CN102869281A

CN102869281A - Zipper tape and package bag with zipper tape

Info

Publication number: CN102869281A
Application number: CN2011800108171A
Authority: CN
Inventors: 后藤修一
Original assignee: Idemitsu Unitech Co Ltd
Current assignee: Idemitsu Unitech Co Ltd
Priority date: 2010-02-26
Filing date: 2011-01-28
Publication date: 2013-01-09
Also published as: WO2011105168A1; KR20120138749A; US20120321225A1; JP5457884B2; JP2011177215A; EP2540187A1

Abstract

The head (212) of the male member (21) and the groove (222) of the female member (22) engage with each other in an engageable and disengageable manner to generate a containing space (16) inside the bag body (10). On the inner surface of the groove (222), there are provided fusion layers (24) which fusion-bond the outer surface of the head (212) and the inner surface of the groove (222) opposing each other, when a food product is sterilized with heat to be stored long. By selecting the material of the fusion layers (24) and setting the dimensions of the areas for the fusion layers (24), the fusion layers (24) can be provided with a peel strength which never inconveniently requires a strong force to be unsealed, thereby providing a satisfactory feeling of unsealing. The fusion layers (24) provide airtightness, so that inconvenience such as the leakage of the food product can be prevented even if the pressure within the containing space (16) is increased in the sterilization with heat.

Description

Zipper tape reaches the packaging bag with zipper tape

Technical field

The present invention relates to a kind of zipper tape and have the packaging bag with zipper tape of this zipper tape.

Background technology

In the past, knownly a kind ofly be bonded with the packaging bag with zipper tape (below sometimes referred to as " packaging bag ") of zipper tape at the bag inner surface.In the situation that with powder or liquid as content-filled in this packaging bag, occur sometimes that content can be in carrying the way makes progress from buckle that sealed sides spills or extraneous air enters in the bag and makes the unfavorable conditions such as content goes bad.

Therefore, known have a kind of zipper tape and with the packaging bag of zipper tape, and it spills, utilizes the blocking-up extraneous air to keep the quality etc. of content in order to prevent content, and has the structure (for example, with reference to patent documentation 1～3) that the air-tightness of making improves.

What patent documentation 1 was put down in writing is that the length direction along zipper tape on the opposite face of male parts and female part interlock is provided with the soft rubber liner.And adopt such structure: when male parts and female part interlock, between the opposite face of interlock, carry out crimping and produce strain, close contact on opposite face and can obtain air-tightness.

What patent documentation 2 was put down in writing is, the length direction along zipper tape on the interior end of the concavity projection of female part is provided with elastic adhesive spare continuously.And adopt such structure: when the convex projection of male parts and the interlock of concavity projection, the elastic adhesive spare of concavity projection is by the pushing of the head of convex projection, utilize elastic adhesive spare elastic force and with the head close contact of convex projection, can obtain air-tightness.

What patent documentation 3 was put down in writing is, be provided with on the surface of positive side projecture part with the formation such as polybutene, ethylene-vinyl acetate copolymer, ethene polypropylene miser easily peel off plastic layer, under interlocking pattern, give air-tightness by easily peeling off plastic layer.Adopt in addition such structure: in when Kaifeng, easily peel off plastic layer and carry out that polymerization is peeled off, interface peel.

Patent documentation 1: Japanese kokai publication hei 6-239356 communique

Patent documentation 2: TOHKEMY 2006-102068 communique

Patent documentation 3: the international 02/38459 trumpeter's volume that discloses

Yet, as the content with the packaging bag of zipper tape, sometimes filling is carried out boiling and is processed, boils the food of the heat treated such as processing or sometimes filling and carry out the medicine of heat treated, medical product, cosmetics, chemicals and groceries etc. with the purpose such as sterilization with the purpose such as sterilization.

In this case, for example in patent documentation 1,2 such packaging bags with zipper tape with elastomeric element, might when heating material, easily produce thermal deformation by elastomeric element, in the gap of occlusion portion generation with elastomeric element, can't obtain air-tightness.In addition, owing to using elastomeric element, therefore also might when heat treated, produce foul smell by elastomeric element, bring sense of discomfort to the user.In addition, in patent documentation 2, because elastomeric element contains bonding additives, therefore also might when open packing bag, adhere to content by the elastomeric element at zipper tape.

On the other hand, in patent documentation 3 such being provided with in the structure of easily peeling off plastic layer that engages, if the bond strength of the interior pressure when making the ability heat treated then might need larger power, the infringement property that breaks a seal in when Kaifeng in the time will easily peeling off plastic layer and peel off.In addition, because the plastic layer of easily peeling off that will engage is installed in the packaging bag that forms on the bag with zipper tape, therefore, after also can being created in during the filling content, carry out filling etc. from the bottom side of bag placement method is produced restriction, can't improve the unfavorable condition of versatility.

Summary of the invention

In view of the above problems, the object of the invention is to, even a kind of heat treated of carrying out is provided, can not produce yet air-tightness, Kaifeng property aspect unfavorable condition zipper tape and with the packaging bag of zipper tape.

Zipper tape of the present invention, have a pair of male parts and the female part that can engage, disengageably engage, be provided in and take on the bag that is contained parts that is implemented heat treated, in this zipper tape, at least either party in described male parts and described female part has the welding layer, this welding layer makes the occlusal contact condition face welding of described male parts and described female part heat treated is described when being contained parts.

In the present invention, preferably, the fusing point of described welding layer be 60 ° of C above, 150 ° below the C.

The zipper tape of the present invention's record, have a pair of male parts and the female part that can engage, disengageably engage, in this zipper tape, at least either party in described male parts and described female part has the welding layer, low and fusing point consists of, and can make the occlusal contact condition face welding of described male parts and described female part at 60 ° more than the C, 150 ° of resins below the C this welding layer than the fusing point of described male parts and described female part by fusing point.

In the present invention, preferably, described welding layer by in ethylene-vinyl acetate copolymer resin, the metallocene linear low density polyethylene any forms at least.

And in the present invention, preferably, described welding layer is arranged to wire and is the state that contacts with the bonding upper thread of described interlock along the zipper tape length direction.

In addition, in the present invention, preferably, described welding layer is arranged to membranaceous and is along the state of zipper tape length direction and the bonding plane-plane contact of described interlock.

The packaging bag with zipper tape that the present invention puts down in writing, it has bag and is installed in claim 1 each described zipper tape to the claim 6 on this bag.

The invention effect:

Adopt the present invention, because the occlusal contact condition face of male parts and female part carries out welding by the welding layer when heat treated, therefore, the occlusion portion of male parts and female part can not produce the gap, can obtain air-tightness.In addition, owing to when Kaifeng, the welding layer is just peeled off and can be broken a seal, therefore, such as also selecting to set peel strength or set peel strength etc. by the setting of the area that the welding layer is set by the material of welding layer, as long as set the peel strength of the Kaifeng sense of this unfavorable condition of power that need to be larger in the time of can not being created in Kaifeng for, the air-tightness when can not damage Kaifeng sense ground raising heat treated.In addition, by the material of suitable selection welding layer, also can prevent from bringing to the user because of the distinctive foul smell of elastomeric element the unfavorable condition of sense of discomfort.

Description of drawings

Fig. 1 is the front view with the packaging bag of zipper tape of expression one embodiment of the present invention.

Fig. 2 is the cutaway view along II-II line among Fig. 1.

Fig. 3 is the cutaway view after the zipper tape part nearby with the packaging bag of zipper tape of expression another embodiment of the present invention is dissectd.

Fig. 4 is the cutaway view after the zipper tape part nearby with the packaging bag of zipper tape of expression another embodiment of the invention is dissectd.

Fig. 5 is the cutaway view after the zipper tape part nearby with the packaging bag of zipper tape of expression another embodiment of the invention is dissectd.

Fig. 6 is the cutaway view after the part with the packaging bag of zipper tape of expression another embodiment of the invention is dissectd.

Fig. 7 is the cutaway view with the packaging bag of zipper tape of expression another embodiment of the invention.

Symbol description:

1,43,52 ... packaging bag with zipper tape

10 ... bag

20,42,51 ... zipper tape

21 ... male parts

22 ... female part

24 ... the welding layer

The specific embodiment

Below, an embodiment of the packaging bag with zipper tape of the present invention is described with reference to the accompanying drawings.

In the present embodiment, as the packaging bag (being designated hereinafter simply as " packaging bag ") with zipper tape, illustration process, boil the pasteurizations (heat treated) such as processing to carrying out boiling food carry out wrapping packaging bag, but also applicable to the packaging bag that is contained parts of taking in the medicine that carries out equally pasteurization (heat treated), medical product, cosmetics, chemicals or groceries etc.

The structure of packaging bag:

The food that the conduct that is heated sterilization for long preservation such as cooking food etc. is contained parts is enclosed in the packaging bag 1 of present embodiment.As the food of taking in, except the food of having cooked and having heated for long preservation, also comprise food materials before the cooking etc., can take any forms such as solid or liquid as object.This packaging bag 1 has bag 10 as shown in Figure 1, and this bag 10 so forms: will overlap as the base film 11 of packaging material, and reach sealing base portion 14 at its periphery formation side seal base portion 12, lower seal base portion 13.

And, as shown in Figures 1 and 2, at the inner surface 10A of the peristome 15 of bag 10 zipper tape 20 with a pair of male parts 21 and female part 22 is installed.The side seal base portion 12 of this zipper tape 20 from a side side seal base portion 12 to the opposing party is sealed on the bag 10 bandedly.In addition, the bite that engages, throws off 23 of zipper tape 20 forms accommodation space 16 at the interior separation of packaging bag 1.

This packaging bag 1 for example take in not shown food below bag 10 after, forms lower seal base portion 13 by the bottom at bag 10 and makes closed state.

In addition, the user is in when Kaifeng, the upper sealing base portion 14 that is located at peristome 15 sides is cut away and breaks a seal, and seals with zipper tape 20 again.

In addition, zipper tape 20 has as mentioned above: the male parts 21 of a side's who is formed by thermoplastic resin band shape; And with the opposing party's of this male parts 21 interlocks female part 22.

Here, male parts 21 by be sealed in the banded base portion 211 of positive side, cross section on the bag 10 be roughly sagittate head 212 and should the banded base portion 211 of sun side and the connecting portion 213 that couples together of head 212 form as one.

In addition, female part 22 is identical with male parts 21, has: be sealed in the banded base portion 221 of cloudy side on the bag 10; And be connected with the banded base portion 221 of this moon side and the cross section that forms is circular-arc concave part 222.This concave part 222 can engage, throw off the head 212 of male parts 21, by consisting of bite 23 with head 212.By interlock or the disengaging of these concave parts 222 and head 212, packaging bag 1 is closed or breaks a seal.

Here, the male parts 21 of the formation zipper tape 20 of present embodiment can utilize the co-extrusion modling method and head 212 and connecting portion 213 that integrated acquisition links to each other with the banded base portion 211 of positive side.Equally, female part 22 also can utilize the co-extrusion modling method and concave part 222 that integrated acquisition links to each other with the banded base portion 221 of cloudy side.If utilize this co-extrusion modling method moulding zipper tape 20, then manufacturing process can be oversimplified, can reduce manufacturing cost, can make continuously and stably zipper tape 20.

The male parts 21 of this zipper tape 20 and female part 22 can be made of polyethylene, polypropylene, preferably are made of the high polypropylene of heat resistance.Specifically, can use the thermoplastic resins such as HOPP, block polypropylene (being designated hereinafter simply as " BPP "), random polypropylene (being designated hereinafter simply as " RPP "), propylene-ethylene-butene 1 random terpolymer, the special soft resin of polyolefin (being designated hereinafter simply as " TPO " resin, such as Co., Ltd.'s original polymer TPO processed) or mix the mixture that these resins form.

In addition, as the resin that consists of zipper tape 20, in the situation that use RPP, the melt flow rate of this RPP (being designated hereinafter simply as MFR) preferably 0.5～20g/10 minute is more preferably 1～15g/10 minute.

If the MFR of random polypropylene is less than 0.5g/10 minute, then link to each other with the banded base portion 211 of positive side and the banded base portion 221 of cloudy side and the extrusion molding of shape all-in-one-piece bite 23 variation sometimes.On the other hand, if MFR greater than 20g/10 minute, then because the easy connecting portion 213 closed or male parts 21 in the top of the concave part 222 of female part 22 easily falls down, therefore, is difficult to be extruded as the shape of the regulation that can open and close again sometimes.

In addition, the inner surface at the concave part 222 of female part 22 is provided with welding layer 24.Heat when this welding layer 24 utilizes the food of taking in carried out pasteurization and melting, making interlock and occlusal contact condition face relative to each other is the inner surface welding of outer surface and the concave part 222 of head 212.

As this welding layer 24, using fusing point is that 60 ° of C are above, 150 ° of resins that C is following.That is, about example 60～100 ° of C of temperature when boiling sterilization or the 100 ° of 150 ° of resins that produce meltings below the C more than the C of temperature when having used the pasteurization of cooking food of micro-wave oven.Specifically, use a certain at least in ethylene-vinyl acetate copolymer (being designated hereinafter simply as " EVA "), the metallocene linear low density polyethylene (being designated hereinafter simply as " metallocene LL ").

Here, if the fusing point of welding layer 24 is lower than 60 ° of C, the unfavorable condition that the welding layer 24 that then might produce melting spills in the bite 23.On the other hand, if the fusing point of welding layer 24 is higher than 150 ° of C, then welding layer 24 can melting when the heating of food sterilization.Namely, welding layer 24 can not utilize the heat generation melting of pasteurization and make the occlusal contact condition face melting of head 212 and concave part 222, can not improve closure, might produce such as the interior pressure that increases owing to the heat because of pasteurization occur food from the head 212 and concave part 222 between the unfavorable condition such as spill.Therefore, welding layer 24 use fusing point are that 60 ° of C are above, 150 ° of materials that C is following.

And, welding layer 24 wire ground, namely be provided with many, for example three along the length direction from a side side seal base portion 12 to the zipper tape 20 of the opposing party's side seal base portion 12, and be arranged to carry out the state that line contacts along the belt length direction of occlusal contact condition face.

Be sealed on the base film 11 that forms bag 10 by the zipper tape 20 that makes this structure, this base film 11 is carried out bag, thereby can obtain packaging bag 1 as shown in Figure 1.When this zipper tape 20 is sealed on the base film 11, the heat (radiant heat) of welding layer 24 when for example using the welding of seal bar produces melting, and the head 212 of male parts 21 utilizes welding layer 24 and welding with the occlusal contact condition face of the concave part 222 of female part 22.

Here, packaging material as formation bag 10 are base film 11, its best example is layered in laminate film on the not shown substrate layer as constituting with sealing material layer, but also can be according to desired performance, constitute the laminated thin rete that between substrate layer and sealing material layer stacked not shown inner liner, light shield layer, intensity as the intermediate layer improves layer etc. and use.In addition, the fusing point of this base film 11 is higher than the fusing point of welding layer 24, specifically, is formed by the resin that melting does not occur when the pasteurization.As this resin, be not limited to a kind of resin, can use the mixture that mixed various resins and formed, copolymer etc.

For substrate layer, except bidirectional stretching polypropylene film (being designated hereinafter simply as " OPP film "), can use the biaxially oriented polyester film such as biaxial tension pet film (being designated hereinafter simply as " PET film "), biaxial tension PEN film suitablely or suitable use the two-way stretching polyamide films such as nylon 6, nylon 66, MXD6 (poly-oxalyl m-xylene diamine) etc., also can use as required various engineering plastics films.In addition, these can use separately, perhaps also can use a plurality of combinations are stacked.

Make inner liner in the situation that the intermediate layer established, the film layer of the evaporation layers such as aluminium foil or silica, aluminium oxide, aluminium, PVDC also can be used in the intermediate layer except the films such as vinyl-vinyl-acetic ester copolymer saponated material (being designated hereinafter simply as " EVOH "), polyacrylonitrile (being designated hereinafter simply as " PAN ").

In addition, in the situation of the film layer of the evaporation layer that uses silica, aluminium oxide, aluminium etc. or PVDC, also can carry out evaporation or coating at the bag 10 inner surface 10A of substrate layer and form.In addition, can also carry out evaporation or coating to other BON biaxially oriented nylon film (being designated hereinafter simply as the ONy film), PET film, OPP film etc. and form, and can be with this pellicular cascade on the intermediate layer.

In the middle of them, therefore aluminium foil and aluminium-vapour deposition layer can also double as light shield layer owing to being opaque.

Stacked for the film in substrate layer and intermediate layer can be used known dry type layered manner or be extruded layered manner (Sandwich layered manner).

For the confining bed of innermost layer, can use polypropylene (being designated hereinafter simply as CPP) etc.

In addition, sealing material layer stacked also can make above-mentioned resin film-form, with the dry type layered manner or extrude layered manner and carry out stackedly, in addition, also described resin can be pushed, coating and stacked.

In addition, the packaging bag 1 of present embodiment is such as the easily manufacturings such as three side sealing bag machines that can use with zipper tape.

In addition, the air-proof condition in this situation (temperature, pressure etc.) can suitably determine according to the resin kind etc. that consists of zipper tape 20 and form the base film 11 of bag 10.

The Kaifeng of packaging bag, sealing action:

At first, for long preservation is accommodated in the food of packaging bag 1 pasteurization is carried out in packaging bag 1.

Utilize this pasteurization, welding layer 24 produces meltings, makes the relative occlusal contact condition face welding of head 212 and the concave part 222 of female part 22 of the male parts 21 of interlock.

And the user cuts away upper sealing base portion 14, and makes peristome 15 openings, the food behind the taking-up pasteurization.

In addition, in order to store preservation food, seal again in the situation that a part of food stayed in the packaging bag 1, make the again interlock and peristome 15 is sealed of head 212 and concave part 222.

Here, by welding layer when the pasteurization 24 meltings occuring, thereby improves keying strength and the air-tightness of head 212 and concave part 222.Therefore, even the interior pressure of accommodation space 16 increases because of pasteurization, can not occur yet such as food from the head 212 and concave part 222 between the unfavorable condition such as spill.

In addition, use EVA, metallocene LL as welding layer 24, thus, produce the unfavorable condition of in the past such distinctive foul smell of elastomeric element and so in the time of also can pasteurization occuring.Therefore, also can prevent from bringing sense of discomfort to the user.

And, by the edge, Kaifeng of catching peristome 15 peristome 15 is expanded, thus, be stripped from and remove interlock by the head 212 of welding layer 24 welding and concave part 222, peristome 15 is by opening.Under this state, can take out inner food.

The action effect of embodiment:

Adopt present embodiment, obtain following such action effect.

Namely, in the above-described embodiment, in the head 212 of the male parts 21 that can engage, disengageably engages and the concave part 222 of female part 22, inner surface at concave part 222 is provided with welding layer 24, this welding layer 24 is when carrying out pasteurization for long-life food prod, and the occlusal contact condition face that makes relative head 212 is that the occlusal contact condition face of outer surface and concave part 222 is the inner surface welding.

So, by pasteurization, the head 212 that makes male parts 21 utilizes welding layer 24 and welding with the occlusal contact condition face of the concave part 222 of female part 22, therefore, occlusion portion at the head 212 of male parts 21 and the concave part 222 of female part 22 can not produce the gap, obtains air-tightness.In addition, owing to when Kaifeng, can break a seal by peeling off welding layer 24, therefore, such as also selecting to set peel strength or set peel strength etc. by the area that welding layer 24 is set by the material of welding layer 24, need peel strength larger this unfavorable condition of power, that can obtain the good sense that breaks a seal in the time of can not being created in Kaifeng as long as set for, the sealing in the time of can not damaging Kaifeng sense ground raising heat treated.That is, utilize the method that welding layer 24 is set, can easily adjust peel strength, sense and bubble-tight structure can easily obtain well to be broken a seal.

And in the present embodiment, in the structure of taking in the food that is heated sterilization for long preservation, being provided with fusing point is that 60 ° of C are above, 150 ° of welding layers 24 that C is following.

Therefore, can by boil process or boiling processing etc. carry out heat treated when being pasteurization temperature and suitably make 24 melting of welding layer, make the occlusal contact condition face welding of head 212 and concave part 222.So, can prevent food from the head 212 and concave part 222 between the gap unfavorable condition such as spill.

In addition, in the present embodiment, as welding layer 24, use EVA or metallocene LL.

Therefore, when pasteurization, can prevent that also the distinctive foul smell of elastomeric element brings sense of discomfort to the user

In addition, in the present embodiment, welding layer 24 is provided with three at the occlusal contact condition face of head 212 and concave part 222.

Therefore, compare with the situation that is provided with, can obtain the closed state higher than the outside of accommodation space 16, and, compare with the situation of carrying out welding in the whole zone of inner surface of the outer surface of head 212 and concave part 222, even less material also can obtain sufficient closed state.In addition, compare with the situation in whole regional welding, in the time can making Kaifeng, open the power of peristome 15 and dwindle, the sense of more brisk good Kaifeng can be provided.

In addition, in the present embodiment, be provided with welding layer 24 in concave part 222 sides.

Therefore, even for example food is aqueous, also be difficult to contact with welding layer 24, can prevent from bringing the unfavorable condition of sense of discomfort to the user.

Variation:

In addition, the present invention is not limited to above-mentioned embodiment, and the change in the scope that can realize the object of the invention, improvement etc. are included among the present invention.

Be illustrated although be provided with three welding layers 24, for example shown in Figure 3ly also can only arrange one or arrange as shown in Figure 4 two.

In addition, as shown in Figure 4, welding layer 24 is not limited to be located at the position at head 212 tops, also can be located at the two side portions on the length direction of head 212.

In addition, as shown in Figure 5, also welding layer 24 can be set to be and spread all over whole zone roughly and the mutual relative face of coating head 212 and concave part 222 membranaceously.Adopt this structure shown in Figure 5, can obtain higher closure.

In addition, although welding layer 24 is located at concave part 222 sides, also can be located at the outer surface of head 212, or be located at respectively on the both sides of head 212 and concave part 222.

In addition, in the situation that be located on the both sides, the welding layer 24 that is set to head 212 sides and the welding layer 24 of concave part 222 sides are in not relatively different positions, but just obtaining efficiently on the high closeness this point with less material, comparatively preferred.

In addition, for example as shown in Figure 6, also can make the packaging bag 43 with zipper tape that is provided with cutting belt 41 and is provided with zipper tape 42 in side's base film 11 sides of bag 10.In addition, also can make as shown in Figure 6 zipper tape 42 like that, be provided with the structure of many (for example two)

bite

23A, 23B.

This zipper tape shown in Figure 6 42 is provided with welding layer 24 at the bite 23A of accommodation space 16 sides.In addition, also can welding layer 24 be set at the bite 23B of peristome 15 sides or on both sides'

bite

23A, 23B, welding layer 24 be set respectively.

And, by the bite 23A in accommodation space shown in Figure 6 16 sides welding layer 24 is set, can obtain high closure with less material thus.

In addition, for example as shown in Figure 7, also can make such structure: the sealing on the base film 11 that is installed in bag 10 as the banded base portion 211 of positive side and the banded base portion 221 of cloudy side of bite 23A, the 23B that will be provided with many (for example two), be arranged in the open side of bag 10 on two sides of the banded base portion 211 of positive side and the banded base portion 221 of cloudy side, on accommodation space 16 sides only are arranged on a side in the banded base portion 211 of positive side or the banded base portion 221 of cloudy side.

Adopt this structure shown in Figure 7, can obtain higher closure.

Utilize possibility on the industry:

The present invention be applicable to such as in filling with purposes such as sterilizations and carry out the zipper tape that the bag of the food, pharmaceuticals etc. of heat treated arranges.

Claims

1. a zipper tape has a pair of male parts and the female part that can engage, disengageably engage, and is provided in to take on the bag that is contained parts that is implemented heat treated, and this zipper tape is characterised in that,

At least either party in described male parts and described female part has the welding layer, and this welding layer makes the occlusal contact condition face welding of described male parts and described female part heat treated is described when being contained parts.

2. zipper tape as claimed in claim 1 is characterized in that, the fusing point of described welding layer be 60 ° of C above, 150 ° below the C.

3. a zipper tape has a pair of male parts and the female part that can engage, disengageably engage, and this zipper tape is characterised in that,

At least either party in described male parts and described female part has the welding layer, low and fusing point consists of, and can make the occlusal contact condition face welding of described male parts and described female part at 60 ° more than the C, 150 ° of resins below the C this welding layer than the fusing point of described male parts and described female part by fusing point.

4. zipper tape as claimed in claim 2 or claim 3 is characterized in that, described welding layer by in ethylene-vinyl acetate copolymer resin, the metallocene linear low density polyethylene any forms at least.

5. such as claim 1 each described zipper tape to the claim 4, it is characterized in that, described welding layer is arranged to wire and is the state that contacts with the bonding upper thread of described interlock along the zipper tape length direction.

6. such as claim 1 each described zipper tape to the claim 4, it is characterized in that, described welding layer is arranged to membranaceous and is along the state of zipper tape length direction and the bonding plane-plane contact of described interlock.

7. the packaging bag with zipper tape is characterized in that, has bag and is installed in claim 1 each described zipper tape to the claim 6 on this bag.