JP4186501B2 - Manufacturing method and manufacturing apparatus for packaging bag having spout - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging bag that contains contents such as liquid and has a spout that prevents bleeding after opening, and more particularly to a packaging bag that has a self-closing spout, a manufacturing method thereof, and a manufacturing apparatus.
[0002]
[Prior art]
Liquid packaging with a self-closing spout that has been made of a flexible material such as plastic film and that does not flow out of the liquid stored in the bag even if it is hung with the spout facing downward after opening. Bags are known (for example, Japanese Utility Model Publication No. 62-93040). The self-closing spouts of these liquid packaging bags are usually formed by heat-sealing a plastic film, and after opening, the spout part is deformed into a V shape so that the liquid stored in the bag flows out. Is to prevent.
However, when a liquid with good wettability such that the contact angle with the material constituting the inner surface of the film is 90 degrees or less is stored inside the bag, the liquid oozes due to capillary action from a minute gap in the spout passage. There was a problem of getting out.
[0003]
[Problems to be solved by the invention]
The present invention solves the above-mentioned problems of the prior art, and the contents such as liquid stored in the bag ooze out little by little even if the spout is hung down after opening the spout. It is an object to provide a packaging bag having a spout capable of preventing the above, particularly a packaging bag having a self-closing spout, a manufacturing method and a manufacturing apparatus therefor.
[0004]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors have found that a conventional spout where a liquid or the like stored in the bag oozes is present at the boundary between the heat seal portion and the non-heat seal portion of the spout passage. As shown in FIG. 3 (B), it was found that there is a minute gap. Further, by forming the inner surface of the film constituting the non-heat-sealed portion side of the boundary portion so as to be in contact with each other (see FIG. 3A) so as not to generate a minute gap in the boundary portion (see FIG. 3A), wetting The present invention has been completed by discovering that bleeding of liquid or the like can be prevented even when a good liquid or the like is stored inside the bag.
[0005]
  That is, the present invention has the following configuration.
1. When a plastic bag constituting a packaging bag is heat-sealed by sandwiching between glass cloth substrates and a packaging bag having a spout formed by a heat-sealed part and a non-heat-sealed part is manufactured, the heating part of the heat-seal head is poured. In the part corresponding to the non-heat seal part of the exit passageA non-pressing part is provided, and an elastic pressing member, a thin metal plate, a glass cloth base, a plastic film and a glass cloth base are sequentially placed on the pressure part facing the heating part of the heat seal head to mold the heat seal head. By tightening and heating and pressurizing the plastic film with the heating part and pressurizing partA method for producing a packaging bag, characterized by heat-sealing.
2. When a plastic bag constituting a packaging bag is heat-sealed by sandwiching between glass cloth substrates and a packaging bag having a spout formed by a heat-sealed part and a non-heat-sealed part is manufactured, the heating part of the heat-seal head is poured. In the part corresponding to the non-heat seal part of the exit passageUse a heat seal head with a cooling part so that there is no step on the heat seal surface when the heat seal head is clamped.A method for producing a packaging bag, characterized by heat-sealing.
3.3. The cooling unit is provided at a portion corresponding to the non-heat sealing portion of the spout passage of the heating unit of the heat seal head via an elastic member.Production method.
4). Heat seal head heating sectionAnd a gap between the cooling partIt is characterized by2 or3. The production method according to 3.
5. Heating and cooling part of heat seal headIs composed of one member, and a heating part and a cooling part.It is characterized by providing a gap between2The manufacturing method as described in.
6).In a packaging bag manufacturing apparatus in which a plastic film constituting a packaging bag is sandwiched between glass cloth substrates and heat sealed, and a spout is formed by a heat seal part and a non-heat seal part, the spout of the heating part of the heat seal head The non-pressing portion is provided at a portion corresponding to the non-heat sealing portion of the passage, and the elastic pressing member, the metal thin plate, and the glass cloth base material are sequentially placed on the pressing portion facing the heating portion of the heat seal head. Packaging bag manufacturing equipment.
7. In a packaging bag manufacturing apparatus in which a plastic film constituting a packaging bag is sandwiched between glass cloth substrates and heat sealed, and a spout is formed by a heat seal part and a non-heat seal part, the spout of the heating part of the heat seal head In the part corresponding to the non-heat seal part of the passage, The cooling section so that there is no step on the heat seal surface when the heat seal head is clampedAn apparatus for manufacturing a packaging bag.
8).A cooling part is provided via an elastic member at a portion corresponding to the non-heat sealing part of the spout passage of the heating part of the heat seal head.It is characterized by7Manufacturing equipment.
9.The gap between the heating part and the cooling part of the heat seal headIt is characterized by having7 or 8Manufacturing equipment.
10. Heat seal head heating sectionAnd the cooling part are composed of one member, and a gap is formed between the heating part and the cooling part.It is characterized by having provided7The manufacturing apparatus described in 1.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Next, features of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the vicinity of the spout of the packaging bag of the present invention, and FIG. 2 is a schematic cross-sectional view of the whole spout passage of the packaging bag of FIG. 1 in an unopened state. 3 is a partially enlarged schematic view of a portion X in FIG. 2, in which (A) shows a packaging bag of the present invention and (B) shows a conventional packaging bag. 4 and 5 are schematic cross-sectional views showing a cross-sectional shape of a section cut out perpendicularly to the spout passage from the spout of the packaging bag of FIG.
In the present invention, in a packaging bag 1 in which a plastic film is heat sealed and a self-sealing spout 3 is formed by the heat seal 2 and the non-heat seal 6, a heat seal 2 and a non-heat seal of the spout passage 4 are formed. As shown in FIG. 3 (A), the inner surface of the film constituting the non-heat seal portion 6 side of the boundary portion A of 6 is in contact with each other in an unopened state so that there is no gap. It is characterized by comprising.
[0007]
In a conventional packaging bag having a self-closing spout, the inner surface of the film constituting the non-heat seal portion 6 side of the boundary portion A between the heat seal portion 2 and the non-heat seal portion 6 of the spout passage 4 is shown in FIG. As seen in (B), in order to have a minute gap 30 in an unopened state, if the bag is hung with the spout 3 down after opening the packaging bag, a capillary phenomenon occurs from this gap 30. As a result, the contents such as liquid may ooze out.
In the present invention, by using the manufacturing method and apparatus described later, it is possible to prevent a minute gap 30 from being formed in the boundary portion A between the heat seal portion 2 and the non-heat seal portion 6 of the spout passage 4, and It has succeeded in eliminating the bleeding of the contents.
[0008]
Another feature of the packaging bag of the present invention is that the section 5 cut perpendicularly to the spout passage 4 from the self-closing spout 3 of the packaging bag and the heat seal portion 2 of the spout passage 4 and the non-heated portion. An opposing film inner surface is formed from the boundary portion A of the seal portion 6 toward the non-heat seal portion 6 side to a point B that is separated by a distance corresponding to the thickness d of the film constituting the non-heat seal portion 6. The cross-sectional shape to be formed is a straight line [FIG. 4A] to a curved shape convex to the inner surface [FIG. 4B].
As shown in FIGS. 4A and 4B, the cross-sectional shape formed by the film inner surface of the spout is either linear or inner as shown in FIGS. 4A and 4B. In addition to the curved shape convex on the side, one may be linear and the other may be curved on the inner surface side.
[0009]
Still another feature of the packaging bag of the present invention is that the section 5 cut perpendicularly to the spout passage 4 from the self-closing spout 3 of the packaging bag and the heat seal portion 2 of the spout passage 4 are not. The angle formed by the tangent line with the boundary between the heat seal part and the non-heat seal part as the base point in the cross-sectional shape formed by the surface on the inner surface side of the film facing from the boundary part A of the heat seal part 6 toward the non-heat seal part 6 side For example, α (see FIG. 5) is set to be 20 degrees or less.
When the angle α formed by the tangent line is larger than 20 degrees, the effect of preventing the contents such as the liquid from seeping out from the spout decreases.
[0010]
In the present invention, the cross-sectional shape of the slice 5 cut out from the self-closing spout 3 is obtained by slicing the passage 4 of the spout 3 of the packaging bag 1 in a direction perpendicular to the passage, as seen in FIG. When the cross section of the slice 5 having a width of 5 to 50 μm is observed with an optical microscope in a non-pressurized state, it means a shape formed by the inner surface of the film.
The cross-sectional shape of the boundary portion A of the spout 3 of the packaging bag 1 of the present invention is the unsealed state when the packaging bag is manufactured by heat sealing, when the heat sealing portion 2 and the non-heat sealing portion of the spout passage 4 are manufactured. 6, the inner surface of the film constituting the non-heat seal portion 6 side of the boundary portion A is in close contact as seen in FIG. 2 and FIG. When observing in an unpressurized state using an optical microscope, the cross-sectional shape of the boundary portion A of the spout 3 is such that the non-heat seal portion 6 side of the boundary portion A is as shown in FIGS. It becomes an opening.
[0011]
In the present invention, by making the cross-sectional shape of the self-closing spout and the cross-sectional shape of the section cut out from the spout as the above-mentioned specific one, even if the spout is hung down after opening the spout This prevents the contents such as liquid stored in the bag from oozing out little by little.
[0012]
As shown in FIG. 6, the conventional packaging bag having a self-closing spout has a heating part 21 of the heat seal head that forms a spout when the spout is formed by heat-sealing a plastic film. A non-pressing portion 22 is provided at a portion corresponding to the non-heat seal portion of the spout passage, and a pressure portion 23 facing the heating portion 21 of the heat seal head is impregnated with an elastic pressing member 24 made of silicone rubber or the like, Teflon, Glass cloth substrate 25 baked and coated with silicon adhesive on one side, plastic film 26 and 26 constituting a packaging bag, Teflon impregnated and baked, glass cloth substrate 25 coated with silicon adhesive on one side Are sequentially placed, the heat sealing head is clamped, and the plastic films 26 and 26 are heated and pressurized by the heating unit 21 and the pressurizing unit 23. And Toshiru was achieved, thereby forming a spout.
[0013]
In this prior art, as shown in FIG. 7, the elastic pressing member 24 is not pressurized in the non-pressing portion 22 of the heating portion 21 of the heat seal head at the time of heat sealing. The heat seal force is not applied uniformly at the boundary of the heat seal part. For this reason, as seen in FIG. 3B, a minute gap 30 is formed at the boundary portion A between the heat seal portion 2 and the non-heat seal portion 6 of the spout passage 4.
Moreover, in the section 5 cut out perpendicularly to the spout passage 4 from the self-closing spout 3 of the packaging bag, the cross-sectional shape formed by the film inner surface is the heat seal portion as shown in FIG. 2 and the non-heat-sealed portion 6 in the vicinity of the boundary portion A, the outer surface has a convex curved shape [FIG. 8A] or an irregular curved shape [FIG. 8B], and the heat-sealed portion 2 And the angle α (see FIG. 5) formed by the tangent line with the boundary portion A of the non-heat seal portion 6 as a base point is also larger than 20 degrees.
Therefore, in the conventional packaging bag, the contents such as liquid ooze out from the vicinity of the boundary portion A between the heat seal portion 2 and the non-heat seal portion 6 of the spout passage 4.
[0014]
In the present invention, as shown below, when manufacturing a packaging bag having a self-closing spout by heat-sealing a plastic film, a novel heat seal developed by the present inventors was formed. By using such a method and apparatus, the cross-sectional shape of the spout and the cross-sectional shape of the section cut out from the spout are made the above-mentioned specific shapes, and leakage of contents such as liquid is prevented.
[0015]
FIG. 9 is a schematic diagram showing an example of the main part of the manufacturing method and manufacturing apparatus for a packaging bag having a self-closing spout of the present invention.
In this example, a detachable non-heatable pressing member 28 is provided at a portion corresponding to the non-heat seal portion of the spout passage of the heating portion 21 of the heat seal head of the portion forming the spout of the packaging bag. The non-heatable pressing member 28 is made of polyacetal, polyamide, polyimide, polyamideimide, polyetherimide, polyetheretherketone (PEEK), phenol resin, melamine resin, polyphenylene sulfide (PPS), polybutylene terephthalate (PBT), polyethylene. Terephthalate (PET), epoxy resin, brominated epoxy resin, tetrafluoroethylene polymer (PTFE), trifluorinated ethylene chloride polymer, tetrafluoroethylene-6 fluoropropylene copolymer (FEP), tetrafluoride Resin, such as ethylene-perfluoroalkoxyethylene copolymer (PFA), tetrafluoroethylene-ethylene copolymer (ETFE), liquid crystal polymer, or the above resins, glass fiber, carbon fiber, alumina, silica, etc. Filled with inorganic powder Since the temperature rises by heat-sealing the packaging bag, it is removed from the heating part 21 after heat sealing, and the portion of the pressing member where the temperature has not risen is formed. It is used by being mounted on the heating unit 21 or the pressing member is mounted again on the heating unit 21 after cooling. On the pressure unit 23 facing the heating unit 21 of the heat seal head, an elastic pressing member 24 made of silicone rubber or the like, a glass cloth base material 25 impregnated and baked with Teflon, and coated with a silicone adhesive on one side, The plastic films 26 and 26 constituting the packaging bag and the glass cloth base material 27 provided with a Teflon sheet layer on the surface are sequentially placed, the heat seal head is clamped, and the plastic film 26 is formed by the heating unit 21 and the pressurizing unit 23. , 26 is heat-sealed by heating and pressurizing to form a spout.
[0016]
In this example, by providing the detachable non-heatable pressing member 28 to the heating part 21 of the heat seal head, the non-heat seal part of the spout passage does not reach the temperature necessary for heat sealing, and is thus heat sealed. There is nothing. And by providing this non-heatable pressing member 28, the heat seal part and the non-heat seal part of the spout are uniformly pressurized at the boundary, so the heat seal part of the spout passage and the non-heat seal As shown in FIG. 3A, the inner surface of the film constituting the non-heat seal part side of the boundary part of the parts is in contact with each other in the unopened state and does not have a gap.
[0017]
Further, the cross-sectional shape of the slice cut out from the spout is a straight curve or a smooth curved line convex toward the inner surface as seen in FIG. An angle α formed by a tangent line with the boundary portion A of the heat seal portion 6 as a base point is also 20 degrees or less. Therefore, in this packaging bag, contents such as liquid do not ooze out from the boundary portion, unlike the packaging bag of the prior art.
In this example, the number and material of the glass cloth bases 25 and 27 interposed between the plastic films 26 and 26 constituting the packaging bag and the heating part 21 or the pressurizing part 23 of the heat seal head constitute the packaging bag. Depending on the material, thickness, etc. of the plastic film to be selected, it can be appropriately selected or omitted.
[0018]
FIG. 10 is a schematic view showing another example of the main part of the manufacturing method and the manufacturing apparatus of the packaging bag having the self-closing spout of the present invention.
In this example, the non-pressing part 22 is provided in the part corresponding to the non-heat-sealing part of the spout passage of the heating part 21 of the heat-seal head of the part forming the spout of the packaging bag, and the heating part 21 of the heat-seal head. An elastic pressing member 24 made of silicone rubber or the like, a metal thin plate 29 made of aluminum or the like, impregnated and baked with Teflon, and coated with a silicone-based adhesive on one side, a packaging bag The glass cloth substrate 25 impregnated and fired with plastic films 26, 26 and Teflon, and a glass cloth base material 25 coated with a silicone adhesive on one side is sequentially placed, the heat seal head is clamped, and the heating unit 21 is pressurized. The plastic film 26, 26 is heated and pressurized by the portion 23 to heat-seal and form a spout. At this time, the thin metal plate 29 can be made of, for example, aluminum and has a thickness of about 0.1 mm to 0.3 mm. However, an optimal material and thickness are selected according to conditions such as pressure during heat sealing. Can be used.
[0019]
In this example, a metal thin plate 29 made of aluminum or the like is placed on an elastic pressing member 24 made of silicone rubber or the like, so that the heat seal head is clamped and the plastic film 26 is heated by the heating part 21 and the pressure part 23. , 26 is heated and pressurized to heat-seal, pressure is applied to the elastic pressing member 24 in the non-pressing part 22 of the heating part 21 as well as other parts (heat-seal part). Therefore, the heat seal part and the non-heat seal part of the spout of the packaging bag are almost uniformly pressurized at the boundary, so the non-heat seal of the boundary part between the heat seal part and the non-heat seal part of the spout passage As shown in FIG. 3A, the inner surface of the film constituting the part side is in contact with each other in the unopened state and has no gap.
[0020]
Further, the cross-sectional shape of the slice cut out from the spout is a straight curve or a smooth curved line convex toward the inner surface as seen in FIG. An angle α formed by a tangent line with the boundary portion A of the heat seal portion 6 as a base point is also 20 degrees or less. Therefore, in this packaging bag, contents such as liquid do not ooze out from the boundary portion, unlike the packaging bag of the prior art.
The number and material of the glass cloth base material 25 interposed between the plastic films 26 and 26 constituting the packaging bag and the heating part 21 or the metal thin plate 29 of the heat seal head are the material of the plastic film constituting the packaging bag, It can be appropriately selected or omitted depending on the thickness or the like.
[0021]
FIG. 11 is a schematic view showing another example of the main part of the manufacturing method and the manufacturing apparatus of the packaging bag having the self-closing spout of the present invention.
In this example, the non-pressing part 22 is provided in the part corresponding to the non-heat-sealing part of the spout passage of the heating part 21 of the heat-seal head of the part forming the spout of the packaging bag, and the heating part 21 of the heat-seal head. Impregnated and fired with Teflon in the pressure part 23 facing the glass cloth substrate 25 coated with a silicone adhesive on one side, plastic films 26 and 26 constituting a packaging bag, impregnated with Teflon and baked on one side The glass cloth base material 25 coated with a silicone adhesive is sequentially placed, the heat seal head is clamped, and the plastic film 26, 26 is heated and pressurized by the heating unit 21 and the pressurizing unit 23 for heat sealing. , Which forms a spout.
In this example, the plastic film 26, 26 is uniformly pressed and heat-sealed without using the elastic pressing member 24 as in the prior art shown in FIG. In order to make the cross-sectional shape of the section cut out from the spout into a desired shape, it is necessary to improve the planar accuracy of the heating part 21 and the pressure part 23 of the heat seal head and to adopt a uniform pressure method. It becomes.
[0022]
FIG.12 and FIG.13 is a schematic diagram which shows the other example of the principal part of the manufacturing method and manufacturing apparatus of a packaging bag which have a self-closing pouring mouth of this invention, respectively.
In this example, a flow path 42 is provided at a portion corresponding to the non-heat seal portion of the spout passage between the heating portions 21 and 21 of the heat seal head of the portion that forms the spout of the packaging bag to pass the refrigerant. The cooling unit 43 is provided in such a manner that the side surfaces thereof are in contact with the lower end of the heating unit 21 of the heat seal head and there is no step on the heat seal surface. The cooling unit 43 is made of plastic or ceramics having excellent heat insulation and heat resistance. Suitable materials constituting the cooling unit 43 include, for example, polyacetal (POM), polyamide (PA), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyether ether ketone (PEEK). , Polyethernitrile (PEN), polysulfone (PSF), polyethersulfone (PES), polyarylate (PAR), polyimide (PI), polyamideimide (PAI), polyetherimide (PEI), phenol resin, melamine resin , Epoxy resin, brominated epoxy resin, tetrafluoroethylene polymer (PTFE), tetrafluoroethylene-6 fluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkoxyethylene copolymer (PFA) Resin such as tetrafluoroethylene-ethylene copolymer (ETFE), liquid crystal polymer, or foamed one of the above resins, or inorganic powder such as glass fiber, carbon fiber, alumina, or silica. Resin that has been reinforced by filling it can be used.
[0023]
Moreover, in order to balance heat insulation, heat resistance, and strength, the cooling unit 43 may be made of a plurality of resins. The plurality of resins can be formed in multiple layers in parallel with the flow path 42 or partially different resins can coexist. On the pressure part 23 where the heating part 21 and the cooling part 43 of the heat seal head face each other, a glass cloth in which an elastic pressing member 24 made of silicone rubber or the like, impregnated and baked with Teflon, and coated with a silicone adhesive on one side A base material 25, plastic films 26 and 26 constituting a packaging bag, and a glass cloth base material 27 provided with a Teflon sheet layer on the surface are sequentially placed, the heat seal head is clamped, and the heating unit 21 and the pressure unit 23 are placed. Thus, the plastic films 26 and 26 are heated and pressurized to heat-seal and form a spout.
At this time, the cross-sectional shape of the flow path 42 is designed so that an appropriate cooling state according to the shape of a desired spout is obtained. In addition, as the refrigerant passing through the flow path 42, for example, water or ammonia can be used, but an optimum one can be selected and used according to conditions such as temperature at the time of heat sealing.
[0024]
In this example, by providing the cooling unit 43 between the heating units 21 and 21 of the heat seal head, the portion pressurized by the cooling unit 43 does not reach the temperature required for heat sealing. A non-heat seal part is formed. Then, by providing the heating parts 21 and 21 and the cooling part 43 of the heat seal head without any step, the heat seal part and the non-heat seal part of the spout are uniformly pressurized at the boundary. As shown in FIG. 3A, the inner surface of the film constituting the heat seal portion side of the boundary between the heat seal portion and the non-heat seal portion of the outlet passage is in contact with each other in an unopened state. It does not have a cage gap.
[0025]
Further, the cross-sectional shape of the slice cut out from the spout is a straight curve or a smooth curved line convex toward the inner surface as seen in FIG. An angle α formed by a tangent line with the boundary portion A of the heat seal portion 6 as a base point is also 20 degrees or less. Therefore, in this packaging bag, contents such as liquid do not ooze out from the boundary portion, unlike the packaging bag of the prior art.
[0026]
In addition, as a structure of the cooling unit 43, a heat exchanger 44 such as a heat pipe can be used as shown in FIG. In this example, the heat pipe 44 is embedded in the cooling unit 43, and the upper side of the heat pipe 44 is in the flow path 42 through which the coolant passes and is cooled. At this time, heat exchange is performed between the upper and lower sides of the heat pipe 44, so that the portion pressurized by the cooling unit 43 does not reach the temperature required for heat sealing, so a non-heat sealing portion of the spout passage is formed. Is done.
[0027]
FIG. 14 is a schematic view showing another example of the main part of the manufacturing method and the manufacturing apparatus of the packaging bag having the self-closing spout of the present invention, and (A) is a state before the heat sealing head is clamped. FIG. 4B is a diagram illustrating a state where the heat seal head is clamped.
In this example, a flow path 42 is provided at a portion corresponding to the non-heat seal portion of the spout passage between the heating portions 21 and 21 of the heat seal head of the portion that forms the spout of the packaging bag to pass the refrigerant. The cooling unit 43 is provided via the spring 48 in a state where the heating unit 21 and the side surfaces are in contact with each other. On the pressure part 23 where the heating part 21 and the cooling part 43 of the heat seal head face each other, a glass cloth in which an elastic pressing member 24 made of silicone rubber or the like, impregnated and baked with Teflon, and coated with a silicone adhesive on one side A base material 25, plastic films 26 and 26 constituting a packaging bag, and a glass cloth base material 27 provided with a Teflon sheet layer on the surface are sequentially placed, the heat seal head is clamped, and the heating unit 21 and the pressure unit 23 are placed. Thus, the plastic films 26 and 26 are heated and pressurized to heat-seal and form a spout. In this case, by adjusting the force of the spring 48 provided in the cooling part 43, the heat seal part and the non-heat seal part of the spout can be uniformly pressurized as shown in FIG.
At this time, as the refrigerant passed through the flow path 42, for example, water or ammonia can be used, but an optimum one can be selected and used depending on conditions such as temperature at the time of heat sealing.
In addition, various types of springs such as a helical spring and a leaf spring can be used as the spring 48. Instead of these springs, various types of rubber, elastic plastic, or elastic members such as foams can be used. it can.
[0028]
In this example, similarly to the example shown in FIG. 12, by providing the cooling unit 43 between the heating units 21 and 21 of the heat seal head, the portion pressurized by the cooling unit 43 has a temperature necessary for heat sealing. Therefore, the non-heat seal portion of the spout passage is formed. By forming the spout in this way, the inner surface of the film constituting the non-heat seal portion side of the boundary between the spout passage heat seal portion and the non-heat seal portion can be seen in FIG. As can be seen, they are in contact with each other in an unopened state and do not have a gap.
[0029]
Further, the cross-sectional shape of the slice cut out from the spout is a straight curve or a smooth curved line convex toward the inner surface as seen in FIG. An angle α formed by a tangent line with the boundary portion A of the heat seal portion 6 as a base point is also 20 degrees or less. Therefore, in this packaging bag, contents such as liquid do not ooze out from the boundary portion, unlike the packaging bag of the prior art.
As in the case of the example shown in FIG. 13, a heat exchanger 44 such as a heat pipe can also be used as the configuration of the cooling unit 43 in addition to providing the flow path 42 through which the refrigerant flows.
[0030]
FIG. 15 is a schematic diagram illustrating another example of the main part of the manufacturing method and the manufacturing apparatus of the packaging bag having the self-closing spout of the present invention.
In this example, the cooling part 43 is provided in a part corresponding to the non-heat seal part of the spout passage between the heating parts 21 and 21 of the heat seal head of the part forming the spout of the packaging bag, and the heating part 21. The Peltier element 45 is provided between the cooling unit 43 and the cooling unit 43. At this time, the surface of the heating unit 21 facing the cooling unit 43 and the heat generating surface 46 of the Peltier element 45 are in contact with each other, and the surface of the cooling unit 43 facing the heating unit 21 and the heat absorbing surface 47 of the Peltier element 45 are in contact. . Moreover, in the heat seal surface, the side surfaces of the cooling unit 43 and the heating unit 21 are in contact with each other so that there is no level difference. The cooling unit 43 is made of plastic or ceramics having excellent heat insulation and heat resistance, as in the example shown in FIGS.
[0031]
Moreover, in order to balance heat insulation, heat resistance, and strength, the cooling unit 43 may be made of a plurality of resins. The plurality of resins can be formed in multiple layers in parallel with the flow path 42 or partially different resins can coexist. On the pressure part 23 where the heating part 21 and the cooling part 43 of the heat seal head face each other, a glass cloth in which an elastic pressing member 24 made of silicone rubber or the like, impregnated and baked with Teflon, and coated with a silicone adhesive on one side A base material 25, plastic films 26 and 26 constituting a packaging bag, and a glass cloth base material 27 provided with a Teflon sheet layer on the surface are sequentially placed, the heat seal head is clamped, and the heating unit 21 and the pressure unit 23 are placed. Thus, the plastic films 26 and 26 are heated and pressurized to heat-seal and form a spout.
[0032]
In this example, when a current flows through the Peltier element 45, the temperature of the heat generating surface 46 rises and heats the heating unit 21. When the temperature of the heating part 21 does not reach the temperature necessary for heat sealing the plastic film constituting the packaging bag, the temperature necessary for forming the heat sealing part can be obtained by using a heater as appropriate. . On the other hand, the temperature of the cooling part 43 in contact with the endothermic surface 47 is lowered and does not reach the temperature necessary for heat sealing, so that a non-heat sealing part of the spout passage is formed. On the heat sealing surface, the heating parts 21 and 21 and the cooling part 43 of the heat sealing head are provided without any step, so that the heat sealing part and the non-heat sealing part of the spout are uniformly added even at the boundary. In the unopened state, as shown in FIG. 3 (A), the film inner surface side surface constituting the non-heat seal portion side of the boundary portion between the spout passage heat seal portion and the non-heat seal portion is pressed. They are in contact with each other and have no gaps.
[0033]
Further, the cross-sectional shape of the slice cut out from the spout is a straight curve or a smooth curved line convex toward the inner surface as seen in FIG. An angle α formed by a tangent line with the boundary portion A of the heat seal portion 6 as a base point is also 20 degrees or less. Therefore, in this packaging bag, contents such as liquid do not ooze out from the boundary portion, unlike the packaging bag of the prior art.
[0034]
FIG. 16 is a schematic diagram illustrating another example of the main part of the method and apparatus for manufacturing a packaging bag having a self-closing spout according to the present invention.
In this example, in the apparatus of FIG. 12, a gap 49 is provided between the heating part 21 of the heat seal head and the cooling part 43 through which the refrigerant is passed by providing the flow path 42. As shown in FIG. 16, the gap 49 has a small dimension (usually about 0.01 to 1 mm) at which the plastic film to be heat sealed does not bite and deform at the surface portion in contact with the plastic film. In order to prevent movement of heat from the heating unit 21 to the cooling unit 43 inside, it is preferable to have a large size.
[0035]
In the apparatus of FIG. 12, the heating unit 21 and the cooling unit 43 are in contact with each other, and since the amount of heat transferred from the heating unit 21 to the cooling unit 43 is large, sufficient heat sealing is performed in the heating unit 21; In order to prevent heat sealing from being performed in the cooling unit 43, it is necessary to use a material having a low thermal conductivity, such as plastic or ceramics having excellent heat insulation, as a material constituting the cooling unit 43. is there. On the other hand, in this example, by providing the gap 49 between the heating unit 21 and the cooling unit 43, it becomes possible to suppress the movement of heat from the heating unit 21 to the cooling unit 43. Like 21, it can be made of a metal such as an aluminum alloy. In the case where the cooling unit 43 is made of metal, the processing becomes easier and the durability is improved as compared with plastics and ceramics, so that the cost can be reduced and the productivity can be improved.
[0036]
The other configuration of this apparatus is the same as that of the apparatus shown in FIG. 12, and an elastic pressing member 24 made of silicone rubber or the like and Teflon are provided on the pressure unit 23 facing the heating unit 21 and the cooling unit 43 of the heat seal head. A glass cloth base material 25 impregnated and baked and coated with a silicon-based adhesive on one side, plastic films 26 and 26 constituting a packaging bag, and a glass cloth base material 27 provided with a Teflon sheet layer on the surface are sequentially placed. The heat sealing head is clamped and the plastic films 26 and 26 are heated and pressurized by the heating unit 21 and the pressurizing unit 23 to heat-seal, thereby forming a spout. A heat insulating member 50 is provided above the heating unit 21 and the cooling unit 43 of the heat seal head.
[0037]
In this example, similarly to the example shown in FIG. 12, the portion pressurized by the cooling unit 43 does not reach the temperature necessary for heat sealing, and thus a non-heat sealing portion of the spout passage is formed. By forming the spout in this way, the inner surface of the film constituting the non-heat seal portion side of the boundary between the spout passage heat seal portion and the non-heat seal portion can be seen in FIG. As can be seen, they are in contact with each other in an unopened state and do not have a gap.
[0038]
Further, the cross-sectional shape of the slice cut out from the spout is a straight curve or a smooth curved line convex toward the inner surface as seen in FIG. An angle α formed by a tangent line with the boundary portion A of the heat seal portion 6 as a base point is also 20 degrees or less. Therefore, in this packaging bag, contents such as liquid do not ooze out from the boundary portion, unlike the packaging bag of the prior art.
As in the case of the example shown in FIG. 13, a heat exchanger 44 such as a heat pipe can also be used as the configuration of the cooling unit 43 in addition to providing the flow path 42 through which the refrigerant flows. Further, a gap 49 may be provided between the heating unit 21 and the cooling unit 43 of the heat seal head in the apparatus in which the cooling unit 43 shown in FIG. 14 is provided via the elastic material 48.
[0039]
FIG. 17 is a schematic view showing another example of the main part of the manufacturing method and the manufacturing apparatus of the packaging bag having the self-closing spout of the present invention.
In this example, in the apparatus of FIG. 16, the heating unit 21 and the cooling unit 43 of the heat seal head are integrally formed of one member such as metal. By integrally configuring the heating unit 21 and the cooling unit 43, there are advantages such as easy assembly of the heat seal head and easy management of the head height.
[0040]
When the heating unit 21 and the cooling unit 43 are integrally formed of a metal material, the amount of heat transferred from the heating unit 21 to the cooling unit 43 increases, so that the surface of the heating unit 21 is brought to a temperature necessary for heat sealing. To keep it, it is necessary to use a larger heater. At that time, in order to suppress the movement of heat from the heating unit 21 to the cooling unit 43, a groove 51 is provided to reduce the cross-sectional area of the heat transfer path from the heating unit 21 to the cooling unit 43, and It is preferable to improve the heating / cooling efficiency by increasing the length. The dimension, shape, and number of the grooves 51 can be set as appropriate.
[0041]
The packaging bag manufacturing method and manufacturing apparatus described in each of the above examples are suitably used for manufacturing a packaging bag having a self-closing spout after opening.
Moreover, these manufacturing methods and manufacturing apparatuses can also be used for manufacturing a packaging bag having a spout for taking out the contents filled in a bag such as a refilling pouch. In this case, for example, as shown in FIG. 6, it is possible to reduce distortion, unevenness, etc. at the boundary between the heat seal part and the non-heat seal part generated by the conventional manufacturing method and manufacturing apparatus, and the appearance is excellent. It is possible to manufacture packaging bags with high commercial value.
[0042]
As the plastic film constituting the packaging bag having the spout of the present invention, a single-layer film made of a thermoplastic resin having heat sealability, these thermoplastic resin films having heat sealability as the inner layer of the bag, other A laminated film having a layer configuration of two or more layers in which films are laminated can be used.
Examples of the thermoplastic resin film having heat sealability include polypropylene, propylene-ethylene copolymer, crystalline polybutene-1, crystalline poly-4-methylpentene-1, low-, medium-, or high-density polyethylene, wire Low density polyethylene, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-ethyl acrylate copolymer (EEA), ion-crosslinked olefin copolymer (ionomer), etc. Polyolefins; Aromatic vinyl copolymers such as polystyrene and styrene-butadiene copolymers; Halogenated vinyl polymers such as polyvinyl chloride and vinylidene chloride resins; Acrylonitrile-styrene copolymers, Acrylonitrile-styrene-butadiene copolymers Nitrile polymers such as: Nylon 6, Niro 66, polyamides such as para or metaxylylene adipamide; polyesters such as polyethylene terephthalate, polybutylene terephthalate, polytetramethylene terephthalate, poly-1,4-cyclohexanedimethylene terephthalate, polyethylene naphthalate; various polycarbonates; poly Mention may be made of thermoplastic resins such as polyacetals such as oxymethylene.
[0043]
Particularly preferred materials include, for example, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, polypropylene, propylene-ethylene copolymer, ethylene-vinyl acetate copolymer, ethylenically unsaturated carboxylic acid or its An olefin resin such as an olefin resin graft-modified with an anhydride, an ionomer resin, a polyamide or copolyamide resin having a relatively low melting point or a low softening point, or a polyester or copolyester resin is used.
[0044]
When using a laminated film as the plastic film that constitutes the packaging bag, the thermoplastic resin film having the heat sealability described above is used as the inner layer of the bag, and another film is laminated via an adhesive layer as necessary. Use the laminated film. The adhesive layer is selected from polyethyleneimine resin, alkyl titanate resin, polyester-isocyanate resin, urethane resin, epoxy resin, polyether resin, olefin resin introduced with polar groups, etc. Use resin.
[0045]
There is no restriction | limiting in particular as a film laminated | stacked with a heat sealable resin, What is normally used for a packaging bag can be used. As a material suitable for such a film, any of the materials used as the heat-sealable resin can be used, but it is preferable to select a resin having a higher melting point than the resin used for the inner layer.
Moreover, what laminated | stacked 1 type (s) or 2 or more types of said plastic films and metal foil, such as aluminum, paper, a cellophane, etc. can also be used as another film. In particular, in the case of contents that require gas barrier properties, a resin layer having a resin layer such as polyvinylidene chloride resin, EVA saponified product, nylon or cyclic olefin copolymer, or a metal oxide deposited film such as aluminum or silicon oxide. It is preferable to use a laminated film including a resin layer containing a clay mineral and a metal foil such as aluminum.
In order to give heat insulation and rigidity to the film constituting the packaging bag, it is also possible to use a film made of various synthetic resin foams, such as alumina, silica, titanium oxide, calcium carbonate, carbon, talc, etc. Films made of various synthetic resins kneaded with inorganic substances and glass fibers can also be used.
[0046]
As a layer structure of the laminated film suitable for constituting the packaging bag of the present invention, biaxially stretched polyethylene terephthalate (PET: outer layer) / unstretched linear low density polyethylene (LLDPE: inner layer), biaxially stretched nylon (outer layer) ) / LLDPE (inner layer), biaxially stretched PET (outer layer) / aluminum foil (intermediate layer) / LLDPE (inner layer), biaxially stretched nylon (outer layer) / aluminum foil (intermediate layer) / LLDPE (inner layer), biaxially stretched PET (outer layer) / biaxially stretched nylon (intermediate layer) / LLDPE (inner layer), biaxially stretched PET (outer layer) / aluminum foil (intermediate layer) / biaxially stretched nylon (intermediate layer) / LLDPE (inner layer), etc. It is done.
For applications that require high temperature treatment such as pressure heat treatment, biaxially stretched PET (outer layer) / aluminum foil (intermediate layer) / unstretched polypropylene (PP: inner layer), biaxially stretched PET (outer layer) / Biaxially stretched nylon (intermediate layer) / aluminum foil (intermediate layer) / unstretched PP (inner layer), biaxially stretched PET (outer layer) / unstretched PP (inner layer), biaxially stretched nylon (outer layer) / unstretched PP (Inner layer), biaxially stretched nylon (outer layer) / aluminum foil (intermediate layer) / unstretched PP (inner layer), inorganic oxide deposited biaxially stretched PET (outer layer) / unstretched PP (inner layer), inorganic oxide deposited 2 A laminated film using unstretched PP for the inner layer, such as axially stretched nylon (outer layer) / unstretched PP (inner layer), can be used. Adhesive layers selected from the above adhesive resins are provided between the layers of these laminated films.
[0047]
Whether the plastic film is a single layer or what kind of layer configuration it may be selected according to the properties of the contents to be filled in the packaging bag. The plastic film can be produced by an ordinary method such as a casting method, a T-die method, a calendar method, or an inflation method. The laminated film can be produced by a conventional method such as dry lamination of a preformed film, coating on a substrate film, melt coextrusion.
[0048]
Next, specific examples of the packaging bag of the present invention will be described, but the following specific examples do not limit the present invention.
18 to 22 are views showing an example in which the present invention is applied to a standing pouch, FIG. 18 is a perspective view of the pouch, and FIG. 19 is a schematic cross-sectional view showing a state in which the pouch of FIG. 18 is filled with contents. FIG. 20 is a schematic sectional view showing a use state of the pouch of FIG. FIGS. 21 and 22 are partially enlarged schematic views of the metering chamber and the spout when the pouch of FIG. 18 is used. FIG. 21 shows a state in which the spout is closed. FIG. 22 shows the spout opened. It is a figure which shows a state. 21 and 22, (A) is a schematic cross-sectional view of the metering chamber and the spout, and (B) is a diagram showing the state of the contents in the valve (center portion) and the spout, respectively.
As the pouch body material, a laminated film in which a biaxially stretched nylon film having a thickness of 15 μm and a linear low density polyethylene having a thickness of 130 μm were laminated with a urethane adhesive from the outer layer was used. (Adhesive layer thickness: 4 μm)
[0049]
In this standing pouch 1, a branch chamber 16 having a spout 3 and a metering chamber 7 at the tip is formed by extending the side wall of the pouch outward at a position below the top 15 of the pouch. Inside the branch chamber 16, a film-like valve 9 is heat-sealed to the side wall members 11 and 12 at the upper end portion 13 and the lower end portion 14, thereby partitioning the storage chamber 8 and the metering chamber 7. By providing an unsealed portion 10 at the center of the lower end portion 14 of the valve 9, the storage chamber 8 and the metering chamber 7 are configured to communicate with each other.
[0050]
In this standing pouch, after filling the pouch from the top 15 of the pouch, the top 15 is heat sealed to seal the pouch. In order to use this pouch, for example, when the pouch is inverted by engaging an engagement hole 17 provided in the bottom of the pouch with a locking tool such as a hook 18 (see FIG. 20), the contents are contained in the branch chamber 16. Into the metering chamber 7 and passes through the unsealed portion 10 of the valve 9 to be filled into the metering chamber 7. If the internal pressure of the storage chamber 8 at this time is Po and the internal pressure of the fixed amount chamber 7 is P, then P ≦ Po. In addition, the packaging material constituting the pouch 1 is bent in a V shape by the pressure of the liquid content along the heat seal portion 2 at the connection portion of the spout 3 with the fixed-quantity chamber 7 and closely contacts the side walls facing the spout. Therefore, even after opening the tip of the spout 3 by adjusting the length and width of the spout 3, the spout 3 has a self-closing property, and contents such as liquid do not flow out.
[0051]
In order to take out contents such as liquid from the pouch 1, as shown in FIG. 22, after opening the tip of the spout 3, the metering chamber 7 is pressed by hand or a jig. At this time, the spout 3 is not broken, so the spout 3 is opened and the contents such as liquid are poured out.
At that time, P> Po and the contents such as liquid try to flow backward from the metering chamber 7 to the storage chamber 8 (FIG. 22B), but the unsealed portion 10 of the valve 9 is closed. The backflow of the contents is prevented, and all the contents in the quantification chamber 7 are poured out from the spout 3, so that the stability of the pouring and the excellent quantitativeness can be ensured. When the pressing of the metering chamber 7 is stopped, the contents again pass from the storage chamber 8 through the unsealed portion 10 of the valve 9 and is filled into the metering chamber 7, and the packaging material constituting the pouch 1 is poured by the pressure of the contents. The spout 3 is closed by being bent into a V-shape at the connecting portion between the outlet 3 and the metering chamber 7 so that the opposing side walls of the spout 3 are brought into close contact with each other.
[0052]
The standing pouch 1 uses the manufacturing apparatus shown in FIGS. 9 to 17 to specify the cross-sectional shape of the self-closing spout and the cross-sectional shape of the section cut out from the spout according to the present invention. Even if the spout is hung with the spout down after the spout is opened, the contents such as the liquid stored in the bag are prevented from exuding little by little from the spout.
[0053]
FIG. 23 is a diagram showing an example in which the present invention is applied to a flat pouch. In this example, when the pouch 31 having the self-closing spout 33 at the tip is formed by heat-sealing the peripheral edge portion 32 of the plastic film, the plastic film is heat-sealed across the width direction of the pouch 31. Partitioning portions 34 and 34 and second partitioning portions 35 and 35, and the inside of the pouch is partitioned into a storage chamber 38, a buffer chamber 36 communicating with the storage chamber 38, and a metering chamber 37 connected to the spout 33. is there.
This flat pouch 31 uses the manufacturing apparatus shown in FIGS. 9 to 17 to specify the cross-sectional shape of the self-closing spout and the cross-sectional shape of the slice cut out from the spout according to the present invention. Even if the spout is hung with the spout down after the spout is opened, the contents such as the liquid stored in the bag are prevented from exuding little by little from the spout.
[0054]
In the standing pouch 1 of FIGS. 18 to 22 described above, the metering chamber 7 is formed above the spout 3 by the film-shaped valve 9, but in this pouch 31, the spout is formed by the first partition portions 34 and 34 by heat sealing. A quantification chamber 37 is formed above 33. In order to take out the contents such as liquid from the pouch 31, the knob 40 provided at the tip of the pouch is pinched with a finger and the tip of the spout 33 is opened along the easy opening portion 41 such as a perforation. The quantitative chamber 37 is pressed by hand or a jig, and the contents such as liquid are poured out.
At that time, the contents such as the liquid try to flow backward from the metering chamber 37 toward the storage chamber 38, and this reverse flow can be largely prevented by the first partition portions 34 and 34.
[0055]
In this pouch 31, by providing a second partition part 35, 35 by heat sealing at the upper part of the first partition part 34, 34, a buffer chamber 36 is formed between the metering chamber 37 and the storage chamber 38. In addition, it is possible to prevent the contents such as the liquid from flowing backward from the metering chamber 37 to the storage chamber 38 during the dispensing. Further, the buffer chamber 36 prevents the pouch 31 from being deformed in the vicinity of the liquid passage 39 due to the narrow liquid passage 39 formed by the first partition portions 34, 34 in the pouch 31. It becomes possible.
[0056]
FIG. 24 is a diagram showing another example in which the present invention is applied to a flat pouch.
In the pouch of FIG. 23, the first partition portions 34 and 34 and the second partition portions 35 and 35 are formed from both sides of the pouch toward the central portion of the pouch. In this pouch 31, the first partition portion 34 is formed. Is formed by heat sealing from one side of the pouch toward the opposite side of the pouch, and the second partition portion 35 is provided on the opposite side of the first partition portion 34, whereby the inside of the pouch is stored in the storage chamber 38, the storage chamber. 38 is divided into a buffer chamber 36 communicating with 38 and a quantitative chamber 37 connected to the spout 33.
Other configurations and usage methods of the pouch 31 are the same as those of the pouch of FIG.
[0057]
In the flat pouch 31 of FIGS. 23 and 24 described above, an example in which the inside of the pouch 31 is partitioned into a storage chamber 38, a buffer chamber 36, and a metering chamber 37 by providing a first partition portion and a second partition portion has been described. However, it goes without saying that the pouch may be provided with only the first compartment, and the pouch may be divided into two compartments, a storage chamber and a metering chamber.
In addition, the dimensions and shapes of the first partition part and the second partition part can be appropriately selected according to the contents such as the liquid stored in the pouch, the dimensions, the material, etc. of the pouch.
[0058]
There are no particular restrictions on the contents of the liquid or the like stored in the packaging bag of the present invention, and any liquid or gel-like items such as liquid detergent, shampoo, rinse, disinfectant, soy sauce, sauce, ketchup should be stored appropriately. Can do.
[0059]
【The invention's effect】
According to the present invention, even when the spout is hung down after opening the spout, the contents such as the liquid stored in the bag can be prevented from oozing out little by little. A packaging bag having a closing spout can be obtained. Moreover, according to the manufacturing method and manufacturing apparatus of this invention, the packaging bag which has said self-closing pouring spout can be manufactured easily. Furthermore, according to the manufacturing method and the manufacturing apparatus of the present invention, it is possible to reduce the distortion, unevenness, etc. of the boundary between the heat seal part and the non-heat seal part in the packaging bag having the spout for taking out the contents from the bag. .
[Brief description of the drawings]
FIG. 1 is a view showing a spout of a packaging bag of the present invention.
FIG. 2 is a view showing a cross-sectional shape of a spout passage of the packaging bag of FIG.
FIG. 3 is a partial enlarged schematic view of a portion X in FIG. 2;
4 is a schematic cross-sectional view showing a cross-sectional shape of a section cut out from the spout of the packaging bag of FIG. 1 perpendicular to the spout passage. FIG.
5 is a schematic cross-sectional view showing a cross-sectional shape of a section cut out perpendicularly to the spout passage from the spout of the packaging bag of FIG. 1. FIG.
FIG. 6 is a schematic view showing a main part of a conventional manufacturing apparatus for a packaging bag having a self-closing spout.
7 is a diagram illustrating a state in which a packaging bag is heat-sealed using the apparatus of FIG. 6. FIG.
FIG. 8 is a schematic cross-sectional view showing a cross-sectional shape of a section cut out perpendicularly to a spout passage from a spout of a conventional packaging bag.
FIG. 9 is a schematic view showing an example of a main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 10 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 11 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 12 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 13 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 14 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 15 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 16 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 17 is a schematic view showing another example of the main part of the method and apparatus for manufacturing a packaging bag of the present invention.
FIG. 18 is a diagram showing an example in which the present invention is applied to a standing pouch.
19 is a schematic cross-sectional view showing a state in which the pouch of FIG. 18 is filled with contents.
20 is a schematic cross-sectional view showing a usage state of the pouch of FIG.
21 is a partially enlarged schematic view showing a usage state of the pouch of FIG. 18. FIG.
22 is a partially enlarged schematic view showing a usage state of the pouch of FIG. 18. FIG.
FIG. 23 is a diagram showing an example in which the present invention is applied to a flat pouch.
FIG. 24 is a diagram showing another example in which the present invention is applied to a flat pouch.
[Explanation of symbols]
1, 31 Packaging bags
2, 32 Heat seal part
3, 33 spout
4 Outlet passage
5 Outlet section
6 Non-heat seal part
7, 37 Determination chamber
8,38 Storage room
9 valves
10 Unsealed part
11, 12 Side wall member
13 Upper end of valve
14 Lower end of valve
15 Top
16 Branch room
17 engagement hole
18 hook
21 Heating unit
22 Non-pressing part
23 Pressurizing part
24 Elastic pressing member
25, 27 Glass cloth substrate
26 Plastic film
28 Non-heatable pressing member
29 sheet metal
30 gap
34 First compartment
35 Second compartment
36 Buffer room
39 Liquid passage
40 knobs
41 Easy opening part
42 channels
43 Cooling section
44 heat pipe
45 Peltier element
46 Heat generation surface
47 Endothermic surface
48 Spring
49 gap
50 Insulation member
51 groove

Claims (10)

When a plastic bag constituting a packaging bag is heat-sealed by sandwiching between glass cloth substrates and a packaging bag having a spout formed by a heat-sealed part and a non-heat-sealed part is manufactured, the heating part of the heat-seal head is poured. A non -pressing portion is provided at a portion corresponding to the non-heat sealing portion of the outlet passage, and an elastic pressing member, a metal thin plate, a glass cloth base material, a plastic film, and a glass cloth base are provided on the pressing portion facing the heating portion of the heat seal head. A method for producing a packaging bag, comprising: sequentially placing materials; clamping a heat seal head; and heating and pressing a plastic film with a heating unit and a pressurizing unit . When a plastic bag constituting a packaging bag is heat-sealed by sandwiching between glass cloth substrates and a packaging bag having a spout formed by a heat-sealed part and a non-heat-sealed part is manufactured, the heating part of the heat-seal head is poured. Using a heat seal head with a cooling part so that there is no step on the heat seal surface when the heat seal head is clamped at the part corresponding to the non-heat seal part of the exit passage , A method for producing a packaging bag, characterized by heat-sealing. The manufacturing method according to claim 2, wherein a cooling part is provided via an elastic member at a portion corresponding to the non-heat sealing part of the spout passage of the heating part of the heat seal head . The manufacturing method according to claim 2 , wherein a gap is provided between a heating part and a cooling part of the heat seal head. The manufacturing method according to claim 2 , wherein the heating part and the cooling part of the heat seal head are constituted by one member, and a gap is provided between the heating part and the cooling part . In a packaging bag manufacturing apparatus in which a plastic film constituting a packaging bag is sandwiched between glass cloth substrates and heat sealed, and a spout is formed by a heat seal part and a non-heat seal part, the spout of the heating part of the heat seal head The non-pressing portion is provided at a portion corresponding to the non-heat sealing portion of the passage, and the elastic pressing member, the metal thin plate, and the glass cloth base material are sequentially placed on the pressing portion facing the heating portion of the heat seal head. Packaging bag manufacturing equipment. In a packaging bag manufacturing apparatus in which a plastic film constituting a packaging bag is sandwiched between glass cloth substrates and heat sealed, and a spout is formed by a heat seal part and a non-heat seal part, the spout of the heating part of the heat seal head An apparatus for manufacturing a packaging bag, characterized in that a cooling portion is provided at a portion corresponding to a non-heat seal portion of a passage so that there is no step on the heat seal surface when the heat seal head is clamped . The manufacturing apparatus according to claim 7 , wherein a cooling unit is provided via an elastic member at a portion corresponding to the non-heat sealing unit of the spout passage of the heating unit of the heat seal head . The manufacturing apparatus according to claim 7 or 8, wherein a gap is provided between a heating part and a cooling part of the heat seal head . The manufacturing apparatus according to claim 7 , wherein the heating unit and the cooling unit of the heat seal head are configured by a single member, and a gap is provided between the heating unit and the cooling unit .

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