JP2023002620A - Laminated film and bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bag capable of efficiently preventing odor of a stored article from leaking outsidel, and a laminated film capable of being suitably used in production of a bag.

SOLUTION: A laminated film of the present invention comprises a first layer mainly made of polyethylene and a second layer mainly made of a cyclic olefin resin and made of a material containing polyethylene and is characterized by containing a polyamide resin and a deodorant agent. In addition to the first layer and the second layer, it is preferable to further have a third layer mainly made of polyethylene and made of a material containing the deodorant.

SELECTED DRAWING: None

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to laminated films and bags.

Garbage, used paper diapers, and other wastes are usually disposed of in plastic bags.

However, with plastic bags, there is a problem that the opening is tied and the odor of the contents leaks to the outside.

In order to solve such problems, zeolite having a base substitution capacity (meq/100 g) of at least 100 and a pore surface area of at least 6.0 m ² /g was crushed to a maximum particle size of 10 μm or less and 200 A mixture obtained by uniformly dispersing and mixing zeolite powder material calcined at 350°C to 350°C in polyethylene or polypropylene resin using a dispersing agent consisting of low molecular weight polyethylene or polypropylene with a melting point of 40 to 80°C and liquid paraffin. A deodorizing film material has been proposed which is formed by forming a raw material into a film (see Patent Document 1).

However, even when the odor-sealing bag manufactured using the deodorizing film material as described above is used, it is difficult to sufficiently prevent the odor of the contents from escaping to the outside.

JP-A-11-35077

An object of the present invention is to provide a bag capable of effectively preventing the odor of stored items from escaping to the outside, and to provide a laminated film that can be suitably used for manufacturing the bag. to do.

Such objects are achieved by the present invention described in (1) to (10) below.
(1) a first layer composed primarily of polyethylene;
A second layer mainly composed of a cyclic olefin resin and composed of a material containing polyethylene,
A laminated film comprising a polyamide resin and a deodorant.

(2) In addition to the first layer and the second layer, the above (1) further has a third layer mainly made of polyethylene and made of a material containing the deodorant. Laminated film according to.

(3) The laminated film according to (2) above, wherein the third layer contains the polyamide resin.

(4) The laminated film according to (3) above, wherein the content of the polyamide resin in the third layer is 0.1% by mass or more and 32% by mass or less.

(5) The laminated film according to any one of (1) to (4) above, wherein the first layer contains the polyamide resin.

(6) The laminated film according to (5) above, wherein the content of the polyamide resin in the first layer is 0.1% by mass or more and 40% by mass or less.

(7) The laminated film according to any one of (1) to (6) above, wherein the second layer contains the polyamide resin.

(8) The laminated film according to (7) above, wherein the content of the polyamide resin in the second layer is 0.1% by mass or more and 17% by mass or less.

(9) The laminated film according to any one of (1) to (8) above, wherein the polyamide resin is a recycled plastic.

(10) A bag using the laminated film according to any one of (1) to (9) above.

According to the present invention, it is possible to provide a bag capable of effectively preventing the odor of stored items from escaping to the outside, and to provide a laminated film that can be suitably used for manufacturing the bag. can do.

FIG. 1 is a longitudinal sectional view schematically showing one example of the laminated film of the present invention. FIG. 2 is a perspective view schematically showing an example of the bag of the present invention. FIG. 3 is a perspective view schematically showing another example of the bag of the present invention. FIG. 4 is a longitudinal sectional view schematically showing another example of the laminated film of the present invention.

Preferred embodiments of the present invention are described in detail below.
[1] Laminated Film First, the laminated film according to the present invention will be described.

FIG. 1 is a longitudinal sectional view schematically showing one example of the laminated film of the present invention.
The laminated film of the present invention comprises a first layer composed mainly of polyethylene and a second layer composed mainly of a cyclic olefin resin and a material containing polyethylene, and contains a deodorant. It is characterized by

As a result, for example, it is possible to provide a laminated film that can be suitably used for manufacturing a bag that can effectively prevent the odor of stored items from escaping to the outside. In particular, the above-described excellent effects can be exhibited for various odors such as excrement odor, sweat odor, aging odor, and mold odor. In addition, even when it comes into contact with an alkaline substance such as ammonia, an acidic substance such as acetic acid, or the like, the above effects can be stably exhibited.

It is believed that such excellent effects are obtained for the following reasons. That is, by containing the deodorant, the odor components of the stored items can be suitably captured, and the content of the volatilized odor components in the bag itself can be reduced. By providing the second layer composed of a material containing polyethylene, the second layer blocks the odor of the stored items and prevents the odor of the stored items from permeating through the second layer. can be effectively prevented. In particular, these effects act synergistically to effectively prevent the odor of stored items from leaking out of the bag. Further, by having the first layer mainly composed of polyethylene, for example, the first layer can function as a protective layer such as the second layer. Moreover, the first layer has excellent adhesion to the second layer, and can effectively prevent unintentional delamination or the like between them. Polyethylene is also excellent in deodorant solubility, dispersibility, etc., which will be described in detail later. As described above, the durability of the laminated film and the bag can be improved, and the effect of preventing the odor of the stored items from leaking out to the outside can be exhibited more stably in the bag.

Moreover, in the present invention, it is possible not only to prevent the odor of the contents of the bag from leaking out, but also to prevent the occurrence of an adverse effect of the odor from the outside of the bag on the contents of the bag. can also More specifically, for example, objects that have a large degree of adverse effects due to odor transfer, such as detergents, perfumes, and petroleum products such as gasoline and kerosene. can be effectively prevented from being adversely affected by external odors on the stored items.

In addition, the above components (especially each resin component) are relatively easy to recycle. Therefore, the laminated film and bag that are no longer needed can be suitably recycled, which is also preferable from the viewpoint of saving resources and saving energy.

In particular, the laminated film 1 shown in FIG. 1 has, in addition to the first layer 11 and the second layer 12, a third layer 13 mainly made of polyethylene and made of a material containing a deodorant. , and they have a structure in which they are laminated in this order.

When such a laminated film 1 is used as a bag, it is preferable that the surface on the side of the third layer 13 is the surface facing the stored items. In other words, when the laminated film 1 is used as a bag, it is preferable that the surface on the first layer 11 side is a layer (outermost layer) facing the outer surface.

The laminated film 1 shown in FIG. 1 will be mainly described below.
[1-1] First Layer The first layer 11 is a layer mainly made of polyethylene.

Thereby, for example, it can function as a protective layer that preferably protects the second layer 12 and the like, and the above-described effects can be exhibited more stably. In particular, the effects as described above can be obtained while ensuring the flexibility and the like of the laminated film 1 as a whole.

In the present specification, "mainly" is used to represent the component (main component) contained at the highest content rate in the target site, and in particular, the content of the main component in the target site The ratio is preferably 50% by mass or more, more preferably 55% by mass or more, and even more preferably 60% by mass or more.

[1-1-1] Polyethylene The polyethylene constituting the first layer 11 is low-density polyethylene, and its density is preferably 0.910 g/cm ³ or more and 0.930 g/cm ³ or less. It is more preferably 912 g/cm ^{3 or more and 0.930 g/cm 3 or less, and even more preferably 0.915 g/cm 3 or more} and 0.930 g/cm ³ or less.

As a result, the function as a protective layer and the appropriate flexibility of the laminated film 1 as a whole can be achieved at a higher level. Moreover, the adhesion between the first layer 11 and the second layer 12 can be made more excellent. In addition, when the first layer 11 contains a deodorant or fatty acid amide, which will be described later, it is possible to more effectively prevent these unwanted concentration unevenness in the first layer 11, and these functions can be exhibited more stably.

The weight average molecular weight of polyethylene constituting the first layer 11 is preferably 30,000 or more and 200,000 or less, more preferably 40,000 or more and 100,000 or less, and 50,000 or more and 70,000 or less. More preferred.

As a result, the function as a protective layer and the appropriate flexibility of the laminated film 1 as a whole can be achieved at a higher level. Moreover, the adhesion between the first layer 11 and the second layer 12 can be made more excellent. In addition, when the first layer 11 contains a deodorant or fatty acid amide, which will be described later, it is possible to more effectively prevent these unwanted concentration unevenness in the first layer 11, and these functions can be exhibited more stably.

The weight-average molecular weight can be determined by gel permeation chromatography.

The polyethylene contained in the first layer 11 may be, for example, recycled plastic derived from waste plastic or the like.
Using recycled plastic in this way is preferable from the viewpoint of resource saving.

The polyethylene content in the first layer 11 is preferably 65% by mass or more and 100% by mass or less, more preferably 68% by mass or more and 99.8% by mass or less, and more preferably 70% by mass or more and 99.8% by mass or less. It is more preferably 5% by mass or less.

As a result, the effects obtained by making the first layer 11 mainly made of polyethylene as described above can be exhibited more remarkably. In addition, if necessary, the components described later can be contained in the first layer in a more appropriate ratio, so that the effect of the components can be exhibited more effectively.

[1-1-2] Fatty acid amide The first layer 11 may be composed mainly of polyethylene, or may be composed substantially of only polyethylene. Furthermore, fatty acid amides may be included.

By containing the fatty acid amide, the slipperiness of the laminated film 1 can be improved, and the workability and the like during production of the bag body 10 using the laminated film 1 can be improved. .

Such an effect is obtained when at least one of the layers constituting the outer surface of the laminated film 1, that is, the first layer 11 and the third layer 13, which will be described later, contains a fatty acid amide. .

In addition, by containing the fatty acid amide together with the deodorant, which will be described in detail later, in the same layer, it is possible to more effectively prevent unwanted concentration unevenness of the deodorant in the layer.

Although the molecular weight of the fatty acid amide is not particularly limited, it is preferably 59 or more and 800 or less, more preferably 73 or more and 600 or less, and even more preferably 100 or more and 400 or less.
Thereby, the effect mentioned above is exhibited more notably.

Examples of fatty acid amides include acetamide, propionic acid amide, erucic acid amide, oleic acid amide, and ethylenebisoleic acid amide, and one or more selected from these may be used in combination. Preferably, said fatty acid amide is erucamide.
Thereby, the effect mentioned above is exhibited more notably.

When the first layer 11 contains a fatty acid amide, the content of the fatty acid amide in the first layer 11 is preferably 0.03% by mass or more and 3.0% by mass or less, and is preferably 0.06% by mass. More preferably, it is at least 2.7% by mass, and even more preferably at least 0.10% by mass and no more than 2.1% by mass.

As a result, the above-described effects obtained by including the fatty acid amide can be exhibited more significantly while the above-described first layer 11 being composed mainly of polyethylene can be sufficiently exhibited.

Further, when the laminated film 1 contains fatty acid amide, the content of the fatty acid amide in the laminated film 1 (the content of the fatty acid amide contained in the entire laminated film 1) is 0.01% by mass or more and 1.0% by mass. %, more preferably 0.02% by mass or more and 0.9% by mass or less, and even more preferably 0.03% by mass or more and 0.7% by mass or less.

As a result, the above-described effects obtained by including the fatty acid amide can be exhibited more significantly while the above-described first layer 11 being composed mainly of polyethylene can be sufficiently exhibited.

[1-1-3] Polyamide resin The first layer 11 may be composed mainly of polyethylene, but may further contain a polyamide resin.

By containing the polyamide resin, the straight cutting property when cutting the laminated film 1 becomes more excellent. Further, when the first layer 11 contains the above-described fatty acid amide together with the polyamide resin, it is possible to more effectively prevent undesired concentration unevenness of the fatty acid amide resin in the first layer 11. The effect of including the resin can be exhibited more effectively.

Examples of polyamide resins include hexamethylenediamine, decamethylenediamine, dodecamethylenediamine, 2,2,4-trimethylhexamethylenediamine, 2,4,4-trimethylhexamethylenediamine, 1,3-bis(aminomethyl) Aliphatic and alicyclic diamines such as cyclohexane, 1,4-bis(aminomethyl)cyclohexane, and bis(p-aminocyclohexylmethane), adipic acid, suberic acid, sebacic acid, cyclohexanedicarboxylic acid, and terephthalic acid , aliphatic polyamides obtained by polycondensation reaction with dicarboxylic acids such as isophthalic acid or derivatives thereof, ε-aminocaproic acid, polyamide resins obtained by condensation of 11-aminoundecanoic acid, ε-caprolactam, ω-laurolactam, etc. Polyamide resin obtained from the lactam compound of. Specific examples include nylon 6, nylon 6,6, nylon 9, nylon 11, nylon 12, nylon 6/66, nylon 66/610, nylon MXD6, and the like.

The polyamide resin contained in the first layer 11 may be, for example, recycled plastic derived from waste plastic or the like.
Using recycled plastic in this way is preferable from the viewpoint of resource saving.

The weight average molecular weight of the polyamide resin is preferably from 10,000 to 500,000, more preferably from 50,000 to 480,000, and even more preferably from 100,000 to 450,000.

When the first layer 11 contains a polyamide resin, the content of the polyamide resin in the first layer 11 is preferably 0.1% by mass or more and 40% by mass or less, and 0.2% by mass or more and 35% by mass. It is more preferably not more than 0.3% by mass and even more preferably 0.3% by mass or more and 30% by mass or less.

As a result, the above-described effect of including the polyamide resin can be exhibited more remarkably while sufficiently exhibiting the effect obtained by the first layer 11 being mainly composed of polyethylene.

[1-1-4] Other Components The first layer 11 may contain components other than those described above.

Examples of such components include resin materials other than polyethylene and polyamide resins, antiblocking agents, antibacterial agents, antifungal agents, antiviral agents, bactericides, antiseptic agents, antirust agents, pigments, coloring agents such as dyes, etc. , various fillers, dispersants, ultraviolet absorbers, antioxidants, pH adjusters, and the like. Above all, by containing a coloring agent, in the bag 10 manufactured using the laminated film 1, it is possible to effectively prevent the contents stored in the bag 10 from being seen from the outside.

Further, as will be described later, the laminated film 1 of the present embodiment contains a deodorant in the third layer 13, but the first layer 11 may contain a deodorant. The deodorant will be detailed later.

The content of components other than polyethylene, fatty acid amide, and polyamide resin in the first layer 11 is preferably 5.0% by mass or less, more preferably 3.0% by mass or less, and 2.0% by mass. % by mass or less is more preferable.

[1-1-5] Other conditions for the first layer The first layer 11 may have a substantially uniform composition as a whole, or may have portions with different compositions. There may be. For example, the first layer 11 may be composed of a gradient material whose composition changes in a gradient direction in its thickness direction, or may be a laminate having a plurality of layers. Also, different in-plane portions of the first layer 11 may have different compositions.

Although the thickness of the first layer 11 is not particularly limited, it is preferably 3.0 μm or more and 100 μm or less, more preferably 5.0 μm or more and 70 μm or less, and 7.0 μm or more and 50 μm or less. More preferred.

Thereby, both flexibility and durability of the laminated film 1 can be achieved at a higher level.

[1-2] Second Layer The second layer 12 is a layer mainly composed of a cyclic olefin resin and a material containing polyethylene.

As a result, for example, in the bag body 10 manufactured using the laminated film 1, the second layer 12 blocks the odor of the stored material, and the odor of the stored material permeates the second layer 12. can be effectively prevented.

In the present invention, at least one intermediate layer may be provided between the first layer and the second layer. are located adjacent to each other.

As a result, the layer structure of the laminated film 1 can be simplified, the production cost of the laminated film 1 can be suppressed, and the above-described effects of the present invention can be exhibited more remarkably. Moreover, the adhesion between the first layer 11 and the second layer 12 can be made more excellent.

[1-2-1] Cyclic olefin-based resin Cyclic olefin-based resin includes, as constituent monomers, a cyclic olefin which is a component having a cyclic structure in the molecule and a polymerizable carbon-carbon double bond, and an α-olefin. It is a copolymer containing

By including the cyclic olefin resin in the second layer 12, for example, in the bag body 10 manufactured using the laminated film 1, the second layer 12 blocks the odor of the stored items and reduces the odor of the stored items. can be effectively prevented from permeating the second layer 12 .

A cyclic olefin may be, for example, a monocyclic structure having only one ring structure in the molecule, or a polycyclic structure having two or more ring structures in the molecule. Examples of the polycyclic structure include bridged ring structures in which two rings have 3 or more shared atoms (a von Baeyer ring bridged to a single ring, a bridged condensed ring bridged to a condensed ring, etc.), and two rings having two shared atoms. , a spiro ring structure in which two rings have one shared atom, and a ring assembly structure in which two rings have no shared atoms and are connected via a bond. Cyclic olefins may have multiple types of polycyclic structures in the molecule.

The cyclic olefin may be a component having a cyclic structure and a polymerizable carbon-carbon double bond, and the polymerizable carbon-carbon double bond may be contained in a structure different from the cyclic structure. Good, but preferably contained in a cyclic structure.

As a result, for example, in the bag body 10 manufactured using the laminated film 1, the second layer 12 blocks the smell of the contents and prevents the smell of the contents from penetrating through the second layer 12. The effect of doing is exhibited more remarkably.

Specific examples of the ring structure include cycloalkane structures such as cyclopentane, cyclohexane and cyclopentane, cycloalkene structures such as cyclopentene, cyclohexene and cyclopentene, norbornene (bicyclo[2.2.1]hept-2-ene) and these Substitution structures of some elements (for example, hydrogen elements) of are mentioned.

The cyclic olefin-based resin preferably contains norbornene as a cyclic olefin that is a constituent monomer.

Thereby, the effect mentioned above can be exhibited more notably. Moreover, the production cost of the laminated film 1 can be suppressed more effectively.

The number of cyclic olefins constituting the cyclic olefin resin may be one, or two or more.

The α-olefin, which is a constituent monomer of the cyclic olefin resin, may have a cyclic structure in its molecule, but preferably has a chain structure without a cyclic structure.

Examples of α-olefins, which are constituent monomers of cyclic olefin-based resins, include ethylene, propylene, 1-butene, and 1-hexene.

Among them, the α-olefin is preferably ethylene. In other words, the cyclic olefin resin preferably contains cyclic olefin and ethylene as constituent monomers.

As a result, for example, in the bag body 10 manufactured using the laminated film 1, the second layer 12 blocks the smell of the contents and prevents the smell of the contents from penetrating through the second layer 12. The effect of doing is exhibited more remarkably.

The α-olefins constituting the cyclic olefin resin may be of one type or two or more types.

When the cyclic olefin content in the cyclic olefin resin is X _CO [mol%] and the ethylene content in the cyclic olefin resin is X _E [mol%], 0.01 ≤ X _CO /X _E ≤ It preferably satisfies the relationship of 100, more preferably satisfies the relationship 0.02≦X _CO /X _E ≦50.

As a result, for example, in the bag body 10 manufactured using the laminated film 1, the second layer 12 blocks the smell of the contents and prevents the smell of the contents from penetrating through the second layer 12. The effect of doing is exhibited more remarkably.

Cyclic olefin-based resins may contain cyclic olefins and α-olefins as constituent monomers, and may further contain other constituent monomers in addition to these. Examples of such constituent monomers (other constituent monomers) include β-olefins and γ-olefins having no carbon-carbon double convenience at the α-position.

However, the content of other constituent monomers in the cyclic olefin resin is preferably 20 mol % or less, more preferably 10 mol % or less, and even more preferably 5.0 mol % or less.

The cyclic olefin resin may contain two or more different polymers. Such polymers include, for example, polymers having different types of constituent monomers, polymers having different ratios of constituent monomers, and the like.

Although the weight average molecular weight of the cyclic olefin resin is not particularly limited, it is preferably 5,000 or more and 500,000 or less, and more preferably 7,000 or more and 300,000 or less.

As a result, for example, in the bag body 10 manufactured using the laminated film 1, the second layer 12 blocks the smell of the contents and prevents the smell of the contents from penetrating through the second layer 12. The effect of doing is exhibited more remarkably.

The content of the cyclic olefin resin in the second layer 12 is preferably 65% by mass or more and 95% by mass or less, more preferably 68% by mass or more and 93% by mass or less, and 70% by mass or more and 90% by mass. % by mass or less is more preferable.

As a result, for example, in the bag body 10 manufactured using the laminated film 1, the second layer 12 blocks the smell of the contents and prevents the smell of the contents from penetrating through the second layer 12. The effect of doing is exhibited more remarkably.

[1-2-2] Polyethylene The second layer 12 contains polyethylene together with a cyclic olefin resin as a main component.

Since the second layer 12 contains polyethylene together with the cyclic olefin resin, the second layer 12 can exhibit the above-described effect of blocking odors, and the flexibility of the second layer 12 can be improved. can be

The polyethylene constituting the second layer 12 is high-density polyethylene, and its density is preferably 0.942 g/cm ³ or more and 0.970 g/cm ³ or less, and more preferably 0.945 g/cm ³ or more and 0.967 g. /cm ³ or less, more preferably 0.948 g/cm ³ or more and 0.965 g/cm ³ or less.

As a result, both the effect of blocking the odor by the second layer 12 as described above and the appropriate flexibility of the second layer 12 can be achieved at a higher level.

The weight average molecular weight of polyethylene constituting the second layer 12 is preferably 10,000 or more and 1,000,000 or less, more preferably 100,000 or more and 800,000 or less, and 200,000 or more and 700,000 or less. More preferred.

As a result, both the effect of blocking the odor by the second layer 12 as described above and the appropriate flexibility of the second layer 12 can be achieved at a higher level. Further, the adhesion between the first layer 11 and the second layer 12 and the adhesion between the second layer 12 and the third layer 13 can be improved, and the durability of the laminated film 1 can be improved. can be made better.

The polyethylene contained in the second layer 12 may be, for example, recycled plastic derived from waste plastic or the like.
Using recycled plastic in this way is preferable from the viewpoint of resource saving.

The content of polyethylene in the second layer 12 is preferably 2.0% by mass or more and 35% by mass or less, more preferably 3.0% by mass or more and 32% by mass or less, and 4.0% by mass. % or more and 30 mass % or less is more preferable.

As a result, both the effect of blocking the odor by the second layer 12 as described above and the appropriate flexibility of the second layer 12 can be achieved at a higher level. Further, the adhesion between the first layer 11 and the second layer 12 and the adhesion between the second layer 12 and the third layer 13 can be improved, and the durability of the laminated film 1 can be improved. can be made better.

When the content of the cyclic olefin resin in the second layer 12 is X _2COC [mass%] and the content of polyethylene in the second layer 12 is X _2PE [mass%], 1.5 ≤ X _2COC /X _2PE ≤ 20, more preferably 2.0 ≤ X _2COC /X _2PE ≤ 15, more preferably 2.5 ≤ X _2COC /X _2PE ≤ 10 More preferred.

As a result, both the effect of blocking the odor by the second layer 12 as described above and the appropriate flexibility of the second layer 12 can be achieved at a higher level. Further, the adhesion between the first layer 11 and the second layer 12 and the adhesion between the second layer 12 and the third layer 13 can be improved, and the durability of the laminated film 1 can be improved. can be made better.

[1-2-3] Polyamide resin The second layer 12 may be composed mainly of a cyclic olefin resin and contain polyethylene, but may also contain a polyamide resin.

As the polyamide resin, those satisfying the conditions described above can be used. As a result, the same effect as described above can be obtained.

When the second layer 12 contains a polyamide resin, the content of the polyamide resin in the second layer 12 is preferably 0.1% by mass or more and 17% by mass or less, and 0.2% by mass or more and 15% by mass. It is more preferably not more than 0.3% by mass and even more preferably 0.3% by mass or more and 12% by mass or less.

As a result, the second layer 12 as described above is mainly composed of a cyclic olefin-based resin and is composed of a material containing polyethylene, while sufficiently exhibiting the effect obtained, while the above-described polyamide resin is included. The effect of can be exhibited more remarkably.

[1-2-4] Other Components The second layer 12 may contain components other than the components described above.

Such components include, for example, cyclic olefin-based resins, polyethylene, resin materials other than polyamide resins (for example, polymers containing cyclic olefins as constituent monomers but not α-olefins as constituent monomers, and α-olefins). Polymers containing as constituent monomers and not containing cyclic olefins as constituent monomers (excluding polyethylene), fatty acid amides, antiblocking agents, antibacterial agents, antifungal agents, antiviral agents, bactericides, antiseptics, antiseptics Examples include coloring agents such as rust agents, pigments and dyes, various fillers, dispersants, ultraviolet absorbers, antioxidants, and pH adjusters. Above all, by containing a coloring agent, in the bag 10 manufactured using the laminated film 1, it is possible to effectively prevent the contents stored in the bag 10 from being seen from the outside.

Further, as will be described later, the laminated film 1 of the present embodiment contains a deodorant in the third layer 13, but the second layer 12 may contain a deodorant. The deodorant will be detailed later.

However, the content of components other than the cyclic olefin resin, polyethylene, and polyamide resin in the second layer 12 is preferably 5.0% by mass or less, more preferably 3.0% by mass or less. , and 2.0% by mass or less.

[1-2-5] Other conditions for the second layer The second layer 12 may have a substantially uniform composition as a whole, or may have portions with different compositions. There may be. For example, the second layer 12 may be composed of a gradient material whose composition changes in a gradient direction in its thickness direction, or may be a laminate having a plurality of layers. Also, different in-plane portions of the second layer 12 may have different compositions.

Although the thickness of the second layer 12 is not particularly limited, it is preferably 3.0 μm or more and 100 μm or less, more preferably 5.0 μm or more and 70 μm or less, and 7.0 μm or more and 50 μm or less. More preferred.

As a result, both the flexibility of the laminated film 1 and the odor barrier effect can be achieved at a higher level.

[1-3] Third Layer The laminated film 1 shown in FIG. 1 is composed mainly of polyethylene and a material containing a deodorant in addition to the first layer 11 and the second layer 12. It further has a third layer 13 .

Thus, by having a layer containing a deodorant, odor components can be favorably captured, and the content itself of volatile odor components can be reduced. In particular, by having the third layer 13 mainly made of polyethylene and made of a material containing a deodorant, the undesired concentration unevenness of the deodorant in the third layer 13 can be more effectively reduced. can be prevented, the deodorant effect can be exhibited more stably, and the adhesion between the second layer 12 and the third layer 13 can be made more excellent, and the laminated film 1 Durability can be improved.

In particular, in the laminated film 1 shown in FIG. 1, the third layer 13 is provided on the side of the second layer 12 opposite to the side facing the first layer 11 .

As a result, when the laminated film 1 is used for manufacturing the bag 10, the first layer 11 is arranged on the outer surface side of the bag 10, and the second layer 12 is positioned inside (on the storage part 4 side). The third layer 13 can be arranged in the state. As a result, the function of the first layer 11 as described above can be exhibited, and the odor of stored items can be more effectively prevented from leaking to the outside.

At least one intermediate layer may be provided between the second layer and the third layer, but in the illustrated configuration, the second layer 12 and the third layer 13 are adjacent to each other. is provided.

As a result, the layer structure of the laminated film 1 can be simplified, the production cost of the laminated film 1 can be suppressed, and the above-described effects of the present invention can be exhibited more remarkably. Moreover, the adhesion between the second layer 12 and the third layer 13 can be made more excellent.

[1-3-1] Polyethylene Polyethylene constituting the third layer 13 is low-density polyethylene, and its density is preferably 0.910 g/cm ³ or more and 0.930 g/cm ³ or less. It is more preferably 912 g/cm ^{3 or more and 0.930 g/cm 3 or less, and even more preferably 0.915 g/cm 3 or more} and 0.930 g/cm ³ or less.

As a result, it is possible to more effectively prevent the undesired concentration unevenness of the deodorant in the third layer 13, and the flexibility of the laminated film 1 as a whole can be made more suitable. . Moreover, the adhesion between the second layer 12 and the third layer 13 can be improved, and the durability of the laminated film 1 can be improved. In addition, when the third layer 13 contains a fatty acid amide, which will be described later, it is possible to more effectively prevent unwanted concentration unevenness of the fatty acid amide in the third layer 13, and the function of the fatty acid amide can be further enhanced. It can be stably exhibited.

The weight average molecular weight of the polyethylene constituting the third layer 13 is preferably 30,000 or more and 200,000 or less, more preferably 40,000 or more and 100,000 or less, and 50,000 or more and 70,000 or less. More preferred.

As a result, it is possible to more effectively prevent the undesired concentration unevenness of the deodorant in the third layer 13, and the flexibility of the laminated film 1 as a whole can be made more suitable. . Moreover, the adhesion between the second layer 12 and the third layer 13 can be improved, and the durability of the laminated film 1 can be improved. In addition, when the third layer 13 contains a fatty acid amide, which will be described later, it is possible to more effectively prevent unwanted concentration unevenness of the fatty acid amide in the third layer 13, and the function of the fatty acid amide can be further enhanced. It can be stably exhibited.

The polyethylene contained in the third layer 13 may be, for example, recycled plastic derived from waste plastic or the like.
Using recycled plastic in this way is preferable from the viewpoint of resource saving.

The content of polyethylene in the third layer 13 is preferably 65.0% by mass or more and 99.8% by mass or less, more preferably 68.0% by mass or more and 99.5% by mass or less, More preferably, it is 70.0% by mass or more and 99.0% by mass or less.

As a result, the above-described effect of the third layer 13 containing polyethylene and the effect of containing the deodorant can be achieved at a higher level. Further, the adhesion between the second layer 12 and the third layer 13 and the adhesion between the second layer 12 and the third layer 13 can be improved, and the durability of the laminated film 1 can be improved. can be made better.

[1-3-2] Deodorant The laminated film of the invention contains a deodorant.

The part containing the deodorant is not particularly limited, but the deodorant is contained in the third layer 13 in the laminated film 1 of the present embodiment.

The deodorant may be contained in the laminated film 1, for example, in a dispersed state or in a dissolved state.

Examples of deodorants include adsorbents such as zeolite, silica, and activated carbon, metal oxides (titanium dioxide, manganese dioxide, zinc oxide, etc.), organic nitrogen-based, organic acid-based, alkaline-based, metal chelate compounds, tea and Plant extracts such as mushrooms, cyclodextrins and the like can be mentioned, and one or more selected from these can be used in combination.

Commercially available deodorants include, for example, the Surf Sorb series (manufactured by Aichi Silica Kogyo Co., Ltd.), PEX CLT-71AL, PEX CLT-72AL, and PEX CLT-73AL (manufactured by Tokyo Ink Co., Ltd.). , Shouklens series (manufactured by Rasa Kogyo Co., Ltd.), Pansil series (manufactured by Lilee Science Industry Co., Ltd.), and the like, and one or more selected from these can be used in combination.

Also, the deodorant may be included, for example, in a capsule-encapsulated state.
The content of the deodorant in the layer containing the deodorant (the third layer 13 in this embodiment) is preferably 0.1% by mass or more and 5.0% by mass or less, and is preferably 0.3% by mass or more. It is more preferably 0.7 mass % or more and 4.0 mass % or less, more preferably 0.7 mass % or more and 4.0 mass % or less.

As a result, the effect of including the deodorant in the third layer 13 as described above can be sufficiently exhibited, and the effect of including the deodorant can be exhibited more remarkably.

In addition, the content of the deodorant in the laminated film 1 (the content of the deodorant contained in the entire laminated film 1. In the present embodiment, when the deodorant is contained in a layer other than the third layer 13, The content of the deodorant contained in the entire laminated film 1) is preferably 0.03% by mass or more and 1.7% by mass or less, and is 0.1% by mass or more and 1.5% by mass or less. is more preferable, and more preferably 0.2% by mass or more and 1.3% by mass or less.

As a result, for example, in the bag body 10 manufactured using the laminated film 1, it is possible to more effectively prevent the odor of the stored items from leaking to the outside, and the above-described components other than the deodorant function can be exhibited more effectively.

[1-3-3] Fatty Acid Amide In the present embodiment, the third layer 13 is mainly made of polyethylene and made of a material containing a deodorant. It may contain an amide.
By containing a fatty acid amide, the above effects can be obtained.

When the third layer 13 contains fatty acid amide, the content of fatty acid amide in the third layer 13 is preferably 0.03% by mass or more and 3.0% by mass or less, and preferably 0.06% by mass. More preferably, it is at least 2.7% by mass, and even more preferably at least 0.10% by mass and no more than 2.1% by mass.

As a result, the above-described fatty acid amide can be sufficiently exhibited while the third layer 13 as described above is mainly composed of polyethylene and is composed of a material containing a deodorant. The effect by including can be exhibited more notably.

[1-3-4] Polyamide resin In the present embodiment, the third layer 13 is mainly made of polyethylene and made of a material containing a deodorant. You can

By containing the polyamide resin, the straight cutting property when cutting the laminated film 1 becomes more excellent. Further, when the third layer 13 contains the above-described fatty acid amide together with the polyamide resin, it is possible to more effectively prevent undesired concentration unevenness of the fatty acid amide resin in the third layer 13. The effect of including the resin can be exhibited more effectively.

As the polyamide resin, those satisfying the conditions described above can be used. As a result, the same effect as described above can be obtained.

When the third layer 13 contains a polyamide resin, the content of the polyamide resin in the third layer 13 is preferably 0.1% by mass or more and 32% by mass or less, and 0.2% by mass or more and 30% by mass. It is more preferably not more than 0.3% by mass and even more preferably 0.3% by mass or more and 27% by mass or less.

As a result, the above-described polyamide resin is used while sufficiently exhibiting the effect obtained by the fact that the third layer 13 as described above is mainly composed of polyethylene and is composed of a material containing a deodorant. The effect by including can be exhibited more notably.

[1-3-5] Other Components The third layer 13 may contain components other than those described above.

Examples of such components include resin materials other than polyethylene and polyamide resins, antiblocking agents, antibacterial agents, antifungal agents, antiviral agents, bactericides, antiseptic agents, antirust agents, pigments, coloring agents such as dyes, etc. , various fillers, dispersants, ultraviolet absorbers, antioxidants, pH adjusters, and the like. Above all, by containing a coloring agent, in the bag 10 manufactured using the laminated film 1, it is possible to effectively prevent the contents stored in the bag 10 from being seen from the outside.

The content of components other than polyethylene, deodorant, fatty acid amide, and polyamide resin in the third layer 13 is preferably 5.0% by mass or less, more preferably 3.0% by mass or less. , and 2.0% by mass or less.

[1-3-6] Other conditions for the third layer The third layer 13 may have a substantially uniform composition as a whole, or may have portions with different compositions. There may be. For example, the third layer 13 may be composed of a gradient material whose composition changes in a gradient direction in its thickness direction, or may be a laminate having a plurality of layers. Also, different in-plane portions of the third layer 13 may have different compositions.

Although the thickness of the third layer 13 is not particularly limited, it is preferably 3.0 μm or more and 100 μm or less, more preferably 5.0 μm or more and 70 μm or less, and 7.0 μm or more and 50 μm or less. More preferred.

As a result, both the flexibility of the laminated film 1 and the odor trapping effect can be achieved at a higher level.

[1-4] Other Conditions for the Laminated Film as a Whole In FIG. good too.

Although the thickness of the laminated film 1 is not particularly limited, it is preferably 10 μm or more and 300 μm or less, more preferably 15 μm or more and 210 μm or less, and even more preferably 21 μm or more and 150 μm or less.

As a result, while the flexibility of the laminated film 1 is sufficiently excellent, for example, when the laminated film 1 is used for manufacturing the bag 10, the smell of the contents of the bag 10 is prevented from leaking to the outside. can be effectively prevented.

[1-5] Method for producing laminated film The laminated film of the present invention may be produced by any method, but can be produced using, for example, a co-extrusion inflation method.

In the co-extrusion inflation method, compositions corresponding to each layer constituting the laminated film of the present invention are heated and melted in separate extruders, and laminated in a molten state by a method such as a co-extrusion multilayer die method or a feed block method. After that, it is molded into a film by an inflation method. With such a method, it is possible to relatively freely adjust the thickness ratio of each layer, which is excellent in hygiene and cost-effectiveness.
A laminated film obtained by such a method is usually cylindrical.

In the tubular laminated film, the layer containing the deodorant (the layer with the highest deodorant content when multiple layers contain the deodorant) is positioned inside the second layer. is preferably arranged.

As a result, it is possible to effectively prevent the deodorant from unintentionally volatilizing or deactivating during the production or storage of the laminated film. Moreover, when the laminated film has the laminated structure shown in FIG. , the third layer 13 can be placed inside the second layer 12 (on the storage portion 4 side).
In addition, the laminated film obtained by the above method may be cut open for use.

[1-6] Method for storing laminated film The method for storing the laminated film of the present invention is not particularly limited, but a layer containing a deodorant (when multiple layers contain a deodorant, a deodorant is contained The layer with the highest modulus) is preferably stored in a form that is not exposed to the outside. More specifically, for example, in a tubular laminated film, a layer containing a deodorant (when a plurality of layers contain a deodorant, the layer having the highest deodorant content) is a layer other than the outermost layer. In the case of a layer, the cylindrical laminated film is pressed in the thickness direction and stored in a state where the innermost layers are in close contact with each other, or when the laminated film is long, the laminated film is wound (For example, the layer containing the deodorant (when multiple layers contain the deodorant, the layer with the highest deodorant content) faces inward) and stored. preferably.

As a result, it is possible to suitably prevent the deodorant from unintentionally volatilizing, deactivating, and the like. In particular, even when the laminated film is stored for a long period of time or stored in a severe environment such as a high temperature environment, the above effects can be obtained.

[1-7] Uses of Laminated Film The laminated film of the present invention can be suitably used for manufacturing a bag described later. Moreover, the laminated film of the present invention may be used as a packaging sheet without forming a seal portion by cutting into a desired size and shape, if necessary.

[2] Bag Next, the bag according to the present invention will be described.

FIG. 2 is a perspective view schematically showing an example of the bag of the present invention. FIG. 3 is a perspective view schematically showing another example of the bag of the present invention.

The bag of the present invention is characterized by being manufactured using the above-described laminated film of the present invention.

As a result, for example, it is possible to provide a bag that can effectively prevent the smell of stored items from escaping to the outside. In particular, the above-described excellent effects can be exhibited for various odors such as excrement odor, sweat odor, aging odor, and mold odor. In addition, even when it comes into contact with an alkaline substance such as ammonia, an acidic substance such as acetic acid, or the like, the above effects can be stably exhibited.

Moreover, in the present invention, it is possible not only to prevent the odor of the contents of the bag from leaking out, but also to prevent the occurrence of an adverse effect of the odor from the outside of the bag on the contents of the bag. can also More specifically, for example, objects that have a large degree of adverse effects due to odor transfer, such as detergents, perfumes, and petroleum products such as gasoline and kerosene. can be effectively prevented from being adversely affected by external odors on the stored items.

In particular, the bag body 10 shown in FIG. 2 is a rectangular flat bag, and has an opening 3 as an opening for inserting a stored item into a storage section 4, which is a space for storing the stored item. A seal portion 2 is provided on the opposite side.

As a result, in the normal use state, the solid or liquid storage items stored in the storage section 4 are preferably prevented from leaking out unintentionally.

In addition, the bag 10 itself may be tied so that the opening 3 is closed in a state in which the stored items are stored in the storage portion 4, or the portion of the bag 10 near the opening 3 may be fused or glued, By sealing with a member such as a string, rubber, tape, clip, etc. in a folded state or a collected state, the liquid-tight and airtight state of the storage portion 4 can be secured. It is possible to suitably prevent leakage of odors from stored items. In addition, even if the bag body 10 in which the stored items are stored falls over in the above-described state, it is possible to effectively prevent leakage of the stored items stored in the storage section 4, leakage of the smell of the stored items, and the like. can be prevented. In particular, the excellent effects as described above can be exhibited over a long period of time.

Such a bag 10 can be suitably manufactured by, for example, sealing one opening of the tubular laminated film 1 .

At this time, it is preferable that the laminated film 1 is in such a state that the third layer 13 (the layer containing the deodorant) faces the inner side of the bag body 10 (accommodating section 4).

The laminated film may be produced by, for example, preparing two rectangular sheets and sealing the three sides of the rectangular sheet in a state where they are superimposed.

3, similarly to the bag body 10 shown in FIG. 2, the bag body 10 has an opening 3, which is an opening for inserting the stored material into the storage part 4, which is a space for storing the stored material. A seal portion 2 is provided on the side opposite to the portion 3, and a handbag portion 5 and a binding portion 6 are provided.

By having the handle portion 5, for example, the bag body 10 can be suitably held or hung on an arm (forearm portion, etc.). The bag 10 can be conveniently lifted and transported. The handbag 5 is not limited to being used in the form described above. For example, the handbag 5 may be used by being hung on a hook or by inserting a long object such as a stick.

In the configuration shown in FIG. 3 , the handbag 5 is formed by sealing opposing portions of the laminated film 1 with the sealing portion 51 and cutting out a part of the laminated film 1 with the notches 52 and 53 . .

By having the tying part 6, for example, by tying the tying part 6 in a state in which the storage item is stored in the storage part 4, the stored material can be suitably prevented from being detached from the bag body 10, and the storage part 4 can be secured. The bag body 10 in which the contents are accommodated can be suitably transported.

In addition, by having the tying part 6, the bag body 10 in a state in which the stored items are stored in the storage part 4 can be suitably conveyed by tying the bag body 10 with a knot that can be easily untied as needed, such as a bow knot. and then the stored items can be easily taken out from the bag body 10.例文帳に追加Therefore, the bag body 10 can be suitably applied to a mode such as a shopping bag (including a shopping bag), in which a stored item is temporarily stored and transported, and then the stored item is taken out. can. Moreover, in such a form, the bag 10 can be suitably used repeatedly. Further, after being used in the form as described above, the bag body 10 can be used as a dirt bag, a waste bag (garbage bag or the like), or the like.

For example, when the bag body 10 is used as a waste bag, a waste bag (garbage bag, etc.), the handle part 5 may be tied up in the same manner as the binding part 6 described above. good.

Although the configuration shown in FIG. 3 has two handbags 5 and two binding parts 6, the number of handbags 5 and binding parts 6 is not particularly limited.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these.

Further, in the above-described embodiment, the laminated film has a first layer mainly made of polyethylene, a second layer mainly made of a cyclic olefin resin and made of a material containing polyethylene, and a and a third layer made of a material containing a deodorant are mainly described in the case of a three-layer structure laminated in this order, but the laminated film of the present invention is , a first layer mainly composed of polyethylene and a second layer mainly composed of a cyclic olefin resin and a material containing polyethylene, and a deodorant is applied to at least a part of the laminated film. It is not limited to the layer structure shown in FIG. 1 as long as it is contained, and in the laminated film of the present invention, the number of constituting layers, the order of arrangement, etc. may be arbitrary.

More specifically, for example, in the above-described embodiment, when the third layer is provided on the surface of the second layer opposite to the surface facing the first layer, that is, when the first layer, the second layer, and the third layer are laminated in this order, but the third layer is different from the surface of the first layer facing the second layer. It may be provided on the opposite surface side, or may be provided between the first layer and the second layer.

In addition, in the above-described embodiments, the case where the deodorant is contained in the third layer has been mainly described, but in the laminated film of the present invention, the deodorant may be contained in any part, When the deodorant is contained in a part other than the third layer, the third layer may not contain the deodorant.

Moreover, the structure shown in FIG. 1 may further have an intermediate layer and a coating layer (not shown).

Further, the laminated film 1 of the present invention, for example, as shown in FIG. A layer 15 mainly composed of a modified polyethylene having adhesiveness (adhesive polyethylene), a layer 16 mainly composed of a cyclic olefin resin and composed of a material containing polyethylene, and a modified polyethylene mainly having adhesiveness ( A layer 17 made of adhesive polyethylene) and a layer 18 made mainly of polyethylene are laminated in this order, and may contain a deodorant. In such a laminated film 1, it is preferable that at least one of the layers 17 and 18 contains the deodorant. When such a laminated film 1 is used as a bag, it is preferable that the surface on the layer 18 side is the surface facing the contents.

In addition, the bag of the present invention may be manufactured using the laminated film of the present invention and provided with a storage portion for storing a stored item, in addition to the portion formed using the laminated film of the present invention. It may further have a portion formed using a member, composition, etc. other than the laminated film of the present invention.

Moreover, the bag of the present invention may have a gusseted shape called a gusset bag, for example.

EXAMPLES The present invention will be described in detail below based on Examples and Comparative Examples, but the present invention is not limited thereto.

[3] Production of laminated film (Example 1)
A water-cooled co-extrusion blow-molding machine consisting of three extruders and one circular three-layer die was used to supply the corresponding compositions for the first layer, the second layer and the third layer. Thus, a cylindrical (tubular) laminated film having a perimeter of 50 cm was produced by laminating the first layer, the second layer and the third layer in this order.

(Examples 2-6)
By adjusting the composition of the composition used for forming each layer and the extrusion speed, the conditions of each layer were adjusted to those shown in Table 1. In the same manner as in Example 1, a cylindrical (tubular) was produced.

(Comparative example 1)
A cylindrical (tube) shape) laminated film was produced.

(Comparative example 2)
A cylindrical (tubular) laminated film was produced in the same manner as in Example 1, except that the third layer was formed as a layer containing no deodorant.

(Comparative Example 3)
Example 1 except that the second layer was formed as a layer made of high-density polyethylene and did not contain a cyclic olefin-based resin, and the third layer was formed as a layer that did not contain a deodorant. A cylindrical (tubular) laminated film was produced in the same manner.

Table 1 summarizes the conditions of the cylindrical (tube-shaped) films according to the above Examples and Comparative Examples. In Table 1, "LDPE1" is low-density polyethylene (Novatec LL, manufactured by Japan Polyethylene Co., Ltd.) with a density of 0.930 g/cm ³ , and high-density polyethylene (Novatec LL, manufactured by Japan Polyethylene Co., Ltd.) is 0.959 g/cm ³ Novatec HD) as "HDPE1", cyclic olefin resin containing norbornene, which is a cyclic olefin as a constituent monomer, and ethylene (TOPAS8007 series manufactured by Polyplastics Co., Ltd.) as "COC1", and deodorant Surfsorb Ac (Aichi) "D1" for Surfsorb Ba (manufactured by Aichi Soda Kogyo Co., Ltd.) as a deodorant, "D2" for Surfsorb Ba (manufactured by Aichi Soda Kogyo Co., Ltd.) as a deodorant, and "D3" for Surfsorb Me (manufactured by Aichi Soda Kogyo Co., Ltd.) as a deodorant. , Sukulenz (manufactured by Rasa Kogyo Co., Ltd.) as a deodorant is indicated as "D4", and erucic acid amide as a fatty acid amide is indicated as "FAA1".

[4] Manufacture of the bag The cylindrical (tubular) film according to each of the examples and comparative examples is cut to a predetermined length, and one opening is heat-sealed to form a sealed portion. Thus, a bag as shown in FIG. 2 was obtained.

[5] Evaluation [5-1] Sensory test Put acetic acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., special reagent grade): 1 mL into the storage part of the bag according to each of the above examples and comparative examples, and put the bag itself. The part near the opening (the part 20 cm wide from the opening) was tightly tied.

In this state, each of the above bags is individually placed in a commercially available polyethylene terephthalate bag (aluminum bag) provided with an aluminum deposition film, the opening is sealed with a clip, and after 96 hours When the clip was removed and the inside of the aluminum bag was sniffed, the odor of acetic acid was not sensed in each of the above examples, whereas the odor of acetic acid was sensed in each of the comparative examples.

Moreover, the same evaluation as above was performed except that methyl mercaptan and ammonia were used instead of acetic acid, and the same results as above were confirmed.

Moreover, the laminated film of the present invention had suitable flexibility. In addition, the laminated film of the present invention containing fatty acid amide had suitable slipperiness.

[5-2] Quantitative evaluation Put 1 mL of acetic acid (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., special reagent grade) in the storage part of the bag according to each of the above examples and comparative examples, and near the opening of the bag itself. was sealed by heat sealing.

In this state, each of the above bags was individually placed in a commercially available vinyl fluoride resin bag with a cock (commercially available bag), the cock was closed, and the bag was allowed to stand in an environment of 30°C.

After 5 hours, the cock was opened, the gas in the commercial bag was sampled, and analysis was performed using a Kitagawa gas detector tube (manufactured by Komyo Rika Co., Ltd., 216S acetic acid). The acetic acid concentration at which the

0.2 mL of Wako first grade 0.25% ammonia water (manufactured by FUJIFILM Wako Pure Chemical Industries, Ltd.) was placed in the storage portion of the bag according to each of the above Examples and Comparative Examples, and the portion near the opening of the bag itself was placed. was sealed by heat sealing.

In this state, each of the above bags was individually placed in a commercially available vinyl fluoride resin bag with a cock (commercially available bag), the cock was closed, and the bag was allowed to stand in an environment of 30°C.

After 5 hours, the cock is opened, the gas in the commercial bag is sampled, and the gas is analyzed using a Kitagawa gas detector tube (105SC, manufactured by Komyo Rika Co., Ltd.). Ammonia concentration was determined.
Table 2 summarizes the results of the above quantitative evaluation.

As is clear from Table 2, the present invention gave excellent results, while the comparative examples did not give satisfactory results.

In addition, recycled plastic is used, and the density of polyethylene constituting the first layer is variously changed in the range of 0.910 g/cm ³ or more and 0.930 g/cm ³ or less, and the weight of polyethylene constituting the first layer The average molecular weight is variously changed in the range of 30,000 or more and 200,000 or less, the content of polyethylene in the first layer is variously changed in the range of 65% by mass or more and 100% by mass or less, and the fatty acid amide in the first layer is varied in the range of 0.03% by mass to 3.0% by mass, and the content of fatty acid amide in the laminated film is varied in the range of 0.01% by mass to 1.0% by mass. Then, the weight average molecular weight of the polyamide resin constituting the first layer is variously changed in the range of 10,000 or more and 500,000 or less, and the content of the polyamide resin in the first layer is 0.1% by mass or more and 40% by mass. Various changes are made within the following ranges, the thickness of the first layer is variously changed within the range of 3.0 μm or more and 100 μm or less, and the cyclic olefin content in the cyclic olefin resin constituting the second layer is X _CO [ mol %] and the ethylene content X _E [mol %] in the cyclic olefin resin constituting the second layer (X _CO /X _E ) is varied in the range of 0.01 to 100. , the weight average molecular weight of the cyclic olefin resin constituting the second layer is variously changed in the range of 5000 or more and 500,000 or less, and the content of the cyclic olefin resin in the second layer is 65% by mass or more and 95% by mass. Various changes are made within the following ranges, the density of the polyethylene constituting the second layer is variously changed within the range of 0.942 g/cm ³ or more and 0.970 g/cm ³ or less, and the weight of the polyethylene constituting the second layer The average molecular weight is variously changed in the range of 10,000 to 1,000,000, the content of polyethylene in the second layer is variously changed in the range of 2.0% by mass to 35% by mass, and the second layer The ratio (X _2COC /X _2PE ) between the cyclic olefin resin content X _2COC [mass%] and the polyethylene content X _2PE [mass%] in the second layer is in the range of 1.5 to 20 Various changes are made, the weight average molecular weight of the polyamide resin constituting the second layer is variously changed in the range of 10,000 or more and 500,000 or less, and the content of the polyamide resin in the second layer is 0.1% by mass or more 17 Various changes are made in the range of mass % or less, the thickness of the second layer is variously changed in the range of 3.0 μm or more and 100 μm or less, and the density of polyethylene constituting the third layer is 0.91 Various changes are made in the range of 0 g/cm ³ or more and 0.930 g/cm ³ or less, and the weight average molecular weight of polyethylene constituting the third layer is changed variously in the range of 30,000 or more and 200,000 or less. The content of polyethylene in the third layer is varied in the range of 65.0% by mass to 99.8% by mass, and the content of the deodorant in the third layer is 0.1% by mass to 5.0% by mass. , the deodorant content in the laminated film is varied in the range of 0.03% by mass or more and 1.7% by mass or less, and the fatty acid amide content in the third layer is changed to 0 Various changes in the range of .03% by mass or more and 3.0% by mass or less, various changes in the weight average molecular weight of the polyamide resin constituting the third layer in the range of 10,000 to 500,000, In the third layer Except for changing the content of the polyamide resin in the range of 0.1% by mass or more and 32% by mass or less and changing the thickness of the third layer in the range of 3.0 µm or more and 100 µm or less, each of the above implementations A laminated film and a bag body were produced in the same manner as in the examples, and the same evaluation as above was conducted, and the same results as above were confirmed.

DESCRIPTION OF SYMBOLS 10... Bag 1... Laminated film 11... First layer 12... Second layer 13... Third layer 14... Layer 15... Layer 16... Layer 17... Layer 18... Layer 2... Seal part 3... Opening part 4 ... Storage part 5... Handbag part 51... Seal part 52... Notch part 53... Notch part 6... Tie part

Claims (10)

a first layer composed primarily of polyethylene;
A second layer mainly composed of a cyclic olefin resin and composed of a material containing polyethylene,
A laminated film comprising a polyamide resin and a deodorant. 2. The laminate of claim 1, further comprising, in addition to said first layer and said second layer, a third layer composed primarily of polyethylene and composed of a material containing said deodorant. the film. 3. The laminated film according to claim 2, wherein said third layer contains said polyamide resin. 4. The laminated film according to claim 3, wherein the content of said polyamide resin in said third layer is 0.1% by mass or more and 32% by mass or less. 5. The laminated film according to any one of claims 1 to 4, wherein the first layer contains the polyamide resin. 6. The laminated film according to claim 5, wherein the content of said polyamide resin in said first layer is 0.1% by mass or more and 40% by mass or less. 7. The laminated film according to any one of claims 1 to 6, wherein said second layer contains said polyamide resin. The laminated film according to claim 7, wherein the content of the polyamide resin in the second layer is 0.1% by mass or more and 17% by mass or less. The laminated film according to any one of claims 1 to 8, wherein the polyamide resin is a recycled plastic. A bag using the laminated film according to any one of claims 1 to 9.

Images