Polyester composition and product thereof

Abstract

To provide a polyester composition and a product thereof that are excellent in mechanical properties, heat resistance, and processability.SOLUTION: A polyester composition includes a resin (A), a fiber reinforcement (B), an organic reinforcement (C), a crystal nucleating agent (D), and a toughening agent (E). An intrinsic viscosity of the resin (A) is 0.6 dL / g to 0.85 dL / g.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a polyester composition, and more particularly to a polyester composition that can be processed under low temperature conditions and an article made therefrom. [Background technology]

[0002] Most commonly seen tableware today is made of melamine. However, if melamine tableware is broken or damaged, it can release toxins when exposed to heat, which can enter the human body and damage organs. Furthermore, commonly seen polyester tableware today is made from polyethylene terephthalate (PET) with a nucleating agent. Polyethylene terephthalate containing a nucleating agent must be injection molded at a high mold temperature (e.g., 130°C) or at a low mold temperature followed by post-crystallization, and the resulting tableware can only withstand a heat temperature of 150°C. Therefore, how to improve the production efficiency and heat resistance of non-toxic products is an urgent issue for those skilled in the art. Summary of the Invention [Problem to be solved by the invention]

[0003] The present invention provides a polyester composition and a product thereof that are excellent in mechanical properties, heat resistance, and processability. [Means for solving the problem]

[0004] The polyester composition of the present invention comprises a resin (A), a fiber reinforcing material (B), an inorganic reinforcing material (C), a nucleating agent (D), and a toughening agent (E). The resin (A) has an intrinsic viscosity (IV) of 0.6 dL / g to 0.85 dL / g.

[0005] In one embodiment of the present invention, the resin (A) described above comprises virgin polyethylene terephthalate (PET) resin, recycled polyethylene terephthalate (RPET), or a combination thereof.

[0006] In one embodiment of the present invention, the above-mentioned fiber reinforcement (B) comprises glass fiber, carbon fiber, titanium fiber, boron fiber, or a combination thereof.

[0007] In one embodiment of the present invention, the amount of the fiber reinforcing material (B) is 5 to 20 parts by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0008] In one embodiment of the present invention, the aforementioned inorganic reinforcing material (C) comprises talc powder, titanium dioxide, silicon dioxide, calcium carbonate, or a combination thereof.

[0009] In one embodiment of the present invention, the amount of the inorganic reinforcing material (C) is 5 to 20 parts by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0010] In one embodiment of the present invention, the above-mentioned nucleating agent (D) comprises at least one organic nucleating agent.

[0011] In one embodiment of the present invention, the aforementioned toughening agent (E) comprises ethylene-methyl acrylate-glycidyl methacrylate terpolymer (EMA-g-GMA), glycidyl methacrylate grafted polyolefin elastomer (POE-g-GMA), styrene-ethylene / butylene-styrene copolymer (SEBS), maleic anhydride grafted styrene-ethylene / butylene-styrene block copolymer (SEBS-g-MAH), methyl methacrylate-butadiene-styrene (MBS), or a combination thereof.

[0012] In one embodiment of the present invention, the polyester composition further comprises a lubricant (F), which comprises stearates, polyethylene wax, siloxane-modified materials, fluorine-based resins, or combinations thereof.

[0013] In one embodiment of the present invention, the polyester composition further comprises an antioxidant (G), which comprises a hindered phenol antioxidant, a phenol antioxidant, a phosphite antioxidant, a complex antioxidant, or a combination thereof.

[0014] In one embodiment of the present invention, the polyester composition further comprises a lubricant (F), an antioxidant (G), or a combination thereof, wherein the amount of the lubricant (F) is 0.1 to 2 parts by weight, and the amount of the antioxidant (G) is 0.2 to 2 parts by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0015] In one embodiment of the present invention, the amount of resin (A) is 60 to 80 parts by weight, the amount of nucleating agent (D) is 2.5 to 10 parts by weight, and the amount of reinforcing agent (E) is 0.3 to 2 parts by weight, where the total amount of the polyester composition is 100 parts by weight.

[0016] The products of the present invention are produced using the above-described polyester composition as engineering plastic granules. [Effects of the Invention]

[0017] Based on the above, the polyester composition of the present invention comprises a resin (A), a fiber reinforcing material (B), an inorganic reinforcing material (C), a nucleating agent (D), and a toughening agent (E), and the intrinsic viscosity of the resin (A) is 0.6 dL / g to 0.85 dL / g. This allows the polyester composition to have excellent mechanical properties, heat resistance, and processability. In addition, the polyester composition of the present invention can be processed into engineering plastic granules and can be processed at low mold temperatures, simplifying the manufacturing process and making it easy to implement, making it valuable for industrial mass production.

[0018] For a clearer understanding of the above-mentioned features and advantages of the present invention, particular reference is made to the following detailed description of the preferred embodiments. DETAILED DESCRIPTION OF THE INVENTION

[0019] The embodiments of the present invention are described in detail below. The implementation details provided in the embodiments are for illustrative purposes only and do not restrict the scope of protection of the present invention. Those skilled in the art may modify or change these implementation details based on the requirements of actual implementation modes. In addition, descriptions of well-known devices, methods, and materials may be omitted so as not to obscure the description of various principles of the present invention.

[0020] As used herein, ranges expressed as "about" one particular value to "about" another particular value may be expressed directly as from the one particular value and / or to the other particular value. When such a range is expressed, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another embodiment. It will also be understood that the endpoints of each range may be expressly related to the other endpoint, or may be independent of the other endpoint.

[0021] As used herein, non-limiting terms (eg, may, may be, for example, or other similar terms) are optional but not required practices, including addition or presence.

[0022] Unless otherwise defined, terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art. Furthermore, terms (as defined in commonly used dictionaries) should be understood to have meanings consistent with their meanings in the relevant art, and should not be construed as idealized or overly formal unless expressly defined herein.

[0023] <Polyester composition> The present invention provides a polyester composition comprising a resin (A), a fiber reinforcing material (B), an inorganic reinforcing material (C), a nucleating agent (D), and a toughening agent (E). The polyester composition of the present invention may further comprise a lubricant (F), an antioxidant (G), or other suitable additives, as needed. Each of the above-mentioned components will be described in detail below.

[0024] Resin (A) The intrinsic viscosity of resin (A) is 0.6 dL / g to 0.85 dL / g, preferably 0.6 dL / g to 0.76 dL / g. If the intrinsic viscosity of resin (A) is less than 0.6 dL / g, the impact resistance of the polyester composition may be reduced, potentially resulting in insufficient strength and / or cracking of the polyester composition or its products. If the intrinsic viscosity of resin (A) is higher than 0.85 dL / g, the melt flow index (MI) of the polyester composition may be increased, which may reduce the flowability of the polyester composition and make it difficult to apply in subsequent processing steps.

[0025] The structure / composition of resin (A) is not particularly limited, and an appropriate resin may be selected as needed. For example, resin (A) may include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), or other suitable resins. The polyethylene terephthalate may include virgin polyethylene terephthalate resin, recycled polyethylene terephthalate, or a combination thereof. Sources of recycled polyethylene terephthalate may include, but are not limited to, recycled packaging granules, recycled film granules, recycled fabric granules, industrial recycled environmentally friendly recycled polyester granules, or other suitable polyethylene terephthalate products to meet the needs of recycled material introduction. The recycled packaging granules may include recycled bottle granules (e.g., recycled PET bottle granules), recycled tray granules, or other suitable packaging material products.

[0026] The amount of resin (A) is 60 to 80 parts by weight, preferably 65 to 72 parts by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0027] Fiber reinforcement material (B) The fiber reinforcing material (B) is not particularly limited, and an appropriate fiber reinforcing material may be selected as needed. In this embodiment, the fiber reinforcing material (B) may include glass fiber, carbon fiber, titanium fiber, boron fiber, a combination thereof, or other appropriate fiber reinforcing material, with glass fiber or carbon fiber being preferred. When the polyester composition includes the fiber reinforcing material (B), the polyester composition can be provided with desirable impact resistance, flexural strength, rigidity, and heat resistance, i.e., desirable mechanical properties and heat resistance.

[0028] The amount of fiber reinforcement (B) is 5 to 20 parts by weight, preferably 8 to 15 parts by weight, based on 100 parts by weight of the total amount of the polyester composition. When the amount of fiber reinforcement (B) is within the above range, the polyester composition can be provided with excellent mechanical properties, heat resistance, and processability. When the amount of fiber reinforcement (B) is less than 5 parts by weight, the heat resistance of the polyester composition may be deteriorated. When the amount of fiber reinforcement (B) is more than 20 parts by weight, the melt flow index of the polyester composition may be increased, which may deteriorate the flowability of the polyester composition and make it difficult to apply in subsequent processing steps.

[0029] Inorganic reinforcement material (C) The inorganic reinforcing material (C) is not particularly limited, and an appropriate inorganic reinforcing material may be selected as needed. In this embodiment, the inorganic reinforcing material (C) includes talc powder, titanium dioxide, silicon dioxide, calcium carbonate, a combination thereof, or other appropriate inorganic reinforcing materials, with talc powder or calcium carbonate being preferred. When the polyester composition includes the inorganic reinforcing material (C), the polyester composition can be provided with desirable bending strength, rigidity, heat resistance, and moldability.

[0030] The amount of inorganic reinforcing material (C) is 5 to 20 parts by weight, preferably 8 to 18 parts by weight, based on 100 parts by weight of the total amount of the polyester composition. When the amount of inorganic reinforcing material (C) is within the above-mentioned range, the polyester composition can be provided with favorable mechanical properties, heat resistance, and processability. When the amount of inorganic reinforcing material (C) is less than 5 parts by weight, the heat resistance of the polyester composition may be deteriorated and demolding during molding may be difficult. When the amount of inorganic reinforcing material (C) is more than 20 parts by weight, the impact resistance of the polyester composition may be reduced, potentially preventing the polyester composition or its products from passing a drop test.

[0031] Nucleating Agent (D) The nucleating agent (D) is not particularly limited, and an appropriate nucleating agent (D) may be selected as needed. In this embodiment, the nucleating agent (D) may include at least one organic nucleating agent. The organic nucleating agent may include an organic sodium salt or other suitable organic nucleating agent. The organic sodium salt may include sodium benzoate, sodium montanate, Surlyn resin (e.g., EMAA (trade name) manufactured by DuPont), or other suitable organic sodium salt. Sodium benzoate, Surlyn resin, or a combination thereof is preferred, and a combination of sodium benzoate and Surlyn resin is more preferred. The weight mixing ratio of sodium benzoate to Surlyn resin may be 1:10 to 1:20, preferably 1:12 to 1:16. When the polyester composition includes the nucleating agent (D), the heat resistance of the polyester composition can be improved.

[0032] The amount of the nucleating agent (D) is 2.5 to 10 parts by weight, preferably 3 to 5 parts by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0033] Strengthener (E) The toughening agent (E) is not particularly limited, and an appropriate toughening agent may be selected as needed. In this embodiment, the toughening agent (E) may include ethylene-methyl acrylate-glycidyl methacrylate terpolymer, glycidyl methacrylate-grafted polyolefin elastomer, styrene-ethylene / butylene-styrene copolymer, maleic anhydride-grafted styrene-ethylene / butylene-styrene block copolymer, methyl methacrylate-butadiene-styrene, combinations thereof, or other suitable toughening agents, with ethylene-methyl acrylate-glycidyl methacrylate terpolymer (EMA-g-GMA) being preferred. When the polyester composition contains the toughening agent (E), the interfacial compatibility between the components in the polyester composition and impact resistance can be improved.

[0034] The amount of the reinforcing agent (E) is 0.3 to 2 parts by weight, preferably 0.5 to 1 part by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0035] Lubricant (F) The lubricant (F) is not particularly limited, and an appropriate lubricant may be selected as needed. In this embodiment, the lubricant (F) may include stearates, polyethylene wax, siloxane-modified compounds, fluorine-based resins, combinations thereof, or other suitable lubricants, with polyethylene wax being preferred. When the polyester composition includes the lubricant (F), the flowability of the polyester composition can be improved. This contributes to improving the flowability and mold releasability in subsequent processing steps (e.g., injection molding).

[0036] The amount of the lubricant (F) is 0.1 to 2 parts by weight, preferably 0.3 to 1 part by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0037] Antioxidant (G) The antioxidant (G) is not particularly limited, and an appropriate antioxidant may be selected as needed. In this embodiment, the antioxidant (G) may include a hindered phenol-based antioxidant, a phenol-based antioxidant, a phosphite-based antioxidant, a complex antioxidant, a combination thereof, or other suitable antioxidants, with complex antioxidants being preferred. For example, the complex antioxidant may include a combination of a hindered phenol-based antioxidant and a phosphite-based antioxidant, or a combination of other suitable antioxidants. The weight mixing ratio of the hindered phenol-based antioxidant to the phosphite-based antioxidant may be 2:1 to 1:2, preferably 1:1 to 1:1.5. When the polyester composition includes the antioxidant (G), the heat resistance and processability of the polyester composition can be improved.

[0038] The amount of the antioxidant (G) is 0.2 to 2 parts by weight, preferably 0.3 to 1 part by weight, based on 100 parts by weight of the total amount of the polyester composition.

[0039] <Method of producing polyester composition> There is no particular limitation on the method for producing the polyester composition. For example, the resin (A), the fiber reinforcing material (B), the inorganic reinforcing material (C), the nucleating agent (D), and the reinforcing agent (E) are placed in a mixer and stirred to homogeneously mix them into a solution, and if necessary, a lubricant (F) and an antioxidant (G) may be added, and after homogeneous mixing, a liquid polyester composition is obtained.

[0040] <Product> One exemplary embodiment of the present invention provides an article of manufacture using the above-described polyester composition as an engineering plastic granule.

[0041] For example, the polyester composition may be processed into engineering plastic granules to produce a product. The processing step is not particularly limited, and an appropriate processing step may be selected as needed. The processing step may include extrusion molding, injection molding, sheet processing, or other suitable processing methods.

[0042] The temperature of the molding die in the processing step may be 80°C or less, preferably 60°C to 80°C, so that the product molded in the die does not need to be cooled before the subsequent step can be carried out, and the subsequent step can be carried out directly, thereby improving the production efficiency of the product and reducing energy consumption.

[0043] The present invention will be described in detail below with reference to examples. The following examples are provided to illustrate the present invention, and the scope of the present invention includes the following claims and their alternatives and modifications, and is not limited to the scope of the examples.

[0044] Example In order to demonstrate that the polyester composition provided by the present invention has excellent mechanical properties, heat resistance, and processability, experimental examples are given below.

[0045] The types and amounts of components of the polyester compositions of Example 1 and Comparative Examples 1 to 6 are listed in Tables 1 and 2 below. The produced polyester compositions were analyzed by the following test methods, and the results are shown in Tables 1 and 2.

[0046] [Table 1] JPEG2025186130000002.jpg47163

[0047] *The glass fiber selected for the fiber reinforcement (B) is HP 3786 (trade name, manufactured by PFG FIBER GLASS CORPORATION), which is a short fiber with a diameter of 10 micrometers and a length of 4.5 micrometers. *The Surlyn resin selected for the nucleating agent (D) is Surlyn 8920 (trade name, manufactured by DuPont). *The complex antioxidant selected for antioxidant (G) is B225 (trade name, manufactured by Double Bond Chemical Ind., Co., Ltd.), which is a mixture of a hindered phenol-based antioxidant and a phosphite-based antioxidant in a 1:1 weight ratio.

[0048] [Table 2] JPEG2025186130000004.jpg82163

[0049] <Test Method> Impact strength: Tested according to ASTM D256 standard. The resulting value (kg-cm / cm) represents the total amount of energy that the polyester composition can withstand at break. The higher the value, the higher the impact strength that the polyester composition can withstand (or the resistance strength of the polyester composition).

[0050] Tensile strength: Tested according to ASTM D638 standard. The obtained value is the total amount of energy that the polyester composition can withstand when tensile deformed. The higher the value, the higher the tensile strength that the polyester composition can withstand.

[0051] Flexural strength: Tested according to ASTM D790 standard. The obtained value indicates the resistance of the polyester composition to bending deformation. The higher the value, the higher the bending strength that the polyester composition can withstand.

[0052] Flexural modulus: Tested according to ASTM D790 standard. The obtained value is the total amount of energy that the polyester composition can withstand when bending. The higher the value, the higher the rigidity of the polyester composition.

[0053] Heat deflection temperature (HDT): Tested under a pressure of 0.45 MPa according to ASTM D648. The obtained value represents the resistance of the polyester composition to heat deflection. The higher the value, the higher the heat resistance of the polyester composition.

[0054] Melt flow index: Based on the ASTM D1238 standard, the amount of flow was measured at 275°C for 10 minutes using a weight of 2.16 kg. The obtained value represents the fluidity of the polyester composition. A higher value indicates a higher viscosity of the polyester composition.

[0055] Moldability: The polyester composition was injection molded at a mold temperature of 80°C to produce a product. The product was observed to determine whether it was produced normally, whether it was unmoldable, or whether it was released from the mold and could not be injected (i.e., it stuck to the mold). If the product was molded normally, it indicates that the polyester composition has excellent moldability.

[0056] Drop test: The polyester composition product was dropped from a height of 1.8 meters and observed to see if it broke. If the product did not break, it indicated that the polyester composition product had excellent toughness.

[0057] <Test Results> Table 1 shows that when a polyester composition contains only resin (A), fiber reinforcement (B), inorganic reinforcement (C), nucleating agent (D), and toughening agent (E), and the intrinsic viscosity of resin (A) is 0.6 dL / g to 0.85 dL / g (Example 1), the polyester composition exhibits excellent impact resistance, flexural strength, rigidity, heat resistance (e.g., up to 170°C), fluidity, moldability, and toughness, i.e., excellent mechanical properties and moldability, and can be used to produce crack-resistant products. In contrast, when the intrinsic viscosity of resin (A) in the polyester composition is not within the range of 0.6 dL / g to 0.85 dL / g (Comparative Examples 1 and 2), the impact resistance, flexural strength, rigidity, heat resistance, fluidity, moldability, and / or toughness are poor. When the intrinsic viscosity of resin (A) in the polyester composition is less than 0.6 dL / g (Comparative Example 1), products made from the polyester composition may crack after a drop test. When the intrinsic viscosity of the resin (A) in the polyester composition is higher than 0.85 dL / g (Comparative Example 2), the polyester composition becomes unmoldable when injected at high pressure (high power) during the process of manufacturing the product.

[0058] Furthermore, Table 2 shows that, compared with a polyester composition not containing fiber reinforcing material (B) or a polyester composition in which the amount of fiber reinforcing material (B) is less than 5 parts by weight, assuming the total amount of the polyester composition to be 100 parts by weight (Comparative Example 3), the polyester composition containing fiber reinforcing material (B) in an amount of 5 to 20 parts by weight (Example 1) has excellent impact resistance, flexural strength, rigidity, and heat resistance, and at the same time has excellent moldability and toughness.

[0059] Furthermore, compared to a polyester composition (Comparative Example 4) in which the amount of fiber reinforcing material (B) is more than 20 parts by weight, assuming the total amount of the polyester composition to be 100 parts by weight, the polyester composition (Example 1) in which the amount of fiber reinforcing material (B) is 5 to 20 parts by weight has excellent moldability and at the same time has excellent impact resistance, flexural strength, rigidity, and heat resistance.

[0060] Furthermore, compared with a polyester composition that does not contain inorganic reinforcing material (C) or a polyester composition in which the amount of inorganic reinforcing material (C) is less than 5 parts by weight, assuming the total amount of the polyester composition to be 100 parts by weight (Comparative Example 5), the polyester composition that contains inorganic reinforcing material (C) and whose amount is 5 to 20 parts by weight (Example 1) is excellent in flexural strength, rigidity, heat resistance, and moldability, and at the same time has excellent impact resistance and toughness.

[0061] Furthermore, compared to a polyester composition (Comparative Example 6) in which the amount of inorganic reinforcing material (C) is more than 20 parts by weight, assuming the total amount of the polyester composition to be 100 parts by weight, the polyester composition (Example 1) in which the amount of inorganic reinforcing material (C) is 5 to 20 parts by weight is excellent in impact resistance, flexural strength, and toughness, and at the same time combines excellent rigidity and heat resistance.

[0062] In summary, the polyester composition of the present invention comprises a resin (A), a fiber reinforcement (B), an inorganic reinforcement (C), a nucleating agent (D), and a toughening agent (E), and when the resin (A) has an intrinsic viscosity of 0.6 dL / g to 0.85 dL / g, the polyester composition has excellent mechanical properties and moldability, allowing it to be used in subsequent processing to produce products, particularly injection molding, at low mold temperatures (e.g., below 80°C). Furthermore, products made from the polyester composition of the present invention have excellent toughness, no cracks after a drop test, and can be made from environmentally friendly recycled materials, reducing carbon emissions. This makes the polyester composition suitable for use in products such as tableware, which require excellent heat resistance. At the same time, the products are microwave-safe and non-toxic, making them highly versatile.

[0063] Although the present invention has been disclosed in the above embodiments, these are not used to limit the present invention, and those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is subject to that defined by the scope of the attached patent application. [Industrial Applicability]

[0064] The polyester composition of the present invention can be applied to products such as tableware where excellent heat resistance is essential, and the products can have microwave-safe and non-toxic properties.

Claims

1. A resin (A) having an intrinsic viscosity of 0.6 dL / g to 0.85 dL / g; A fiber reinforcement material (B); an inorganic reinforcing material (C); a nucleating agent (D); a strengthening agent (E); Including, Polyester composition.

2. The resin (A) comprises virgin polyethylene terephthalate resin, recycled polyethylene terephthalate, or a combination thereof; The polyester composition of claim 1.

3. The fiber reinforcement material (B) includes glass fiber, carbon fiber, titanium fiber, boron fiber, or a combination thereof; The polyester composition of claim 1.

4. The amount of the fiber reinforcing material (B) is 5 parts by weight to 20 parts by weight, based on 100 parts by weight of the total amount of the polyester composition. The polyester composition of claim 1.

5. The inorganic reinforcing material (C) comprises talc powder, titanium dioxide, silicon dioxide, calcium carbonate, or a combination thereof; The polyester composition of claim 1.

6. The amount of the inorganic reinforcing material (C) is 5 parts by weight to 20 parts by weight, based on 100 parts by weight of the total amount of the polyester composition. The polyester composition of claim 1.

7. The nucleating agent (D) comprises at least one organic nucleating agent; The polyester composition of claim 1.

8. the toughening agent (E) comprises an ethylene-methyl acrylate-glycidyl methacrylate terpolymer, a glycidyl methacrylate grafted polyolefin elastomer, a styrene-ethylene / butylene-styrene copolymer, a maleic anhydride grafted styrene-ethylene / butylene-styrene block copolymer, a methyl methacrylate-butadiene-styrene, or a combination thereof; The polyester composition of claim 1.

9. Lubricant (F) Further comprising: The lubricant (F) comprises stearates, polyethylene wax, siloxane-modified materials, fluorine-based resins, or combinations thereof; The polyester composition of claim 1.

10. Antioxidant (G) Further comprising: The antioxidant (G) includes a hindered phenol-based antioxidant, a phenol-based antioxidant, a phosphite-based antioxidant, a complex antioxidant, or a combination thereof. The polyester composition of claim 1.

11. a lubricant (F), an antioxidant (G), or a combination thereof Further comprising: When the total amount of the polyester composition is 100 parts by weight, the amount of the lubricant (F) is 0.1 parts by weight to 2 parts by weight, and the amount of the antioxidant (G) is 0.2 parts by weight to 2 parts by weight. The polyester composition of claim 1.

12. When the total amount of the polyester composition is 100 parts by weight, the amount of the resin (A) is 60 parts by weight to 80 parts by weight, the amount of the nucleating agent (D) is 2.5 parts by weight to 10 parts by weight, and the amount of the reinforcing agent (E) is 0.3 parts by weight to 2 parts by weight. The polyester composition of claim 1.

13. Produced using the polyester composition according to any one of claims 1 to 12 as engineering plastic granules. product.

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