JPH0872929A - Inflation-formed bag - Google Patents

Abstract

PURPOSE: To facilitate the unsealing of a bag even when the top and bottom sealing width are made narrow, for a bag made of a thin inflation film. CONSTITUTION: For an inflation-formed bag, the top and bottom parts of an inflation film 1 which is formed into a cylindrical shape are sealed 2, 2 to make a bagged product. For such an inflation-formed bag, a partitioning seal 3 of an appropriate shape is applied on a side end part which is adjacent to the sealed part 2 on one end side of the bag, and by the partitioning seal 3, a partitioned area 4 is formed on the side end part of the bag. Then, a separatable linear seal 5 for unsealing is applied on the side end edge (1a) of the bag in the partitioned area 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inflation-molded bag, and more particularly to an inflation-molded bag that facilitates incision during opening.

[0002]

2. Description of the Related Art For example, a plastic film bag for enclosing semi-fluid contents such as mayonnaise, various kinds of jams, liquid eggs, and miso to supply to the market. There is an inflation film formed into a tubular shape, in which the contents are sequentially filled in a fixed amount, the upper portion thereof is sealed, and cut at the sealing position to obtain individual bag-filled products.

The bag using the inflation film as described above is a thin product (thickness: about 20 to 120 .mu.m), and if the sealing portion is sealed with a normal width of 3 to 8 mm, "wrinkle" is generated after the sealing by heating. Since this causes the appearance of the product to be impaired, the inflation width of this type of thin inflation-molded bag has an extremely narrow seal width.
It is designed to be sealed by a line seal with a width of ~ 2 mm,
It is designed to minimize the occurrence of "wrinkles".

[0004]

However, in the case of the above-mentioned inflation-molded bag, there is no seal portion on the left and right side edges of the bag, unlike a normal plastic film bag whose four edges are sealed. It is impossible to make a cut, and there is no choice but to make it on the side edge within the range of the seal width of the seal part, but if the seal width is narrowed as described above, it becomes impossible to form a cut in this seal part. .
Also, if you try to tear the bag vertically by forming a cut in the end seal part outside the top or bottom seal part,
It is difficult to make a vertical tear due to the orientation of the inflation film. Therefore, at the time of opening the bag, there is no choice but to open the bag by cutting off one end side of the bag with scissors, which causes a problem that the opening operation becomes extremely troublesome.

Therefore, as a solution to the above-mentioned problems, the applicant of the present invention forms a partition region by applying a partition seal to one side end of the inflation bag, and provides an opening slit at the side end of the bag in this region. Inflation molding bag was developed. According to this bag, the slit portion is separated from the inside of the bag by the compartment seal, and when opened, the slit can be torn to separate it according to the orientation of the bag material, and the contents can be taken out. Even if it is narrow, it can be opened without any inconvenience.

[0006] However, if a slit is formed at one end of the bag in this manner, the portion separated by the slit will flicker and not only look bad, but it will also be caught on something and opened. There are difficulties.

In view of the above, the present invention not only allows the bag to be opened easily even if the upper and lower sealing widths of the bag made of a thin inflation film are extremely narrow, but it also looks good and is erroneously opened. It is an object of the present invention to provide an inflation-molded bag that is free from the risk of

[0008]

In order to achieve the above object, the present invention is an inflation-molded bag in which the upper and lower portions of an inflation film formed into a tubular shape are sealed to form a bag-filled product, and one end of the bag is sealed. The side end adjacent to the section is provided with a partition seal of an appropriate shape, and the partition seal forms a partition region at the side end of the bag, and a separable line for opening is formed on the side edge of the bag in the partition region. It is characterized in that it is provided with a seal.

[0009]

According to the above construction, the linear seal is kept closed before the bag is opened, and there is no cut. If the bag is torn from the linear seal formed on the side edge in the compartment area at the time of opening, the film in the compartment area is torn from the linear seal due to its orientation, and then cuts across the compartment seal. The contents can be poured out by tearing to the appropriate position on the side edge of the other side or by cutting off all.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings. FIG. 1 shows a front view of an embodiment of an inflation-molded bag 1 according to the present invention. The inflation film which is the material of the bag 1 has a thickness of polyethylene, nylon polyethylene, polypropylene or the like of 20 to 120.
A material having a size of about μ is used, and has a property that it can be torn in the width direction (lateral direction) of the bag 1 due to the orientation of inflation.

In the inflation-molded bag 1, the flat tubular inflation film that is continuously formed is cut into a predetermined length, and one end of the inflation-molded bag 1 is cut at a predetermined interval from its edge, as is commonly used. The end-sealed portion 1b is left sealed, a fixed amount of content is filled from the open end side, and then the end-sealed portion 1c at a constant interval from the upper edge is left sealed by a heat-sealing means to form a bag-filled product. Is formed. The seal width of the seal portions 2 and 2 is a line seal of about 1 to 2 mm.

A partition seal 3 is drawn at one end near the upper end of the inflation-molded bag 1 so as to draw a closed loop so that both ends reach the side edge 1a of the bag 1. A partition area 4 is formed between the side edge 1a of the bag 1 and the side edge 1a of the bag 1 into which the contents cannot enter. FIG. 2 is A- of FIG.
It is an A section.

The side edge 1a of the bag 1 within the defined area 4 is formed with a separable linear seal 5 for opening such as a linear seal or a perforated line.

The shape of the partitioned area 4 is shown in FIG.
As shown in (A) to (C), any design form other than a semicircle such as a trapezoid, a quadrangle, and a triangle can be selected.

FIG. 4 shows an example of a case where the partition seal 3 is performed at the same time as the packer seal for sealing the bag mouth portion. In this case, one end of the partition seal 3 is on the bag 1 side. The end edge 1a is shaped such that the other end reaches the mouth seal 2, and the opening line seal 5 is formed below the seal portion 2.

The partition area 4 is not limited to one side of the bag 1, but is symmetrically provided on both sides as shown in FIG. 5, and the linear seals corresponding to the side edges 1a, 1a of the partition areas 4, 4 are provided. 5,
5 may be provided.

If the partition areas 4 in the embodiment shown in FIGS. 3 to 5 are symmetrically provided on the left and right sides of the bag 1 as shown in FIG. 5, the mouth of the bag 1 has the left and right partition areas 4, 4. It becomes a structure that can be squeezed by the partition seals 3 and 3 of 4, and if it is cut from one linear seal 5 to the other side, it becomes the form of FIG. At the time of opening, the contents do not flow out all at once, but they flow out while being squeezed, which makes the bag easy to use. Even when the inside of the partitioned region 4 is formed on only one side, the function similar to the above can be provided.

Therefore, in order to open the inflation-molded bag 1 described above, if the bag 1 is torn from the linear seal 5 formed on the side edge 1a in the partitioned area 4, the linear seal 5 will be broken. The film in the compartment area 4 tears, then cuts across the compartment seal 3 and tears in the direction of the side edge 1a on the other side. At this time, cut to an appropriate position, or cut off all and open, and then pour out the contents. At the time of this pouring, since the mouth portion of the bag 1 is squeezed by the partition seal 3, it does not flow out all at once, but can easily flow out.

However, the method of adding the seal can be performed by a spot seal machine as shown in FIG. That is, the spot seal machine 10 includes a fixed seal portion 11 on the upper side and a movable seal portion 1 under the fixed seal portion 11 that moves up and down.
The film 1, which is a bag 1, is sealed when moving between the fixed seal portion 11 and the movable seal portion 12 of the fixed spot seal machine 10 as shown in FIG. It is supposed to be done.

Each of the seal portions 11 and 12 is made of metal and has a Teflon tape adhered on its surface.
It is heated to ℃. As shown in FIG. 7 (d), of the upper and lower central heat blade seals 13 and 14, the lower heat blade seal 14 has a thin tip of, for example, 0.5 mm, and its angle is about 15 ° and the height is about 15 mm. However, heat is not applied to this portion, and the film moves with heat of about 50 to 60 ° C. due to heat conduction from the surroundings by moving up and down between the fixed seal portion 11 and the movable seal 12 portion. The bag 1) is to be linearly sealed.

FIG. 8 shows a plan view of the processed linear seal 5, the width of which is about 3 mm, the inner side is by a hot blade seal and the outer side is by a contour. The seal can be molded at the same time.

Considering the suitability of the production line,
For example, when a notch (slit) such as a triangle is made, the bag-forming sheet is divided into upper and lower parts.
It causes a device member on the line to be caught, but in the case of the present invention, this is not present.

In addition, since the sealing is performed by adjusting the temperature and pressure of the blade of the hot blade seal and the inclination angle, it is possible to seal in a state where the blade is easily cut.

[0024]

As described above, according to the present invention, the side end of an inflation-molded bag made of an inflation film is provided with a suitably shaped partition seal at the side end adjacent to the seal on one end. To form a partitioned area,
Since a linear seal that can be cut and opened for opening is provided at the side end of the bag in this partitioned area, tools such as scissors can be used even if the seal part of the bag mouth is as narrow as possible. A bag that can be opened with one touch without using it,
As a result, it is possible to obtain a bag-shaped product which does not wrinkle in the seal portion and does not flicker, and which can be taken out easily without taking out all at once when the contents are taken out.

Particularly, at the time of molding, the opening line seal and the partition line seal can be molded all at once, and the position and the length of the opening line seal can be made constant with respect to the partition line seal. Further, since the linear seal portion does not flicker, it does not get caught on other objects, and therefore there is no fear of accidentally opening the seal.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of an inflation-molded bag according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

3A to 3C are front views showing another example of the shape of the partition seal in FIG.

FIG. 4 is a front view showing a shape example when a partition seal is molded at the same time as a packer seal.

FIG. 5 is a front view of the case where the divided areas are formed on the left and right portions of the bag.

6 is a front view showing an opened form of the bag of FIG.

FIG. 7 shows a spot sealing machine for applying a seal to an inflation-molded bag according to the present invention, (a) is a perspective view,
(B) is a front view, (c) is a side view of (b), (d) is a BB sectional view of (c).

8 is a plan view of a partition seal and an opening line seal (perforations) provided by the spot seal machine of FIG.

[Explanation of symbols]

 1 Inflation molding bag 1a Side edge 2 Seal part 3 Compartment seal 4 Compartment area 5 Linear seal for opening

Claims (2)

[Claims] 1. An inflation-molded bag in which the upper and lower portions of an inflation film formed into a tubular shape are sealed to form a bag-filled product, and a partition seal having an appropriate shape is provided at a side end portion adjacent to a seal portion on one end side of the bag. An inflation-molded bag, characterized in that a partition region is formed at the side end of the bag by applying the partition seal, and a separable linear seal for opening is applied to the side edge of the bag in the partition region. 2. The compartment seals are applied to both side ends of the bag to form compartment areas on the left and right sides, and severable linear seals for opening are formed at corresponding side edges of the compartment areas. 1
Inflation molding bag as described.