JP2004359346A - Gusset type bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gusset type bag which has is made of a polypropylene resin, and produced by forming a coextruded multi-layer laminated resin film including polypropylene resin layers excellent in various characteristics, by an upward facing air-cooled inflation molding method to thereby use the resultant coextruded multi-layer laminated resin film as a heat sealing resin layer. <P>SOLUTION: In the gusset type bag, the heat sealing resin layer is formed of the coextruded multi-layer laminated resin film which is composed of at least the single polypropylene resin layer, a mixed resin layer containing the polypropylene resin and a polyethylene resin, laminated on a single or both sides of the polypropylene resin layer, and a polyethylene resin layer laminated on a single or both sides of the mixed resin layer. According to the composition of the coextruded multi-layer laminated resin film, the polypropylene resin forming the polypropylene resin layer or the mixed resin layer is the one excellent in melt tension and extensibility. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a gusset-type bag, and more specifically, a heat-sealing resin layer comprising a polyethylene-based resin and a polypropylene-based resin layer, and having excellent transparency, and opening, blocking resistance, and slipping. Excellent in properties, stiffness, rigidity, impact resistance, etc. In addition, excellent in flexibility, heat seal properties, laminate properties, etc., suitable for filling and packaging of contents, and high-speed film forming The present invention relates to a gusset-type bag using a co-extruded multilayer laminated resin film which can be formed, has excellent film-forming stability, and has low curling properties.

Conventionally, various foods and drinks such as food and drink, fruit juice, juice, drinking water, sake, cooked food, fish paste product, frozen food, meat product, boiled rice cake, liquid soup, seasoning, etc., liquid Various types of plastic soft packaging bags have been developed and proposed for filling and packaging chemical products such as detergents, cosmetics, pharmaceuticals, sundries, industrial materials, and other articles. Finally, so-called gusset-type bags are known.
Thus, the gusset-type bag is self-supporting, has an excellent appearance effect at the store as a shape-retaining container, and has a workability at the time of filling the contents, a handleability at the time of distribution, and the like. In addition, it is lightweight, non-bulky, inexpensive, and has various other advantages. In recent years, it has a spout or the like in its opening to fill and package juice, fruit juice, etc. It is extremely useful as a container for use, and its demand is increasing.

By the way, the above-mentioned gusset-type bag comprises a front plate provided with a heat-sealing resin layer on the inner surface side and a rear plate provided with a heat-sealing resin layer on the inner surface side. A heat-sealing resin layer is provided on the inner surface between the left and right ends of the front plate and the rear plate, and the heat-sealing resin layer is bent inward. The left and right plates having a V-shaped cross section, and the surface of the heat-sealing resin layer is formed on the inner surface of the front plate and the rear plate. The left and right ends, the lower end, and the upper and lower ends, where the front plate, the rear plate, the left plate, and the right plate overlap each other, are heat-sealed. The opposite surfaces of the conductive resin layer are heat-sealed, and the left and right side seals are formed at the left and right end portions, the lower end portion, and the upper end portion. Parts, Sokoshi - Le portions, and left and right upper sheet - to form a top opening to form a pole tip, but that bag making the gusset type bag made of a variety of forms.
Thus, as one of the materials constituting the heat-sealing resin layer, a polypropylene-based resin is used instead of the polyethylene-based resin, and its film or sheet, or its coating or printing is used. It is known to form a heat-sealing resin layer with a film or the like. In general, the method for forming the above-mentioned polypropylene resin film or sheet constituting the above heat-sealing resin layer includes the following (1). Inflation molding method (tube molding method), (2). There is a T-die molding method (cast molding method), which is further divided into a method of producing a stretched film and a method of producing a non-stretched film depending on whether or not the film is stretched (for example, see Non-Patent Document 1).
In the above-mentioned method of forming a polypropylene resin film or sheet, as an inflation molding method, usually, a polypropylene resin is extruded into a cylindrical shape, and the formed film is cooled with water while being taken downward, thereby forming a film. In general, for example, an inflation molding method in which a molded film is cooled by an air-cooling method to form a film while being pulled upward, as in the case of a polyethylene resin, has been practically used. Not something.
As an example of the inflation molding method for a polypropylene resin film or sheet, one or both surfaces of the polypropylene resin layer (I) have a lower melting point than the polypropylene resin of the resin layer (I). In addition, there is a method for producing a polypropylene-based resin film, which comprises laminating an adhesive layer (II) made of a mixture of a polypropylene-based resin and a polyethylene-based resin by co-extrusion inflation molding. ).
Supervision, Kenkichi Murakami "Extrusion Molding" Issuance Office, Plastic Age Co., Ltd., publisher, Eiichi Asayama, November 10, 1963, first edition issued, October 20, 1976, revised 5th edition reprint , P. 121-123 JP-A-7-290566 (Claims, etc.)

The inflation molding method of the polypropylene-based resin film or sheet according to the above-described example involves a usual inflation molding method in which a molded film is cooled down with water while being drawn downward and formed into a film. This is different from the inflation molding method in which, as in the case of a polyethylene resin, for example, the formed film is cooled by an air cooling system while being pulled upward to form a film.
Thus, the reason that the inflation molding method of cooling the film by air cooling while forming the film upward while forming the film is not practically used is that the stability of the bubble made of the polypropylene resin to be taken is poor, and furthermore, This is because crystallization is excessively progressed because the molten resin is not rapidly cooled, and only an opaque and brittle film is obtained, and it is difficult to stably form a uniform film for a long time.
The present inventors used a polypropylene-based resin for the heat-sealing resin layer, and cooled the film by air cooling while forming the film upward to form a film. Tried to produce a co-extruded multilayer laminated resin film containing a layer, but the resulting co-extruded multilayer laminated resin film lacks transparency, and has opening properties, blocking resistance, sliding properties, impact resistance, and others. In addition, it is inferior in heat seal properties, laminate properties, etc., lacks suitability for filling and packaging the contents, lacks curling properties, and constitutes a heat seal resin layer. In fact, it is impossible to form a co-extruded multilayer laminated resin film of a tubular shape containing a desired polypropylene-based resin layer.
Therefore, the present invention can be formed into a film by an inflation molding method in which a polypropylene-based resin is used, and the formed film is cooled by an air cooling method while being pulled upward, and formed into a film. It has good openability, blocking resistance, slip resistance, stiffness / rigidity, impact resistance, etc., and also has excellent flexibility, heat seal properties, laminate properties, etc. It is suitable for filling and packaging, is capable of high-speed film formation, has excellent film formation stability, and has a film-forming co-extruded multilayer laminated resin film containing a polypropylene resin layer with low curling properties. Another object of the present invention is to provide a gusset-type bag using this as a heat-sealing resin layer.

  The inventor of the present invention has proposed an inflation molding method of forming a polypropylene-based resin film by forming the film while pulling the formed film upward, using an inexpensive air-cooling system, similarly to the case of the polyethylene-based resin. As a result of various investigations, we focused on utilizing the inflation moldability of polyethylene-based resin, which was formed into a film while pulling the molded film upward using an air cooling method. First, a heat-sealing resin layer was formed. As a resin forming at least one layer, a polypropylene-based resin having excellent melt tension and stretchability is used, and as the resin constituting the other layers, the polypropylene-based resin having excellent melt tension and stretchability described above and polyethylene are used. Molded using air-cooled method, using resin mixed with base resin, and as resin constituting other layers Using a polyethylene resin excellent in inflation moldability, which forms a film while taking up the film upward, the above-mentioned polypropylene resin, a mixed resin of a polypropylene resin and a polyethylene resin, and polyethylene Inflation in which a resin is melt-extruded into a multilayer using, for example, a plurality of extruders and a multilayer circular die, and the multilayer molded film is upwardly formed by an air cooling method to form a film. Inflation film formation using a molding method, at least one layer constituting the co-extruded multilayer laminated resin film is composed of a polypropylene resin layer of a polypropylene resin having excellent melt tension and stretchability. On one or both sides of the polypropylene resin layer, a polypropylene resin with excellent melt tension and A co-extruded multi-layer laminated resin film is formed by laminating a mixed resin layer of a mixed resin with a styrene resin, and further laminating a polyethylene resin layer of a polyethylene resin on one or both surfaces of the mixed resin layer. Then, the co-extruded multilayer laminated resin film is used as a heat-sealing resin layer, and the co-extruded multilayer laminated resin film and at least a base film are laminated to produce a laminated material. Thus, using the laminated material, a front plate and a rear plate, which constitute a gusset-type bag, are prepared from the laminated material, and the co-extrusion as a heat-sealing resin layer is performed. The multi-layer laminated resin film is arranged so that the surfaces thereof face each other, and further, from the above-mentioned laminated material, a left side plate and a right side plate each having a V-shaped cross section bent inward to form a gusset-type bag are prepared in the same manner as described above. And the left side plate The right side plate is placed between the left and right ends of the front plate and the rear plate, and the surface of the co-extruded multilayer laminated resin film as a heat-sealing resin layer is placed between the front plate and the rear plate. The co-extruded multilayer laminated resin film as a heat-sealing resin layer provided on the inner surface is disposed so as to face the surface, and then the left and right ends of the front plate, the rear plate, the left plate, and the right plate overlap with each other. The left and right ends of the lower end and the upper end are heat-sealed between the opposing surfaces of the co-extruded multilayer resin film as the heat-sealing resin layer, and the left and right ends thereof are A left and right side seal portion, a bottom seal portion, and a left and right upper end seal portion are formed at the left and right end portions of the lower end portion and the upper end portion, respectively, and a gusset type bag is formed by forming an upper end opening portion. Then, the gusset-type bag is filled with desired contents from its opening. When the packaging product is manufactured by the above, the polyethylene resin and the polypropylene resin are mutually melted in the layers of the co-extruded multilayer laminated resin film constituting the heat-sealing resin layer or between the layers, and the Due to compatibility, affinity, etc., both of them are firmly welded, and the polypropylene resin follows the inflation moldability of the polyethylene resin, which forms a film while pulling up the molded film using an air cooling method. The film can be formed by an inflation molding method in which the film is formed while the molded film using the air-cooling method is pulled upward, and the film can be formed at a high speed, and the film forming stability is excellent. Both the polyethylene resin and the polypropylene resin are extremely tightly and closely bonded in the layer or between layers, and exhibit the characteristics of both. Excellent in transparency, good in opening property, blocking resistance, sliding property, stiffness / rigidity, impact resistance, curling property, and other properties. In addition, flexibility and heat sealing properties It has been found that a very useful gusset-type bag having excellent laminating characteristics and the like and having suitability for filling and packaging various contents can be produced.

  That is, in the present invention, the heat-sealing resin layer is provided on the inner surface side of the front plate and the heat-sealing resin layer is provided on the inner surface side thereof. A heat-sealing resin layer is provided on the inner surface between the left and right ends of the front plate and the rear plate, and the V-shape is bent inward. The left side plate and the right side plate having the mold cross section face the heat sealable resin layer with the heat sealable resin layer provided on the inner surfaces of the front plate and the rear plate. Then, the left and right ends, the lower end, and the upper and lower ends where the front plate, the rear plate, the left side plate, and the right side plate overlap each other are placed on the heat-sealing resin layer. The opposite surfaces are heat-sealed, and the left and right side seals and the bottom seal are provided at the left and right end portions, the lower end portion and the upper end portion, respectively. Part, and in the gusset-type bag formed by forming an upper end opening part while forming a left and right upper end seal part, the heat sealable resin layer comprises a co-extruded multilayer laminated resin film, Further, at least one layer constituting the co-extruded multilayer laminated resin film is composed of a polypropylene resin layer, and further, a laminated resin layer of a polypropylene resin and a polyethylene resin is laminated on one or both surfaces of the polypropylene resin layer. Further, a polyethylene resin layer is laminated on one or both surfaces of the mixed resin layer, and the polypropylene resin constituting the above-mentioned polypropylene resin layer or the mixed resin layer is excellent in melt tension and stretchability. A gusset-type bag comprising a co-extruded multilayer laminated resin film formed of a polypropylene-based resin. .

In the present invention, as the heat-sealing resin layer constituting the innermost layer, the polyethylene resin and the polypropylene resin in the layer or between the respective layers are mutually melted, and their compatibility, affinity, etc. Both of them are welded firmly, and both the polyethylene resin and the polypropylene resin are extremely tightly adhered in the layer or between the layers, exhibiting the characteristics of both, and have excellent transparency and opening. Excellent in properties, blocking resistance, sliding properties, stiffness / rigidity, impact resistance, curling properties, and other properties, and also excellent in flexibility, heat sealing properties, laminating properties, etc. Since the coextruded multilayer laminated resin film is used, a very useful gusset-type bag having filling suitability for filling and packaging various contents can be produced.
Further, in the present invention, the above-mentioned co-extruded multilayer laminated resin film as the heat-sealing resin layer is formed by inflation molding of a polyethylene resin which is formed into a film while pulling the molded film upward using an air cooling method. In accordance with the properties, the polypropylene-based resin can be formed by an inflation molding method in which the film is formed while the molded film using the air-cooling method is drawn upward, and the high-speed film formation is possible, and It has the advantage of being excellent in film formation stability.

The present invention will be described in more detail below with reference to the drawings and the like.
First, FIGS. 1 and 2 are schematic cross-sectional views showing one example of the layer structure of the co-extruded multilayer laminated resin film according to the present invention, and FIGS. 3 and 4 are shown in FIGS. It is a schematic sectional drawing which shows an example of the layer structure about the laminated material which concerns on this invention manufactured using the co-extruded multilayer laminated resin film which concerns on this invention, FIG. 5 and FIG. FIG. 7 is a schematic perspective view showing the outline of the configuration of a gusset-type bag according to the present invention manufactured by using the laminated material according to the present invention and manufacturing the same, and FIG. It is a schematic perspective view which shows the outline of the structure about the packaging product which filled and packaged the content in such a gusset type bag.

  First, in the present invention, the co-extruded multilayer laminated resin film according to the present invention as a heat-sealing resin layer will be described. For example, the co-extruded multilayer laminated resin film according to the present invention is shown in FIG. As described above, first, a heat-sealing resin layer is formed into a film by a top-blowing air-cooling inflation method. At least one layer constituting the film 1 is composed of a polypropylene resin layer 2 made of a polypropylene resin, and a mixed resin layer 3 made of a mixed resin of a polypropylene resin and a polyethylene resin is formed on one surface of the polypropylene resin layer 2. A co-extruded multilayer laminate 5 in which a polyethylene resin layer 4 of polyethylene resin is laminated on one side of the mixed resin layer 3; Further, a co-extrusion multilayer laminate in which the polypropylene resin constituting the above-mentioned polypropylene resin layer 2 or the mixed resin layer 3 is formed of a polypropylene resin having excellent melt tension and stretchability to form a film. Resin film layer A can be mentioned.

As another example of the co-extruded multilayer laminated resin film according to the present invention, as shown in FIG. 2, first, a heat-sealing resin layer is formed by a top-blowing air-cooled inflation method. A co-extruded multilayer resin film 1a, and at least one layer constituting the co-extruded multi-layer resin film 1a comprises a polypropylene resin layer 2 of a polypropylene resin. On both surfaces of the polypropylene resin layer 2, mixed resin layers 3 and 3 made of a mixed resin of a polypropylene resin and a polyethylene resin are laminated, and on both surfaces of the mixed resin layers 3 and 3, a polyethylene resin It is composed of a co-extruded multilayer laminate 5a in which resin layers 4 and 4 are laminated. That the polypropylene resin include a coextruded multilayer laminated resin film A ₁ which is manufactured form a film composed of a high polypropylene resin melt tension and stretchability.

Next, in the present invention, a laminated material manufactured using the above-described co-extruded multilayer laminated resin film according to the present invention as a heat-sealing resin layer will be described. As shown in FIGS. 3 and 4, _first , using the co-extruded multilayer laminated resin films A and A1 according to the present invention as the heat-sealing resin layer shown in FIGS. After forming a printed pattern layer 12 made of, for example, desired characters, symbols, pictures, figures, etc. on the back surface of the desired base film 11 having a corona-treated surface or the like, a base including the printed pattern layer 12 is formed. The above-mentioned co-extruded multilayer laminated resin film A shown in FIG. 1 is laminated on the surface of the material film 11 with the surfaces of the polypropylene resin layer 2 constituting the co-extruded multilayer laminated resin film A facing each other. According to the present invention The laminated material B (FIG. 3) can be manufactured, or, similarly to the above, first, for example, desired characters, symbols, patterns, figure, after forming the printed pattern layer 12 made of other like, on the surface of the base film 11 containing the printed pattern layer 12, a coextruded multilayer laminated resin film a ₁ shown in FIG. 2 above, the co-extruded multi-layer The laminated material B ₁ (FIG. 4) according to the present invention can be manufactured by laminating the two polyethylene resin layers 4 constituting the laminated resin film A ₁ with the surfaces thereof facing each other.

In FIGS. 3 and 4, the reference numerals 1, 1a, 2, 3, 4, 5, 5a and the like mean the reference numerals 1, 1a, 2, 3, and 1 in FIGS. It has the same meaning as 4, 5, 5a and the like. The above examples illustrate the coextruded multilayer laminated resin film according to the present invention, and 12 examples of the laminated material, and the present invention is not limited thereto, and includes, for example, the laminated material according to the present invention. Can be arbitrarily laminated with another base material between the layers depending on the contents to be filled and packed, the packaging purpose, the packaging form, and the like.
Although not shown, a desired printed pattern layer or the like can be formed not only on the back surface of the base film but also on the front surface or both surfaces thereof.
Further, although not shown, instead of forming a printed pattern layer or the like on the base film as described above, a surface of a polypropylene-based resin layer or a polyethylene-based resin layer constituting the co-extruded multilayer laminated resin film according to the present invention is used. After forming a printed pattern layer composed of desired characters, symbols, pictures, figures, etc., a base film is laminated and laminated on the surface including the printed pattern layer, and the co-extruded multilayer according to the present invention is provided. The laminated material according to the present invention using the laminated resin film can also be manufactured.

Further, in the present invention, the co-extruded multilayer laminated resin film of the present invention constituting the heat-sealing resin layer makes use of the advantages of both by using a polyethylene resin and a polypropylene resin. The polyethylene-based resin layer mainly exhibits a heat sealing function, and the polypropylene-based resin layer exhibits a function as a core material. It is excellent in transparency and good in opening property, blocking resistance, sliding property, stiffness / rigidity, impact resistance, etc. In addition, it has excellent flexibility, heat seal properties, laminating properties, etc. Excellent coextruded multi-layer laminated resin film with excellent filling and packaging suitability for contents, high-speed film formation, excellent film formation stability, and low curling. Can be done.
Originally, polyethylene-based resin and polypropylene-based resin are inferior in mutual compatibility, affinity and the like, and it is said that it is difficult to co-extrude both. Due to the low melt tension, it is said that it is impossible to form a film by the inflation molding method in which the film is formed while pulling the molded film upward using an air cooling method, against the gravity. It is.
Thus, in the present invention, a polypropylene resin having excellent melt tension and stretchability is selected from a variety of polypropylene resins as a polypropylene resin, and this is combined with a polyethylene resin to form a polyethylene resin. It is possible to produce a multi-layer laminated heat-sealing resin layer having the advantages of the flexibility and heat-sealing properties of the resin and the strength, rigidity, strength and the like of polypropylene resin. That is.

  Further, in the above, at least the laminating method of laminating the base film and the co-extruded multilayer laminated resin film according to the present invention as a heat-sealing resin layer includes, for example, an adhesive for laminating and the like. And then laminating at least the base film and the co-extruded multilayer laminated resin film according to the present invention via the laminating adhesive layer. System, or an adhesive aid layer such as an anchor coat agent, a melt-extruded resin layer, and the like, and then an adhesive aid layer such as the anchor coat agent, a melt-extruded resin layer, and the like. At least, it can be performed by a melt extrusion lamination method or the like in which the base film and the co-extruded multilayer laminated resin film according to the present invention are laminated.

Next, in the present invention, the gusset-type bag according to the present invention will be described by using an example of the gusset-type bag according to the present invention using the above-described laminated material and manufacturing the gusset-type bag according to the present invention. As an example, a case of a gusset-type bag made by using the laminated material B shown in FIG. 3 will be described. First, as shown in FIGS. From the laminated material B, the front plate 21, the rear plate 22, the left side plate 23 which is bent inward and has a V-shaped cross section, and the same is bent inward similarly to constitute the gusset-type bag according to the present invention. A right side plate 24 having a V-shaped cross section is prepared, and then the above-mentioned front plate 21 and rear plate 22 are co-extruded as a heat-sealing resin layer. Films A, A are arranged with their faces facing each other, A co-extruded multilayer laminated resin film A as a heat-sealing resin layer is provided between the left side plate 23 and the right side plate 24 between the left and right ends of the front plate 21 and the rear plate 22. The surface A is arranged so as to face the surface of the co-extruded multilayer laminated resin film A as a heat-sealing resin layer provided on the inner surface of the front plate 21 and the rear plate 22 (FIG. 6). Then, the front plate 21, the rear plate 22, the left side plate 23, and the right side plate 24 overlap with each other, left and right side ends 25, 25, 25, 25, a lower end 26, and upper and lower left and right ends 27, 28 is heat-sealed between the opposing surfaces of the co-extruded multilayer laminated resin film A, A as the heat-sealing resin layer, and the left and right end portions 25, 25, 25 are formed. , 25, a lower end portion 26, and an upper end portion at left and right end portions 27, 28, respectively. The gusset-type bag according to the present invention is formed by forming the id seal portions 29, 29, 29, 29, the bottom seal portion 30, the right and left upper seal portions 31, 32 and the upper end opening portion 33. C can be made into a bag (FIG. 8).
In the present invention, the laminated material according to the present invention manufactured using the co-extruded multilayer laminated resin film according to the present invention shown in FIG. The gusset-type bag can be manufactured.
In the above description, the bottom seal part forming the zet-type bag, together with the bottom seal part, is a diagonal seal part connecting the left and right ends and the lower end, not shown. It can also be formed into a boat-shaped seal.

Thus, in the present invention, the gusset-type bag C according to the present invention manufactured as described above is used, and as shown in FIG. 7, the gusset-type bag C is opened from the opening 33 above the gusset-type bag C (see FIG. 6). For example, it is filled with various contents 34 such as food and drink, pharmaceuticals, reagents, chemicals, cosmetics, miscellaneous goods, and the like, and then the upper end of the upper opening 33 of the gusset-type bag C is removed. The upper seal portion 35 is formed by heat sealing, the opening 33 is closed, and a packaged product D using the gusset-type bag C according to the present invention can be manufactured. is there.
In FIG. 7, the reference numerals 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, and 33 mean the same as those in FIGS. 5 and 6 described above. , 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, and 33 have the same meaning.

The above-mentioned illustration is an example of the gusset-type bag according to the present invention, and the present invention is not limited to this.
For example, in the present invention, as shown in FIGS. 5 and 6, the front plate 21, the rear plate 22, the left side plate 23, the right side plate 24, and the like, which constitute the gusset-type bag according to the present invention, are formed as described above. Using the laminated material B, for example, utilizing a bag making method such as a vertical pillow type or a horizontal pillow type, and bending and forming these as a continuous integral body, before forming a gusset-type bag according to the present invention. A gusset-type bag according to the present invention can be manufactured by constructing a plate, a rear plate, a left side plate, and a right side plate, and then forming a bag in the same manner as described above.
In the present invention, although not shown, in the gusset-type bag according to the present invention, a spout with a cap capable of injecting the content into the opening at the upper end or sucking the content is provided. Can be attached.
At the lower end of the spout, for example, a blocking prevention member for preventing the bag from closing when sucking and eating the contents, or a straw for performing a straw function is integrally formed. A molded spout can also be used.
Further, although not shown, in the gusset-type bag according to the present invention, the female meshing portion and the male meshing portion are fitted to the inner surface thereof, and a resealable zipper tape or the like may be attached thereto. You can do it.
Although not shown, in the gusset-type bag according to the present invention, a boat-shaped seal is formed by diagonally sealing the left and right ends and the lower end, for example, as the bottom seal at the lower end. By doing so, the independence of the gusset-type bag can be improved.

Next, in the present invention, the materials constituting the co-extruded multilayer laminated resin film, the laminated material, the gusset-type bag and the like according to the present invention, the manufacturing method thereof, and the like will be described. The co-extruded multilayer laminated resin film according to the present invention as a resin layer will be described first. As the polypropylene resin having excellent melt tension and stretchability for forming the mixed resin layer, basically, a polypropylene homopolymer or a copolymer of propylene and an α-olefin such as ethylene can be used, Further, as the above copolymer, a block copolymer, or a random and a polymer may be used. Kill.
Thus, in the present invention, as the polypropylene resin having excellent melt tension and stretchability, the high-pressure method low-density polyethylene having long-chain branching has the same structure as the polypropylene resin having a high melt tension. It is possible to use a material in which a long chain branch is introduced to increase the tension in a molten state.
In the present invention, specifically, as the polypropylene resin having excellent melt tension and stretchability, propylene and ethylene, or a block copolymer of propylene and 1-octene, or a polypropylene resin composed of a random copolymer It is more preferable to use a block copolymer.

In the above-mentioned polypropylene resin comprising a block copolymer of propylene and ethylene or a copolymer of propylene and 1-octene, or a random copolymer, a resin having a density of about 0.9 g / cm ³ , a melt flow index (MFR) ) Can be used in a range of 4.0 g / 10 min or less, and a melt tension in a range of 10 cN or more can be used.
In the above, those having a melt flow index (MFR) of more than 4.0 g / 10 minutes are not preferable from the viewpoint of taking-up stability when performing top blown inflation film formation.
Further, in the above, when the melt tension is less than 10 cN, it is unfavorable on top blown inflation film formation and take-up stability (on film formation).

Next, in the present invention, a mixed resin layer of a polypropylene-based resin and a polyethylene-based resin constituting the co-extruded multilayer laminated resin film according to the present invention, or, as the polyethylene-based resin forming the polyethylene-based resin layer, for example, Ethylene and α-olefins such as propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, and others Polymers can be used.
Thus, in the present invention, as the polyethylene resin, from the viewpoint of compatibility and affinity with the polypropylene resin, and further from the viewpoint of the melt tension and the like of the polyethylene resin, Specifically, it is preferable to use a copolymer of ethylene and 1-octene.
The copolymer of ethylene and 1-octene has a melt flow rate (MFR) within a range of 0.1 to 6.0 g / 10 min, and a density of 0.900 to 0.930 g. / Cm ³ can be used.

In the above, if the melt flow rate (MFR) is less than 0.1 g / 10 min, the resin pressure of the extruder is increased, and there is a problem in productivity such as stopping of a machine (film forming machine). If the melt flow rate (MFR) exceeds 6.0 g / 10 min, it is difficult to form a top blown inflation film if the melt flow rate (MFR) exceeds 6.0 g / 10 min. This is undesirable because it makes it difficult to produce a stable film.
Further, in the above, when the density is less than 0.900 g / cm ³ , the reduction in the stiffness (rigidity) of the entire co-extruded multilayer laminated resin film is remarkable, which is not preferable because the physical properties of the film are also reduced. If the density exceeds 0.930 g / cm ³ , it is not preferable because it lacks the suitability as a heat seal layer (heat seal material). In the present invention, the melt flow rate (MFR) is a value measured at (ASTM) D1238 at 190 ° C. 2.16 kg, and the density is a value measured at (ASTM) D1505.

  Next, in the present invention, a method for forming a co-extruded multilayer laminated resin film according to the present invention as a heat-sealing resin layer using the above-mentioned polyethylene resin and polypropylene resin is described. To explain, first, in the present invention, the above-mentioned polypropylene-based resin is used, and this is used as a main component of the vehicle, and if necessary, for example, an antioxidant, an ultraviolet absorber, a light stabilizer, Additives such as antistatic agents, antiblocking agents, lubricants (fatty acid amides, etc.), flame retardants, inorganic or organic fillers, crosslinking agents, dyes, pigments and other colorants, as well as modifying resins and others Is added, and if necessary, a solvent, a diluent and the like are added, and the mixture is sufficiently kneaded to prepare a polypropylene resin composition.

  Next, in the present invention, similarly to the above, the above-mentioned polypropylene-based resin and polyethylene-based resin are used, and these are used as main components of the vehicle, and if necessary, for example, an antioxidant. , UV absorbers, light stabilizers, antistatic agents, anti-blocking agents, lubricants (fatty acid amides, etc.), flame retardants, inorganic or organic fillers, crosslinking agents, dyes, pigments and other coloring agents, and One or two or more additives such as a plastic resin and other additives, and further, if necessary, a solvent and a diluent are added, and the mixture is sufficiently kneaded to form a mixture of the polypropylene resin and the polyethylene resin. A mixed resin composition is prepared.

In the above, the mixing ratio of the polypropylene-based resin and the polyethylene-based resin is preferably 50 to 80% by weight, and the latter is preferably 20 to 80% by weight, more preferably 35 to 65% by weight. Things.
In the above description, when the polyethylene resin content is less than 20% by weight, and even less than 35% by weight, the co-extruded multilayer laminated resin film according to the present invention has a higher stiffness (rigidity), but has a higher stiffness at the interface of each layer of the film. It is not preferable because peeling occurs and seal strength and practicability are deteriorated. If it exceeds 80% by weight, furthermore, if it exceeds 65% by weight, the co-extruded multilayer laminated resin film according to the present invention will have a high sealing strength. Although the stickiness of the film is exhibited, it leads to a decrease in the physical properties of the film, a decrease in the stiffness (rigidity) and the like, and furthermore, it is not preferable because the interlayer adhesion of the film itself is reduced.

  Furthermore, in the present invention, in the same manner as described above, the polyethylene-based resin as described above is used, and these are used as main components of the vehicle, and if necessary, for example, an antioxidant, an ultraviolet absorber, Light stabilizers, antistatic agents, antiblocking agents, lubricants (fatty acid amides, etc.), flame retardants, inorganic or organic fillers, crosslinking agents, coloring agents such as dyes and pigments, furthermore, modifying resins, etc. One or more additives are added, and if necessary, a solvent, a diluent, and the like are added, and the mixture is sufficiently kneaded, and is laminated on one or both sides of the mixed resin layer. A resin composition is prepared.

  Next, in the present invention, a polypropylene-based resin composition of the above-prepared polypropylene-based resin, a mixed resin composition of a mixed resin of a polypropylene-based resin and a polyethylene-based resin, a polyethylene-based resin composition of a polyethylene-based resin, and the like. Is used, the polypropylene-based resin composition of the polypropylene-based resin forms a polypropylene-based resin layer that is at least one layer constituting the co-extruded multilayer laminated resin film of the present invention, and further, one side of the polypropylene-based resin layer Or, on both sides, a laminated resin composition of a mixed resin of a polypropylene-based resin and a polyethylene-based resin, and also a polyethylene-based resin composition of a polyethylene-based resin, the above-mentioned polypropylene-based resin and polyethylene-based resin Mixing with mixed resin composition To laminate on one or both sides of the resin layer, for example, using a plurality of extruders and a multilayer circular die, first extruding each resin layer from the circular die by a plurality of extruders, and then The extruded tube-like molten resin is expanded in a bubble shape and taken upward, and at this time, while preventing the bubble from swaying and stabilizing the bubble, the tube-like bubble immediately after extrusion is obtained. By blowing cold air onto the outer peripheral surface of the resin and cooling it to form a film, the co-extruded multilayer resin film of the present invention constituting the heat-sealing resin layer can be formed.

  Thus, in the present invention, as described above, the cylindrical co-extruded multilayer laminated resin film (molded film) is formed into a film by an upward inflation molding method using an air-cooling method. At least one layer constituting such a co-extruded multilayer laminated resin film is composed of a polypropylene resin layer, and further, on one or both surfaces of the polypropylene resin layer, a mixed resin of a mixed resin composition of a polypropylene resin and a polyethylene resin. Layers are laminated, and a cylindrical coextruded multilayer laminated resin in which a polyethylene resin layer of a polyethylene resin is laminated on one or both sides of a mixed resin layer of a mixed resin composition of a polypropylene resin and a polyethylene resin. Consisting of a film, further comprising the above-mentioned polypropylene-based resin layer, or a polypropylene constituting a mixed resin layer Resin, constituted by excellent polypropylene resin melt tension and stretchability, heat - tosyl - is capable of producing a coextruded multilayer laminated resin film of the present invention as Le resin layer.

Next, the thickness of each layer of the co-extruded multilayer laminated resin film according to the present invention produced above will be described. First, the thickness of the co-extruded multilayer laminated resin film according to the present invention is preferably about 20 to 200 μm, preferably Is preferably about 30 to 150 μm.
In the above, when the thickness of the co-extruded multilayer laminated resin film according to the present invention is about 30 μm, and more preferably less than 20 μm, it is preferable because it lacks basic physical properties such as basic strength and heat sealing properties. If the thickness exceeds 150 μm, and if it exceeds 200 μm, it is not environmentally friendly and costly.

Thus, in the present invention, a polypropylene resin layer constituting the co-extruded multilayer laminated resin film according to the present invention, a mixed resin layer of a polypropylene resin and a polyethylene resin laminated on one or both sides of the polypropylene resin layer And the thickness of the polyethylene-based resin layer laminated on one or both surfaces of the mixed resin layer, first, the thickness of the polypropylene-based resin layer is about 10 to 150 μm, preferably about 20 to 100 μm. The thickness of the mixed resin layer of the polypropylene-based resin and the polyethylene-based resin is about 5 to 100 μm, preferably about 10 to 70 μm, and the thickness of the polyethylene-based resin layer is preferably , About 5 to 100 μm, preferably about 10 to 70 μm.
In the above, when the thickness of the polypropylene resin layer is less than 20 μm, and further less than 10 μm, the strength of the whole film, the stiffness (rigidity) and the like are unfavorably reduced, and also 100 μm, If it exceeds 150 μm, it is not preferable because environmental problems and cost problems occur.
In the above, when the thickness of the mixed resin layer of the polypropylene-based resin and the polyethylene-based resin is less than 10 μm, and further less than 5 μm, the adhesion between the single polypropylene-based resin layer and the single polyethylene-based resin layer If the thickness exceeds 70 μm, and more than 100 μm, the strength and the stiffness (rigidity) of the film are liable to be reduced, and the suitability for heat sealing is also affected. This is undesirable for the reason.
Further, in the above, if the thickness of the polyethylene resin layer is less than 10 μm, and further less than 5 μm, it is not preferable because the heat seal (heat seal) suitability is lowered, and If it exceeds 70 μm, and further exceeds 100 μm, it is not preferable because basic physical properties such as strength and stiffness (rigidity) are reduced.

The co-extruded multilayer resin film according to the present invention produced as described above, polyethylene-based resin and polypropylene-based resin, each layer or in the layers constituting the co-extruded multilayer laminated resin film according to the present invention, mutually melted. Both exhibit compatibility, affinity, etc., and are firmly welded to each other. A resin layer is formed, and following it, a polypropylene-based resin layer constituting the core layer, and further, a mixed resin layer of a polypropylene-based resin and a polyethylene resin laminated on one side or both sides thereof, also used an air cooling method. The film can be formed by an inflation molding method in which the film is formed while the formed film is pulled upward.
Thus, the multilayer laminated heat-sealing resin layer according to the present invention comprises a polypropylene-based resin layer, a mixed resin layer of a polypropylene-based resin and a polyethylene resin, and a polyethylene-based resin layer between the layers or layers. It has extremely strong and tight adhesion inside and exhibits both properties, excellent transparency, and good openness, blocking resistance, slipperiness, stiffness / rigidity, impact resistance, etc. Furthermore, it is excellent in flexibility, heat seal property, laminate property, etc., has suitability for filling and packaging of contents, is capable of high-speed film formation, and has excellent film formation stability. It is possible to form a multi-layered heat-sealing resin layer as a heat-sealing resin layer having a low curling property.

  In particular, the co-extruded multilayer laminated resin film according to the present invention combines the properties such as the strength, rigidity, stiffness, and toughness of a polypropylene resin with the flexibility and heat seal properties of a polyethylene resin. In addition, it exhibits the synergistic effect, is excellent in transparency, and has good opening properties, blocking resistance, sliding properties, stiffness / rigidity, impact resistance, etc. It is excellent in sealing properties, laminating properties, etc., hardly shows phenomena such as delamination, and shows no leakage of filled contents, and has excellent storage and storage properties. It has the suitability for filling and packaging the contents and can produce a sufficiently satisfactory packaged product, and is extremely useful as a heat seal material.

Further, in the present invention, it is possible to form a film at a high speed, and when forming the film, it is excellent in film forming stability, and it is possible to remarkably reduce the production cost. A co-extruded multilayer laminated resin film according to the present invention as a metal material.
Thus, the above-described co-extruded multilayer laminated resin film according to the present invention is used as a heat-sealing material, and may be used in combination with other plastic base materials, paper base materials, metal base materials, cellophane, It can be laminated in any combination with various kinds of base films such as paper, etc. to produce a laminated material having various layer constitutions. In this manner, the gusset-type bag according to the present invention as a packaging container having various forms can be manufactured.

  Next, in the present invention, the laminated material according to the present invention as a packaging material using the co-extruded multilayer laminated resin film according to the present invention as a heat-sealing resin layer will be described in more detail. As a method for producing the above-mentioned laminate, for example, a dry laminate laminate method in which a desired base material such as a plastic film is arbitrarily laminated via a primer agent layer or an adhesive layer for laminate, or Through a laminating method such as an extrusion laminating method in which various resins and the like are melt-extruded through a primer agent layer or an anchor coating agent layer and a desired substrate is arbitrarily laminated, and the like. Thus, it is possible to manufacture the laminated material according to the present invention in various forms.

Thus, in the present invention, the base film forming the laminated material according to the present invention constituting the gusset-type bag according to the present invention will be described. As the base film, the gusset according to the present invention is used. Since it is a basic or auxiliary material that constitutes the mold bag, it has excellent properties in mechanical, physical, chemical, etc., excellent in strength, toughness, etc., furthermore, heat resistance, moisture resistance, A resin film or sheet excellent in pinhole resistance, piercing resistance, transparency, etc. can be used.
Specifically, for example, various types of polyester resin, polyamide resin, polyaramid resin, polyethylene resin, polypropylene resin, polycarbonate resin, polyacetal resin, fluorine resin, and others. A resin film or sheet can be used.
As the resin film or sheet, any of an unstretched film and a stretched film stretched in a uniaxial or biaxial direction can be used.
Further, in the present invention, the thickness of the resin film or sheet may be a thickness capable of holding strength, puncture resistance, rigidity, etc. to the minimum necessary. On the other hand, if it is too thin, the strength, piercing resistance, rigidity, etc. decrease, which is not preferable.
In the present invention, for the above reasons, about 10 μm to 100 μm, preferably about 12 μm to 50 μm is most desirable.
In the present invention, among the above resin films or sheets, particularly, a biaxially stretched polyester resin, a biaxially stretched polyamide resin or a biaxially stretched polyamide resin having a thickness of about 9 μm to 30 μm. It is preferable to use a stretched polypropylene resin film or sheet.

Furthermore, in the present invention, as the base film to be laminated with the co-extruded multilayer laminated resin film according to the present invention, in addition to the above-described base film, for example, having moldability, bending resistance, rigidity, etc. For example, a strong size bleached or unbleached paper base material, a paper base material such as pure white roll paper, kraft paper, paperboard, processed paper, or the like can be laminated.
In the above, it is desirable to use a paper base material having a basis weight of about 80 to 600 g / m ² , preferably a basis weight of about 100 to 450 g / m ² as the paper base material constituting the paper layer.
Of course, in the present invention, a paper substrate constituting the paper layer and various resin films or sheets as the above-mentioned substrate films can be used in combination.

Next, in the present invention, as the other base film laminated with the co-extruded multilayer laminated resin film according to the present invention, for example, a property of blocking light such as sunlight, or water vapor, water, oxygen It is possible to use a material having the property of not permeating gas or the like, or the like, and this may be a single base material or a composite base material obtained by combining two or more types of base materials. Good.
Specifically, for example, silicon oxide having a barrier property, a resin film having a deposited film of an inorganic oxide such as aluminum oxide, a low-density polyethylene having a barrier property such as water vapor and water, a medium-density polyethylene, and a high-density polyethylene having a high barrier property. Film or sheet of resin such as high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, polyvinyl alcohol having gas barrier properties, saponified ethylene-vinyl acetate copolymer, nylon MXD6 Films or sheets of various kinds of light-shielding colored resins obtained by adding a colorant such as a pigment to the resin and other desired additives and kneading to form a film. Can be used.
These materials can be used alone or in combination of two or more. The thickness of the above-mentioned film or sheet is arbitrary, but usually it is preferably about 5 μm to 300 μm, more preferably about 10 μm to 100 μm.

Further, in the above description, a deposited film of an inorganic oxide having a thickness of about 100 to 2000 mm can be used.
Examples of the resin film supporting the above-mentioned vapor-deposited film include a polyester film, a polyamide film, a polyolefin film, a polyvinyl chloride film, a polycarbonate film, a polyvinylidene chloride film, a polyvinyl alcohol film, and an ethylene-acetic acid film. A saponified vinyl copolymer film and others can be used.

In the above description, as the inorganic oxide constituting the above-described inorganic oxide vapor-deposited film layer, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide, tin oxide, zirconium oxide, or the like can be used. it can.
Furthermore, in the present invention, the inorganic oxide may be a mixture of silicon monoxide and silicon dioxide, or a mixture of silicon oxide and aluminum oxide.
In the present invention, the inorganic oxide thin film layer is formed by forming a vapor deposition film by a vacuum vapor deposition method such as an ion beam method or an electron beam method, or a sputtering method. be able to.
In the above, the thickness of the inorganic oxide thin film layer is usually preferably from about 100 ° to 2000 ° in order to obtain sufficient barrier properties, and particularly preferably from 200 ° to 1500 ° in the present invention. .
In the above description, when the thickness of the inorganic oxide thin film layer exceeds 1500 °, particularly when it exceeds 2000 °, cracks and the like are apt to be formed in the inorganic oxide thin film layer, and the risk of warpage deteriorating the barrier property. However, it is not preferable because of the problem that the material cost increases and the material cost is high. If the angle is less than 100 °, particularly less than 200 °, it is difficult to obtain the effect, which is not preferable.

Next, in the present invention, as another base film to be laminated on the co-extruded multilayer laminated resin film of the present invention, the adsorption of perfume components and the like contained in the contents to be filled and packaged is small and the fragrance is rich. Further, a resin film or sheet having a property of not causing a taste, an off-flavor or the like can be used.
Specifically, for example, polyacrylic resin, polymethacrylic resin, polyacrylonitrile resin, polymethacrylonitrile resin, polystyrene resin, polycarbonate resin, polyethylene terephthalate resin or the like Polyester resins such as a resin obtained by copolymerizing or modifying a part of an ethylene component and / or a terephthalate component with another di- or more polyhydric alcohol component or dicarboxylic acid component or a polyethylene naphthalate resin. Use a resin film or sheet of resin, polyamide resin, saponified ethylene-vinyl acetate copolymer, polyvinyl alcohol resin, polyvinyl chloride resin, polyvinylidene chloride resin, etc. Can be.
Thus, in the present invention, it is desirable to use a resin film or sheet having a scent-retaining property and a barrier property against oxygen gas or water vapor among the above-mentioned resin films or sheets. Specifically, for example, saponified ethylene-vinyl acetate copolymer, polyamide-based resin, polyacrylonitrile-based resin, or a resin-based resin film or sheet composed of polyester-based resin and the like, which is rich in fragrance retention and barrier properties. It is desirable to use

Furthermore, in the present invention, usually, packaging containers are physically and chemically subjected to severe conditions, so that the packaging material constituting the packaging container is required to have strict packaging suitability, Various conditions such as deformation prevention strength, drop impact strength, pinhole resistance, heat resistance, sealing property, quality maintenance, workability, hygiene, etc. are required. For this reason, in the present invention, Any material that satisfies the above conditions can be arbitrarily selected and used.
Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-acrylic acid Ethyl copolymer, ethylene-acrylic acid or methacrylic acid copolymer, methylpentene polymer, polybutene resin, polyvinyl chloride resin, polyvinyl acetate resin, polyvinylidene chloride resin, vinyl chloride-vinylidene chloride copolymer Coalescing, poly (meth) acrylic resin, polyacrylonitrile resin, polystyrene resin, acrylonitrile-styrene copolymer (AS resin), acrylonitrile-butadiene-styrene copolymer (ABS resin), polyester resin, Polyamide resin, polycarbonate Known resins such as a neat resin, a polyvinyl alcohol resin, a saponified ethylene-vinyl acetate copolymer, a fluorine resin, a diene resin, a polyacetal resin, a polyurethane resin, nitrocellulose, etc. Arbitrarily selected from the above resin films or sheets.
In addition, for example, a film such as cellophane, synthetic paper, or the like can be used. In the present invention, the above-mentioned film or sheet may be any one of unstretched and uniaxially or biaxially stretched.
The thickness is arbitrary, but can be selected from a range of several μm to 300 μm.
Further, in the present invention, the film or sheet may be any film such as an extruded film, an inflation film, or a coating film.

In the present invention, in the laminated material according to the present invention that constitutes the gusset-type bag according to the present invention, an arbitrary printed pattern is formed on the front surface, the back surface, or both surfaces of any material constituting the laminated material. A layer can be provided.
Thus, in the present invention, as the above-mentioned printing pattern layer, for example, on the above-mentioned base film, for example, printing a desired printing pattern consisting of characters, figures, symbols, patterns, etc., It can form a printed pattern layer.
Thus, the above-mentioned printed pattern layer is, specifically, firstly composed mainly of one or more kinds of ink vehicles such as resins, and, if necessary, a plasticizer and a stabilizer. , One or two or more additives such as antioxidants, light stabilizers, ultraviolet absorbers, curing agents, crosslinking agents, lubricants, antistatic agents, fillers, etc. A colorant such as a pigment is added, and the mixture is sufficiently kneaded with a solvent, a diluent, or the like to prepare an ink composition. Then, the ink composition is used, for example, gravure printing, offset printing, letterpress printing, screen printing. The present invention uses a printing method such as printing, transfer printing, flexographic printing, etc., and prints a desired printing pattern consisting of characters, figures, symbols, pictures, etc. Can form a printed pattern layer according to

  In the above, known vehicles for the ink include, for example, linseed oil, cutting oil, soybean oil, hydrocarbon oil, rosin, rosin ester, rosin modified resin, shellac, alkyd resin, phenolic resin, and maleic resin. Acid resin, natural resin, hydrocarbon resin, polyvinyl chloride resin, polyvinyl acetate resin, polystyrene resin, polyvinyl butyral resin, acrylic or methacrylic resin, polyamide resin, polyester resin, polyurethane resin Use one or more of epoxy resin, urea resin, melamine resin, aminoalkyd resin, phenol resin, nitrocellulose, ethylcellulose, chlorinated rubber, cyclized rubber, etc. Can be.

Next, in the present invention, the laminating adhesive layer constituting the laminate according to the present invention will be described. As the laminating adhesive constituting the laminating adhesive layer, for example, polyamine is used. A vinyl acetate adhesive, a homopolymer such as ethyl acrylate, butyl or 2-ethylhexyl acrylate, or a polyacrylate adhesive comprising a copolymer of these with methyl methacrylate, acrylonitrile, styrene, or the like; Cyanoacrylate adhesives, ethylene copolymer adhesives composed of copolymers of ethylene with monomers such as vinyl acetate, ethyl acrylate, acrylic acid, methacrylic acid, etc., cellulose adhesives, polyester adhesives Resin, polyamide-based adhesive, polyimide-based adhesive, urea resin or melamine resin Phenolic resin adhesive, epoxy adhesive, polyurethane adhesive, reactive (meth) acrylic adhesive, rubber adhesive composed of chloroprene rubber, nitrile rubber, styrene-butadiene rubber, etc., silicone Adhesives such as inorganic adhesives made of alkali adhesives, alkali metal silicates, low-melting glass and the like, and others can be used.
The composition system of the above-mentioned adhesive may be any composition form such as aqueous type, solution type, emulsion type, dispersion type, etc., and its properties include film sheet, powder, and solid. Any form may be used, and the bonding mechanism may be any form such as a chemical reaction type, a solvent volatilization type, a heat melting type, and a heat pressure type.
The above adhesive can be applied by, for example, a roll coating method, a gravure roll coating method, a kiss coating method, or another coating method, or a printing method. The coating amount is preferably about 0.1 to 10 g / m ² (dry state).

Next, in the present invention, the anchor coating agent layer constituting the laminated material according to the present invention will be described. As the anchor coating agent constituting the anchor coating agent layer, for example, alkyl titanate is used. And various aqueous or oily anchor coating agents such as organic titanium-based, isocyanate-based, polyethyleneimine-based, polybutadiene-based, and the like.
The above-mentioned anchor coating agent can be coated by using a coating method such as roll coating, gravure roll coating, kiss coating and others. The amount is desirably about 0.1 to 5 g / m ² (dry state).

Examples of the melt-extruded resin layer in the above-described extrusion laminate method include polyethylene resin, polypropylene resin, acid-modified polyethylene resin, acid-modified polypropylene resin, ethylene-acrylic acid or methacrylic acid copolymer. Thermoplastic resins such as, a phosphorus resin, an ethylene-vinyl acetate copolymer, a polyvinyl acetate resin, an ethylene-acrylate or methacrylate copolymer, a polystyrene resin, a polyvinyl chloride resin, and others. One or more of these can be used.
In the above-described extrusion-lamination lamination method, in order to obtain a stronger adhesive strength, for example, lamination can be performed via an anchor-coat agent layer such as the above-described anchor-coat agent. .

In the present invention, examples of the primer agent layer include polyurethane resin, polyester resin, polyamide resin, epoxy resin, phenol resin, (meth) acrylic resin, and polyvinyl acetate resin. The primer agent layer can be formed using a resin composition containing a polyolefin resin such as polyethylene or polypropylene or a copolymer or modified resin thereof, a cellulose resin, or the like as a main component of the vehicle. .
In the present invention, for example, a primer coating agent layer is formed by coating using a coating method such as roll coating, gravure coating, kiss coating, or the like. Thus, the coating amount is desirably about 0.1 to 10 g / m ² (dry state).
In the present invention, when performing the above-mentioned lamination, if necessary, a pretreatment such as a corona treatment or an ozone treatment can be performed on the film.

Thus, in the present invention, as described above, in the method for producing the gusset-type bag according to the present invention using the laminated material according to the present invention, the heat sealing method includes, for example, a bag. A known method such as a seal, a rotary roll seal, a belt seal, an impulse seal, a high-frequency seal, an ultrasonic seal, or the like can be used.
Note that, in the present invention, the gusset-type bag according to the present invention can be arbitrarily attached with, for example, a one-piece type, a two-piece type, or the like, a spout, or a zipper for opening and closing. It is as follows.

In the present invention, the gusset-type bag according to the present invention produced as described above includes, for example, foods and drinks, fruit juice, juice, drinking water, sake, cooked foods, fishery products, frozen foods, meat products, boiled foods, Various foods and beverages such as mochi, liquid soups, seasonings, etc., chemicals and cosmetics such as adhesives, adhesives, liquid detergents, pharmaceuticals, miscellaneous goods such as chemical warmers, photosensitive materials, and other articles Can be filled and packaged.
Thus, in the present invention, in particular, for example, a gusset-type bag for filling and packaging soy sauce, sauce, soup, etc., a gusset-type bag for filling and packaging juice, fruit juice, etc., or a boiler Alternatively, it is useful as a gusset-type bag for filling and packaging liquid foods and drinks such as gusset-type bags for filling and packaging retort foods and the like, and foods and drinks containing water and the like.
In the present invention, for example, the contents are filled from the opening of the gusset manufactured as described above, and then the upper opening is heat-sealed to form an upper seal or the like. As required, for example, boil processing, retort processing, and the like are performed, so that packaged products having various forms can be manufactured.
Next, the present invention will be described more specifically with reference to examples.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene comprising propylene-1 · octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min ) 50 parts by weight of an ethylene-1 octene copolymer copolymerized using a single site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / cm ³ , Melt flow rate, MFR = 0.85 g / 10 min).
(C). Resin composition constituting third layer (core layer) Functional polypropylene composed of propylene-1-octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = A resin composition consisting of 100 parts by weight (0.5 g / 10 min) was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of the resin composition of (a) with a thickness of 20 μm by using three types and five layers of a top-blowing air-cooled inflation coextrusion film forming machine. (B) the layer of the resin composition of 20 μm, (c) the layer of the resin composition of 20 μm, (d) the layer of the resin composition of 20 μm, and (e) the layer of the resin composition of 20 μm. Then, a multilayer laminated resin film according to the present invention comprising a co-extruded inflation film having a total thickness of 100 μm and three types and five layers was produced.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was found to be extremely excellent in stiffness and rigidity, the interlaminar strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, the surface of the fifth layer of the co-extruded multilayer laminated resin film produced above is subjected to corona treatment, and then the two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 15 μm-thick biaxially stretched nylon 6 film (manufactured by Toyobo Co., Ltd., trade name: Harden N), which is white printed on the entire surface of the laminating adhesive layer by a gravure printing method. -1022] to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene comprising propylene-1 · octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min ) 50 parts by weight of an ethylene-1 octene copolymer copolymerized using a single site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / cm ³ , Melt flow rate, MFR = 0.85 g / 10 min).
(C). Resin composition constituting third layer (core layer) Functional polypropylene composed of propylene-1-octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = A resin composition consisting of 100 parts by weight (0.5 g / 10 min) was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of 12.5 μm by using a resin composition of (a) with an upper blow air-cooled inflation co-extrusion film forming machine. , The layer of the resin composition of (b) is 12.5 μm, the layer of the resin composition of (c) is 50 μm, the layer of the resin composition of (d) is 12.5 μm, and the layer of the resin composition of (e). Was co-extruded to 12.5 μm to form a film, thereby producing a multilayer laminated resin film according to the present invention comprising five types of five co-extruded inflation films having a total thickness of 100 μm.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, a corona treatment is applied to the surface of the fifth layer of the co-extruded multilayer laminated resin film produced above, and then a two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 12 μm-thick biaxially stretched polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., trade name, Toyobo ester E5100] to obtain a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene comprising propylene-1 · octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min ) 65 parts by weight of an ethylene-1 octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / cm ³ , Melt flow rate, MFR = 0.85 g / 10 min) in 35 parts by weight.
(C). Resin composition constituting third layer (core layer) Functional polypropylene composed of propylene-1-octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = A resin composition consisting of 100 parts by weight (0.5 g / 10 min) was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of 12.5 μm by using a resin composition of (a) with an upper blow air-cooled inflation co-extrusion film forming machine. , The layer of the resin composition of (b) is 12.5 μm, the layer of the resin composition of (c) is 50 μm, the layer of the resin composition of (d) is 12.5 μm, and the layer of the resin composition of (e). Was co-extruded to 12.5 μm to form a film, thereby producing a multilayer laminated resin film according to the present invention comprising five types of five co-extruded inflation films having a total thickness of 100 μm.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, a corona treatment is applied to the surface of the fifth layer of the co-extruded multilayer laminated resin film produced above, and then a two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 15-μm-thick biaxially stretched nylon 6 film (manufactured by Toyobo Co., Ltd., trade name: Harden N), which is white printed on the entire surface of the laminating adhesive layer by a gravure printing method, is used. -1102) was laminated to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene comprising propylene-1 · octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min ) 35 parts by weight and an ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / cm ³ , (Melt flow rate, MFR = 0.85 g / 10 min) to obtain a resin composition comprising 65 parts by weight.
(C). Resin composition constituting third layer (core layer) Functional polypropylene composed of propylene-1-octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = A resin composition consisting of 100 parts by weight (0.5 g / 10 min) was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of 12.5 μm by using a resin composition of (a) with an upper blow air-cooled inflation co-extrusion film forming machine. , The layer of the resin composition of (b) is 12.5 μm, the layer of the resin composition of (c) is 50 μm, the layer of the resin composition of (d) is 12.5 μm, and the layer of the resin composition of (e). Was co-extruded to 12.5 μm to form a film, thereby producing a multilayer laminated resin film according to the present invention comprising five types of five co-extruded inflation films having a total thickness of 100 μm.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, a desired printing pattern is formed on the surface of the corona-treated surface of the biaxially stretched polyethylene terephthalate film having a thickness of 12 μm using a normal gravure ink composition by a gravure printing method. A two-part curable urethane adhesive (main component: polyester polyol, curing agent: aliphatic sissocyanate) was used on the entire surface, and the thickness was 4.0 g / m by a gravure roll coating method. ² (dry state) to form an adhesive layer for laminating, and then apply the co-extruded multilayer laminated resin film produced in Example 4 on the surface of the adhesive layer for laminating. The fourth resin layer was overlaid with the corona-treated surfaces facing each other, and then both were dry-laminated and laminated to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
On the other hand, using a polypropylene resin, the polypropylene resin is melted at about 200 ° C., and injection-molded using an injection molding method, and the cylindrical mouth has an inner diameter of 8.5 mm, an outer diameter of 11 mm, and a height of 11 mm. , 20 mm and a boat-shaped adhesive base having a width of 20 mm, a height of 10 mm.
In the same manner as described above, a cap was formed by injection molding using a polypropylene resin and capable of being screwed onto the cylindrical mouth of the spout body.
A 1 mm thick packing material made of polyethylene sheet was fitted and locked on the inner top surface of the cap.
Next, the boat-shaped adhesive base of the spout body manufactured as described above is brought into contact with the opening of the gusset-type bag manufactured as described above, and the abutted portion is heat-sealed and closely adhered to the gusset. A packaging container with a spout comprising a mold bag and a spout body was manufactured.
Then, from the opening of the outlet of the packaging container with the above-mentioned outlet, filling and packaging powdered cocoa, and further, at the opening, the cap produced above was screwed into the cylindrical mouth, A packaged product according to the present invention was manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting first layer Functional polypropylene made of propylene-1 · octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min) ) A resin composition consisting of 100 parts by weight was prepared.
(B). Resin composition constituting second layer Functional polypropylene comprising propylene-1 · octene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min ) 65 parts by weight of an ethylene-1 octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / cm ³ , Melt flow rate, MFR = 0.85 g / 10 min) in 35 parts by weight.
(C). Resin composition constituting third layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of the resin composition of (a) at 34 μm using a three-type, three-layer, top-blowing air-cooled inflation coextrusion film-forming machine. A layer composed of a coextruded inflation film having a total thickness of 100 μm of three types and three layers is formed by coextruding the layer of the resin composition of (b) to 33 μm and the layer of the resin composition of (c) to 33 μm. A multilayer laminated resin film according to the invention was manufactured.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, the surface of the first layer of the co-extruded multilayer laminated resin film produced above is subjected to a corona treatment, and then the two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 15-μm-thick biaxially stretched nylon 6 film (manufactured by Toyobo Co., Ltd., trade name: Harden N), which is white printed on the entire surface of the laminating adhesive layer by a gravure printing method, is used. -1102) was laminated to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene composed of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min) 50 Parts by weight and an ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan Co., Ltd., density = 0.920 g / cm ³ , melt flow (MFR = 0.85 g / 10 min) 50 parts by weight.
(C). Resin composition constituting third layer (core layer) Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0. (5 g / 10 min) A resin composition consisting of 100 parts by weight was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of the resin composition of (a) with a thickness of 20 μm by using three types and five layers of a top-blowing air-cooled inflation coextrusion film forming machine. (B) the layer of the resin composition of 20 μm, (c) the layer of the resin composition of 20 μm, (d) the layer of the resin composition of 20 μm, and (e) the layer of the resin composition of 20 μm. Then, a multilayer laminated resin film according to the present invention comprising a co-extruded inflation film having a total thickness of 100 μm and three types and five layers was produced.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was found to be extremely excellent in stiffness and rigidity, the interlaminar strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, the surface of the fifth layer of the co-extruded multilayer laminated resin film produced above is subjected to corona treatment, and then the two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 15 μm-thick biaxially stretched nylon 6 film (manufactured by Toyobo Co., Ltd., trade name: Harden N), which is white printed on the entire surface of the laminating adhesive layer by a gravure printing method. -1022] to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene composed of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min) 50 Parts by weight and an ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan Co., Ltd., density = 0.920 g / cm ³ , melt flow (MFR = 0.85 g / 10 min) 50 parts by weight.
(C). Resin composition constituting third layer (core layer) Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0. (5 g / 10 min) A resin composition consisting of 100 parts by weight was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of 12.5 μm by using a resin composition of (a) with an upper blow air-cooled inflation co-extrusion film forming machine. , The layer of the resin composition of (b) is 12.5 μm, the layer of the resin composition of (c) is 50 μm, the layer of the resin composition of (d) is 12.5 μm, and the layer of the resin composition of (e). Was co-extruded to 12.5 μm to form a film, thereby producing a multilayer laminated resin film according to the present invention comprising five types of five co-extruded inflation films having a total thickness of 100 μm.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, a corona treatment is applied to the surface of the fifth layer of the co-extruded multilayer laminated resin film produced above, and then a two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 12 μm-thick biaxially stretched polyethylene terephthalate film (manufactured by Toyobo Co., Ltd., trade name, Toyobo ester E5100] to obtain a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min) 65 Parts by weight and an ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan Co., Ltd., density = 0.920 g / cm ³ , melt flow Latet, MFR = 0.85 g / 10 min) in 35 parts by weight.
(C). Resin composition constituting third layer (core layer) Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0. (5 g / 10 min) A resin composition consisting of 100 parts by weight was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of 12.5 μm by using a resin composition of (a) with an upper blow air-cooled inflation co-extrusion film forming machine. , The layer of the resin composition of (b) is 12.5 μm, the layer of the resin composition of (c) is 50 μm, the layer of the resin composition of (d) is 12.5 μm, and the layer of the resin composition of (e). Was co-extruded to 12.5 μm to form a film, thereby producing a multilayer laminated resin film according to the present invention comprising five types of five co-extruded inflation films having a total thickness of 100 μm.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, a corona treatment is applied to the surface of the fifth layer of the co-extruded multilayer laminated resin film produced above, and then a two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 15-μm-thick biaxially stretched nylon 6 film (manufactured by Toyobo Co., Ltd., trade name: Harden N), which is white printed on the entire surface of the laminating adhesive layer by a gravure printing method, is used. -1102) was laminated to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), (c), (d), and (e) were prepared.
(I). Resin composition constituting first layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(B). Resin composition constituting second layer Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min) 35 Parts by weight and an ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan Co., Ltd., density = 0.920 g / cm ³ , melt flow Latet, MFR = 0.85 g / 10 min) 65 parts by weight.
(C). Resin composition constituting third layer (core layer) Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0. (5 g / 10 min) A resin composition consisting of 100 parts by weight was prepared.
(D). Resin Composition Constituting Fourth Layer The resin composition prepared in (b) above was used in the same manner.
(E). Resin Composition Constituting Fifth Layer The resin composition prepared in (A) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of 12.5 μm by using a resin composition of (a) with an upper blow air-cooled inflation co-extrusion film forming machine. , The layer of the resin composition of (b) is 12.5 μm, the layer of the resin composition of (c) is 50 μm, the layer of the resin composition of (d) is 12.5 μm, and the layer of the resin composition of (e). Was co-extruded to 12.5 μm to form a film, thereby producing a multilayer laminated resin film according to the present invention comprising five types of five co-extruded inflation films having a total thickness of 100 μm.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, a desired printing pattern is formed on the surface of the corona-treated surface of the biaxially stretched polyethylene terephthalate film having a thickness of 12 μm using a normal gravure ink composition by a gravure printing method. A two-part curable urethane adhesive (main component: polyester polyol, curing agent: aliphatic sissocyanate) was used on the entire surface, and the thickness was 4.0 g / m by a gravure roll coating method. ² (dry state) to form an adhesive layer for laminating, and then apply the co-extruded multilayer laminated resin film produced in Example 4 on the surface of the adhesive layer for laminating. The fourth resin layer was overlaid with the corona-treated surfaces facing each other, and then both were dry-laminated and laminated to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
On the other hand, using a polypropylene resin, the polypropylene resin is melted at about 200 ° C., and injection-molded using an injection molding method, and the cylindrical mouth has an inner diameter of 8.5 mm, an outer diameter of 11 mm, and a height of 11 mm. , 20 mm and a boat-shaped adhesive base having a width of 20 mm, a height of 10 mm.
In the same manner as described above, a cap was formed by injection molding using a polypropylene resin and capable of being screwed onto the cylindrical mouth of the spout body.
A 1 mm thick packing material made of polyethylene sheet was fitted and locked on the inner top surface of the cap.
Next, the boat-shaped adhesive base of the spout body manufactured as described above is brought into contact with the opening of the gusset-type bag manufactured as described above, and the abutted portion is heat-sealed and closely adhered to the gusset. A packaging container with a spout comprising a mold bag and a spout body was manufactured.
Then, from the opening of the outlet of the packaging container with the above-mentioned outlet, filling and packaging powdered cocoa, and further, at the opening, the cap produced above was screwed into the cylindrical mouth, A packaged product according to the present invention was manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting first layer Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min) 100 A resin composition consisting of parts by weight was prepared.
(B). Resin composition constituting second layer Functional polypropylene made of propylene-ethylene copolymer (polypropylene block copolymer, density = 0.900 g / cm ³ , melt flow rate, MFR = 0.5 g / 10 min) 65 Parts by weight and an ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (ELITE 5100, manufactured by Dow Chemical Japan Co., Ltd., density = 0.920 g / cm ³ , melt flow Latet, MFR = 0.85 g / 10 min) in 35 parts by weight.
(C). Resin composition constituting third layer Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / A resin composition consisting of 100 parts by weight (cm ³ , melt flow rate, MFR = 0.85 g / 10 min) was prepared.
(2). Next, using the resin compositions prepared as described above, these were formed into a layer of the resin composition of (a) at 34 μm using a three-type, three-layer, top-blowing air-cooled inflation coextrusion film-forming machine. A layer composed of a coextruded inflation film having a total thickness of 100 μm of three types and three layers is formed by coextruding the layer of the resin composition of (b) to 33 μm and the layer of the resin composition of (c) to 33 μm. A multilayer laminated resin film according to the invention was manufactured.
When the physical properties of the above-mentioned multilayer laminated resin film were measured, it was extremely excellent in stiffness and rigidity, and the interlayer strength at each laminated interface was sufficient, and no delamination was observed.
Further, it was possible to form a film at a high speed with respect to the above-mentioned multilayer laminated resin film, and when forming the film into a film, was excellent in film forming stability, and was able to significantly reduce the production cost. .
(3). Next, the surface of the first layer of the co-extruded multilayer laminated resin film produced above is subjected to a corona treatment, and then the two-component curable urethane adhesive (main component: polyester polyol, Curing agent: aliphatic schisocyanate), which is coated to a thickness of 4.0 g / m ² (dry state) by a gravure roll coating method, and an adhesive layer for laminating is applied. Then, a 15-μm-thick biaxially stretched nylon 6 film (manufactured by Toyobo Co., Ltd., trade name: Harden N), which is white printed on the entire surface of the laminating adhesive layer by a gravure printing method, is used. -1102) was laminated to produce a laminated material according to the present invention.
(4). Next, using the laminated material produced above, a front plate and a rear plate each having a size of 100 mm x 150 mm, and an inverted V-shaped left and right plates each having a size of 100 mm x 50 mm were cut out. Board, and the coextruded multilayer laminated resin film is disposed with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right side plate are disposed with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A gusset-type bag according to the present invention, wherein a left and right upper end portion is sealed from an impulse sealer to form a left and right upper end seal portion and an opening is formed. Was prepared.
The gusset-type bag manufactured as described above is filled and packaged with powdered cocoa from the opening, and then the opening is heat-sealed to form an upper seal portion, according to the present invention. Packaging products using gusset-type bags were manufactured.
In the packaged product produced above, the multilayer laminated resin film as a heat seal material has excellent properties such as strength and waist, and also has excellent transparency, slipperiness, impact resistance, tearability, and the like. Furthermore, since it is excellent in heat seal properties, laminate properties, and the like, phenomena such as delamination are hardly observed, and leakage of the filled contents is not observed. To manufacture packaging products that have excellent filling properties and packaging suitability with excellent storability, preservability, etc., and that do not fall over, buckle, or bend from the trunk (bowing), and are fully satisfactory. Was completed.
Further, when a drop test from 1.2 m was performed five times, no bag breakage or leakage was observed at all.

[Comparative Example 1]
(1). Ethylene-1-octene copolymer copolymerized using a single-site catalyst (metallocene catalyst) (manufactured by Dow Chemical Japan, ELITE 5100, density = 0.920 g / cm ³ , melt flow rate, MFR = (0.85 g / 10 min) 100 parts by weight of a resin composition was prepared.
(2). Next, an extruded inflation film having a total thickness of 100 μm was produced from the resin compositions prepared above using a single-layer top-blowing air-cooled inflation extruder.
(3). Next, using the extruded inflation film produced above, one surface of the extruded inflation film is subjected to a corona discharge treatment, and then a two-part curable polyurethane-based laminating adhesive is applied to the corona treated surface. Then, an adhesive layer was formed by applying 3.0 g / m ² (dry), and then a 12 μm-thick biaxially stretched polyethylene terephthalate film was dry-laminated on the surface of the adhesive layer to form a laminated material. Manufactured.
(4). Next, using the laminated material manufactured above, a front plate, a rear plate, and a 100 mm × 50 mm inverted V-shaped left side plate and a right side plate of 100 mm × 50 mm were cut out therefrom. Plate and the coextruded multilayer laminated resin film are arranged with the surfaces thereof facing each other, and further, on the right and left ends thereof, the left side plate and the right plate are arranged with the surfaces of the coextruded multilayer laminated resin film facing each other. Then, four sides of the 150 mm side are sealed from the impulse sealer to form a sand seal on both sides, and then the lower end is sealed from the impulse sealer to a bottom seal. A left and right upper end portion was sealed with an impulse sealer to form a left and right upper end seal portion, and an opening was formed, thereby producing a gusset-type bag.
In the gusset-type bag manufactured as described above, powdered cocoa is filled and packaged from the opening, and then the opening is heat-sealed to form an upper seal portion, thereby forming the gusset-type bag. The used packaging products were manufactured.

[Experimental example]
About the co-extruded multilayer laminated resin film, laminated material, and gusset-type bag according to the present invention produced in Examples 1 to 10 above, and the inflation film, laminated material, and gusset-type bag produced in Comparative Example 1 above The following physical properties were measured.
(1). Measurement of Film Thickness This was carried out on a co-extruded multilayer laminated resin film according to the present invention manufactured in Examples 1 to 10 and an inflation film manufactured in Comparative Example 1 by a μ-meter manufactured by Sony Corporation. It was measured.
(2). Measurement of stiffness / rigidity This is a pure bending tester manufactured by SMT Co., Ltd. for the coextruded multilayer laminated resin film according to the present invention manufactured in Examples 1 to 10 and the inflation film manufactured in Comparative Example 1. Using a JTC-911BT pure bending tester, the stiffness (bending torque) was measured.
In addition, the average bending strength was used for the measured value of stiffness and rigidity.
(3). Measurement of Seal Strength This is the surface of the polyethylene resin layers constituting the outer layer from the impulse sealer for the laminated materials according to the present invention manufactured in Examples 1 to 10 and the laminated material manufactured in Comparative Example 1. Were superposed and sealed, and the T-shaped peel strength was measured under the conditions of 15 mm width and 300 mm / min.
(4). The measurement of the drop test of the gusset type bag This uses the laminated material according to the present invention manufactured in Examples 1 to 10 and the laminated material manufactured in Comparative Example 1, and then a front plate, a rear plate composed of 100 mm × 150 mm, And, a 100 mm × 50 mm inverted V-shaped left side plate and right side plate are cut out, and first, a front plate and a rear plate are arranged with their heat-sealing resin layers facing each other. The left side plate and the right side plate are arranged at the ends of the right and left materials with the surface of the heat-sealing resin layer facing each other, and then the four sides of the 150 mm side are sealed from the impulse sealer. To form a sand seal on both sides, and then seal the lower end from the impulse seal to form a bottom seal, and furthermore, impulse seal both the left and right ends of the upper end. To form upper and lower seals and an opening, The Gazette-type bag was produced.
Thereafter, water was put into the gusset-type bag manufactured as described above, and then the upper opening was sealed to prepare a gusset-type bag containing water.
The water-containing gusset-type bag prepared above was dropped five times from a height of 1.2 m to perform a drop impact test, and the seal strength and practicality were confirmed and measured.
The above measurement results are shown in Table 1 below.

(Table 1)
膜厚 │ │ film thickness [μm] │ rigidity [N / m ││Seal strength [N] │ ├─────┼──────┼───────────┼────────┤ │Example 1│ 100 │ 3.3 × 10 ^-5 │ 28.5 │ ├─────┼──────┼───────────┼────────┤ │ Example 2 │100│4.5 × 10 ^-5 │33.5│├─────┼──────┼───────────┼────── ││Example 3││100│4.9 × 10 ^-5 │36.8│ ├─────┼──────┼───────────┼── │ │Example 4 │ 100 │ 4.1 × 10 ^-5 │ 33.3 │ ─ ────────┤ │ Example ^{5 │ 100 │ 4.0 × 10 -5} │ 34.0 │ ├─────┼──────┼──────── │ │Example 6 │ 100 │ 3.3 × 10 ^-5 │ 28.5 │ ├─────┼──────┼──── │ │Example 7 │ 100 │ 4.5 × 10 ^-5 │ 33.5 │ ├─────┼──────┼ │ │Example 8 │ 100 │ 4.9 × 10 ^-5 │ 36.8 │ ├─────┼─── │ Example 9 │ 100 │ 4.1 × 10 ^-5 │ 33.3 │ ├───── ││Example 10│ 100│4.0 × 10 ^-5 │ 34.0 │ ├─────┼──────┼───────────┼────────┤ │ Comparative Example 1 │ 100 │ 1.7 × 10 ^-5 │ 20.8 │ └─────┴──────┴───────────┴────────┘
ウ │ │ Pouch drop test │ │ ├──────┬───────┤ │ │ Seal Strength │ Practicality │ ├─────┼──────┼───────┤ │ Example 1 │ 28.5 │ ○ 〜 ◎ │ ├─────┼─── │ │ Example 2 │ 33.5 │ ◎ │ │ │ Example 3 │ 36.8 │ ◎ │ ├─────┼──────┼───────┤ │ Example 4 │ 33.3 │ ◎ │ ├─────┼──── │ │Example 5 │ 34.0 │ ◎ │ ├─────┼──────┼───────┤ │Example 6 │ 28 │ ○ ~ ◎ │ ├─────┼──────┼───────┤ │ Example 7 │ 33.5 │ ◎ │ ├── │ │Example 8│ │36.8 │ ◎ │ ├─────┼──────┼────── │ │Example 9│ 33.3 │ ◎ │ ├─────┼──────┼───────┤ │Example 10│ 34.0 │ ◎ │ ├─── │ │ Comparative Example 1 │ 20.8 │ △ │ └─────┴──────┴─────── ┘

  As is clear from the results shown in Table 1 above, the co-extruded multilayer laminated resin film, laminated material, gusset-type bag and the like according to the present invention have high stiffness and rigidity, and are used for packaging materials, industrial materials and the like. It turned out that it can be used practically as a product member, a packaging bag, and the like.

The gusset-type bag according to the present invention includes, for example, foods and drinks, fruit juices, juices, drinking water, alcohol, cooked foods, seafood kneaded products, frozen foods, meat products, boiled foods, rice cakes, liquid soups, seasonings, etc. Can be filled and packed with various foods and beverages such as adhesives, adhesives, chemicals such as liquid detergents, cosmetics, pharmaceuticals, miscellaneous goods such as chemical warmers, photosensitive materials, and other articles. Things.
Thus, in the present invention, in particular, for example, a gusset-type bag for filling and packaging soy sauce, sauce, soup, etc., a gusset-type bag for filling and packaging juice, fruit juice, etc., or a boiler Alternatively, it is useful as a gusset-type bag for filling and packaging liquid foods and drinks such as gusset-type bags for filling and packaging retort foods and the like, and foods and drinks containing water and the like.

It is a schematic sectional drawing which shows the layer structure of an example about the co-extruded multilayer laminated resin film which concerns on this invention which comprises the gusset type bag which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of an example about the co-extruded multilayer laminated resin film which concerns on this invention which comprises the gusset type bag which concerns on this invention. It is a schematic sectional drawing which shows the layer structure of an example about the laminated material concerning this invention as a packaging material manufactured using the co-extruded multilayer laminated resin film concerning this invention shown in said FIG. It is a schematic sectional drawing which shows the layer structure of an example about the laminated material concerning this invention as a packaging material manufactured using the co-extruded multilayer laminated resin film concerning this invention shown in said FIG. FIG. 3 is a schematic diagram showing an example of the configuration of the gusset-type bag according to the present invention manufactured by forming the laminated material according to the present invention manufactured using the co-extruded multilayer laminated resin film according to the present invention shown in FIG. FIG. FIG. 3 is a schematic diagram showing an example of the configuration of the gusset-type bag according to the present invention manufactured by forming the laminated material according to the present invention manufactured using the co-extruded multilayer laminated resin film according to the present invention shown in FIG. FIG. FIG. 7 is a schematic perspective view showing an example of the configuration of a packaged product manufactured using the gusset-type bag according to the present invention manufactured using the laminated material according to the present invention shown in FIG. 6.

Explanation of reference numerals

A Co-extruded multilayer laminated resin film A ₁ Co-extruded multilayer laminated resin film B Laminated material B ₁ Laminated material C gusset type bag D Packaging product 1 Co-extruded multilayer laminated resin film 1a Co-extruded multilayer laminated resin film 2 Polypropylene resin layer 3 Mixed Resin layer 4 Polyethylene resin layer 5 Co-extruded multilayer laminate 5a Co-extruded multilayer laminate 11 Base film 12 Printed pattern layer 21 Front plate 22 Rear plate 23 Left plate 24 Right plate 25 Left and right side edges 26 Lower edge 27 Upper edge Left end 28 right end of upper end 29 right and left side seals 30 bottom seal 31 left upper seal 32 right upper seal 33 opening 34 contents 35 upper seal

Claims (9)

The front plate having a heat-sealing resin layer on the inner surface side and the rear plate also having a heat-sealing resin layer on the inner surface side are separated by a heat-sealing resin layer. A left side plate which is disposed so as to face each other, further provided with a heat sealable resin layer on the inner surface between the left and right ends of the front plate and the rear plate, and which is bent inward to form a V-shaped cross section. And the right side plate are arranged such that the surface of the heat-sealing resin layer faces the surface of the heat-sealing resin layer provided on the inner surfaces of the front plate and the rear plate. The left and right side edges, the lower end, and the left and right edges of the front plate, the rear plate, the left side plate, and the right side plate which are overlapped with each other are connected to each other by opposing surfaces of the heat-sealing resin layer. -Sealing, the left and right side seals, the bottom seal, and the left and right tops at the left and right ends, the lower end and the upper end, respectively. In a gusset-type bag formed by forming a seal portion and an upper end opening, the heat-sealing resin layer comprises a co-extruded multilayer resin film, and further comprises a co-extruded multilayer resin film. At least one layer constituting the laminated resin film is composed of a polypropylene resin layer, and further, on one or both surfaces of the polypropylene resin layer, a mixed resin layer of a polypropylene resin and a polyethylene resin is laminated, and further, A polyethylene-based resin layer is laminated on one or both sides of the mixed resin layer, and the polypropylene-based resin constituting the above-mentioned polypropylene-based resin layer or the mixed resin layer is made of a polypropylene-based resin having excellent melt tension and stretchability. A gusset-type bag comprising a co-extruded multilayer laminated resin film. 2. The gusset-type bag according to claim 1, wherein the bottom seal portion comprises a boat-shaped bottom seal portion. The gusset-type bag according to any one of claims 1 to 2, wherein the upper end opening has a spout. The polypropylene-based resin constituting the polypropylene-based resin layer is made of a block copolymer of propylene and ethylene, or propylene and 1-octene, according to any one of claims 1 to 3, wherein Gazette bag. The gusset according to any one of claims 1 to 4, wherein the polypropylene resin constituting the mixed resin layer comprises a block copolymer of propylene and ethylene or propylene and 1-octene. Mold bag. The gusset-type bag according to any one of claims 1 to 5, wherein the polyethylene resin constituting the mixed resin layer is made of a copolymer of ethylene and 1-octene. The gusset-type bag according to any one of claims 1 to 6, wherein the polyethylene resin constituting the polyethylene resin layer comprises a copolymer of ethylene and 1-octene. 8. The method according to claim 1, wherein the co-extruded multilayer resin film comprises a cylindrical co-extruded multilayer resin film produced by upward air-cooled inflation film forming. A gusset-type bag to be described. The front plate, the rear plate, the left side plate, and the right side plate are at least a base film and a coextruded multilayer laminated resin film, from a laminated material laminated by a dry laminate lamination method or a melt extrusion laminate lamination method. The gusset-type bag according to any one of claims 1 to 8, wherein the gusset-type bag is provided.

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