KR102646739B1 - Barrier resin having a multilayer structure and a method of manufacturing the same - Google Patents

Abstract

The present invention relates to a technology that includes a multilayer structure with a resin used in the production of barrier products, has excellent oxygen barrier properties, improves processability, and enables manufacturing at a low cost. In addition, the barrier resin having a multilayer structure according to the present invention is provided as a melt blend resin obtained by extruding polyolefin, barrier resin, and compatibilizer by adjusting the volume ratio, viscosity ratio, etc. do.
The barrier resin having a multilayer structure according to the present invention has excellent oxygen barrier properties and has improved processability, thereby providing a resin that can be manufactured at a low cost.

Description

Barrier resin having a multilayer structure and method for manufacturing the same {BARRIER RESIN HAVING A MULTILAYER STRUCTURE AND A METHOD OF MANUFACTURING THE SAME}

The present invention relates to a technology that includes a multilayer structure with a resin used in the production of barrier products, has excellent oxygen barrier properties, improves processability, and can be manufactured at a low cost. The barrier resin having a multilayer structure according to the present invention is provided as a melt blend resin by adjusting the volume ratio, viscosity ratio, etc. of polyolefin, barrier resin, and compatibilizer.

Ethylene Vinyl Alcohol (EVOH), one of the representative barrier resins, is a copolymer of ethylene and vinyl alcohol and has excellent processability and has a hydroxy (-OH) group in the molecule. It exists and has strong hydrogen bonding between molecules, so oxygen permeability is very low. In general, the oxygen permeability of polyethylene is 60,000 cc/m ² .day or more, and the oxygen permeability of ethylene vinyl alcohol is 0.1 to 80 cc/m ² .day. In addition, ethylene vinyl alcohol (EVOH) is a more expensive product than polyvinylidenechlolide (PVdC), but is leading the barrier resin market with the advantages of being cheaper than transparent deposition barrier products, excellent processability, and being recyclable. However, ethylene vinyl alcohol (EVOH) has weakened hydrogen bonds in the presence of moisture, which further weakens its oxygen barrier properties and increases moisture permeability, so the industry uses polyethylene (PE) and multilayer films with low moisture permeability. The structure of the multilayer film is provided as a 5-layer structure, and more specifically, it is provided as a structure of polyethylene (PE)/adhesive resin/ethylene vinyl alcohol layer (EVOH)/adhesive resin/polyethylene (PE), and the ethylene vinyl The EVOH molecular structure included in the alcohol layer (EVOH) is shown in Chemical Formula 1.

[Formula 1]

The five-layer structure film generally includes a polyethylene layer as the inner and outer layers, an ethylene vinyl alcohol layer as a middle layer, and may include an adhesive layer containing an adhesive resin on both sides of the middle layer. Accordingly, moisture, odors, etc. can be blocked in the inner and outer layers, and oxygen, carbon dioxide, freshness, etc. can be blocked in the middle layer. That is, in a multilayer film containing a polyethylene (PE) layer and an ethylene vinyl alcohol (EVOH) layer, the polyethylene layer functions as a moisture barrier layer, and the ethylene vinyl alcohol layer functions as an oxygen barrier layer. At this time, due to the nature of EVOH and multilayer process, it is a high-cost process structure, so improvement is necessary, and this can be solved by applying a barrier resin with a multilayer structure. A barrier resin with a multilayer structure has excellent oxygen and moisture barrier properties while improving processability.

On the other hand, when manufactured as a multilayer film with a multilayer structure, it shows superior gas barrier properties compared to the existing miscible blend resin monolayer film. In this case, even if the same material and the same content of resin are used, the series model (multilayer structure) ) and miscible blend model (matrix/domain structure), there is a difference in the transmittance trend. For example, when the permeability of material A is 1 and the permeability of material B is 0.01, the transmittance of the series model always tends to be lower than that of the miscible blend model. Here, you can see that the miscible blend model has a matrix/domain structure and the series model has a layer structure. The miscible blend model transmittance follows Equation 1 below, and the transmittance of the series model follows Equation 2.

Ultimately, even if processed using the same material and resin content, the transmittance changes depending on the difference in morphology and also changes depending on the layer thickness. Therefore, in the present invention, the film is processed with a blend resin to control the transmittance. It was completed after research to create a product with a layer structure in the morphology of the poetry film.

Korean Patent No. 10-1002050 (2007.11.29)

The present invention aims to solve all of the above-mentioned problems.

The purpose of the present invention is to provide a resin that has excellent oxygen barrier properties and has improved processability and can be manufactured at a low cost.

In order to achieve the object of the present invention as described above and realize the characteristic effects of the present invention described later, the characteristic configuration of the present invention is as follows.

According to the present invention, a polyolefin resin continuous phase (matrix) includes a barrier resin, and the barrier resin has a multilayer structure comprising at least one selected from a continuous phase (matrix) and a dispersed phase (domain). Resin is provided.

In particular, the polyolefin resin continuous phase (matrix) includes a barrier resin in the same ratio, and is characterized in that it has a layer morphology. In particular, the barrier resin may be present in the same ratio in the polyolefin resin continuous matrix, and in this case, the influence of permeability according to morphology can be efficiently provided.

According to the present invention, a barrier article comprising a barrier resin having the above-mentioned multilayer structure and polyolefin is provided.

According to the present invention, based on 100 parts by weight of polyolefin continuous phase (matrix) resin, it contains 30 to 250 parts by weight of a barrier resin and 0.5 to 30 parts by weight of a compatibilizer, and has a multilayer structure manufactured by a melt blending method. A method for producing a barrier resin is provided.

The barrier resin having a multilayer structure according to the present invention has excellent oxygen barrier properties and has improved processability, thereby providing a resin that can be manufactured at a low cost.

In particular, by providing the resin according to the present invention, when manufacturing a film containing a resin, the existing multilayer film with a five-layer structure can be provided as a multilayer film or monolayer film with a three-layer structure without an adhesive layer, thereby significantly improving processability. there is.

Figure 1 shows a resin containing a barrier resin dispersed phase (domain) in a polyolefin resin continuous phase (matrix).
Figure 2 shows a resin included as a continuous phase (matrix) or dispersed phase (domain) in a polyolefin resin continuous phase (matrix) in the form of a layer.

The detailed description of the present invention described below refers to the accompanying drawings, which show by way of example specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that the various embodiments of the invention are different from one another but are not necessarily mutually exclusive. For example, specific shapes, structures and characteristics described herein with respect to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention. Additionally, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the detailed description that follows is not intended to be taken in a limiting sense, and the scope of the invention is limited only by the appended claims, together with all equivalents to what those claims assert, if properly described. Similar reference numbers in the drawings refer to identical or similar functions across various aspects.

Hereinafter, in order to enable those skilled in the art to easily practice the present invention, preferred embodiments of the present invention will be described in detail with reference to the attached drawings.

According to one embodiment of the present invention, a polyolefin resin continuous phase (matrix) includes a barrier resin, and the barrier resin is a multilayer structure including at least one selected from a continuous phase (matrix) and a dispersed phase (domain). A barrier resin having a is provided.

According to one embodiment of the present invention, a barrier resin dispersed phase (domain) may be included in the polyolefin resin continuous phase (matrix). This is shown in Figure 1. Looking at Figure 1, a dispersed phase (domain) may exist in the polyolefin resin continuous phase (matrix), and the dispersed phase is also expressed as a droplet or disk.

According to one embodiment of the present invention, the barrier resin may include a continuous phase (matrix) or a dispersed phase (domain) in the polyolefin resin continuous phase (matrix). This is shown in Figure 2. Referring to Figure 2, the polyolefin resin continuous phase (matrix) contains a barrier resin as a continuous phase (matrix) or dispersed phase (domain) and is provided in the form of a layer. More specifically, when the polyolefin resin continuous phase (matrix) contains the barrier resin at the same ratio, the barrier resin continuous phase (matrix) may be provided in the form of a layer. In addition, when the barrier resin is included in a smaller proportion compared to the polyolefin resin continuous phase (matrix), the barrier resin may be provided in the form of a dispersed (domain) layer.

According to one embodiment of the present invention, the polyolefin resin continuous phase (matrix) includes a barrier resin in the same ratio and has a layer morphology. Preferably, the polyolefin resin continuous phase (matrix) includes the barrier resin continuous phase (matrix) in the same ratio and can be provided in the form of a layer. When the polyolefin resin and the barrier resin are present in the same ratio as in the present invention, the effect of permeability according to the morphology pursued by the present invention can be efficiently provided.

According to one embodiment of the present invention, the layer morphology has 1 to 100 layers per unit area of 400 ㎛ ² , the individual layer thickness is 0.001 to 2.5 ㎛, and the major axis length of the layer is 25 ㎛ or more. It is characterized by being distributed in the form of layers with an average aspect ratio (ϕn) of 10 or more. In particular, the individual thickness of the layer affects the morphology, which is a factor that affects the control of permeability, and when provided at the above thickness, the resin of the present invention can provide an improved oxygen barrier effect.

According to one embodiment of the present invention, when the polyolefin resin continuous phase (matrix) includes a continuous phase (matrix) or dispersed phase (domain) of the barrier resin, the volume ratio of the polyolefin resin continuous phase and the barrier resin ) Values range from 30:70 to 70:30. Preferably a range of 50:50 may be provided. Within the above range, oxygen barrier properties are excellent, processability is improved, and manufacturing is possible at a low cost.

According to one embodiment of the present invention, the viscosity ratio of the dispersed phase (domain)/continuous phase (matrix) in the barrier resin having the multilayer structure is provided in the range of 1.E-5 to 3.5. If the viscosity ratio is close to 1.E-6 or exceeds 3.5 due to a large difference in viscosity during blending, the mixing effect will be reduced even if a large shear is applied during processing. Therefore, when selecting a blend resin, This indicates that the viscosity ratio is important when blending. Therefore, in the case of the present invention, by providing the above range, a desirable viscosity ratio can be provided when blending.

According to one embodiment of the present invention, the polyolefin resin is high density polyethylene (HDPE, High Density Polyethylene), low density polyethylene (LDPE, Low Density Polyethylene), medium density polyethylene (MDPE, Medium Density Polyethylene), linear low density polyethylene (LLDPE, It is characterized by containing at least one selected from the group of linear low density polyethylene, ethylene-propylene copolymer, metallocene polyethylene, and polypropylene. Polyolefin resin is the most common plastic and is commonly used because it has excellent moldability and impact resistance, is easy to handle, and is inexpensive. However, in order to compensate for the high permeability of gases including oxygen, the present invention includes a barrier resin. By providing it together, oxygen barrier properties can be improved.

The barrier resin included to improve oxygen barrier properties is characterized by including at least one selected from the group of polyamide, polyvinyl alcohol, and ethylene-vinyl alcohol copolymer. In this case, the ethylene-vinyl alcohol copolymer contains 10 to 50 mol% of ethylene content. If the ethylene content is less than 10 mol%, the oxygen barrier property increases, but processing is difficult, and if the ethylene content exceeds 50 mol%, the oxygen barrier property decreases.

The barrier resin of the present invention includes at least one selected from the group of polyamide, polyvinyl alcohol, and ethylene-vinyl alcohol copolymer, and the polyamide is nylon 4.6, nylon 6, nylon 6.6, nylon 6.10, and nylon 7. , nylon 8, nylon 9, nylon 11, nylon 12, nylon 46, metaxylenediamine (MXD6), and amorphous polyamide, to block oxygen without deteriorating the intrinsic properties of polyolefin. Performance can be improved.

According to one embodiment of the present invention, a barrier resin having a multilayer structure is provided, which further includes a compatibilizer. In the case of a compatibilizer, when mixing polymers, it can improve the disadvantage of lowering physical properties such as strength, tensile, and elongation by providing compatibility to the bonds between polymer resins.

In this case, the compatibilizer contains 0.5 to 30 parts by weight based on 100 parts by weight of the barrier resin having the multilayer structure. If the amount is less than 0.5 parts by weight, it is difficult to expect an effect of improving compatibility, and if it exceeds 30 parts by weight, it is disadvantageous in terms of cost. Therefore, by providing the above range, excellent processing fluidity and molding processing can be provided, thereby providing a desirable commercialization effect.

The compatibilizer is ethylene-ethylene anhydride-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-alkyl acrylate-acrylic acid copolymer, maleic anhydride modified (grafted) high density polyethylene, maleic anhydride modified (grafted) linear low density polyethylene. At least one selected from polyethylene, ethylene-alkyl methacrylate-methacrylic acid copolymer, ethylene-butylacrylate copolymer, ethylene-vinylacetate copolymer, and maleic anhydride modified (grafted) ethylene-vinyl acetate copolymer. Includes.

According to one embodiment of the present invention, the melt index (MI ASTM D1238, 190°C) of the barrier resin having the multilayer structure may be provided as 0.1 to 40 g/10 min. Additionally, it may be provided with a weight average molecular weight of 30,000 to 250,000, preferably 50,000 to 200,000.

According to one embodiment of the present invention, a barrier article comprising a barrier resin having a multilayer structure and polyolefin is provided. In this case, the blocking article is characterized in that it is at least one selected from multilayer films, sheets, packaging paper, pipes, pouches, interior materials, and containers.

On the other hand, a barrier resin having a multilayer structure manufactured by a melt blending method, comprising 30 to 250 parts by weight of a barrier resin and 0.5 to 30 parts by weight of a compatibilizer, based on 100 parts by weight of polyolefin continuous phase (matrix) resin. A manufacturing method is provided. The melt blending method refers to creating a new material by melting the polymer materials to be blended by applying heat above the melting temperature and then having a certain morphology by mechanical force. In the case of the present invention, polyolefin resin and blocking It can be compressed after melting at a melting temperature of 100°C to 300°C, preferably 150°C to 230°C, of the EVOH resin.

The volume ratio between the polyolefin resin continuous phase and the barrier resin is 30:70 to 70:30. In addition, in the barrier resin having the multilayer structure, the dispersed phase (domain)/continuous phase (matrix) viscosity ratio is provided in the range of 1.E-5 to 3.5. The numerical range is the same as described above.

The melt blending is characterized by using at least one selected from an extruder, a kneader, a Brabender Plsaticorder, a mixing roll, and a mixer. In the case of the extruder, a melt extruder is preferably provided, and the process can be performed by optimizing process conditions depending on the various raw materials input in the melt process. In the melting process, the melting temperature may be 100°C to 300°C, and preferably 150°C to 230°C. At this time, the melt flow index ranges from 0.1 to 40, the analysis method is Melt Index, and the unit is provided as g/10min.

In addition, as an example of the extruder, single-screw, twin-screw and multi-screw extruders may be provided, preferably a twin-screw extruder, and in this case, excellent kneading properties are achieved.

Furthermore, the barrier resin having the multilayer structure according to the present invention may be supplemented with a heat stabilizer, UV stabilizer, UV blocker, lubricant, mold release agent, coupling agent, etc. as needed, but is not limited thereto.

According to one embodiment of the present invention, a barrier article containing a barrier resin having a multilayer structure manufactured by the above manufacturing method is provided. In this case, the blocking article may be at least one selected from multilayer films, sheets, packaging, pipes, pouches, interior materials, and containers. For example, in the case of a multilayer film, a polyolefin layer may be provided on both sides of the multilayer resin layer, and in this case, it may be manufactured using a multilayer extruder.

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and should not be construed as limiting the present invention in any way.

Any information not described here can be technically inferred by anyone skilled in the art, so description thereof will be omitted.

<Manufacturing example>

Preparation Example 1: Preparation of resin

A blended resin containing 50% LLDPE of 1 MI (Melt Index), 50% EVOH-44% (EVOH ethylene contents), 1 phr compatibilizer, and a Viscosity Ratio of 0.5 was manufactured using a twin-screw extruder.

To manufacture the blend resin, a twin screw extruder (27mmΦ) from Leistritz was used, and the processing temperature C1/C2/C3/C4/C5/C6/C7/C8/C9/A= 65/170/ It was manufactured under the standard conditions of 180/190/200/200/210/210/210/200℃, screw speed 200~250 rpm, and feeding 8~9kg/h.

Preparation Example 2: Preparation of resin

It contained 50% of 1 MI LLDPE, 50% of EVOH-29%, and 1 phr of compatibilizer, and was prepared in the same manner as Preparation Example 1, except that the Viscosity Ratio was 1.1.

Preparation Example 3: Preparation of resin

It contained 55% of 1 MI LLDPE, 45% of EVOH-29%, and 1 phr of compatibilizer, and was prepared in the same manner as Preparation Example 1, except that the Viscosity Ratio was 1.1.

Preparation Example 4: Preparation of resin

It was prepared in the same manner as in Preparation Example 1, except that it contained 70% of 1 MI LLDPE, 30% of EVOH-44%, and 1 phr of compatibilizer, and the Viscosity Ratio was 0.5.

Preparation Example 5: Preparation of resin

It was prepared in the same manner as Preparation Example 1, except that it contained 50% of 3 MI LLDPE, 50% of EVOH-29%, and 1 phr of compatibilizer, and the Viscosity Ratio was 2.7.

Preparation Example 6: Preparation of resin

A resin containing 50% of 1 MI LLDPE, 50% of EVOH-29%, 1 phr of compatibilizer, and having a Viscosity Ratio of 2.7 was blended and manufactured using a Banbury Kneader.

<Example>

Example 1: Preparation of barrier film

Using the resin according to Preparation Example 1, a layer blown barrier film was manufactured. In this case, the 3-layer blown film extruder is Killon's 3-layer blown film extruder (inner and outer layer 30mmΦ, middle layer 45mmΦ screw, 75mmΦ die), inner and outer layers C1/C2/C3/C4/A = 170/180/210. /220/220℃ screw speed 50rpm, middle layer C1/C2/C3/C4/A/D1/D2/D3 =170/180/190/210/210/220/220/200℃ screw speed 10rpm, BUR 2, A 100 μm thick film was prepared.

Example 2: Preparation of barrier film

It was prepared in the same manner as in Example 1, except that the resin according to Preparation Example 1 was used.

Example 3: Preparation of barrier film

It was prepared in the same manner as Example 1, except that the resin according to Preparation Example 3 was used.

Comparative Example 1: Preparation of barrier film

It was prepared in the same manner as Example 1, except that the resin according to Preparation Example 4 was used.

Comparative Example 2: Preparation of barrier film

It was prepared in the same manner as Example 1, except that the resin according to Preparation Example 5 was used.

Comparative Example 3: Preparation of barrier film

It was prepared in the same manner as Example 1, except that the resin according to Preparation Example 6 was used.

<Experimental example>

Experimental example: Oxygen permeability measurement

The oxygen permeability of the films according to Examples 1 to 3 and Comparative Examples 1 to 3 was measured. Measurement conditions are 23.0°C and 65% RH. For the measuring device, Mocon's oxygen permeability meter OX-TRAN 2/22L was used. When measuring oxygen permeability, the test gas was oxygen, the carrier gas was a mixed gas (nitrogen + hydrogen), and the temperature was 20 to 23°C and the relative humidity was 0 to 65%.

Blend composition and manufacturing method oxygen permeability
(cc/m².day) Example 1 1MI LLDPE 50%, EVOH-44% 50%, compatibilizer 1phr, Viscosity Ratio 0.5 2.8 Example 2 1MI LLDPE 50%, EVOH-29% 50%, compatibilizer 1phr, Viscosity Ratio 1.1 1.1 Example 3 1MI LLDPE 55%, EVOH-29% 45%, compatibilizer 1phr, Viscosity Ratio 1.1 0.9 Comparative Example 1 1MI LLDPE 70%, EVOH-44% 30%, compatibilizer 1phr, Viscosity Ratio 0.5 14.2 Comparative example 2 3MI LLDPE 50%, EVOH-29% 50%, compatibilizer 1phr, Viscosity Ratio 2.7 131.8 Comparative Example 3 1MI LLDPE 55%, EVOH-29% 45%, compatibilizer 1phr, Viscosity Ratio 1.1
※ Blend manufactured using Banbury Kneader 120.1

As shown in Table 1, when the barrier resin according to the present invention is included, it can be confirmed that oxygen barrier is very excellent in light of the fact that the oxygen permeability value is significantly low.

Therefore, the barrier resin having a multilayer structure according to the present invention can be manufactured at low cost by adjusting the volume ratio, viscosity ratio, etc. by melt blending method, and the processability is improved. It provides the effect of facilitating application in the processing field.

In particular, by providing the resin according to the present invention, when manufacturing a film containing a resin, the existing multilayer film with a five-layer structure can be provided as a multilayer film or monolayer film with a three-layer structure without an adhesive layer, thereby significantly improving processability. .

In the above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to facilitate a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , a person skilled in the art to which the present invention pertains can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the above-described embodiments, and the scope of the patent claims described below as well as all modifications equivalent to or equivalent to the scope of the claims fall within the scope of the spirit of the present invention. They will say they do it.

Claims (19)

In the polyolefin resin continuous phase (matrix)
Contains a barrier resin having a layer morphology,
The barrier resin includes at least one selected from a continuous phase (matrix) and a dispersed phase (domain),
The layer of the layer morphology has 1 to 100 layers per unit area of ^400㎛2 , the individual layer thickness is 0.001 to 2.5㎛, the major axis length of the layer is 25㎛ or more, and the average aspect ratio (ϕn) is 10 or more. distributed in the form of
A barrier resin having a multilayer structure, wherein the viscosity ratio of the dispersed phase (domain)/continuous phase (matrix) is in the range of 1.1 to 3.5.
According to paragraph 1,
A barrier resin having a multilayer structure, characterized in that the barrier resin is contained in the same ratio in the polyolefin resin continuous phase (matrix). delete According to paragraph 1,
A barrier resin having a multilayer structure in which the volume ratio of the polyolefin resin continuous phase (matrix) and the barrier resin is in the range of 30:70 to 70:30. delete According to paragraph 1,
The polyolefin resin is a barrier resin having a multilayer structure comprising at least one selected from the group of high-density polyethylene, low-density polyethylene, medium-density polyethylene, linear low-density polyethylene, ethylene-propylene copolymer, metallocene polyethylene, and polypropylene. According to paragraph 1,
The barrier resin has a multilayer structure containing at least one selected from the group of polyamide, polyvinyl alcohol, and ethylene-vinyl alcohol copolymer. In clause 7,
The ethylene-vinyl alcohol copolymer is a barrier resin having a multilayer structure containing 10 to 50 mol% of ethylene content. In clause 7,
The polyamide is at least one selected from nylon 4.6, nylon 6, nylon 6.6, nylon 6.10, nylon 7, nylon 8, nylon 9, nylon 11, nylon 12, nylon 46, metaxylenediamine (MXD6), and amorphous polyamide. A barrier resin having a multilayer structure containing more than one layer. According to paragraph 1,
The resin is a barrier resin having a multilayer structure further containing a compatibilizer. According to clause 10,
A barrier resin having a multilayer structure containing 0.5 to 30 parts by weight of a compatibilizer based on 100 parts by weight of the barrier resin having a multilayer structure. According to clause 10,
The compatibilizer is ethylene-ethylene anhydride-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-alkyl acrylate-acrylic acid copolymer, maleic anhydride modified (grafted) high density polyethylene, maleic anhydride modified (grafted) linear low density polyethylene. At least one selected from polyethylene, ethylene-alkyl methacrylate-methacrylic acid copolymer, ethylene-butylacrylate copolymer, ethylene-vinylacetate copolymer, and maleic anhydride modified (grafted) ethylene-vinyl acetate copolymer. A barrier resin having a multilayer structure comprising: A barrier article comprising a barrier resin and polyolefin having a multilayer structure according to any one of claims 1, 2, 4, and 6 to 12. According to clause 13,
The barrier product is characterized in that it is at least one selected from multilayer films, sheets, packaging paper, pipes, pouches, interior materials, and containers. Manufacture of a barrier resin having a multilayer structure prepared by a melt blending method, comprising 30 to 250 parts by weight of a barrier resin and 0.5 to 30 parts by weight of a compatibilizer, based on 100 parts by weight of polyolefin continuous phase (matrix) resin. It is a method,
The barrier resin having the multilayer structure,
In the polyolefin resin continuous phase (matrix)
Contains a barrier resin having a layer morphology,
The barrier resin includes at least one selected from a continuous phase (matrix) and a dispersed phase (domain),
The layer of the layer morphology has 1 to 100 layers per unit area of ^400㎛2 , the individual layer thickness is 0.001 to 2.5㎛, the major axis length of the layer is 25㎛ or more, and the average aspect ratio (ϕn) is 10 or more. distributed in the form of
A method for producing a barrier resin having a multilayer structure, wherein the viscosity ratio of the dispersed phase (domain)/continuous phase (matrix) is in the range of 1.1 to 3.5.
According to clause 15,
A method for producing a barrier resin having a multilayer structure wherein the volume ratio of the polyolefin resin continuous phase and the barrier resin is 30:70 to 70:30. delete According to clause 15,
The melt blending is a barrier resin having a multilayer structure, characterized in that it uses at least one selected from the group consisting of an extruder, a kneader, a Brabender Plsaticorder, a mixing roll, and a mixer. Manufacturing method. According to clause 18,
A method for producing a barrier resin having a multilayer structure, characterized in that the extruder is a twin screw extruder.