JPH06226933A - Laminated film - Google Patents

Abstract

PURPOSE:To obtain a film excellent in transparency, haze and gloss, excellent in flexibility and mechanical strength and excellent in surface wettability. CONSTITUTION:The laminate film comprises at least two layers, i.e., a layer (A) constituted of the resin composition consisting of noncrystalline polyolefin containing at least 50wt.% propylene and/or a 1-butene in an amount of 20-100wt.% and crystalline polypropylene in an amount of 80-0wt.% and a layer (B) constituted of the ethylene resin having crystalling polypropylene and polar group and another layer (B) formed on at least either outer side of the bonded layers (A) and (B).

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a laminated film comprising at least two layers. More specifically, it relates to a laminated film having flexibility, mechanical strength, transparency and surface wettability as a soft film comparable to a soft vinyl chloride film or a vinylon film.

[0002]

2. Description of the Related Art In recent years, a soft vinyl chloride film containing a plasticizer has been widely used as a soft film. However, the soft vinyl chloride resin has social factors such as toxicity and transfer problems due to bleed-out of plasticizers and monomers, and acid rain problem due to generation of hydrogen chloride during incineration.

On the other hand, as a soft film similar to the above-mentioned soft vinyl chloride film, there are those mainly composed of ethylene such as ethylene / vinyl acetate copolymer, low density polyethylene, and ionomer. However, these soft films containing ethylene as a main component are inferior to the soft vinyl chloride film in terms of transparency, haze, gloss and the like, and also have a drawback that they are inferior in heat resistance and stiffness.

[0004]

In view of the above situation, the present invention is a film having good transparency, haze, gloss, etc., excellent flexibility and mechanical strength, and having good surface wettability. For the purpose of providing. In addition, the present invention has various features, such as a packaging film for multicolor cosmetic printing such as food packaging and fiber packaging, a metal protective film coated with an adhesive, an adhesive tape, etc. It is intended to provide a film that is preferably used. As a result of intensive studies conducted by the inventors for the above purpose, an amorphous polyolefin having a specific composition, or a layer formed by mixing the amorphous polyolefin and crystalline polypropylene in a predetermined ratio, and crystalline polypropylene A laminated film composed of a layer made of an ethylene resin having a polar group,
The present invention has been completed by finding that a film in which crystalline polypropylene and an ethylene resin having a polar group constitutes at least one of the outermost layers of the film is suitable for the above purpose.

[0005]

According to the present invention, (A)
20 to 100% by weight of an amorphous polyolefin having a propylene and / or butene-1 component content of 50% by weight or more
And a film made of a resin composition containing 80 to 0% by weight of crystalline polypropylene and (B) at least two layers of a crystalline polypropylene and an ethylene resin having a polar group. Further, there is provided a laminated film in which at least one of both outer surface layers is composed of the layer (B). A multilayer film in which both outer layers of the layer (A) are layers made of crystalline polypropylene has already been filed by the same applicant as Japanese Patent Application No. 3-24123.
No. 8 has been filed. The present invention was obtained by further studying the above invention.

[0006]

The laminated film of the present invention is constituted as described above and has a layer composed of amorphous polypropylene containing propylene and / or butene-1 and crystalline polypropylene, crystalline polypropylene and ethylene having a polar group. By forming a layered composite with a layer made of a system resin by coextrusion or laminating, a film having excellent transparency, haze and gloss, and excellent flexibility, mechanical strength and surface wettability can be obtained.

The present invention will be described in detail below. The amorphous polyolefin (hereinafter referred to as amorphous polyolefin) used in the layer (A) of the present invention is an amorphous olefin having a propylene and / or butene-1 content of 50% by weight or more. Any polymer may be used. For example,
Amorphous polypropylene or polybutene-1 or a copolymer of propylene or butene-1 and other α-olefin can be used. When the content of the propylene and / or butene-1 component in the amorphous polyolefin is less than 50% by weight, the compatibility with the crystalline polypropylene decreases, which is not preferable.

The above-mentioned amorphous polyolefin means boiling n-
Heptane insoluble matter, that is, Soxhlet extractable insoluble matter by boiling n-heptane is 70% by weight or less, preferably 6
It is 0% by weight or less. When the boiling n-heptane insoluble content is more than 70% by weight, the ratio of the amorphous portion is small and it is not possible to impart sufficient flexibility to the film obtained. The above-mentioned amorphous polyolefin of the layer (A) preferably has a number average molecular weight of 1,000.
~ 200,000, more preferably 1,500 to 10
It is 10,000. When the number average molecular weight exceeds 200,000, it is difficult to form a film, and when the number average molecular weight is less than 1,000, the mechanical strength decreases. In the present invention, the amorphous polyolefin may be used alone or in combination of two or more.

As the amorphous polypropylene, atactic polypropylene produced as a by-product during the production of crystalline polypropylene may be used, or it may be produced from raw materials and used. Also, propylene and / or butene-1 and other α
-Copolymers with olefins are specified propylene and / or
Alternatively, the butene-1 component may be produced by the intended use from the raw material so as to be used. In the case of intended production, for example, it can be obtained by polymerizing a raw material monomer in the presence of hydrogen and / or in the absence of hydrogen using a titanium-supported catalyst supported on magnesium chloride and triethylaluminum. From the viewpoint of the stability of raw material supply and the stability of quality,
It is preferable to use a predetermined amorphous polyolefin produced by the purpose. Also, if there is a suitable suitable commercial product,
A commercially available product can be appropriately selected and used.

As the amorphous polyolefin of the layer (A) of the present invention, specifically, polypropylene, propylene / ethylene copolymer, propylene / butene-1 copolymer having predetermined characteristics such as the above-mentioned propylene component content. , Propylene / butene-1 / ethylene-3 terpolymer, propylene / hexene-1 / octene-1 / 3 terpolymer, propylene / hexene-1 / 4-methylpentene-1 / 3 terpolymer, etc. The amorphous polyolefin whose main component is the propylene component of In addition, polybutene-1, butene-1 having predetermined characteristics such as the content of butene-1 component
Ethylene copolymer, butene-1 / propylene copolymer,
Butene-1, propylene, ethylene terpolymer, butene-1, hexene-1, octene-1, terpolymer, butene-1, hexene-1,4-methylpentene-
An amorphous polyolefin containing a butene-1 component as a main component such as a 1-3 terpolymer may also be used. When the amorphous polyolefin is a propylene / ethylene copolymer, the ethylene component content is 0 to 30% by weight, preferably 1 to 20.
Weight% is desirable. Ethylene component content is 30
If it is more than wt%, the resulting film becomes too soft.

When the amorphous polyolefin of the layer (A) of the present invention is a propylene / butene-1 copolymer, a copolymer containing propylene as a main component and a copolymer containing butene-1 as a main component are used. However, in both cases, tensile elongation and cohesive force are large,
It is preferably used as the amorphous polyolefin of the layer (A). Specifically, for example, Lexen of the United States
Commercially available products such as e) company's REXTAC can be used.

The crystalline polypropylene used in the layer (A) of the present invention includes polypropylene which is usually commercially available for extrusion molding, injection molding, blow molding, etc., and is a boiling n-heptane-insoluble isotactic polypropylene. Say. In this case, it may be a propylene homopolymer or a copolymer of isotactic polypropylene having stereoregularity and another α-olefin.
The crystalline polypropylene may be a commercially available product, or may be produced and used. The method for producing crystalline polypropylene is not particularly limited and can be appropriately selected and applied from conventional methods for producing crystalline polypropylene.

The α-olefin used for the copolymerization with the crystalline polypropylene is an α-olefin having 2 to 8 carbon atoms.
-Olefins such as ethylene, butene-1, pentene-1, hexene-1, heptene-1, octene-1 etc. are preferred. Among these, ethylene or butene-1 is particularly preferable.

In the present invention, the crystalline polypropylene is preferably a propylene homopolymer, a propylene / ethylene random copolymer or a block copolymer containing 30% by weight or less of an ethylene component, preferably 1 to 25% by weight. Examples thereof include a random copolymer and a block copolymer of propylene / butene-1 containing 20% by weight or less of butene-1. Among these, a copolymer of ethylene or butene-1 and propylene is particularly preferable in terms of applications such as a film or sheet of the resin composition of the present invention. The crystalline polypropylene of the layer (A) can be used alone or in combination of two or more.

Furthermore, the amorphous polyolefin and / or crystalline polypropylene of the layer (A) in the present invention is
A modified product can be used. The above-mentioned amorphous polyolefin or crystalline polypropylene is used as an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, ethacrylic acid, maleic acid, fumaric acid or itaconic acid, and / or
Alternatively, they may be modified with an ester thereof, an acid anhydride, a derivative thereof such as a metal salt, an amide of an unsaturated compound, an amino compound, glycidyl methacrylate, hydroxymethacrylate or the like. Of these modified products,
Those modified with maleic anhydride or itaconic anhydride are preferably used, and those modified with maleic anhydride are more preferably used.

In the present invention, the method for preparing the resin composition in which the amorphous polyolefin (A) and the crystalline polypropylene are blended is not particularly limited, and is conventionally used in the conventional polypropylene composition manufacturing method. It can be carried out by heating and melting and kneading using a known method, for example, a kneader, a Banbury mixer, a kneader such as a roll, a single-screw or twin-screw extruder, and the like. Further, in the present invention, the above (A)
Various additives, fillers such as heat stabilizers, antioxidants, light stabilizers, antistatic agents, lubricants, nucleating agents, flame retardants, pigments or dyes, carbonic acid depending on the resin composition constituting the layer as desired. Calcium, calcium sulfate, barium sulfate, magnesium hydroxide, mica, talc, clay and the like can be added. Furthermore, other thermoplastic resins, thermoplastic elastomers, rubbers and the like can be blended as necessary, and these can also be crosslinked and blended. Particularly when imparting flame retardancy, magnesium hydroxide and magnesium carbonate are added to the multilayer film in an amount of 20 to 60.
Parts by weight are added.

The resin composition of the layer (A) of the present invention comprises the above-mentioned amorphous polyolefin alone or the above-mentioned amorphous polyolefin and crystalline polypropylene, and the amorphous polyolefin is 20 to 100% by weight, preferably 25-100
It can be obtained by blending it so that it will be wt%. If the amorphous polyolefin is less than 20% by weight, sufficient flexibility cannot be obtained.

The crystalline polypropylene used in the layer (B) of the present invention may be the same as the crystalline polypropylene used in the layer (A), and in particular, in order to bring out the characteristics of the soft film. It is preferable to use a propylene-based random copolymer having a melting point of 150 ° C. or lower.

The ethylene-based resin having a polar group to be incorporated in the layer (B) of the present invention may be a copolymer of ethylene and a vinyl monomer having a polar group, and the ethylene-based resin may have a polar group. The vinyl monomer may be graft-polymerized. As the former, ethylene
Vinyl acetate copolymer, ethylene / acrylic acid copolymer,
Use of ethylene / ethyl acrylate copolymer, ethylene / methyl methyl acrylate copolymer, glycidyl methacrylate and other ethylene and unsaturated acid, unsaturated acid ester and its ionomer copolymer or multi-component copolymer You can Of course, two or more copolymers or multi-component copolymers may be mixed and used. As the latter, for example, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, ethacrylic acid, maleic acid, fumaric acid, itaconic acid and / or their esters, acid anhydrides, and their derivatives such as metal salts are used. A modified product such as graft modification can be used. Among these modified products, those modified with maleic anhydride and itaconic anhydride are preferably used,
More preferably, those modified with maleic anhydride are used.

The hardness of the ethylene resin of the layer (B) of the present invention is not particularly limited, but a Shore D hardness of 50 or less is preferable from the viewpoint of being used as a part of a soft film. The blending ratio of the crystalline polypropylene and the polar group-containing ethylene resin in the layer (B) of the present invention is not particularly limited, but 98:
2 to 50:50 is preferable, and more preferably 95: 5 to
The range is 60:40. In addition, the concentration of the monomer containing a polar group contained in the ethylene-based resin or the concentration of the graft-modified acid, etc., with respect to the resin layer of the entire (B) layer, from the viewpoint of exerting a wetting effect and an adhesive effect on the film surface , 0.
01 to 30% by weight is preferable, and further 0.5 to 20
Weight percent is preferred.

The laminated film of the present invention has the above-mentioned (A).
Usually, the layers and the layer (B) are alternately laminated, and the number of layers of the layers (A) and (B) to be laminated is not particularly limited, but the layer is composed of at least two layers, that is, the outermost layer, that is, At least one of the layers forming both outer surfaces is (B) above.
Be composed of layers. For example, (B) / (A)
Or (B) / (A) / (B) or (B) / (A) /
The laminated film can be constituted by a laminated combination such as (B) / (A) / (B), and is generally (B) /
A laminated film having a three-layer structure composed of a combination of (A) / (B) is used. Further, in the case of a shape such as (B) / (A), a resin other than the (B) layer may be used outside the (A) layer to form a laminated film.

In the present invention, the layer (A) contributes to impart flexibility to the entire film, and by containing crystalline polypropylene, heat resistance and elasticity of the film can be obtained. However, the amorphous polyolefin used has strong surface tackiness, and particularly when it has a low molecular weight, the surface tackiness is remarkable. On the other hand, the layer (B) is a layer that contributes to the flexibility of the film, has no surface tackiness, and has polar groups exposed on the surface, and is therefore excellent in adhesive application and multicolor / complex printability. Therefore, as described above, the layer (B) constitutes at least one outer layer,
Since the layer (A) constitutes the inner layer side, at least one of the layers can be a flexible film having no surface tackiness.
In the laminated film of the present invention, another thermoplastic resin layer, for example, nylon or EVAL for imparting a gas barrier may be laminated and inserted between the (A) layer and the (B) layer.

In the present invention, the thickness of each layer constituting the laminated film is not particularly limited and can be arbitrarily selected. Usually, each layer is about 2-1000 μm
Is formed in the range. Further, the thickness ratio of the (A) layer and the (B) layer is not particularly limited. Preferably, as described above, the (A) layer contributes to the flexibility of the film,
Since the (B) layer has a function of preventing surface tackiness, the total thickness of the (A) layers, which is the total thickness of the (A) layers constituting the film, is 20 to 99% of the laminated film thickness, and It is preferably configured to be 30 to 95%.

The method for producing the laminated film of the present invention is not particularly limited. For example, a coextrusion laminating method, a lamination method, a dry lamination method or the like can be used. Of these, the coextrusion laminating method in which melt adhesion is performed is preferable. Specifically, for example, a method of melt-extruding using an extruder suitable for the number of laminated layers, laminating in a molten state by a known method such as a T-die method or an inflation method, and then cooling with a cooling roll, water age or air cooling is used. It can be used as a laminated film.

The laminated film of the present invention may be surface-treated in order to improve printability, laminating and pressure-sensitive adhesive coating properties. Examples of the surface treatment method include corona discharge treatment, plasma treatment, flame treatment, acid treatment and the like, and any method can be used in the present invention.
Since continuous processing is possible and can be easily performed before the winding step in the film manufacturing process, plasma processing,
Flame treatment and corona discharge treatment are preferable, and among these, corona discharge treatment is most preferable from the viewpoint of simplicity. Further, the present laminated film can be subjected to uniaxial or biaxial stretching processing.

The laminated film of the present invention is laminated, cooled, and solidified as described above, optionally treated as described above, and then wound up to the next step, for example, printing, laminating, adhesive. It can be used for the intended purpose through secondary processing steps such as coating and heat sealing. The laminated film of the present invention is applicable by itself in various applications and is useful, and further laminated with polyester, nylon, stretched polypropylene film or the like to obtain its mechanical strength,
It is also possible to improve functions such as gas barrier properties and printing performance.

[0027]

EXAMPLES The present invention will be described in detail below with reference to examples. However, the present invention is not limited to the following examples. In the following examples of the present invention, the measurement of each inspection item was performed by the following method.

[Tensile Properties] A tensile test was conducted according to JIS-Z17.
02, (1) Tensile yield strength (kg / c
m ² ), (2) tensile fracture strength (kg / cm ² ), (3) tensile elongation (%), (4) tensile modulus (kg / cm ² ) 4
The items were evaluated. [Haze: Haze (%)] The haze was measured according to ASTM D1003. [Wet strength] A film that has been corona-treated at a voltage of 100 V is coated with a wetness index standard solution (manufactured by Kishida Chemical Co., Ltd.) in a width of 1 cm, and after 2 seconds, the highest value of the number of the wetness index standard solution that remains in the coating width of 1 cm is applied. The wet strength (dyne / cm) was used. (If the wet strength is small, the coating width will be narrowed due to the interfacial tension after 2 seconds.) [Adhesiveness] Commercially available cellophane tape (manufactured by Nichiban Co., Ltd.) is adhered to the corona-treated (100 V voltage) film surface. An adhesive sample was prepared, and the adhesive strength was measured by T peel (crosshead speed 200 mm / min, test piece 24 mm width).

Example 1 [Preparation of resin composition for layer (A)] As a resin composition constituting the layer (A), the density was 0.86 g / cm ³ , the propylene content was 65% by weight, and the butene-1 content was 35. Amorphous polyolefin having a weight% and a melt viscosity of 10,000 cps (190 ° C.) (manufactured by Lexen, trade name REXTAC RT278)
0) and a crystalline polypropylene (trade name B301H, manufactured by Ube Industries, Ltd.) having a density of 0.90 g / cm ³ and a melt flow rate (MFR) (230 ° C.) = 1.0 g / 10 min. Mix in a weight ratio of 50 and 30 at a temperature of 200 ° C.
A resin composition prepared by melt-kneading for 1 minute was used.

[Molding of Laminated Film] The resin composition prepared above is used in the layer (A) and has a density of 0.91 g / c.
m ³ , melt flow rate (MFR) (230 ° C) = 9
g / 10 minutes, crystalline polypropylene having a melting point of 138 ° C. (manufactured by Ube Industries, Ltd., product name RF395), melt index (MI) (190 ° C.) = 150, vinyl acetate content 2
A resin composition prepared by mixing 8% ethylene-vinyl acetate copolymer (EVA) (manufactured by Ube Industries, Ltd., trade name Z289) in a weight ratio of 90/10 and melt-kneading with an extruder (B). Used in layers. Outer layer / middle layer / inner layer (B) / (A) /
(B) had the thickness ratio shown in Table 1, and three coextruded extruders each having three independent layers and a three-layer die connected thereto were used to co-extrude the melted three layers, followed by air ring and water. A sizing ring was used for rapid cooling, blow-down molding was performed on a tubular film, and immediately rolled up to obtain a three-layer laminated film having the total thickness shown in Table 1. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Example 2 The resin composition used in the layer (B) was prepared by mixing crystalline polypropylene and ethylene / vinyl acetate copolymer in a mixing ratio of 80 /
Table 1 was prepared in the same manner as in Example 1 except that it was prepared as Table 20.
A three-layer laminated film having the total thickness shown in was obtained. Obtained 3
The properties of the layer-laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Example 3 The resin composition used for the layer (A) is shown in Table 1 in the same manner as in Example 1 except that the mixing ratio of the amorphous polypropylene and the crystalline polypropylene was 70/30. A three-layer laminated film of full thickness was obtained. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Example 4 The resin composition used in the layer (B) was prepared by mixing the crystalline polypropylene and the ethylene / vinyl acetate copolymer at a mixing ratio of 85 /
A three-layer laminated film having the total thickness shown in Table 1 was obtained in the same manner as in Example 3 except that the number was 15. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Example 5 The resin composition used in the layer (B) was prepared by mixing crystalline polypropylene and ethylene / vinyl acetate copolymer in a mixing ratio of 80 /
A three-layer laminated film having the total thickness shown in Table 1 was obtained in the same manner as in Example 3 except that the number was changed to 20. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Example 6 A resin composition used for the layer (A) was prepared by mixing crystalline polypropylene and polybutene (trade name: M248, manufactured by Mitsui Petrochemical Co., Ltd.).
A three-layer laminate having the total thickness shown in Table 1 in the same manner as in Example 1 except that the mixing ratio of 1) was 50/50, the mixture was prepared by melt-kneading with an extruder and used as an intermediate layer of the laminated film. I got a film. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Comparative Example 1 A resin having a total thickness shown in Table 1 was prepared in the same manner as in Example 1 except that the resin used for the layer (B) was crystalline polypropylene (trade name RF395 manufactured by Ube Industries, Ltd.). A three-layer laminated film was obtained. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Comparative Example 2 Except that the resin used for the layer (B) was crystalline polypropylene (manufactured by Ube Industries, Ltd., trade name RF395), the total thickness shown in Table 1 was obtained in the same manner as in Example 3. A three-layer laminated film was obtained. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

Comparative Example 3 A resin having the same total thickness as shown in Table 1 was prepared in the same manner as in Example 6 except that the resin used for the layer (B) was crystalline polypropylene (trade name: RF395 manufactured by Ube Industries, Ltd.). A three-layer laminated film was obtained. The properties of the obtained three-layer laminated film were measured, and the results are shown in Table 1. The film composition is shown in Table 2.

[0039]

[Table 1]

[0040]

[Table 2]

From the above Examples and Comparative Examples, the three-layer laminated film comprising the (A) layer and the (B) layer of the present invention is more flexible than the films of the Comparative Examples, and has a better wetting strength and adhesiveness. It turns out to be excellent.

[0042]

INDUSTRIAL APPLICABILITY The laminated film of the present invention is a soft film having good transparency, haze and gloss, excellent flexibility and mechanical strength, and good wettability on the surface. It can be applied to various applications in place of the soft vinyl chloride film that has become.

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[Procedure amendment]

[Submission date] October 19, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

When the amorphous polyolefin of the layer (A) of the present invention is a propylene / butene-1 copolymer, a copolymer containing propylene as a main component and a copolymer containing butene-1 as a main component. , Propylene and butene-1 are the main components. It is desirable that these main components are 50% by weight or more and the remaining components are less than 50% by weight, preferably 1 to 45% by weight, more preferably 5 to 44% by weight. propylene·
All of the butene-1 copolymers have large tensile elongation, impact resilience, and cohesive force, and can be optionally used as the amorphous polyolefin of the layer (A). Specifically, for example, a commercially available product such as REXTAC manufactured by Rexene, USA can be used.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0019

[Correction method] Change

[Correction content]

The ethylene-based resin having a polar group to be incorporated in the layer (B) of the present invention may be a copolymer of ethylene and a vinyl monomer having a polar group, and the ethylene-based resin may have a polar group. The vinyl monomer may be graft-polymerized. As the former, ethylene
Vinyl acetate copolymer, ethylene / acrylic acid copolymer,
Copolymerization of ethylene with ethylene / ethyl acrylate copolymer, ethylene / methyl methacrylate copolymer, ethylene / glycidyl methacrylate, ionomer, etc. with unsaturated acids, unsaturated acid esters and unsaturated carboxylic acid metal salts Coalescence or multi-component copolymers can be used. Of course, two or more copolymers or multi-component copolymers may be mixed and used. As the latter, for example, acrylic acid, methacrylic acid, ethacrylic acid, maleic acid, fumaric acid,
A modified product such as graft modification can be used using an unsaturated carboxylic acid such as itaconic acid and / or an ester thereof, an acid anhydride, or a derivative thereof such as a metal salt. Among these modified products, those modified with maleic anhydride or itaconic anhydride are preferably used, and those modified with maleic anhydride are more preferably used.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] 0022

[Correction method] Change

[Correction content]

In the present invention, the layer (A) contributes to impart flexibility to the entire film, and by containing crystalline polypropylene, heat resistance and elasticity of the film can be obtained. However, the amorphous polyolefin used has strong surface tackiness, and particularly when it has a low molecular weight, the surface tackiness is remarkable. On the other hand, the layer (B) is a layer that contributes to the flexibility of the film, has no surface tackiness, and has a polar group exposed on the surface, and therefore is excellent in adhesive coating and multicolor / complex printing characteristics. Therefore, as described above, the layer (B) constitutes at least one outer layer,
Since the layer (A) constitutes the inner layer side, at least one of the layers can be a flexible film having no surface tackiness.
Further, the laminated film of the present invention comprises another thermoplastic resin layer between the (A) layer and the (B) layer, for example, nylon, polyvinyl alcohol, saponified ethylene / vinyl acetate copolymer for providing a gas barrier. , Polyester, etc. may be laminated and inserted.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

Comparative Example 3 A resin having a total thickness shown in Table 1 was prepared in the same manner as in Example 6 except that the resin used for the layer (B) was crystalline polypropylene (trade name: RF395 manufactured by Ube Industries, Ltd.). A three-layer laminated film was obtained. The characteristics of the obtained three-layer laminated film were measured,
The results are shown in Table 1. The film composition is shown in Table 2. Comparative Example 4 Using the three-layer laminated film molding apparatus used in Example 1, crystalline polypropylene (manufactured by Ube Industries, Ltd., trade name RF3)
95) was melt co-extruded from each extruder, except that
A film of 60 μm was obtained in the same manner as in Example 1. The characteristics of the obtained film were measured, and the results are shown in Table 1.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

[0039]

[Table 1]

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takafumi Manabe 3-1 Chikko Shinmachi, Sakai City, Osaka Prefecture Ube Industries Ltd. Sakai Plant (72) Inventor, Mukoo Emoto 3-1, Chikko Shinmachi, Sakai City, Osaka Prefecture Ube Industries Ltd. Company Sakai Factory (72) Inventor Isao Nagayasu 3-1 Chikko Shinmachi, Sakai City, Osaka Prefecture Ube Industries Ltd. Sakai Factory

Claims (1)

[Claims] 1. (A) Propylene and / or butene-1
20 to 100% by weight of amorphous polyolefin having a component content of 50% by weight or more and 80 to 80% of crystalline polypropylene
A film formed by laminating at least two layers of a resin composition containing 0% by weight and (B) a layer containing crystalline polypropylene and an ethylene resin having a polar group, and both outer surface layers. At least one layer is the above (B)
A laminated film composed of layers.