JP2004299391A - Multilayered laminated resin film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayered laminated resin film containing a polypropylene resin layer capable of being formed by an ascending air cooling type inflasion molding method, having excellent transparency, improved in opening properties, blocking resistance, slip properties, stiffness or rigidity, impact resistance and the like, excellent in flexibility, heat sealability, laminating characteristics and the like, having content filling and packaging properties, capable of being subjected to high speed film forming processing and enhanced in film forming stability. <P>SOLUTION: This multilayered laminated resin film is constituted so that at least one layer constituting a multilayered laminate comprises a mixed resin layer of a polypropylene resin and a polyethylene resin, a polyethylene resin layer is laminated on one side or both sides of the mixed resin layer and the polypropylene resin constituting the mixed resin layer comprises a polypropylene resin excellent in melt tension and stretchability. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a multilayer laminated resin film, and more specifically, has excellent transparency, and is excellent in opening property, blocking resistance, slipperiness, stiffness / rigidity, impact resistance, and the like. -Excellent sealing and laminating properties, suitable for filling and packaging of contents, capable of high-speed film formation, excellent film formation stability, and low curling property. The present invention relates to a tubular multilayer laminated resin film.

Generally, as a method of forming a polypropylene resin film, (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 for producing a stretched film and a method for producing a non-stretched film depending on whether or not the film is stretched (for example, see Non-Patent Document 1).
Thus, in the above-mentioned method of forming a film of a polypropylene resin, as an inflation forming method, it is common to form a film by cooling with water while taking a formed film downward, and for example, As in the case of the polyethylene resin, a method of forming a film by cooling the film by an air cooling method while pulling the molded film upward has not been put to practical use.
One example of the inflation molding method of a polypropylene resin is as follows. One or both surfaces of the polypropylene resin layer (I) are made of a polypropylene resin and polyethylene having a lower melting point than the polypropylene resin of the resin layer (I). There is a method for producing a polypropylene resin film characterized by laminating an adhesive layer (II) comprising a mixture with a resin based on coextrusion inflation molding (for example, see Patent Document 1).
Supervisor, Kenkichi Murakami "Extrusion Molding" Publishing 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 according to the above-described example is a method of forming a film by cooling the film with water while pulling the molded film downward, and involves a usual inflation molding method. As in the case of resin, this is different from the inflation molding method in which a molded film is cooled by an air cooling system while being pulled upward to form a film.
The inflation molding method of cooling the film by air cooling while forming the film upward while forming the film is not practical because the stability of the bubble to be taken is poor and the molten resin is not rapidly cooled. For this reason, crystallization proceeds excessively, 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 have attempted to produce a multilayer laminated resin film including a polypropylene-based resin layer by an inflation molding method in which the molded film is cooled by an air cooling method while forming the film upward, thereby forming a film. A multilayer laminated resin film containing a polypropylene-based resin layer lacks transparency and is inferior in opening properties, blocking resistance, sliding properties, impact resistance, etc. Further, heat seal properties, lamination In fact, it is inferior in properties and the like, and lacks suitability for filling and packaging the contents, and also lacks curling properties, so that it is impossible to mold a tubular multilayer laminated resin film containing a desired polypropylene-based resin layer.
Therefore, the present invention can be formed into a film by an inflation molding method of forming a film while pulling up a formed film using an air-cooling method, and further, is excellent in transparency, and opening property, blocking resistance, It has good slipperiness, stiffness / rigidity, impact resistance, etc., and also has excellent flexibility, heat seal properties, laminate properties, etc., and has suitability for filling and packaging the contents. An object of the present invention is to provide a tubular multi-layer laminated resin film which can be formed at a high speed, has excellent film forming stability, and has a low curling property.

  The inventor of the present invention has proposed an inflation molding method in which a film is formed while taking up a molded film upward by using an inexpensive air-cooling method in a film forming method of a polypropylene resin, similarly to the case of a polyethylene resin. As a result of various studies, focusing on utilizing the inflation moldability of a polyethylene resin that is formed into a film while pulling the molded film upward using an air cooling method, first, at least one layer constituting the laminate is formed. As a resin, a mixed resin of a polypropylene resin and a polyethylene resin with excellent melt tension and extensibility is used, and as a resin constituting the other layers, film forming is performed while pulling the molded film upward using an air cooling method. A polyethylene resin having excellent inflation moldability is used. For example, a resin mixture of a resin and a polyethylene resin and a polyethylene resin are melt-extruded into a multilayer using, for example, a plurality of extruders and a multilayer circular die, and further, the multilayer molded film is air-cooled. Inflation molding using an inflation molding method in which a film is formed while being drawn upward using a polypropylene resin and a polyethylene resin excellent in melt tension and stretchability at least one layer constituting a laminate. When a tubular multi-layer laminated resin film is produced by laminating a polyethylene-based resin layer of a polyethylene-based resin on one or both sides of the mixed resin layer, The polyethylene-based resin and polypropylene-based resin in the interlayer are mutually melted, and due to their compatibility, affinity, etc., both are strong. In accordance with the inflation moldability of the polyethylene resin to be formed while pulling the molded film upward using the air cooling method, the polypropylene resin also pulls the molded film using the air cooling method upward The film can be formed by the inflation molding method for forming the film, both of which are extremely tightly adhered and exhibit the characteristics of both, excellent in transparency, and opening property, blocking resistance, It has good slipperiness, stiffness / rigidity, impact resistance, etc., and also has excellent flexibility, heat seal properties, laminate properties, etc., and has suitability for filling and packaging the contents. The present invention has been accomplished by finding that a tubular multilayer laminated resin film capable of high-speed film formation, having excellent film formation stability, and having low curling properties can be produced.

  That is, the present invention provides a multilayer structure in which at least one layer constituting the laminate is composed of a mixed resin layer of a polypropylene resin and a polyethylene resin, and further, a polyethylene resin layer is laminated on one or both surfaces of the mixed resin layer. The present invention also relates to a multilayer laminated resin film comprising a laminate, wherein the polypropylene-based resin constituting the mixed resin layer comprises a polypropylene-based resin excellent in melt tension and stretchability.

In the present invention, a polyethylene resin and a polypropylene resin in a layer or between layers are mutually melted, and due to their compatibility, affinity, etc., both are strongly welded to each other, and a molded film is formed using an air cooling method. Following the inflation moldability of a polyethylene resin that forms a film while taking it upward, the polypropylene resin also forms a film by an inflation molding method that forms a film while taking a molded film using an air-cooled system upwards using an air-cooling method. It is possible.
Further, the present invention, both polyethylene-based resin and polypropylene-based resin are extremely tightly adhered and exhibit the properties of both, excellent in transparency, and opening, blocking resistance, slipperiness, It has good stiffness / rigidity, impact resistance, etc., and also has excellent flexibility, heat seal properties, laminate properties, etc., has suitability for filling and packaging of contents, and has high speed film forming. It is advantageous in that it is possible to produce a cylindrical multilayered resin film having excellent film-forming stability and low curling properties.

The present invention will be described in more detail below with reference to the drawings and the like.
First, FIG. 1 and FIG. 2 are schematic cross-sectional views showing the layer configuration of one example of the layer configuration of the multilayer laminated resin film according to the present invention.

First, in the present invention, as the multilayer laminated resin film according to the present invention, for example, as shown in FIG. 1, a film formed by a top-blowing air-cooled inflation method, One layer is composed of a mixed resin layer 1 made of a mixed resin of a polypropylene resin and a polyethylene resin, and a multilayer laminate 3 in which a polyethylene resin layer 2 made of a polyethylene resin is further laminated on one surface of the mixed resin layer 1. Further, there can be exemplified a multilayer laminated resin film A, wherein the polypropylene resin constituting the mixed resin layer is made of a polypropylene resin having excellent melt tension and stretchability.
Further, as shown in FIG. 2, for example, as shown in FIG. 2, the multilayer laminated resin film according to the present invention is formed into a film by a top-blowing air-cooled inflation method to constitute a laminate. At least one layer is composed of a mixed resin layer 1 made of a mixed resin of a polypropylene resin and a polyethylene resin, and further, a polyethylene laminated resin layer 2 and 2 are laminated on both surfaces of the mixed resin layer 1. A multi-layer laminated resin film A ₁ , wherein the polypropylene resin constituting the mixed resin layer 1 is made of a polypropylene resin having excellent melt tension and stretchability. Can be.
The above examples illustrate one or two examples of the multilayer laminated resin film according to the present invention, and the present invention is not limited thereto.For example, the multilayer laminated resin film according to the present invention may be, for example, Depending on the contents to be filled and packaged, the purpose of the packaging, the packaging form, and the like, another base material can be further laminated between the layers.

The multilayer laminated resin film according to the present invention makes use of the advantages of both the polyethylene resin and the polypropylene resin by using the polyethylene resin and the polypropylene resin, and the polyethylene resin mainly exhibits the function of heat sealing. In addition, the polypropylene resin exhibits the function as a core material, and the laminated body composed of the both has excellent transparency, and also has openability, blocking resistance, slipperiness, stiffness / rigidity, and impact resistance. , Etc., are excellent in flexibility, heat sealing properties, laminating properties, etc., have suitability for filling and packaging of contents, and are capable of high-speed film formation, and It is capable of producing a tubular multilayer laminated resin film having excellent film formation stability and low curling properties.
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. Therefore, in the present invention, a polypropylene resin having excellent melt tension and stretchability is selected from a variety of polypropylene resins as the polypropylene resin, and this is combined with a polyethylene resin. The advantages of polyethylene resin such as flexibility and heat sealability, and the advantages of polypropylene resin such as rigidity, strength, etc. Multilayer laminated resin film having allowed is that can produce.

Next, in the present invention, the material constituting the multilayer laminated resin film and the like according to the present invention, its manufacturing method and the like will be described. First, in the present invention, the mixed resin layer constituting the multilayer laminated resin film according to the present invention will be described. As the polypropylene resin having excellent melt tension and stretchability to be formed, basically, a polypropylene homopolymer or a copolymer of propylene and an α-olefin such as ethylene can be used. As the copolymer, a block copolymer or a random copolymer can be used, and it is particularly preferable to use a random copolymer.
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, for example, a polypropylene resin comprising a block of propylene and ethylene, or a block of propylene and 1-octene or a random copolymer is used. Is preferred.

In the above-mentioned polypropylene-based resin comprising a block or random copolymer of propylene and ethylene, or propylene and 1-octene, the density is about 0.9 g / cm ³ , and the melt flow index (MFR) is Those having a range of 0.1 to 2.0 g / 10 min and a melt tension of 100 mN or more (10 cN or more) can be used.
In the above, when the melt flow index (MFR) is less than 0.1 g / 10 minutes, a large load such as an increase in the resin pressure at the time of resin extrusion and a stop of the film forming machine is caused. It is not preferable because it may give the powder, and if it exceeds 2.0 g / 10 minutes, it is not suitable for the top blowing inflation film forming method and is not preferable because it does not blow upward. .
Further, in the above, when the melt tension is less than 100 mN (less than 10 cN), it is not preferable because it is not suitable for the top blown inflation film forming method.

Next, in the present invention, the mixed resin layer constituting the multilayer laminated resin film according to the present invention, or the polyethylene resin forming the polyethylene resin layer, for example, ethylene, propylene, 1-butene, 1- Copolymers with α-olefins such as pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene and others 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 propylene and ethylene, or a copolymer of ethylene and 1-octene.
The copolymer of ethylene and 1-octene has a melt flow rate (MFR) in the range of 0.1 to 4.0 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, it is not preferable because it causes a rise in resin pressure and causes a machine (film forming machine) to stop, and the like. If the MFR exceeds 4.0 g / 10 min, it is not preferable because the top blown inflation film becomes difficult. Further, in the above, if the density is less than 0.900 g / cm ^3, it is not preferable because the reduction of the strain (rigidity) of the entire multilayer laminated film occurs, and the density is 0.930 g / cm ³ . If it exceeds, it is not preferable because it lacks 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, the above-mentioned polypropylene-based resin and polyethylene-based resin are used, and these are used as the main components of the vehicle. If necessary, for example, an antioxidant, an ultraviolet absorber, 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, as well as modifying resins, etc. One or more additives are added, and if necessary, a solvent, a diluent, etc. are added, and the mixture is sufficiently kneaded to form a mixed resin comprising a mixed resin of a polypropylene resin and a polyethylene resin. Prepare the composition.
In the above, the mixing ratio of the polypropylene-based resin and the polyethylene-based resin is preferably 100 to 100% by weight, and the latter is preferably 20 to 80% by weight, more preferably 35 to 65% by weight. Things.
In the above, if the polyethylene resin is less than 20% by weight, more preferably less than 35% by weight, the stiffness (rigidity) increases, but peeling occurs at the interface of each layer of the multilayer film, and the sealing strength and It is not preferable because the practicality is deteriorated, and if it exceeds 80% by weight, furthermore, if it exceeds 65% by weight, the sealing property becomes sticky, but the stiffness (rigidity) decreases. It is undesirable.

  Further, in the present invention, similarly to the above, the above-mentioned polyethylene-based resin is used, and these are used as main components of the vehicle, and if necessary, for example, an antioxidant, an ultraviolet absorber, a 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, as well as modifying resins, etc. , And if necessary, a solvent, a diluent and the like are added, and the mixture is sufficiently kneaded to prepare a polyethylene resin composition comprising a polyethylene resin.

Next, in the present invention, a multi-layer laminate according to the present invention using the mixed resin composition of the above-prepared mixed resin of the polypropylene resin and the polyethylene resin, and the polyethylene resin composition of the polyethylene resin, etc. The method for forming a resin film will be described. As the method for forming a film, for example, a mixed resin composition comprising a mixed resin of a polypropylene resin and a polyethylene resin prepared above, and a polyethylene comprising a polyethylene resin Using a mixed resin composition, the mixed resin composition of the polypropylene resin and the polyethylene resin forms a mixed resin layer that is at least one layer constituting the laminate, and the polyethylene resin composition has the above-mentioned composition. By a mixed resin composition consisting of a mixed resin of polypropylene resin and polyethylene resin As laminated on one or both surfaces of the combined 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, Next, the extruded tube-shaped molten resin is expanded into a bubble shape and taken upward, and at this time, while preventing the bubble from swaying and stabilizing the same, the tube-shaped tube immediately after extrusion is formed. The bubble is blown to the surrounding outer surface to cool and form a film by cooling.
Thus, in the present invention, at least one layer constituting the laminate is formed by forming the cylindrical molded film into a film by using an upward inflation molding method using an air cooling method as described above, so that a polypropylene-based film is formed. It consists of a mixed resin layer of a resin and a polyethylene resin, and on one or both sides of the mixed resin layer of the polypropylene resin and the polyethylene resin, a cylindrical multilayer laminated film in which a polyethylene resin layer is laminated, Furthermore, the multi-layer laminated resin film according to the present invention can be produced by using the polypropylene resin constituting the mixed resin layer as a polypropylene resin having excellent melt tension and stretchability.

Next, the film thickness of each layer of the multilayer laminated resin film according to the present invention produced above will be described. First, the film thickness of the multilayer laminated resin film according to the present invention is about 20 to 150 μm, preferably 30 to 150 μm. About 120 μm is desirable.
In the above, the thickness of the multilayer laminated resin film according to the present invention is about 30 μm, and further, if it is less than 20 μm, it is not preferable because of lack of basic strength, basic physical properties such as heat sealability, On the other hand, if the thickness exceeds about 120 μm, and further exceeds 150 μm, it is not environmentally friendly and is not preferable in terms of cost.
Thus, in the present invention, a mixed resin layer of a mixed resin composition of a polypropylene-based resin and a polyethylene-based resin constituting the multilayer laminated resin film according to the present invention, and polyethylene laminated on one or both sides of the mixed resin layer The thickness of the mixed resin layer of the mixed resin composition of the polypropylene resin and the polyethylene resin is about 10 to 100 μm, preferably about 20 to 80 μm. The thickness of the polyethylene resin layer laminated on one or both surfaces of the mixed resin layer is about 5 to 100 μm, preferably about 10 to 70 μm.
In the above description, when the thickness of the mixed resin layer of the mixed resin composition of the polypropylene-based resin and the polyethylene-based resin is about 20 μm, and further less than 10 μm, the strength, stiffness (rigidity) and the like of the entire film are reduced. On the other hand, when the thickness exceeds about 80 μm, and more than 100 μm, the heat sealability as a multilayer film is lacking, and further, it is not preferable from the viewpoint of cost.
Further, in the above, if the film thickness of the polyethylene resin layer is less than about 10 μm, and more preferably less than 5 μm, it is not preferable because the suitability for heat sealing is lowered. This is not preferred because the basic physical properties such as stiffness (rigidity) are reduced.

The multilayer resin film according to the present invention produced as described above, the polyethylene resin and the polypropylene resin are mutually melted in each layer or in the layers constituting the multilayer resin film, and both are compatible. Affinity, etc., both of which are firmly welded together and follow the inflation moldability of a polyethylene-based resin that forms a film while pulling the molded film upward using an air cooling method to form the core layer A mixed resin layer made of a mixed resin composition of a polypropylene resin and a polyethylene resin can be formed into a film by an inflation molding method in which a molded film using an air-cooling method is pulled upward while forming a film. Thus, in the multilayer laminated resin film according to the present invention, the mixed resin layer of the mixed resin composition of the polypropylene resin and the polyethylene resin, and the polyethylene resin layer are extremely tightly and closely adhered to each other. It has excellent transparency, and has good openability, blocking resistance, slipperiness, stiffness / rigidity, impact resistance, etc., and also has flexibility, heat seal properties, It has excellent laminating properties, is suitable for filling and packaging of contents, is capable of high-speed film formation, is excellent in film formation stability, and has a low curling property. Can be configured.
In particular, the multilayer laminated resin film according to the present invention combines properties such as strength, rigidity, and stiffness of a polypropylene-based resin with flexibility, heat-sealing properties, and the like of a polyethylene-based resin. It is effective, has excellent transparency, and has good openability, blocking resistance, slipperiness, stiffness / rigidity, impact resistance, etc., as well as flexibility, heat seal properties, Excellent laminating properties, little phenomenon such as delamination, no leakage of filled contents, etc., excellent storage and preservability, etc. It is capable of producing suitable and satisfactory packaging products 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 with respect to the multilayer laminated resin film as the heat-sealing material, and when forming the film, it is excellent in film forming stability, and the production cost is reduced. This makes it possible to remarkably reduce the cost and to produce a multilayer laminated resin film as a very useful heat seal material.
Thus, the above-mentioned multilayer laminated resin film according to the present invention is used as a heat-sealing material and, for example, other plastic base materials, paper base materials, metal base materials, cellophane, synthetic paper, By arbitrarily combining with other base materials and the like and laminating, it is possible to produce a laminated material having various layer constitutions, and further, using the laminated material, bag-forming or box-forming it, and Can be manufactured.

Thus, in the present invention, as a plastic substrate as another substrate to be laminated with the multilayer laminated resin film according to the present invention, since this is a basic material constituting a packaging container, A resin film or sheet having excellent properties in terms of chemical, chemical, etc. can be used.
Specifically, for example, polyester resin, polyamide resin, polyaramid resin, polypropylene resin, polycarbonate resin, polyacetal resin, fluorine resin, etc. Sheets 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 that can be held to the minimum necessary for strength, rigidity, etc., and if it is too thick, the cost increases. On the contrary, if it is too thin, strength, rigidity and the like 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, for example, a desired printing pattern such as a character, a figure, a symbol, a pattern, a pattern, etc. is applied to the base film as described above by a front printing or a back printing by a normal printing method. It may be.

Further, in the present invention, the paper substrate to be laminated with the multilayer laminated resin film according to the present invention has moldability, bending resistance, rigidity, etc., for example, strong size exposure or Unbleached paper substrates, paper substrates such as pure white roll paper, kraft paper, paperboard, and processed paper, and the like can be used.
In the above, as the paper substrate constituting the paper layer, those having a basis weight of about 80~600g / m ² position, preferably, it is desirable to use a basis weight of about 100~450g / m ² position.
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.

  In the present invention, on the other surface of the paper base material, a heat-sealing resin film which can be melted and fused to each other by heat, for example, low-density polyethylene, medium-density polyethylene , High density polyethylene, linear (linear) low density polyethylene, polypropylene, ethylene-vinyl acetate copolymer, ionomer resin, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methacryl Polyolefin resins such as acid copolymers, ethylene-propylene copolymers, methylpentene polymers, polyethylene or polypropylene are converted to unsaturated carboxylic acids such as acrylic acid, methacrylic acid, maleic anhydride, fumaric acid, itaconic acid and others. An acid-modified polyolefin resin modified with an acid, or one or more resins such as other resins. Resin film or sheet - can be stacked and. The film or sheet of the above resin can be used in a single layer or a multilayer. The thickness of the film or sheet of the above resin is about 5 μm to 300 μm, preferably 10 μm to 100 μm. Position is desirable.

Next, in the present invention, as another substrate to be laminated with the multilayer laminated resin film according to the present invention, for example, a property of blocking light such as sunlight, or a gas such as water vapor, water, oxygen, or the like. It is possible to use a material having a property that does not transmit the like or the like, or the like, which may be a single base material or a composite base material obtained by combining two or more types of base materials.
Specifically, for example, a resin film having an aluminum foil having a light-shielding property and a barrier property or a resin film having a vapor-deposited film of aluminum thereof, a resin having a vapor-deposited film of an inorganic oxide such as silicon oxide and aluminum oxide having a barrier property. Films or sheets of resin such as low-density polyethylene, medium-density polyethylene, high-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, etc. Resin films or sheets such as polyvinylidene chloride, polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer, nylon MXD6, etc. having gas barrier properties; Of various colored resins having light-shielding properties, which are formed into a film by adding and kneading an agent Or sheet - can be used bets like.
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, an aluminum foil having a thickness of about 5 μm to 30 μm can be used, and an aluminum or inorganic oxide deposited film 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 polyester films, polyamide films, polyolefin films, polyvinyl chloride films, polycarbonate films, polyvinylidene chloride films, polyvinyl alcohol films, and ethylene-acetic acid films. A saponified vinyl copolymer film and others can be used.

Further, in the above, as the inorganic oxide constituting the above-mentioned inorganic oxide vapor-deposited film layer, for example, silicon oxide (SiO _x ), aluminum oxide, indium oxide, tin oxide, zirconium oxide, or the like may be used. it can.
Further, 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, as a method for forming a thin film layer of an inorganic oxide, the 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, when the thickness of the inorganic oxide thin film layer exceeds 1500 °, particularly when it exceeds 2000 °, cracks and the like are liable to be formed in the inorganic oxide thin film layer, thereby causing a risk that the barrier property is reduced. 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 substrate to be laminated on the multilayer laminated resin film according to 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 retention is excellent, and further, A resin film or sheet having a property that does not cause a change in taste, 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 about 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.

Next, in the present invention, a method of manufacturing a laminated material by using the above-described materials and laminating the same with the multilayer laminated resin film according to the present invention will be described. A method of laminating the material, for example, a wet lamination method, a dry lamination method, a solventless dry lamination method, an extrusion lamination method, a co-extrusion lamination method, or the like can be used. .
Thus, in the present invention, when performing the above lamination, the surface of the substrate to be laminated, if necessary, for example, corona discharge treatment, ozone treatment, plasma treatment, flame treatment, and other pretreatments such as It can be applied arbitrarily.
In the present invention, for example, anchor coating agents such as isocyanate (urethane), polyethyleneimine, polybutadiene, and organic titanium, or polyurethane, polyacryl, polyester, epoxy Known anchor coating agents and adhesives, such as adhesives for laminating, such as adhesives for laminates, polyvinyl acetates, celluloses, etc., can be used arbitrarily.
In the present invention, particularly, when laminating another substrate to the multilayer laminated resin film according to the present invention, the outer layer constituting the multilayer laminated resin film according to the present invention, and further, the outer layer constituting the outer layer By providing a corona-treated surface by performing a corona discharge treatment on the outer surface of the outer layer, the laminating strength can be significantly improved.

Thus, in the present invention, a method for making a bag or box using a laminated material produced by arbitrarily laminating another substrate on the multilayer laminated resin film according to the present invention as described above will be described. For example, when the packaging container is a soft packaging bag made of a plastic film or the like, the multilayer material according to the present invention is used as a heat-sealing resin layer as an inner layer using a laminated material produced by the above method. The inner surface of the resin film is opposed to the surface, and the two layers are folded or overlapped, and the peripheral edge is heat-sealed to provide a seal portion to form a bag. be able to.
Thus, as a bag-making method, the above-mentioned laminated material is folded with its inner layer facing the surface, or two of them are overlapped, and the peripheral end of the outer periphery is further sealed with, for example, a side sheet. Seal type, two-way seal type, three-way seal type, four-way seal type, envelope-attached seal type, gasket-attached seal type (pyro-seal type), pleated seal type Various types of packaging containers according to the present invention can be manufactured by heat-sealing with a heat seal such as a flat bottom seal type, a square bottom seal type, and the like.
In addition, for example, a self-supporting packaging bag (standing pouch) and the like can be manufactured. Further, in the present invention, a tube container and the like can be manufactured using the above-described laminated material.
In the above, as a method of the heat seal, for example, known methods such as a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, an ultrasonic seal, and the like are used. Can be performed in the following manner.
In the present invention, for example, a one-piece type, a two-piece type, a spout or the like, or a zipper for opening and closing can be arbitrarily attached to the packaging container as described above.

Next, in the case of a liquid-filled paper container containing a paper base as a packaging container, first, as a laminate, a laminated material in which a paper base is laminated is manufactured, and a blank for manufacturing a desired paper container from this is manufactured. Manufacturing a plate, and then using the blank plate to form a body, a bottom, a head, etc., for example, to manufacture a brick-type, flat-type or gable-top type liquid paper container, etc. Can be.
Further, the shape thereof can be manufactured by any of a rectangular container, a cylindrical paper can such as a round shape, and the like.

In the present invention, packaging containers manufactured as described above include various foods and drinks, adhesives, chemicals such as adhesives, cosmetics, detergents, pharmaceuticals, miscellaneous goods such as chemical warmers, and various other articles such as others. It is used for filling and packaging.
Hereinafter, the present invention will be described more specifically with reference to examples.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting the core layer Functional polypropylene composed of 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 ethylene-1 octene copolymer (ELITE 5100, manufactured by Dow Chemical Japan Co., Ltd., density: 0.920 g / cm ³ ) copolymerized using a single site catalyst (metallocene catalyst) , Melt flow rate, MFR = 0.85 g / 10 min).
(C). Resin Composition Constituting Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion co-extrusion film forming machine, the layer of the resin composition of (a) was 33 μm, A layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 34 μm and a 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition of (a) having a thickness of 33 μm is subjected to corona discharge treatment, and then the two-component curing is performed on the corona treated surface. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting core layer Functional polypropylene composed of 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 Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 25 μm. The layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 50 μm and a layer of the resin composition of (c) to 25 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition having a thickness of 25 μm (a) is subjected to corona discharge treatment. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting core layer Functional polypropylene composed of 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 Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 25 μm. The layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 50 μm and a layer of the resin composition of (c) to 25 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition having a thickness of 25 μm (a) is subjected to corona discharge treatment. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting core layer Functional polypropylene composed of 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 Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 25 μm. The layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 50 μm and a layer of the resin composition of (c) to 25 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition having a thickness of 25 μm (a) is subjected to corona discharge treatment. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer 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) 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.
(B). Resin composition constituting core 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.
(C). Resin Composition Constituting Inner Layer The resin composition prepared in (b) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 34 μm. A layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by co-extruding 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition of (a) having a thickness of 34 μm is subjected to corona discharge treatment, and then the two-component curing is performed on the corona treated surface. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting 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) 50 parts by weight of 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 -Rate, MFR = 0.85 g / 10 min).
(C). Resin Composition Constituting Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion co-extrusion film forming machine, the layer of the resin composition of (a) was 33 μm, A layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 34 μm and a 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition of (a) having a thickness of 33 μm is subjected to corona discharge treatment, and then the two-component curing is performed on the corona treated surface. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting 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) 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 Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 25 μm. The layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 50 μm and a layer of the resin composition of (c) to 25 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition having a thickness of 25 μm (a) is subjected to corona discharge treatment. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting 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) 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 Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 25 μm. The layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 50 μm and a layer of the resin composition of (c) to 25 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition having a thickness of 25 μm (a) is subjected to corona discharge treatment. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 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 prepare a resin composition comprising 100 parts by weight.
(B). Resin composition constituting 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) 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 Inner Layer The resin composition prepared in (a) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 25 μm. The layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by coextruding a layer of the resin composition of (b) to 50 μm and a layer of the resin composition of (c) to 25 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition having a thickness of 25 μm (a) is subjected to corona discharge treatment. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

(1). First, the following resin compositions (a), (b), and (c) were prepared.
(I). Resin composition constituting outer layer 65 parts by weight of 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) And an ethylene-1-octene copolymer (ELITE 5100, manufactured by Dow Chemical Japan Co., Ltd., density = 0.920 g / cm ³ , melt flow rate, copolymerized using a single-site catalyst (metallocene catalyst), (MFR = 0.85 g / 10 min) 35 parts by weight.
(B). Resin composition constituting core 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.
(C). Resin Composition Constituting Inner Layer The resin composition prepared in (b) above was used in the same manner.
(2). Next, using the resin compositions prepared as described above, using a two-type, three-layer top-blowing air-cooled inflation co-extrusion film-forming machine, a layer of the resin composition of (a) was formed to a thickness of 34 μm. A layer composed of a co-extruded inflation film having a total thickness of 100 μm of two types and three layers is formed by co-extruding 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, using the multilayer laminated resin film produced above, the surface of the resin layer of the resin composition of (a) having a thickness of 34 μm is subjected to corona discharge treatment, and then the two-component curing is performed on the corona treated surface. An adhesive layer for polyurethane laminating is applied by a thickness of 3.0 g / m ² (dry) to form an adhesive layer, and then a 12 μm-thick biaxially stretched polyethylene terephthalate is applied to the surface of the adhesive layer. The laminated film according to the present invention was manufactured by dry laminating the film.
(4). Next, two sheets of the laminated material manufactured as described above are prepared, and the surfaces of the multilayer laminated resin films are superimposed on each other, and then the outer peripheral edge is heat sealed three-way to form a seal portion. Then, a packaging bag composed of a three-way seal type flexible packaging bag having an opening above was formed.
Next, water was filled through the opening of the packaging bag manufactured as described above, and then the opening was heat-sealed to form an upper seal portion, thereby manufacturing a packaged product.
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. Thus, a packaged product having excellent filling properties and preservability, etc., and having suitability for filling and packaging the content was obtained, and a satisfactory product was obtained.

[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.

[Experimental example]
The following physical properties were measured for the multilayer laminated resin film according to the present invention manufactured in Examples 1 to 10 and the inflation film manufactured in Comparative Example 1 described above.
(1). Measurement of film thickness This was measured with a μ-meter manufactured by Sony Corporation.
(2). Measurement of Iron / Rigidity This was measured by using a pure bending tester, JTC-911BT / pure bending tester, manufactured by SMT Co., Ltd., to measure the stiffness (bending torque) of each film.
In addition, the average bending strength was used for the measured value of stiffness and rigidity.
(3). Measurement of seal strength This is performed by superposing the surfaces of the polyethylene resin layers constituting the outer layer from the impulse sealer and sealing them, and setting the T-shaped peel strength to 15 mm width and 300 mm / min. It was 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 │ 2.6 × 10 ^-5 │ 25.0 │ ├─────┼──────┼───────────┼────────┤ │ Example 2 │100│3.0 × 10 ^-5 │25.5│├─────┼──────┼───────────┼────── │ │Example 3 │ 100 │ 3.1 × 10 ^-5 │ 26.8 │ │ │Example 4 │ 100 │ 2.6 × 10 ^-5 │ 25.3 │ ─ ────────┤ │ Example ^{5 │ 100 │ 2.8 × 10 -5} │ 26.0 │ ├─────┼──────┼──────── │ │Example 6 │ 100 │ 2.6 × 10 ^-5 │ 25.0 │ │ │Example 7 │ 100 │ 3.0 × 10 ^-5 │ 25.5 │ ├─────┼──────┼ │ Example 8 │ 100 │ 3.1 × 10 ^-5 │ 26.8 │ ├─────┼─── ───┼───────────┼────────┤│Example 9│ 100│2.6 × 10 ^-5 │25.3│ ├───── ││Example 10│ 100│2.8 × 10 ^-5 │ 26.0 │ ├─────┼──────┼───────────┼────────┤ │ Comparative Example 1 │ 100 │ 1.7 × 10 ^-5 │ 20.8 │ └─────┴──────┴───────────┴────────┘

  As is clear from the results shown in Table 1 above, the multilayer laminated resin film according to the present invention has high stiffness and rigidity, and can be put to practical use as a product member such as a packaging material or an industrial material. There was found.

  In the multilayer laminated resin film according to the present invention, the polyethylene-based resin and the polypropylene-based resin and the like in the layers or between the layers are mutually melted, and due to their compatibility, affinity, etc., both of them are firmly welded to each other, and extremely strong. It has a good adhesion, and exhibits both properties, excellent transparency, good openness, blocking resistance, slipperiness, stiffness / rigidity, impact resistance, etc. It has excellent properties, heat-sealing properties, laminating properties, etc., has suitability for filling and packaging the contents, and can be put to practical use as product members such as packaging materials and industrial materials.

FIG. 1 is a schematic cross-sectional view showing a layer configuration of an example of the multilayer laminated resin film according to the present invention. FIG. 2 is a schematic cross-sectional view showing a layer configuration of an example of the multilayer laminated resin film according to the present invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Mixed resin layer 2 Polyethylene resin layer 3 Multilayer laminate 3a Multilayer laminate A Multilayer laminate resin film

Claims (5)

At least one layer constituting the laminate comprises a mixed resin layer of a polypropylene resin and a polyethylene resin, and further comprises a multilayer laminate in which a polyethylene resin layer is laminated on one or both surfaces of the mixed resin layer, Further, the multi-layer laminated resin film is characterized in that the polypropylene resin constituting the mixed resin layer is made of a polypropylene resin having excellent melt tension and stretchability. 2. The multilayer laminated resin film according to claim 1, wherein the polypropylene resin comprises a block copolymer of propylene and ethylene or propylene and 1-octene. The multilayer laminated resin film according to any one of claims 1 to 2, wherein the polyethylene-based resin comprises a copolymer of ethylene and 1-octene. The multilayer resin film according to any one of claims 1 to 3, wherein the polyethylene resin constituting the polyethylene resin layer comprises a copolymer of ethylene and 1-octene. The multilayer laminated resin film according to any one of claims 1 to 4, wherein the multilayer laminated resin film comprises a cylindrical multilayer laminated film produced by upward air-cooled inflation film formation. .

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