JP4993082B2 - Easy-open packaging bag - Google Patents

Description

  The present invention relates to an easy-open packaging bag in which a straight opening schedule line is formed, and more particularly to a pillow type easy-open packaging bag that can be easily opened by tearing from the opening schedule line.

  Conventionally, pillow-type bags that can be opened by tearing in the direction perpendicular to the palm heat-bonding part include aluminum foil and heat-seal resin on the bottom surface of packaging substrates such as perforated or notched synthetic resin films and paper A cylindrical bag is known which is made into a pillow type bag using a packaging sheet material laminated with (see, for example, Patent Document 1). Further, it is a long packaging material in which at least a base material layer and an inner layer made of a heat-adhesive resin are laminated, and linear cuts having a certain length are arranged in a straight line at regular intervals on the base material layer. A packaging material has been proposed in which a planned opening line is formed and a tear line can be reliably bridged between the cuts (for example, see Patent Document 2).

Both of these inventions can be reliably opened by tearing along the planned opening line formed by perforations or cuts, but tearing along the planned opening line from the crease at the side edge of the pillow type bag. However, there is a problem in that it is difficult to tear the unsealed portion when it is opened and reaches the jointed heat-bonded portion. This is because when the unsealing progresses and reaches the joint heat bonding part, until now, the folded front and back surfaces of the packaging material constituting the pillow type bag, that is, the tearing of the two packaging materials has been torn. This is because two of the parts constituting the sheet have been added, and substantially four packaging materials have to be torn, especially when the alignment position of the planned opening line is deviated at the jointed heat-bonding part, it takes a further gap in opening. There's a problem.
Shokai 57-202966 JP 2005-162303 A

  Therefore, the object of the present invention is to solve the above-mentioned problems, and can be easily torn along the planned opening line from the fold portion at the side end of the pillow type bag, and the jointed heat-bonding portion can be easily torn. In addition, a plurality of scheduled opening lines are formed at predetermined intervals, and when the contents stored in the bag are dispensed, the contents can be easily removed by tearing along the planned opening lines according to the remaining amount. It is to provide an openable packaging bag.

In order to achieve the above object, the present invention according to claim 1 is provided with a planned opening line in which straight cuts of a predetermined length for tearing and opening are intermittently arranged in a straight line. A packaging material formed by laminating at least a base material layer and a heat-adhesive resin layer as the innermost layer, with the heat-adhesive resin layer surfaces facing each other and the planned opening line being perpendicular to the longitudinal direction Pillow type which is formed in a cylindrical shape by providing a palm heat bonding portion in the longitudinal direction, and by providing an edge thermal bonding portion at both open ends, and the opening line is located between the edge thermal bonding portions in the bag, the scar group through only the base layer opening scheduled line and in a region straddling the intersection of the rafter heat-bonding portion is formed, in a region where the scar group straddles the opening scheduled line, the opening will line Scratches that do not form a group of scratches with a certain width across That it comprises a free area is easily openable packaging bag according to claim.

  Further, the present invention according to claim 2 is characterized in that, in the easy-open packaging bag according to claim 1, a plurality of the expected opening lines perpendicular to the palm heat-bonding portion are formed at a predetermined interval. It is.

Moreover, this invention of Claim 3 is an easily openable packaging bag of Claim 1 or 2, WHEREIN: Between the surface side of the said base material layer and / or the said base material layer and the said thermoadhesive resin layer. Is provided with an easily tearable material layer .

  The invention according to claim 1 is provided with the planned opening line between the edge thermal bonding portions, and a group of scars penetrating only the base material layer in a region straddling the intersection between the planned opening line and the palm thermal bonding portion. By adopting the formed configuration, it can be easily torn along the planned opening line from the fold part at the side edge of the pillow type bag, and the alignment position of the planned opening line is shifted especially at the jointed heat-bonding part. However, there is an effect of easily tearing the jointed heat-bonding portion.

Moreover, in the area | region where the said scar group straddles the said opening schedule line, it is provided with the scar group non-formation area | region in which the said scar group of a fixed width is formed across the said opening schedule line, and the opening schedule line and the scar are formed in the base material layer. In the step of forming the group, the step of laminating the base material layer and the heat-adhesive resin layer, etc., there is no cutting of the web, and stable processing is obtained .

Further, in the present invention according to claim 2 , each time the take-out contents stored in the bag are dispensed by a plurality of the planned opening lines orthogonal to the palm-clad heat-bonding portion being formed at a predetermined interval, The packaging material can be folded to re-seal the opening, and the next dispensing can be easily opened by the dispensing function that allows the packaging material to be removed by tearing off the planned opening at the position corresponding to the remaining amount and the contents to be easily removed. Can be applied to the packaging bag .

In addition, the present invention according to claim 3 provides a planned opening line by providing an easily tearable material layer between the surface side of the base material layer and / or between the base material layer and the thermal adhesive resin layer. Along the line, it can be further linearly torn, and an opening having a beautiful tear opening line can be obtained.

The above-described present invention will be described in detail below with reference to the drawings.
1 is a front view and a back view showing one embodiment of an easy-open packaging bag according to the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIG. 3 is a production of the easy-open packaging bag of FIG. 4 is a development view of the packaging material used in FIG. 4, FIG. 4 is a cross-sectional view taken along line YY of FIG. 3, and FIG. 5 is an enlarged view showing two or three examples of scars forming the scar group of one embodiment. Among them, 1 is an easy-open packaging bag, 2 is a packaging material, 3 is a straight cut, 4 is 4a, 4b is a planned opening line, 5 is a joint heat bonding part, 5'a, 5'b is a joint heat bonding part 6a and 6b are edge thermal bonding portions, 6a 'and 6b' are edge thermal bonding portion planned portions, 7 are fine cuts, 8 is a puncture hole, 10 is a base material layer, and 11 is thermal adhesiveness. Resin layer, P1, P2, P3, P1 ′, P2 ′, and P3 ′ are intersection points, Q1, Q2, and Q3 are scar groups, R1, R2, and R3 are scar-group-unformed regions, and L is the length of the easy-open packaging bag W is the width of the easy-open packaging bag Respectively.

  FIG. 1 is a view showing an embodiment of an easy-open packaging bag according to the present invention, in which (A) is a front view, (B) is a rear view as seen from the side of a palm heat-bonding portion, and FIG. It is XX sectional drawing, Comprising: The cross section of the part containing a scar group in the vicinity of a scheduled opening line is shown. As shown in FIGS. 1 and 2, the easy-open packaging bag 1 according to the present invention is formed with a planned opening line 4 in which straight cuts 3 of a predetermined length for tearing and opening are intermittently arranged in a straight line. The packaging material 2 formed by laminating the base material layer 10 and the heat-adhesive resin layer 11 as the innermost layer, the surfaces of the heat-adhesive resin layers 11 face each other, and the planned opening line 4 is perpendicular to the longitudinal direction. As shown in the figure, the thermal bonding portion 5 is provided in the longitudinal direction to form a cylinder, and the edge thermal bonding portions 6a and 6b are provided at both ends of the opening, and the planned opening line between the edge thermal bonding portions 6a and 6b. 4 is a long pillow type bag formed so that 4 is located. In FIG. 1 (b), the palm-to-hand thermal bonding portion 5 is bent leftward inside the portion 5 and tilted to the left.

  The planned opening line 4 is provided in the vicinity of the edge thermal bonding part 6a, and the planned opening lines 4a and 4b similar to the planned opening line 4 orthogonal to the joint thermal bonding part 5 are bonded to the planned opening line 4 and edge thermal bonding. It is formed at a predetermined interval between the portion 6b. Scratch groups Q1, Q2, and Q3 penetrating only the base material layer 10 are formed in the region straddling the intersection points P1, P2, and P3 of the planned opening lines 4, 4a, and 4b and the palm-to-palm heat bonding portion 5. As shown in FIG. 2, the scar groups Q1, Q2, and Q3 are provided only in the region where the palm heat-bonding portion 5 is bent and tilted, so that they are not actually visible in FIG. Indicated. In FIG. 2, only the scar group Q2 is visible. In the embodiment of the easy-open packaging bag 1 according to the present invention, the example of forming the three opening lines 4, 4a, and 4b has been shown, but the contents stored in the easy-open packaging bag 1 can be easily taken out. In consideration of this, a plurality of lines can be formed. Further, when only one planned opening line is required, only the planned opening line 4 may be provided in the vicinity of the edge thermal bonding portion 6a. By forming a plurality of planned opening lines in this way, for example, when storing a plurality of substantially rectangular parallelepiped or columnar solids in an easy-open packaging bag, the packaging material is opened from the planned opening line 4. After the necessary number is taken out, the opening can be resealed by folding the packaging material. Further, after that, when taking out the remaining solid matter, the packaging material is cut off at the planned opening line 4a or 4b, and the remaining solid matter can be easily taken out. By providing a plurality of opening schedule lines, the function of dispensing the contents is provided, and a convenient and easy-open packaging bag is obtained.

  FIG. 3 is a development view of the packaging material 2 used for producing the easy-open packaging bag 1 of FIG. 1 and shows a state seen from the surface (base layer side), and FIG. It is -Y sectional drawing, and shows the cross section of a right angle direction to the palm heat-bonding part scheduled part 5'a in the part of the scar group Q2. The hatched portion in FIG. 3 shows a portion to be thermally bonded, and the jointed thermal adhesive portion planned portion 5′a and the jointed thermal adhesive portion planned portion 5′b are heated with the thermal adhesive resin layers 11 facing each other. It is a part which adheres and becomes the joint heat-bonding part 5, The joint heat-bonding part planned part 5'a becomes the side by which the joint heat-bonding part 5 is bent and falls down. As shown in FIGS. 3 and 4, the base layer 10 is formed in a region straddling the intersections P 1 ′, P 2 ′, P 3 ′ between the planned opening lines 4, 4 a, 4 b and the inside of the jointed thermal bonding part planned part 5 ′ a. A scar group Q1, Q2, and Q3 penetrating only the film is formed. The scar groups Q1, Q2, and Q3 are the same, and the scar group Q2 will be described as an example. The scar group Q2 extends over the planned opening line 4a and includes a scar group non-formed region R2 in which a fixed width scratch group Q2 is not formed in the direction between the edge thermal bonding portion planned parts 6a ′ and 6b ′ in parallel with the planned opening line 4a. This is a configuration provided. Similarly, the scar groups Q1 and Q3 are provided with scar group non-formed regions R1 and R3 in which no scar group is formed. With such a configuration, the fold portion at the side end where the packaging material 2 of the easy-open packaging bag 1 is folded, which is torn from the planned opening line 4 at the fold portion at the right side end in FIG. Thus, the easy-open packaging bag 1 can be easily opened, and can be easily opened even when it reaches the joint heat-bonding portion 5. Similarly, it can be easily opened by tearing from the expected opening lines 4a and 4b at the side end folds. Note that the scar groups Q1, Q2, and Q3 have intersections P1, P2, and P3 between the planned opening lines 4, 4a, and 4b on the side of the joint-to-join thermal bonding portion 5′b and the inside of the joint-to-join thermal bonding portion 5′b. It can also be provided in the straddling region.

  FIGS. 5A and 5B illustrate a few shapes of scars constituting the scar groups Q1, Q2, and Q3. FIG. 5 (a) shows a shape in which the fine cut 7 is formed in a straight line parallel to the expected opening line 4, and the fine cut 7 preferably has a cut length of 0.5 to 2.0 mm. 0.5 to 1.0 mm is more preferable. The direction of the fine cut 7 is not particularly limited, but is preferably formed in parallel with the planned opening line 4. Further, the shape of the fine cut 7 may be a straight line, a bent line, a curve, or the like. FIG. 5B shows a shape in which a plurality of fine piercing holes 8 are formed. The size of the puncture holes 8 is preferably 0.5 to 2.0 mm and provided at intervals of 0.5 to 2.0 mm. The shape of the puncture hole 8 may be a circle, an ellipse, or a square. Moreover, what mixed the fine cut | interruption 7 and the piercing hole 8 may be used. The fine cuts 7 and / or the piercing holes 8 of the scar groups Q1, Q2, Q3 are the bent portions on the side where the palm heat-bonding portion 5 is bent and folded, in FIG. 3, centering on the intersections P1 ′, P2 ′, P3 ′ It is preferable to form in the area | region which straddles the inner side of the joint thermal-bonding part scheduled part 5'a. By constructing in this way, tearing along the planned opening line from the planned opening lines 4, 4a, 4b of the folds on the right side end of the easy-open packaging bag 1 in FIG. Even when it reaches 5, it can be easily torn and opened.

  As shown in FIG. 3, it is preferable that the scar groups Q1, Q2, and Q3 are formed to have a size of about 10 to 20 mm square in the regions straddling the planned opening lines 4, 4a, and 4b. When the opening position of the planned opening lines 4, 4a, 4b is shifted at the joint thermal bonding part 5, the opening is started along the scheduled opening lines 4, 4a, 4b from the fold part at the side end of the easy-open packaging bag 1. When reaching the heat-bonding portion 5, it is difficult to open the seal, and it takes a hand gap to open the seal. However, with this configuration, even if it reaches the joint heat-bonding portion 5, the scar group Q1, Q2, Q3 The joint heat bonding part 5 can be easily torn and opened. The scar group non-formed region R1, R2, R3 is located at the center of the scar group Q1, Q2, Q3 in the vertical direction (the direction between the edge thermal bonding portion planned portion 6a ′ and the edge thermal bonding portion planned portion 6b ′). As shown in the figure, the unscheduled lines 4, 4a, 4b are crossed and formed in areas of a certain width in the vertical direction in parallel with the planned open lines 4, 4a, 4b, and the scar groups Q1, Q2, Q3 are formed in the vertical direction. Divided by the scar-unformed region R1, R2, R3. Although the scar group non-formation regions R1, R2, and R3 do not need to be provided, in the step of forming the planned opening line or the scar group on the base material layer, the step of laminating the base material layer and the thermoadhesive resin layer, etc. It is preferable to provide it because it can be stably processed without cutting. The vertical width of the scar group non-formed regions R1, R2, and R3 is about 1 to 3 mm.

  Further, the linear cut 3 is formed so as to penetrate the base material layer 10, and the length is preferably 0.3 to 5.0 mm, the processing is difficult when the length is less than 0.3 mm, and the processing is performed when the length exceeds 5.0 mm. Sometimes the base material layer 10 is easily cut. Further, the distance between the straight cut 3 and the straight cut 3 is preferably 0.3 to 0.5 mm, and if it is less than 0.3 mm, it is difficult to process, and if it exceeds 0.5 mm, it is adjacent to the straight cut 3 when tearing. Good bridging to the straight cut 3 becomes difficult.

  The planned opening lines 4, 4a, 4b and the scar groups Q1, Q2, Q3 are the same as printing in the process of printing the base material layer 10, and the planned opening lines and the cutting edges of the scar groups are simultaneously formed. A scheduled opening line and a scar group penetrating the base material layer 10 at a predetermined position can be formed in synchronization with the printing position by a rotary die roll provided. Alternatively, after printing on the base material layer 10, it is also possible to form a planned opening line and a scar group penetrating the base material layer 10 by a rotary die cutter or the like at a predetermined position.

  Moreover, until now, although the description has been given by taking as an example the packaging material 2 composed of the base material layer 10 and the thermoadhesive resin layer 11, the surface side of the base material layer 10 and / or the base material layer 10. An easily tearable material layer such as cellophane, paper, aluminum foil, and a hand-cut film may be provided between the heat-adhesive resin layer 11 and the heat-adhesive resin layer 11. Examples of the film having a hand cutting property include a polyester film having a thickness of 6 μm or less, an easily tearable polyester in which at least two types of polyester resin layers having different melting points are laminated, and a polypropylene film having a linear cut property in a transverse uniaxial direction. (For example, YT42 manufactured by Toray Industries, Inc.) and polyethylene films (for example, Calalian Y manufactured by Toyo Chemical Co., Ltd.) are exemplified.

The layer structure of the packaging material 2 used in the easy-open packaging bag 1 according to the present invention is determined so as to satisfy the required quality in consideration of gas barrier properties, strength, suitability for automatic packaging machines, and the like depending on the contents to be packaged. The As the film used for the base material layer 10, a well-known biaxially stretched film made of a resin such as polypropylene, polyamide, or polyester can be used, and as the heat adhesive resin used for the heat adhesive resin layer 11, low Density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-α olefin copolymer, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, Known heat-adhesive resins such as an acid copolymer of ethylene and acrylic acid and an ester copolymer of ethylene and acrylic acid ester can be used, and as a method of laminating each layer, a known laminating method such as a dry lamination method or a sandwich lamination method is used. Method, the innermost layer thermoadhesive resin It may be laminated in the extrusion lamination method for 11. A specific laminated structure is illustrated below.
1) Substrate layer / printing layer / thermoadhesive resin layer 2) Substrate layer / printing layer / aluminum foil layer / thermoadhesive resin layer 3) Substrate layer / printing layer / aluminum foil layer / hand cutting property Film / thermoadhesive resin layer 4) film having tearability / substrate layer / printing layer / aluminum foil layer / thermal adhesive resin layer 5) printed layer / paper layer / substrate layer / thermal adhesive resin layer

Next, the present invention will be described in more detail with reference to the following examples.
[Example 1]
A biaxially stretched polyethylene terephthalate film (PET) having a thickness of 16 μm was used as a base material layer, and predetermined printing was performed on one side of PET by a gravure printing method, and a printed pattern layer was provided at a predetermined position on the peripheral surface. A scheduled opening line and a scar group penetrating the PET were formed using a rotary die cutter composed of a rotary die roll and an anvil roll provided with a cutting blade for forming a planned opening line and a scar group. Thereafter, a 7 μm thick aluminum foil (ALM) as an easy tear material layer and a 14 μm thick polyethylene terephthalate film (TPET) (trade name TF110, manufactured by Toyobo Co., Ltd.), and heat A low-density polyethylene film with a thickness of 30 μm is laminated on the adhesive resin layer by a dry lamination method (DL) through a urethane adhesive to form a structure of PET 16 μm / printed pattern layer / DL / ALM 7 μm / DL / TPET 14 μm / DL / LDPE 30 μm. A packaging material for an easy-open packaging bag was prepared.

  After that, the packaging material is cut into a rectangular shape with a development dimension of 200 mm long × 100 mm wide, and is formed into a cylindrical shape by providing a palm heat-bonding portion with a seal width of 10 mm in the longitudinal direction, and an edge with a seal width of 10 mm at one open end A pillow-type easy-open packaging bag 1 having a width (W) of 40 mm × length (L) of 200 mm, which is provided with a heat-bonding portion and having the other opened, is produced, and is approximately 12 mm thick × 20 mm wide × 30 mm long. 5 pieces of solid food in a rectangular parallelepiped are inserted through the opening of the easy-open packaging bag and vertically arranged in the length direction, and the opening is heat-sealed with an edge heat-bonding portion having a seal width of 10 mm, and the easy-open packaging shown in FIG. Enclosed in a bag. In addition, three opening lines were formed parallel to the side in the direction of the width of 100 mm, and the first line was provided at a position 15 mm from the end side, the second line 70 mm, and the third line 130 mm. As for the shape of the planned opening line, the length of the straight cuts was 3 mm, and the interval between the straight cuts was 0.3 mm. The area of the scar group is 10 mm in the width (W) direction × 16 mm in the length (L) direction, and is provided on the side where the palm heat-bonding part is folded and tilted, and the scar shape has a diameter of 0.5 mm and an interval of 0.5 mm. It was a hole. The width of the scar-unformed region was 2 mm across the planned opening line.

[Example 2]
A biaxially stretched polyethylene terephthalate film (PET) having a thickness of 16 μm was used as a base material layer, and predetermined printing was performed on one side of PET by a gravure printing method, and a printed pattern layer was provided at a predetermined position on the peripheral surface. A scheduled opening line and a scar group penetrating the PET were formed using a rotary die cutter composed of a rotary die roll and an anvil roll provided with a cutting blade for forming a planned opening line and a scar group. After that, the printed pattern layer surface is coated with polyethyleneimine anchor (AC), and low density polyethylene is melt melt extruded (PE) and sandwiched with 7μm thick aluminum foil (ALM), and urethane is applied to the ALM surface. Low-density polyethylene is melt-extruded (PE) through an anchor agent (AC) and extrusion-laminated to form a heat-adhesive resin layer. PET 16 μm / printed pattern layer / AC / PE 20 μm / ALM 7 μm / AC / PE 40 μm A packaging material for an easy-open packaging bag having the following structure was produced. Then, the same easy-open packaging bag 1 as Example 1 was produced. The same as Example 1 except that the configuration of the packaging material was different.

  The easy-open packaging bag produced in Examples 1 and 2 is opened from the first scheduled opening line 4 of the fold portion at the side end where the packaging material on the side opposite to the side where the palm heat-bonding portion is folded and folded. As a result, all of them could be easily torn along the planned opening line 4, and could be easily opened even when reaching the jointed thermal bonding part 5. Then, when two solid foods were taken out and the packaging material was folded, the opening was able to be resealed. After that, when the folded packaging material was expanded and teared along the corresponding second scheduled opening line 4a, it could be easily torn, and an opening was formed to take out the solid food.

It is the front view and back view which show one Embodiment of the easy-open packaging bag concerning this invention. It is the XX sectional view taken on the line of FIG. It is an expanded view of the packaging material used for preparation of the easily openable packaging bag of FIG. It is the YY sectional view taken on the line of FIG. It is an enlarged view which shows the example of 2-3 shapes of the scar which forms the scar group of one Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Easy-open packaging bag 2 Packaging material 3 Straight cut 4, 4a, 4b Planned opening line 5 Joint heat bonding part 5'a, 5'b Joint heat bonding part 6a, 6b Edge heat bonding part 6a ', 6b ′ Edge thermal bonding portion planned portion 7 Fine cut 8 Puncture hole 10 Substrate layer 11 Thermal adhesive resin layer P1, P2, P3, P1 ′, P2 ′, P3 ′ Intersection Q1, Q2, Q3 Scratch group R1 , R2, R3 Scratch group non-formation region L Length of easy-open packaging bag W Width of easy-open packaging bag

Claims (3)

A package formed by laminating at least a base material layer on which a planned opening line in which straight cuts of a certain length for tearing and opening are intermittently arranged in a straight line and an innermost heat-adhesive resin layer are laminated The material is formed into a tubular shape with the thermal adhesive resin layer surfaces opposed to each other and provided with a palm heat-bonding portion in the longitudinal direction so that the planned opening line is at right angles to the longitudinal direction. In the pillow type bag formed so that the opening expected line is located between the edge thermal adhesive portions by providing an edge thermal adhesive portion,
A group of scars penetrating only the base material layer is formed in a region straddling the intersection of the planned opening line and the joint thermal bonding part ,
An easily openable packaging bag comprising a scar group non-formation region in which the scar group having a constant width is formed across the planned opening line in a region where the scar group crosses the planned opening line . The easy-open packaging bag according to claim 1, wherein a plurality of the planned opening lines orthogonal to the palm-to-grind heat bonding portion are formed at a predetermined interval. The easy-open packaging according to claim 1 or 2, wherein an easily tearable material layer is provided between the surface side of the base material layer and / or between the base material layer and the thermoadhesive resin layer. bag.

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