JP2020040221A - Laminate - Google Patents

Abstract

To provide a laminate for a barrier film excellent in design having a mat layer not taken by fusion bonding applied to a seal bar or the like even when heat seal processing is performed to form a packaging bag.SOLUTION: A laminate 1 comprises a film base material 10 having a first resin layer 11 and a second resin layer 12. The first resin layer 11 contains a matting agent, the second resin layer 12 does not contain a matting agent, and an inorganic oxide vapor deposition layer 14 having a thickness of 5 to 100 nm is laminated on the surface of the film base material 1 on the second resin layer 12 side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a laminate for a barrier film having a design property.

  2. Description of the Related Art Conventionally, a mat layer is generally applied to the surface of a packaging material for the purpose of imparting a design property to a packaging material such as giving a beautiful appearance or originality.

  At this time, the mat layer is formed by applying a mat ink obtained by mixing a mat agent with an ink resin on the outermost surface of the packaging material.

  For example, Patent Document 1 describes that a plastic film is used as a surface substrate, and that a mat coat layer is provided on a part or the entire surface of the plastic film. Further, the mat coat layer is formed of a vinyl chloride / vinyl acetate copolymer resin / acrylic resin. It is stated that it is composed of a polyol-mixed resin.

JP-A-4-102840

  However, when a mat layer is formed on the outermost surface of the packaging material as described above, the mat layer is heat-sealed to a seal bar for heating when heat sealing is performed in forming a packaging bag thereafter. However, there is a problem that frequent cleaning is required or that the removed mat layer may be mixed into the contents as foreign matter.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mat layer which is not removed by being fused to a seal bar even when performing heat sealing. An object of the present invention is to provide a laminate for a barrier film having excellent design properties.

The present invention has been made to solve these problems.
That is, the invention according to claim 1 is a laminate including a film base having a first resin layer and a second resin layer, wherein the first resin layer includes a matting agent, 2 is a laminate, wherein the resin layer does not contain a matting agent, and an inorganic oxide vapor-deposited layer having a thickness of 5 to 100 nm is laminated on the surface of the film substrate on the side of the second resin layer. is there.

  The invention according to claim 2 is characterized in that the surface of the second resin layer has an arithmetic average roughness Ra of 250 nm or less and a maximum height Ry of 2 μm or less when measured by a white light interference measurement method. The laminate according to claim 1, wherein

  The invention according to claim 3 is a composite comprising, as components, a water-soluble polymer and at least one or more of a metal alkoxide, a hydrolyzate thereof, and a polymer thereof on the inorganic oxide vapor deposition layer. The laminate according to claim 1 or 2, wherein a coating layer is formed.

  The invention according to claim 4 is characterized in that the thickness of the first resin layer is not less than 7 μm and not more than 4/5 (80%) of the total thickness of the film substrate. The laminate according to any one of claims 1 to 3.

  By using the laminate of the present invention as a barrier film, there is no fear that the mat layer composed of the first resin layer is taken off by the seal bar during bag making into a packaging bag, and it is possible to impart a design property to the packaging material. It is possible.

It is sectional drawing which shows an example of the laminated body of this invention.

  Hereinafter, embodiments of the present invention will be described in detail. In the following description, reference is made to the drawings as appropriate, but the embodiments described in the drawings are exemplifications of the present invention, and the present invention is not limited to the embodiments described in these drawings.

  FIG. 1 is a cross-sectional view illustrating a configuration example of the laminate of the present invention.

  As shown in FIG. 1, a film substrate (10) used for a laminate (1) according to an embodiment of the present invention includes a first resin layer (11) having a matting agent (13) added to one surface. ) And a second resin layer (12) to which no matting agent is added is provided on the opposite surface.

  Further, an example is shown in which an inorganic oxide deposition layer (14) and a composite coating layer (15) are provided on the second resin layer (12).

  Here, there is no problem even if another layer is provided between the first resin layer (11) and the second resin layer (12).

  Examples of other layers include, but are not limited to, a printing layer, an adhesive layer, an intermediate layer, a printing layer, and the like.

  Examples of the material used for the film substrate (10) include a polyester film such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene terephthalate (PBT); a polyolefin film such as polyethylene and polypropylene; a polystyrene film; Examples thereof include a polyamide film, a polycarbonate film, a polyacrylonitrile film, and a polyimide film. Further, polyvinyl chloride, cellulose, triacetyl cellulose, polyvinyl alcohol, polyurethanes and the like can be mentioned.

  Further, a material having at least one of the above materials as a component, a copolymer component, or a chemically modified product thereof as a component is also exemplified. Among these, the material used for the first resin layer (11) is preferably a material having heat resistance and not sticking or being detached even by heating with a seal bar. A polyethylene terephthalate film or a polyamide film is preferably used.

  As the material of each layer of the film substrate (10), materials having different properties can be used in consideration of suitability as a packaging material, but in consideration of easiness of film formation and post-processing, the same material is used. It is preferable to use a material.

In addition, various well-known additives and stabilizers, for example, an antistatic agent, an ultraviolet inhibitor, a plasticizer, a lubricant, and the like may be appropriately added to each layer of the film substrate (10).

  The overall thickness of the film substrate (10) is not particularly limited, but is practically 3 to 200 μm in consideration of workability when forming an inorganic oxide vapor-deposited layer, a composite coating layer, and the like. Is particularly preferable, and particularly preferably 6 to 30 μm.

  The first resin layer (11) to which the matting agent (13) constituting the film substrate (10) is added will be described.

  The first resin layer (11) is provided to impart a design property to the laminate (1) for a barrier film, and the matting agent (13) is contained in the resin material forming the film substrate (10) as described above. ) Is added.

  The matting agent (13) is a particle for generating a matte feeling by forming irregularities on the surface of the resin material.

  As the matting agent (13) to be added, inorganic fine particles or organic fine particles can be exemplified. Examples of the inorganic fine particles include silica, calcium carbonate, synthetic mica, and titanium oxide. Examples of the organic fine particles include polyethylene fine particles, acrylic fine particles, and urethane fine particles.

  Considering the ease of kneading into the resin material, inorganic fine particles are preferred, and silica is most commonly used.

  The amount of the matting agent (13) is not particularly limited and may be appropriately determined as necessary. However, if the amount is too small, the texture of the mat does not appear and the design cannot be imparted. If the amount is too large, the film breaks during film formation. And so on, making it impossible to produce a uniform film. For this reason, generally, it is preferable to add 5 to 30 parts by weight to 100 parts by weight of the plastic material.

  The size of the fine particles of the matting agent (13) may be appropriately determined, but if it is too small, it is difficult to obtain the effect of the mat, and if it is too large, it is difficult to form a film, so that the particle size is smaller than the thickness of the film. There is a need. Therefore, it is preferable that the average particle size of the fine particles be 2 μm or more and 20 μm or less.

  Various coating layers and printing layers may be provided on such a first resin layer (11).

  Next, the second resin layer (12) provided on the surface of the film substrate (10) opposite to the first resin layer (11) and having no added matting agent will be described. The second resin layer (12) is a layer to which a matting agent is not added, and is a layer constituting a surface on which an inorganic oxide vapor-deposited layer (14) described later is formed.

  In general, since the inorganic oxide vapor-deposited layer (14) is thin and easily cracked, when directly laminated on the first resin layer (11) containing the matting agent (13), the unevenness of the surface is too large. There is a problem that the layer (14) is cracked and sufficient barrier properties are not developed. Therefore, it is necessary to form a second resin layer (12) to which the matting agent (13) is not added on the surface on which the inorganic oxide vapor-deposited layer (14) is to be formed to smooth the surface.

That is, when the surface of the second resin layer (12) of the present invention is measured by the white light interference measurement method, it is necessary that the arithmetic average roughness Ra of the surface is 250 nm or less and the maximum height Ry is 2 μm or less. It is.

  If Ra is larger than 250 nm and Ry is larger than 2 μm, the surface becomes rough. Therefore, when the inorganic oxide vapor-deposited layer (14) is formed thereon, the vapor-deposited layer is cracked and causes a decrease in barrier properties.

  If Ra and Ry are smaller than the above values, there is no problem. However, if they are too small, the slipperiness of the film deteriorates, so that the film may be scratched or cut during roll processing.

  Therefore, it is preferable that Ra has a surface state of 8 nm or more and 250 nm or less and Ry has a surface state of 50 nm or more and 2 μm or less. In order to obtain such a surface state, a lubricant or an anti-blocking agent can be appropriately added to the second resin layer (12).

  In order to make the surface of the second resin layer (12) less susceptible to irregularities on the surface of the first resin layer (11), it is preferable to set the thickness of each layer within a certain ratio range. The ratio of the thickness is when the thickness of the first resin layer (11) is 4 or less with respect to the thickness 1 of the second resin layer (12), or when the film substrate (10) is a multilayer having three or more layers. In consideration of the above, it is preferable that the thickness of the first resin layer (11) is 4/5 (80%) or less with respect to the total thickness of the film substrate (10).

  When the thickness of the first resin layer (11) is more than 4/5 with respect to the total thickness of the film substrate (10), the influence of the unevenness on the surface of the first resin layer (11) causes the second resin layer (12). It appears on the surface, and it is difficult to obtain the desired surface roughness. In consideration of workability, the thickness of the first resin layer (11) is preferably 7 μm or more.

  Next, the inorganic oxide deposited layer (14) will be described in detail. The inorganic oxide deposited layer (14) is made of a deposited film of an inorganic oxide such as aluminum oxide, silicon oxide, tin oxide, magnesium oxide, or a mixture thereof, has transparency, and is a gas barrier against oxygen, water vapor, and the like. Any layer having properties may be used.

  In consideration of durability against various sterilization treatments for the contents after the bag is formed using the laminate of the present invention, among these, aluminum oxide and silicon oxide are particularly preferable. However, the inorganic oxide vapor-deposited layer (14) of the present invention is not limited to the above-described inorganic oxide, and any material can be used as long as it meets the above conditions.

  The optimum thickness of the inorganic oxide vapor-deposited layer (14) varies depending on the type and composition of the inorganic compound used, but is preferably in the range of 5 to 100 nm, and the value is appropriately selected.

  If the thickness is less than 5 nm, a uniform film may not be obtained, or the function as a gas barrier material may not be sufficiently achieved due to insufficient thickness. On the other hand, if the thickness exceeds 100 nm, the inorganic oxide vapor deposited film (14) cannot maintain flexibility, and the inorganic oxide vapor deposited film may be bent or stretched after the film is formed due to external factors. This is a problem because cracks may occur in (14). For this reason, more preferably, it is in the range of 10 to 100 nm.

  As a method for forming the inorganic oxide vapor-deposited layer (14) on the second resin layer (12) of the film substrate (10), any conventionally known method can be used. It can be formed by a method or the like.

  Further, other thin film forming methods such as a sputtering method, an ion plating method, and a plasma vapor deposition method (CVD) can be used. However, in consideration of productivity, the vacuum deposition method is currently the most excellent.

  As a heating means of the vacuum evaporation method, it is preferable to use any one of an electron beam heating method, a resistance heating method, and an induction heating method, but an electron beam heating method is used in consideration of a wide range of selectivity of an evaporation material. Is more preferable.

  Further, in order to improve the adhesion between the inorganic oxide vapor-deposited layer (14) and the second resin layer (12) and the denseness of the vapor-deposited thin film layer, the vapor-deposition is performed using a plasma assist method or an ion beam assist method. Is also possible.

  In addition, in order to improve the transparency of the inorganic oxide vapor-deposited layer (14), reactive vapor deposition in which various gases such as oxygen are blown may be used at the time of vapor deposition.

  A treatment layer or an anchor coat layer may be provided between the film substrate (10) and the inorganic oxide vapor-deposited layer (14) in order to improve the adhesion between them.

  Next, the composite coating layer (15) will be described. The composite coating layer (15) is a coating layer having gas barrier properties, and is mainly composed of an aqueous solution containing a water-soluble polymer and one or more metal alkoxides, a hydrolyzate thereof, or a polymer thereof, or a mixed solution of water / alcohol. It is formed using a coating agent.

  The coating agent is prepared by, for example, dissolving a water-soluble polymer in an aqueous (water or water / alcohol mixture) solvent, mixing the metal alkoxide directly or in advance with a treatment such as hydrolyzing the metal alkoxide. And

  This coating agent is coated on the inorganic oxide vapor-deposited layer (14), and then dried by heating to form a composite coating layer (15). Each component contained in the coating agent will be described in more detail.

  Examples of the water-soluble polymer used for the composite coating layer (15) in the present invention include polyvinyl alcohol, polyvinyl pyrrolidone, starch, methyl cellulose, carboxymethyl cellulose, sodium alginate and the like.

  Above all, when polyvinyl alcohol (hereinafter abbreviated as PVA) is used, gas barrier properties are most excellent, so that it is preferable.

  The PVA referred to here is generally obtained by saponifying polyvinyl acetate. As the PVA, for example, any of so-called partially saponified PVA in which acetic acid groups remain in several tens%, and complete PVA in which only several% of acetic acid groups remain can be used. There is no problem using.

The metal alkoxide is a compound represented by a general formula, M (OR) n (M is a metal such as Si, Ti, Al, and Zr, and R is an alkyl group such as CH ₃ and C ₂ H ₅ ). Specifically, tetraethoxysilane _{[Si (OC 2 H 5)} 4], triisopropoxyaluminum _{[Al (O-2'-C} 3 H 7) 3] , etc., and among them tetraethoxysilane, triiso Propoxy aluminum is preferred because it is relatively stable in aqueous solvents after hydrolysis.

When alkoxysilane is used as the metal alkoxide, for example, a compound represented by Si (OR ¹ ) ₄ or R ² Si (OR ³ ) ₃ or a mixture thereof can be used as the alkoxysilane. . Here, R ¹ and R ³ in (OR ¹ ) and (OR ³ ) represent a CH ₃ group, a C ₂ H ₅ group, a C ₂ H ₄ OCH ₃ group, etc., each of which represents a hydrolyzable group; R ² represents an organic functional group.

  Since the metal oxide film obtained by hydrolyzing and condensing the metal alkoxide is hard, cracks are liable to occur due to external force and strain due to volume reduction during condensation. Therefore, it is very difficult to form this metal oxide film with a uniform thickness without cracks or the like.

  On the other hand, a film formed using a coating agent containing a polymer, a metal alkoxide or a hydrolyzate thereof, and water has higher flexibility than a metal oxide film, and therefore, cracks may occur. I want to. However, in this film, the metal oxides are not microscopically dispersed uniformly, and high gas barrier properties may not be obtained.

  When a water-soluble polymer is used as the polymer, a metal oxide is used during condensation by utilizing a strong hydrogen bond between a hydroxyl group of the polymer and a hydroxyl group of a hydrolyzate of a metal alkoxide. Can be uniformly dispersed. Therefore, gas barrier properties close to those of a metal oxide film can be achieved. Therefore, when such a composite coating layer (15) is formed on the inorganic oxide vapor-deposited layer (14), a much higher gas barrier property can be achieved as compared with the case where they are used alone.

  However, the composite coating layer (15) obtained by using the above-mentioned metal alkoxide or its hydrolyzate, or a coating agent containing a polymer thereof, a water-soluble polymer having a hydroxyl group, and water forms a hydrogen bond. Therefore, when used in a harsh environment, it may swell due to intrusion of water and eventually cause dissolution. Therefore, even if a high gas barrier property can be achieved by laminating the inorganic oxide deposition layer (14) and the composite coating layer (15), the laminate (1) may be severe in a high-temperature and high-humidity environment. Under such conditions, the adhesion and gas barrier properties may easily deteriorate.

On the other hand, when, for example, an alkoxysilane represented by R ² Si (OR ³ ) ₃ is used as a metal alkoxide, a composite coating layer (15) which does not easily swell even when water enters and has excellent water resistance can be obtained. Obtainable. In particular, an organic functional group R ² is a vinyl group, an epoxy group, a methacryloxy group, when a non-water soluble functional group, such as a ureido group and an isocyanate group, can achieve higher water resistance. Organic functional group R ² is vinyl, if a methacryloxy carried out by irradiating the ionizing radiation of ultraviolet light or electron beam or the like in the manufacturing process. In general, water and a catalyst (acid or alkali) are used as a reaction accelerator for hydrolysis of a metal alkoxide.

When two types of metal alkoxides, a tetraalkoxysilane represented by the general formula Si (OR ¹ ) ₄ and a trialkoxysilane represented by the general formula R ² Si (OR ³ ) ₃ , are used, ratio, for example, Si ^(OR _{1) 4} of SiO ₂ reduced mass and _{^{R 2 Si (OR 3) R}} 2 Si (OR 3) to the sum of the ₃ ^R 2 Si _{(OH) 3} reduced mass ₃ ^{R 2} The ratio of the mass in terms of Si (OH) ₃ may be set in a range of 1% to 50%. When less than 1% water resistance is low, the organic functional group R ² exceeds 50% is the gas barrier of the hole, the gas barrier property is lowered.

The mixing ratio between the tetraalkoxysilane represented by the general formula Si (OR ¹ ) ₄ and the trialkoxysilane represented by the general formula R ² Si (OR ³ ) ₃ is such that the above ratio is 5% to 30%. It may be set to be within the range. In this case, it is possible to achieve sufficient water resistance and high barrier property for subjecting the liquid content or the water-containing content to a boiling sterilization treatment or a pressurization / heating sterilization treatment, and further to a long-term storage in a high-temperature and high-humidity environment.

Among the alkoxysilanes represented by the general formula Si (OR ¹ ) ₄ , tetraethoxysilane is a hydrolyzate that can be relatively stably present in an aqueous solvent. Is relatively easy.

Alkoxysilane represented by the general formula Si (OR ¹ ) ₄ and alkoxysilane represented by the general formula R ² Si (OR ³ ) ₃ , which are the components of the coating agent forming the composite coating layer (15), and water The reactive polymers may be mixed in any order. For example, an alkoxysilane represented by the general formula Si (OR ¹ ) ₄ and an alkoxysilane represented by the general formula R ² Si (OR ³ ) ₃ are separately hydrolyzed, and then contain a water-soluble polymer. These may be added to the solution. This method is excellent in dispersibility of silicon oxide and efficiency of hydrolysis.

  The coating agent for forming the composite coating layer (15) includes an improvement in wettability and adhesion to the ink or adhesive of the composite coating layer (15), and the occurrence of cracks due to shrinkage of the composite coating layer (15). In consideration of prevention and the like, an additive may be added as long as the gas barrier property is not impaired. As the additive, for example, an isocyanate compound, a silane coupling agent, a clay mineral such as colloidal silica, smectite, a stabilizer, a colorant, a viscosity modifier, and a mixture thereof can be used.

  When the thickness of the composite coating layer (15) is small, it is difficult to form the composite coating layer (15) as a uniform continuous film, and sufficient gas barrier properties cannot be obtained. When the thickness is large, the film is easily cracked. The thickness of the composite coating layer (15) can be, for example, in the range of 0.01 μm to 50 μm.

  Examples of the coating agent for forming the composite coating layer (15) include a dipping method, a roll coating method, a gravure coating method, a reverse gravure coating method, an air knife coating method, a comma coating method, a die coating method, a screen printing method, and a spray coating method. It can be applied by a gravure offset method or the like. The coating film formed by applying this coating agent can be dried by, for example, a hot air drying method, a hot roll drying method, a high frequency irradiation method, an infrared irradiation method, a UV irradiation method, or a combination thereof.

  The inorganic oxide deposited layer (14) and the composite coating layer (15) may be laminated in two or more layers without any problem. In addition, although it is possible to laminate on both sides of the film substrate (10), when laminated on the first resin layer (11) side having the matting agent (13), gas barrier properties may be reduced. There is.

  Hereinafter, examples of the laminate of the present invention will be specifically described. Note that the present invention is not limited to these examples.

(Example 1)
Silica particles having an average particle diameter of 10 μm as a matting agent were added to the polyethylene terephthalate film so as to be 10 parts by weight of the matting agent with respect to 100 parts by weight of polyethylene terephthalate to form a second resin layer.

  A polyethylene terephthalate film was used for the first resin layer. The thickness of the entire film substrate is 12 μm, and the thickness ratio of the second resin layer / first resin layer is 3.8 / 1 (the ratio of the second resin layer thickness to the total thickness of the film substrate = 79%). Thus, a film substrate was obtained.

  Aluminum oxide having a thickness of 10 nm was deposited on the first resin layer side of the film substrate by a vacuum deposition method using an electron beam heating method to form an inorganic oxide deposited layer, thereby obtaining a laminate.

(Example 2)
As a matting agent to be added to the second resin layer, silica particles having an average particle size of 15 μm were added at 5% by weight based on polyethylene terephthalate, and the thickness ratio of the second resin layer / the first resin layer was 2.5 / A laminate was obtained in the same manner as in Example 1, except that 1 (the ratio of the second resin layer thickness to the total thickness of the film substrate = 71%).

(Example 3)
As a matting agent to be added to the second resin layer, 20% by weight of silica particles having an average particle diameter of 5 μm is added to polyethylene terephthalate, and the thickness ratio of the second resin layer / the first resin layer is 3/1 ( A laminate was obtained in the same manner as in Example 1, except that the ratio of the second resin layer thickness to the total thickness of the film substrate was 75%).

(Comparative Example 1)
A laminate was obtained in the same manner as in Example 1, except that an inorganic oxide vapor-deposited layer was formed on the second resin layer side of the film substrate. (Ratio of second resin layer thickness to total thickness of film substrate = 79%)

(Comparative Example 2)
Except that the thickness ratio of the second resin layer / the first resin layer was set to 7/1 (the ratio of the second resin layer thickness to the total thickness of the film base material = 88%), the same as in Example 1, A laminate was obtained.

<Measurement of surface roughness>
The surface roughness of the surface on which the inorganic oxide vapor-deposited layer is formed was measured using a white light interferometer (VertScan, manufactured by Mitsubishi Chemical System Corporation) at an observation magnification of 5 times, and the arithmetic average roughness Ra and the maximum height were measured. The value of Ry was calculated.

<Oxygen permeability measurement>
The oxygen permeability was measured at a temperature of 30 ° C. and a relative humidity of 70% using an oxygen permeability measuring device (OXTRAN 2/20 manufactured by MOCON). The measuring method is based on JIS K-7126, the B method (isobaric method), and ASTM D3985-81, and the measured value is a unit [cm ³ (STP) / m ² · day · MPa] (where STP = standard state). ).

  Table 1 shows the results of the measurements of the laminates experimentally produced in Examples 1 to 3 and Comparative Examples 1 and 2, respectively.

  From the results of Examples 1 to 3 and Comparative Example 1, when the inorganic oxide vapor-deposited layer (14) was provided on the second resin layer (12) side, the oxygen permeability showed a low value, Although it shows a sufficient gas barrier property, in Comparative Example 1 in which the inorganic oxide vapor-deposited layer (14) is provided on the first resin layer (11) side, the oxygen permeability increases, that is, the gas barrier property decreases. You can see that.

  This is because the surface on which the inorganic oxide deposited layer (14) was provided is the first resin layer (11) side having irregularities on the surface, and cracks and the like were generated in the inorganic oxide deposited layer (14). It can be considered that the gas barrier property has decreased.

Further, from the results of Examples 1 to 3 and Comparative Examples 1 and 2, when the arithmetic average roughness Ra of the surface on which the inorganic oxide vapor-deposited layer (14) is provided is 250 nm or less and the maximum height Ry is 2 μm or less, It shows that the oxygen permeability shows a low value and has sufficient gas barrier properties, whereas when each value is large, the gas barrier properties are low.

  This is because, when the arithmetic average roughness Ra is greater than 250 nm and the maximum height Ry exceeds 2 μm, the surface on which the inorganic oxide deposited layer (14) is provided has large irregularities and the inorganic oxide deposited layer ( It can be considered that the gas barrier property was lowered due to the occurrence of cracks and the like in 14).

  Further, according to the result of Comparative Example 2, even when the inorganic oxide vapor-deposited layer (14) was provided on the second resin layer (12) side, the thickness of the second resin layer (12) was 1 Therefore, the thickness of the first resin layer (11) is larger than 4 or the thickness of the first resin layer (11) is larger than 4/5 (80%) with respect to the total thickness of the film substrate (10). In this case, the oxygen permeability also shows a high value, indicating that the gas barrier property is reduced.

  This is because when the thickness of the second resin layer (12) is not sufficiently provided as compared with the thickness of the first resin layer (11), the surface of the first resin layer (11) has irregularities. , The surface of the second resin layer (12), the arithmetic average roughness Ra is greater than 250 nm, and the maximum height Ry is more than 2 μm. It can be considered that the gas barrier property was lowered due to cracks and the like.

  By using the laminate of the present invention as a barrier film, it is possible to impart a design property to the packaging material without providing a mat coat layer on the outer surface side of the packaging material. Thereby, it is possible to prevent the mat layer from being removed by the heat sealing process at the time of making the bag into the packaging bag, and it is also possible to reduce the number of steps for forming the mat layer.

DESCRIPTION OF SYMBOLS 1 ... Laminated body 10 ... Film base material 11 ... 1st resin layer 12 ... 2nd resin layer 13 ... Matting agent 14 ... Inorganic oxide vapor deposition layer 15 ... Composite coating layer

Claims (4)

A laminate including a film substrate having a first resin layer and a second resin layer,
The first resin layer contains a matting agent, the second resin layer does not contain a matting agent,
A laminate, comprising a film substrate and an inorganic oxide vapor-deposited layer having a thickness of 5 to 100 nm laminated on the second resin layer side surface.   The surface of the second resin layer has an arithmetic average roughness Ra of 250 nm or less and a maximum height Ry of 2 μm or less when measured by a white interference measurement method. Laminate. On the inorganic oxide deposited layer, a water-soluble polymer,
The laminate according to claim 1 or 2, wherein a composite coating layer having at least one of metal alkoxides, hydrolysates thereof, and polymers thereof as a component is formed.   4. The film thickness of the first resin layer is not less than 7 μm and not more than 4/5 (80%) of the total thickness of the film substrate. The laminate according to any one of the above.