JP2018070249A - Bag for packaging - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag for packaging which can be unsealed neatly with an opening tape and can prevent an adhesive layer from remaining after unsealing on a sheet material constituting a packaging bag.SOLUTION: A bag for packaging 1 formed in a bag shape by providing a side seal portions 3 on both end sides of a pair of sheet materials made of a synthetic resin includes: an opening tape 4 adhered via an adhesive layer 8 at a bottom side of the bag with respect to an opening side seal portion 3a provided on a bag upper portion; and a chuck 5 at a bottom side of the bag with respect to the opening tape 4. A pair of upper and lower perforation 6a, 6b extending in the bag width direction are formed on a front side sheet material 2b, and at least at the one end portion of the pair of upper and lower perforation 6a, 6b located at an inside of the bag with respect to the side seal portion 3, 3, a notch part 7a, 7b connecting the pair of the upper and lower perforation 6a, 6b are formed, and the opening tape 4 is adhered to cover the pair of the upper and lower perforation 6a, 6b from an outer surface side of the front side sheet material 2b. An adhesive strength of the adhesive layer 8 with the opening tape is made stronger than an adhesive strength with the front side sheet material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a packaging bag that is opened by peeling off an opening tape.

  Conventionally, some synthetic resin packaging bags have an opening-side seal portion that seals the inside of the bag at the top of the bag, and a tear-opening opening tape is provided closer to the bottom of the bag than the opening-side seal portion. It was. (For example, refer to Patent Documents 1 and 2.)

JP 2014-1114035 A JP 2009-51556 A

  However, in the above-mentioned Patent Documents 1 and 2, since the opening tape is adhered to the inside of the packaging bag via an adhesive layer, the sheet material constituting the packaging bag is simultaneously formed together with the opening tape at the time of opening. It was torn. For this reason, the opening tape may be broken due to tearing resistance, or the sheet material may be wrinkled or distorted to deteriorate its appearance. Furthermore, if the adhesive layer remains on the sheet material side when the opening tape is torn, the contents may adhere to the remaining adhesive layer.

  Accordingly, an object of the present invention is to provide a packaging bag that can be satisfactorily opened with an opening tape and that prevents an adhesive layer from remaining on the sheet material constituting the packaging bag after opening.

  In order to achieve the above object, the packaging bag of the present invention is formed in a bag shape by providing side seal portions on both sides of a pair of sheet materials formed of a synthetic resin, and an opening for sealing the inside of the bag on the bag upper side. A packaging in which an opening tape for providing a side seal portion and separating the one sheet material into a bag upper portion side and a bag bottom portion side from the opening side seal portion and opening it is bonded via an adhesive layer In the bag, a pair of upper and lower perforations extending in the bag width direction is formed in one of the sheet materials on the upper side of the bag, and at least one end portion on the inner side of the bag from the side seal portion of the upper and lower pair of perforations Forming a notch that connects the pair of upper and lower perforations, covering the pair of upper and lower perforations from the outer surface side of the sheet material, and bonding the opening tape to the opening tape side of the adhesive layer Strength is higher than the adhesive strength with the sheet material side It is characterized in that the Ku formed.

  Further, it is preferable that the cut portion is formed in a wedge shape in which the central portion in the vertical direction is convex toward the outer side of the bag. Furthermore, it is preferable that the cut portion is formed by a slit having a constant width. Furthermore, it is preferable that one of the perforations disposed below is provided with a bent portion that is bent toward the other perforation disposed above in the center. The pair of perforations may include auxiliary perforations on one or both sides of the bag in the vertical direction.

  Furthermore, it is preferable to emboss the adhesive surface of the opening tape to which the adhesive layer is adhered. In addition, it is preferable that the width of the side seal portion on the bag upper side on which the opening tape is provided is wider than the width of the side seal portion on the bag bottom side. Furthermore, the opening tape may include a knob at least at one end. In addition, it is preferable that a chuck is provided on the bottom side of the bag with respect to the opening tape so that the opening after opening can be freely opened and closed.

  According to the packaging bag of the present invention, a pair of upper and lower perforations in the bag width direction is formed on the upper side of one sheet material, and the opening tape is bonded to the pair of perforations from the outer surface side of the sheet material. Therefore, when the opening tape is peeled off, the sheet material is broken along the pair of perforations, and a part of the sheet material between the perforations is cut off while adhering to the adhesive layer on the opening tape side. The upper part of the bag and the lower part of the bag are separated from each other at the perforation, and the packaging bag can be satisfactorily opened. Furthermore, since the notch part which connects a pair of perforations is formed in the at least one end part inside a bag from the side seal part of a pair of perforations, a pair of perforations starts a break by a notch part. It is promoted and does not cause wrinkles or distortion in the sheet material. In addition, since the adhesive strength of the adhesive layer with the opening tape side is stronger than the adhesive strength with the sheet material side, some of the sheet material between the perforations is certain when the opening tape is peeled off. In addition, there is no possibility that the adhesive layer remains on the sheet material side while being attached to the opening tape side, and it is possible to improve the feeling of use of the packaging bag after opening and improve the hygiene.

  Moreover, by forming the cut portion in a wedge shape in which the central portion in the vertical direction is convex toward the outer side of the bag, breakage of the pair of perforations can be favorably promoted. Further, the one perforation arranged below has a bent portion bent toward the other perforation arranged above in the center portion, so that the portion surrounded by the bent portion after opening Can be used as a knob. Further, by providing the auxiliary perforation in one or both of the pair of perforated bags in the vertical direction, the sheet material can be broken by the opening tape with a small force.

  Furthermore, by embossing the adhesive surface of the opening tape to which the adhesive layer is bonded, the area where the adhesive layer contacts the opening tape side is wider than the area where the adhesive layer contacts the sheet material side, With a simple structure, the adhesive strength of the adhesive layer with the opening tape side can be made stronger than the adhesive strength with the sheet material side. In addition, the width of the side seal part on the top side of the bag, where the opening tape and chuck are provided, is wider than the width of the side seal part on the bottom side of the bag, thereby securing the volume of the packaging bag for storing the contents. However, the strength of the upper side of the bag can be ensured. Furthermore, by providing the knob on at least one end of the opening tape, the opening tape can be peeled off at the time of opening. Further, by providing a chuck for opening and closing the opened opening so as to be openable and closable on the bag bottom side of the opening tape, the contents can be satisfactorily accommodated after opening.

It is a front view of the packaging bag which shows the 1st form example of this invention. It is explanatory drawing before peeling similarly of a sheet | seat material and an opening tape. It is explanatory drawing after peeling similarly of a sheet | seat material and an opening tape. It is a principal part front view of the packaging bag which shows the 2nd form example of this invention. It is a principal part front view of the packaging bag which shows the 3rd form example of this invention. It is a principal part front view of the packaging bag which shows the 4th example of this invention. It is a principal part front view of the packaging bag which shows the 5th example of this invention. It is a principal part front view of the packaging bag which shows the 6th form example of this invention. It is a principal part front view of the packaging bag which shows the example of 7th form of this invention. It is a principal part front view of the packaging bag which shows the 8th example of this invention. It is a principal part front view of the packaging bag which shows the 9th form example of this invention. It is a principal part front view of the packaging bag which shows the 10th form example of this invention. It is a principal part front view of the packaging bag which shows the 11th form example of this invention.

  1 to 3 are views showing a first embodiment of the packaging bag of the present invention. The packaging bag 1 of the present embodiment is a front side sheet in which a synthetic resin multilayer laminated sheet material provided with a heat fusion layer and a non-heat fusion layer is folded at the bottom 2a with the heat fusion layers facing each other. The material 2b and the back side sheet material (not shown) are formed, and the side seal portions 3 and 3 are formed by heat-sealing both sides of the front side sheet material 2b and the back side sheet material to form a bag. .

  On the bag upper side of the packaging bag 1, there is provided an opening side seal portion 3a for sealing the inside of the bag after the contents are stored in the bag, and the front sheet material 2b on the bag bottom side with respect to the opening side seal portion 3a. The opening tape 4 for opening is provided with a chuck 5 on the bottom side of the bag from the opening tape 4. In this embodiment, since the packaging bag at the stage before the contents are accommodated in the packaging bag 1 is illustrated, the opening-side seal portion 3a is shown in a state before being sealed. ing.

  The front sheet material 2b is formed with a pair of upper and lower perforations 6a, 6b extending in the bag width direction on the upper side of the bag, and more than the side seal portions 3, 3 of the pair of upper and lower perforations 6a, 6b. Cut portions 7a and 7b that connect a pair of upper and lower perforations 6a and 6b are provided at both ends of the bag, and the cut portions 7a and 7b have a central portion in the vertical direction protruding toward the outside of the bag. Each is formed in a wedge shape. Further, the opening tape 4 is bonded to the outer surface of the front side sheet material 2b through the adhesive layer 8 so as to cover the pair of perforations 6a and 6b. The adhesive layer 8 is formed of an adhesive having a melt-solidifying property that is welded by heat and having a peel property. In this embodiment, the adhesive is applied to the back surface 4a (the adhesive surface of the present invention) of the opening tape 4. As a result, the adhesive layer 8 is formed.

  The opening tape 4 is formed of a resinous sheet in which a printed layer 4c is provided on the surface of a base material 4b having a barrier property, and the back surface 4a is embossed throughout. The embossing is performed, for example, by irradiating the back surface 4a with corona discharge. By performing the embossing, the surface area of the back surface 4a is increased, and the bonding characteristics are improved.

  The opening tape 4 having the adhesive layer 8 is disposed and heat-sealed from the outer surface side of the front sheet material 2b so as to cover the pair of perforations 6a and 6b with the adhesive layer 8. Both end portions of the opening tape 4 are heat-sealed over the side seal portions 3 and 3, respectively, but a predetermined length of both ends is not heat-sealed and remains as a non-adhesive portion, and this non-adhesive portion is opened. The knobs 4d and 4d are formed when the tape 4 is peeled off.

  In the packaging bag 1 formed as described above, the front sheet material 2b is broken along the pair of perforations 6a and 6b by grasping one knob 4d and peeling off the opening tape 4, and the perforation 6a. , 6b part of the front sheet material 2b becomes a cut line 2c, the cut line 2c is cut off while adhering to the adhesive layer 8 of the opening tape 4, and the upper side of the bag with the pair of perforations 6a, 6b as a boundary And the bag lower side are separated, and the packaging bag 1 can be satisfactorily opened. Further, since the notches 7a and 7b connecting the perforations 6a and 6b are formed at both ends inside the bag from the side seal portions 3 and 3 of the pair of perforations 6a and 6b, the perforations 6a and 6b. The cut start part 7a (7b) on the peeling start side of the opening tape 4 promotes the start of breakage and does not cause wrinkles or distortion in the front sheet material 2b. Furthermore, since the opening tape 4 is embossed on the back surface 4a and the bonding characteristics are improved, the adhesive strength of the adhesive layer 8 with the opening tape side is higher than the adhesive strength with the front sheet material side. When the opening tape 4 is peeled off, the cut line 2c between the perforations 6a and 6b is cut off while being securely attached to the opening tape side. Moreover, there is no possibility that the adhesive layer 8 remains on the sheet material side, and it is possible to improve the feeling of use of the packaging bag 1 after opening and improve the hygiene. Furthermore, since the opening can be freely opened and closed by the chuck 5 after opening, the contents can be well accommodated even after opening.

  FIGS. 4 to 13 show other embodiments of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. .

  FIG. 4 shows a second embodiment of the present invention. The notches 12a and 12b of the packaging bag 11 of the present embodiment are arcuate surfaces whose upper and lower central portions are convex toward the outside of the bag. Is formed.

  FIG. 5 shows a third embodiment of the present invention. In the packaging bag 21 of this embodiment, the width of the pair of perforations 22a and 22b is increased in the vertical direction, and the opening tape 4 is peeled off. In addition, the width of the cut line 2d that is cut off while adhering to the adhesive layer 8 of the opening tape 4 is increased.

  FIG. 6 shows a fourth embodiment of the present invention. In the packaging bag 31 of this embodiment, the vertical width of the pair of perforations 32a and 32b is widened, and the width of the cut line 2d is widened. In addition, serrated notches 33a and 33b are formed between the perforations 32a and 32b.

  FIG. 7 shows a fifth embodiment of the present invention. In the packaging bag 41 of this embodiment, the notches 42a and 42b are formed with slits having a constant width, and the opening tape 4 is smoothly opened when opened. It can be peeled off. (Please check if the effect of this example is good.)

  FIG. 8 shows a sixth embodiment of the present invention. A packaging bag 51 of this embodiment is formed by forming a pair of perforations 52a and 52b from the inside of the bag rather than the side seal portions 3 and 3. Cut portions 53a and 53b are formed at both ends of the eyes 52a and 52b.

  FIG. 9 shows a seventh embodiment of the present invention, and the packaging bag 61 of the present embodiment has a plurality of convexities toward one side outside the bag between the pair of perforations 6a and 6b. A wedge-shaped cut portion 62 is provided so that a continuous click sensation can be obtained when the opening tape 4 is peeled off to cut the cut line 2c.

  FIG. 10 shows an eighth embodiment of the present invention, and the packaging bag 71 of this embodiment is directed to the central portion of the perforation 72b disposed below and toward the perforation 72a disposed above. A bent portion 72c to be bent is formed, the opening tape 4 is peeled off, and the cut line 2c is cut off, and then a portion surrounded by the bent portion 72c becomes a knob portion 73. Thereby, the grip part 73 can be grasped after opening and the chuck 5 can be opened and closed satisfactorily.

  FIG. 11 shows a ninth embodiment of the present invention. The pair of perforations 82a and 82b provided in the packaging bag 81 of the present embodiment is formed by sandwiching the perforations 82a and 82b, One auxiliary perforation 82c is provided on the lower side. The auxiliary perforations 82c have the same length as the perforations 82a and 82b, and are formed in parallel with the perforations 82a and 82b.

  FIG. 12 shows a tenth embodiment of the present invention, and the pair of perforations 92a and 92b provided in the packaging bag 91 of the present embodiment is located above the bag where the perforations 92a and 92b are not cut. Auxiliary perforations 92c are provided at the bottom of the bag. Since the auxiliary perforations 82c and 92c are formed in addition to the perforations 82a, 82b, 92a and 92b as in the eighth embodiment and the present embodiment, the front sheet is opened with the opening tape 4 with a small force at the time of opening. The material 2b can be broken.

  FIG. 13 shows an eleventh embodiment of the present invention. The side seal portion 102 provided in the packaging bag 101 of the present embodiment is the same as the side seal portion 102 at the top of the bag where the opening tape 4 and the chuck 5 are provided. The width is formed wider than the width of the side seal portion 102 on the bag bottom side where the contents are accommodated, and the opening tape 4 is heat sealed from one side end to the other side end of the front side sheet material 2b. . The side seal portion 102 is formed with a U-shaped cut line 103 surrounding the bag top side and the bag bottom side on the end side of the opening tape 4, and by cutting the cut line 103, the end portion of the opening tape 4 A knob portion 104 is formed by the side seal portion 102 cut out continuously from the end portion.

  The packaging bag 101 formed in this way is formed by forming the width of the side seal portion 102 on the upper side of the bag to which the opening tape 4 is bonded wider than the width of the side seal portion 102 on the bottom side of the bag. The strength on the upper side of the bag can be ensured while securing the volume for storing objects. Furthermore, since the knob | pick part 104 is wider than the opening tape 4, it is easy to grasp and can open the opening tape easily at the time of opening. Moreover, since it cannot open without cutting the tear line 103, tampering with the contents can be prevented.

  In addition, this invention is not restricted to each above-mentioned form example, You may apply | coat an adhesive with the width | variety equivalent to the width | variety of an opening tape, covering the perforation of a front side sheet material, and may form an adhesive layer. Further, the back surface of the opening tape is embossed by corona discharge irradiation, but embossing can be performed not only by corona discharge irradiation but also by a known method such as embossing. In addition, by forming the adhesive layer in multiple layers and forming the adhesive strength of the layer provided on the opening tape side stronger than the adhesive strength of the layer provided on the sheet material side, the adhesive strength of the adhesive layer with the opening tape side Can be made stronger than the adhesive strength on the sheet material side. In this case, there is no problem even if the back surface of the opening tape is not embossed. Moreover, the picking part and the notch part of the opening tape are not limited to those provided on both sides of the packaging bag, but may be provided on either one of the side parts. Further, a pair of perforations and cuts may be provided on the back sheet material, and the opening tape may be adhered to the outer surface of the back sheet material so as to cover the perforations. The present invention can also be applied to packaging bags that do not include a chuck.

  DESCRIPTION OF SYMBOLS 1 ... Packaging bag, 2a ... Bottom part, 2b ... Front side sheet material, 2c, 2d, 2e ... Cut line, 3 ... Side seal part, 3a ... Opening side seal part, 4 ... Opening tape, 4a ... Back side, 4b ... Base 4c ... printed layer, 4d ... knob, 5 ... chuck, 6a, 6b ... perforation, 7a, 7b ... notch, 8 ... adhesive layer, 11, 21, 31, 41, 51, 61, 71, 81, 91, 101 ... packaging bags, 12a, 12b ... notches, 22a, 22b ... perforations, 32a, 32b ... perforations, 33a, 33b ... notches, 42a, 42b ... notches, 52a, 52b ... perforation, 53a, 53b ... notch, 62 ... notch, 72a, 72b ... perforation, 72c ... bend, 73 ... knob, 82a, 82b ... perforation, 82c ... auxiliary perforation, 92a , 92b ... perforation, 92c ... auxiliary perforation

Claims (9)

Side seal portions are provided on both sides of a pair of sheet materials formed of a synthetic resin to form a bag, and an opening side seal portion for sealing the inside of the bag is provided on the top side of the bag. On the side, in the packaging bag in which the opening tape for separating and opening the one sheet material into the bag upper side and the bag bottom side is bonded via an adhesive layer, the one sheet material on the bag upper side, A pair of upper and lower perforations extending in the bag width direction are formed, and a notch portion that connects the pair of upper and lower perforations is formed at least at one end inside the bag from the side seal portion of the pair of upper and lower perforations. And
Covering the pair of upper and lower perforations from the outer surface side of the sheet material, bonding the opening tape, and forming the adhesive layer with the opening tape side stronger than the adhesive strength with the sheet material side Characteristic packaging bag. The packaging bag according to claim 1, wherein the cut portion is formed in a wedge shape in which a central portion in the vertical direction is convex toward the outside of the bag. The packaging bag according to claim 1 or 2, wherein the cut portion is formed by a slit having a constant width. One of the perforations arranged below is provided with a bent portion bent toward the other perforation arranged above in the center. Item 1. A packaging bag according to item 1. The packaging bag according to any one of claims 1 to 4, wherein the pair of perforations includes auxiliary perforations on one or both sides in the bag vertical direction. The packaging bag according to any one of claims 1 to 5, wherein the adhesive surface of the opening tape to which the adhesive layer is bonded is embossed. The packaging according to any one of claims 1 to 6, wherein a width of the side seal portion on the upper side of the bag on which the opening tape is provided is formed wider than a width of the side seal portion on the bottom side of the bag. Bags. The packaging bag according to any one of claims 1 to 7, wherein the opening tape includes a knob at least at one end. The packaging bag according to any one of claims 1 to 8, wherein a chuck for opening and closing the opening after opening is provided closer to the bottom of the bag than the opening tape.

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