Extruded laminate film made from recycled resin composition

Abstract

To provide an extrusion-laminated film which is formed by recycling a composite plastic where two or more kinds of different resins are mixed, and is excellent in film appearance and heat sealability.SOLUTION: An extrusion-laminated film has at least one layer which is composed of a resin composition containing 70 pts.wt. or more and 99 pts.wt. or less of a plastic waste (A) containing two or more kinds of thermoplastic resins, and 1 pts.wt. or more and 30 pts.wt. or less (100 pts.wt. of total of (A) and (B)) of a compatibilizer (B), and a base material layer.SELECTED DRAWING: None

Description

[[Technical Field]]

[0001] The present invention relates to an extrusion-laminated film comprising at least one layer made of a resin composition containing a compatibilizer and plastic waste containing two or more thermoplastic resins, and a base material layer. [[Background Art]]

[0002] In recent years, interest in the problem of environmental pollution caused by plastics has increased, and material recycling of plastic products has been promoted.

[0003] In material recycling of plastics, the collected plastic waste is often melted and returned to raw material pellets, or recycled into consumable materials such as pallets.

[0004] At this time, if the collected plastic waste is recycled in a state where different types of plastics are mixed therein, the poor compatibility between the different plastics causes a problem that the physical properties of the recycled plastic deteriorate.

[0005] For this reason, a current process involves sorting the collected plastic waste by material and then recycling it into products. However, multi-layer films, multi-layer containers and the like (hereinafter referred to as composite plastics) in which different types of plastics are laminated cannot be recycled because it is difficult to separate them by material, and the current situation is that they are landfilled or incinerated.

[0006] Against this background, addition of a compatibilizer has been studied as a means of recycling composite plastics.

[0007] For example, studies have been conducted on the recycling of composite plastics such as polyethylene (PE)-polyethylene terephthalate (PET) and polypropylene (PP)-acrylonitrile-butadiene-styrene copolymer (ABS) using ionomer resin as a compatibilizer (see Patent Document 1). In addition, studies have been conducted on the recycling of composite plastics such as PE-PET using ethylene-vinyl acetate copolymer as a compatibilizer (see Patent Document 2). According to these documents, it has been shown that the physical properties of composite materials such as PE and PET or ethylene vinyl alcohol copolymer (EVOH) can be improved by adding a compatibilizer.

[0008] As these documents show, methods for modifying composite plastics into recycled resins with superior physical properties are being investigated, but there are still few product developments using recycled composite plastic resins. In order to popularize the recycling of composite plastics, it is important to expand the applications of recycled composite plastic resins. [Prior art documents] [Patent Documents]

[0009] [Patent Document 1] Japanese Patent Publication No. 2001-220473 [Patent Document 2] Japanese Patent Publication No. 2021-080428 [Overview of the project] [Problems that the invention aims to solve]

[0010] The present invention aims to provide a film made from plastic waste that exhibits excellent heat-seal strength and film appearance. [Means for solving the problem]

[0011] As a result of diligent research to solve the aforementioned problems, the inventors of the present invention have found that a film obtained by extruding and laminating a resin containing two or more thermoplastic resins with a compatibilizer added exhibits excellent heat sealability and film appearance, thus completing the present invention.

[0012] In other words, the various embodiments of the present invention are as follows [1] to [9]. [1] An extruded laminate film having at least one layer made of a resin composition containing 70 to 99 parts by weight of plastic waste (A) containing two or more thermoplastic resins and 1 to 30 parts by weight of a compatibilizer (B) (total of (A) and (B) is 100 parts by weight), and a base layer. [2] The extruded laminate film according to [1] above, wherein the plastic waste (A) contains at least a polyolefin and one or more resins selected from the group consisting of polyester, polyamide and ethylene-vinyl alcohol copolymer as other components. [3] The extruded laminate film according to [2] above, wherein the polyester is polyethylene terephthalate and the polyamide is nylon 6. [4] An extruded laminate film according to any of [1] to [3] above, wherein the most abundant component of the thermoplastic resin contained in the plastic waste (A) is polyolefin. [5] The extruded laminate film according to [4] above, wherein the polyolefin is 70 parts by weight or more and 99 parts by weight or less, and the other components are 1 part by weight or more and 30 parts by weight or less (the total of the polyolefin and other components is 100 parts by weight). [6] An extruded laminate film according to any one of [1] to [5] above, wherein the compatibilizer (B) is at least one selected from the group consisting of ethylene-vinyl acetate copolymer, maleic anhydride-modified polyolefin, and ethylene-glycidyl methacrylate copolymer. [7] An extruded laminate film according to any of [1] to [6] above, wherein the melt mass flow rate of the resin composition (under the conditions of 190°C and a 2.16 kg load) is 1 g / 10 min or more and 30 g / 10 min or less. [8] An extruded laminate film according to any one of [1] to [7] above, wherein the base layer is a film made of paper, polyethylene terephthalate, polyethylene, or polypropylene. [9] A method for producing an extruded laminate film according to any one of [1] to [8] above, comprising extruding and laminating a resin composition containing 70 to 99 parts by weight of plastic waste (A) containing two or more thermoplastic resins and 1 to 30 parts by weight of a compatibilizer (B) (total of (A) and (B) is 100 parts by weight) onto a substrate layer at 270°C to 300°C. [Effects of the Invention]

[0013] The extruded laminate film of the present invention exhibits excellent film appearance and heat seal strength, making it useful for molded products requiring these physical properties. Furthermore, it contributes to improving the recycling rate of composite plastics, which were previously often discarded. [Modes for carrying out the invention]

[0014] The present invention will be described in detail below with reference to its preferred embodiments.

[0015] An extruded laminate film according to one aspect of the present invention comprises at least one layer made of a resin composition containing 70 to 99 parts by weight of plastic waste (A) containing two or more thermoplastic resins and 1 to 30 parts by weight of a compatibilizer (B) (the total of (A) and (B) is 100 parts by weight), and a base layer.

[0016] Plastic waste (A) is not particularly limited as long as it contains two or more types of thermoplastic resins, but examples include factory waste such as trimming losses and substandard products of multilayer film generated at film factories, and waste consisting of multilayer film such as food packaging discarded by consumers, and mixtures of these may also be used. In terms of shape, there are no particular limitations, but examples include films, bottles, cups, trays, and tubes.

[0017] Examples of the thermoplastic resin include polyolefin, polyamide, ethylene-vinyl alcohol copolymer, polyester, polystyrene, and the like.

[0018] Examples of the polyolefin include high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polypropylene, ethylene-propylene copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid ester copolymer, and the like.

[0019] Examples of the polyamide include nylon 6, nylon 6,6, nylon 11, nylon 12, and the like.

[0020] Examples of the polyester include polyethylene terephthalate, glycol-modified polyethylene terephthalate (PETG resin), polybutylene terephthalate, polylactic acid, and the like.

[0021] Among these, as the resin contained in the plastic waste (A), it is preferable that the resin contains at least polyolefin because of excellent moldability for extrusion lamination; as other resins, at least one selected from the group consisting of polyester, polyamide and ethylene-vinyl alcohol copolymer is preferable; polyethylene terephthalate is preferable as the polyester, and nylon 6 is preferable as the polyamide.

[0022] As the resin contained in the plastic waste (A), it is preferable that the component with the highest content ratio is polyolefin because of excellent heat seal strength; regarding the content ratios, it is preferable that polyolefin accounts for 70 parts by weight or more and 99 parts by weight or less, and other components account for 1 part by weight or more and 30 parts by weight or less.

[0023] The compatibilizer (B) is not particularly limited as long as it can compatibilize two or more types of thermoplastic resins contained in the plastic waste (A), and examples thereof include ethylene-vinyl acetate copolymer, acid-modified polyolefin, ethylene-glycidyl methacrylate copolymer, ionomer resin, oxazoline group-containing resin, and the like.

[0024] Examples of acid-modified polyolefins include maleic anhydride-modified polyethylene, maleic anhydride-modified polypropylene, maleic anhydride-modified ethylene-propylene (block or random) copolymer, maleic anhydride-modified ethylene-ethyl acrylate copolymer, and maleic anhydride-modified ethylene-vinyl acetate copolymer.

[0025] Among these, ethylene-vinyl acetate copolymer, maleic anhydride-modified polyethylene, and ethylene-glycidyl methacrylate copolymer are preferred because they have excellent film moldability and heat sealability for recycled resin extruded laminate films, and ethylene-vinyl acetate copolymer is more preferred because it has excellent film appearance.

[0026] The ethylene-vinyl acetate copolymer may also be an ethylene-vinyl acetate copolymer composition containing multiple ethylene-vinyl acetate copolymers with different vinyl acetate content. In this case, from the viewpoint of compatibility, it is preferable that there are three or more types of ethylene-vinyl acetate copolymers, the difference in vinyl acetate content of each ethylene-vinyl acetate copolymer is preferably 40% by weight or less, and furthermore, the difference in vinyl acetate content of at least one set of ethylene-vinyl acetate copolymers is preferably 5% by weight or more.

[0027] The ratio of plastic waste (A) to compatibilizer (B) contained in the above resin composition is 70 to 99 parts by weight of plastic waste (A) and 1 to 30 parts by weight of compatibilizer (B). More preferably, it is 80 to 99 parts by weight of plastic waste (A) and 1 to 20 parts by weight of compatibilizer (B). Most preferably, it is 90 to 99 parts by weight of plastic waste (A) and 1 to 10 parts by weight of compatibilizer (B). The total amount of plastic waste (A) and compatibilizer (B) is 100 parts by weight.

[0028] If the compatibilizer (B) is less than 1 part by weight, the effect of improving heat seal strength and film appearance is insufficient, and if it exceeds 30 parts by weight, the film moldability deteriorates, which is undesirable.

[0029] A virgin resin may be blended into the resin composition containing plastic waste (A) and a compatibilizer (B) as needed. The virgin resin to be blended is not particularly limited, but low-density polyethylene is preferred because it has excellent extrusion lamination processability.

[0030] The melt mass flow rate (MFR) of a resin composition containing plastic waste (A) and a compatibilizer (B), measured at 190°C and under a 2.16 kg load, is not particularly limited, but is preferably 1 g / 10 min to 30 g / 10 min, more preferably 5 g / 10 min to 20 g / 10 min, and most preferably 5 g / 10 min to 12 g / 10 min, as this provides excellent extrusion lamination processability.

[0031] The method for producing a resin composition containing plastic waste (A) and a compatibilizer (B) is not particularly limited as long as each component can be dispersed, and it can be produced using commonly used resin mixing equipment. Examples of mixing equipment include single-screw extruders, twin-screw extruders, multi-screw extruders, Banbury mixers, pressure kneaders, rotary rolls, and internal mixers. Among these, twin-screw extruders are preferred due to their excellent dispersibility and continuous production capabilities.

[0032] When kneading with a twin-screw extruder, the screw rotation speed is not particularly limited, but it is preferable to knead at 50 rpm to 3000 rpm, and more preferably at 150 rpm to 1000 rpm. A screw rotation speed of 50 rpm or higher is preferable because it improves the dispersibility of each mixed component and results in a resin with excellent physical properties. A screw rotation speed of 3000 rpm or lower is also preferable because it prevents deterioration of the resin due to excessive shear heat, resulting in a resin with excellent physical properties.

[0033] The mixing temperature is preferably around 300°C, which is the melting point of the component with the lowest melting point among the plastic waste (A) containing two or more thermoplastic resins and the compatibilizer (B), or the glass transition temperature if it is an amorphous resin.

[0034] Furthermore, the resin composition containing plastic waste (A) and a compatibilizer (B) may also contain, to the extent that it does not impair the effects of the present invention, an antistatic agent, a light stabilizer, an ultraviolet absorber, a nucleating agent, a lubricant, an antioxidant, an antiblocking agent, a flow improver, a mold release agent, a flame retardant, a colorant, an inorganic neutralizing agent, a hydrochloric acid absorbent, a filler conductive agent, a chain length extender, a hydrolysis inhibitor, and the like.

[0035] Furthermore, the resin composition containing plastic waste (A) and a compatibilizer (B) can be used in any form, such as pellets or powder.

[0036] Examples of substrate layers constituting an extruded laminate film according to one aspect of the present invention include synthetic polymer films and sheets, metal foils, papers, cellophane, etc. Examples include films and sheets made of synthetic polymers such as polyethylene terephthalate, polyamide, polyvinyl alcohol, polycarbonate, polyethylene, and polypropylene. Furthermore, these polymer films and sheets may be further coated with aluminum vapor deposition, alumina vapor deposition, or silicon dioxide vapor deposition. In addition, these polymer films and sheets may be further printed using urethane-based inks or the like.

[0037] Examples of metal foils include aluminum foil and copper foil, while examples of paper include kraft paper, fine paper, and glassine paper.

[0038] Among these, paper, polyethylene terephthalate, polyethylene, and polypropylene are preferred as the substrate layer because they exhibit excellent substrate adhesion when a resin composition consisting of plastic waste (A) containing two or more thermoplastic resins constituting the present invention and a compatibilizer (B) is laminated by extrusion lamination.

[0039] An extruded laminate film having at least one layer made of a resin composition containing the above-mentioned plastic waste (A) and a compatibilizer (B), and a base layer, is formed by an extrusion lamination method.

[0040] Examples of methods for obtaining extruded laminated films by the extrusion lamination method include various extrusion lamination methods such as single lamination, tandem lamination, sandwich lamination, and co-extrusion lamination.

[0041] In the extrusion lamination method, the molding temperature of the layer of the resin composition consisting of plastic waste (A) containing thermoplastic resin and a compatibilizer (B) is preferably in the range of 240°C to 350°C, more preferably in the range of 270°C to 330°C, and even more preferably in the range of 270°C to 300°C. The surface temperature of the cooling roll is preferably in the range of 10°C to 50°C.

[0042] Furthermore, in the extrusion lamination method, the processing speed when forming a layer of a resin composition containing two or more types of thermoplastic resins (A) and a compatibilizer (B) is preferably in the range of 10 m / min to 200 m / min.

[0043] In such extrusion lamination processes, it is preferable to use a method in which, immediately after extruding a resin composition containing plastic waste (A) and a compatibilizer (B) in a molten state into a layer, the substrate bonding surface of the layer is exposed to oxygen-containing gas or ozone-containing gas, and then bonded to the substrate, because this method provides excellent adhesion to the substrate layer. The amount of ozone gas to be treated is 1 m of film made from the resin composition extruded from the die. 2 It is preferable to blow 0.5 mg or more of ozone per unit.

[0044] Furthermore, in order to further improve the adhesion between the resin composition layer containing plastic waste (A) and a compatibilizer (B) and the substrate layer, known surface treatments such as anchor coating, corona treatment, flame treatment, and plasma treatment may be applied to the adhesive surface of the substrate layer as needed.

[0045] Furthermore, in order to further improve the adhesion between the layer of the resin composition containing plastic waste (A) and a compatibilizer (B) and the substrate layer, heat treatment can be performed at a temperature of 3°C to 60°C for 1 hour or more.

[0046] An extruded laminate film has at least one layer (I) of a resin composition containing plastic waste (A) and a compatibilizer (B), and a base layer, and can also be a multilayer film containing other layers. The laminate configuration is not particularly limited, but for example, it may include not only layer (I) and base layer (S) but also layers made of other components, such as a polyolefin layer (II). Specifically, examples include (I) / (S), (II) / (I) / (S), (II) / (I) / (II) / (S), (II) / (I) / (S) / (I) / (II), etc.

[0047] The above-mentioned extruded laminate film can be used for a variety of applications, including automotive parts, housings for electrical and electronic components, building materials, civil engineering materials, agricultural materials, containers, packaging materials, and daily necessities. [Examples]

[0048] The present invention will be described below with reference to examples and comparative examples, but the present invention is not limited to these. (1) Meltmass flow rate (MFR) The MFR of the resin composition and compatibilizer was measured using a melt indexer (manufactured by Takara Industries Co., Ltd.) at 190°C and under a load of 2.16 kg. (2) Heat seal strength To measure the heat seal strength, two pieces of extruded laminate film were cut to a width of 100 mm and a length of 100 mm. The laminated surfaces of the two pieces were overlapped, and heat-sealed using a TP-701 heat seal tester (manufactured by Tester Sangyo Co., Ltd.) at a set temperature of 140°C, single-sided heating, an air pressure of 0.2 MPa, and a sealing time of 1 second with a 10 mm wide, 300 mm long sealing bar. These test pieces were then cut to a width of 15 mm, and a peel test was performed using a Tensilon RTE-1210 tensile tester (manufactured by Orientec Co., Ltd.) at a tensile speed of 300 mm / min and under T-type peel conditions to measure the seal strength. (3) Number of fisheye (FE) 1 m of extruded laminate film 2 The number of fisheye lenses per area was visually measured. [Example 1] As plastic waste (A) containing two or more thermoplastic resins, trimming loss of multilayer film containing polyethylene (PE) and nylon 6 (PA6) generated at a laminate film manufacturer was used. 95 parts by weight of this plastic waste (A) containing two or more thermoplastic resins was crushed using a rotary cutter, and 5 parts by weight of ethylene-vinyl acetate copolymer (B1) (manufactured by Tosoh Corporation, trade name Ultrasen 640), with a vinyl acetate content of 25% by weight and a melt mass flow rate of 3 g / 10 min, was weighed as a compatibilizer (B). After pre-blending in a tumbler mixer, the mixture was melt-kneaded at 250°C using a twin-screw extruder to obtain resin composition pellets. The resin composition of the obtained pellets was 85 parts by weight of PE, 10 parts by weight of PA6, and 5 parts by weight of B1, with a melt mass flow rate of 10 g / min.

[0049] The above resin composition pellets were supplied to a single-screw extruder laminator (manufactured by Sumitomo Heavy Industries Modern Co., Ltd.) having a screw with a diameter of 40 mmφ. The pellets were extruded from the T-die so that the resin temperature directly below the T-die reached 300°C. A laminated film consisting of low-density polyethylene (25 μm thick, manufactured by Tosoh Corporation, trade name Petrocene 203) and biaxially oriented polyethylene terephthalate (PET) film (12 μm thick), which had been previously prepared by extrude lamination, was used as the base layer. Extrude lamination molding was performed on the low-density polyethylene side of this base layer at a take-up speed of 50 m / min, an air gap length of 130 mm, and a resin composition layer thickness of 25 μm to obtain an extruded laminate film.

[0050] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Example 2] Extruded laminate films were obtained using the same method as in Example 1, except that trimming loss from multilayer films containing PE and PET, generated at a laminate film manufacturer, was used as plastic waste (A) containing two or more types of thermoplastic resins. The resin composition of the obtained resin composition pellets was 85 parts by weight of PE, 10 parts by weight of PET, and 5 parts by weight of B1, and the MFR was 8 g / min.

[0051] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Example 3] Except that a biaxially oriented PET film (Toyobo Ester Film E-5100, manufactured by Toyobo Co., Ltd., 12 μm thick) was used as the base layer, and a urethane-based adhesive (a mixture of 15 parts Takelac A3210 manufactured by Mitsui Chemicals, Inc., 5 parts Takenate A3072 manufactured by Mitsui Chemicals, Inc., and 140 parts ethyl acetate) was applied to the corona-treated surface of the biaxially oriented PET film, and then a resin was extruded and laminated onto the surface coated with the urethane-based adhesive. An extruded laminate film was obtained using the same method as in Example 1.

[0052] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Example 4] Base layer with a basis weight of 50 g / m² 2 Except for using kraft paper and applying corona discharge treatment (3kW) to the kraft paper, an extruded laminate film was obtained using the same method as in Example 1, except that a resin was extruded and laminated onto the corona discharge treated surface.

[0053] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. This will be shown. [ reference Example 5] As a compatibilizer (B), 3 g / 10 min of maleic anhydride-modified moltmas flow rate Polyethylene (B2) (manufactured by SK Geo Centric Japan Co., Ltd., product name) Except for using OREVAC OE825, the same method as in Example 1 was used for extrusion lamination. A film was obtained. The resin composition of the obtained resin composition pellets was 85 parts by weight of PE. The composition was 10 parts by weight of PA6 and 5 parts by weight of B2, and the MFR was 2 g / min.

[0054] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Example 6] Extruded laminate films were obtained by the same method as in Example 1, except that an ethylene-vinyl acetate copolymer composition (B3) having the following composition was used as the compatibilizer (B). The ethylene-vinyl acetate copolymer composition (B3) was melt-kneaded once in a twin-screw extruder at 160°C and then pelletized before use.

[0055] • Ethylene-vinyl acetate copolymer (manufactured by Tosoh Corporation, product name UltraCen 640) 50% by weight, vinyl acetate content 25% by weight, melt mass flow rate 3g / 10min • Ethylene-vinyl acetate copolymer (Lanxess Co., Ltd., product name: Levaprene 500) 25% by weight, with a vinyl acetate content of 50% by weight and a melt mass flow rate of 3 g / 10 min. • Ethylene-vinyl acetate copolymer (Lanxess Co., Ltd., product name: Levaprene 800) 25% by weight, with a vinyl acetate content of 80% by weight and a melt mass flow rate of 5g / 10min. The resin composition of the obtained resin composition pellets was 85 parts by weight of PE, 10 parts by weight of PA6, and 5 parts by weight of B3, and the MFR was 10 g / min.

[0056] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Example 7] Except for using a biaxially oriented PET film (Toyobo Ester Film E-5100, manufactured by Toyobo Co., Ltd., with a thickness of 12 μm) as the base layer, applying a urethane-based adhesive (a mixture of 15 parts of Takelac A3210 manufactured by Mitsui Chemicals, Inc., 5 parts of Takenate A3072 manufactured by Mitsui Chemicals, Inc., and 140 parts of ethyl acetate) to the corona-treated surface of the biaxially oriented PET film, and then extruding and laminating a resin onto the surface coated with the urethane-based adhesive, an extruded laminate film was obtained using the same method as in Example 6.

[0057] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Example 8] Base layer with a basis weight of 50 g / m² 2Except for using kraft paper and applying corona discharge treatment (3kW) to the kraft paper, an extruded laminate film was obtained using the same method as in Example 6, except that a resin was extruded and laminated onto the corona discharge treated surface.

[0058] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Comparative Example 1] Extruded laminate films were obtained using the same method as in Example 1, except that trimming loss of multilayer films containing PE and PA6 generated at a laminate film manufacturer was used as plastic waste (A) containing two or more thermoplastic resins, and a compatibilizer (B) was not used. The resin composition of the obtained resin composition pellets was 90 parts by weight of PE and 10 parts by weight of PA6, and the MFR was 11 g / min.

[0059] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Comparative Example 2] As plastic waste (A) containing two or more thermoplastic resins, trimming loss of multilayer film containing PE and PET generated at a laminate film manufacturer will be used. Except for not using compatibilizer (B) An extruded laminate film was obtained using the same method as in Example 1. The resin composition of the obtained resin composition pellet was 90 parts by weight of PE and 10 parts by weight of PET6, and the MFR was 9 g / min.

[0060] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Comparative Example 3] Except for using a biaxially oriented PET film (Toyobo Ester Film E-5100, manufactured by Toyobo Co., Ltd., with a thickness of 12 μm) as the base layer, and applying a urethane-based adhesive (a mixture of 15 parts Takelac A3210 manufactured by Mitsui Chemicals, Inc., 5 parts Takenate A3072 manufactured by Mitsui Chemicals, Inc., and 140 parts ethyl acetate) to the corona-treated surface of the biaxially oriented PET film, and then extruding and laminating a resin onto the surface coated with the urethane-based adhesive, an extruded laminate film was obtained using the same method as in Comparative Example 1.

[0061] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1. [Comparative Example 4] Base layer with a basis weight of 50 g / m² 2 Except for using kraft paper and applying corona discharge treatment (3kW) to the kraft paper, an extruded laminate film was obtained using the same method as in Comparative Example 1, where a resin was extruded and laminated onto the corona discharge-treated surface.

[0062] The obtained extruded laminate film was measured using the evaluation method described above. The evaluation results are shown in Table 1.

[0063] [Table 1] [Industrial applicability]

[0064] The extruded laminate film of the present invention can be used in a variety of applications, including automotive parts, housings for electrical and electronic components, building materials, civil engineering materials, agricultural materials, containers, packaging materials, and daily necessities.

Claims

1. An extruded laminate film having at least one layer made of a resin composition containing 70 to 99 parts by weight of plastic waste (A) containing two or more thermoplastic resins, and 1 to 30 parts by weight of ethylene-vinyl acetate copolymer as a compatibilizer (B) (total of (A) and (B) is 100 parts by weight), and a base layer.

2. The extruded laminate film according to claim 1, wherein the plastic waste (A) contains at least a polyolefin and one or more resins selected from the group consisting of polyester, polyamide, and ethylene-vinyl alcohol copolymer as other components.

3. The extruded laminate film according to claim 2, wherein the polyester is polyethylene terephthalate and the polyamide is nylon 6.

4. The extruded laminate film according to claim 1, wherein the most abundant component of the thermoplastic resin contained in the plastic waste (A) is polyolefin.

5. The extruded laminate film according to claim 4, wherein the polyolefin is 70 parts by weight or more and 99 parts by weight or less, and the other components are 1 part by weight or more and 30 parts by weight or less (the total of the polyolefin and other components is 100 parts by weight).

6. The extruded laminate film according to claim 1, wherein the melt mass flow rate of the resin composition (under the conditions of 190°C and a 2.16 kg load) is 1 g / 10 min or more and 30 g / 10 min or less.

7. The extruded laminate film according to claim 1, wherein the base layer is a film made of paper, polyethylene terephthalate, polyethylene, or polypropylene.

8. A method for producing an extruded laminate film according to any one of claims 1 to 7, comprising extruding and laminating a resin composition containing 70 to 99 parts by weight of plastic waste (A) containing two or more thermoplastic resins and 1 to 30 parts by weight of a compatibilizer (B) (total of (A) and (B) is 100 parts by weight) onto a substrate layer at 270°C to 300°C.

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