JPH01153459A - Sealing bag - Google Patents

Abstract

PURPOSE:To unseal a bag without scattering the contents, by bending a laminated sheet with a base layer of multilayered member to make front and rear faces of the bag and by arranging many perforation lines on the sheet material at the bending part in the crossing direction against the bend line of the bend part. CONSTITUTION:A laminated sheet 12 of a base polyester film layer 14, for instance, covered by polyethylene film or the like 16 is folded backwards at two parts in the vertical direction and the end thereof are further folded outwards at the center of the rear face and the both upper and lower edges 22, 23 and the edge 24 of the rear face are sealed with heat respectively to form a bag 10. Perforation line 30 are arranged every certain vertical distance at both right and left bend parts 26, 26 of the base layer, extending at right angle against the bend parts 26. On taking out the contents of the sealed bag 10, when the laminated sheet 12 is vertically pulled to tear up at the required bend part 26, the laminated sheet bag 12 is broken along the scored line 30 and the broken line is extended to the direction crossing against the bend part 26. Accordingly, the contents can be easily taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sealed packaging bag that is sealed while containing an object to be packaged.

[Prior Art] The above-mentioned sealed packaging bag is mainly used for small portions of fluid, powder, or solid foods, medicines, etc., and the bag itself has high strength and gas barrier properties. Good things are required. For this reason, the material used for the bag is often a laminated sheet made of a synthetic resin film laminated with other synthetic resins, synthetic resin films, or metal foil.
Although these sheets have high strength, there is a problem in that the bag is difficult to tear when opened.

Therefore, a tear opening such as a notch is usually provided at the peripheral edge of the bag to make it easier to tear the bag.

However, if a tear opening is provided, the seal can only be opened from the point where the tear opening is provided, so recently, the
A sealed packaging bag as shown in Japanese Patent No. 39228 has been proposed. This packaging bag is a plastic subdivision/bag formed by fusion bonding on at least three sides, and has a large number of scars densely arranged on the edge line of the fused portion of the sheet constituting the bag. , the sheet portion that will become the edge portion is previously scratched or pressed using an abrasive material to provide scars.

[Problems to be Solved by the Invention] In the above-mentioned sealed packaging bag, there are many scars on the edge, so tearing can be started from any point, but the tearing starts when the packaging bag separates. The direction of the line cannot be controlled, and depending on the direction in which the scar is made, the packaging bag may be torn in an unexpected direction and the packaging bag may have to be torn again, making it inconvenient to open the packaging bag. Met.

In addition, in the above-mentioned sealed packaging bag, the scar is only on the fused part, that is, the seal part, so it is a so-called pillow-type sealed packaging bag that is fused vertically at the center of one side of the bag. In this case, it was inconvenient that it was not possible to start tearing from the edge of the bag.

Furthermore, if the above-mentioned sealed packaging bag is a three-sided sealed packaging bag with a take-out passage that stores a fluid such as a liquid,
Because it is the seal that you pinch with your fingertips to open the package,
There was a risk that the contents would scatter as soon as the break line reached the storage section, staining hands, etc.

In view of the above, the present invention makes it possible to control the break line, to start tearing from the edge even in a pillow-type packaging bag, and furthermore, to make it possible to control the tearing line even in a pillow-type packaging bag, and furthermore, it is possible to control the tearing line even in a pillow-type packaging bag, and furthermore, it is possible to control the tearing line even in a pillow-type packaging bag. To provide a hermetically sealed packaging bag that can be opened from the top and thus can be opened without scattering the contents.

[Means for Solving the Problems] The sealed packaging bag according to the present invention is produced by folding a laminated sheet whose base layer is a synthetic resin film or a multilayered body laminated with another synthetic resin. The bag body is constructed by sealing the peripheral edges of the front and back bodies except for the folded edges, and a perforated cut line is cut in the base material layer at at least one folded edge. A large number of them are arranged in a direction crossing the folding line of the edge.

[Function] In the sealed packaging bag according to the present invention, a large number of perforation-like cut lines are provided in the base material layer at the folded edge, so that tearing starts from any point on the folded edge. Moreover, since this cut line is arranged in a direction crossing the fold line of the folded edge, when tearing starts from the cut start end, the break line of the packaging bag progresses along the perforation.

This also applies to pillow-type sealed packaging bags.

In addition, in the packaged state until it is opened, the inside of the bag remains sealed by the other layers of the laminated sheet, despite the perforation-like cut lines provided in the base layer of the laminated sheet. has been done.

[Example] Hereinafter, a first example of the present invention will be described based on FIGS. 1 to 3.

Reference numeral 10 is a sealed packaging bag body according to the present invention,
A printed transparent polyester resin film is used as the base layer 14, and a polyethylene resin film 16 with good heat sealability is laminated on the printed surface of this base layer 14.
It is formed from a laminated sheet 12.

Is the laminated sheet 12 vertical? It is bent toward the back side at a certain point, and both ends of the back side are further bent outward at the center of the back side. The folded laminated sheet 12 is heat-sealed at the upper and lower edges 22, 23 and at the longitudinally extending edge 24 on the back side, respectively.
A so-called pillow-shaped bag body 10 is formed, and
Inside this bag body 10, there are edges 22, 23.2.
The items to be packaged are stored before 4 is heat-sealed.

On the left and right bent edges 2B, 2B of the base material layer 14, perforated cut lines 30 are provided at approximately equal intervals in the vertical direction along the bent edges 2B, and these cut lines 30
extends perpendicularly to the bent edge 2B.

The width a1 of the perforation line 32 of the cut line 30, the interval 1, the pitch in the vertical direction, and the length of the cut line 30 are not particularly limited, but the width a of the perforation line 32 is 0.6 to 2.0 nun,
Particularly preferably, the interval between the perforations 32 is 0.6 to 2.0 mm, the vertical pitch of the perforations 32 is 1 to 3 mm, and the length of the score line 30 is 5 to 10+ nm. If the width a of the perforation 32 is made smaller than the above dimension, the bag 10 will be difficult to tear, if it is made larger, the strength of the bag 10 will be weakened, and if the width a of the perforation 32 is made smaller than the above dimension, the strength of the bag 10 will be reduced. If it becomes weaker and larger, when the laminated sheet +2 is folded, the left and right folded edges 26 of the bag body 10 will continue to have portions without perforations 32, making the folded edges 26 difficult to tear.

Moreover, if the length of the cut line 30 is made larger than the above-mentioned dimension, the strength of the bag body 10 will be weakened, and if it is made smaller, when an error occurs when providing the perforation line 32 or when folding the laminated sheet 12, The perforations 32 are no longer located at the folded edge 26 of the bag body 10, making it difficult to tear the folded edge 26. For these reasons, it is preferable to set the above-mentioned dimensions so that the bag 10 can be opened when it is torn with an appropriate amount of force, and the bag 10 can have sufficient strength as a sealed packaging bag.

Furthermore, a perforation-like cut line 34 similar to that described above is also formed on a portion 28 adjacent to the end edge 24 on the back surface of the bag lO.
is provided. This adjacent portion 28 has a score line 3.
Although it is not necessary to provide 4, if you do it this way,
This is convenient because it is possible to control the direction of progress of the fracture line that has advanced to the center.

To open the sealed packaging bag 10 and take out the packaged item,
The folded edge 26 of the bag 12 is pulled at the top and bottom of the point to be torn. In this way, bag body 1
2 is broken along the perforated cut line 30, and this break line advances in a direction perpendicular to the bent edge 2G, so
Packaged items can be easily taken out.

Hereinafter, a method for manufacturing the above-mentioned sealed packaging bag will be explained.

A printing machine (not shown) that marks 11 on the surface of a polyester resin film has a predetermined position in a direction perpendicular to the running direction of the film, that is, a perforated cut line when forming a bag lO. A rotary blade 40 as shown in FIG. 3 is attached at a position corresponding to the location where the blades 30 and 34 should be provided. In addition, this rotary blade 40
A predetermined number of blades 42 for forming perforations 32 are arranged in the axial direction on the circumferential surface so as to correspond to the width a of the perforations 32 and the spacing therebetween.

After performing predetermined printing on the polyester resin film that will become the base layer 14 using a printing machine (not shown), the rotary blade 4
0 to provide perforated cut lines 30 and 34. In this embodiment, the perforation-like score lines 30.34 are provided by a printing machine, but it goes without saying that the score lines 30.34 may be provided by another device other than the printing machine after printing is completed.

Next, a polyethylene resin film 16 is laminated on the printed surface of the base material layer 14 by an extrusion lamination method or a dry lamination method to create a laminate sheet I2.

After that, after bending the polyethylene resin film 16 so that it is inside, the upper and lower edges 22 and 23 and the back edge 24 are heat-sealed with the packaged item stored between the front and back laminated sheets 12. .

Note that the shape of the bag 10 is naturally not limited to that shown in FIG. 1, and as shown in FIG. Part 26
may be made into a W-shape.

A second embodiment of the present invention will be described below with reference to FIGS. 5 to 7.

The laminated sheet 12 is folded in half at one point in the longitudinal direction, and is heat-sealed on three sides other than the folded edge 2B to form a so-called three-sided sealed bag lO. There is.

Further, a wide seal portion 54 is formed on the upper edge portion 22 of the bag body IO by heat sealing, leaving a narrow take-out passage 52 continuous with the storage portion 50.

The bent edge 26 of the bag lO is provided with a perforated cut line 30 similar to the first embodiment, and the wide seal portion 54 is also provided with several perforated cut lines 46. is provided parallel to the upper edge 22. This cut line 46
are provided so as to penetrate through the bag body 10, and intact portions 48 and 49 without perforations are formed on both left and right sides of the wide seal portion 54. The intact part 48 on the side of the takeout passage 52 prevents the packaged items stored in the takeout passage 52 from leaking to the outside through the perforation, and the intact part 49 on the opposite side to the takeout passage 52 prevents the packaged items stored in the takeout passage 52 from leaking to the outside. This prevents the wide seal portion 54 from breaking even when an unexpected force is applied during transport work. For this reason, the intact part 48.
The width of 49 is preferably about 3 to 5 mm.

The sealed packaging bag of this embodiment is mainly used for storing fluids, and in order to open the bag, the bag 10 is twisted and torn with the bent edge 2B in the take-out passage 52 as the cutting starting point. In this way, as shown in FIG.
4 and along either score line 46 to the opposite folded edge 26. In this way, the wide seal portion 54
By providing the cut line 46 in the package, it is possible to prevent the break line 5B from advancing toward the storage section and causing the packaged item to leak. In order to ensure that the break line 56 after separating the take-out passage 52 reaches the score line 46, it is preferable to provide 2.3 score lines 46.

Further, when the folded edge 26 is pinched with fingers during the tearing operation for opening the package, the fingers inevitably close the take-out passage 52, and there is no risk of the fluid scattering. For these reasons, the width of the take-out passage 52 is preferably about 7 to 10 mm.

The effects of this second embodiment will be explained below.

When this sealed packaging bag is used as a packaging bag for liquid soup, oleophobic oil, seasoning oil, etc. attached to instant noodles, etc., the bag body 10 may be of various sizes depending on the type and amount of contents. However, in the so-called pitch method, in which the cutting position of the laminated sheet 12 is determined in advance by printing, the types and quantities of packaging materials that must be prepared are too large. Therefore, in packaging bags for storing such contents, a so-called endless method is adopted in which the cutting position of the laminated sheet 12 is not determined at the printing stage.

When the sealed packaging bag according to this embodiment is used in the case of the endless method, the perforation-like cut line 30 is inserted into the take-out passage 5.
Since it is always present at the bent edge 2B of No. 2, the package can be opened easily and reliably, and the contents can be taken out from the opened takeout passage 52.

Note that the score line 4B in the second embodiment was parallel to the upper edge 22, but as shown in FIG. It is also possible to provide two or three of them.

In this way, the breaking line 5B can reliably reach the upper edge 22 as shown in FIG.

The third embodiment will be described below with reference to FIGS. 10 and 11.

The bag 10 in this embodiment is of a three-sided seal type like the second embodiment, but unlike the second embodiment, it is a parallelogram in which the upper and lower edges 22, 23 and the bent edge 2B are not perpendicular to each other. It is. In this case as well, the perforated cut line 30 is provided in a direction perpendicular to the bent edge 26.

When the upper part of the folded edge 26 is torn in order to open the bag lO, the break line 52 travels perpendicularly to the folded edge 2B and reaches the upper edge 22, so that, in particular, the second The take-out port 58 is formed without providing the take-out passage 52 as in the embodiment.

In addition, in each of the above embodiments, the perforated cut lines 30, 34, and 46 were perpendicular to the bent edge 26, but it goes without saying that these angles do not have to be 90 degrees. be.

In the first to third embodiments, the laminated sheet 12 was formed by laminating a polyethylene resin film onto a polyester resin film, which is the base layer 14 provided with the score lines 30 (■PET/■printing). /■PE), the laminated sheet 12 is not limited to this, and may be as described below. Note that in the above and below, symbols are also written in parentheses for ease of understanding. In this case, PET is a polyester resin film,
PE stands for polyethylene resin film or polyethylene resin, PVDC stands for polyvinylidene chloride resin, AI stands for aluminum, F stands for directional film, ■, ■, ■.

. . . represents the order of the steps, and the underline represents the base material layer on which perforation-like incision lines are provided.

After lamination, the above laminated sheet 12 is provided with a gas barrier on the polyethylene resin film side of the multilayer film.
It may be coated with polyvinylidene chloride resin with good properties (■PET/■Printing/■PE/■PVDC),
In addition, polyvinylidene chloride resin may be coated on the unprinted surface of the polyester resin film in the multilayer film (■PVDC/■PET/■Printing/
■PE). In the latter case, after the perforations 32 of the score line 30 of the polyester resin film are covered with the polyethylene resin film, which is the sealing resin, the vinylidene chloride resin is coated, and the perforations 34 are also coated with vinylidene chloride resin. Resin coating can be applied reliably. In the latter case, since the perforations 32 of the polyester resin film are closed by the polyethylene resin film and vinylidene chloride resin, sufficient gas barrier properties can be ensured, and the contents can be well protected during the distribution stage. .

Further, after printing is completed, a polyester resin film provided with score lines 30 is used as the base layer 14, a polyethylene resin film is laminated on the printed surface of this base layer 14, and then an aluminum foil is attached to this polyethylene resin film. It is also possible to laminate a polyethylene resin film between the two.■PET/■Printing/■PE/■Al/■P
E) Furthermore, aluminum foil is laminated on the multilayer film laminated with a polyethylene resin film by an extrusion lamination method, a directional film is laminated thereon by a dry lamination method or an extrusion lamination method, and a polyethylene A resin film may be laminated (■PET/■Printing/■PE/■Al/■F/■
PE).

Further, after printing is completed, a polyester resin film on which aluminum is vapor-deposited is laminated on the printed surface of the polyester resin film to form the base layer 14, and then,
A score line 30 may be provided in this base material layer 14, and then a polyethylene resin film may be laminated on the base material layer 14, and further, a polyvinylidene chloride resin may be applied to either side of this laminated multilayer film. (■PET/■Printing/E).

Furthermore, other synthetic resin films may be used in place of the polyester resin film, and other heat-sealable resin films or heat-sealable resins may be used in place of the polyethylene resin film.

[Effects of the Invention] In the sealed packaging bag according to the present invention, a large number of perforation-like score lines are arranged in a direction crossing the folding line of the folded edge, so that tearing can be started from any arbitrary point. At the same time, the break line of the packaging bag progresses along the perforations. Therefore, since the direction of the break line can be controlled in advance, the packaging bag can be opened easily and reliably, which is convenient.

In addition, in this sealed packaging bag, even a so-called pillow-type packaging bag is provided with a score line at the edge, which is convenient because it can be torn from the edge.

Furthermore, even in the case of a three-sided sealed packaging bag with a take-out passage, the bag can be opened while holding the take-out passage with your fingers, so the bag can be opened without causing the contents to scatter.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a sealed packaging bag according to a first embodiment of the present invention, FIG. 2 is an enlarged sectional view of the sealed packaging bag shown in FIG. 1, and FIG. 3 is a perspective view of a rotary blade. , FIG. 4 is a partially omitted perspective view of a sealed packaging bag that is a modification of the first embodiment of the present invention, and FIGS. 5 and 6 are sealed packaging bags according to a second embodiment of the present invention. FIG. 5 is a perspective view of the bag, and FIG. 5 shows the sealed state;
The figures each show an unsealed state, FIG. 7 is a partially omitted front view showing a torn state of the sealed packaging bag according to the second embodiment, and FIGS. 8 and 9 show the second embodiment of the present invention. 8 is a front view of a sealed packaging bag which is a modification of the embodiment, FIG. 8 shows a sealed state, FIG. 9 shows an unsealed state, and FIGS. 10 and 11 show a third embodiment of the present invention. FIG. 10 is a front view of a sealed packaging bag which is a modified example, and FIG. 10 shows the sealed state, and FIG. 11 shows the opened state. Explanation of symbols 10...Bag body 12...Laminated sheet 14...Base material layer 22...Upper edge 23...Lower edge Part 26...Folded edge 30.34.46...Score line Patent applicant Okada Shiko Co., Ltd. Agent Patent attorney Tsuta 1) Sho
Child 1 par □. 2 other people □ - Mouth expression (no change in content) Figure 3 Figure 4 Figure 8 Figure 9 Director General of the Patent Office Kunio Ogawa 1, Indication of the case Patent Application No. 301217 No. 301217 of 1985 , Name of the invention Sealed packaging bag 3, Relationship with the case of the person making the amendment Patent applicant: 2-5-25 Minamikai, Nishinari-ku, Osaka City Representative: Okada Shiko Co., Ltd. 1) Kyo San 5, Date of amendment order: Showa year Date Spontaneous 6, drawing subject to correction. 7. Contents of the amendment As shown in the attached sheet, an engraving of the drawing originally attached to the application (with no changes in content) must be submitted. / ,

Claims (1)

[Claims] 1. A laminated sheet whose base layer is a synthetic resin film or a multilayer body laminated with another synthetic resin is bent to form a front and back body, and the peripheral edge of this front and back body excluding the bent edge is The bag is sealed to form a bag body, and a number of perforation-like cut lines are arranged in the base material layer at at least one bent edge in a direction crossing the folding line of the bent edge. Features a sealed packaging bag.