1-6a is auxiliary film ↓6b
and are attached to the opposite side of the auxiliary film 16a at a predetermined interval.

Next, a usage example of this zipper bag will be explained. When the user first takes out the contents from the zipper bag, pull the tip of the tab ↓5 in the direction of the arrow as shown in Figure 4 to open the opening 1 in the upper film of the bag-like container.
form 4. At this time, the auxiliary film 16b is pulled out and the upper film lla facing that part is pulled out.
The bag is peeled off and the cut-out piece 17 is shaped, and the bag has an opening 14.
is expressed. At this time, the auxiliary film 16a, soil 6C
remains on the upper film, and the portion of the auxiliary film 1-60 that overlapped with the auxiliary film ↑6b protrudes into the opening 14. By attaching the auxiliary film to the upper film in this way, the opening can be easily formed and the formed opening can be mechanically strengthened.

Next, as shown in FIG. 2. Release the fitting between b and the four parts 13b of the female fastener. Then, the contents can be taken out from the opening 14 through the gap between the convex part of the male type fastener and the recessed part of the female type fastener.

Furthermore, in order to seal the opened container as described above, the convex portion 12b of the male type fastener and the concave portion 13b of the female type fastener may be fitted together.

Next, a zipper bag manufacturing apparatus according to the present invention will be explained.

FIG. 6(a) shows a zipper bag manufacturing apparatus 30,
This zipper bag manufacturing device 30 includes a packaging material roll 31.
A wrapping material 32 such as a laminate film is wound around the wrapping roll 31-9. An opening forming portion 50 for forming the opening 14 (FIG. 1) of the zipper bag 10 is provided in advance at a predetermined position of this packaging material.

The packaging material 32 discharged from the packaging material roll 31 is conveyed to the fastener welding section 35 via a guide roller 34. The fastener welding part 35 has two heated rollers 36.4
One heating roller 36 is formed with two heating convex portions 36a, 36a spaced apart from each other by a predetermined distance.

This heating roller includes a packaging material 32 and a fitting roller 37.3.
The male type fastener 12 fitted by 7 and the female type fastener 1-3 are conveyed and sandwiched between the two heating rollers 36 and 36, whereby the combined fastener 38 and the packaging material 32 are thermally welded. Ru. At this time, the convex part of the male fastener and the concave part of the female fastener that are fitted are positioned in the heating section 39 formed by the two heating convex parts 36a, 36a, and #f.
It is configured such that a certain distance can be provided between the fitting part of the convex part of the type fastener and the four parts of the female type fastener, and the welded part. Therefore, the fitting portion of the fastener will not be heated, welded, or crushed (FIG. 6 (+)).

The package +3 with the zipper welded to it is cut into two pieces from the center by a cutter/IO, and the cut side 4 of the diagonal 11 transmission plate 41. 1, a 4-1. The sheets are separated and conveyed downward by the rollers 4, 2 and 42, and then stacked into two sheets by the combining rollers 43 and 43.

And bottom heating plate 4. 4. , 4 4, one end is heated and pressed, thereby being thermally welded to form the bottom of the bag-like container.

Next, side heating plates 45a, 4.5a, 4.5b4.
By heating and pressing both sides with 5 b,
Both sides are heat welded to form the side portions of the bag-like container.

At this time, in order to reduce the overlapping parts of the base parts of the male and female fasteners (see Figures 1 and 2), it is possible to partially heat them using supergonal waves, a heating plate, etc. By eliminating the need for crushing, it is possible not only to prevent the device from becoming complicated, but also to ensure side sealing without damaging the packaging material or causing printing or discoloration.

Finally, every time the shrine is transported at a predetermined interval, the
The molding of the bag-like container, which is cut at 6 and left open at one end, is completed.

In order to seal the contents into this zipper bag, the contents are filled from one open end, and then the open end is heat welded and chained.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to quickly and reliably provide a zipper bag with excellent sealing performance, and it is possible to quickly and reliably provide a zipper bag with excellent sealing properties, and to store foods that are sensitive to moisture, volatile chemicals, etc. that require sealed storage. This has the effect of making it possible to maintain the contents safely and reliably.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a zipper bag according to the present invention, FIG. 2 is a partial cross-sectional view of a zipper back according to the present invention, and FIG. 3 is a perspective view showing the state of the opening forming part on the back side of the upper film. 4 is a perspective view showing the zipper bag according to the present invention in an unsealed state, FIG. 5 is a cross-sectional view showing the state in which the contents are taken out from the zipper bag according to the present invention, and FIG. 6(a) is a A schematic perspective view showing the fastener bag manufacturing device according to the present invention, FIG. 6(b) is a sectional view showing the welded state of the fastener, and FIG. 7 is a conventional fastener bag manufacturing device.
FIG. 8 is a schematic perspective view showing a method of manufacturing a zipper bag, and FIG. 8 is a schematic cross-sectional view showing another method for manufacturing a conventional zipper bag. Co0 Zipper bag, 11a Upper film, 11
b. Lower film, 12. Male zipper ] 3.
・Female type fastener Co-7 cut piece, 32 ・Wrap, 4
0...Cutter 41--Reversing plate.

Claims (1)

[Scope of Claims] A zipper bag in which a bag-like container formed by overlapping one or two packaging materials and gluing their peripheries is sealed and opened by fitting and releasing a male-type zipper and a female-type zipper. In the above, the male type fastener and the female type fastener are attached to one of the packaging materials in a fitable manner, and a cutout part extending in the width direction of the bag is formed at the middle part of the welded part of both the zippers to the packaging material. Features a zipper bag. 2. Form a cutout of a predetermined length in the width direction of the sheet-like packaging material, and with the male and female fasteners fitted across this cutout, cut both ends of the combined fastener in the width direction. The packaging material is welded to a sheet-like packaging material and the male zipper and female zipper are attached, and the packaging material is divided into two from the center in the width direction, and one packaging material is attached with the male zipper and female zipper, and the other packaging material is welded. A method for manufacturing a zipper bag, comprising overlapping packaging materials to form a bag-like container.