Composite tpe material and method for producing the same

Abstract

The present application relates to a kind of composite TPE material and its preparation method, wherein composite TPE material, with mass fraction, include the following components: 30-60 parts of thermoplastic elastomer, 20-40 parts of reinforcing polar plastic, 20-40 parts of plasticizer and 0.5-2 parts of compatibilizer, reinforcing polar plastic includes the glass fiber of mass fraction 30-40%.Above-mentioned composite TPE material, reinforcing polar plastic and glass fiber have preferable wetting, reinforcing polar plastic can be fully soaked glass fiber material to prevent the aggregation and contact of glass fiber, the position of aggregation and contact is easy to fracture growth when subjected to external force, cause the reduction of material tensile property;Reinforcing polar plastic containing high mass fraction of glass fiber can be inserted between reinforcing polar plastic and thermoplastic elastomer to form physical mosaic structure in extrusion process to further prevent the delamination of two kinds of materials, so as to improve the tensile strength of composite TPE material.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of thermoplastic elastomer, in particular to a composite TPE material and a preparation method thereof. BACKGROUND

[0002] Thermoplastic elastomer, also known as TPE material, is a multifunctional polymer with both the elasticity of rubber and the plasticity of plastic, which can be produced by injection molding, extrusion and other processing technologies. It is considered to be the latest material to replace traditional rubber and is also a green and environmentally friendly material. However, the tensile strength of TPE material is relatively low, and it is easy to deform or even break under external pressure, so it is necessary to enhance the tensile strength of TPE material.

[0003] Adding rigid materials such as silica and glass fibers to high molecular polymers generally helps to improve the hardness of high molecular polymers, but the improvement of the tensile strength of TPE has two sides. When the usage amount is relatively low, the composite structure formed by the rigid material and the TPE material helps to improve the tensile strength of the material, and when the usage amount is relatively high, the rigid material cannot be fully infiltrated by the TPE and local aggregation areas are generated, which causes the material to be easy to break at the area under external force, and the tensile strength of the composite material of the rigid material and the TPE is actually reduced.

[0004] Therefore, it is necessary to provide a composite TPE material and a preparation method thereof. SUMMARY

[0005] In order to solve the problem of low tensile strength of the composite PTE material, it is necessary to provide a composite TPE material and a preparation method thereof.

[0006] The first aspect of the present application provides a composite TPE material, which comprises the following components in mass fraction: 30-60 parts of thermoplastic elastomer, 20-40 parts of reinforced polar plastic, 20-40 parts of plasticizer and 0.5-2 parts of compatibilizer, and the reinforced polar plastic comprises 30-40% of glass fiber in mass fraction.

[0007] The reinforced polar plastic and the glass fiber have better wettability, the reinforced polar plastic can fully infiltrate the glass fiber material to prevent the aggregation and contact of the glass fiber, the position of the aggregation and contact of the glass fiber is prone to fracture growth when subjected to external force, resulting in the reduction of the tensile strength of the material; the reinforced polar plastic containing a high mass fraction of glass fiber can be inserted between the reinforced polar plastic and the thermoplastic elastomer to form a physical embedding structure to further prevent the delamination of the two materials, thereby improving the tensile strength of the composite TPE material; the glass fiber enriched in the reinforced polar plastic does not affect the flowability of the thermoplastic elastomer, so that the melt can maintain better flowability during the extrusion process, so that the reinforced polar plastic and the glass fiber can be uniformly distributed in the composite TPE material, thereby having improved tensile strength.

[0008] Further, the average length of the glass fiber is 3-10mm. If the length of the glass fiber is too short, it is difficult to produce the insertion effect between the reinforced polar plastic and the thermoplastic elastomer; if the length of the glass fiber is too long, it may affect the flowability of the melt during extrusion.

[0009] Further, the average length of the glass fiber is 6mm. The glass fiber with the above length can obtain better tensile strength.

[0010] Further, the thermoplastic elastomer is a styrene-based TPE.

[0011] Further, the reinforced polar plastic comprises at least one of PVC and PA.

[0012] Further, the plasticizer comprises at least one of DBP (dibutyl phthalate) and DOP (dioctyl phthalate).

[0013] Further, the components include 50 parts of thermoplastic elastomer A, 30 parts of reinforced polar plastic and 30 parts of plasticizer by mass fraction, and the reinforced polar plastic contains 40% of glass fiber by mass fraction. The composite TPE material prepared by the above formula has better tensile strength.

[0014] The second aspect of the application provides a preparation method of the above-mentioned composite TPE material, comprising the following steps: weighing various components according to the formula and transferring them to a mixer for mixing, and then extruding and granulating through a double-screw extruder to obtain the composite TPE material.

[0015] The above preparation method can obtain a composite TPE material with better tensile strength.

[0016] Further, the extrusion temperature is 180-200℃.

[0017] Further, the method for preparing the reinforced polar plastic comprises: mixing the polar plastic with the glass fiber, and then extruding and granulating to form the reinforced polar plastic. DETAILED DESCRIPTION

[0018] For the purpose of promoting the understanding and comprehension of the present application, a more complete description of the present application will be provided below. The present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, the embodiments are provided to make the disclosure of the present application more thorough and comprehensive.

[0019] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited. In the description of the present application, the meaning of "several" is at least one, such as one, two, etc., unless otherwise specifically limited.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is only for the purpose of describing specific embodiments of the application and is not intended to limit the application. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.

[0021] In the present application, the technical features described in an open manner include both the closed technical solutions consisting of the listed features and the open technical solutions containing the listed features.

[0022] In the present application, when referring to a numerical interval, the numerical interval is considered to be continuous and includes the minimum value and the maximum value of the range and each value between the minimum value and the maximum value, unless otherwise specified. Further, when the range refers to an integer, each integer between the minimum value and the maximum value of the range is included. In addition, when multiple ranges are provided to describe a feature or a characteristic, the ranges can be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all sub-ranges encompassed therein.

[0023] In the present application, the percentage content, unless otherwise specified, refers to mass percentage for solid-liquid mixing and solid-solid mixing, and refers to volume percentage for liquid-liquid mixing.

[0024] In the present application, the percentage concentration, unless otherwise specified, refers to the final concentration. The final concentration refers to the proportion of the added ingredient in the system after the ingredient is added.

[0025] The temperature parameters in the present application, if not specifically limited, allow both constant temperature treatment and treatment within a certain temperature range. The constant temperature treatment allows fluctuations within the accuracy range controlled by the instrument.

[0026] The "particles" mentioned in the present application, or the substances with defined particle size distribution, are not necessarily spherical in shape, but can also be irregular, and can be primary particles or secondary particles. The particle size of the irregular particles is measured as the average of the maximum diameter and the minimum diameter.

[0027] Example 1: The present example provides a composite TPE material and a method for preparing the same.

[0028] Preparation of reinforced polar plastic: 6 kg of PVC material (Dongguan Kemai KM-1020) is mixed with 4 kg of glass fiber material (average length 3 mm, average diameter 20 μm), and extruded at 180°C in an extruder to form reinforced polar plastic particles with an average particle size of 1 mm.

[0029] Composite TPE material formulation: 6 kg of styrene TPE (Mitsui Chemical J2060 BK), 4 kg of reinforced polar plastic particles, 4 kg of plasticizer DBP, 0.2 kg of compatibilizer MAH-g-PP (Jiaiyirong CMG9801, same below), and 0.05 kg of silicone-based wetting agent tech-2734 (Shanghai Tech, same below).

[0030] Preparation of composite TPE material: The components are weighed according to the above formulation and transferred to a mixer for mixing, and then extruded and granulated through a twin-screw extruder to obtain a composite TPE material, with an extrusion temperature of 190°C.

[0031] Example 2: The present example provides a composite TPE material and a method for preparing the same.

[0032] Preparation of reinforced polar plastic: 6 kg of PVC material (Dongguan Kemai KM-1020) is mixed with 4 kg of glass fiber material (average length 3 mm, average diameter 20 μm), and extruded at 180°C in an extruder to form reinforced polar plastic particles with an average particle size of 1 mm.

[0033] Composite TPE material formulation: 3 kg of styrene TPE (Mitsui Chemical J2060 BK), 2 kg of reinforced polar plastic particles, 2 kg of plasticizer DBP, 0.05 kg of compatibilizer MAH-g-PP, and 0.03 kg of silicone-based wetting agent tech-2734.

[0034] Composite TPE material preparation: the components were weighed according to the above formula and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain a composite TPE material, with an extrusion temperature of 200°C.

[0035] Example 3: The present example provides a composite TPE material and a method for preparing the same.

[0036] Reinforced polar plastic preparation: 6 kg of PVC material (Dongguan Kemai KM-1020) was mixed with 3 kg of glass fiber material (average length 10 mm, average diameter 20 μm), and extruded at an extruder temperature of 180°C to form reinforced polar plastic particles with an average particle size of 1 mm.

[0037] Composite TPE material formula: 6 kg of styrene TPE (Mitsui Chemical J2060 BK), 4 kg of reinforced polar plastic particles, 4 kg of plasticizer DBP, 0.2 kg of compatibilizer MAH-g-PP, and 0.05 kg of silicone-based wetting agent tech-2734.

[0038] Composite TPE material preparation: the components were weighed according to the above formula and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain a composite TPE material, with an extrusion temperature of 190°C.

[0039] Example 4: The present example provides a composite TPE material and a method for preparing the same.

[0040] Reinforced polar plastic preparation: 6 kg of PVC material (Dongguan Kemai KM-1020) was mixed with 4 kg of glass fiber material (average length 6 mm, average diameter 20 μm), and extruded at an extruder temperature of 180°C to form reinforced polar plastic particles with an average particle size of 1 mm.

[0041] Composite TPE material formula: 6 kg of styrene TPE (Mitsui Chemical J2060 BK), 4 kg of reinforced polar plastic particles, 4 kg of plasticizer DBP, 0.2 kg of compatibilizer MAH-g-PP, and 0.05 kg of silicone-based wetting agent tech-2734.

[0042] Composite TPE material preparation: the components were weighed according to the above formula and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain a composite TPE material, with an extrusion temperature of 190°C.

[0043] Example 5: The present example provides a composite TPE material and a method for preparing the same.

[0044] Reinforced polar plastic preparation: 6 kg of PVC material (Dongguan Kemai KM-1020) was mixed with 4 kg of glass fiber material (average length 6 mm, average diameter 20 pm) and extruded at 180 °C in an extruder to form reinforced polar plastic particles with an average particle size of 1 mm.

[0045] Composite TPE material formulation: 5 kg of styrene TPE (Mitsui Chemical J2060 BK), 3 kg of reinforced polar plastic particles, 3 kg of plasticizer DBP, 0.2 kg of compatibilizer MAH-g-PP, and 0.05 kg of silicone-based wetting agent tech-2734.

[0046] Composite TPE material preparation: The components were weighed according to the above formulation and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain the composite TPE material, with an extrusion temperature of 190 °C.

[0047] Comparative Example 1: This comparative example provides a TPE material and a method for preparing the same.

[0048] TPE material formulation: 6 kg of styrene TPE (Mitsui Chemical J2060 BK), 2 kg of plasticizer DBP, and 0.05 kg of silicone-based wetting agent tech-2734.

[0049] TPE material preparation: The components were weighed according to the above formulation and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain the TPE material, with an extrusion temperature of 190 °C.

[0050] Comparative Example 2: This comparative example provides a TPE material and a method for preparing the same.

[0051] TPE material formulation: 6 kg of styrene TPE (Mitsui Chemical J2060 BK), 2 kg of plasticizer DBP, 0.6 kg of glass fiber (same as the material of Example 1), and 0.05 kg of silicone-based wetting agent tech-2734.

[0052] TPE material preparation: The components were weighed according to the above formulation and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain the TPE material, with an extrusion temperature of 190 °C.

[0053] Comparative Example 3: This comparative example provides a TPE material and a method for preparing the same.

[0054] TPE material formulation: 6 kg of styrene TPE (Mitsui Chemical J2060 BK), 2 kg of plasticizer DBP, 1.6 kg of glass fiber (same as the material of Example 1), and 0.05 kg of silicone-based wetting agent tech-2734.

[0055] TPE material preparation: the components were weighed according to the above formulation and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain the TPE material, the extrusion temperature was 190°C.

[0056] Comparative Example 4: This comparative example provides a composite TPE material and a method for preparing the same.

[0057] TPE material formulation: 6 kg of styrene TPE (Mitsui Chemical J2060 BK), 2 kg of plasticizer DBP, 2 kg of PVC material, 0.2 kg of compatibilizer MAH-g-PP, and 0.05 kg of silicone-based wetting agent tech-2734.

[0058] TPE material preparation: the components were weighed according to the above formulation and transferred to a mixer for mixing, and then extruded and pelletized by a twin-screw extruder to obtain the composite TPE material, the extrusion temperature was 190°C.

[0059] Tensile property test: the TPE materials of the examples and comparative examples were prepared into samples according to the provisions of type 1BA in ISO 527-2-2012 "Plastics - Determination of tensile properties". The test was carried out at room temperature, the tensile speed was 200 mm / min, 3 sample strips were tested for each sample, the test data was taken as the median value, and table 1 was obtained.

[0060] Table 1: test results of examples 1-5 and comparative examples 1-3.

[0061]

[0062] From the data of Table 1, the data of Examples 1-5 are all better than those of Comparative Examples 1-4, because the composite TPE material of the examples has better wettability of the reinforcing polar plastic and the glass fiber, the reinforcing polar plastic can fully infiltrate the glass fiber material to prevent the aggregation and contact of the glass fiber, the position of the aggregation and contact of the glass fiber is prone to fracture growth when subjected to external force, resulting in the reduction of the tensile property of the material; the reinforcing polar plastic containing a high mass fraction of glass fiber can be inserted between the reinforcing polar plastic and the thermoplastic elastomer during the extrusion process to form a physical interlocking structure to further prevent the delamination of the two materials, thereby improving the tensile strength of the composite TPE material; the glass fiber enriched in the reinforcing polar plastic does not affect the flowability of the thermoplastic elastomer, so the melt can maintain good flowability during the extrusion process, so that the reinforcing polar plastic and the glass fiber can be uniformly distributed in the composite TPE material, thereby having improved tensile strength. Comparative Example 1 does not use glass fiber material, and its tensile property is weak; Comparative Example 2 adds a small amount of glass fiber on the basis of Comparative Example 1 to improve its tensile property, then when Comparative Example 3 further increases the addition amount of glass fiber, the tensile property of Comparative Example 3 is reduced instead, because it uses an excessive amount of glass fiber, the wettability of the glass fiber and the thermoplastic elastomer is poor, and local aggregation is prone to occur, so that fracture is prone to occur at the aggregation site under the action of external force. The application solves this problem by using the reinforcing polar plastic; Comparative Example 4 does not use the polar plastic containing glass fiber, and the compatibility of the polar plastic and the thermoplastic elastomer is poor, and phase separation is prone to occur, resulting in that the tensile property cannot be greatly improved.

[0063] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered within the scope of the present disclosure.

[0064] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be noted that for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A composite TPE material, characterized in that, The composite TPE material comprises the following components in mass fraction: 30-60 parts of thermoplastic elastomer, 20-40 parts of reinforced polar plastic, 20-40 parts of plasticizer and 0.5-2 parts of compatibilizer, the reinforced polar plastic comprises 30-40% of glass fiber in mass fraction, the average length of the glass fiber is 3-10 mm, the thermoplastic elastomer is styrene-based TPE, the reinforced polar plastic comprises PVC, and the preparation method of the reinforced polar plastic comprises the following steps: mixing the polar plastic PVC with the glass fiber and then extruding and granulating to form the reinforced polar plastic.

2. The composite TPE material of claim 1, wherein, The average length of the glass fiber is 6 mm.

3. The composite TPE material of claim 1, wherein, The plasticizer is selected from at least one of DBP and DOP.

4. The composite TPE material of claim 1, wherein, The composite TPE material comprises the following components in mass fraction: 50 parts of thermoplastic elastomer, 30 parts of reinforced polar plastic, 30 parts of plasticizer and 2 parts of compatibilizer, and the reinforced polar plastic comprises 40% of glass fiber in mass fraction.

5. The method for preparing the composite TPE material according to any one of claims 1-4, characterized in that, The composite TPE material comprises the following steps: weighing various components according to the formula and transferring them into a mixer for mixing, and then extruding and granulating through a double-screw extruder to obtain the composite TPE material.

6. The production method according to claim 5, wherein The extrusion temperature is 180-200 ℃.

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