JP2017226457A - Resealable pouch and production method of the same - Google Patents

Abstract

An object of the present invention is to provide a pouch that can be manufactured with a material that can be used as a recycled material as it is when discarded without using a special material such as an adhesive, can be mass-produced at high speed, and is inexpensive. To do.
In a resealable pouch (100) having a biaxially stretched polyethylene terephthalate layer at least as an outermost layer and a sealant layer as an innermost layer, and having a pouring portion at an end, the base of the pouring portion is folded back. And a storage portion (70) that can store the tip of the pouring portion (80) in a sealed state. The storage portion is made of polyethylene terephthalate, and the fusion surface is fused to the outer surface of the laminated film. Resealable pouch characterized by wearing.
[Selection] Figure 1

Description

  The present invention relates to a pouch and a method for manufacturing the pouch. More specifically, the present invention relates to a resealable pouch having a reseal function.

  There are pouches that store liquid contents such as shampoos, rinses, body soaps, liquid detergents, and toiletries represented by softeners, but normal pouches cannot be resealed after opening.

  Various improvements have been made to solve this problem. For example, a pouch is provided with a pour-out path, and a spout with a screw cap is provided at the tip of the pour-out path so that it can be resealed. There is also a pouch in which a chuck is provided in the vicinity of the opening and resealed by the chuck.

  In addition to the front and back films, caps, spouts, chuck tapes, and other materials are required, and processing steps are required to bond them. This is costly, so the contents are not expensive. There was a problem that was difficult.

For example, in Patent Document 1, a flexible packaging material defined by two side walls, including an opening device adjacent to an opening for opening and closing at the time of initial opening,
The unsealing device is a thin first body having a contact surface and a first application surface opposite to the contact surface, and the first application surface is coupled to the outer surface of the side wall of the packaging material by the first application surface; A fixing member,
The thin first body is movable between a basic position and a sealing position by being bent around the first folding axis, and at the sealing position, the contact surfaces have divided portions that face each other directly;
In the packaging material in which the fixing member is disposed in at least one of the divided portions of the contact surface and the releasable fixing of the thin first body can be performed at the sealing position,
The first folding axis is parallel to the opening and can be moved to a resealed state. In the resealed state, the end of the opening is moved around the first folding axis by moving the thin first main body to the sealing position. Proposes flexible packaging materials.

However, this flexible packaging material has a problem that it cannot be used as a recycled material as it is at the time of disposal because the fixing member is fixed to the contact surface using an adhesive.
Furthermore, it is difficult to mass-produce containers, and it is impossible to manufacture them in large quantities and at high speed, and they have to be expensive.

Special table 2013-542147 gazette

  Therefore, the present invention has been made in view of the above circumstances, and can be manufactured using a material that can be used as a recycled material as it is at the time of disposal without using a special material such as an adhesive, and can be mass-produced at high speed. It is an object of the present invention to provide a resealable pouch that is inexpensive and can be resealed.

The present invention has been made in view of such problems, and in a resealable pouch comprising a laminated film having at least a biaxially stretched polyethylene terephthalate layer as an outermost layer and a sealant layer as an innermost layer, and having a pouring portion at an end. ,
It has a storage part that can store the tip of the extraction part with the base of the extraction part folded back and sealed,
The storage portion is a resealable pouch characterized in that the fusion surface is made of polyethylene terephthalate, and the fusion surface is fused to the outer surface of the laminated film.

The resealable pouch of the present invention can be easily sealed by folding the extraction portion at the end and storing the extraction portion in the storage portion. And the said storage part is welded to the outer layer of the resealable pouch which a fusion surface consists of a film piece of polyethylene terephthalate, and an outermost layer consists of a biaxially-stretched polyethylene terephthalate layer, and does not use different resin, such as an adhesive agent. It is attached by welding of polyethylene terephthalate.
For this reason, it can be manufactured from a raw material that can be used as a recycled material as it is at the time of disposal.

Further, the present invention comprises a laminated film having at least a biaxially stretched polyethylene terephthalate layer as an outermost layer and a sealant layer as an innermost layer. The pouring portion and the root of the pouring portion are folded and sealed at the end portion. In the method for manufacturing a resealable pouch provided with a storage part capable of storing the leading end of the protruding part,
The storage unit has a polyethylene terephthalate fusion surface,
After irradiating the outermost surface of the laminated film or the polyethylene terephthalate surface of the storage unit fusion surface with a laser beam in advance, and providing a fusion property between them,
A method for producing a resealable pouch, characterized in that an inner surface of a storage portion is fused to an outer surface of a dispensing portion.

The method for producing a resealable pouch according to the present invention comprises laser irradiation of biaxially stretched polyethylene terephthalate, which is the outermost inner layer of the resealable pouch, and polyethylene terephthalate used for the fusion surface of the film piece. A fusing property is imparted and then fused.
Therefore, a resealable pouch that can be mass-produced at high speed and can be resealed at low cost can be provided.

The resealable pouch and the manufacturing method thereof according to the present invention can be easily sealed by folding the extraction portion at the end and storing the extraction portion in the storage portion. The storage portion is welded to the resealable pouch, and is attached by welding polyethylene terephthalate without using a different resin such as an adhesive.
For this reason, it can be manufactured from a raw material that can be used as a recycled material as it is at the time of disposal.
In addition, since it is attached by welding polyethylene terephthalate having high chemical resistance, there is no risk of the adhesive or the like being melted by the contents, and there is no problem such as peeling off and removing.
Furthermore, it is possible to provide a resealable pouch that can be mass-produced at a high speed and can be resealed at low cost, in order to impart fusibility by laser irradiation.

It is an example of the resealable pouch of this invention, and is the top view and sectional drawing to which the cross section of the accommodating part vicinity was expanded. It is the perspective view which shows the top view which shows the state which cut | disconnected the opening part by the resealable pouch of this invention, and opened, and a film piece shape. FIG. 5 is a plan view showing a state where the resealable pouch of the present invention is folded back at a folding line at the base of an opening portion and the tip of a dispensing portion is locked to a storage portion, and a cross-sectional view in which a cross section near the storage portion is enlarged. It is an example of the resealable pouch which made the extraction | pouring part thin and was easy to accommodate in this invention, and is the top view and sectional drawing to which the cross section of the accommodating part vicinity was expanded. It is a figure which shows the example of various shapes of the film piece used by this invention.

The present invention will be described below with reference to the drawings.
FIG. 1 is an example of the resealable pouch 100 of the present invention, and is a plan view of the resealable pouch 100 and an enlarged cross-sectional view of the vicinity of the storage portion.
The resealable pouch of the present invention comprises a front film 1 and a back film 2 made of a laminated film having at least a biaxially stretched polyethylene terephthalate layer as an outermost layer and a sealant layer as an innermost layer.
As shown in FIG. 1-1, a film container in which the sealant surfaces of the front film 1 and the back film 2 are combined and the surrounding four sides are fused, and the film is formed near the end of the front film 1 or the back film 2. The piece 7 has a fused shape.

In this example, the left end of the upper side of FIG. 1 of the film container has a planned opening line 8 that cuts and opens the left side seal part 4 and the upper side seal part 3. 80. Cutouts 81 may be provided at both ends of the expected opening line 8.
Further, a folding line 9 for folding the root of the spout 80 may be provided substantially parallel to the planned opening line 8.
When attaching the fold line 9, it may be pressed with a round blade at the cutting edge and attached with a bend that is easy to bend, but the laser beam is scanned, the biaxially stretched film etc. is once melted and solidified again, Remelting with the crystal state changed may be processed into a linear shape.
Further, a storage portion 70 to which the film piece 7 is welded is provided further toward the center from the folding line 9.

In this example, the lower end of the resealable pouch 100 is formed in the standing pouch with the intermediate film 60 bent on the outer surface side inserted, but it may not be a standing pouch as long as it is powder or granules. Absent.
The bottom side seal portion 6 is formed by fusing the front film 1 and the intermediate film 60, the back film 2 and the intermediate film 60, and filling the contents to open the folded intermediate film 60 to form the bottom, Can be independent.
When the resealable pouch 100 is set up in this manner, the spout 80 is on the upper side, and after pouring, the contents in the vicinity of the spout 80 are moved to the lower side inside the container, and the resealed spout 80 is moved to the resealed spout 80. It can be made difficult to apply excessive force.

FIG. 1-2 is a cross-sectional view of the storage portion 70 cut along a line XX in FIG. 1-1.
A film piece 7 is welded in the vicinity of one of the left and right ends of the upper surface seal portion 3 of the front film 1.
The front film 1 is composed of a laminated film having at least a biaxially stretched polyethylene terephthalate layer as an outermost layer and a sealant layer as an innermost layer.
The storage unit 70 is a film piece having a fusion surface made of polyethylene terephthalate, and has a cut 71 on the fold line 9 side so that the inside of the cut is lifted from the weld surface.

FIG. 2 is an example of the resealable pouch 100 according to the present invention, and is a plan view showing a state in which the corner of the resealable pouch is cut at the planned opening line 8 and opened, and a perspective view showing the shape of the film piece 7. .
FIG. 2-1 shows a state in which the scheduled opening line 8 is cut with scissors or the like, and the extraction portion 80 is opened.
The planned opening line 8 is in the vicinity of the corner where the upper surface seal portion 3 and the left side seal portion 4 where the front film 1 and the rear film 2 are fused, and is parallel to the fold line 9 and to the left side of the upper surface seal portion 3. It is made of an inclined line extending over the face seal portion 4.
An opening may be created by providing a notch at the end of the planned opening line. Furthermore, the base line of the planned opening line and the polyethylene terephthalate layer on the surface may be processed with a weak line by laser light, or a blade is physically inserted into the outer layer or the base part to make a half-cut weak line. It is desirable to process and allow the package to be torn without deviation from the expected opening line.

FIG. 2-2 is a perspective view showing the shape of the film piece 7.
A welded portion is left around, and a U-shaped cut 71 is formed in the center. The shape of the cut is preferably an arc at the center, but it is not necessarily limited to an arc.
As a material of the film piece 7, polyethylene terephthalate resin is used on the welding surface to be welded to the front film or the back film.

The front film 1 and the back film 2 also have a biaxially stretched polyethylene terephthalate layer as the outermost layer.
The biaxially stretched polyethylene terephthalate layer 11 that is the outermost layer of the resealable pouch and the polyethylene terephthalate on the fused surface of the film piece 7 that is the storage portion are stretched by biaxial stretching by irradiating laser light, and are fused. It is possible to obtain the fusion property from the state of having lost the.
The laser to be used is a laser having a wavelength in the infrared region, for example, a carbon dioxide gas laser with a wavelength of 10.6 μm, using an output of 30 W, scanning with an irradiation range of a spot diameter of 0.14 mm and a scanning speed of 4000 mm / sec. Scanning was performed at a pitch of 0.1 mm.

The irradiated biaxially stretched polyethylene terephthalate surface rapidly becomes high temperature, and is rapidly cooled by short-time irradiation. For this reason, the orientation is partially lost and the film can be fused.
If the polyethylene terephthalate resin layer 71 used on the inner surface of the film piece 7 forming the storage portion 70 is an unstretched resin and has fusion properties, the laser irradiation to the film piece 7 forming the storage portion 70 is unnecessary. Of course, in the case of the polyethylene terephthalate resin layer 71 in which the film piece 7 is stretched, it is necessary to be able to be fused by laser irradiation.

This irradiation with laser light is processed into a fine structure with a non-flat surface by irradiation, and is given a fusion property.
In the fine structure processed by this irradiation, a plurality of linear ridges are arranged in parallel at predetermined intervals. In addition, the microstructure processed by irradiation has a feature that the light reflectance of the microstructure region is larger than that of other regions. By confirming such a change, the molecular orientation of the surface is different from that of other regions. It can be determined that it is at least partially reduced or disappeared compared to.
Then, such a changed polyethylene terephthalate surface can be a fused surface to which fusibility is imparted.

The film piece 7 may be a polyethylene terephthalate film alone. If a laminated film is used, polystyrene, low density polyethylene, polycarbonate, polymethyl methacrylate, polyarylate, polysulfone, polyethersulfone, polypropylene / ethylene copolymer, polybutylene terephthalate, polyamide, polyoxymethylene, poly Phenyl sulfide or the like can be used. Even when it is desired to color the film piece 7, the surface of the fused portion needs to be a polyethylene terephthalate surface without printing in order to ensure the fusion property.
Multi-layered with such a resin layer, making it easier to hold with the waist and the pouring part sandwiched, or by partially curving, the cut part will rise, making it easy to insert the pouring part 80 Can do.
In the manufacturing process of an actual resealable pouch, the laminated film or film piece is in a wound state, and laser irradiation is performed on the biaxially stretched polyethylene terephthalate on the fused surface before cutting the outer shape. At this time, the planned opening line may be processed into a fragile line.
The film piece of the storage portion is fused to the outermost layer of the laminated film after the meltability is partially given by laser irradiation.
As the welding conditions, for example, the welding can be performed under such conditions as a pressure of 2 MPa, a sealing temperature of 140 ° C., and a sealing time of 2 seconds. FIG. 3 shows an example of the resealable pouch 100 of the present invention. FIG. 8 is a plan view showing a state where the tip of the pouring part 80 is locked to the storage part 70 and a sectional view in the vicinity of the storage part 70 is enlarged.
As shown in FIG. 3A, the end portion of the resealable pouch is cut at the planned opening line 8, and the opened extraction portion 80 is bent at the folding line 9, and the film piece 7 is formed by welding. The tip of the extraction unit is inserted into the storage unit 70.

3-2 is a cross-sectional view taken along a YY portion of FIG. 3-1. The unsealed pouring part 80 was inserted into the storage part 70 from the cut 71 of the film piece 7 and locked, and the sealed state was shown.
The resealable pouch is folded at the fold line 9, the front film 1 and the back film 2 are pressed against each other, and the pouring part is completely closed, so that the content does not flow out from the pouring part 80.

FIG. 4 is another embodiment of the present invention, in which FIG. 4-1 is an overall view and FIG. 4-2 is a cross-sectional view taken along the line ZZ of FIG. 4-1. In this embodiment, one laminated film is folded by the upper surface folding part 30, and the front side is a front film and the back side is a back film. Further, the upper surface seal portion 3 and the side surface seal portion that form the extraction portion 80 are provided with an upper surface seal portion recess 31 and a left side seal portion recess 41 into which the seal portion has entered, so that the base of the extraction portion 80 becomes narrower. Therefore, it is easy to insert into the storage unit 70.
Furthermore, since the open end of the film piece 7 is an arc and there is no welded portion on the open end side, the pouring portion 80 can be smoothly inserted while sliding on the surface of the front film 1.
Further, since the folding line 72 is provided at the center of the storage portion, a gap is formed at the open end tip, so that the dispensing portion 80 can be inserted into the storage portion without turning up the open end of the film piece 7. is there.
Thus, the functionality may be improved by changing the shape of the resealable pouch.

FIG. 5 is a diagram illustrating a shape example of the film piece 7.
FIG. 5A is a film piece 7 shown in FIG. 1, which has a notch 71 having a U-shape and a circular arc at the center, and is set to weld the periphery. All the surroundings are welded portions 73.

  FIG. 5-2 is the film piece shown in FIG. 4, and the cut becomes a tip shape of the arc of the film piece and can be inserted from the arc part.

  FIG. 5C is an example of a shape that is a U-shaped cut, but the tip is not a circular arc but a straight line and matches the outer shape. There are actually two cuts on the left and right.

  FIG. 5-4 is an example of a shape in which the notch 71 of FIG. 5-3 has a shape in which the center of the U-shape is an arc and the welded portion is retreated downward and is easy to insert.

The laminated film used for the front film and back film used for resealable pouches is a biaxially stretched polyethylene terephthalate layer on the outermost side and a low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, ethylene as a sealant on the innermost layer.・ Propylene copolymer, ethylene / vinyl acetate copolymer, ionomer resin, etc. can be used, and there is no problem in any configuration as long as the storage stability and strength of the contents can be secured.
For example, from the outside
Polyethylene terephthalate / polyethylene,
Polyethylene terephthalate / polyethylene / inorganic oxide vapor-deposited polyethylene terephthalate / polyethylene,
Polyethylene terephthalate / polyethylene / ethylene vinyl acetate copolymer saponified product / polyethylene,
Polyethylene terephthalate / polyethylene / adhesive resin / polyamide / adhesive resin / polyethylene,
Polyethylene terephthalate / polyamide / adhesive resin / polyethylene / aluminum foil / polyethylene,
A general configuration such as
These films can be bonded using a machine such as ordinary dry lamination or extruder lamination, or can be produced using a multi-layer inflation machine.

The resealable pouch 100 of the present invention is as described above. The extraction portion 80 is cut off and opened at the planned opening line 8, and after the contents are poured out, it is folded back at the folding line 9 at the base of the extraction portion 80. The resealable pouch 100 is simply sealed by simply inserting the tip of the pouring part 80 into the storage part from the cut of the storage part 70 and fixing it.
Therefore, compared to chucks and spouts, etc., it is composed of simple members, so that there is an advantage that the amount of resin for manufacturing the package can be reduced and the environmental load can be suppressed.
In addition, when the bag is resealed, the liquid droplets of the contents attached to the tip of the dispensing portion do not sag.
Further, since the force for opening the bag or the force for shifting the folding position is used as a force for locking, the folding is not easily disengaged.
Furthermore, when used in a standing pouch, there is no pressure from the inside of the pouring part, and even if the engagement of the tip of the spout is disengaged from the storage part, the contents do not leak immediately, and a slight gap is left. Even if there is, it is hard to leak.
Furthermore, when a half cut is made with a laser, folding becomes easy and familiarity becomes easy, and it becomes difficult to disengage the tip of the spout from the storage portion.
Also, because the fusion between the storage part and the pouch is attached by welding polyethylene terephthalate with high chemical resistance, there is a risk that even if the content hangs down on the fused part, the adhesive may be melted by the content. There is no problem, such as peeling off and coming off.
Moreover, the present invention that makes it possible to use such a function for a conventional pouch is easy to incorporate as it is by applying a conventional production line. In particular, since the film pieces are welded using a laser, it is easy to incorporate into the line and can be processed at high speed, so it can be processed without degrading the production line capacity, and it can be provided with a resealing function at a low price. There is.

100 ··· Resealable pouch 1 ··· Front film 2 ··· Back film 3 ··· Top seal portion 30 ··· Upper folded portion 31 ···・ ・ Top seal part dent 4 ・ ・ ・ ・ ・ ・ Left side seal part 41 ・ ・ ・ ・ ・ Left side seal part dent 5 ・ ・ ・ ・ ・ ・ Right side seal part 6 ・ ・ ・ ・ ・ ・ Bottom seal part ... Intermediate film 7 ... Film piece 70 ... Storage part 71 ... Incision 72 ... Fold line 73 ... Welding part 8 ...・ ・ ・ ・ Scheduled opening line 80 ・ Pouring part 81 ・ Notch 9 ・ ・ ・ ・ ・ ・ Bending line

Claims (8)

In a resealable pouch having a biaxially stretched polyethylene terephthalate layer at least as an outermost layer and a laminated film having a sealant layer as an innermost layer, and having a pouring portion at an end,
It has a storage part that can store the tip of the extraction part with the base of the extraction part folded back and sealed,
The resealable pouch characterized in that the storage portion is made of polyethylene terephthalate and the fusion surface is fused to the outer surface of the laminated film.   The resealable pouch according to claim 1, wherein the surface of the fused portion with the storage portion of the outermost layer of the laminated film constituting the resealable pouch is a polyethylene terephthalate surface without printing. Consists of a laminated film with at least a biaxially stretched polyethylene terephthalate layer as the outermost layer and a sealant layer as the innermost layer. The pouring part at the end and the tip of the pouring part can be stored in a sealed state. In the method of manufacturing a resealable pouch provided with a proper storage part,
The storage portion is provided with polyethylene terephthalate on the fusion surface,
After irradiating the outermost surface of the laminated film or the polyethylene terephthalate surface of the storage unit fusion surface with a laser beam in advance, and providing a fusion property between them,
A method for manufacturing a resealable pouch, wherein the inner surface of the storage portion is fused to the outer surface of the extraction portion.   The method for producing a resealable pouch according to claim 3, wherein a carbon dioxide laser beam having an infrared wavelength is used as the laser beam.   The method for producing a resealable pouch according to claim 3 or 4, wherein the surface is processed to have a fine structure by irradiation with a laser beam to impart a fusion property.   6. The resealable pouch manufacturing method according to claim 5, wherein a plurality of linear ridges are arranged in parallel at a predetermined interval as the fine structure.   The method for producing a resealable pouch according to claim 5 or 6, wherein the light reflectance of the fine structure region in the biaxially stretched polyethylene terephthalate layer is larger than that of other regions.   In the microstructure region, the molecular orientation on the surface of the biaxially stretched polyethylene terephthalate is at least partially reduced or lost as compared with other regions. Manufacturing method of resealable pouch.

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