JP2016098035A - Packaging bag with fastener - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a childproof packaging bag with a fastener that is suitable for manufacture.SOLUTION: A packaging bag with a fastener includes: a bag body 50 having at least front and rear surfaces; and a first fastening tape T1 disposed more adjacent to the bottom than an opening or part to be opened 3 of the bag body 50. The first fastening tape T1 is composed of a male tape member 10 and a female tape member 20. The male tape member 10 is provided to one of the front and rear surfaces of the bag body 50 whereas the female tape member 20 is provided to the other of the front and rear surfaces of the bag body 50. The upper and bottom portions of the first fastening tape T1 have large fitting strength, and a part of the first fastening tape T1 serves as a weak engaging part.SELECTED DRAWING: Figure 1

Description

  The present invention belongs to the technical field of flexible packaging bags made of flexible packaging material, and relates to a packaging bag with a chuck.

  Conventionally, various packaging bags made of flexible packaging materials have been used to store and sell foods, daily necessities, and the like. As one form of such a packaging bag, one having a so-called child proof function is known so that a child including an infant does not open it by mistake. For example, the one described in Patent Document 1 is a packaging bag in which a notch for opening is provided in a part of a surrounding heat seal portion, a through hole is formed in the heat seal portion, and a notch is formed on the outer peripheral edge of the through hole. It is formed so as to open in communication with the housing part, and has a structure including a peelable covering seal on the surface of the packaging bag so as to cover the through hole and the notch. It is possible to prevent a part of the packaging bag from being broken starting from the notch and causing the packaging bag to be opened or the contents to flow out.

JP 2013-180827 A

  The above-mentioned packaging bag with a child proof function heat seals the periphery of the ends of a pair of body members on both side surfaces to form an accommodating portion, and the contents are accommodated in the accommodating portion. Although it is a type in which a notch for opening is provided in part, a packaging bag with a chuck attached is desired to have a child proof function. However, there is no such packaging bag at present.

  This invention is made | formed in view of such a situation, The place made into the objective is to provide the packaging bag with a chuck | zipper which has the child proof function and was excellent in manufacture aptitude.

  A packaging bag with a chuck according to the present invention is a packaging bag with a chuck formed by a bag body having at least front and back surfaces, and a first chuck tape attached to the bottom side of the opening or the planned opening of the bag body. The first chuck tape includes a male tape member and a female tape member, the male tape member is attached to one of the front and back surfaces of the bag body, and the female tape member is Attached to the other of the front and back surfaces of the bag body, the first chuck tape has a high fitting strength on the upper side and the bottom side, and a part of the first chuck tape is a weak fitting portion. It is formed so that it becomes.

  A manufacturing method of a packaging bag with a chuck according to the present invention is a manufacturing method of a bag with a chuck provided with a first chuck tape having a high fitting strength on an upper side and a bottom side, and the first chuck tape is attached to the manufacturing method. A step of preparing a packaging bag in which an open edge other than the bottom is closed, a step of forming a weak fitting portion on the first chuck tape, and after filling the contents from the open portion of the bottom, And heat-sealing so as to close the opened portion.

  The packaging bag with a chuck according to the present invention has a child proof function because the infant cannot take out the first chuck tape, and the infant cannot take out the contents filled in the packaging bag. It becomes. Moreover, since it can suppress that the fitting of a 1st chuck tape remove | deviates when filling the contents from a bottom part, it is excellent in the manufacture aptitude of a packaging bag.

It is a front view which shows the packaging bag with a chuck | zipper by embodiment which concerns on this invention. It is sectional drawing which shows the case where the packaging bag of FIG. 1 is cut | disconnected along XX. It is an enlarged view of the 1st chuck tape of FIG. It is a figure which shows the measuring method of the fitting strength of a chuck tape.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. Note that, in the drawings attached to the present specification, for convenience of illustration and understanding, the scale and vertical / horizontal dimension ratios are appropriately changed and exaggerated from those of the actual ones. Moreover, the packaging bag in this invention refers not only to the packaging bag in the state in which the content is not accommodated but the packaging bag in the state in which the content was accommodated.

(Packaging bag)
1 and 2 show a packaging bag P of the embodiment. The packaging bag P according to the embodiment is formed by a bag body 50 having at least front and back surfaces, and a first chuck tape T1 attached to the bottom side of the opening or planned opening 3 of the bag body 50. . The first chuck tape T1 is composed of a male tape member 10 and a female tape member 20, and the male tape member 10 is attached to one of the front and back surfaces of the bag body 50, and the female tape member 20 is a bag. Attached to the other of the front and back surfaces of the main body 50, the first chuck tape T1 has a high fitting strength on the upper side and the bottom side, and a part of the first chuck tape T1 is weakly fitted. It is formed to be a joint.

(Bag body)
As shown in FIG. 1 and FIG. 2, the bag body 50 includes a bottom film 2 having a first surface 2 a and a second surface 2 b between two body films 1 with a folded portion as a boundary. Insert so that the folding part is on the inside, and heat-seal so as to close the open edge excluding the lower edge of the second surface 2b and the lower edge of the body film 1 facing the second surface 2b. Thus, the left and right side seal portions 4, the upper seal portion 6, the bottom seal portion 7, the first gusset portion 71, and the second gusset planned portion 72 are formed. As described later, the bottom gusset is formed by filling the contents from the opening portion of the second gusset portion 72 and then heat-sealing so as to close the opening portion of the second gusset portion 72. A part is formed, and a packaging bag in the form of a standing pouch is obtained.

  As shown in FIG. 1, the bag body 50 includes a planned opening 3 that extends from the left edge of the bag body to the right edge. The planned opening 3 may be provided with easy-opening means for easily opening. For example, the easy opening means may include an easy opening line such as a half-cut line formed by laser processing or a cutter. Further, a stretched film may be included in the film constituting the body film 1 so that the stretched direction of the stretched film and the direction in which the planned opening portion 3 extends coincide with each other. Further, a notch may be formed in the edge portion of the planned opening portion 3, that is, the side seal portion 4, and the notch is shown as 5 in FIG. Although not shown, a scar group may be formed instead of the notch 5. The scar group may be provided so as to penetrate the film L, or may be provided so as to penetrate only the surface layer, that is, the base material layer La of the film L described later. Further, the planned opening portion 3 may be provided with a display for indicating to the user that it is an opening location by printing or the like.

  The film L used for the bag body 50 includes at least a plastic film, and as shown in FIG. 2, it can be a laminated film in which a sealant layer Lb is laminated on at least a base material layer La. The laminated film can be formed by using a known dry lamination method or extrusion lamination method (sandwich lamination method).

  As the base layer La, a plastic film such as polyamide (PA) such as polyethylene terephthalate (PET), polypropylene (PP), nylon 6, nylon 66, MXD6 (polymetaxylylene adipamide) can be used. Moreover, it is preferable that the plastic film which comprises base material layer La is extended | stretched, and may be used individually or may be laminated | stacked and used.

  The sealant layer Lb includes low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic. An acid ester copolymer, polypropylene (PP), or a copolymer thereof can be used. The sealant layer La may be formed by laminating the above resin into a film shape by a dry lamination method or an extrusion lamination method, or may be laminated by extrusion coating the above resin.

  Also, depending on the contents to be filled, the handling conditions after filling, or the required performance such as water vapor and other gas barrier properties, light shielding properties, various mechanical strengths, the base material layer and the sealant layer For example, a water vapor or other gas barrier layer, a light shielding layer, a strength improving layer, or the like may be laminated as an intermediate layer. When the intermediate layer is a gas barrier layer, the intermediate layer includes a metal foil such as saponified ethylene / vinyl acetate copolymer, polyvinylidene chloride, polyacrylonitrile, aluminum foil, a vapor deposition layer such as silica, alumina, aluminum, or PVDC. A plastic film or the like provided with a coating layer can be used. Among these, a plastic film provided with a metal foil or an aluminum vapor deposition layer is opaque and can also serve as a light shielding layer. Moreover, when making an intermediate | middle layer into a strength improvement layer, the plastic film mentioned by base-material layer La can be used.

(Chuck tape)
The first chuck tape T1 comprises a combination of a male tape member 10 having a male fitting portion and a female tape member 20 having a female fitting portion. The first chuck tape T1 is provided in parallel with the planned opening portion 3 across the left and right side seal portions 4. In FIG. 1, the first chuck tape T1 is connected to the planned opening portion 3. An example provided in parallel is shown. The phrase “arranged in parallel” is not only an example in which the first chuck tape T1 is disposed in parallel with the planned opening portion 3, but also the first chuck tape T1 is disposed so as not to intersect the planned opening portion 3. It is a concept including the example to be done. FIG. 3 is an enlarged view of the first chuck tape T1 in FIG. 2, in which the symbol A indicates the upper side of the packaging bag P, and the symbol B indicates the bottom side of the packaging bag P.

  The male tape member 10 includes a tape-shaped second base portion 14 that is heat-sealed to the film L constituting the bag body 50, a first base portion 11 that is connected to the second base portion 14, and a first base portion 14. The base portion 11 of the head portion 12 extends in the longitudinal direction and a head portion 13 having a substantially semicircular cross section formed at the tip of the stem portion 12. A locking step portion 13a and a second locking step portion 13b are formed.

  The female tape member 20 includes a tape-like second base 24 that is heat-sealed to the film L constituting the bag body 50, a first base 21 that is connected to the second base 24, and a first The first arm portion 22 and the second arm portion 23 each have a bifurcated shape from the base portion 21 and have a substantially arc-shaped cross section and extend in the longitudinal direction. A first locking claw portion 22 a protruding inward is formed, and a second locking claw portion 23 a protruding inward is formed at the tip of the second arm portion 23.

  A gap having the same width as the trunk portion 12 of the male tape member 10 is provided between the first locking claw portion 22a of the female tape member 20 and the second locking claw portion 23a facing the first locking claw portion 22a. The head 13 of the male tape member 10 is fitted into a recess having a semicircular cross section formed by the first arm portion 22 and the second arm portion 23 of the female tape member 20. It is like that.

  The surface of the first locking step 13a facing the first locking claw 22a is inclined from the first head 13 side of the male tape member 10 to the base 11 side. That is, in the sagittal surface of the packaging bag P, the first locking step portion 13a and the trunk portion 12 are formed to have an acute angle. Thereby, the catch of the 1st latching step part 13a and the 1st latching claw part 22a is maintained, and the 1st latching claw part 22a becomes difficult to remove from the 1st latching step part 13a. Yes. Further, the surface of the second locking step portion 13b facing the second locking claw portion 23a is inclined from the head 13 side of the male tape member 10 to the first base portion 11 side. That is, in the sagittal surface of the packaging bag P, the second locking step portion 13b and the trunk portion 12 are formed to have an acute angle. Thereby, the catch between the second locking step portion 13b and the second locking claw portion 23a is maintained, and the second locking claw portion 23a is difficult to come off from the second locking step portion 13a. Yes.

  Various materials can be used as the material of the male tape member 10 and the female tape member 20 constituting the first chuck tape T1, and among them, a crystalline polyolefin resin is preferable. Examples of the crystalline polyolefin resin include polyolefin copolymers such as polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer, and ethylene-α-olefin copolymer. The melt flow rate (JIS K 7210) of the crystalline polyolefin resin is preferably 0.5 to 20 g / 10 minutes. When the melt flow rate is less than 0.5 g / 10 min, the extrusion moldability is inferior, and when the melt flow rate exceeds 20 g / 10 min, the shape stability is inferior.

  Known materials such as a stabilizer, an antioxidant, a lubricant, an antistatic agent, and a colorant may be added to the materials of the male tape member 10 and the female tape member 20 as necessary. Further, the second base portions 14 and 24 may not be provided.

  The male tape member 10 and the female tape member 20 can be molded using, for example, an extrusion molding method. The material is melt-kneaded using an extruder, and openings having the same shape as the cross section thereof are formed. Manufactured by extruding molten material from a die having cooling and solidifying by cooling.

  For example, the first chuck tape T1 is attached as follows. That is, the first chuck tape T1 in a state in which the male tape member 10 and the female tape member 20 are fitted is sandwiched between the two body films 1, and the periphery of the body film 1 is heated. At the same time as welding by sealing, the first chuck tape T1 is attached to the inner surface of the body film 1 by heat sealing.

  Next, the formation method of the weak fitting part is demonstrated. Specifically, after the first chuck tape T1 is attached to the bag body 50, the outer surface of the bag body 50 facing the male tape member 10 and the part of the bag body 50 facing the female tape member 20 are shown. By applying pressure from the outer surface and crushing the head portion 13 of the male tape member 10 and the first arm portion 22 and the second arm portion 23 of the female tape member 20 to deform them into a flat shape, a weak fit A joint is formed. At this time, in order to facilitate deformation, the bag body 50 may be heated from the outer surface of the portion facing the male tape member 10. The weak fitting portion may be formed when the first chuck tape T1 in a state where the male tape member 10 and the female tape member 20 are fitted to the bag body 50. Alternatively, before attaching the first chuck tape T1 with the male tape member 10 and the female tape member 20 fitted to the bag body 50, the outer surface of the male tape member 10 and the outer surface of the female tape member 20 are used. And pressurizing the head 13 of the male tape member 10 and the first arm portion 22 and the second arm portion 23 of the female tape member 20 to form a flat shape by weakly fitting them. A part may be formed. The weak fitting portion is formed in the range of 1 to 10 mm along the direction in which the first chuck tape T1 extends from the inner edge of one side seal portion 4 of the bag body 50 toward the other side seal portion 4. can do. The weak fitting portion is formed so that the fitting strength when measured using the measurement method described in Paragraph 0033 is 30 N or less.

  The manufacturing method of the packaging bag P is demonstrated. First, a packaging bag is prepared in which a first chuck tape is attached and an open edge other than the bottom is closed. Next, pressure is applied from the outer surface of the portion of the bag body 50 facing the male tape member 10 and the outer surface of the portion of the bag body 50 facing the female tape member 20, respectively, and the head 13 of the male tape member 10 and Then, the first arm portion 22 and the second arm portion 23 of the female tape member 20 are crushed and deformed into a flat shape to form a weak fitting portion on the first chuck tape. And after filling the content from the part which the bottom part opened, the packaging bag is manufactured by heat-sealing so that the part which the bottom part may open may be closed. For example, as shown in FIGS. 1 and 2, the first chuck tape T1 is attached to the body film 1, and the left and right side seal parts 4, the top seal part 6, the bottom seal part 7 and the first gusset part. 71. A packaging bag P on which a second gusset planned portion 72 is formed is prepared. Next, pressure is applied from the outer surface of the portion of the bag body 50 facing the male tape member 10 and the outer surface of the portion of the bag body 50 facing the female tape member 20, respectively, and the head 13 of the male tape member 10 and Then, the first arm portion 22 and the second arm portion 23 of the female tape member 20 are crushed and deformed into a flat shape to form a weak fitting portion on the first chuck tape. Then, after filling the contents from the open portion of the second gusset portion 72, the bottom gusset portion is formed by heat sealing so as to close the open portion of the second gusset portion 72 Thus, a packaging bag P in the form of a standing pouch is obtained. At this time, since the fitting strength on the bottom side of the first chuck tape T1 is increased, the fitting of the first chuck tape T1 is performed when the contents are filled from the bottom side of the packaging bag P. Can be prevented from coming off.

  Next, the usage method of the packaging bag P of embodiment is demonstrated. After opening the upper portion of the bag body 50 from the planned opening portion 3 of the bag body 50 to form an opening, the upper side of the bag body 50 is engaged with the weakly fitting portion of the first chuck tape T1. The first chuck tape T1 can be removed and the contents can be taken out. That is, after inserting a finger into the weakly fitting portion of the first chuck tape T1 from the upper side of the bag body 50, the finger is slid toward the portion other than the weakly fitting portion to thereby remove the first chuck tape T1. The contents can be taken out by removing the fitting. However, the infant cannot take out the contents because it does not lead to the idea of releasing the fitting by using the weak fitting portion of the first chuck tape T1 as a handle. Here, the infant in this invention refers to the child 5 years or younger.

  The fitting strength on the upper side of the first chuck tape T1 at a width of 50 mm is preferably 45 to 60N.

  The fitting strength on the bottom side of the first chuck tape T1 at a width of 50 mm is preferably 45 to 60N.

  For example, the fitting strength of the chuck tape can be measured as follows. First, the chuck tape is cut so that the width W2 is 50 mm. Then, using a Tensilon tensile tester (for example, RTC-1310A manufactured by Orientec Co., Ltd.), as shown in FIG. 4, the base of the male tape member 10 and the base of the female tape member 20 are in a straight line. In this way, the base of the male tape member 10 and the base of the female tape member 20 are pulled in the opposite directions at a pulling speed of 50 mm / min. Here, the fitting strength refers to the maximum tensile strength until the fitting of the chuck tape is released.

  In order to adjust the fitting strength, the shape of at least one of the head portion 13 of the male tape member 10 or the arm portions 22 and 23 of the female tape member 20 may be changed. The material may be changed without changing.

  Moreover, in the packaging bag P with a chuck | zipper of embodiment, you may arrange | position a 2nd zipper tape over the bag main body 50 across the left and right side seal parts 4, and in parallel with the 1st zipper tape T1. Note that the phrase “arranged in parallel” not only means that the second chuck tape is arranged in parallel with the first chuck tape T1, but also prevents the second chuck tape from intersecting the first chuck tape T1. It is a concept including an example arranged in

  Further, the weak fitting portion is not provided on the first chuck tape T1, and the fitting strength on the upper side of the first chuck tape T1 may be 20 to 45N, preferably 30 to 45N. In this case, the infant cannot remove the first chuck tape T1 from the upper side of the packaging bag P, but the adult can remove the first chuck tape T1 from the upper side of the packaging bag P. it can.

[Examples 1-3]
As the laminated film of the bag body, a film in which a PET film (thickness: 12 μm) was laminated as a base material layer La and LDPE (thickness: 30 μm) was laminated in this order as a heat seal layer Lb was used. As the first chuck tape, the one shown in FIG. 3 was used. Specifically, in the first chuck tape used for the packaging bags of Examples 1 to 3, the male tape member 10 has a base portion 11, a trunk portion 12, and a head portion 13 made of polypropylene (PP). The base portion 14 is made of a copolymer of linear low density polyethylene and polypropylene. In the female tape member 20, the first arm portion 22 and the second arm portion 23 are made of polypropylene (PP), and the second base portion 24 is made of a copolymer of linear low density polyethylene and polypropylene. It has been done.

  After forming the packaging bag shown in FIG. 1 using the first chuck tape, the front and back surfaces of the bag body corresponding to the location where the first chuck tape is attached are pressurized, and the male tape member The weak fitting portion was formed by deforming the head and the first and second arm portions of the female tape member into a flat shape. The weak fitting part was formed over the range of 3 mm in the width direction from the inner edge of the left side seal part to the right side seal part. And when 500g of granular agrochemicals were filled from the opening part of the 2nd gusset plan part, it was able to be filled, without the fitting of a 2nd chuck tape coming off. Then, the packaging bag P of the standing pouch form of Examples 1-3 was obtained by heat-sealing so that the part which the 2nd gusset plan part has opened may be closed. The height h of the bag body was 150 mm and the width W1 was 215 mm.

  Then, in the packaging bags of Examples 1 to 3, after the upper opening of the bag body is broken and removed from the planned opening portion of the bag body, it is evaluated whether or not the first chuck tape can be fitted. did. In the packaging bags of Examples 1 to 3, the infant picks the front surface on the upper side of the bag body from the first chuck tape and the back surface on the upper side from the first chuck tape of the bag body. The first chuck tape could not be disengaged from the upper side of the bag body even when the surface and the back surface were pulled apart. On the other hand, an adult inserts a finger from the upper side of the bag body into the weak fitting portion of the first chuck tape, and then slides the finger toward the right edge of the bag body to fit the first chuck tape. The contents could be removed.

  Next, test pieces having a height of 100 mm and a width of 50 mm were cut out from the packaging bags of Examples 1 to 3, and the fitting strength of the first chuck tape was evaluated. The fitting strength was measured using the measuring method described in Paragraph 0033, and RTC-1310A manufactured by Orientec Co., Ltd. was used as a Tensilon tensile tester. The evaluation results are as shown in Table 1. The unit of the values shown in Table 1 is N.

  The packaging bag of the present invention can be suitably used for a bag for storing things that are inconvenient for an infant, such as medicines, detergents, items that do not want to be tampered with, and is not limited to the above-described standing pouches. Pouches (three-side seal bags, four-side seal bags), side gusset bags, and any other packaging form can be used. The standing pouch may be composed of one or two films.

P packaging bag with chuck L film La substrate layer Lb sealant layer T1 first chuck tape 1 body film 2 bottom film 2a first surface 2b second surface 3 scheduled opening 4 side seal portion 5 easy opening means 6 Top seal portion 7 Bottom seal portion 10 Male tape member 11 First base portion 12 Trunk portion 13 Head portion 13a First locking step portion 13b Second locking step portion 14 Second base portion 20 Female tape member 21 First base portion 22 First arm portion 22a First locking claw portion 23 Second arm portion 23a Second locking claw portion 24 Second base portion 50 Bag body 71 First gusset portion 72 Second Machi scheduled part

Claims (2)

  A packaging bag with a chuck formed by a bag body having at least front and back surfaces, and a first chuck tape attached to the bottom side of the opening or the planned opening of the bag body, wherein the first chuck tape Is composed of a male tape member and a female tape member, the male tape member is attached to one of the front and back surfaces of the bag body, and the female tape member is attached to the other of the front and back surfaces of the bag body The first chuck tape has a high fitting strength on the top side and the bottom side, and a part of the first chuck tape is formed to be a weak fitting portion. Features a packaging bag with a chuck. A method of manufacturing a bag with a chuck provided with a first chuck tape having a high fitting strength on the upper side and the bottom side,
Preparing a packaging bag to which a first chuck tape is attached and an open edge other than the bottom is closed;
Forming a weak fitting portion on the first chuck tape;
After filling the contents from the open part of the bottom, heat sealing to close the open part of the bottom,
The manufacturing method of the bag with a chuck | zipper characterized by having this.

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