JP2006281651A - Composite film - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fecal smell intercepting film which has a property for barring the smell (fecal smell) which excrements, particularly feces emit and which excels in softness, pinhole resistance and the like. <P>SOLUTION: The fecal smell intercepting film comprises an amorphous polyamide layer (A) containing ≥70 wt.% of an amorphous polyamide, a polyolefin layer (B) and/or an adhesive resin layer (C). In the tubular film for simple toilets according to the invention the above (B) or (C) layer exists on the outside of the layer (A). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention comprises at least a feces odor blocking performance for blocking excreta, particularly stool-generated odor (hereinafter referred to as “stool odor”), which comprises at least an amorphous polyamide-containing layer and a polyolefin layer. The present invention relates to a multilayer film for treatment and disposal (hereinafter referred to as “stool odor blocking film”) and its use.

  Plastic films are used for packaging filth for the purpose of receiving, collecting, and discarding stool such as stool excreted from the human body or animals. For example, in simple toilets such as outdoor temporary toilets used at construction sites and sightseeing spots, and portable toilets used indoors for nursing care, waste such as excreted stool is received during excretion for easy disposal. A tube-shaped plastic film (hereinafter referred to as a “tubular film for a simple toilet”) is used for the purpose. Plastic film bags (hereinafter referred to as “diaper collection bags”) are also used in diaper collection bags for collecting and discarding diapers used by infants, elderly people, sick people, and the like. Furthermore, plastic film bags (hereinafter referred to as “pet excrement disposal bags”) are also used as disposal bags and disposal bags for pets such as dogs and cats. Conventionally, a polyethylene film has been frequently used as a plastic film material for bags used for the purpose of treating these wastes.

  However, since polyethylene film has poor barrier properties against stool odors, excrement disposal and disposal bags using polyethylene film have a stool odor and discomfort to users and the surrounding people. There has been a need for excrement disposal and waste film (stool odor blocking film) having odor blocking performance.

  In order to impart odor blocking properties to plastic films, multilayer films containing ethylene-vinyl alcohol copolymer, polyvinylidene chloride, etc., which are considered to be excellent in odor blocking performance, have been conventionally considered to be suitable. I came. Among these resins, polyvinylidene chloride has the best odor-blocking performance, but used bags that have been treated and disposed of are often incinerated, and a multilayer made of vinylidene chloride resin. The film may cause dioxins during incineration, which is not preferable from the viewpoint of environmental impact. On the other hand, the ethylene-vinyl alcohol copolymer is a non-chlorine resin and is suitable in terms of environmental impact. However, the odor blocking property of the resin is greatly different depending on the target odor, and the multilayer film made of the ethylene-vinyl alcohol copolymer is significantly inferior in the fecal odor blocking performance compared to the multilayer film made of the vinylidene chloride resin. Yes.

  In recent years, a multilayer film containing amorphous nylon has been developed by paying attention to various characteristics of amorphous nylon. However, in these multilayer films, amorphous nylon is used mainly for improving moldability, labeling properties, curling prevention, etc., and odor blocking performance, particularly fecal odor blocking performance, has not reached a sufficient level.

  For example, Patent Document 1 includes a layer made of nylon 6 and a polyamide resin in which 20 to 40 parts by weight of nylon 6T / 6I (amorphous polyamide) is added to 100 parts by weight of nylon 6/66 (crystalline nylon). The composite film which laminated | stacked the layer which consists of and the layer which consists of polyolefin in this order is described. However, since this composite film has a low barrier against stool odor, it has been difficult to use as a stool odor barrier film.

Patent Documents 2 and 3 include a layer composed of amorphous nylon and linear aliphatic nylon, a layer composed of a single substance or a mixture of amorphous nylon or linear aliphatic nylon, and a gas barrier layer. A multilayer film is described, and an ethylene-vinyl alcohol copolymer, polyvinylidene chloride, or the like is used for the gas barrier layer. However, according to the examples of these publications, the amount of amorphous nylon contained in the layer containing amorphous nylon is small, and therefore, these multilayer films have low barrier properties against stool odor, It was difficult to use as a stool odor blocking film.

Patent Document 4 describes a multilayer film having a layer made of polyamide resin and a layer made of polyolefin. Although it is described that the layer made of this polyamide resin may contain an amorphous polyamide resin, the amount is about 20% by weight and, like the above multilayer film, has a low barrier against stool odor, It was difficult to use as a stool odor blocking film.
JP-A-5-16306 JP-A-8-1885 JP-A-8-300583 JP 2003-175543 A

  The present invention is intended to solve the problems associated with the prior art as described above, and has a fecal odor blocking performance that blocks excretions, particularly odors generated by stool (stool odor), and is flexible and resistant. The object is to provide a fecal odor barrier film having excellent pinhole properties. Another object of the present invention is to provide a simple toilet tubular film, a diaper collection bag and a pet excrement disposal bag made of the stool odor blocking film.

  As a result of intensive studies to solve the above problems, the present inventors have found that a multilayer film containing an amorphous polyamide layer (A) and a polyolefin layer (B) containing at least 70% by weight of amorphous polyamide is convenient. It has been found that it has excellent odor blocking properties, flexibility and pinhole resistance, and has completed the invention.

The stool-odor-blocking film according to the present invention comprises an amorphous polyamide layer (A) containing 70% by weight or more of an amorphous polyamide, a polyolefin layer (B), and / or an adhesive resin layer (C). Accordingly, the aliphatic polyamide layer (D) is preferably included, and the following layer structure is preferable. These stool odor blocking films are preferably films produced by a coextrusion method.
(I) Polyolefin layer (B) / Amorphous polyamide layer (A) / Polyolefin layer (B) (see FIG. 1)
(Ii) Amorphous polyamide layer (A) / adhesive resin layer (C) / polyolefin layer (B) (see FIG. 2)
(Iii) Polyolefin layer (B) / Adhesive resin layer (C) / Amorphous polyamide layer (A) / Adhesive resin layer (C) / Polyolefin layer (B) (see FIG. 3)
(Iv) Aliphatic polyamide layer (D) / adhesive resin layer (C) / amorphous polyamide layer (A) / adhesive resin layer (C) / polyolefin layer (B) (see FIG. 4)
(V) Amorphous polyamide layer (A) / adhesive resin layer (C) (see FIG. 5)
(Vi) Adhesive resin layer (C) / Amorphous polyamide layer (A) / Adhesive resin layer (C) (see FIG. 6)
1-6 is an example of the stool odor blocking film according to the present invention, and a film with the upper and lower surfaces reversed is also included in the stool odor blocking film according to the present invention.

  The tubular film for simple toilets and the bag for blocking stool odor according to the present invention comprise these stool odor blocking films.

  The stool odor blocking film according to the present invention is excellent in blocking stool odor and can be used in various filth disposal bags such as a simple toilet bag, a diaper collection bag after use, and a pet excrement disposal bag. Moreover, it can be used as an outer bag having a bag as an object to be encapsulated. As a result, the discomfort of surrounding people can be reduced.

Below, each said layer (A)-(D) is demonstrated in detail.
(A) Amorphous polyamide layer:
The amorphous polyamide layer (A) has an amount of amorphous polyamide of 70% by weight or more, preferably 80% by weight or more, more preferably 90% by weight or more and 100% by weight or less from the viewpoint of stool odor blocking performance. In particular, it is preferable to comprise only amorphous polyamide. However, in order to maintain the stool odor blocking performance and impart flexibility to the amorphous polyamide layer (A), the aliphatic polyamide is more than 1% by weight and less than 30% by weight, preferably more than 3% by weight. It may be contained in an amount of less than 20% by weight, more preferably more than 5% by weight and less than 10% by weight. In this case, the amorphous polyamide is 70% by weight or more and 99% by weight or less, preferably 80% by weight or more. It is desirable to contain it in an amount of 97% by weight or less, more preferably 90 to 95% by weight. When the amount of the amorphous polyamide is less than the above lower limit, the barrier property against stool odor is drastically lowered, and the suitability for practical use as a stool odor barrier film is significantly impaired.

  The amorphous polyamide is not particularly limited as long as it is a polyamide that does not substantially exhibit crystallinity, and specifically, a semi-aromatic obtained by polycondensation of an aromatic dicarboxylic acid and an aliphatic or alicyclic diamine. Polyamide: Polyamides obtained by copolymerizing aromatic dicarboxylic acid, aliphatic or alicyclic dicarboxylic acid, and aliphatic or alicyclic diamine; Copolymerizing aromatic dicarboxylic acid, aliphatic or alicyclic diamine, and cyclic amide monomer Polymerized polyamides and the like can be mentioned.

  Examples of the aromatic dicarboxylic acid include terephthalic acid and isophthalic acid. Examples of the aliphatic diamine include 1,6-hexamethylenediamine and trimethyl-1,6-hexamethylenediamine. Examples of the alicyclic diamine include 4,4′-diamino-dicyclohexylenemethane, 4,4′-diamino-3,3′-dimethyl-dicyclohexylenemethane, 4,4′-diamino-dicyclohexylenepropane, Examples include isophorone diamine.

  Examples of the aliphatic dicarboxylic acid include adipic acid, sebacic acid, azelaic acid, and dodecanedicarboxylic acid. Examples of the alicyclic dicarboxylic acid include 1,4-cyclohexanedicarboxylic acid. Examples of the cyclic amide monomer include ε-caprolactam and ω-laurolactam.

  Among the above-mentioned amorphous polyamides, amorphous polyamides having a glass transition temperature of 100 ° C. or higher are preferable, and nylon 6T / 6I obtained by polycondensation of 1,6-hexamethylenediamine, terephthalic acid and isophthalic acid is particularly preferable.

Examples of the aliphatic polyamide include a ring-opening polymer of a cyclic amide monomer, a polycondensate of an aliphatic dicarboxylic acid and an aliphatic diamine, and the like. As the cyclic amide monomer, aliphatic dicarboxylic acid, and aliphatic diamine, the same ones as described above can be used. Specific examples of the aliphatic polyamide include nylon 6, nylon 66, nylon 12, nylon 6,12, and copolymers made of these nylons. Of these, nylon 6, a copolymer of nylon 6 and nylon 66 is preferable.

  Such an amorphous polyamide layer (A) is excellent in faecal odor blocking performance, and the thickness of the amorphous polyamide layer (A) can be made thinner than the conventional odor blocking layer. The thickness of the amorphous polyamide layer (A) is usually 1 to 30 μm, preferably 1 to 15 μm, more preferably 1.5 to 10 μm. Such a thin amorphous polyamide layer (A) has excellent flexibility as well as excellent stool odor blocking performance.

(B) Polyolefin layer:
Examples of the resin that forms the polyolefin layer (B) include polyolefins such as low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), and polypropylene (PP). Resin; ethylene-vinyl acetate copolymer (EVA), ethylene-methyl methacrylate copolymer (EMMA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ethylene-ethyl Examples thereof include acrylate-maleic anhydride copolymer (E-EA-MAH), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ionomer (ION) and the like. Of these, linear low density polyethylene having a density of 0.89 to 0.93 polymerized with a metallocene catalyst is preferably used because it is excellent in heat sealability, strength, touch and flexibility.

(C) Adhesive resin layer:
The resin used for the adhesive resin layer (C) is not particularly limited as long as it can adhere the polyamide layer and the polyolefin layer, but a polyolefin resin modified with an acid such as maleic anhydride is preferable. Of the acid-modified polyolefin resins, maleic anhydride-modified polyethylene is preferable. In particular, maleic anhydride-modified low-density linear polyethylene is preferably used in terms of excellent adhesiveness.

(D) Aliphatic polyamide layer:
The aliphatic polyamide layer (D) is formed in order to improve the strength of the stool odor blocking film. Examples of the aliphatic polyamide used here include the same aliphatic polyamides as described above. Of these, nylon 6, and a copolymer of nylon 6 and nylon 66 are preferably used.

A known deodorizing agent can be added to each of the layers as necessary. Thereby, the odor blocking effect can be further improved.
[Stool odor blocking film]
The stool odor blocking film according to the present invention includes the amorphous polyamide layer (A), the polyolefin layer (B) and / or the adhesive resin layer (C), and the aliphatic polyamide as necessary. It has a layer (D). This fecal odor blocking film may be produced by laminating these layers in the order described later, or may be produced by co-extrusion of the raw materials constituting each layer. Of these, the coextrusion method is preferable, and it is particularly preferable to use a water-cooled coextrusion inflation apparatus. Since the fecal odor blocking film produced by the water-cooled coextrusion method exhibits better flexibility, it can be suitably used for applications such as a simple toilet tubular film. Further, another film can be bonded to the stool odor blocking film produced by the coextrusion method by a laminating method.

  The thickness of the stool odor blocking film is appropriately set depending on the application, but is usually 20 to 100 μm, preferably 20 to 80 μm, and more preferably 20 to 70 μm. When the film thickness is less than the above lower limit, the strength of the film may be reduced, and when it exceeds the upper limit, the flexibility of the film may be reduced.

Hereinafter, although the stool odor blocking film according to the present invention will be specifically described with reference to the drawings, the stool odor blocking film according to the present invention is not limited thereto.
<Stool odor blocking film (i)>
The fecal odor blocking film (i) is a film in which a polyolefin layer (B), an amorphous polyamide layer (A), and a polyolefin layer (B) are joined in this order (see FIG. 1). The polyolefin layer (B) is preferably formed by adding the acid-modified polyolefin resin exemplified in the adhesive resin layer (C) to the polyolefin constituting the layer (B). By adding the acid-modified polyolefin resin, the adhesive strength between the amorphous polyamide layer (A) and the polyolefin layer (B) is improved, and delamination due to film deformation is less likely to occur.

  This fecal odor blocking film (i) has a ratio (A / B) between the thickness of the layer (A) and the thickness of the remaining layer (the sum of the thicknesses of the two layers (B)). As 100%, it is usually 3-30% / 70-97%, preferably 5-15% / 85-95%. As described above, the stool odor blocking film (i) has a thin amorphous polyamide layer (A) and is excellent in flexibility. Furthermore, when the ratio (A / B) is in the above range, the stool odor blocking film (i) has high strength and excellent flexibility.

The ratio of the thicknesses of the two layers (B) of the stool odor blocking film (i) is not particularly limited, but is preferably 3/7 to 7/3, and more preferably 4/6 to 6/4.
<Stool odor blocking film (ii)>
The fecal odor blocking film (ii) is a film in which an amorphous polyamide layer (A) and a polyolefin layer (B) are bonded via an adhesive resin layer (C) (see FIG. 2). Since the amorphous polyamide layer (A) and the polyolefin layer (B) joined via the adhesive resin layer (C) are joined via the adhesive resin layer (C) over the entire surface, the film Delamination due to deformation is difficult to occur.

  This fecal odor blocking film (ii) has a ratio (A / (B + C)) of the thickness of the layer (A) and the thickness of the remaining layers (the total thickness of the layers (B) and (C)). The total film thickness is 100%, usually 3-30% / 70-97%, preferably 5-15% / 85-95%. As described above, the fecal odor blocking film (ii) has a thin amorphous polyamide layer (A) and is excellent in flexibility. Furthermore, when the ratio (A / (B + C)) is within the above range, the stool odor blocking film (ii) has high strength and excellent flexibility.

<Stool odor blocking films (iii) and (iv)>
The stool odor blocking film (iii) is composed of an amorphous polyamide layer (A
) On which the polyolefin layer (B) is bonded via the adhesive resin layer (C) (see FIG. 3). In addition, the stool odor blocking film (iv) was obtained by bonding the aliphatic polyamide layer (D) to the amorphous polyamide layer (A) of the stool odor blocking film (ii) via the adhesive resin layer (C). It is a film (see FIG. 4).

  These stool odor blocking films are obtained by laminating an adhesive resin layer (C) on the amorphous polyamide layer (A) of the stool odor blocking film (ii), and further, a polyolefin layer (B) or an aliphatic group thereon. The polyamide layer (D) may be laminated, or may be produced by coextrusion of five raw materials constituting each layer. Among these, it is preferable to manufacture by a coextrusion method.

  In these feces odor blocking films, the amorphous polyamide layer (A) and the polyolefin layer (B) or the aliphatic polyamide layer (D) are bonded to the entire surface of the film through the adhesive resin layer (C). Therefore, delamination due to film deformation is unlikely to occur.

The fecal odor blocking film (iii) comprises the thickness of the layer (A) and the thickness of the remaining layers (two layers (B) and 2
The ratio (A / (B + C)) to the total thickness of the two layers (C) is usually 3 to 30% / 70 to 97%, preferably 5 to 15% / 85 ~ 95%. As described above, the fecal odor blocking film (iii) has a thin amorphous polyamide layer (A) and is excellent in flexibility. Furthermore, when the ratio (A / (B + C)) is within the above range, the stool odor blocking film (iii) has high strength and excellent flexibility. The ratio of the thicknesses of the two layers (B) of the stool odor blocking film (iii) is not particularly limited, but is preferably 3/7 to 7/3, and more preferably 4/6 to 6/4.

  The fecal odor blocking film (iv) has a ratio (A) of the thickness of the layer (A) and the thickness of the remaining layers (the sum of the thicknesses of the layer (B), the two layers (C), and the layer (D)). / (B + C + D)) is usually 3-30% / 70-97%, preferably 5-15% / 85-95%, with the entire film thickness being 100%. As described above, the fecal odor blocking film (iv) has a thin amorphous polyamide layer (A) and is excellent in flexibility. Furthermore, when the ratio (A / (B + C + D)) is within the above range, the stool odor blocking film (iv) has high strength and excellent flexibility, and delamination due to film deformation hardly occurs. The ratio (B / D) of the thickness (B / D) between the layer (B) and the layer (D) of the stool odor blocking film (iv) is not particularly limited, but is preferably 6/4 to 9/1, more preferably 7 / 3-9 / 1.

Of the stool odor blocking films (iii) and (iv), the stool odor blocking film (iii) is used when more flexibility is required, and the stool odor blocking film (iv) when more strength is required.
) Is used.

<Stool odor blocking film (v)>
The fecal odor blocking film (v) is a film in which an amorphous polyamide layer (A) and an adhesive resin layer (C) are joined in this order (see FIG. 5). In the stool odor blocking film (v), the ratio (A / C) of the thickness of the layer (A) to the thickness of the layer (C) is usually 3 to 30% / 70 to 97%, with the total film thickness being 100%. , Preferably 5-15% / 85-95%. As described above, the fecal odor blocking film (v) has a thin amorphous polyamide layer (A) and is excellent in flexibility. Furthermore, when the ratio (A / C) is in the above range, the stool odor blocking film (v) exhibits excellent flexibility.

<Stool odor blocking film (vi)>
The fecal odor blocking film (vi) is a film in which the adhesive resin layer (C), the amorphous polyamide layer (A), and the adhesive resin layer (C) are joined in this order (see FIG. 6). . The fecal odor blocking film (vi) has a ratio (A / C) of the thickness of the layer (A) to the thickness of the remaining layer (the sum of the thicknesses of the two layers (C)) of 100% of the total film thickness. % Is usually 3 to 30% / 70 to 97%, preferably 5 to 15% / 85 to 95%. As described above, the stool odor blocking film (vi) has a thin amorphous polyamide layer (A) and is excellent in flexibility. Furthermore, when the ratio (A / C) is within the above range, the stool odor blocking film (vi) exhibits excellent flexibility.

[Cylinder film for simple toilet]
The tubular film for simple toilets is usually used as follows. First, the tubular film is set on the outside of the toilet with the bellows contracted, and the tubular film is pulled out from there and introduced from the outside to the inside of the toilet. At this time, the outermost layer and the innermost layer of the cylindrical film are reversed. And it will be in the state which can be used for excretion by sealing the bottom part of the cylindrical film in a toilet bowl, and forming a bag. After excrement enters the bag, the upper part of the tubular film inside the toilet is sealed and melted so as to seal the excrement. Sealed excreta is disposed of. On the other hand, the blown tubular film on the inside of the toilet bowl has a bag shape with the bottom sealed, and is pulled out again and can be used for excretion.

  In this method of use, the tubular film is set in a state of being contracted in a bellows shape, so that flexibility is required. Also, pinhole resistance is required so that no pinholes are generated during expansion and contraction. Furthermore, the outer surface of the tubular film set on the outer side of the toilet becomes an inner surface when guided to the inner side of the toilet, and heat sealability is required when forming a bag. In addition, when the tubular film is introduced from the outside of the toilet bowl to the inside so as to cover the upper surface of the toilet seat, the outer surface of the tubular film set on the outside of the toilet bowl is good because it contacts the skin on the upper surface of the toilet seat. The touch is also required. On the other hand, the inner surface of the tubular film set on the outside of the toilet comes into contact with the toilet when the tubular film is introduced inside the toilet and becomes an outer surface when guided to the inside of the toilet, so that strength is required.

The fecal odor blocking film according to the present invention can be produced in a cylindrical shape and used as a simple toilet tubular film. Specifically, the tubular film for a simple toilet according to the present invention is manufactured with the following layer structure.
(1) A cylindrical film joined from the outside in the order of polyolefin layer (B) / amorphous polyamide layer (A).
(2) A cylindrical film joined from the outside in the order of polyolefin layer (B) / amorphous polyamide layer (A) / polyolefin layer (B).
(3) Joined from the outside in the order of polyolefin layer (B) / adhesive resin layer (C) / amorphous polyamide layer (A) / adhesive resin layer (C) / aliphatic polyamide layer (D) Tubular film.

In the cylindrical films (1) and (2), the amorphous polyamide layer (A) and the polyolefin layer (B) may be bonded via the adhesive resin layer (C).
In the tubular film (2), the thickness ratio (outer / inner) of the outermost polyolefin layer (B) and the innermost polyolefin layer (B) is not particularly limited, but is 3/7 to 5 /. 5 is preferable, and more preferably 4/6 to 5/5.

  These tubular films for simple toilets are excellent in flexibility and pinhole resistance. Moreover, since the outermost layer is a polyolefin layer (B), it is excellent also in the touch. Furthermore, the outermost layer is a polyolefin layer (B) excellent in heat sealability, and when the tubular film is introduced inside the toilet bowl, the polyolefin layer (B) becomes the innermost layer, so that it is easily sealed after excretion. In addition, it has excellent sealing properties.

  In the tubular film (3), since the innermost layer is an aliphatic polyamide layer (D) having excellent strength, pinholes are less likely to be generated when introduced into the toilet bowl, and the outermost layer after being introduced into the toilet bowl. Therefore, it is hard to break after sealing.

Moreover, the cylindrical film for simple toilets which concerns on this invention can also be manufactured by the following layer structures.
(4) A tubular film joined in the order of adhesive resin layer (C) / amorphous polyamide layer (A) from the outside.
(5) A cylindrical film joined in the order of adhesive resin layer (C) / amorphous polyamide layer (A) / adhesive resin layer (C) from the outside.

  These tubular films for simple toilets are also excellent in flexibility and pinhole resistance. In addition, the outermost layer is an adhesive resin layer (C) having excellent adhesiveness, and when the tubular film is introduced into the toilet bowl, the adhesive resin layer (C) becomes the innermost layer, so that it can be easily removed after excretion. It can be sealed and has excellent sealing properties.

[Various odor blocking bags]
The stool odor blocking film according to the present invention can be produced in various shapes and used for various stool odor blocking applications. Examples of such applications include diaper collection bags, pet excrement disposal bags, feces odor blocking outer bags, and the like.

  The diaper collection bag is a single bag for collecting and processing diapers used by infants, elderly people, sick people, and the like. Normally, a plurality of collected diapers are stored in a diaper collection bag, and when a certain number of diapers are reached, processing such as disposal and reuse is performed. The pet excreta disposal bag is a personal bag for collecting and processing stool excreted by pets such as dogs and cats outdoors or indoors. The outer bag for stool odor blocking is a packaging bag for wrapping a package in which contents that emit stool odor are packaged.

  The stool odor blocking bag according to the present invention can be manufactured, for example, by molding the stool odor blocking film into a bag shape. At this time, the bottom of the film formed into a cylindrical shape may be sealed to be formed into a bag shape, or two films may be stacked and sealed on three sides to be formed into a bag shape. The former is preferably used.

The feces odor blocking bag according to the present invention is specifically manufactured with the following layer structure.
(1) A bag for blocking stool odor bonded in the order of an amorphous polyamide layer (A) / polyolefin layer (B) from the outside.
(2) A bag for blocking stool odor, joined in the order of polyolefin layer (B) / amorphous polyamide layer (A) / polyolefin layer (B) from the outside.
(3) Joined in the order of aliphatic polyamide layer (D) / adhesive resin layer (C) / amorphous polyamide layer (A) / adhesive resin layer (C) / polyolefin layer (B) from the outside. Bag for blocking stool odor.
(4) A bag for blocking stool odor bonded in the order of the amorphous polyamide layer (A) / adhesive resin layer (C) from the outside.
(5) A bag for blocking stool odor bonded in the order of adhesive resin layer (C) / amorphous polyamide layer (A) / adhesive resin layer (C) from the outside.

  These stool odor blocking bags are excellent in flexibility and pinhole resistance. Moreover, since the innermost layer is the polyolefin layer (B), it has excellent heat sealability and excellent sealing properties.

  In the stool odor blocking bag (3), the outermost layer exposed to high temperature by heat sealing is an aliphatic polyamide layer (D) having a high melting point, and the innermost layer to be heat sealed is a polyolefin layer (B). Therefore, it has an excellent balance between heat resistance and heat sealability.

  These bags for blocking stool odor are desirably manufactured by a coextrusion method, and it is particularly preferable to use a water-cooled coextrusion inflation apparatus. A bag for blocking stool odor produced by a water-cooled coextrusion method exhibits better flexibility. Further, another film may be bonded to the outer surface or inner surface of these stool odor blocking bags by a laminating method.

  In the diaper collection bag, pet excrement disposal bag, and feces odor blocking outer bag according to the present invention, it is easy to put a package that wraps the collected diaper, pet excrement, and stool odor content into the bag, and there is an odor after storage. The shape of the bag, the sealing method, and the like can be appropriately selected so as not to leak outside.

[Example]
EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited at all by this Example. Moreover, the stool odor blocking property evaluation method of the stool odor blocking films obtained in Examples and Comparative Examples is shown.

[Evaluation method of fecal odor blocking performance]
One end of the tubular stool odor blocking film obtained in the examples or comparative examples was heat-sealed to prepare a bag made of the stool odor blocking film. In a room adjusted to a temperature of 20 ° C. and a relative humidity of 65%, the following stool substitute odor substance was put in this bag, and the other end was heat-sealed to seal the bag.

(Odor substance)
Ammonia: 5 cc of 25% aqueous ammonia solution.
Skatole: 1 g of 3-methyl-1H-indole.
Hydrogen sulfide: 1 mL of 700 ppm sodium sulfide aqueous solution and 1 N sulfuric acid
Hydrogen sulfide was generated by mixing with 0.1 mL.

The sealed bag was put into a wide-mouth bottle having an internal volume of 500 mL, the bottle mouth was sealed with a stopper, and the bottle was allowed to stand at a temperature of 20 ° C. and a relative humidity of 65% for 24 hours. Thereafter, a sensory test was performed on the odor in the wide-mouth bottle, and the fecal odor blocking performance was evaluated according to the following criteria.
(Odor blocking evaluation criteria)
A: It does not smell at all.
B: It smells slightly.
C: It smells quite a bit.

Using a five-type five-layer coextrusion water-cooled inflation apparatus, the first layer is a linear low density polyethylene (LLDPE, density: 0.915 g / cm ³ ) polymerized using a metallocene catalyst, the second layer is anhydrous maleic Cylindrical feces odor blocking film having a total film thickness of 70 μm, comprising acid-modified linear low density polyethylene (modified PE), third layer made of amorphous polyamide, fourth layer made of modified PE, and fifth layer made of LLDPE Got. Note that the first layer, the second layer, the third layer, the fourth layer, and the fifth layer are sequentially formed from the outermost layer. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

  A tubular fecal odor blocking film having a total thickness of 70 μm was obtained in the same manner as in Example 1 except that 6-nylon (6-NY) was used instead of LLDPE for the first layer. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

  90 parts by weight of amorphous polyamide and 10 parts by weight of 6-NY were mixed to prepare polyamide composition 1 containing 90% by weight of amorphous polyamide. A cylindrical stool odor blocking film having a total thickness of 70 μm was obtained in the same manner as in Example 1 except that the polyamide composition 1 was used in place of the amorphous polyamide in the third layer. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

  A cylindrical shape having a total thickness of 70 μm as in Example 1 except that ethylene-vinyl acetate copolymer (EVA, vinyl acetate content: 10 wt%) was used for the first layer and the fifth layer instead of LLDPE. A fecal odor blocking film was obtained. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

Using a three-type three-layer co-extrusion water-cooled inflation apparatus, a cylindrical stool having a total thickness of 70 μm, in which the first layer is made of the modified PE, the second layer is made of amorphous polyamide, and the third layer is made of the modified PE. A barrier film was obtained. In addition, it is set as the 1st layer, the 2nd layer, and the 3rd layer in order from the outermost layer. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

  Using a two-type two-layer coextrusion water-cooled inflation apparatus, a tubular stool odor blocking film having a total film thickness of 70 μm, in which the first layer was made of amorphous polyamide and the second layer was made of the modified PE, was obtained. In addition, it is set as the 1st layer and the 2nd layer in order from the outermost layer. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

[Comparative Example 1]
Using a single-layer inflation device, a cylindrical stool odor blocking film made of LLDPE and having a thickness of 70 μm was obtained. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

[Comparative Example 2]
A cylindrical stool with a total thickness of 70 μm was used in the same manner as in Example 1 except that an ethylene-vinyl alcohol copolymer (EVOH, ethylene content: 44 mol%) was used for the third layer instead of amorphous polyamide. A barrier film was obtained. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

[Comparative Example 3]
A tubular fecal odor blocking film having a total thickness of 70 μm was obtained in the same manner as in Example 1 except that 6-nylon (6-NY) was used in place of amorphous polyamide in the third layer. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

[Comparative Example 4]
60 parts by weight of amorphous polyamide and 40 parts by weight of 6-NY were mixed to prepare polyamide composition 2 containing 60% by weight of amorphous polyamide. A cylindrical stool odor blocking film having a total thickness of 70 μm was obtained in the same manner as in Example 1 except that the polyamide composition 2 was used in place of the amorphous polyamide in the third layer. Table 1 shows the layer structure of this tubular stool odor blocking film and the evaluation results of the stool odor blocking performance.

FIG. 1 is a cross-sectional view showing an example of a stool odor blocking film according to the present invention. FIG. 2 is a cross-sectional view showing an example of a stool odor blocking film according to the present invention. FIG. 3 is a cross-sectional view showing an example of a stool odor blocking film according to the present invention. FIG. 4 is a cross-sectional view showing an example of a stool odor blocking film according to the present invention. FIG. 5 is a cross-sectional view showing an example of a stool odor blocking film according to the present invention. FIG. 6 is a cross-sectional view showing an example of a stool odor blocking film according to the present invention.

Explanation of symbols

A Amorphous polyamide layer B Polyolefin layer C Adhesive resin layer D Aliphatic polyamide layer

Claims (16)

  A fecal odor blocking film comprising an amorphous polyamide layer (A) containing 70% by weight or more of amorphous polyamide and a polyolefin layer (B).   The amorphous polyamide layer (A) and the polyolefin layer (B) are joined in the order of layer (B) / layer (A) / layer (B). Stool odor blocking film.   The stool odor blocking film according to claim 1 or 2, wherein the amorphous polyamide layer (A) is bonded to the polyolefin layer (B) through an adhesive resin layer (C).   The stool odor blocking film further contains an aliphatic polyamide layer (D), and the amorphous polyamide layer (A), the polyolefin layer (B), and the aliphatic polyamide layer (D) are adhesive resins. 2. The stool according to claim 1, wherein layers (D) / layers (C) / layers (A) / layers (C) / layers (B) are joined in this order via the layer (C). Odor blocking film.   A fecal odor blocking film comprising an amorphous polyamide layer (A) containing 70% by weight or more of an amorphous polyamide and an adhesive resin layer (C).   The stool odor blocking film according to any one of claims 1 to 5, which is a film produced by a coextrusion method.   It consists of the stool odor shielding film of Claim 1, and the said amorphous polyamide layer (A) and polyolefin layer (B) are joined in order of the layer (B) / layer (A) from the outer side. A tubular film for simple toilets.   It consists of the stool odor blocking film according to claim 2, wherein the amorphous polyamide layer (A) and the polyolefin layer (B) are in the order of layer (B) / layer (A) / layer (B) from the outside. A tubular film for a simple toilet characterized by being bonded.   The cylindrical shape for a simple toilet according to claim 7 or 8, wherein the amorphous polyamide layer (A) is joined to the polyolefin layer (B) through an adhesive resin layer (C). the film.   It consists of a stool odor blocking film according to claim 4, wherein the amorphous polyamide layer (A), the polyolefin layer (B) and the aliphatic polyamide layer (D) are interposed via an adhesive resin layer (C). A tubular film for a simple toilet, which is bonded from the outside in the order of layer (B) / layer (C) / layer (A) / layer (C) / layer (D).   It consists of a stool odor blocking film according to claim 5, wherein the amorphous polyamide layer (A) and the adhesive resin layer (C) are in the order of layer (C) / layer (A), or layers from the outside. (C) / layer (A) / layer (C) It is comprised in order of the cylinder film for simple toilets characterized by the above-mentioned.   It consists of a toilet bowl and the cylindrical film in any one of Claims 7-11 with which it attached to the outer side of this toilet bowl, this cylindrical film was introduced into the inner side from the outer side of the toilet bowl, and was introduced into the inner side of the toilet bowl A simple toilet with the bottom of the tubular film sealed.   A stool for blocking stool odor comprising the stool odor blocking film according to claim 1.   A diaper collection bag comprising the bag for blocking stool odor according to claim 13.   A pet excreta disposal bag comprising the stool odor blocking bag according to claim 13.   An outer bag for blocking stool odor, comprising the bag for blocking stool odor according to claim 13.

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