Heat-resistant polyester material, preparation method thereof and application of heat-resistant polyester material in preparation of polyester tableware

Abstract

The invention provides a heat-resistant polyester material as well as a preparation method and application thereof in preparation of polyester tableware, and relates to the technical field of high polymer materials, the heat-resistant polyester material comprises the following components: a thermoplastic polymer, a flaky nucleating agent, polyethylene glycol, a compatilizer, a coupling agent, a dispersing agent, an antioxidant and an optional toner, the heat-resistant polyester material provided by the invention is non-toxic, harmless, free of melamine / formaldehyde release, free of plasticizer precipitation, recyclable and recyclable, and meanwhile, the polyester tableware provided by the invention has excellent barrier (oxygen barrier) performance besides good heat resistance and mechanical properties.

Description

Technical Field

[0001] The invention relates to the technical field of polymer materials, in particular to a heat-resistant polyester material and a preparation method thereof and application of the heat-resistant polyester material in preparing polyester tableware. Background Art

[0002] There are three main types of tableware products currently used in the market: ceramic tableware, stainless steel tableware and melamine tableware. Among them, melamine tableware, also known as imitation porcelain tableware, is made of melamine resin that has been cured by heating and pressure. It is currently widely used in restaurants, canteens, hotels, schools, homes and other places. However, since the main raw materials for the production of melamine resin are melamine and formaldehyde, there is a risk of precipitation during use, especially after high temperature and long-term use, the migration of free formaldehyde and melamine will greatly increase, directly endangering human health. In addition, melamine tableware is a thermosetting material and cannot be recycled or reused.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] One of the purposes of the present invention is to provide a heat-resistant polyester material to at least solve one of the technical problems existing in the prior art. The heat-resistant polyester material provided by the present invention is non-toxic, harmless, does not release melamine / formaldehyde, does not precipitate plasticizer, and is recyclable and reusable.

[0005] A second object of the present invention is to provide a method for preparing a heat-resistant polyester material.

[0006] The third object of the present invention is to provide a heat-resistant polyester material or the use of the heat-resistant polyester material prepared by the preparation method in the preparation of polyester tableware.

[0007] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0008] In a first aspect, the present invention provides a heat-resistant polyester material, comprising the following components: a thermoplastic polymer, a flake nucleating agent, polyethylene glycol, a compatibilizer, a coupling agent, a dispersant, an antioxidant and an optional toner.

[0009] Further, the thermoplastic polymer includes at least one of polyester and ABS resin;

[0010] Preferably, the polyester includes at least one of PET and PBT.

[0011] Further, the following components are included by weight percentage:

[0012] 10-50% polyester, 5-45% ABS resin, 30-50% flake nucleating agent, 0.1-2% polyethylene glycol, 1-7% compatibilizer, 0.1-2% coupling agent, 0.1-5% dispersant and 0.1-2% antioxidant;

[0013] Preferably, the heat-resistant polyester material comprises the following components by weight percentage:

[0014] 30-40% polyester, 20-30% ABS resin, 30-35% flake nucleating agent, 0.2-1% polyethylene glycol, 3-5% compatibilizer, 0.1-2% coupling agent, 0.1-5% dispersant and 0.1-2% antioxidant;

[0015] Preferably, the heat-resistant polyester material further comprises, by weight percentage: 0.1-5% toner;

[0016] Preferably, the toner includes at least one of titanium dioxide and carbon black.

[0017] Further, the flake nucleating agent includes at least one of talc, mica and montmorillonite;

[0018] Preferably, the aspect ratio of the plate-like nucleating agent is ≥20.

[0019] Furthermore, the polyethylene glycol includes at least one of PEG400, PEG2000 and PEG6000.

[0020] Furthermore, the compatibilizer includes at least one of methacrylic acid modified ABS, maleic anhydride modified ABS and glycidyl methacrylate modified ABS.

[0021] Furthermore, the coupling agent includes at least one of a silane coupling agent and a titanate coupling agent.

[0022] Further, the dispersant includes at least one of polyethylene wax, silicone powder and fatty acid ester;

[0023] The antioxidant includes at least one of the antioxidant 1010 and the antioxidant 168 .

[0024] In a second aspect, the present invention provides a method for preparing the heat-resistant polyester material, comprising the following steps:

[0025] The thermoplastic polymer, flake nucleating agent, polyethylene glycol, compatibilizer, coupling agent, dispersant, antioxidant and optional toner in the formulated amount are mixed, extruded, drawn and granulated in sequence to obtain the heat-resistant polyester material.

[0026] In a third aspect, the present invention provides an application of the heat-resistant polyester material or the heat-resistant polyester material prepared by the preparation method in the preparation of polyester tableware.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The heat-resistant polyester material provided by the present invention has a thermoplastic polymer in its components that provides a basic structure for the material and improves the mechanical properties and heat resistance of the material. The flaky nucleating agent in its components helps to improve the crystallization rate and mechanical properties of the material. The polyethylene glycol in its components can reduce the glass transition temperature of the material, increase the flexibility and plasticity of the material, and is also a crystallization promoter that can increase the crystallization rate of the material. The compatibilizer is used to improve the compatibility between the components, thereby improving the overall performance of the material. The coupling agent is mainly used to improve the binding force between the inorganic filler (such as the flaky nucleating agent) and the organic matrix (such as the thermoplastic polymer) and improve the dispersibility and stability of the components. The dispersant helps to improve the uniform distribution of additives of other components in the polymer matrix. The antioxidant can improve the anti-oxidation performance of the material, significantly extend the service life of the material, and maintain the stability of its physical and chemical properties. The toner is mainly used to adjust the color presented by the material. The heat-resistant polyester material provided by the present invention is non-toxic, harmless, free of melamine / formaldehyde release, free of plasticizer, green and environmentally friendly, and belongs to a thermoplastic material, which is recyclable and reusable, and has excellent heat resistance and mechanical properties. DETAILED DESCRIPTION

[0029] Unless otherwise defined herein, scientific and technical terms used in conjunction with the present invention shall have the meanings commonly understood by those of ordinary skill in the art. The meaning and scope of the terms should be clear, however, in the case of any potential ambiguity, the definitions provided herein take precedence over any dictionary or external definitions. In this application, unless otherwise stated, the use of "or" means "and / or". In addition, the use of the term "including" and other forms is non-limiting.

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The first aspect of the present invention provides a heat-resistant polyester material, comprising the following components: a thermoplastic polymer, a flake nucleating agent, polyethylene glycol, a compatibilizer, a coupling agent, a dispersant, an antioxidant and an optional toner.

[0032] In the present invention, the thermoplastic polymer in the heat-resistant polyester material component provides the basic structure for the material, improves the mechanical properties and heat resistance of the material, the flake nucleating agent in the component helps to improve the crystallization rate and mechanical properties of the material, the polyethylene glycol in the component can reduce the glass transition temperature of the material, increase the flexibility and plasticity of the material, and is also a crystallization promoter, which can increase the crystallization rate of the material, the compatibilizer is used to improve the compatibility between the components, thereby improving the overall performance of the material, the coupling agent is mainly used to improve the binding force between the inorganic filler (such as the flake nucleating agent) and the organic matrix (such as the thermoplastic polymer), and improve the dispersibility and stability of the component, the dispersant helps to improve the uniform distribution of the additives of other components in the polymer matrix, the antioxidant can improve the antioxidant performance of the material, significantly extend the service life of the material, and maintain the stability of its physical and chemical properties, and the colorant is mainly used to adjust the color presented by the material. The heat-resistant polyester material provided by the present invention is non-toxic, harmless, does not release melamine / formaldehyde, does not contain plasticizers, is green and environmentally friendly, and is a thermoplastic material that is recyclable and reusable. It is a green and environmentally friendly material with excellent heat resistance (above 100°C) and mechanical properties.

[0033] In some preferred embodiments, the thermoplastic polymer includes at least one of polyester and ABS resin;

[0034] In the present invention, polyester has good strength, toughness and chemical resistance, and polyester can improve the heat resistance of the material; ABS resin has excellent impact strength and toughness, can significantly improve the impact resistance of the material, and the addition of ABS resin can improve the fluidity and processing performance of the material, making it easier to be formed through processes such as injection molding.

[0035] Preferably, the polyester includes at least one of PET and PBT.

[0036] In some preferred embodiments, the following components are included by weight percentage:

[0037] 10-50% polyester, 5-45% ABS resin, 30-50% flake nucleating agent, 0.1-2% polyethylene glycol, 1-7% compatibilizer, 0.1-2% coupling agent, 0.1-5% dispersant and 0.1-2% antioxidant;

[0038] Taking the total weight of the heat-resistant polyester material as 100%, the added amount of polyester is 10-50%, for example, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, etc.;

[0039] Based on the total weight of the heat-resistant polyester material being 100%, the addition amount of the ABS resin is 5-45%, for example, 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, etc.;

[0040] Based on the total weight of the heat-resistant polyester material being 100%, the added amount of the flake nucleating agent is 30-50%, for example, 30%, 35%, 40%, 45%, 50%, etc.;

[0041] Based on the total weight of the heat-resistant polyester material as 100%, the added amount of polyethylene glycol is 0.1-2%, for example, it can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, etc.;

[0042] Based on the total weight of the heat-resistant polyester material as 100%, the added amount of the compatibilizer is 1-7%, for example, it can be 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, etc.;

[0043] Based on the total weight of the heat-resistant polyester material as 100%, the addition amount of the coupling agent is 0.1-2%, for example, it can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, etc.;

[0044] Based on the total weight of the heat-resistant polyester material as 100%, the added amount of the dispersant is 0.1-5%, for example, 0.1%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.;

[0045] Based on the total weight of the heat-resistant polyester material as 100%, the added amount of the antioxidant is 0.1-2%, for example, it can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, etc.

[0046] Preferably, the heat-resistant polyester material comprises the following components by weight percentage:

[0047] 30-40% polyester, 20-30% ABS resin, 30-35% flake nucleating agent, 0.2-1% polyethylene glycol, 3-5% compatibilizer, 0.1-2% coupling agent, 0.1-5% dispersant and 0.1-2% antioxidant;

[0048] Taking the total weight of the heat-resistant polyester material as 100%, the added amount of polyester is 30-40%, for example, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, etc.;

[0049] Taking the total weight of the heat-resistant polyester material as 100%, the addition amount of the ABS resin is 20-30%, for example, 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%, etc.;

[0050] Based on the total weight of the heat-resistant polyester material being 100%, the added amount of the flake nucleating agent is 30-35%, for example, 30%, 31%, 32%, 33%, 34%, 35%, etc.;

[0051] Based on the total weight of the heat-resistant polyester material as 100%, the added amount of polyethylene glycol is 0.2-1%, for example, it can be 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%;

[0052] Based on the total weight of the heat-resistant polyester material being 100%, the added amount of the compatibilizer is 3-5%, for example, 3%, 3.5%, 4%, 4.5%, 5%, etc.;

[0053] Based on the total weight of the heat-resistant polyester material as 100%, the addition amount of the coupling agent is 0.1-2%, for example, it can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, etc.;

[0054] Based on the total weight of the heat-resistant polyester material as 100%, the added amount of the dispersant is 0.1-5%, for example, 0.1%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc.;

[0055] Based on the total weight of the heat-resistant polyester material as 100%, the added amount of the antioxidant is 0.1-2%, for example, it can be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%, 1.1%, 1.2%, 1.3%, 1.4%, 1.5%, 1.6%, 1.7%, 1.8%, 1.9%, 2%, etc.;

[0056] In the present invention, when the polyester addition amount is 30-40%, the ABS resin addition amount is 20-30%, the flaky nucleating agent addition amount is 30-35%, the polyethylene glycol addition amount is 0.2-1%, and the compatibilizer addition amount is 3-5%, the tableware product has excellent barrier (oxygen barrier) properties in addition to good heat resistance and mechanical properties. This may be because the polyester and ABS under this raw material ratio form a dual continuous phase, and the flaky nucleating agent and polyethylene glycol are opened and peeled off under the shearing action of the twin screw, and are dispersed in the ABS continuous phase to form a physical barrier layer, thereby producing a barrier effect, which can reduce the oxygen permeability. The lunch box with this barrier function can delay the oxidation and deterioration of the food contained therein, thereby extending the shelf life and shelf life of the food.

[0057] Preferably, the heat-resistant polyester material further comprises, by weight percentage: 0.1-5% toner;

[0058] Preferably, the toner includes at least one of titanium dioxide and carbon black.

[0059] In some preferred embodiments, the plate-like nucleating agent includes at least one of talc, mica and montmorillonite;

[0060] In the present invention, the addition of a flake nucleating agent can promote the crystallization process, so that more small and evenly distributed grains are formed inside the material, making the microstructure of the material more uniform and improving its overall performance. It can accelerate the crystallization rate, increase the crystallinity of the material, improve the mechanical properties of the material (such as strength, hardness) and increase the heat resistance temperature.

[0061] Preferably, the aspect ratio of the plate-like nucleating agent is ≥20.

[0062] In some preferred embodiments, the polyethylene glycol includes at least one of PEG400, PEG2000 and PEG6000.

[0063] In the present invention, polyethylene glycol can reduce the glass transition temperature of the material, increase the flexibility and plasticity of the material, and is also a crystallization accelerator that can increase the crystallization rate of the material. The addition of polyethylene glycol can improve the fluidity of the material, making it easier to flow and fill the mold during processing.

[0064] In some preferred embodiments, the compatibilizer includes at least one of methacrylic acid modified ABS, maleic anhydride modified ABS and glycidyl methacrylate modified ABS.

[0065] In the present invention, the compatibilizer is used to improve the compatibility between the polyester and the ABS resin, prevent the two phases from separating, and form a uniform mixture. The compatibilizer can also enhance the interface bonding force between different components and improve the overall performance of the material.

[0066] In some preferred embodiments, the coupling agent includes at least one of a silane coupling agent and a titanate coupling agent.

[0067] In the present invention, the coupling agent is mainly used to improve the bonding force between the inorganic filler (such as the flake nucleating agent) and the organic matrix (such as polyester and ABS), improve the dispersibility and stability of the filler, and improve the mechanical properties, heat resistance and other comprehensive properties of the material by enhancing the interfacial bonding force.

[0068] In some preferred embodiments, the dispersant includes at least one of polyethylene wax, silicone powder and fatty acid ester;

[0069] In the present invention, the dispersant helps to evenly disperse the other components in the polymer matrix to prevent agglomeration and uneven distribution.

[0070] Preferably, the antioxidant includes at least one of antioxidant 1010 and antioxidant 168 .

[0071] In the present invention, the antioxidant can prevent the material from oxidative degradation during high-temperature processing or long-term use, thereby extending the service life of the material.

[0072] In a second aspect, the present invention provides a method for preparing the heat-resistant polyester material, comprising the following steps:

[0073] The thermoplastic polymer, flake nucleating agent, polyethylene glycol, compatibilizer, coupling agent, dispersant, antioxidant and optional toner in the formulated amount are mixed, extruded, drawn and granulated in sequence to obtain the heat-resistant polyester material.

[0074] In the present invention, a twin-screw extruder is preferably used to prepare the heat-resistant polyester material, a thermoplastic polymer is added through the main feed port, and a flaky nucleating agent, polyethylene glycol, a compatibilizer, a coupling agent, a dispersant, and an antioxidant are added through the side feed port. In addition, a colorant can be added according to product requirements. The above raw materials can be melt-blended, extruded, drawn, and pelletized in an extruder to prepare a heat-resistant polyester material.

[0075] In a third aspect, the present invention provides an application of the heat-resistant polyester material or the heat-resistant polyester material prepared by the preparation method in the preparation of polyester tableware.

[0076] In the present invention, the preparation of polyester tableware also includes: injecting the heat-resistant polyester material through an injection molding machine to prepare tableware products with a crystallinity of more than 30%, the tableware has a heat resistance of more than 100°C and excellent mechanical properties.

[0077] The heat-resistant polyester material provided by the invention can replace the existing melamine resin and be used for manufacturing tableware such as hot drink cups, bowls, plates, lunch boxes, etc.

[0078] The present invention is further described below by way of examples. Unless otherwise specified, the materials in the examples are prepared according to existing methods or directly purchased from the market.

[0079] Example 1

[0080] This embodiment provides a heat-resistant polyester material, which includes the following components by weight percentage:

[0081] 35% PET, 25% ABS resin, 34% talc powder (diameter-thickness ratio 25.6), 0.5% PEG400, 4% methacrylate modified ABS, 0.3% silane coupling agent KH560 (3-glycidyloxypropyltrimethoxysilane), 1% dispersant polyethylene wax and 0.1% antioxidant 1010 (tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester), 0.1% antioxidant 168 (tris[2.4-di-tert-butylphenyl] phosphite).

[0082] Example 2

[0083] This embodiment provides a heat-resistant polyester material, which is different from Embodiment 1 in that:

[0084] 30% PET, 30% ABS resin, and the remaining components and proportions are consistent with those in Example 1.

[0085] Example 3

[0086] This embodiment provides a heat-resistant polyester material, which is different from Embodiment 1 in that:

[0087] 40% PET, 20% ABS resin, and the remaining components and proportions are consistent with those in Example 1.

[0088] Example 4

[0089] This embodiment provides a heat-resistant polyester material, which includes the following components by weight percentage:

[0090] 35% PET, 20% ABS resin, 30% flake nucleating agent mica (diameter-thickness ratio 20), 1% PEG2000, 5% maleic anhydride modified ABS, 2% silane coupling agent KH560 (3-glycidyloxypropyltrimethoxysilane), 5% dispersant silicone powder and 1% antioxidant 1010 (tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester), 1% antioxidant 168 (tris[2.4-di-tert-butylphenyl] phosphite).

[0091] Example 5

[0092] This embodiment provides a heat-resistant polyester material, which includes the following components by weight percentage:

[0093] 35% PBT, 25% ABS resin, 35% flake nucleating agent montmorillonite (diameter-thickness ratio 28), 0.2% PEG6000, 3% methacrylic acid modified ABS, 0.1% titanate coupling agent (specifically tetrabutyl titanate), 0.1% dispersant fatty acid ester and 0.1% antioxidant 1010 (pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate).

[0094] Example 6

[0095] This embodiment provides a heat-resistant polyester material, which includes the following components by weight percentage:

[0096] 45% PET, 15% ABS resin, 36% talc powder (diameter-thickness ratio 25.6), 1.5% PEG400, 1% methacrylate modified ABS, 0.3% silane coupling agent KH560 (3-glycidyloxypropyltrimethoxysilane), 1% dispersant polyethylene wax and 0.1% antioxidant 1010 (tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester), 0.1% antioxidant 168 (tris[2.4-di-tert-butylphenyl] phosphite).

[0097] Example 7

[0098] This embodiment provides a heat-resistant polyester material, which is different from Embodiment 6 in that:

[0099] 25% PET, 35% ABS resin, and the remaining components and proportions are consistent with those in Example 6.

[0100] Example 8

[0101] This embodiment provides a heat-resistant polyester material, which is different from Embodiment 1 in that:

[0102] No ABS resin, 60% PET, other components and proportions are consistent with Example 1.

[0103] Example 9

[0104] This embodiment provides a heat-resistant polyester material, which is different from the embodiment 1 in that 0.2% of toner titanium dioxide and 34.8% of PET are added, and the remaining components and proportions are consistent with those in the embodiment 1.

[0105] Examples 10-18

[0106] Embodiments 10-18 provide a method for preparing a heat-resistant polyester material. Embodiments 10-18 respectively use the formula amounts of the raw material components in Embodiments 1-9. The preparation method specifically comprises the following steps:

[0107] (1) After drying the formulated polyester at 160° C. for 4 hours, the polyester was added to the main feed port of a twin-screw extruder;

[0108] (2) After drying the formulated amount of ABS resin at 85° C. for 4 h, the resin was added to the main feed port of a twin-screw extruder;

[0109] (3) After uniformly mixing the formulated amount of flake nucleating agent, polyethylene glycol, compatibilizer, coupling agent, dispersant and antioxidant, the mixture is added to the side feed port of a twin-screw extruder, and the extrusion temperature is controlled at 260-270° C. The heat-resistant polyester material can be prepared by melt blending, extrusion, drawing and granulation.

[0110] Wherein, the formulation in Example 17 does not contain ABS resin, and therefore step (2) is not performed;

[0111] Among them, the formula in Example 18 also includes colorant titanium dioxide, so in step (3), the colorant titanium dioxide is mixed with a flake nucleating agent, polyethylene glycol, a compatibilizer, a coupling agent, a dispersant, and an antioxidant, and added to the side feed port of the twin-screw extruder.

[0112] Application Examples 1-9

[0113] Application Examples 1-9 respectively use the heat-resistant polyester materials prepared in Examples 10-18 to prepare polyester tableware, comprising the following steps:

[0114] The heat-resistant polyester materials prepared in Examples 10-18 were dried (160° C. / 4 h) and added into an injection molding machine. The injection molding temperature was controlled at 265-275° C. to prepare polyester tableware of Application Examples 1-8, respectively.

[0115] Comparative Example 1

[0116] This comparative example provides a heat-resistant polyester material, which is different from Example 1 in that:

[0117] No compatibilizer, 29% ABS resin, and other components and proportions are consistent with Example 1.

[0118] Comparative Example 2

[0119] This comparative example provides a method for preparing a heat-resistant polyester material, using the raw material formula of comparative example 1, and the preparation method is consistent with that of example 10.

[0120] Comparative application example 1

[0121] Comparative Application Example 1 uses the heat-resistant polyester material prepared in Comparative Example 2 to prepare polyester tableware, and the preparation method is consistent with that of Application Example 1.

[0122] Test Case

[0123] Test method:

[0124] 1. Tensile performance test standard: GB / T 1040-2022;

[0125] 2. Bending performance test standard: GB / T 9341-2008;

[0126] 3. Unnotched impact strength test standard: GB / T 1043-2018, simply supported beam;

[0127] 4. Thermal deformation temperature test standard: GB / T 1634-2019, load 1.8Mpa;

[0128] 5. Oxygen permeability test standard: GB / T 31354;

[0129] 6. Crystallinity test standard: GB / T 19466-2004.

[0130] Test samples: The polyester tableware of Application Examples 1-9 and Comparative Application Example 1 was used as the test samples. The test results are shown in Table 1.

[0131] Table 1

[0132]

[0133] It can be seen from the data in the table that the raw material components of Application Comparative Example 1 do not contain a compatibilizer, and the performance of its tableware is not as good as that of the tableware in Application Examples 1-9; compared with other application examples, the polyester addition amount in Application Examples 1-5 and Application Example 9 is 30-40%, the ABS resin addition amount is 20-30%, the flake nucleating agent addition amount is 30-35%, the polyethylene glycol addition amount is 0.2-1%, and the compatibilizer addition amount is 3-5%. The tableware products not only have good heat resistance and mechanical properties, but also have excellent oxygen barrier properties, and the comprehensive performance is more excellent.

[0134] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A heat-resistant polyester material, characterized in that: The invention comprises the following components: a thermoplastic polymer, a platelet nucleating agent, polyethylene glycol, a compatibilizer, a coupling agent, a dispersant, an antioxidant and an optional toner.

2. The heat-resistant polyester material according to claim 1, characterized in that: The thermoplastic polymer includes at least one of polyester and ABS resin; Preferably, the polyester includes at least one of PET and PBT.

3. The heat-resistant polyester material according to claim 2, characterized in that: The following components are included by weight percentage: 10-50% polyester, 5-45% ABS resin, 30-50% flake nucleating agent, 0.1-2% polyethylene glycol, 1-7% compatibilizer, 0.1-2% coupling agent, 0.1-5% dispersant and 0.1-2% antioxidant; Preferably, the heat-resistant polyester material comprises the following components by weight percentage: 30-40% polyester, 20-30% ABS resin, 30-35% flake nucleating agent, 0.2-1% polyethylene glycol, 3-5% compatibilizer, 0.1-2% coupling agent, 0.1-5% dispersant and 0.1-2% antioxidant; Preferably, the heat-resistant polyester material further comprises, by weight percentage: 0.1-5% toner; Preferably, the toner includes at least one of titanium dioxide and carbon black.

4. The heat-resistant polyester material according to claim 1, characterized in that: The flake nucleating agent comprises at least one of talc, mica and montmorillonite; Preferably, the aspect ratio of the plate-like nucleating agent is ≥20.

5. The heat-resistant polyester material according to claim 1, characterized in that: The polyethylene glycol includes at least one of PEG400, PEG2000 and PEG6000.

6. The heat-resistant polyester material according to claim 1, characterized in that: The compatibilizer includes at least one of methacrylic acid modified ABS, maleic anhydride modified ABS and glycidyl methacrylate modified ABS.

7. The heat-resistant polyester material according to claim 1, characterized in that: The coupling agent includes at least one of a silane coupling agent and a titanate coupling agent.

8. The heat-resistant polyester material according to claim 1, characterized in that: The dispersant includes at least one of polyethylene wax, silicone powder and fatty acid ester; The antioxidant includes at least one of the antioxidant 1010 and the antioxidant 168 .

9. The method for preparing a heat-resistant polyester material according to any one of claims 1 to 8, characterized in that: The following steps are involved: The thermoplastic polymer, flake nucleating agent, polyethylene glycol, compatibilizer, coupling agent, dispersant, antioxidant and optional toner in the formulated amount are mixed, extruded, drawn and granulated in sequence to obtain the heat-resistant polyester material.

10. Use of the heat-resistant polyester material according to any one of claims 1 to 8 or the heat-resistant polyester material prepared by the preparation method according to claim 9 in preparing polyester tableware.

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