JP7580903B2 - Squeeze container - Google Patents

Description

The present invention relates to a squeeze container.

Metal cans, glass bottles, various plastic containers, etc. are commonly used as packaging containers. Of these, plastic containers are easy to mold and can be manufactured at low cost, so they are widely used for various purposes. For example, plastic containers are used as squeeze containers that hold ketchup, mayonnaise, etc., and the contents are pushed out by squeezing the body. These packaging containers are required to prevent deterioration of the contents and loss of flavor caused by oxygen remaining in the container or oxygen that permeates the container wall. In particular, oxygen does not permeate through the container wall in metal cans and glass bottles, but oxygen may permeate through the container wall in plastic containers.

In order to suppress the oxygen permeation, plastic containers are made to have a multi-layer structure. For example, in addition to outer and inner layers containing an olefin resin, an oxygen barrier layer containing an oxygen barrier resin such as an ethylene-vinyl alcohol copolymer (hereinafter also referred to as EVOH) is provided as the layers constituting the plastic container (for example, Patent Document 1). These layers are generally bonded to each other via an adhesive layer containing an adhesive resin. Meanwhile, Patent Document 2 discloses a multi-layer packaging material that enhances the adhesive strength when inner and outer layers mainly made of polyolefin and an intermediate layer mainly made of EVOH are laminated together to form the multi-layer structure, without providing the adhesive layer between each layer.

When oxygen permeation is suppressed by an oxygen barrier layer containing EVOH as a main component, if a content containing a large amount of moisture is stored in the container, the oxygen barrier properties of the oxygen barrier layer will decrease due to the humidity. To prevent this, the oxygen barrier layer is usually placed on the side with lower humidity, that is, as far outward as possible from the container. Also, to simplify the layer structure of the container, the oxygen barrier layer is usually provided as a single layer. On the other hand, when manufacturing containers by direct blow molding, a large amount of scrap such as burrs is discharged, and from the viewpoint of cost reduction and environmental conservation, this is usually crushed, mixed with virgin material, and recycled as part of the container (regrind layer). Also, as mentioned above, the oxygen barrier layer is placed as far outward as possible from the container, so the regrind layer is usually placed inside the oxygen barrier layer.

In recent years, with the diversification of contents packed into plastic containers, there is an increased demand to suppress odors originating from the containers. The regrind layer contains materials that have been subjected to heat history, and is therefore thought to be a cause of odor. Patent Document 3 describes the provision of an odor barrier layer to prevent the migration of odorous components originating from an oxygen absorbing layer that may be contained in a plastic container to the inside and outside.

JP 2001-253426 A Japanese Patent Application Publication No. 49-35482 JP 2005-1371 A

From the viewpoint of sufficiently blocking odorous components originating from the regrind layer, the inventors attempted to place oxygen barrier layers made of EVOH alone on both sides of the regrind layer. However, when multiple oxygen barrier layers made of EVOH alone were placed, the rigidity increased when used as a squeeze container, and the squeezability decreased.

The present invention aims to provide a squeeze container that can suppress the transfer of odors from the regrind layer to the contents and has high squeezability.

The squeeze container according to the present invention is a squeeze container including, from the outside, an oxygen barrier layer A, a regrind layer, and an oxygen barrier layer B in this order,
The oxygen barrier layer A and the oxygen barrier layer B each contain an ethylene-vinyl alcohol copolymer, polyethylene, and a compatibilizer.

The present invention provides a squeeze container that can suppress the transfer of odors from the regrind layer to the contents and has high squeezability.

FIG. 1 is a front view showing an example of a squeeze container according to the present invention. FIG. 1 is a cross-sectional view showing an example of a layer structure of a squeeze container according to the present invention.

The squeeze container according to the present invention includes, from the outside, an oxygen barrier layer A, a regrind layer, and an oxygen barrier layer B, in this order. The oxygen barrier layer A and the oxygen barrier layer B each include an ethylene-vinyl alcohol copolymer, polyethylene, and a compatibilizer. That is, the oxygen barrier layer A includes an ethylene-vinyl alcohol copolymer, polyethylene, and a compatibilizer, and the oxygen barrier layer B includes an ethylene-vinyl alcohol copolymer, polyethylene, and a compatibilizer.

In the squeeze container according to the present invention, not only is an oxygen barrier layer A provided outside the regrind layer to suppress oxygen permeation, but an oxygen barrier layer B is also provided inside the regrind layer, so that the migration of odorous components contained in the regrind layer to the contents can be suppressed. In addition, an oxygen barrier layer made of EVOH alone has high rigidity, but the squeeze container according to the present invention uses oxygen barrier layer A and oxygen barrier layer B containing polyethylene and a compatibilizer in addition to EVOH, so that the rigidity is low and the squeezeability (extrusion property) is high. Furthermore, since the oxygen barrier layer A and the oxygen barrier layer B have adhesive properties, there is no need to provide a separate adhesive layer, and the manufacturing process can be simplified. The details of the present invention will be described below.

An example of a squeeze container according to the present invention is shown in FIG. 1. The squeeze container shown in FIG. 1 has a mouth 1 that can be opened and closed with a cap, a body 2 that is the center of the squeeze container, and a bottom 3. By pressing the body 2, the contents are pushed out from the mouth 1. Note that the shape of the body 2 of the squeeze container according to the present invention may be any shape in cross section, and may not have a bottom 3. For example, the end portion of the body 2 may be sealed by welding or folding, forming a tube shape.

The squeeze container according to the present invention is not particularly limited in its layer structure, so long as it includes, from the outside, an oxygen barrier layer A, a regrind layer, and an oxygen barrier layer B in this order. For example, the squeeze container may include an outer layer and an inner layer in addition to the oxygen barrier layer A, the regrind layer, and the oxygen barrier layer B, and may further include other layers. Examples of the other layers include a virgin layer made of a virgin material, which will be described later. It is preferable that the squeeze container does not include an oxygen absorbing layer having oxygen absorption properties. In addition, since the oxygen barrier layer A and the oxygen barrier layer B have adhesive properties, it is preferable that the squeeze container does not include a general adhesive layer other than the oxygen barrier layer A and the oxygen barrier layer B. Here, the general adhesive layer refers to a layer made of an adhesive resin that does not include a material having oxygen barrier properties, and is, for example, a layer made of a modified polyolefin resin. In addition, the squeeze container has at least two oxygen barrier layers, but may have three or more layers.

The squeeze container may have, for example, a five-layer structure of outer layer/oxygen barrier layer A/regrind layer/oxygen barrier layer B/inner layer, a six-layer structure of outer layer/oxygen barrier layer A/virgin layer/regrind layer/oxygen barrier layer B/inner layer, or a seven-layer structure of outer layer/oxygen barrier layer A/virgin layer/regrind layer/virgin layer/oxygen barrier layer B/inner layer. As an example, FIG. 2 shows a cross-sectional view of a squeeze container having a seven-layer structure of outer layer 4/oxygen barrier layer A5/virgin layer 6/regrind layer 7/virgin layer 6/oxygen barrier layer B8/inner layer 9.

The thickness of the thinnest part of the body of the squeeze container is preferably 180 to 1500 μm, more preferably 200 to 1200 μm, and even more preferably 300 to 1100 μm. By having the thickness of 180 μm or more, the container does not deform or break when squeezed, and the contents can be stably stored. Furthermore, if the thickness exceeds 1500 μm, squeezing becomes difficult. Note that the body of the squeeze container here refers to the content storage part excluding the mouth, and the part in the range 5 mm above the contact surface of the bottom.

After filling a squeeze container with ultrapure water at 85°C and sealing it, sterilizing it by inversion for 10 minutes, cooling it to room temperature, and storing it for one week, the TOC (Total Organic Carbon) amount contained in the ultrapure water is preferably less than 0.7 ppm by mass, more preferably 0.5 ppm by mass or less, and even more preferably 0.4 ppm by mass or less. The TOC amount is an index value indicating the amount of odorous components such as aldehydes and ketones contained in the regrind layer that transfer to the contents, and the smaller the TOC amount, the less odorous components transfer to the contents. When the TOC amount is less than 0.7 ppm by mass, the transfer of odorous components to the contents is sufficiently suppressed. The TOC amount can be measured using a total organic carbon meter (product name: TOC-V CPH, manufactured by Shimadzu Corporation).

Regarding the rigidity of the squeeze container, the compressive strength in the vertical direction (direction from the mouth of the squeeze container to the bottom) of the squeeze container is preferably 70N or less, and more preferably 40 to 70N. When the compressive strength is 70N or less, the contents of the squeeze container can be easily pushed out to the outside, improving the squeezability. Furthermore, when the compressive strength is 40N or more, the container can be made to stand on its own. The compressive strength is a value measured by the following method. The squeeze container is filled with water in an amount equal to the amount of the contents, and after conditioning at 23°C for 24 hours, the squeeze container is compressed in the vertical direction using a compression tester to measure the compressive strength. Compression is performed at 20mm/min, without a V-notch. As the compression tester, a Tensilon universal testing machine (product name: RTG-1310, manufactured by A&D Co., Ltd.) can be used.

(Oxygen Barrier Layer A and Oxygen Barrier Layer B)
The oxygen barrier layer A and the oxygen barrier layer B each contain EVOH, polyethylene, and a compatibilizer. Since the oxygen barrier layer A and the oxygen barrier layer B contain EVOH having gas barrier properties, they have the function of blocking the permeation of oxygen and odorous components contained in the regrind layer. In addition, since EVOH and polyethylene are made compatibilized by the compatibilizer and distributed homogeneously, the oxygen barrier layer A and the oxygen barrier layer B exhibit excellent adhesion to the outer layer, inner layer, and regrind layer due to the polyethylene. The composition and thickness (mass ratio) of the oxygen barrier layer A and the oxygen barrier layer B may be the same or different.

EVOH is preferably a saponified copolymer obtained by saponifying an ethylene-vinyl acetate copolymer having an ethylene content of 20 to 60 mol% so that the degree of saponification is 96 mol% or more, particularly 99 mol% or more. From the viewpoint of gas barrier properties, the ethylene content is preferably 20 to 38 mol%. The EVOH (saponified ethylene-vinyl acetate copolymer) can have an intrinsic viscosity of 0.01 dl/g or more, particularly 0.05 dl/g or more, measured at 30°C in a mixed solvent having a phenol/water mass ratio of 85/15.

The polyethylene is preferably low-density polyethylene (hereinafter, also referred to as LDPE). LDPE is a polyethylene having a density in the range of 0.910 g/cm ³ or more and less than 0.930 g/cm ³ , and includes linear low-density polyethylene. From the viewpoint of suppressing phase separation with EVOH during molding and preventing delamination, the melt flow rate (MFR) of LDPE at 190° C. and a load of 2.16 kg is preferably 0.1 g/10 min or more. From the viewpoint of moldability, the MFR is preferably 30 g/10 min or less. The MFR is more preferably 0.3 to 10 g/10 min.

The compatibilizer is used to make EVOH and polyethylene compatible, reduce the size of the phase separation structure of the two, and increase the cohesive force between EVOH and polyethylene. Examples of the compatibilizer include carboxylic acids or their anhydrides such as maleic acid, itaconic acid, and fumaric acid, maleic acid-polyethylene copolymers, maleic anhydride-polyethylene copolymers, graft-modified olefin resins graft-modified with amides and esters, ethylene-(meth)acrylic acid copolymers, ethylene-vinyl acetate copolymers, saponified ethylene-vinyl acetate copolymers with a saponification degree of 20 to 100%, ethylene-vinyl alcohol copolymers with an ethylene content of 85% or more, hydrotalcite compounds, and ionomers (ion-crosslinked olefin copolymers). These may be used alone or in combination of two or more. Among these, the compatibilizer is preferably a resin that does not have an acid or acid anhydride that chemically reacts with EVOH, and in particular, an ionomer.

Each of the oxygen barrier layers A and B preferably contains EVOH and polyethylene in a mass ratio of 95:5 to 50:50, more preferably 90:10 to 55:45, even more preferably 85:15 to 60:40, and particularly preferably 80:20 to 65:35. Furthermore, each of the oxygen barrier layers A and B preferably contains 1 to 49 parts by mass of a compatibilizer per 100 parts by mass of the total amount of EVOH and polyethylene, more preferably 2 to 40 parts by mass of a compatibilizer, even more preferably 3 to 30 parts by mass of a compatibilizer, and particularly preferably 4 to 20 parts by mass of a compatibilizer. By each of the oxygen barrier layers A and B containing EVOH, polyethylene, and a compatibilizer within the above mass ratio range, the rigidity of the squeeze container can be reduced while maintaining the gas barrier properties.

The EVOH, polyethylene, and compatibilizer can be mixed, for example, by melt-kneading in a kneading section provided in an extruder or injector.

The ratio of the total mass of the oxygen barrier layer A and the oxygen barrier layer B to the mass of the squeeze container is preferably 1 to 30% by mass, more preferably 3 to 20% by mass, and even more preferably 5 to 10% by mass. When the ratio is 1% by mass or more, the permeation of oxygen and odorous components contained in the regrind layer can be sufficiently blocked. Furthermore, when the ratio is 30% by mass or less, the squeezability can be improved.

The ratio of the mass of the oxygen barrier layer B to the mass of the squeeze container is preferably 0.5 to 15 mass%, more preferably 1.5 to 10 mass%, and even more preferably 2.5 to 5 mass%. When the ratio is 0.5 mass% or more, the permeation of odorous components contained in the regrind layer can be sufficiently blocked. Furthermore, when the ratio is 15 mass% or less, the squeezability can be improved. The preferred range of the ratio of the mass of the oxygen barrier layer A to the mass of the squeeze container is the same as that of the oxygen barrier layer B.

(Regrind layer)
The regrind layer is also called a repro layer, and is a layer containing scrap resin obtained by crushing the resin and burrs discharged at the start of molding, which are parts other than the container. In other words, the scrap resin is a mixture of materials constituting each layer contained in the container, and the regrind layer is a layer containing the mixture. By reusing the scrap resin, the amount of virgin material, which is unused resin, can be reduced, which is preferable from the viewpoint of environmental conservation and also reduces manufacturing costs. However, since the scrap resin has a thermal history, it contains odorous components such as carbonyl group-containing compounds such as aldehydes and ketones, which are decomposition products of the resin. In the squeeze container according to the present invention, the oxygen barrier layer B blocks the migration of the odorous components to the contents.

The regrind layer can be made of the scrap resin as well as the virgin material. For example, LDPE can be used as the virgin material. However, it is preferable that the proportion of the scrap resin in the regrind layer is 1 to 100% by mass. In other words, the regrind layer can be made of the scrap resin.

The ratio of the mass of the regrind layer to the mass of the squeeze container is not particularly limited, but can be, for example, 30 to 80% by mass, preferably 35 to 70% by mass, and more preferably 40 to 60% by mass.

The fact that the layer in the squeeze container is a regrind layer can be confirmed, for example, by optical microscopic observation of a slice prepared with a microtome, material analysis using a Fourier transform infrared spectrophotometer, or a combination of these. Specifically, in optical microscopic observation, materials with different refractive indices are observed to be dispersed like islands in a sea, and in material analysis using a Fourier transform infrared spectrophotometer, a spectrum based on the stretching vibration of OH groups characteristic of EVOH in addition to polyethylene is observed.

(Outer layer, inner layer)
The outer layer and the inner layer may contain an olefin-based resin. Examples of the olefin-based resin include polyethylene such as low-density polyethylene (LDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), linear low-density polyethylene (LLDPE), and linear very low-density polyethylene (LVLDPE), as well as polypropylene, ethylene-propylene copolymer, polybutene-1, ethylene-butene-1 copolymer, propylene-butene-1 copolymer, ethylene-propylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, and ion-crosslinked olefin copolymer (ionomer). These may be used alone or in combination of two or more. Among these, polyethylene is preferred from the viewpoint of higher adhesion to the oxygen barrier layer A and the oxygen barrier layer B, and low-density polyethylene (LDPE) is more preferred.

The material constituting the outer layer and the material constituting the inner layer may be the same or different. Furthermore, the outer layer and the inner layer may contain lubricants, modifiers, pigments, ultraviolet absorbers, etc., as necessary.

The ratio of the mass of the outer layer to the mass of the squeeze container is not particularly limited, but can be, for example, 5 to 30% by mass, and preferably 10 to 20% by mass. The ratio of the mass of the inner layer to the mass of the squeeze container is not particularly limited, but can be, for example, 10 to 40% by mass, and preferably 15 to 30% by mass.

(Virgin layer)
The squeeze container according to the present invention may contain a virgin layer as necessary. Examples of the virgin material contained in the virgin layer include the virgin material that may be contained in the regrind layer. When the squeeze container has a virgin layer, the ratio of the mass of the virgin layer to the mass of the squeeze container is not particularly limited, but may be, for example, 0.1 to 5 mass%.

(Method of manufacturing squeeze container)
The method for producing the squeeze container according to the present invention is not particularly limited, but may include, for example, a step of producing a tubular parison including, in this order from the outside, an oxygen barrier layer A, a regrind layer, and an oxygen barrier layer B, and a step of sandwiching the parison between dies to pinch off and fuse the parison, and blowing gas into the parison to mold it. Specifically, first, the materials of each layer constituting the tubular container are co-extruded using a multi-layer multiple die to produce a tubular parison. Next, the melt-extruded parison is fed into a die, and the parison is sandwiched between the dies from both sides to pinch off and fuse the parison. Next, compressed gas such as air is blown into the parison to expand it and mold it into the shape of a container. After that, it is cooled, and the die is opened to remove the molded product.

(Application)
The squeeze container according to the present invention can be used as a container for storing and preserving viscous foods such as wasabi, ginger, mustard, ketchup, mayonnaise, jam, and chocolate, toothpaste, cosmetics, etc. By using the squeeze container according to the present invention, it is possible to suppress the transfer of odors from the container itself to the contents. In addition, since the squeeze container according to the present invention has high squeezability, the contents can be easily pushed out to the outside.

The present invention will be described in more detail below with reference to examples, but the present invention is not limited to these examples. The flavor evaluation, dissolution evaluation, and rigidity evaluation of the bottles obtained in Example 1 and Comparative Example 1 were performed by the following methods.

[Flavor evaluation]
The bottles obtained in Example 1 and Comparative Example 1 were filled with 400 g of ultrapure water at 85° C., and the mouths were sealed with a sealant. After sterilization by inversion for 10 minutes, the bottles were cooled to room temperature in running water and stored for one week. The flavor of the ultrapure water (hereinafter also referred to as the test liquid) in the bottles after storage was evaluated by the following three-point discrimination and preference method.

(Three-point discrimination/preference method)
A discrimination test was conducted by a panel of 10 members using the test liquid of Example 1 and the test liquid of Comparative Example 1 by a three-point discrimination method. Specifically, a combination of three test liquids, two of the test liquids of Example 1 and one of the test liquids of Comparative Example 1, or a combination of three test liquids, two of the test liquids of Comparative Example 1 and one of the test liquids of Example 1, was presented to the panel, and a discrimination test in which each panel member had to guess only one different test liquid was conducted twice. The number of correct answers out of the total number of answers (20) is shown in Table 1.
In addition, as a preference test, the panelists who answered the discrimination test correctly were asked which of the discriminated test liquids they preferred. The results are shown in Table 1.

[Evaluation of dissolution]
The TOC (Total Organic Carbon) amount of the test liquid of Example 1 and the test liquid of Comparative Example 1 in the flavor evaluation was measured using a total organic carbon meter (product name: TOC-V CPH, manufactured by Shimadzu Corporation). The measurement was performed three times, and the average value was calculated. The results are shown in Table 1.

[Rigidity evaluation]
The bottles obtained in Example 1 and Comparative Example 1 were filled with 400 g of water and conditioned at 23° C. for 24 hours. Using a compression tester (Tensilon universal testing machine, product name: RTG-1310, manufactured by A&D Co., Ltd.), the bottles were compressed in the vertical direction (direction from the mouth of the bottle to the bottom) (20 mm/min, no V-notch) to measure the compressive strength. Measurements were performed on 24 bottles, and the average results are shown in Table 1.

[Example 1]
LDPE (product name: LB420M, manufactured by Nippon Polyethylene Co., Ltd.) was prepared as a material for the inner layer, outer layer, and virgin layer. A mixture containing 70 parts by mass of EVOH (product name: DC3203RB, manufactured by Nippon Synthetic Co., Ltd.), 20 parts by mass of LDPE (product name: LB420M, manufactured by Nippon Polyethylene Co., Ltd.), and 10 parts by mass of ionomer resin (product name: Himilan 1601, manufactured by Mitsui DuPont Polychemicals Co., Ltd.) as a compatibilizer was prepared as a material for the oxygen barrier layers A and B. A mixture of 60 parts by mass of LDPE (product name: LB420M, manufactured by Nippon Polyethylene Co., Ltd.) and 40 parts by mass of a mixture of reused layer materials (scrap resin) was prepared as a material for the regrind layer. The materials for the inner layer, outer layer, virgin layer, oxygen barrier layers A and B, and regrind layer were fed into three extruders, respectively, to extrude a multi-layer parison consisting of six layers: outer layer/oxygen barrier layer A/virgin layer/regrind layer/oxygen barrier layer B/inner layer. The multi-layer parison was then molded by direct blow molding to obtain a bottle, which was a squeeze container with a volume of 420 ml and a mass of 18 g.

The thickness of the thinnest part of the body of the bottle was 300 μm. The mass fraction of each layer was outer layer (15.0 mass%)/oxygen barrier layer A (3.3 mass%)/virgin layer (1.0 mass%)/regrind layer (52.4 mass%)/oxygen barrier layer B (3.3 mass%)/inner layer (25.0 mass%).

The bottles were subjected to the flavor evaluation, dissolution evaluation, and rigidity evaluation. The results are shown in Table 1.

[Comparative Example 1]
LDPE (product name: LB420M, manufactured by Nippon Polyethylene Co., Ltd.) was prepared as the material for the inner layer and the outer layer. EVOH (product name: DC3203RB, manufactured by Nippon Synthetic Co., Ltd.) was prepared as the material for the oxygen barrier layer. Modified polyolefin resin (product name: Modic L522, manufactured by Mitsubishi Chemical Co., Ltd.) was prepared as the material for the adhesive layer. A mixture of 60 parts by mass of LDPE (product name: LB420M, manufactured by Nippon Polyethylene Co., Ltd.) and 40 parts by mass of a mixture of reused materials of each layer (scrap resin) was prepared as the material for the regrind layer. Each material of the inner layer, outer layer, oxygen barrier layer, adhesive layer, and regrind layer was respectively put into four extruders, and a multilayer parison consisting of six layers of outer layer/adhesive layer/oxygen barrier layer/adhesive layer/regrind layer/inner layer was extruded. Next, the multilayer parison was molded by direct blow molding to obtain a bottle, which is a squeeze container with a volume of 420 ml and a mass of 18 g.

The thickness of the thinnest part of the body of the bottle was 300 μm. The mass fraction of each layer was outer layer (15.0 mass%)/adhesive layer (1.0 mass%)/oxygen barrier layer (2.4 mass%)/adhesive layer (1.0 mass%)/regrind layer (65.6 mass%)/inner layer (15.0 mass%).

The bottles were subjected to the flavor evaluation, dissolution evaluation, and rigidity evaluation. The results are shown in Table 1.

As shown in Table 1, in the flavor evaluation (three-point discrimination/preference method), Example 1 was significantly discriminated from Comparative Example 1, and it was confirmed that Example 1 was preferred over Comparative Example 1. Furthermore, many of the panelists who answered the discrimination test correctly commented that Example 1 had a weaker taste and smell of plastic, etc., compared to Comparative Example 1. In addition, in the elution evaluation, it was confirmed that Example 1 had a lower TOC amount than Comparative Example 1. From these evaluations, it is inferred that in Example 1, the migration of odorous components such as aldehydes and ketones contained in the regrind layer to the contents was partially blocked by the oxygen barrier layer B present between the regrind layer and the inner layer.

In addition, the rigidity evaluation confirmed that Example 1 had lower compressive strength and rigidity, i.e., higher squeezability, than Comparative Example 1. In Comparative Example 1, EVOH alone was used as the material for the oxygen barrier layer, whereas in Example 1, a mixture containing LDPE and a compatibilizer in addition to EVOH was used as the material for the oxygen barrier layers A and B. It is presumed that this caused the rigidity of the entire bottle to decrease in Example 1.
The present invention includes the following embodiments.
[1] A squeeze container including, in order from the outside, an oxygen barrier layer A, a regrind layer, and an oxygen barrier layer B,
The oxygen barrier layer A and the oxygen barrier layer B each contain an ethylene-vinyl alcohol copolymer, polyethylene, and a compatibilizer.
[2] The oxygen barrier layer A and the oxygen barrier layer B each contain an ethylene-vinyl alcohol copolymer and polyethylene in a mass ratio of 95:5 to 50:50, and further contain 1 to 49 parts by mass of a compatibilizer per 100 parts by mass of the total amount of the ethylene-vinyl alcohol copolymer and the polyethylene. [1] The squeeze container described in.
[3] The squeeze container according to [1] or [2], wherein the ratio of the total mass of the oxygen barrier layer A and the oxygen barrier layer B to the mass of the squeeze container is 1 to 30 mass%.
[4] The squeeze container according to any one of [1] to [3], wherein the mass ratio of the oxygen barrier layer B to the mass of the squeeze container is 0.5 to 15 mass%.
[5] The squeeze container according to any one of [1] to [4], wherein the thickness of the thinnest part of the body of the squeeze container is 180 to 1500 μm.
[6] The squeeze container according to any one of [1] to [5], wherein the squeeze container includes an outer layer, the oxygen barrier layer A, the regrind layer, the oxygen barrier layer B, and an inner layer in this order.

1 Mouth 2 Body 3 Bottom 4 Outer layer 5 Oxygen barrier layer A
6 Virgin layer 7 Regrind layer 8 Oxygen barrier layer B
9 Inner layer

Claims (5)

A squeeze container including, in order from the outside, an oxygen barrier layer A, a regrind layer, and an oxygen barrier layer B,
The oxygen barrier layer A and the oxygen barrier layer B each contain an ethylene-vinyl alcohol copolymer, polyethylene, and a compatibilizer,
The oxygen barrier layer A and the oxygen barrier layer B each contain an ethylene-vinyl alcohol copolymer and polyethylene in a mass ratio of 80:20 to 65:35, and further contain 4 parts by mass or more and less than 20 parts by mass of a compatibilizer per 100 parts by mass of the total amount of the ethylene-vinyl alcohol copolymer and the polyethylene. The squeeze container according to claim 1, wherein the ratio of the total mass of the oxygen barrier layer A and the oxygen barrier layer B to the mass of the squeeze container is 1 to 30 mass%. The squeeze container according to claim 1 or 2, wherein the mass ratio of the oxygen barrier layer B to the mass of the squeeze container is 0.5 to 15 mass%. The squeeze container according to any one of claims 1 to 3, wherein the thickness of the thinnest part of the body of the squeeze container is 180 to 1500 μm. The squeeze container according to any one of claims 1 to 4, wherein the squeeze container comprises an outer layer, the oxygen barrier layer A, the regrind layer, the oxygen barrier layer B, and an inner layer in this order.

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