JPH1086948A - Easy-to-open wrapping material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wrapping material which can be extremely easily unsealed only by force of fingers when a pillow-packaged object is to be taken out in such a structure that packaging is possible utilizing an existing packaging machine. SOLUTION: In a pillow-type or gusset-type bag made of a film containing a laterally uniaxially stretching film at least in its constitution, an overlapped end is a non-adhesive part, a center seal 4 is a weak seal, two notches 2 are provided at an end of an overlapped film 3, and fine flaws are made over an entire end of an overlapped piece when needed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to easy opening of a pillow type packaging material.

[0002]

2. Description of the Related Art A user who purchases a product filled in a sealed bag is not limited to a case where the user can open the sealed bag using tools such as scissors, a kitchen knife, a knife, and the like. It is desired to be able to open the sealed bag without using these tools as much as possible. FIG. 8 shows various flat bags and notches provided in the bags. FIG. 9 is an explanatory view of a pillow type bag according to the prior art and the opening thereof. The simplest method of opening is opening by breaking a weak seal. For example, as shown in FIG. 9 (9-1), in the case of a large pillow-type bag generally used for packaging potato chips or the like, the sealing strength is relatively weak. )
As shown in the figure, the film on the front and back of the bag is grasped with fingers, and the seal of the upper seal portion (or lower seal) 27 is peeled and broken,
It is possible to form an opening K ₀ in the upper (or lower). Further, as a technique relating to the opening of the flexible package, for example, as shown in FIG. 8, the opening can be opened by providing a notch 22 at the end of the bag within a range that does not affect the sealing performance. Notch shape is I notch or V
In the case of a film with good tearability, it can be opened relatively easily by giving a trigger for tearing, and the method using this notch is simple but has been used as a general technique. Was. As the shape of the bag, as shown in FIG. 8, a two-sided seal (8-1), a three-sided seal (8-2), a four-sided seal (8-3), etc.
If the bag has a seal at the outer edge, a notch 22 may be provided at the end of each sealed side.
However, when packing a bulky product efficiently and tightly, it is often convenient to pack it in a pillow-type bag. 2. Description of the Related Art In the packaging of confectionery and food, there are cases in which rice crackers, stick-shaped chocolates, biscuits, and the like are packaged one by one or one by one in a pillow type. These contents may not be easily opened by a method of opening only by the notch for a user, such as an infant, who has no strength and does not have sufficient finger action. To open the pillow type bag, see FIG.
The notch 22 may be provided on the side of the upper and lower seals as shown in FIG. 5, but the contents are taken out from the opening [(9-4) K ₀ ] without opening the entire surface even if the notch 22 is torn. And it was necessary to widen the opening. In addition, when the notch is provided in the joint portion, particularly when the contents are tightly packed in the bag, even if the joint portion can be torn, it is difficult to further open because of the contents. Met. In the case of food that requires cleanliness, or in the case of chocolate or other content that melts and contaminates hands when it is held in the hand, it is desirable to use it without touching it directly. Such conventional packaging forms are inconvenient. Furthermore, tearing may be conducted using a tear tape or the like, but in this case, it is necessary to provide a device for attaching the tear tape to the packaging machine, and the packaging ability may be reduced. Was. Therefore, there has been a demand for a technique capable of extremely easily opening a pillow-type bag without incorporating a special device in a conventional packaging machine.

[0003]

When the pillow-packaged contents are taken out, the contents can be opened very easily with only fingers.
Provide a packaging material having a structure that can be packaged using an existing packaging machine.

[0004]

Means for Solving the Problems In a pillow type bag or a gusset pillow type bag made of a film including at least a uniaxially stretched film, the end of the joint portion is a non-adhesive portion and the center seal is weak. An easy-open packaging material comprising a seal and two notches provided at an end of the joint portion film.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pillow type packaging is not consumed at a time, and the contents remaining in the bag may be wasted due to deterioration such as moisture absorption and oxidation.
The number of cases used for individual packaging of confectionery and food has increased. Since the packaging is relatively tight, there is a problem that it is difficult to open with the conventional opening method. Therefore, the present invention relates to a method of opening a pillow type package, comprising a base film including a transversely uniaxially stretched film, providing two notches at an end of an upper piece of a joint portion, and bonding at least a center seal portion. Is a weak seal. The form of the bag of the easy-opening packaging material in the present invention is a pillow type as described above, but the method of the easy-opening of the present invention in pillow packaging will be described below with reference to the drawings.

FIG. 1 is a view for explaining the procedure up to the opening of the easily-openable packaging material of the present invention. (1-1) Before opening, (1-2) During opening, (1-3) After opening 2 is shown in FIG.
FIG. 3 is a cross-sectional view taken along line X-X of (1-1), and FIG. The film structure of the easily-openable packaging material of the present invention is a material containing a transverse uniaxially stretched film in its layer structure in order to impart tearing directionality.
That is, as shown in FIG. 1 (1-2), when the grip portion 10 in the double notch portion 2 is gripped with a finger, turned upside down, and pulled as it is, the torn film is surely torn in the lateral direction, and finally the film is torn. The pillow-type bag is cut up and down as shown in FIG. 1 (1-3). If the double notch 2 is provided in the vicinity of the center of the bag, as a result of opening in this manner, FIG.
As shown in 3), approximately half of the contents are exposed. In the present invention, it is an essential condition that the transverse uniaxially stretched film is present in the packaging material composition so as to impart easy tearing properties in the transverse direction, but in addition to the transverse uniaxially stretched film, a film exhibiting other properties is required. For example, even if a biaxially stretched film of polypropylene, polyester, polyamide, or the like is laminated, the tearing property in the lateral direction of the packaging material is not impaired. Further, providing a coating of resin or the like or a deposited layer of aluminum or silicon oxide for improving the moisture proof property and gas barrier property does not hinder the practice of the present invention.

[0007] In the present invention, a desirable weak seal is a method in which an easy-open resin is laminated on the entire back surface of the base film. The peeling resistance is too strong. In the future, if the easy-opening resin can be improved, for example, if easy-opening can be realized by blending a heat-seal inhibiting component, it can be used as the weak seal of the present invention. A more preferable method for making the center seal in the present invention a weak seal is:
3. Applying a solution type or emulsion type adhesive to the entire inner surface of the base film or to a portion 11 in consideration of a displacement at the time of sealing assuming a position to be sealed as a pillow type as shown in FIG. It is. In the case of partial application, as shown in FIG. 3, an adhesive application section 11 is provided on the back surface of one packaging unit of packaging material, but the application section is left, right, up, down, and slightly displaced during packaging. In order to be able to cope with the situation, the area should be large enough. If there is a problem due to the contact of the adhesive non-applied portion 12 at the center with the contents, a coating layer may be provided according to the purpose.

As a method of applying the adhesive partially, a gravure plate, a relief plate made of rubber or resin, or the like can be used. However, in the case of the entire surface application, in addition to the above-described method, the application may be performed by roll coating, air knife coating, or the like. The adhesive component of the coating type is an ethylene-vinyl acetate copolymer, an acrylic resin, nitrocellulose, chlorinated polypropylene, and an emulsion type or a solution type of these resins is used. It is also possible to use a cold sealant as a weak seal. The cold seal has a coating surface that is not tacky, but can be bonded by strongly pressing the coating surfaces together, and does not require heating at this time. As a main component of the cold sealant, synthetic rubber, natural rubber or acrylic resin is used. The adhesive is provided at a predetermined position in conjunction with the pattern on the surface of the base material, and in the packaging machine, the pitch of the pattern is detected to perform upper and lower seals. Seal in place. In the case of the partial coating method of the sealant, it is economical because there is no need to apply an adhesive to the non-adhesive portion 12.

[0009] The weak seal of the present invention is one that has easy-opening properties while maintaining a strength that does not impair the moisture-proof property and the fragrance retention property for preserving the contents. The peel strength as easy opening is 50 to 5 by adding the tear resistance of the base film.
00g / 15mm width, preferably 100-200g / 15mm
It is width. As described above, a weak seal is used for easy opening, so care must be taken when applying to heavy contents and the like.

The packaging with the easy-open packaging material P of the present invention can be carried out by using a general pillow type packaging machine.
The function of the packaging machine generally includes a former (molding) section, a center seal section and a filling section, and an upper, lower seal section and a cutting section. Is provided with two notches 2 by a notch processing device before the former portion or after the center seal.

The roll-shaped easy-opening packaging material is set in the packaging machine, the easy-opening packaging material is fed out, and the two notches 2 are attached to the ends which form the joints when a pillow-type bag is formed. To form a bag at the former. At this time, as shown in FIG. (2-2), a difference in width between the upper portion 3u of the palm portion and the lower portion 3d of the lower portion of the palm portion may be provided in the final pouch as shown in FIG. desirable. The difference is X ₁ -X ₂ , the purpose of which is to make it easier to pick the knob when opening. Then, the center seal width is sealed as the width S required for sealing inside the inside obtained by taking the width T required for picking from the upper end of the joint portion. In the present invention,
As shown in FIG. 2 (2-2), the end portion of the palm portion indicates a portion obtained by subtracting the center seal width from the width of the palm portion portion. In the case of the upper portion of the palm portion, x ₁ -S (T) In the case of the lower part of the joint, it is x ₂ −S. After doing center seal 4,
The upper and lower seals are performed at one time by a seal bar, and the continuous packaging material is cut at an intermediate point into individual easy-open packaging materials.

The shape of the notch 2 may be any shape such as an I notch or a V notch, as long as the initiation of the tearing is easy. As described above, the packaging material using the transverse uniaxially stretched film and the center seal are made to have a weak sealing property, and by providing two notches at the end of the joint piece, obtaining easy-openability in the pillow type. However, when the film is opened from the knob 10 and the tear band 6 is finally separated from the main films Pa and Pb, a slight tear resistance may be exhibited. In such a case,
It is desirable to apply an easy-opening process 14 with a fine scar at least over the entire end portion of the lower portion 3d of the palm portion, which makes opening easier.

The contents C are taken out from the easy-opening packaging material constructed as described above by picking the knob 10 provided on the joint portion 3 with a finger, turning it 180 degrees and pulling it. The base film is torn along the two notches 2 to form an unsealing band 6, which is finally separated into two parts Pa and Pb as shown in FIG. A portion K is formed. As a result, the content C is largely exposed, so that the content C is extremely easy to take out. Depending on the type of the product (for example, a stick-shaped or stick-shaped confectionery), the Pa portion is held in a hand, and the exposed content C is directly held in a mouth. can do. As described above, since the opening method is used, the contents are small, and when the package is tightly packed, etc., if the easily-openable packaging material of the present invention is used, even if the fingers such as an infant have no force. The packaging is very easy to open and easy to remove.

Although the pillow-type bag has been described as an easy-open packaging material, there is a gusset pillow-type bag as an improved type of the pillow type. FIG. 4 is a perspective view (4-1) showing a gusset pillow type bag and a sectional view (4-2) taken along the line VV. In a format used when the contents are in a bulkier shape, etc., in a molding section of a bag making machine or a packaging machine, the gusset G is folded on both sides in the flow direction of the packaging material only in a different packaging format. is there. Other center seal 4, upper seal 7, lower seal 8 and the like are the same as those of the pillow type. Therefore, the present invention can be implemented in a gusset pillow-type bag in the same manner as in the pillow-type bag described above.

[0015]

FIG. 5 is a developed view of the inner surface of the easy-opening packaging material of the present embodiment, FIG. 6 is the shape of the contents in the present embodiment and the comparative example, and FIG. 7 is wrapped by the easy-opening packaging material of the present embodiment. FIG. 8 is a perspective view showing a folded state, a cross-sectional view of an opening portion, and FIG. 8 is a perspective view showing a packaged state of a comparative example. The dimensions of each part were as follows. Contents: e ₁ = 12 mm, e ₂ = 8 mm, h = 60 mm Easy-open packaging material: L ₁ = 65 mm, L ₂ = 80 mm, r ₁ = 15 mm, r ₂ = 15 mm The base film used in the examples is polypropylene. Horizontal uniaxially stretched film, YT22 25μm (Toray Industries, Inc.)
A product name) and a film of aluminum-deposited PET 12μm laminated on a base film by dry laminating method, a pattern is provided on the front surface using a printing machine, and an adhesive layer is provided at a predetermined back position by registering the pattern with the pattern. Was. FIG. 7 (7-1-
As shown in 1), I notches 2 were provided at two places at the end of the upper piece of the palm joint. As a comparative example, a bag of the same size as that of the example made using a two-layer film of vapor-deposited PET 12 μm / low-density polyethylene 20 μm was used, and as shown in FIG. 7 (7-2-1), close to the upper seal of the joint part. An I-notch 2 'was provided at the site. The adhesive used in the examples was a dispersion of an ethylene-vinyl acetate copolymer, and the gravure plate depth used was 30 μm. The contents were chocolate-coated wafers in both the examples and comparative examples. In both the examples and the comparative examples, filling and sealing were performed by an existing horizontal pillow packaging machine. However, as for the notch,
The example was provided at two places and the comparative example was provided at one place. Each of the packages packaged as described above was opened orally opened to ten children aged 5 to 6 years after explaining the method of opening the same. All of them succeeded in opening the package immediately without any trouble. On the other hand, in the case of the comparative example, 4 out of 10 people destroyed the wafer of the contents, and the time required for opening the package also differed between individuals. Yes,
The slowest infant took about 15 seconds.

[0016]

According to the present invention, there is provided a pillow-type bag or a gusset pillow-type bag provided with a knob at a joint portion thereof and pulling the knob in the opposite direction to easily open a ring from a weak seal portion. It was possible to provide an easy-open packaging material that could be opened immediately by little children even with little trouble. In addition, if the easy-opening packaging material of the present invention, the weak seal portion is peeled off, and subsequently, by pulling the film in the lateral direction, the package can be opened in a ring shape, and finally, it goes around the opening band. When removed, the packaging material separates into two parts and the contents are greatly exposed, making it extremely easy to remove. Depending on the type of product (for example, stick-shaped or stick-shaped confectionery, etc.), the package that wraps the contents may be used. Holding the material in hand,
The exposed contents can be eaten as it is. Further, by partially applying the adhesive for weak sealing, the amount of the adhesive to be used is only required in the necessary parts, so that it is a material saving. Further, packaging with the easily-openable packaging material of the present invention can be performed only by providing a device for providing a double notch in a conventional packaging machine, so that no special equipment is required.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view for explaining a procedure up to the opening of an easily-opening packaging material of the present invention, wherein (1-1) before opening, (1-2) during opening,
(1-3) Shows the state after opening

FIG. 2 is a view showing a cross section of the easily-openable packaging material of the present invention, wherein (2-
1) Cross-sectional view taken along line XX of (1-1) in FIG. 1, (2-2)
2 (2-1) is an enlarged view of a Y portion, and (2-3) is an enlarged view of the Y portion, showing a state at the start of opening of the easy-open packaging material.

FIG. 3 is an exploded view from the inner surface of the easy-open packaging material.

FIG. 4 shows a gusset pillow type bag (4-1).
Perspective view, (4-2) sectional view of VV section

FIG. 5 is an inner surface development view of the easy-open packaging material according to the embodiment of the present invention.

FIG. 6 is a perspective view showing the shape of the contents in the embodiment of the present invention.

FIG. 7 is a perspective view of a state after packaging, (7-1) an example of the present invention, (7-2) a comparative example, and a cross-sectional view thereof.

FIG. 8 is a view showing various flat bags and a notch provided in each bag, (8-1) two-side seal, (8-2) three-way seal,
(8-3) A plan view showing an example of a four-sided seal

FIG. 9 shows (9-1) a pillow-type bag, (9-2) a cross-sectional view of the ZZ portion, and (9-3) an opening formed by peeling off the upper seal of the W portion. Diagram showing the state,
(9-4) A view showing formation of an opening by a notch provided on the upper side.

[Explanation of symbols]

P Easy-open packaging material C, C ₀ Contents K, K ₀ Opening S Center seal width T Non-seal width for picking the upper piece of the joint part 1,21 Base film 2,22 Notch 3,23 Joint part Piece 4, 24 center seal 5 joint side folded side 6 opening strip 7, 27 upper seal 8, 28 lower seal 9 sealant 10 knob 11 adhesive application section 12 adhesive non-application section 13 printing 14 easy opening due to fine scratches Processing 29 Seal part of flat pouch

Claims (3)

[Claims] 1. A pillow-type bag made of a film including a transverse uniaxially stretched film at least in its configuration, wherein a non-adhesive portion is formed at an end of a joint portion, a center seal portion is formed as a weak seal, and a joint portion is formed. An easy-open packaging material having two notches at one end. 2. The easy-open packaging material according to claim 1, wherein an easy-opening process with a fine scar is applied over the entire area of the end portion of the joint portion piece. 3. The easy-open packaging material according to claim 1, wherein the pillow-type bag is a gusset pillow-type bag.