JP2008110794A - Packaging bag with unsealable property - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible packaging bag whose tearing starting part can be specified even by a visually-handicapped person, which can be easily opened and has good unsealing properties. <P>SOLUTION: A straight line-like notch line 5 to be a tearing starting part is marked in parallel to an opening scheduled line on the outside end edge of a peripheral edge seal part 3 on the opening scheduled line 4 of the packaging bag 1, and a tearing inducing part 6 for recognizing the tearing starting part is attached on the opening scheduled line in the peripheral edge seal part inside of the straight line-like notch line. The tearing inducing part 6 consists of a set of a plurality of broken lines or the like indented in parallel to the opening scheduled line. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a packaging bag for packaging liquids, solids, powders, granules and the like, and in particular, easy to tear and open easily with bare hands in consideration for elderly people, visually impaired people and elderly people. The present invention relates to a packaging bag having openability.

  Conventionally, in order to make it easier to start tearing the packaging bag along the planned opening line, for example, as shown in FIG. 3, the edge of the planned opening line (14) of the peripheral seal portion (13) of the packaging bag (11) Are generally provided with notches (15) such as straight cut lines (I notches) and V-shaped notches (V notches).

  However, the tear-opening property varies depending on the shape of the notch, and the notch shape in which a straight line is cut can be torn and opened relatively easily. However, there is a drawback that the sealability is impaired due to tearing during distribution and transportation.

Various methods for solving these problems have been studied, and many inventions have been disclosed (see, for example, Patent Document 1 and Patent Document 2).
JP-A-6-8947. JP-A-6-8966.

  However, in both the first invention and the second invention, there are problems that the tear site cannot be limited to a specific location, that the visually impaired person cannot easily understand the tear start portion, and that a facility or process for providing a scar is necessary. there were.

  The present invention has been made in view of the above-described problems related to the means for opening a packaging bag. The tear site can be limited to a specific location, and a visually impaired person can identify the tear start location and can be easily opened. And it makes it a subject to provide the flexible packaging bag which has favorable openability.

  The invention of claim 1 of the present invention is a packaging bag in which a peripheral seal portion is provided by thermal welding on the peripheral edges of two opposing front and back rectangular main body films, the peripheral seal portion on the planned opening line of the packaging bag. A straight cut line that is a tear start portion is provided in parallel with the planned opening line on the outer edge, and the tear start portion is recognized on the planned opening line in the peripheral seal portion inside the straight cut line. It is a packaging bag having easy-opening characteristics, characterized by being provided with a tear guiding portion.

  Thus, according to the invention described in claim 1, the outer edge of the peripheral seal portion on the planned opening line of the packaging bag is provided with a linear cut line that becomes a tear start portion in parallel with the planned opening line, A tear guide for recognizing the tear start portion is provided on the planned opening line in the peripheral seal portion on the inner side of the straight cut line, so even a visually handicapped person can recognize the tear start portion by tactile sensation. Thus, a straight cut line can be found, and tearing can be easily started from the straight cut line.

  The invention of claim 2 is characterized in that, in the invention of claim 1, the tear guiding portion is composed of an assembly of a plurality of broken lines engraved in parallel with the planned opening line around the planned opening line. It is a packaging bag having easy-openability.

  Thus, according to the invention of claim 2, since the tear guiding portion is composed of a plurality of broken lines that are engraved in parallel with the planned opening line with the planned opening line as the center, if tearing is started, the packaging bag Can be torn in a straight line from the tear inducing portion through the tear initiation portion without being swayed from side to side along the planned opening line.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the tear guiding portion is formed by engraving a plurality of broken lines engraved in parallel with the planned opening line around the planned opening line, and above and below the broken line. It is a packaging bag having easy-opening characteristics, characterized in that it consists of an assembly of a plurality of broken lines inclined in a direction toward the parallel broken lines.

Thus, according to the invention of claim 3, the tear guiding portion is directed to a plurality of broken lines engraved in parallel with the planned opening line around the planned opening line and parallel broken lines formed above and below the broken open line. Since it consists of an assembly with a plurality of broken lines inclined in the direction,
If tearing is started, the packaging bag can be easily torn in a straight line from the tearing guide part through the tearing start part without swaying from side to side along the planned opening line.

  According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, the tear guide portion is a hole that penetrates the peripheral seal portion, and a tip in the tear direction has an acute angle toward the inside. It is the packaging bag which has the easy-open property characterized by being.

  Thus, according to the invention of claim 4, the tear guide portion is a hole that penetrates the peripheral seal portion, and the tip in the tear direction forms an acute angle toward the inside, so if tearing is started The packaging bag can be easily torn linearly from the tear inducing portion through the tear initiation portion without being swayed from side to side along the planned opening line.

  Further, the invention of claim 5 is the invention of claim 1, 2, 3 or 4, wherein the inner end of the portion where the straight cut line and the tear guide portion of the peripheral seal portion are formed is inward. It is a packaging bag having easy-opening characteristics characterized by being bent and formed wide.

  Thus, according to the invention of claim 5, the portion where the linear cut line and the tear guide portion of the peripheral seal portion are formed is formed to be wide with the inner end bent inward, Both the straight cut line and the tear guiding part can be formed without difficulty in the peripheral seal part, and the tear starting part that is a straight cut line can be easily recognized.

  As described above, the packaging bag having the easy-opening property of the present invention has a small (light) tear-opening force at the start of tearing, and can perform an opening operation with imparting directionality and giving a boost at the tearing guide portion. It can be easily opened with bare hands and can be widely used because it can maintain its sealing property. In addition, the tear guiding portion serves as a mark of the opening location and can be easily identified by a visually impaired person.

The present invention will be described in detail below based on one embodiment.
For example, as shown in FIG. 1, the packaging bag (1) having the easy-opening property of the present invention has a peripheral seal part (3) formed by heat welding on the peripheral edges of two opposing main body films (2) having a rectangular shape. It is a provided packaging bag. Of course, one side is open as an open side (7).

And, on the outer edge of the peripheral seal portion (3) on the planned opening line (4) provided inside the opening side (7) of the packaging bag, a tear start portion parallel to the planned opening line (4) And a tear guide (6) for recognizing the tear start portion is provided on the planned opening line in the peripheral seal portion inward of the linear cut line (5). It is characterized by being.
The straight cut line (5) and the tear guide part (6) serving as the tear starting part may be provided only on one outer edge of the peripheral seal part (3) on the planned opening line (4), as shown in the figure. As such, it may be provided at two locations on the outer edge of the other peripheral seal portion on the planned opening line.

  The tear guiding portion (6) is formed of an assembly of a plurality of broken lines (a) engraved in parallel with the planned opening line with the planned opening line (4) as the center (see FIG. 2 (a)).

  The tear guiding portion (6) has a plurality of broken lines (a) engraved in parallel with the planned opening line around the planned opening line (4) and a direction toward the parallel broken lines formed above and below the broken line. It is formed from an aggregate of a plurality of broken lines (b) inclined to (see FIG. 2 (b)).

  Furthermore, the tear guide portion (6) may be a hole (c) that penetrates the peripheral seal portion whose tip in the opening direction forms an acute angle toward the inside. Specifically, diamonds, triangles, and the like can be considered (see FIG. 2C).

  In addition, the portion of the peripheral seal portion (3) where the straight cut line (5) and the tear guide portion (6) are formed is torn apart if the inner end is bent inward and formed wide. The straight cut line (5) and the tear guide part (6) as the start part can be disposed with a margin, and even if the straight cut line (5) is torn, the tear guide part (6) Can stop the tearing.

  The main body film (2) used for the packaging bag is not particularly limited, and appropriate materials should be selected and used depending on the use conditions such as the type of contents to be packaged and the presence or absence of heat treatment after filling. Can do. A composite film mainly composed of a plastic film is used for an ordinary packaging bag.

For example, stretched polyethylene terephthalate film / aluminum foil / unstretched polypropylene film, stretched polyethylene terephthalate film / stretched nylon film / aluminum foil / unstretched polypropylene film, stretched polyethylene terephthalate on which a deposited thin film layer of aluminum oxide is formed. A composite film having a layer structure such as film / stretched nylon film / unstretched polypropylene film can be preferably used.
It is more preferable to use a stretched polyethylene terephthalate film or a stretched nylon film imparted with a linear cut property.

  Usually, the contents are filled from the opening side (7) of the packaging bag, and then the outer edge is sealed from the planned opening line not including the planned opening line (4) of the opening side as a filling seal portion (8).

  Next, the present invention will be described in more detail with reference to examples.

  First, a stretched polyethylene terephthalate (PET) film having a thickness of 12 μm, an aluminum foil (Al) having a thickness of 7 μm, and an unstretched polypropylene (CPP) film having a thickness of 70 μm are prepared. The first composite film having a layer structure of PET12 / Al7 / CPP70 was prepared by using a polyurethane-based adhesive.

  A three-side sealed bag having an outer dimension of 165 mm in length and 135 mm in width was produced from the first composite film with the CPP film surface inside. The normal peripheral seal width is 8 mm, and the peripheral seal width on the planned opening line and in the vicinity of the planned open line is 16 mm.

  A straight cut line with a length of 3 mm to be the tearing start part is put in parallel with the planned opening line on the outer edge of the peripheral seal part on the planned opening line of this three-side seal bag, and the opening is scheduled on the inner planned opening line. A tearing guide portion having a size of 4 mm in length and 5 mm in width, which is made up of a large number of broken lines engraved in parallel with the planned opening line centering on the line, is formed 4 mm away from the straight cut line. A packaging bag having easy-openability. In addition, the tear start part and the tear guide part were formed symmetrically at two peripheral seal parts on the left and right sides of the packaging bag.

  In addition to the film prepared in Example 1, a stretched nylon (ONY) film having a thickness of 15 μm was prepared, and a second layer composed of PET12 / ONY15 / Al7 / CPP70 with the same material and method as in Example 1 was used. A composite film was prepared.

  From this second composite film, a three-sided seal bag having the same dimensions as in Example 1 is made with the CPP film side facing in the same manner as in Example 1, and the same tear initiation part and tear induction part as in Example 1 are provided. It was set as the packaging bag which has the easy-open property of Example 2. In addition, the tear start part and the tear guide part were formed symmetrically in two places on the left and right peripheral seal parts of the packaging bag as in Example 1.

  In addition to the CPP film having a thickness of 70 μm prepared in Example 1 and the ONY film having a thickness of 15 μm prepared in Example 2, a stretched polyethylene terephthalate (GL) film having a thickness of 12 μm on which a deposited thin film layer of aluminum oxide was formed. A third composite film having a layer configuration of GL12 / ONY15 / CPP70 was produced by the same method as in Example 1.

  From this third composite film, a three-sided seal bag having the same dimensions as in Example 1 is made with the CPP film surface facing in the same manner as in Example 1, and the same tear initiation part and tear induction part as in Example 1 are provided. The packaging bag having easy-openability of Example 3 was obtained. In addition, the tear start part and the tear guide part were formed symmetrically in two places on the left and right peripheral seal parts of the packaging bag as in Example 1.

Hereinafter, Examples 4 to 6 are comparative examples of Examples 1 to 3.
Using the three-sided seal bag created in Example 1, the easy-opening property of Example 4 is the same as Example 1 except that the tear start portion is changed from a straight cut line to a turtle-like cut line. A packaging bag having In addition, the tear start part and the tear guide part were formed symmetrically in two places on the left and right peripheral seal parts of the packaging bag as in Example 1.

  Using the three-sided seal bag created in Example 2, the easy-opening property of Example 5 is the same as Example 1 except that the tear start portion is changed from a straight cut line to a turtle-like cut line. A packaging bag having In addition, the tear start part and the tear guide part were formed symmetrically in two places on the left and right peripheral seal parts of the packaging bag as in Example 1.

Using the three-sided seal bag created in Example 3, the tear opening part of Example 6 was easily opened in the same manner as in Example 1 except that the tearing start portion was changed from a straight cut line to a turtle-like cut line. A packaging bag having In addition, the tear start part and the tear guide part were formed symmetrically at the two peripheral seal parts on the left and right sides of the packaging bag in the same manner as in Example 1.

  The opening force of the tearing start part of the packaging bags having three types of examples and three types of comparative examples thus prepared and having six types of easy opening properties was measured by the method of JIS S0022. The results are shown in Table 1.

このように引き裂き開始部の形状は直線形状が有効であることがわかる。なお引き裂き誘導部が形成されていないと直線状にならず、引き裂き方向がばらついてしまう。
なお、実施例１から実施例３の包装袋に１８０ミリリットルの水を充填後、包装袋を引き裂き開始部が垂直上下方向になるようにして梱包し、１．２メートルの高さから３回落下させたが、引き裂き開始部からの引き裂きは引き裂き誘導部で留まり密封性を保っていた。

Thus, it can be seen that a linear shape is effective for the shape of the tear start portion. If the tear guiding portion is not formed, the shape is not linear and the tearing direction varies.
In addition, after filling 180 ml of water into the packaging bags of Example 1 to Example 3, the packaging bag was packed so that the tearing start portion was vertically up and down, and dropped three times from a height of 1.2 meters. However, the tear from the tear starting portion stayed at the tear guiding portion, and the sealing property was maintained.

It is a plane explanatory view showing one example of the packaging bag which has easy openability of the present invention. (A)-(c) is a plane explanatory drawing which shows one Example of the shape of the opening induction | guidance | derivation part formed in the easily openable packaging bag of this invention. It is plane explanatory drawing which shows an example of the conventional easily openable packaging bag.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Packaging bag with easy opening 2 Main body film 3 Peripheral seal part 4 Opening scheduled line 5 Linear cut line 6 Opening guiding part 7 Open side 8 Filling Seal part 11 ... Packaging bag 13 ... Peripheral seal part 14 ... Opening scheduled line 15 ... Notch a ... Broken line engraved parallel to the planned opening line b ... Broken line inclined in the direction toward the parallel broken line c ... A hole with a sharp tip inward in the tear direction

Claims (5)

In a packaging bag in which a peripheral seal portion is provided by thermal welding on the peripheral edges of two opposing main body films of a rectangular shape,
The outer edge of the peripheral seal portion on the planned opening line of the packaging bag is provided with a linear cut line that becomes a tearing start portion parallel to the planned opening line, and in the peripheral seal portion on the inner side of the linear cut line. A packaging bag having easy opening characteristics, characterized in that a tear guiding part for recognizing a tear starting part is provided on a planned opening line.   The packaging bag having easy-openability according to claim 1, wherein the tear guide portion is composed of an assembly of a plurality of broken lines engraved in parallel with the planned opening line around the planned opening line.   The tear guide portion is an assembly of a plurality of broken lines engraved in parallel with the planned opening line around the planned opening line and a plurality of broken lines inclined in the direction toward the parallel broken lines engraved above and below the broken opening line. The packaging bag having easy-openability according to claim 1 or 2, wherein the packaging bag has the following characteristics.   The easy-opening property according to claim 1, 2 or 3, wherein the tear guide portion is a hole penetrating the peripheral seal portion, and a tip in a tear direction has an acute shape inward. Having packaging bag.   The portion of the peripheral seal portion where the linear cut line and the tear guide portion are formed is formed to be wide with the inner end bent inward. 4. A packaging bag having easy-openability according to 4.

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