WO2004054887A1

WO2004054887A1 - Plastic zipper tape and bag provided with zipper tape

Info

Publication number: WO2004054887A1
Application number: PCT/JP2002/013153
Authority: WO
Inventors: Shingo Ishizaki
Original assignee: Ishizaki Shizai Co., Ltd.
Priority date: 2002-12-16
Filing date: 2002-12-16
Publication date: 2004-07-01
Also published as: AU2002354496A1

Abstract

A pair of plastic zipper tapes (10) having a protrusion (12) and a recess (13) formed to be fitted releasably on the side face at the base parts (11, 11) respectively. An easy-to-unseal film material (15) is welded to the base part (11) at a part below the protrusion (12) and the recess (13). The zipper tape (10) is welded to the inner side face of films (22, 22) constituting a bag (20) and the interior of the bag (20) is enclosed when the protrusion (12) and the recess (13) are fitted to each other. Since the easy-to-unseal film material (15) is provided at lower part of the base parts (11, 11), a sealed bag (20) can be confirmed and the bag (20) can be sealed again.

Description

Description: Plastic zipper tape and bag provided with the zipper tape

The present invention relates to a plastic zipper tape provided at an opening of a bag and a bag provided with the zipper tape. Background art

Conventionally, a bag 1 shown in FIG. 14 has been known as a plastic bag. This bag 1 is made by fusing or fusing a plastic film and made into a bag. Dfl portions 8a which can be fitted and released from each other are provided on opposing inner surfaces of a pair of flap portions 3, 3 located in the opening portion 2. A zipper tape 8 comprising a convex portion 8b is provided. Furthermore, a slider 9 for exclusive use of closing or opening and closing of the zipper tape 8 is attached to the opening 2 of the bag 1.

On the other hand, Japanese Unexamined Patent Publication No. Hei 7-132 946 discloses that the film on the front and back of the bag is placed under the zipper so that the volatile components contained in the bag do not adsorb to the zipper. However, there is disclosed a bag in which an opening and a storage section are partitioned.

The bag described in the above publication has the advantage that it can be confirmed that the bag has not been opened and that the bag can be resealed, but the bag film is easily opened. Storage capacity is sacrificed.

In the bag 1 shown in Fig. 14 and provided with a slider that can be used for both opening and closing, the middle leg piece for releasing the fitting of the uneven portions 8a and 8b of the zipper 8 is not used. There is a problem that it is difficult to seal the inside of the bag because it is inserted between the oil convex portions 8a and 8b. Disclosure of the invention

Therefore, an object of the present invention is to be able to confirm that the bag has not been opened and to reseal it. Even if a slider that can be opened and closed is used, the inside of the bag can be sealed, and the storage capacity of the bag can be reduced. It is an object of the present invention to provide a plastic zipper tape and a bag without sacrificing the zipper tape.

Another object of the present invention is to provide a difference in resistance between opening the bag opening portion from the opening side and opening the bag portion from the storage portion side, thereby making it difficult to open the bag from the storage portion side. To provide plastic zipper tapes and bags. .

In order to achieve the above object, a first invention is a pair of plastic zipper tapes each having a recess and a protrusion which can be fitted and released from each other on the side surface of the base portion. It is characterized in that the side surfaces and the lower portions of the concave portion and the convex portion are welded in an easily opened state.

According to a second aspect of the present invention, there is provided a pair of plastic zipper tapes each having a concave portion and a convex portion that can be fitted to and released from each other on a side surface of a base portion, wherein the concave portion and the convex portion are the pair of base portions. An easy-opening film material is welded to the lower part of the frame.

When the zipper tape according to the first and second inventions is used as a means for closing and opening the opening of the bag, the portion welded in the easily opened state or the easily opened film material is peeled off once. Since it does not re-adhere, it is easy to confirm that it has not been opened, and it is possible to re-seal with a zipper tape. <Also, the part welded in the easily opened state or the easily-openable film material is a zipper. Since it is provided on one tape, the storage capacity of the bag is not sacrificed. In addition, since the easily welded portion or the easy-opening film material is provided below the concave portion of the zipper tape, it may be necessary to attach a slider for opening and closing the uneven portion. Even if it is, it is possible to secure the tightness of the bag inside when unopened.

In addition, the fact that the portion welded in the easy-open state or the easy-open film material is provided under the uneven portion of the zipper tape means that the opening of the bag is opened when the bag is opened from the storage side. This means that opening from the storage section side, in other words, opening of the opening due to the internal pressure of the bag can be prevented as much as possible. Also, the stored items do not touch the zipper tape (especially the concave and convex parts) in the unopened state.

In the zipper tape according to the second invention, the easy-opening film material preferably has a three-layer structure in which a non-stretchable film is sandwiched between an easy-opening film and a welding film.

Further, the easy-opening film material is welded to the base portion in a discontinuous spot shape, and it is preferable that the welded shape has a wide bottom portion and a narrow upper portion. It is possible to peel off the easy-opening film material from the opening side with a relatively small force, but it is difficult to peel it off from the storage part side.

Further, at least one base portion may be bent toward the concave portion or the convex portion below the concave portion or the convex portion. The zipper tape having such a bent portion has a structure that is hard to open from the storage portion side. Also, if a dedicated slider is used to close the uneven part of the zipper tape, if the slider is provided with a locking part to the bent part, the slider will not be detached from the zipper tape. can do. Furthermore, since the bent portion of the base portion is close to or in close contact with the convex portion when the concave portion and the convex portion are fitted, even after the package is opened, the stored object is in the concave portion and the convex portion. The danger of contact with is reduced.

On the other hand, in the third invention, a pair of bags each having an opening formed on one side are formed on the inner surface of the opening, and recesses and projections which can be fitted and released from each other are formed on the inner surface of the opening. In a bag to which a plastic zipper tape is attached, a lower portion of the concave portion and the convex portion of the pair of base portions is welded in an easily opened state.

According to a fourth aspect of the present invention, there is provided a bag body in which one side is formed as an opening, and a pair of recesses and projections which can be fitted to and released from each other are formed on the inner surface of the opening. In a bag to which a plastic zipper tape is attached, an easy-opening film material is welded to the pair of base portions below the concave portion and the convex portion.

Since the plastic zipper tape according to the first or second invention is also used in the bags according to the third and fourth inventions, the same effects as those of the first and second inventions can be obtained. become. In particular, in the case of this bag, when the bag itself is held by hand, if a finger is hung on the bent portion of the base portion, the bent portion is convenient because it is non-slip.

In the bags according to the third and fourth inventions, at least one base portion of the zipper tape is bent to the concave side or the convex side below the four parts or the convex parts, and the opening part of the bag body is formed. It is preferable that the inner surface and the outer surface of the bent portion of the base portion are welded. The slider for closing and Z or opening and closing slides along the outer surface of the plastic base, so the inner surface is laminated with a heat-welded material, and the outer surface is a non-slip bag such as paper or cloth. However, the slider slides well. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 shows a bag provided with a zipper tape according to a first embodiment of the present invention. Showing a front view,

FIG. 2 is an explanatory view showing the welded state of the opening of the bag and the vicinity thereof, FIG. 3 shows the zipper tape, (A) is a cross-sectional view of a state in which the easy-opening film material is welded, ) Is a sectional view showing a state before welding, FIG. 4 is an explanatory view showing an example of a welded state of the easy-opening film material, and FIG. 5 is another example of a welded state of the easy-opening film material. FIG. 6 is a cross-sectional view showing a state in which the zipper tape is welded to the opening of the bag.

FIG. 7 shows a second embodiment of the zipper tape according to the present invention, in which (A) is a cross-sectional view showing a state in which an easily-opening film material is welded, and (B) is a cross-sectional view showing a state before welding. ,

FIG. 8 is a cross-sectional view showing a state in which a dedicated slider for closing is attached to the zipper tape,

FIG. 9 shows a slider exclusively used for the closing, (A) is a side view, (B) is a front view, (C) is a bottom view,

FIG. 10 is a cross-sectional view showing a state in which a slider for both opening and closing is attached to the zipper tape.

Fig. 11 shows the above-mentioned open / close slider, (A) is a front view, (B) is a left side view, (C) is a right side view, (D) is a GG sectional view,

FIG. 12 shows a third embodiment of the zipper tape according to the present invention, wherein (A) is a cross-sectional view showing a state where the zipper tape is welded in an easy-opening state, (B) is a cross-sectional view showing a state before welding,

FIG. 13 shows a fourth embodiment of the zipper tape according to the present invention, wherein (A) is a cross-sectional view showing a state where the zipper tape is welded in an easy-opening state, and (B) is a cross-sectional view showing a state before welding. ,

Figure 14 shows a bag with a conventional plastic zipper tape, (A) is a perspective view, and (B) is a sectional view of a main part. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of a plastic zipper tape and a bag provided with the zipper tape according to the present invention will be described with reference to the accompanying drawings. (1st Embodiment, see FIGS. 1 to 6)

FIG. 1 shows a bag 20 provided with a plastic zipper tape 10 according to the first embodiment. This bag 20 is manufactured by basically the same manufacturing process as the conventional plastic bag 1 shown in FIG. 14, and the zipper tape 10 is attached to the upper side opening 21. ing. In FIG. 1, the welded portions a and a of the side and lower sides during bag making are hatched.

As shown in FIG. 3, the zipper tape 10 has convex portions 12 and concave portions 13 that can be fitted and released from each other formed on the base portions 11 and 11, respectively. An easy-opening film material 15 is welded to the base portions 11 and 11 below the convex portion 12 and the concave portion 13. The zipper tape 10 is integrally molded by extrusion using a weldable plastic such as polypropylene or polyethylene.

The easily-openable film material 15 has a three-layer structure in which a non-stretchable film 15c is interposed between an easily-openable film 15a and a welding vinolem 15b. When the zipper tape 10 is formed of 100% polyethylene, the easily openable film 15a has 30 to 50% of polyethylene and 50 to 70% of polyamide. Can be used. Also, 100% polyethylene film can be used for the welding film 15b. In addition, non-stretchable film 15c has a stretched polypropylene For example, a pyrene inolem or a stretched polyethylene terephthalate film can be used. The non-stretchable film 15c is sandwiched to prevent the easily-openable film material 15 from being stretched during welding.

When the easy-opening film material 15 is welded to the base portion 11 of the zipper tape 10, it may be welded linearly in the longitudinal direction, but as shown by the symbol c in FIG. Welding in a continuous spot is preferred. The welded portion c has a shape with a wide bottom and a narrow top, as indicated by the diagonal lines. FIG. 5 shows another shape of the welded portion c. Here, it is welded in a substantially triangular shape.

By forming the welded portion c such that the bottom is wide and the top is narrow, it is easy to peel from the upper part (opening 21 of the bag 20) and peel from the lower part (storage part of the bag 20). It becomes difficult.

The zipper tape 10 is welded to the opening 21 of the bag 20 in the state shown in FIG. 3 (A). FIG. 6 shows the state at the time of welding. The upper welded parts d, d are inserted into the receiving plate 31 between the base parts 11 and 11, and the heat plates 32 and 32 are brought into contact with the base plate from outside and the base parts 11 and 1 The outer surface of 1 and the inner surface of the front and back films 22 and 22 of the bag 20 are welded. The lower welded portions e, e are made to contact the heat plate 33, 33 from the outside to the portion corresponding to the lower portion of the easy-open film material 15, and the inner and outer films 22, 22 are formed. The side surface and the outer surface of the base portion 11, 11, the inner surface of the base portion 11, 11 are welded to both sides of the easy-open film material 15. FIG. 2 shows hatched portions a, c, d, and e formed in an overlapping manner at the opening 21 of the bag 20 with hatching. In this case, the upper portion of the easy-peel welded portion c of the easily-openable film material 15 protrudes above the welded portion e of the bag 20 with the front and back films 22, 22. When opening bag 20, welded part c The upper end of the mark becomes the peeling point, and it can be peeled lightly.

The opening 21 of the bag 20 is provided with a slider 50 or 60 dedicated to closing or opening and closing. This type of slider will be described in a second embodiment described below.

The zipper tape 10 and the bag 20 configured as described above have the following functions and effects. The easily-openable film material 15 does not re-adhere once peeled off, so it is easy to confirm that it has not been opened, and it is possible to re-seal it with a zipper tape 10. Further, since the easily-openable film material 15 is provided on the zipper tape 10, the storage capacity of the bag 20 is not sacrificed.

Furthermore, in the bag making process, bags 20 can be easily manufactured using conventional bag making equipment as it is. In other words, in the ordinary bag making equipment for bags with a zipper, the receiving plate is inserted into the portion provided with the easily-openable film material 15, but this receiving plate is inserted when the bag 20 is made. Just remove it. -Since the easy-opening film material 15 is provided below the bottom 12 and the bottom 13 of the zipper tape 10, the opening 21 of the bag 20 is opened from the storage side. When the opening 21 is opened from the storage portion side, in other words, the opening 21 is prevented from being opened by the internal pressure of the bag 20 as much as possible. Further, the stored items do not touch the zipper tape 10 (especially, the convex portions 12 and the concave portions 13) in an unopened state.

In addition, the easily-openable film material 15 is welded to the base portion 11 of the zipper tape 10 in a discontinuous spot shape. The welded shape has a wide bottom portion and a narrow upper portion, so that the opening portion 21 is formed. It is possible to peel off the easily openable film material 15 from the side with a relatively small force, but it is difficult to peel off from the storage part side. (See the second embodiment, FIGS. 7 to 11)

FIG. 7 shows a plastic zipper tape 40 according to a second embodiment. The zipper tape 40 is also attached to a bag 20 similar to that shown in FIG.

The zipper tape 40 has, similarly to the zipper tape 10, a convex portion 42 and a concave portion 43 that can be fitted and released from each other are formed on the base portions 41, 41, respectively. The base portions 41 and 41 are bent below the convex portion 42 and the concave portion 43 toward the convex portion 42 and the concave portion 43.

Further, the zipper tape 40 has an easily-openable film material 15 welded between the bent portions 41a, 41a of the base portions 41, 41. The configuration and the welded state of the easily-openable film material 15 are as shown in FIGS. 4 and 5.

As shown in FIG. 8, the inner surface of the opening 21 of the bag 20 and the outer surface of the bent portion 41a are welded to the zipper tape 40 as shown in FIG. That is, the zipper tape 40 is attached with the upper portions 41b, 41b of the base portions 41, 41 protruding upward from the opening 21 of the bag 20 to be exposed. 1b constitutes the flap portion of the bag 20.

For example, a slider 50 dedicated to closing is attached to the flap portion (base portions 41, 41). As shown in FIGS. 8 and 9, the slider 50 dedicated to closing includes a pair of side leg pieces 51, 51 located outside the base portions 41, 41 and a base portion 41, as shown in FIGS. , 41 and a middle leg piece 55 having a length that cannot reach the convex part 42 and the concave part 43.

The slider 50 is attached to the zipper tape 40 in the state shown in FIG. 8, and is slid in either direction along the zipper tape 40 so that the side leg pieces 51, 51 are attached. The projections 52, 52 formed inside the zipper tape 40 press the projections 42 and the depressions 43 of the zipper tape 40 together to fit. Let The projections 53, 53 formed on the lower ends of the side leg pieces 51, 51 engage with the steps of the bent portions 41a, 41a of the base portions 41, 41, and the slider 50 moves upward. It is prevented from coming off.

To open the bag 20, slide the slider 50 to one end of the bag 20, grasp the top 4 lb, 41 b of the zipper tape 40 by hand and pull it to both sides. (See arrows C and C in Fig. 7 (A)) to forcibly release the 2 part 42 and the concave part 43.

The effect of the zipper tape 40 is basically the same as that of the zipper tape 10. In addition, in the bag 20 provided with the zipper tape 40, the base portion 41 of the zipper tape 40 is provided. , 41 are bent inward, so that the protrusions 53, 53 of the slider 50 are locked to the bent portions 41a, 41a, so that the slider 50 cannot be disengaged upward. Is prevented.

On the other hand, since the slider 50 slides along the outer surface of the plastic base portions 41 and 41, the bag 20 is laminated with a heat-welded material on the inner surface and the outer surface is made of paper or cloth. The slider 50 slides well even when the bag is made of a material with poor slip.

Further, when holding the bag 20 by hand, if a finger is placed on the bent portions 41a, 41a of the base portions 41, 41, the bent portions 41a, 41a are slipped. It is convenient as it stops. Further, since the film constituting the bag 20 does not exist on the rear side of the convex portion 42 and the concave portion 43, the pinching strength of the slider 50 is optimized without being affected by the thickness of the film. Can be set to state.

FIG. 10 shows a state in which an openable / closable slider 60 is attached to the zipper tape 40. As shown in Fig. 11, the open / close slider 60 is composed of a pair of side leg pieces 61, 61 and a middle leg piece 65. The middle leg piece 65 has a groove 66 into which the convex portion 42 and the concave portion 43 of the zipper tape 40 are respectively fitted, and a bulging portion is formed at the upper and lower edges of the groove 26. 67 and 68 are formed, and a notch 69 is formed adjacent to the groove 66. A bulged portion 62 facing the notch 69 is provided inside the side leg pieces 61, 61.

When the slider 60 is slid in the "closed" direction, the convex portion 42 and the concave portion 43 of the zipper tape 40 are pressed by the bulging portions 62, 62 and enter the notches 69. , Fit each other. As a result, the zipper tape 40 is closed. On the other hand, when the slider 60 is slid in the “closed” direction, the concave portion 42 and the convex portion 43 are forcibly separated by the middle leg piece 65. That is, the zipper tape 40 is released.

With the conventional zipper tape, when the openable / closable slider 60 is attached, air flows into and out of the bag 20 through the groove 66 because the middle leg piece 65 is inserted between the uneven portions. Had problems. However, in the zipper tape 40, since the easy-opening film material 15 is provided below the protrusions 42 and the recesses 43, even when the openable / closable slider 60 is attached. However, in the unopened state, it is possible to ensure the tightness of the storage portion of the bag 20. In the initial opening, the zipper tape 40 is opened with the slider 60, and the easy-opening film material 15 is peeled off by pinching the opening 21 of the bag 20 with a finger.

(Refer to the third embodiment, Fig. 12)

FIG. 12 shows a plastic zipper tape 10 according to a third embodiment. This zipper tape 10 has basically the same structure as the zipper tape 10 shown in FIG. 3, and is provided on the lower inner surface of one base portion 11 in place of the easy-open film material 15. The easily-openable plastic material is extruded together with the base portion 11 and integrated to form an easily-openable layer 16. It is a digit.

The easy-open layer 16 is welded to the inner surface of the other base portion 11 in an easy-open state. As the material of the easily-openable layer 16, for example, if the base portion 11 is 100% of polyethylene, a mixed material of 40% of polyethylene and 60% of polyimide is used.

(Refer to the fourth embodiment, Fig. 13)

FIG. 13 shows a plastic zipper tape 40 according to a fourth embodiment. This zipper tape 40 has basically the same configuration as the zipper tape 40 shown in FIG. 7, and replaces the easy-opening film material 45 with the lower portion of one base portion 41. An easy-opening layer 46 is provided by extruding an easy-opening plastic material together with the base portion 41 on the side surface and integrating them.

The easy-open layer 46 is welded to the inner surface of the other base portion 41 in an easy-open state. As the material of the easy-opening layer 46, the same material as described in the third embodiment is used.

(Other embodiments)

The plastic zipper tape and the bag according to the present invention are not limited to the above embodiment, but can be variously modified within the scope of the gist.

For example, the zipper tapes 10 and 40 may be provided at the convex portions 12 and 42 and the concave portions 13 and 43 so as to ensure airtightness. Further, as the material of the zipper tapes 10 and 40 and the material of each film of the easily-openable film material 15, various materials other than those described in the above embodiment can be used. Industrial applicability As described above, the plastic zipper tape and the bag provided with the zipper tape according to the present invention can be confirmed to be unopened, can be resealable, and sacrifice the storage capacity of the bag. It is ideal for bags that store goods in a state where they are kept almost airtight.

Claims

range of request

1. A pair of plastic zipper tapes with concave and convex portions that can be fitted and released from each other formed on the side surface of the base portion.

(5) The inner surfaces of the pair of base portions and the lower portions of the concave portion and the convex portion are welded in an easily opened state,

A zipper tape made of plastic.

2. At least one base portion is bent below the concave portion or convex portion toward the concave portion 0 or convex portion side, and the inner surface of the bent portion is welded in an easily opened state. 2. The plastic zipper tape according to claim 1, wherein:

3. A pair of plastic zipper tapes each having a recess and a protrusion that can be fitted and released from each other on the 5 side surfaces of the base portion.

'An easy-opening film material is welded under the concave and convex portions of the pair of base portions,

A zipper tape made of plastic. 0

4. The easy-opening film material has a three-layer structure in which a non-stretchable film is sandwiched between an easy-opening film and a welding film. Item 4. A plastic zipper tape according to Item 3.

5. The plastic zipper tape according to claim 3, wherein the easy-opening film material is welded to the base portion in a discontinuous spot 5 shape.

6. The plastic zipper tape according to claim 5, wherein the welding shape of the easy-opening film material has a wide bottom portion and a narrow top portion.

7. At least one of the base portions is bent toward the convex portion or the convex portion below the concave portion or the convex portion, and the easy-opening film material is welded to the inner surface of the bent portion. The plastic zipper tape according to claim 3, characterized in that:

8. —A pair of plastic zipper tapes in which a bag is formed with an opening on each side, and concave and convex portions that can be fitted and released with each other are formed on the base portion on the inner surface of the opening. In the bag to which is attached, the lower portions of the concave portions and the convex portions of the pair of base portions are welded in an easily opened state,

Characterized by a bag.

9. At least one base portion is bent to the concave side or the convex side below the 囬 portion or the convex portion, and the inner surface of the bent portion is welded in an easily opened state,

The inner surface of the tip portion and the outer surface of the bent portion of the base portion of the opening of the bag body are welded;

9. The bag according to claim 8, wherein:

10. A pair of plastic zippers in which a bag is formed with one side being an opening, and a 囬 and a projection which can be fitted and released from each other are formed on the inner surface of the opening in the base portion, respectively. In a bag with tape attached hand,

An easy-open film material is welded below the concave and convex portions of the pair of base portions,

Characterized by a bag.

11. At least one base portion is bent below the concave portion or convex portion toward the concave portion or convex portion, and the easy-opening film material is welded to the inner surface of the bent portion.

The inner surface of the distal end portion of the opening of the bag and the outer surface of the bent portion of the base portion are welded,

The bag according to claim 10, wherein:

12. The bag according to claim 10, wherein a slider for fitting and releasing the concave portion and the convex portion is provided on a base portion of the pair of zipper tapes.