CN116970225A - Thermoplastic foaming material and preparation method thereof - Google Patents
Thermoplastic foaming material and preparation method thereof Download PDFInfo
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- CN116970225A CN116970225A CN202311043930.0A CN202311043930A CN116970225A CN 116970225 A CN116970225 A CN 116970225A CN 202311043930 A CN202311043930 A CN 202311043930A CN 116970225 A CN116970225 A CN 116970225A
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- 239000000463 material Substances 0.000 title claims abstract description 86
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 80
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 80
- 238000005187 foaming Methods 0.000 title abstract description 58
- 238000002360 preparation method Methods 0.000 title abstract description 32
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 270
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 122
- 239000000203 mixture Substances 0.000 claims abstract description 92
- 239000005062 Polybutadiene Substances 0.000 claims abstract description 37
- 229920002857 polybutadiene Polymers 0.000 claims abstract description 37
- 229920005989 resin Polymers 0.000 claims abstract description 35
- 239000011347 resin Substances 0.000 claims abstract description 35
- 239000006261 foam material Substances 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims description 23
- 238000001125 extrusion Methods 0.000 claims description 19
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 238000001746 injection moulding Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 230000003078 antioxidant effect Effects 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 11
- 239000003963 antioxidant agent Substances 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 2
- 239000008187 granular material Substances 0.000 claims 1
- 229920001971 elastomer Polymers 0.000 abstract description 2
- 239000000806 elastomer Substances 0.000 abstract description 2
- 230000006750 UV protection Effects 0.000 description 17
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 13
- 239000000843 powder Substances 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 239000008188 pellet Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 4
- 239000005038 ethylene vinyl acetate Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 229920003052 natural elastomer Polymers 0.000 description 4
- 229920001194 natural rubber Polymers 0.000 description 4
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000004793 Polystyrene Substances 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920005669 high impact polystyrene Polymers 0.000 description 1
- 239000004797 high-impact polystyrene Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/32—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof from compositions containing microballoons, e.g. syntactic foams
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/22—Expandable microspheres, e.g. Expancel®
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/06—Flexible foams
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2309/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2391/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2400/00—Characterised by the use of unspecified polymers
- C08J2400/26—Elastomers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2409/00—Characterised by the use of homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/16—Homopolymers or copolymers of alkyl-substituted styrenes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2491/00—Characterised by the use of oils, fats or waxes; Derivatives thereof
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application discloses a thermoplastic foaming material and a preparation method thereof, relates to the technical field of elastomer materials, and aims to solve the problem that the quality of a shoe product in the prior art is heavy. The thermoplastic foam material comprises a thermoplastic elastomer composition, wherein the thermoplastic elastomer composition comprises a thermoplastic elastomer premix and an expanding agent uniformly filled in the thermoplastic elastomer premix, and the thermoplastic elastomer premix comprises a thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin and an antiwear agent. The preparation method is used for preparing the thermoplastic foaming material. The thermoplastic foaming material and the preparation method provided by the application are used for producing shoes, and have light weight and good wear resistance.
Description
Technical Field
The application relates to the technical field of elastomer materials, in particular to a thermoplastic foaming material and a preparation method thereof.
Background
Materials that are currently suitable for use in the production of footwear are natural rubber, polyurethane, thermoplastic elastomers, and the like. The shoes made of natural rubber have the advantages of strong rebound resilience and good wear resistance, but have a plurality of processing procedures, and the products and the production waste materials cannot be recycled. The sole made of polyurethane has low wear resistance and high rebound resilience compared with other materials, but the manufacturing process is strictly controlled, and meanwhile, the density of the produced product is high, and the formed product is heavy. The general thermoplastic elastomer has simple manufacturing process and low cost, and the waste materials generated in the manufacturing process can be recycled, but the density difference of the product is difficult to meet the requirements of certain specific products.
Disclosure of Invention
The application aims to provide a thermoplastic foaming material and a preparation method thereof, and footwear produced by using the thermoplastic foaming material has light weight and good wear resistance.
In a first aspect, the present application provides a thermoplastic foam comprising a thermoplastic elastomer composition comprising a thermoplastic elastomer premix comprising a thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin, and an antiwear agent, and an expanding agent homogeneously filled within the thermoplastic elastomer premix.
Compared with the prior art, the thermoplastic foaming material provided by the application has the following advantages:
the thermoplastic foaming material provided by the embodiment of the application comprises a thermoplastic elastomer composition, wherein the thermoplastic elastomer composition comprises a thermoplastic elastomer premix and an expanding agent uniformly filled in the thermoplastic elastomer premix. Wherein the thermoplastic elastomer premix comprises a thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin, and an antiwear agent. When polybutadiene is added to the thermoplastic elastomer, the polybutadiene can react with the thermoplastic elastomer, so that the appearance of the thermoplastic elastomer can be changed, and the finally formed thermoplastic foam material has a hazy effect. Meanwhile, the wear-resistant agent is added into the thermoplastic elastomer, so that the finally-formed thermoplastic foaming material has good wear resistance, and when the foaming material is used for preparing the footwear product, the product with better wear resistance can be obtained, and the service life of the footwear product can be prolonged. In addition, when the expanding agent is uniformly filled in the thermoplastic elastomer premix, the finally prepared thermoplastic foaming material has very low density, so that the density of the thermoplastic foaming material can be reduced, and when the foaming material is used for preparing a shoe product, the lightweight and wear-resistant shoe can be obtained, and the comfort level is improved. In addition, the thermoplastic elastomer premix of the embodiment of the application further comprises naphthenic oil and tackifying resin, wherein the naphthenic oil can improve the flowability of the thermoplastic elastomer in the preparation process, and the tackifying resin can improve the viscosity of the thermoplastic elastomer, so that the viscosity of the thermoplastic elastomer premix reaches a proper range.
From the above, the thermoplastic foaming material provided by the application has the advantages that the footwear produced by using the thermoplastic foaming material has light weight and good wear resistance.
In a second aspect, the present application also provides a method for preparing a thermoplastic foam material, comprising:
pouring the thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin and wear-resistant agent into a double-screw injection molding machine for mixing and stirring to obtain a thermoplastic elastomer premix;
adding an expanding agent into a side feeding device of the double-screw extruder for feeding, so that the expanding agent and the thermoplastic elastomer premix are uniformly mixed to obtain a thermoplastic elastomer composition;
the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
Compared with the prior art, the preparation method of the thermoplastic foaming material has the same beneficial effects as the thermoplastic foaming material of the first aspect, and the description is omitted here.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a flow chart of the preparation of a thermoplastic foam according to an embodiment of the present application;
FIG. 2 is a flow chart of the preparation of a thermoplastic elastomer composition according to an embodiment of the present application;
FIG. 3 is a flow chart of the preparation of a thermoplastic elastomer premix according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.
In the present application, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.
In the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c can be single or multiple.
Footwear is a living necessity for modern people, and materials suitable for producing footwear include natural rubber, polyurethane, thermoplastic elastomers, and the like. The shoes made of natural rubber have the advantages of strong rebound resilience and good wear resistance, but have a plurality of processing procedures, and the products and the production waste materials cannot be recycled. The sole made of polyurethane has low wear resistance and high rebound resilience compared with other materials, but the manufacturing process is strictly controlled, and meanwhile, the density of the produced product is high, and the formed product is heavy. The general thermoplastic elastomer has simple manufacturing process and low cost, and the waste materials generated in the manufacturing process can be recycled, but the density difference of the products is difficult to meet the requirements of certain specific products
Aiming at the problems, the embodiment of the application provides a thermoplastic foaming material and a preparation method thereof, which solve the problem that the quality of the footwear product in the prior art is heavier. Footwear produced from the thermoplastic foam has very light weight and good wear resistance.
The thermoplastic foaming material provided by the embodiment of the application can be used for manufacturing footwear products. Comprising the following steps: a thermoplastic elastomer composition comprising a thermoplastic elastomer premix comprising a thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin, and an antiwear agent, and an expanding agent homogeneously filled within the thermoplastic elastomer premix. It should be understood that the thermoplastic elastomer may include a variety of thermoplastic elastomers, the polybutadiene may be polybutadiene RB-840, the naphthenic oil may be naphthenic oil 60N, the tackifying resin may be resin powder AMS-100, the antiwear agent may be antiwear agent FZ-600, and the expanding agent may be expanding agent F-105D.
The thermoplastic foaming material provided by the embodiment of the application comprises a thermoplastic elastomer composition, wherein the thermoplastic elastomer composition comprises a thermoplastic elastomer premix and an expanding agent uniformly filled in the thermoplastic elastomer premix. Wherein the thermoplastic elastomer premix comprises a thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin, and an antiwear agent. When polybutadiene is added to the thermoplastic elastomer, the polybutadiene can react with the thermoplastic elastomer, so that the appearance of the thermoplastic elastomer can be changed, and the finally formed thermoplastic foam material has a hazy effect. Meanwhile, the wear-resistant agent is added into the thermoplastic elastomer, so that the finally-formed thermoplastic foaming material has good wear resistance, and when the foaming material is used for preparing the footwear product, the product with better wear resistance can be obtained, and the service life of the footwear product can be prolonged.
In addition, when the expanding agent is uniformly filled in the thermoplastic elastomer premix, the finally prepared thermoplastic foaming material has very low density, so that the density of the thermoplastic foaming material can be reduced, and when the foaming material is used for preparing a shoe product, the lightweight and wear-resistant shoe can be obtained, and the comfort level is improved. In addition, the thermoplastic elastomer premix of the embodiment of the application further comprises naphthenic oil and tackifying resin, wherein the naphthenic oil can improve the flowability of the thermoplastic elastomer in the preparation process, and the tackifying resin can improve the viscosity of the thermoplastic elastomer, so that the viscosity of the thermoplastic elastomer premix reaches a proper range.
In one possible implementation, the thermoplastic foam of the embodiments of the present application further includes an antioxidant and an anti-uv agent. The antioxidant may be antioxidant 1076, and the anti-uv agent may be anti-uv agent 1010 or anti-uv agent 201, which are not limited herein. Therefore, the prepared thermoplastic foaming material has good antioxidant property and good ultraviolet resistance by adding the antioxidant and the ultraviolet resistance agent, and the service life of the shoe product is further prolonged.
In an alternative manner, the thermoplastic foam material of the embodiments of the present application includes, in parts by weight: 30 to 35 parts of thermoplastic elastomer, 1 to 2 parts of tackifying resin, 2 to 4 parts of wear-resistant agent, 3 to 5 parts of expanding agent, 30 to 35 parts of polybutadiene, 0.08 to 0.1 part of antioxidant, 0.18 to 0.2 part of ultraviolet resistant agent and 30 to 35 parts of naphthenic oil. Under the proportion, polybutadiene, an antiwear agent, an expanding agent, an antioxidant, an ultraviolet resistance agent and a thermoplastic elastomer can be fully dispersed, so that the prepared thermoplastic foaming material is more uniform in color distribution, and the local wear resistance, the antioxidant and the ultraviolet resistance of the thermoplastic foaming material can achieve good effects and are smaller in density.
In an alternative manner, the thermoplastic elastomer of the embodiment of the present application includes 15 to 20 parts by weight of the first thermoplastic elastomer, 2.5 to 5 parts by weight of the second thermoplastic elastomer, 5 to 7 parts by weight of the third thermoplastic elastomer, and 4 to 6 parts by weight of the fourth thermoplastic elastomer. It should be understood that the first thermoplastic elastomer is thermoplastic elastomer 411, the second thermoplastic elastomer is thermoplastic elastomer 501, the third thermoplastic elastomer is thermoplastic elastomer 4601, and the fourth thermoplastic elastomer is thermoplastic elastomer 1401. The stretch resistance of the thermoplastic foam can be further improved by the four thermoplastic elastomers.
Fig. 1 shows a preparation flow chart of a thermoplastic foaming material provided by the embodiment of the application, and as shown in fig. 1, the application also provides a preparation method of the thermoplastic foaming material, which comprises the following steps:
step 101: pouring the thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin and wear-resistant agent into a double-screw injection molding device for mixing and stirring to obtain the thermoplastic elastomer premix.
Illustratively, after pouring the plurality of thermoplastic elastomers and naphthenic oil into a twin screw injection molding device for mixing and stirring, polybutadiene, naphthenic oil, tackifying resin and wear-resistant agent are added for continuous mixing, and all the mixture is stirred for 5min and is left for 10min, so as to obtain the thermoplastic elastomer premix.
Step 102: and adding the expanding agent into a side feeding device of the double-screw extruder for feeding, so that the expanding agent and the thermoplastic elastomer premix are uniformly mixed, and obtaining the thermoplastic elastomer composition.
Illustratively, the expansion agent F-105D was added to the side feed device of the twin-screw extruder, and the side feed speed was set to 2% so that the expansion agent was uniformly mixed with the thermoplastic elastomer premix to obtain a thermoplastic elastomer composition.
According to the embodiment of the application, the expansion agent is fed into the thermoplastic elastomer premix by using the double-screw extruder, and the feeding speed is set to be 2%, and because the thermoplastic elastomer premix is in a sticky state and the expansion agent discharged from the feeding device is in a solid state, when the solid expansion agent is continuously fed into the sticky thermoplastic elastomer premix uniformly, the expansion agent can be filled into the thermoplastic elastomer premix in a solid state, so that the prepared thermoplastic foaming material has a small density.
Step 103: the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
Illustratively, the twin-screw extrusion device is a segmented extrusion device, and the working conditions of the twin-screw extrusion device include: the temperature of the twin-screw extrusion device is: the first section is at room temperature, the second section is 60-65 ℃, the third section is 100-105 ℃, the fourth section is 120-125 ℃, the fifth section is 140-141 ℃, the sixth section is 145-146 ℃, the seventh section is 150-151 ℃, the eighth section is 150-151 ℃, the ninth section is 145-146 ℃, the tenth section is 140-141 ℃, the eleventh section is 125-126 ℃, the twelfth section is 125-126 ℃, the rotating speed of the twin-screw extrusion device is 150-180 r/min, the feeding speed is 150-180 kg/h, and the cutting speed of the material is 2400-2600 r/min.
In one possible implementation, FIG. 2 shows a flow chart of the preparation of a thermoplastic elastomer composition according to an embodiment of the present application. As shown in fig. 2, after the expanding agent is added to the side feeding device of the twin-screw extruder for feeding so that the expanding agent and the thermoplastic elastomer premix are uniformly mixed, the method further comprises:
step 201: the homogeneously mixed expanding agent and thermoplastic elastomer premix is extruded by a screw into a material pellet storage device and cooled to 50 ℃.
Illustratively, after uniformly mixing the expansion agent with the thermoplastic elastomer premix, the mixture is extruded through a screw into a material pellet storage device and cooled to 50 ℃.
Step 202: and adding an antioxidant and an ultraviolet resistant agent into the cooled expansion agent and thermoplastic elastomer premix to prepare the thermoplastic elastomer composition.
In one implementation, FIG. 3 illustrates a flow chart of the preparation of a thermoplastic elastomer premix according to an embodiment of the present application. As shown in fig. 3, the method for preparing the thermoplastic elastomer premix according to the embodiment of the present application includes:
step 301: and respectively mixing and stirring the first thermoplastic elastomer and the second thermoplastic elastomer with naphthenic oil at normal temperature to obtain a first thermoplastic elastomer mixture and a second thermoplastic elastomer mixture.
For example, the thermoplastic elastomer 411 and the naphthenic oil 1:1 are mixed and stirred at normal temperature, and the thermoplastic elastomer 501 and the naphthenic oil 1:1 are mixed and stirred at normal temperature, and left for 24 hours.
Step 302: and adding the first thermoplastic elastomer mixture, the second thermoplastic elastomer mixture, the third thermoplastic elastomer and the fourth thermoplastic elastomer into a double-screw injection molding machine for stirring to obtain the third thermoplastic elastomer mixture.
For example: the mixture of the thermoplastic elastomer 411, the mixture of the thermoplastic elastomer 501, the other third thermoplastic elastomer 4601 and the fourth thermoplastic elastomer 1401 are poured into a double-screw injection molding machine to be stirred, and a third thermoplastic elastomer mixture is obtained.
Step 303: polybutadiene, tackifying resin, antiwear agent and naphthenic oil are added to the third thermoplastic elastomer mixture to obtain a thermoplastic elastomer premix.
For example: polybutadiene RB-840, an antiwear agent FZ-600, resin powder AMS-100, and naphthenic oil 60N were added to the third thermoplastic elastomer mixture to obtain a thermoplastic elastomer premix.
The thermoplastic foaming material provided by the embodiment of the application comprises a thermoplastic elastomer composition, wherein the thermoplastic elastomer composition comprises a thermoplastic elastomer premix and an expanding agent uniformly filled in the thermoplastic elastomer premix. Wherein the thermoplastic elastomer premix comprises a thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin, and an antiwear agent. When polybutadiene is added to the thermoplastic elastomer, the polybutadiene can react with the thermoplastic elastomer, so that the appearance of the thermoplastic elastomer can be changed, and the finally formed thermoplastic foam material has a hazy effect. Meanwhile, the wear-resistant agent is added into the thermoplastic elastomer, so that the finally-formed thermoplastic foaming material has good wear resistance, and when the foaming material is used for preparing the footwear product, the product with better wear resistance can be obtained, and the service life of the footwear product can be prolonged. In addition, when the expanding agent is uniformly filled in the thermoplastic elastomer premix, the finally prepared thermoplastic foaming material has very low density, so that the density of the thermoplastic foaming material can be reduced, and when the foaming material is used for preparing a shoe product, the lightweight and wear-resistant shoe can be obtained, and the comfort level is improved. In addition, the thermoplastic elastomer premix of the embodiment of the application further comprises naphthenic oil and tackifying resin, wherein the naphthenic oil can improve the flowability of the thermoplastic elastomer in the preparation process, and the tackifying resin can improve the viscosity of the thermoplastic elastomer, so that the viscosity of the thermoplastic elastomer premix reaches a proper range.
In order to verify the effect of the thermoplastic foaming material provided in the examples of the present application, the examples of the present application are demonstrated in a manner of comparing the examples with comparative examples.
Example 1
The thermoplastic foaming material provided by the embodiment of the application comprises the following components in parts by mass: 17 parts by weight of a thermoplastic elastomer 411, 3 parts by weight of a thermoplastic elastomer 501, 5.5 parts by weight of a thermoplastic elastomer 4601, 4.5 parts by weight of a thermoplastic elastomer 1401, 3.5 parts by weight of an expanding agent F-105D, 31 parts by weight of polybutadiene RB-840, 2.5 parts by weight of an antiwear agent FZ-600, 1.3 parts by weight of a resin powder AMS-100, 33.5 parts by weight of naphthenic oil 60N, 0.09 parts by weight of an antioxidant 1076, and 0.19 parts by weight of an ultraviolet resistance agent 1010.
The preparation method of the thermoplastic foaming material provided by the embodiment of the application comprises the following steps:
in a first step, preparation of a thermoplastic elastomer premix: 17 parts by weight of the thermoplastic elastomer 411 and 17 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain a thermoplastic elastomer 411 mixture. 3 parts by weight of the thermoplastic elastomer 501 and 3 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain thermoplastic elastomer 501 mixtures, which were left for 24 hours. Then, the thermoplastic elastomer 411 mixture and the thermoplastic elastomer 501 mixture were poured into a twin-screw injection molding machine with 5.5 parts by weight of the thermoplastic elastomer 4601 and 4.5 parts by weight of the thermoplastic elastomer 1401 and stirred. Then 31 parts by weight of polybutadiene RB-840, 2.5 parts by weight of wear-resistant agent FZ-600, 1.3 parts by weight of resin powder AMS-100, 13.5 parts by weight of naphthenic oil 60N were added, and all the mixtures were stirred for 5min and left standing for 10min to obtain a thermoplastic elastomer premix.
In a second step, the thermoplastic elastomer composition is prepared: 3.5 parts by weight of an expanding agent F-105D was added to a side feeding device of a twin-screw extruder, and the side feeding speed was set to 2% so that the expanding agent and the thermoplastic elastomer premix were uniformly mixed, the uniformly mixed expanding agent and thermoplastic elastomer premix were extruded by a screw into a material pellet storage device, cooled to 50 ℃, and 0.09 parts by weight of an antioxidant 1076 and 0.19 parts by weight of an ultraviolet resistance agent 1010 were added to the cooled expanding agent and thermoplastic elastomer premix to prepare a thermoplastic elastomer composition. The temperature of the twin-screw extrusion device is: the first section is at room temperature, the second section is 60-65 ℃, the third section is 100-105 ℃, the fourth section is 120-125 ℃, the fifth section is 140-141 ℃, the sixth section is 145-146 ℃, the seventh section is 150-151 ℃, the eighth section is 150-151 ℃, the ninth section is 145-146 ℃, the tenth section is 140-141 ℃, the eleventh section is 125-126 ℃, and the twelfth section is 125-126 ℃. The rotating speed is 150-180 r/min, the feeding speed is 150-180 kg/h, and the cutting speed of the material is 2400-2600 r/min.
Thirdly, preparing a thermoplastic foaming material: the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
Example two
The thermoplastic foaming material provided by the embodiment of the application comprises the following components in parts by mass: 20 parts by weight of a thermoplastic elastomer 411, 5 parts by weight of a thermoplastic elastomer 501, 5 parts by weight of a thermoplastic elastomer 4601, 4 parts by weight of a thermoplastic elastomer 1401, 5 parts by weight of an expanding agent F-105D, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of a resin powder AMS-100, 30 parts by weight of naphthenic oil 60N, 0.08 part by weight of an antioxidant 1076, and 0.18 part by weight of an ultraviolet resistance agent 1010.
The preparation method of the thermoplastic foaming material provided by the embodiment II of the application comprises the following steps:
in a first step, preparation of a thermoplastic elastomer premix: 20 parts by weight of the thermoplastic elastomer 411 and 20 parts by weight of the naphthenic oil 60N were mixed and stirred at normal temperature to obtain a thermoplastic elastomer 411 mixture. 5 parts by weight of the thermoplastic elastomer 501 and 5 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain thermoplastic elastomer 501 mixtures, which were left for 24 hours. Then, the thermoplastic elastomer 411 mixture and the thermoplastic elastomer 501 mixture were poured into a twin-screw injection molding machine with 5 parts by weight of the thermoplastic elastomer 4601 and 4 parts by weight of the thermoplastic elastomer 1401 and stirred. Then, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of a resin powder AMS-100, 15 parts by weight of a naphthenic oil 60N were added, and all the mixtures were stirred for 5min and left standing for 10min to obtain a thermoplastic elastomer premix.
In a second step, the thermoplastic elastomer composition is prepared: 5 parts by weight of an expanding agent F-105D was added to a side feeding device of a twin-screw extruder, and the side feeding speed was set to 2%, so that the expanding agent and the thermoplastic elastomer premix were uniformly mixed, the uniformly mixed expanding agent and thermoplastic elastomer premix were extruded by a screw into a material pellet storage device, cooled to 50 ℃, and 0.08 parts by weight of an antioxidant 1076 and 0.18 parts by weight of an ultraviolet resistance agent 1010 were added to the cooled expanding agent and thermoplastic elastomer premix, to prepare a thermoplastic elastomer composition. The temperature of the twin-screw extrusion device is: the first section is at room temperature, the second section is 60-65 ℃, the third section is 100-105 ℃, the fourth section is 120-125 ℃, the fifth section is 140-141 ℃, the sixth section is 145-146 ℃, the seventh section is 150-151 ℃, the eighth section is 150-151 ℃, the ninth section is 145-146 ℃, the tenth section is 140-141 ℃, the eleventh section is 125-126 ℃, and the twelfth section is 125-126 ℃. The rotating speed is 150-180 r/min, the feeding speed is 150-180 kg/h, and the cutting speed of the material is 2400-2600 r/min.
Thirdly, preparing a thermoplastic foaming material: the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
Example III
The thermoplastic foaming material provided by the embodiment of the application comprises the following components in parts by mass: 15 parts by weight of a thermoplastic elastomer 411, 2.5 parts by weight of a thermoplastic elastomer 501, 5 parts by weight of a thermoplastic elastomer 4601, 4 parts by weight of a thermoplastic elastomer 1401, 4 parts by weight of an expanding agent F-105D, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of a resin powder AMS-100, 30 parts by weight of naphthenic oil 60N, 0.08 part by weight of an antioxidant 1076, and 0.18 part by weight of an ultraviolet resistance agent 1010.
The preparation method of the thermoplastic foaming material provided by the third embodiment of the application comprises the following steps:
in a first step, preparation of a thermoplastic elastomer premix: 15 parts by weight of the thermoplastic elastomer 411 and 15 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain a thermoplastic elastomer 411 mixture. 2.5 parts by weight of the thermoplastic elastomer 501 and 2.5 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain thermoplastic elastomer 501 mixtures, which were left for 24 hours each. Then, the thermoplastic elastomer 411 mixture and the thermoplastic elastomer 501 mixture were poured into a twin-screw injection molding machine with 5 parts by weight of the thermoplastic elastomer 4601 and 4 parts by weight of the thermoplastic elastomer 1401 and stirred. Then, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of resin powder AMS-100, 12.5 parts by weight of naphthenic oil 60N were added, and all the mixtures were stirred for 5min and left standing for 10min to obtain a thermoplastic elastomer premix.
In a second step, the thermoplastic elastomer composition is prepared: 4 parts by weight of an expanding agent F-105D was added to a side feeding device of a twin-screw extruder, and the side feeding speed was set to 2%, so that the expanding agent and the thermoplastic elastomer premix were uniformly mixed, the uniformly mixed expanding agent and thermoplastic elastomer premix were extruded by a screw into a material pellet storage device, cooled to 50 ℃, and 0.08 parts by weight of an antioxidant 1076 and 0.18 parts by weight of an ultraviolet resistance agent 1010 were added to the cooled expanding agent and thermoplastic elastomer premix, to prepare a thermoplastic elastomer composition. The temperature of the twin-screw extrusion device is: the first section is at room temperature, the second section is 60-65 ℃, the third section is 100-105 ℃, the fourth section is 120-125 ℃, the fifth section is 140-141 ℃, the sixth section is 145-146 ℃, the seventh section is 150-151 ℃, the eighth section is 150-151 ℃, the ninth section is 145-146 ℃, the tenth section is 140-141 ℃, the eleventh section is 125-126 ℃, and the twelfth section is 125-126 ℃. The rotating speed is 150-180 r/min, the feeding speed is 150-180 kg/h, and the cutting speed of the material is 2400-2600 r/min.
Thirdly, preparing a thermoplastic foaming material: the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
Example IV
The thermoplastic foaming material provided by the embodiment of the application comprises the following components in parts by mass: 15 parts by weight of a thermoplastic elastomer 411, 2.5 parts by weight of a thermoplastic elastomer 501, 5 parts by weight of a thermoplastic elastomer 4601, 4 parts by weight of a thermoplastic elastomer 1401, 3.5 parts by weight of an expanding agent F-105D, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of a resin powder AMS-100, 30 parts by weight of naphthenic oil 60N, 0.08 part by weight of an antioxidant 1076, and 0.18 part by weight of an ultraviolet resistance agent 1010.
The preparation method of the thermoplastic foaming material provided by the fourth embodiment of the application comprises the following steps:
in a first step, preparation of a thermoplastic elastomer premix: 15 parts by weight of the thermoplastic elastomer 411 and 15 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain a thermoplastic elastomer 411 mixture. 2.5 parts by weight of the thermoplastic elastomer 501 and 2.5 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain thermoplastic elastomer 501 mixtures, which were left for 24 hours each. Then, the thermoplastic elastomer 411 mixture and the thermoplastic elastomer 501 mixture were poured into a twin-screw injection molding machine with 5 parts by weight of the thermoplastic elastomer 4601 and 4 parts by weight of the thermoplastic elastomer 1401 and stirred. Then, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of resin powder AMS-100, 12.5 parts by weight of naphthenic oil 60N were added, and all the mixtures were stirred for 5min and left standing for 10min to obtain a thermoplastic elastomer premix.
In a second step, the thermoplastic elastomer composition is prepared: 3.5 parts by weight of an expanding agent F-105D was added to a side feeding device of a twin-screw extruder, and the side feeding speed was set to 2% so that the expanding agent and the thermoplastic elastomer premix were uniformly mixed, the uniformly mixed expanding agent and thermoplastic elastomer premix were extruded by a screw into a material pellet storage device, cooled to 50 ℃, and 0.08 parts by weight of an antioxidant 1076 and 0.18 parts by weight of an ultraviolet resistance agent 1010 were added to the cooled expanding agent and thermoplastic elastomer premix to prepare a thermoplastic elastomer composition. The temperature of the twin-screw extrusion device is: the first section is at room temperature, the second section is 60-65 ℃, the third section is 100-105 ℃, the fourth section is 120-125 ℃, the fifth section is 140-141 ℃, the sixth section is 145-146 ℃, the seventh section is 150-151 ℃, the eighth section is 150-151 ℃, the ninth section is 145-146 ℃, the tenth section is 140-141 ℃, the eleventh section is 125-126 ℃, and the twelfth section is 125-126 ℃. The rotating speed is 150-180 r/min, the feeding speed is 150-180 kg/h, and the cutting speed of the material is 2400-2600 r/min.
Thirdly, preparing a thermoplastic foaming material: the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
Example five
The thermoplastic foaming material provided by the embodiment of the application comprises the following components in parts by mass: 15 parts by weight of a thermoplastic elastomer 411, 2.5 parts by weight of a thermoplastic elastomer 501, 5 parts by weight of a thermoplastic elastomer 4601, 4 parts by weight of a thermoplastic elastomer 1401, 3 parts by weight of an expanding agent F-105D, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of a resin powder AMS-100, 30 parts by weight of naphthenic oil 60N, 0.08 part by weight of an antioxidant 1076, and 0.18 part by weight of an ultraviolet resistance agent 1010.
The preparation method of the thermoplastic foaming material provided by the fifth embodiment of the application comprises the following steps:
in a first step, preparation of a thermoplastic elastomer premix: 15 parts by weight of the thermoplastic elastomer 411 and 15 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain a thermoplastic elastomer 411 mixture. 2.5 parts by weight of the thermoplastic elastomer 501 and 2.5 parts by weight of the naphthenic oil 60N were mixed and stirred at room temperature to obtain thermoplastic elastomer 501 mixtures, which were left for 24 hours each. Then, the thermoplastic elastomer 411 mixture and the thermoplastic elastomer 501 mixture were poured into a twin-screw injection molding machine with 5 parts by weight of the thermoplastic elastomer 4601 and 4 parts by weight of the thermoplastic elastomer 1401 and stirred. Then, 30 parts by weight of polybutadiene RB-840, 2 parts by weight of an antiwear agent FZ-600, 1 part by weight of resin powder AMS-100, 12.5 parts by weight of naphthenic oil 60N were added, and all the mixtures were stirred for 5min and left standing for 10min to obtain a thermoplastic elastomer premix.
In a second step, the thermoplastic elastomer composition is prepared: 3 parts by weight of an expanding agent F-105D was added to a side feeding device of a twin-screw extruder, and the side feeding speed was set to 2%, so that the expanding agent and the thermoplastic elastomer premix were uniformly mixed, the uniformly mixed expanding agent and thermoplastic elastomer premix were extruded by a screw into a material pellet storage device, cooled to 50 ℃, and 0.08 parts by weight of an antioxidant 1076 and 0.18 parts by weight of an ultraviolet resistance agent 1010 were added to the cooled expanding agent and thermoplastic elastomer premix, to prepare a thermoplastic elastomer composition. The temperature of the twin-screw extrusion device is: the temperature of the first section is not debugged, so that the temperature is normal temperature, the temperature of the second section is 60 ℃, the temperature of the third section is 100 ℃, the temperature of the fourth section is 160 ℃, the temperature of the fifth section is 170 ℃, the temperature of the sixth section is 175 ℃, the temperature of the seventh section is 180 ℃, the temperature of the ninth section is 175, the temperature of the tenth section is 170 ℃, the temperature of the eleventh section is 165 ℃, and the temperature of the twelfth section is 165 ℃; the rotating speed of a main machine of the double-screw extruder is adjusted to 150r/min, the cutting speed of materials is adjusted to 2400r/min, and the feeding speed is 150kg/h.
Thirdly, preparing a thermoplastic foaming material: the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
Comparative example one
The thermoplastic foam of the comparative example of the present application does not contain the polybutadiene of the present application and an expanding agent.
The preparation method of the thermoplastic foaming material provided by the comparative example comprises the following steps:
preparation of raw materials: weighing, by weight, 411:12 parts of a thermoplastic elastomer, 188:3 parts of a thermoplastic elastomer, 475:4 parts of a thermoplastic elastomer, 4601:81 parts of a polystyrene PG-22:18 parts of impact-resistant polystyrene HIPS:26 parts of wear-resistant agent FZ-600:2 parts of ethylene-vinyl acetate copolymer EVA:0.7 parts of calcium carbonate 1003C:3 parts of an antioxidant 1076:0.2, ultraviolet resistance agent 1010:0.2, anti-ultraviolet agent 201:0.2, naphthenic oil: 15 parts.
The preparation method of the high wear-resistant thermoplastic elastomer comprises the following steps:
step one, stirring the thermoplastic elastomer 411 and naphthenic oil at normal temperature according to the mass ratio of 1:1, fully mixing the materials, and standing for more than one day to obtain a first mixture;
step two, after the first mixture is placed for more than one day, adding the first mixture, the thermoplastic elastomer 188, the thermoplastic elastomer 475 and the thermoplastic elastomer 4601 into a mixing and stirring tank, and stirring to fully mix the first mixture to obtain a second mixture;
step three, adding polystyrene PG-22, an antiwear agent FZ-600, ethylene-vinyl acetate copolymer EVA, calcium carbonate and the rest naphthenic oil into the second mixture, stirring for more than 5 minutes, and standing for more than 10 minutes after full mixing to obtain a third mixture;
step four: the temperature of the twin-screw extruder is adjusted, the temperature of the twin-screw extruder is adjusted and divided into twelve sections, wherein the temperature of the first section is not adjusted to be normal temperature, the temperature of the second section is 60 ℃, the temperature of the third section is 100 ℃, the temperature of the fourth section is 160 ℃, the temperature of the fifth section is 170 ℃, the temperature of the sixth section is 175 ℃, the temperature of the seventh section is 180 ℃, the temperature of the ninth section is 175, the temperature of the tenth section is 170 ℃, the temperature of the eleventh section is 165 ℃, and the temperature of the twelfth section is 165 ℃; the main machine rotating speed of the double-screw extruder is adjusted to 150r/min, the cutting speed of the material is adjusted to 2400r/min, and the feeding speed is 150kg/h;
step five: adding the third mixture into a double-screw extruder, changing the third mixture into a molten state in the extruder, extruding the third mixture in a strip shape from the double-screw extruder, cutting the third mixture into materials with regular sizes through the double-screw extruder, placing the materials into a storage tank, and cooling the materials to 50 ℃ in the storage tank; and step six, adding the antioxidant 1076, the ultraviolet resistance agent 1010 and the ultraviolet resistance agent 201 into a storage tank, and stirring for 15min to obtain the high wear-resistant thermoplastic elastomer product.
The foaming materials prepared in examples one to five and comparative example one were subjected to density and abrasion resistance tests, and the results are shown in the following table:
| density (g/cm) 3 ) | Wear index | |
| Example 1 | 0.62 | 150 |
| Example 2 | 0.55 | 200 |
| Example 3 | 0.58 | 190 |
| Example 4 | 0.61 | 175 |
| Example 5 | 0.62 | 170 |
| Comparative example 1 | 0.99 | 110 |
As can be seen from the above table, the density of the foamed materials in examples one to five is much less than that of comparative example one, and the extruder temperature of comparative example one was used in example five to produce foamed materials having a relatively lower density than that of examples one to four, but still greater than the abrasion resistance index and density of comparative example one. That is, the foaming material of the embodiment of the application has very low density, very light weight and very good wear resistance.
The foregoing is merely a specific embodiment of the application, and it will be apparent that various modifications and combinations thereof can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the application. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents. Any person skilled in the art can easily think of changes or substitutions within the technical scope of the present disclosure, and the present disclosure is intended to be covered by the present disclosure. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. A thermoplastic foam comprising a thermoplastic elastomer composition comprising a thermoplastic elastomer premix comprising a thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin, and an antiwear agent, and an expanding agent homogeneously filled within the thermoplastic elastomer premix.
2. The thermoplastic foam of claim 1, further comprising an antioxidant and an anti-uv agent.
3. The thermoplastic foam material according to claim 2, characterized in that it comprises, in parts by weight: 30 to 35 parts of thermoplastic elastomer, 1 to 2 parts of tackifying resin, 2 to 4 parts of wear-resistant agent, 3 to 5 parts of expanding agent, 30 to 35 parts of polybutadiene, 0.08 to 0.1 part of antioxidant, 0.18 to 0.2 part of ultraviolet resistant agent and 30 to 35 parts of naphthenic oil.
4. The thermoplastic foam according to claim 3, wherein the thermoplastic elastomer comprises 15 to 20 parts by weight of the first thermoplastic elastomer, 2.5 to 5 parts by weight of the second thermoplastic elastomer, 5 to 7 parts by weight of the third thermoplastic elastomer, and 4 to 6 parts by weight of the fourth thermoplastic elastomer.
5. A method for producing the thermoplastic foam according to any one of claims 1 to 4, comprising:
pouring the thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin and wear-resistant agent into a double-screw injection molding device for mixing and stirring to obtain a thermoplastic elastomer premix;
adding an expanding agent into a side feeding device of the double-screw extruder for feeding, so that the expanding agent and the thermoplastic elastomer premix are uniformly mixed to obtain a thermoplastic elastomer composition;
the thermoplastic elastomer composition is made into a thermoplastic foam using a twin screw extrusion device.
6. The method of producing a thermoplastic foam according to claim 5, wherein after adding the expanding agent to the side feeding device of the twin-screw extruder for feeding so that the expanding agent is uniformly mixed with the thermoplastic elastomer premix, the method further comprises:
extruding the uniformly mixed expanding agent and thermoplastic elastomer premix into a material granule storage device through a screw rod, and cooling to 50 ℃;
and adding an antioxidant and an ultraviolet resistant agent into the cooled expansion agent and thermoplastic elastomer premix to prepare the thermoplastic elastomer composition.
7. The method for preparing a thermoplastic foam according to claim 5, wherein the pouring the thermoplastic elastomer, polybutadiene, naphthenic oil, tackifying resin and wear-resistant agent into a double screw injection molding machine for mixing and stirring to obtain a thermoplastic elastomer premix comprises:
mixing and stirring the first thermoplastic elastomer and the second thermoplastic elastomer with naphthenic oil at normal temperature to obtain a first thermoplastic elastomer mixture and a second thermoplastic elastomer mixture;
adding the first thermoplastic elastomer mixture, the second thermoplastic elastomer mixture, the third thermoplastic elastomer and the fourth thermoplastic elastomer into a double-screw injection molding machine for stirring to obtain a third thermoplastic elastomer mixture;
polybutadiene, tackifying resin, antiwear agent and naphthenic oil are added to the third thermoplastic elastomer mixture to obtain a thermoplastic elastomer premix.
8. The method for producing a thermoplastic foam according to claim 5, wherein the feeding speed of the feeding device is 2% to 2.5%.
9. The method for producing a thermoplastic foam according to any one of claims 5 to 8, wherein the twin-screw extruder is a segmented extruder, and the working conditions of the twin-screw extruder include: the temperature of the twin-screw extrusion device is: the first section is at room temperature, the second section is 60-65 ℃, the third section is 100-105 ℃, the fourth section is 120-125 ℃, the fifth section is 140-141 ℃, the sixth section is 145-146 ℃, the seventh section is 150-151 ℃, the eighth section is 150-151 ℃, the ninth section is 145-146 ℃, the tenth section is 140-141 ℃, the eleventh section is 125-126 ℃, and the twelfth section is 125-126 ℃.
10. The method for producing a thermoplastic foam according to any one of claims 5 to 8, wherein the twin-screw extruder has a rotational speed of 150r/min to 180r/min, a feeding speed of 150kg/h to 180kg/h, and a material cutting speed of 2400r/min to 2600r/min.
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