JPH11139419A - Laminated container using recycled polyester terephthalate ethylene resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a production problem owing to moldability deterioration and also to secure enough hygiene and safety of a produced molded item while using a recycled article from the viewpoint of environmental protection as to a laminated container using recycled polyester terephthalate ethylene resin. SOLUTION: A laminated container 51 using recycled polyester terephthalate ethylene resin is molded following an extrusion blow molding method to be structured in three layers, i.e., a recycled resin layer 52 made of recycled polyester terephthalate ethylene resin and polyester terephthalate ethylene resin layers 53, 54 not recycled and provided on the inside and on the outside of the recycled resin layer 52.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin container such as a bottle which can be filled with cosmetics and the like, and particularly to a cosmetic and the like using a recycled polyterephthalate ethylene resin which is regenerated from wastes in consideration of environmental problems. The present invention relates to a fillable resin container.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of protection of the global environment, it has been desired to expand the use of recycled resins in the production of products using resins. As for recycled resins obtained from resin containers and the like collected from the market, polyethylene resins, polyterephthalic acid ethylene resins and the like are currently available for industrial use.

[0003] Polyethylene resin is a translucent or nearly transparent translucent thermoplastic resin, resistant to acids and alkalis,
It is insoluble in ordinary organic solvents, but is soluble in hydrocarbons and organic chlorine compounds at high temperatures. That is, there is some concern about oil resistance. Further, among the synthetic resins, the specific gravity is small, the mechanical strength is relatively large, and the workability is excellent. It has low water permeability and is widely used in daily necessities, stationery, containers, bottles, containers, electrical equipment parts, and the like.

[0004] Next, ethylene polyterephthalate resin is
It is a thermoplastic resin that is insoluble in ordinary organic solvents, has acid resistance, and is generally fixed as a raw material for fibers, films, and molded plastics. Recently, due to its properties such as high resistance to organic solvents and transparency, it is a material that is rapidly spreading in the technical field as a raw material for liquid containers such as beverages and cosmetics.

[0005] As described above, polyethylene resin and polyethylene terephthalate resin are excellent resins, and recycled products thereof are strongly desired to be used in various fields. And the demand for expanded use of such reclaimed products is that the contents are applied to the human body, safety is required and expensive cosmetics, and for containers, along with reliability such as hygiene, oil resistance and strength, In the field of cosmetic containers, which have strict requirements from the viewpoint of design, the use of recycled products in cosmetic containers is also desired to be expanded.

However, it is known that there are some problems with the use of resin by regeneration. In general, the quality of a recycled resin is lower than that of a newly produced original resin without being recycled, and it is often difficult to maintain the inherent properties of the resin by using only the recycled resin.

Such properties naturally apply to polyethylene resins and polyterephthalate ethylene resins. For example, in a molded article such as a container using a recycled polyethylene resin, it is difficult to generate a crack when a stress is applied, that is, a decrease in stress crack resistance is observed. If this is used for bottles and containers to fill liquid contents such as beverages and cosmetics, especially when used for caps, after touching the liquid contents and getting wet,
Cracks tend to occur in the body of the cap by applying stress due to the fitting in the state as it is.

[0008] Therefore, in order to avoid such problems and to increase the amount of recycled products even slightly, recycled polyethylene resin is used for a part of the container and other types of resin are used for the other part. Studies have been made to cover the property deterioration of the recycled polyethylene resin by using the resin. In other words, studies have been made to adopt a configuration in which the container is formed in a laminated structure, the recycled polyethylene resin is used for the intermediate layer, and the protective layer is provided on the upper layer and / or the lower layer of the intermediate layer made of the recycled polyethylene resin.

For example, it is known that a recycled polyethylene resin is used for an intermediate layer, and a layer of a new polyethylene resin which is not regenerated by one layer is provided above and below to form a three-layer container. By adopting such a structure, the above problem is certainly reduced. As a result, expanded use of recycled polyethylene resin is possible for some applications.

However, as a matter of course, the characteristics as a polyethylene resin are provided as they are, and the conventional disadvantages have not been improved. Therefore, the transparency of the obtained container is inferior, and it is difficult to expand its use for applications such as cosmetic containers in which the transparency is strictly required from the viewpoint of design.

[0011] At the same time, concerns regarding oil resistance still remain, which is not suitable for filling oily contents. In this case, the use of a polyethylene vinyl alcohol copolymer having excellent oil resistance for the protective layer to manufacture a laminated container is being studied, but the use of a different kind of resin material is disadvantageous for subsequent recyclability. It is not preferable because it causes a problem.

Therefore, there are many difficulties in expanding the use of recycled polyethylene resins in cosmetics applications where high transparency and oil resistance are required. For cosmetic container applications, the use of recycled ethylene terephthalate resin originally having high transparency and oil resistance is expected to increase.

[0013]

Therefore, when a molded article such as a container is manufactured by using a regenerated poly (ethylene terephthalate) resin, it is an issue how to cover the deterioration of the property. When manufacturing molded articles such as containers using recycled polyterephthalate ethylene resin, the first problem is that
That is the difficulty of molding.

Polyethylene ethylene terephthalate resin generally has high crystallinity and a high molding temperature, and thus has the property that moldability is not good. This drawback in terms of formability is further promoted by using recycled products. That is,
Polyethylene terephthalate resin is often molded in accordance with the injection blow molding method. At this time, if molding is carried out using only recycled polyterephthalate ethylene resin, the moldability and the physical properties of the resulting molded articles such as containers are reduced. Will drop.

With respect to such a problem, it has been studied to add a regenerated poly (terephthalate) -ethylene resin to a new poly (ethylene-terephthalate) -based resin which is not based on regeneration and to blend the same, thereby covering a reduction in moldability which is a problem in the process of molding a container or the like. It has been done. In this case, a certain improvement effect has been observed with respect to a reduction in moldability due to the recycled product.

The next problem is a particular problem of a recycled ethylene terephthalate resin which is a recycled product, and such a problem is caused by blending with a novel ethylene terephthalate resin which does not depend on regeneration. It has not been improved and remains a major problem. In other words, because it is a recycled product, there is a concern that the recycled polyethylene terephthalate resin may contain impurities and foreign substances, and the recycled polyethylene terephthalate resin directly touches the cosmetics, which are the contents from the viewpoint of hygiene and safety. Is not preferred.

Therefore, it has high transparency and oil resistance not found in polyethylene resin, and is expected to expand its use as a container for cosmetics and the like. At present, its use is directly applied to the human body such as detergents. The use of containers for filling contents that do not occur is limited. As described above, an object of the present invention is to provide a laminated container using a novel regenerated poly (ethylene terephthalate) resin which has solved the above-mentioned problems.

Furthermore, it is possible to avoid the production problems caused by the deterioration of moldability while using recycled products from the viewpoint of environmental protection, and to further ensure hygiene and safety in the manufactured molded products. An object of the present invention is to provide a laminated container using a regenerated poly (ethylene terephthalate) ethylene resin.

[0019]

According to the first aspect of the present invention,
It has a laminated structure composed of a recycled resin layer made of a recycled polyterephthalate ethylene resin, and a layer of a polystyrene ethylene terephthalate resin that is not based on regeneration and is disposed at least inside of the inside and outside of the recycled resin layer. Features.

According to a second aspect of the present invention, there is provided a laminated container using the recycled poly (ethylene terephthalate) resin according to the first aspect, which is formed by an extrusion blow molding method or an injection blow molding method. According to a third aspect of the present invention, there is provided a laminated container using the reclaimed ethylene polyterephthalate resin according to the first aspect, which is molded according to an extrusion blow molding method. It is a modified polyterephthalate ethylene resin having physical properties of not less than 10,000 and not less than 10,000 CPS with a melt viscosity at a shear angular velocity of 0.1 rad / sec.

According to the first aspect of the present invention, the container is constituted by using the regenerated poly (ethylene terephthalate) resin, and the regenerated poly (ethylene terephthalate) resin is used while securing the use of the regenerated poly (ethylene terephthalate) resin. A layer of a novel poly (ethylene terephthalate) resin which does not rely on regeneration to protect the layer is disposed on the inner side of the regenerated poly (ethylene terephthalate) resin layer, or on both the inner side and the outer side.

Therefore, the contents to be filled in the container do not come into direct contact with the regenerated poly (ethylene terephthalate) resin, and the problem of hygiene and safety is avoided. Therefore, it is possible to provide a laminated container using a recycled polyethylene terephthalate ethylene resin capable of sufficiently ensuring hygiene and safety in a manufactured molded product while using a recycled product from the viewpoint of environmental protection. It becomes possible.

According to the second aspect of the present invention, the obtained container is constituted by using a regenerated poly (ethylene terephthalate) resin. A novel non-recycled layer of poly (ethylene terephthalate) resin that protects the layer of poly (ethylene terephthalate) resin is disposed on the inside of the recycled layer of poly (ethylene terephthalate) resin, or on both inside and outside of the layer.

Therefore, when a container is manufactured by injection blow molding or extrusion blow molding, the performance of the container is reduced because it is a recycled product. The novel layer of poly (ethylene terephthalate) resin which does not rely on regeneration makes it possible to integrally mold from inside or from both inside and outside.

Therefore, the resulting container covers the reduction in moldability due to the recycled ethylene polyterephthalate resin,
Has mass productivity. As described above, while using recycled products from the viewpoint of environmental protection, it is necessary to avoid manufacturing problems due to deterioration in moldability of recycled products, and to further ensure hygiene and safety in manufactured molded products. It is possible to provide a laminated container using a recycled polyterephthalic acid ethylene resin that can be used.

According to the third aspect of the invention, a modified poly (ethylene terephthalate) resin having an intrinsic viscosity of 0.8 or more and a melt viscosity of 10,000 CPS or more at a shear angular velocity of 0.1 radian / sec. It can be manufactured by disposing it on the inside or on both inside and outside of the layer of the regenerated poly (ethylene terephthalate) resin having a reduced level and integrally molding by extrusion blow molding.

Therefore, at the time of molding, the support from the inside of the layer of the regenerated poly (ethylene terephthalate) resin by the layer of the novel poly (ethylene terephthalate) resin, which is not based on the regeneration, or from both the inside and the outside becomes sufficiently strong. Thus, it is possible to efficiently and integrally mold. Therefore, it is possible to provide a laminated container using a recycled ethylene polyterephthalate resin capable of avoiding a production problem due to a decrease in moldability of the recycled product while using the recycled product from the viewpoint of environmental protection. It becomes possible.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a laminated container using a recycled ethylene terephthalate resin having a two-layer structure of the present invention, and FIG. 2 is a laminated container using a recycled ethylene terephthalate resin having a three-layer structure of the present invention. It is a longitudinal section of a container.

The laminated container 1 of the present invention using the regenerated poly (ethylene terephthalate) resin having a two-layer structure has a regenerated resin layer 2 made of regenerated poly (ethylene terephthalate) resin and a recycle resin disposed inside the regenerated resin layer 2. And a layer structure of an ethylene polyterephthalate resin layer 3 independent of the above. The laminated container 11 using the recycled ethylene polyterephthalate resin having a three-layer structure of the present invention is disposed on the recycled resin layer 12 made of the recycled ethylene polyterephthalate resin, and inside and outside the recycled resin layer 12. It has a laminated structure composed of layers 13 and 14 of poly (ethylene terephthalate) resin not depending on regeneration.

The laminated containers using the recycled ethylene polyterephthalate resin of the present invention as described above all use the recycled ethylene resin polyterephthalate, which can contribute to the expansion of use of the recycled resin. Further, the contents filled in the laminated containers 1 and 11 using the recycled ethylene polyterephthalate resin of the present invention do not directly touch the recycled resin layers 2 and 12. Therefore, even when cosmetics are filled, it is possible to sufficiently ensure hygiene and safety.

The effect of the non-recyclable layer 14 of polyethylene terephthalate resin disposed outside the regenerated resin layer 12 in the laminated container 11 using the regenerated polyethylene terephthalate resin having a three-layer structure of the present invention. about,
The use of recycled ethylene terephthalate resin has a large effect of covering the deterioration in moldability, and the production of layers 3 and 13 of non-recyclable polyterephthalate ethylene resin disposed inside recycled resin layers 2 and 12 This will be described in the following description of the manufacturing method together with the effect at the time.

Similarly, regarding the structural characteristics and physical properties of the poly (ethylene terephthalate) resin used for the layers 3, 13, and 14 of the poly (ethylene terephthalate) resin which are not regenerated,
Layer 3 of poly (ethylene terephthalate) resin without regeneration
The use of the recycled polyterephthalate ethylene resin of Examples 13 and 14 greatly contributes to the effect of covering the reduction in moldability, and will be described in the following description of the production method.

Next, a method for manufacturing a laminated container using the recycled ethylene polyterephthalate resin of the present invention will be described. The laminated container using the recycled ethylene polyterephthalate resin of the present invention can be manufactured by an injection blow molding method or an extrusion blow molding method. The injection blow molding method and the extrusion blow molding method are each a kind of blow molding method. In the blow molding method, a parison (a tube-shaped one molded by an injection molding method or an extrusion molding method) in a softened state is sandwiched by a mold that has been processed into a shape obtained by inverting the appearance of a product in advance, and is compressed air. Is a method of inflating a parison using the method described above, and forming a resin product such as a hollow container by bringing the parison into close contact with a mold.

The blow molding method is roughly classified into two types, namely, an injection blow molding method and an extrusion blow molding method. These differences stem from the method of parison formation. In the injection blow molding method, a parison is formed into a bottomed test tube by an injection molding method. on the other hand,
In the extrusion blow molding method, the parison is formed into a bottomless pipe shape by the extrusion molding method.

The injection blow molding method, which is a feature of each molding method, has a parison having a uniform wall thickness, and has a high accuracy and a small uneven thickness compared to the extrusion blow molding method. It is said that products can be manufactured,
Polyethylene terephthalate resins that do not rely on regeneration are often used for molding. However, it is usually difficult to maintain the characteristics of the injection blow molding method by applying the injection blow molding method to a resin material composed of only the recycled polyethylene terephthalate ethylene resin due to the performance degradation of the recycled polyethylene terephthalate resin. is there.

In addition, the extrusion blow molding method requires fewer molds for molding than the injection blow molding method, and does not require a high precision mold as in the injection blow molding method. Therefore, higher productivity can be expected. However, generally, ethylene polyterephthalate resin differs from polyethylene and the like in that it acts as a Newtonian fluid at the time of melting during the molding process, and has a low melt viscosity at a low shear rate. Therefore, when the parison is discharged by the extruder, the parison is extended due to its own weight, that is, the drawdown of the parison is large, and the wall thickness is reduced, so that a uniform molded product cannot be obtained.

Therefore, it is considered difficult to form it by injection blow. Such difficulties are further promoted in regenerated poly (ethylene terephthalate) resin having reduced performance and lower viscosity. In order to avoid the problems of the injection blow molding method and the extrusion blow molding method as described above, the structure of the laminated container using the recycled ethylene polyterephthalate resin of the present invention effectively contributes.

Hereinafter, a method for manufacturing a laminated container using the recycled ethylene polyterephthalate resin of the present invention by injection blow molding will be described with reference to the drawings. FIG. 3 is a diagram for explaining a method of manufacturing a laminated container using the recycled poly (ethylene terephthalate) resin of the present invention by an injection blow molding method. First, as shown in FIG. 3A, a parison made of polyethylene terephthalate resin is injection-molded without using regeneration. The parison injection molding is performed by clamping the parison molding die 21 and injecting a parison 22 made of poly (ethylene terephthalate) resin which is not regenerated.

Next, as shown in FIG. 3B, the parison is extracted. To remove the parison, open the parison molding dies 21a, 21b, 21c and open the parison 2
2 is withdrawn. Next, as shown in FIG. 3 (C), the recycled polyterephthalic acid ethylene resin (PE)
Injection molding of T) is performed. In this injection molding, similarly to the above-mentioned injection molding of the parison 22 made of polyethylene terephthalate resin which is not based on regeneration, an injection mold (not shown) is used, and a recycled resin layer of recycled polyterephthalate ethylene resin is used. 23 is formed outside the layer 24 of polyethylene terephthalate ethylene resin which is not based on regeneration.

As a result, a layer 24 of polyethylene terephthalate resin not formed by regeneration is formed inside the layer 23 of regenerated polyterephthalate ethylene resin, and a laminated parison 25 having a two-layer structure is formed. Next, as shown in FIG. 3D, mold clamping is performed. The mold is clamped by sandwiching the laminated parison 25 in the blow molding mold 26.

Next, as shown in FIG. 3E, compressed air is blown. The laminated parison 25 is expanded by blowing compressed air, and is brought into close contact with the blow molding die 26 to be cooled and solidified as it is. Finally, FIG.
Open the mold as shown in FIG. The mold opening is performed by opening the blow molds 26a and 26b, and the molded product 27 is taken out.

As described above, one cycle of the method for producing a laminated container having the above-mentioned regenerated poly (ethylene terephthalate) resin of the present invention by the injection blow molding method and having a two-layer structure is completed. By repeating the above steps continuously, laminated containers using the recycled poly (ethylene terephthalate) resin of the present invention are mass-produced.

Incidentally, in the step of performing injection molding of the recycled ethylene polyterephthalate resin shown in FIG.
A layer of poly (ethylene terephthalate) resin which is not regenerated by forming a layer of poly (ethylene terephthalate) resin not formed on the outer side of the regenerated poly (ethylene terephthalate) resin layer 23 of the obtained laminated parison 25 by further similar injection molding. A layer of poly (ethylene terephthalate) resin is formed on the inner side and the outer side of the layer 23, which are not regenerated, to form a laminated parison having a three-layer structure.

By using the laminated parison having the three-layer structure and applying the above-described steps shown in FIGS. 3D to 3F in the same manner as described above, the recycled poly (ethylene terephthalate) resin of the present invention can be obtained. It is possible to manufacture a laminated container having a three-layer structure, which is used. In the laminated container using the recycled polyethylene terephthalate ethylene resin of the present invention, a layer of the polyethylene terephthalate ethylene resin which is not based on the regeneration is disposed inside or inside and outside the layer of the recycled polyethylene terephthalate resin, and at the time of molding. It has a two-layer structure or a three-layer structure that supports a layer of regenerated poly (ethylene terephthalate) resin.

Therefore, even if the regenerated poly (ethylene terephthalate) resin is used, it is possible to maintain excellent moldability in which a container with less uneven thickness, which is a feature of the injection blow molding method, can be manufactured. Next, a method of manufacturing a laminated container using the recycled poly (ethylene terephthalate) resin of the present invention by an extrusion blow molding method will be described with reference to the drawings.

FIG. 4 is a diagram for explaining a method of manufacturing a laminated container using the recycled poly (ethylene terephthalate) resin of the present invention by an extrusion blow molding method. First, FIG.
The parison is extruded as shown in FIG. The parison 31 is composed of a recycled resin layer 32 of recycled polyethylene terephthalate resin and layers 33a and 33b of non-recyclable ethylene terephthalate resin disposed inside and outside the layer of recycled polyethylene terephthalate resin. It has a layered structure.

Next, as shown in FIGS. 4A and 4B, the mold is clamped. After the mold clamping, the parison 31 in the softened state is removed from the mold 34a, as shown in FIG.
34b, compressed air is blown into the parison 31 so that the parison 31 is expanded and brought into close contact with the mold 34 to be cooled and solidified as it is. Finally, as shown in FIG. 4C, the mold is opened. Mold 3 with mold opening
4, the molded product 35 is taken out, and one cycle in the extrusion blow molding method is completed. The molded article 35 has a three-layer structure in which layers 37a and 37b of polyethylene terephthalate resin not depending on the reproduction are arranged inside and outside a regenerated resin layer 36 of regenerated polyethylene terephthalate resin.

The above process is repeated continuously, and the molded product 35 is mass-produced. FIG. 5 is a view showing the structure of a parison having a two-layer structure. As shown in FIG. 5, during the extrusion of the parison, the parison 41 is replaced with a recycled resin layer of recycled polyterephthalic ethylene resin. 42 and a layer 43 made of polyethylene terephthalate ethylene resin that is not regenerated and disposed inside the layer 42 of the regenerated resin, so as to have a two-layer structure. ,
A molded article having a two-layer structure can be obtained by arranging a layer 43 of polyethylene terephthalate resin which is not based on the regeneration inside the layer 42 of recycled ethylene terephthalate resin.

In the laminated container using the regenerated poly (ethylene terephthalate) resin of the present invention, a layer of the poly (ethylene terephthalate) resin which does not rely on high-performance regeneration is provided inside or inside and outside the layer of the regenerated poly (ethylene terephthalate) resin. It has a two-layer structure or a three-layer structure that supports the layer of regenerated poly (ethylene terephthalate) resin at the time of parison extrusion and blow molding.

Therefore, even if the recycled poly (ethylene terephthalate) resin is used, drawdown which is a problem of the extrusion blow molding method can be suppressed, and a molded article such as a container can be manufactured.
Further, as the polyethylene terephthalate resin not due to regeneration, a resin whose viscosity at the time of melting is set to be higher than that of a polyethylene terephthalate resin not due to normal regeneration, inside or inside the layer of the recycled polyethylene terephthalate resin. It is also possible to mold a laminated container using the recycled poly (ethylene terephthalate) resin of the present invention by arranging it outside.

In this case, it is possible to use a modified ethylene terephthalate resin which does not depend on regeneration, instead of the normal ethylene terephthalate resin which does not rely on regeneration. As the modified ethylene terephthalate resin, a polyethylene terephthalate ethylene resin modified with cyclohexanedimethanol, isopropanol, or the like can be used.

The modified poly (ethylene terephthalate) resin has a viscosity characteristic of an intrinsic viscosity of 0.8 or more,
The melt viscosity at a shear angular velocity of 0.1 radian / second is 10,000.
It is desirable to be at least CPS. By satisfying such physical properties, compared to the case of using a modified poly (ethylene terephthalate) resin which does not rely on normal regeneration, the layer of the recycled poly (ethylene terephthalate) resin is more sufficiently supported,
The effect of suppressing drawdown during extrusion is sufficient.

Accordingly, in the laminated container using the regenerated poly (ethylene terephthalate) resin of the present invention, the modified poly (ethylene terephthalate) resin having a high characteristic and not being regenerated is provided inside or inside and outside the layer of the regenerated poly (ethylene terephthalate) resin. Can be formed to have a two-layer structure or a three-layer structure that supports the layer of the regenerated polyterephthalate resin at the time of parison extrusion and blow molding. The drawdown, which is a problem of the blow molding method, is suppressed, and a molded article such as a high-quality container can be manufactured.

[0054]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A laminated container using recycled poly (ethylene terephthalate) resin according to an embodiment of the present invention will be described below. FIG. 6 is a view for explaining the structure of a laminated container using recycled poly (ethylene terephthalate) resin which is an example according to the present invention.

The laminated container 51 using the recycled ethylene polyterephthalate resin according to the embodiment of the present invention has
A recycled resin layer 52 made of recycled polyterephthalate ethylene resin having a thickness of 0 μm, and a polyethylene terephthalate resin not having a thickness of 200 μm and disposed on the inside and outside of the recycled resin layer 52, respectively. Layers 53,5
4 has a three-layer laminated structure.

Therefore, when the contents are filled, the contents do not touch the regenerated resin layer 52 made of regenerated ethylene polyterephthalate resin, and the hygiene and safety of the contents are ensured. The production method followed the same extrusion blow molding method as described above. The polyethylene terephthalate resin not used for regeneration used at this time was a modified polyterephthalate ethylene resin having an intrinsic viscosity of 1.2, a melting point of 230 ° C., and a shear angular velocity of 0.1 rad / sec and a melt viscosity of 100,000 CPS.

By using such a resin, there is no drawdown at the time of extrusion during the molding process, and therefore, a laminated container using a high-quality regenerated polyterephthalate ethylene resin having a uniform thickness without any uneven wall thickness is formed. did it. From the above,
It is possible to provide a laminated container using a recycled poly (ethylene terephthalate) resin capable of avoiding a production problem due to a decrease in moldability of the recycled product while using the recycled product from the viewpoint of environmental protection. became.

[0058]

According to the first aspect of the present invention, the contents to be filled in the container do not come into direct contact with the regenerated poly (ethylene terephthalate) resin, and the problems of hygiene and safety are avoided. I have. Therefore, it is possible to provide a laminated container using a recycled polyethylene terephthalate ethylene resin capable of sufficiently ensuring hygiene and safety in a manufactured molded product while using a recycled product from the viewpoint of environmental protection. It becomes possible.

According to the second aspect of the present invention, the obtained container has a high productivity in order to cover the deterioration of the moldability due to the recycled ethylene polyterephthalate resin. Therefore,
While using recycled products from the viewpoint of environmental protection, it is possible to avoid manufacturing problems due to reduced moldability of recycled products, and to further ensure hygiene and safety in manufactured molded products. It is possible to provide a laminated container using recycled poly (ethylene terephthalate) resin.

According to the third aspect of the invention, at the time of molding, from the inside of the layer of the regenerated poly (ethylene terephthalate) resin by the novel layer of the poly (ethylene terephthalate) resin not depending on the regeneration, or from both the inside and the outside of the layer. The support is sufficiently strong and can be efficiently and integrally formed. Therefore, it is possible to provide a laminated container using a recycled ethylene polyterephthalate resin capable of avoiding a production problem due to a decrease in moldability of the recycled product while using the recycled product from the viewpoint of environmental protection. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a laminated container using a recycled ethylene polyterephthalate resin having a two-layer structure according to the present invention.

FIG. 2 is a longitudinal sectional view of a laminated container using a recycled poly (ethylene terephthalate) resin having a three-layer structure according to the present invention.

FIG. 3 is a diagram illustrating a method for producing a laminated container using the recycled poly (ethylene terephthalate) resin of the present invention by an injection blow molding method.

FIG. 4 is a diagram illustrating a method for producing a laminated container using the recycled poly (ethylene terephthalate) resin of the present invention by an extrusion blow molding method.

FIG. 5 is a diagram showing the structure of a parison having a two-layer structure.

FIG. 6 is a view illustrating a structure of a laminated container using a recycled ethylene polyterephthalate resin according to an example of the present invention.

[Explanation of symbols]

1, 11, 51 laminated container 2, 12, 23, 32, 36, 42, 52 recycled resin layer 3, 13, 14, 24, 33, 37, 43, 53, 54
Polyterephthalic acid ethylene resin layer 21 Parison molding die 22, 31, 41 Parison 25 Laminated parison 26 Blow molding die 27, 35 Molded product 34 Mold

Claims (3)

[Claims] 1. A laminate comprising a recycled resin layer made of a recycled ethylene polyterephthalate resin and a layer of a non-recyclable ethylene terephthalate resin disposed at least inside or outside the recycled resin layer. A laminated container using recycled ethylene polyterephthalate resin having a structure. 2. A laminated container using the recycled ethylene polyterephthalate resin according to claim 1, wherein the recycled ethylene resin is molded according to an extrusion blow molding method or an injection blow molding method. Laminated container. 3. The laminated container using recycled ethylene terephthalate resin according to claim 1, wherein the polyethylene terephthalate resin molded by an extrusion blow molding method,
Lamination using a regenerated poly (ethylene terephthalate) resin characterized by being a modified poly (ethylene terephthalate) resin having an intrinsic viscosity of 0.8 or more and a melt viscosity at a shear angular velocity of 0.1 radian / second and a physical property of 10,000 or more CPS. container.