CN112391024A - Anti-cracking TPE sheath material for charging cable and preparation and application thereof - Google Patents
Anti-cracking TPE sheath material for charging cable and preparation and application thereof Download PDFInfo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
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- H—ELECTRICITY
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- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
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Abstract
The invention discloses an anti-cracking TPE sheath material for a charging cable, and a preparation method and an application thereof, wherein the anti-cracking TPE sheath material comprises the following raw materials in parts by weight: 5-20 parts of thermoplastic elastomer, 5-20 parts of polypropylene, 2-15 parts of polyolefin block copolymer, 2-15 parts of polybutylene, 0.5-3 parts of antioxidant, 2-10 parts of compatilizer, 0.5-2 parts of dispersant and 10-25 parts of plasticizer. According to the technical scheme, the thermoplastic elastomer and the polypropylene are used as the base bodies, the polyolefin block copolymer, the polybutene, the antioxidant, the compatilizer, the dispersant and the plasticizer are added, and the components are matched with each other and have a synergistic effect, so that the cable sheath material can ensure the original good processability and elasticity of the thermoplastic elastomer, the cracking resistance of the cable sheath material is also obviously improved, and the technical problem that the existing TPE sheath material for the charging cable is easy to crack can be solved.
Description
Technical Field
The invention relates to the field of cables, in particular to an anti-cracking TPE sheath material for a charging cable, and preparation and application thereof.
Background
The electric automobile develops rapidly in recent years, and in 2020, the electric automobile breaks through 500 thousands of vehicles in China. The rapid growth in the electric vehicle market has also led to a rapid growth in charging facilities. The number of charging stations in China reaches 1.2 ten thousand by 2020, and the number of charging piles reaches 450 ten thousand; and each charging pile is matched with one to two charging cables for charging, so that the using amount of the charging cables is huge.
With the continuous maturity of new energy automobile technology, various automobile manufacturers at home and abroad invest in development and popularization of new energy charging automobiles, and under the support of government policies in China, new energy automobiles enter a rapid development stage, and the construction of corresponding new energy automobile matching charging facilities is also the key point of national development.
The outer layer of the charging cable comprises a sheath material, the sheath material can protect the cable conductor on the innermost layer from being influenced by external factors, and the charging cable has various protective performances such as flame retardance, corrosion resistance, oxidation resistance, buffering and shock absorption, sealing and water resistance and the like. The performance of the cable sheath material determines the service life of the charging cable to a certain extent.
Currently, the most common material for the sheath material of the charging cable is TPE. TPE (thermoplastic elastomer) is a thermoplastic elastomer for short, and is a material with the characteristics of high elasticity, high strength, high rebound resilience and injection molding processing of rubber; the rubber has the processing performance of thermoplastic plastics and the physical performance of vulcanized rubber, and can be called as the advantageous combination of the advantages of the plastics and the rubber. The TPE is environment-friendly, nontoxic, safe, wide in hardness range, excellent in colorability, soft in touch, weather-resistant, fatigue-resistant and temperature-resistant, excellent in processability, free of vulcanization, and capable of being recycled to reduce cost.
However, in the process of implementing the embodiments of the present application, the inventors of the present application found that the above-mentioned technology has at least the following technical problems: the sheath material of present TPE sheath material at charging pile junction port is because the bending radius is smaller, and the bending stress of receiving is bigger, and often use is bent repeatedly and can lead to sheath material and charging pile kneck stress cracking for the barrier propterty greatly reduced of cable sheathing material.
Therefore, it has become an urgent technical problem in the art to provide a crack-resistant TPE sheathing material for charging cables.
Disclosure of Invention
The invention mainly aims to provide an anti-cracking TPE sheath material for a charging cable, and preparation and application thereof, and aims to solve the technical problem that the existing TPE sheath material for the charging cable is easy to crack.
The technical problem to be solved by the invention is realized by the following technical scheme:
the invention provides an anti-cracking TPE sheath material for a charging cable, which comprises the following raw materials in parts by weight: 5-20 parts of thermoplastic elastomer, 5-20 parts of polypropylene, 2-15 parts of polyolefin block copolymer, 2-15 parts of polybutylene, 0.5-3 parts of antioxidant, 2-10 parts of compatilizer, 0.5-2 parts of dispersant and 10-25 parts of plasticizer.
Further, the thermoplastic elastomer is one of SBS, SEPS and SEBS.
Further, the compatilizer is one or more of ethylene-octene copolymer grafted maleic anhydride copolymer, ethylene-propylene copolymer grafted maleic anhydride copolymer and SEBS grafted maleic anhydride copolymer; the plasticizer is one or more of white oil, naphthenic oil and paraffin oil.
Further, the feed also comprises the following raw materials in parts by weight: 3-5 parts of polyphenyl ether, 5-20 parts of aluminum diethylphosphinate, 10-40 parts of melamine urate, 10-30 parts of an inorganic flame retardant and 3-10 parts of a flame retardant synergist.
Further, the inorganic flame retardant is one or more of magnesium hydroxide, aluminum hydroxide, talcum powder and calcium carbonate; the flame-retardant synergist is one or more of organosilicate synergist, kaolin, nano montmorillonite, zinc borate and zinc sulfate.
Further, the feed also comprises the following raw materials in parts by weight: 0.5-5 parts of compound mildew preventive.
Further, the compound mildew preventive consists of tetramethylthiuram disulfide and inorganic aluminosilicate containing silver ions.
Further, the feed also comprises the following raw materials in parts by weight: 0.5-2 parts of a lubricant.
Further, the lubricant is one or more of stearic acid, calcium stearate, magnesium stearate, polyethylene wax, paraffin, silicone and silane coupling agent.
According to another aspect of the invention, a preparation method of the anti-cracking TPE sheathing compound for the charging cable is provided, which comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Further, in step S3, the granulation temperature is 160-190 ℃.
Further, in step S4, the extrusion temperature of the twin-screw extruder is 160-.
According to another aspect of the invention, the anti-cracking TPE sheathing compound for the charging cable is also provided for application to the charging cable of the electric automobile.
The invention has the following beneficial effects:
according to the technical scheme, the thermoplastic elastomer and the polypropylene are used as the base bodies, the polyolefin block copolymer, the polybutene, the antioxidant, the compatilizer, the dispersant and the plasticizer are added, and the components are matched with each other and have a synergistic effect, so that the cable sheath material can ensure the original good processability and elasticity of the thermoplastic elastomer, the cracking resistance of the cable sheath material is also obviously improved, and the technical problem that the existing TPE sheath material for the charging cable is easy to crack can be solved.
The compounding of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions is used as the composite mildew preventive, the composite mildew preventive has good compatibility with a matrix material, the physical properties of matrix resin are not influenced, and the inventor unexpectedly discovers that the compounding of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions generates a synergistic effect, the mildew resistance is obviously improved, bacteria and mildew can be effectively prevented from growing on the cable, the service life of the cable can be prolonged, and an unexpected technical effect is achieved.
The preparation method has the advantages of simple steps, convenient operation and control, stable quality, high production efficiency and low production cost, and can be used for large-scale industrial production.
Detailed Description
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
Unless otherwise defined, terms used in the present specification have the same meaning as those generally understood by those skilled in the art, but in case of conflict, the definitions in the present specification shall control.
The use of "including," "comprising," "containing," "having," or other variations thereof herein, is meant to encompass the non-exclusive inclusion, as such terms are not to be construed. The term "comprising" means that other steps and ingredients can be added that do not affect the end result. The term "comprising" also includes the terms "consisting of …" and "consisting essentially of …". The compositions and methods/processes of the present invention comprise, consist of, and consist essentially of the essential elements and limitations described herein, as well as any of the additional or optional ingredients, components, steps, or limitations described herein.
All numbers or expressions referring to quantities of ingredients, process conditions, etc. used in the specification and claims are to be understood as modified in all instances by the term "about". All ranges directed to the same component or property are inclusive of the endpoints, and independently combinable. Because these ranges are continuous, they include every value between the minimum and maximum values. It should also be understood that any numerical range recited herein is intended to include all sub-ranges within that range.
As used herein, "parts by weight" or "parts by weight" are used interchangeably and can be any fixed weight expressed in milligrams, grams, or kilograms (e.g., 1mg, 1g, 2g, 5g, or 1kg, etc.). For example, a composition consisting of 1 part by weight of component a and 9 parts by weight of component b may be a composition consisting of 1g of component a +9 g of component b, or 10 g of component a +90 g of component b.
Just as the background art describes, there is the current TPE sheath material among the prior art because the bending radius is less at the sheath material that fills the electric pile junction port, and the bending stress of receiving is bigger, and it can lead to sheath material and fill electric pile kneck stress cracking to often use bending repeatedly for the problem of cable sheath material's barrier propterty greatly reduced. In order to solve the technical problems, the invention provides an anti-cracking TPE sheath material for a charging cable and a preparation method thereof.
The first aspect is that an anti-cracking TPE sheath material for charging cables comprises the following raw materials in parts by weight: 5-20 parts of thermoplastic elastomer, 5-20 parts of polypropylene, 2-15 parts of polyolefin block copolymer, 2-15 parts of polybutylene, 0.5-3 parts of antioxidant, 2-10 parts of compatilizer, 0.5-2 parts of dispersant and 10-25 parts of plasticizer.
In the examples of the present invention, the thermoplastic elastomer is 5 to 20 parts by weight, for example, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, and any value therebetween.
In the embodiment of the present invention, the thermoplastic elastomer is preferably, but not limited to, one of SBS, SEPS, and SEBS; more preferably, the thermoplastic elastomer is SEBS (hydrogenated styrene-butadiene block copolymer).
In the examples of the present invention, the polypropylene is 5 to 20 parts by weight, for example, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts and any value therebetween.
The thermoplastic elastomer and the polypropylene are used as matrixes, the polypropylene can reduce the viscosity of the thermoplastic elastomer during melting and improve the fluidity of the thermoplastic elastomer, and meanwhile, the polypropylene is used as a crystalline polymer, so that the thermoplastic elastomer and the polypropylene can exist in a bicontinuous phase structure, and the mechanical property and the physical and mechanical properties of the thermoplastic elastomer are greatly improved.
In the examples of the present invention, the polyolefin block copolymer is used in an amount of 2 to 15 parts by weight, for example, 2 parts, 4 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts and any value therebetween.
The polyolefin block copolymer is added, is formed by regularly and alternately arranging hard chain segments and soft chain segments, has outstanding toughness, and has excellent low-temperature performance, heat resistance and wear resistance; the polyolefin block copolymer is added into a TPE system, so that the whole system has higher cracking resistance, the whole system still has good toughness at low temperature, and the cable can still bend and move without cracking when used at low temperature. The bending strength of polyolefin block copolymer itself is very low, adds into the TPE system, can reduce the bending strength of whole system, makes the material under the condition of equal hardness, and bending stress is littleer, after preparing into charging cable, makes to fill electric pile big cable softer, reduces its bending radius to reach when using, fill the requirement that electric pile port department cable does not split.
The polyolefin block copolymers of the present invention are not particularly limited, and may be those known to those skilled in the art, and may be prepared by a known method or commercially available.
In the examples of the present invention, the polybutene is present in an amount of 2 to 15 parts by weight, for example, 2 parts, 4 parts, 5 parts, 8 parts, 10 parts, 12 parts, 15 parts and any value therebetween.
The polybutylene is added in the invention, because the polybutylene has outstanding wear resistance, not only has the impact toughness of polyethylene, but also has the stress cracking resistance and excellent creep resistance which are higher than those of polypropylene, and has the characteristics of rubber, and the polybutylene can bear the stress with the yield strength of 90 percent for a long time. Meanwhile, the thermal deformation temperature is higher, the heat resistance is good, the embrittlement temperature is low (minus 30 ℃), the thermal deformation temperature can be used for a long time at minus 30-100 ℃, and the thermal deformation temperature has flexibility; polybutene is acid, alkali, solvent, various chemicals and the like resistant at normal temperature, and most inorganic chemical reagents resistant at a temperature lower than 93 ℃. In addition, polybutene has excellent moisture barrier properties and also has excellent electrical insulating properties. The wear-resistant, oil-resistant and cracking-resistant performances of the polybutene can be brought into the whole system by adding the polybutene, so that the TPE sheath material disclosed by the invention has good wear-resistant, oil-resistant and cracking-resistant performances.
In the examples of the present invention, the antioxidant is 0.5 to 3 parts by weight, for example, 0.5 part, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts and any value therebetween.
The antioxidant of the present invention is not particularly limited, and may be one known to those skilled in the art, prepared by a known method or commercially available. Preferably, the antioxidant is one or more of bis [3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] (antioxidant 1035), tris [2, 4-di-tert-butylphenyl ] phosphite (antioxidant 168), pentaerythritol tetrakis (3-laurylthiopropionate) (antioxidant TH-412S), N' -bis- (3- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl) hexamethylenediamine (antioxidant 1098). According to the invention, the antioxidant is added, so that the oxidation process of the raw materials can be delayed or inhibited, and the TPE sheath material is prevented from embrittlement and cracking due to external high-temperature and light aging.
In the examples of the present invention, the weight part of the compatibilizer is 2 to 10 parts, for example, 2 parts, 4 parts, 6 parts, 8 parts, 10 parts, and any value therebetween.
The compatibilizing agent of the present invention is not particularly limited, and may be one known to those skilled in the art, prepared by a known method or commercially available. Preferably, the compatilizer is one or more of ethylene-octene copolymer grafted maleic anhydride copolymer, ethylene-propylene copolymer grafted maleic anhydride copolymer and SEBS grafted maleic anhydride copolymer. According to the invention, by adding the compatilizer, raw materials can be better compatible, higher mechanical properties can be shown, and cracking caused by poor compatibility of the raw materials can be prevented.
In the examples of the present invention, the dispersant is present in an amount of 0.5 to 2 parts by weight, for example, 0.5 parts, 0.8 parts, 1 part, 1.5 parts, 2 parts, and any value therebetween.
According to the invention, the raw material can be better dispersed in the matrix material by adding the dispersing agent, and the raw material is not cracked due to the generation of a stress failure point. The dispersant of the present invention is not particularly limited, and may be one known to those skilled in the art, prepared by a known method or commercially available. By way of example, the dispersant is one or more of polyacrylamide, ethylene bis fatty acid amide, triethylhexyl phosphoric acid and sodium octyl sulfonate.
In the examples of the present invention, the amount of the plasticizer is 10 to 25 parts by weight, for example, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, 22 parts, 25 parts, and any value therebetween.
In the invention, the plasticizer is added, so that the fluidity of the thermoplastic elastomer can be improved, and the processability of the thermoplastic elastomer can be improved. The plasticizer in the present invention is not particularly limited, and may be one known to those skilled in the art, prepared by a known method or commercially available. Preferably, the plasticizer is one or more of white oil, naphthenic oil and paraffin oil.
According to the technical scheme, the thermoplastic elastomer and the polypropylene are used as the base bodies, the polyolefin block copolymer, the polybutene, the antioxidant, the compatilizer, the dispersant and the plasticizer are added, and the components are matched with each other and have a synergistic effect, so that the cable sheath material can ensure the original good processability and elasticity of the thermoplastic elastomer, the cracking resistance of the cable sheath material is also obviously improved, and the technical problem that the existing TPE sheath material for the charging cable is easy to crack can be solved.
The inventor of the invention tries and discovers in various researches that the polyolefin block copolymer and the polybutene are simultaneously added into the base materials of the thermoplastic elastomer and the polypropylene to generate good synergistic effect, the combination obtains unexpected technical effect, the anti-cracking performance of the TPE sheath material is remarkably improved, and the service life of the whole cable is prolonged.
As a further improvement, the feed also comprises the following raw materials in parts by weight: 3-5 parts of polyphenyl ether, 5-20 parts of aluminum diethylphosphinate, 10-40 parts of melamine urate, 10-30 parts of an inorganic flame retardant and 3-10 parts of a flame retardant synergist; more preferably, the feed also comprises the following raw materials in parts by weight: 4-5 parts of polyphenyl ether, 10-15 parts of aluminum diethylphosphinate, 20-30 parts of melamine urate, 15-25 parts of an inorganic flame retardant and 5-8 parts of a flame retardant synergist.
In the embodiment of the invention, the inorganic flame retardant is one or more of magnesium hydroxide, aluminum hydroxide, talcum powder and calcium carbonate; the flame-retardant synergist is one or more of organosilicate synergist, kaolin, nano montmorillonite, zinc borate and zinc sulfate.
Because the oxygen index of the thermoplastic elastomer is only 18 percent, the thermoplastic elastomer and the blend material thereof are easily decomposed by heating, the product is flammable, dense smoke and molten drops are generated during combustion, once the flame is ignited, serious fire accidents can be caused, and the serious threat to human lives and properties is formed. In order to improve the flame retardancy of the cable sheath material, a large amount of flame retardant is often added, but the mechanical properties of the cable sheath material, especially the cracking resistance, are easily reduced.
In consideration of comprehensive performance of the whole technical scheme, based on mutual influence and matching with other materials, the polyphenyl ether, the aluminum diethylphosphinate, the melamine urate, the inorganic flame retardant and the flame retardant synergist are selected to be compounded as the flame retardant, and the polyphenyl ether and the flame retardant synergist have strong char forming self-extinguishing effect; aluminum diethylphosphinate belongs to a phosphorus flame retardant and provides a phosphorus source; the melamine urate belongs to a nitrogen flame retardant and provides a nitrogen source; the inorganic flame retardant may provide water; the components are matched with each other and have a synergistic effect, so that the cable sheath material has a remarkable flame-retardant effect, and meanwhile, the flame retardant has good compatibility with a base material, the using amount of the inorganic flame retardant is greatly reduced, the mechanical property is slightly influenced, and the TPE sheath material has excellent performances such as cracking resistance. In addition, the flame retardant is free of halogen, so that the flame retardant has the characteristics of environmental protection and no toxicity.
As a further improvement, the feed also comprises the following raw materials in parts by weight: 0.5-5 parts of compound mildew preventive.
In the embodiment of the invention, the composite mildew preventive consists of tetramethylthiuram disulfide and inorganic aluminum silicate containing silver ions. More preferably, the mass ratio of the tetramethylthiuram disulfide to the inorganic silver-ion containing aluminosilicate is 1: 1.
At present, most outdoor charging cables do not have the mould-proof function or the mould-proof function is not obvious, so that the charging cables go mouldy for a period of time, and the service life of the cables is shortened. Furthermore, the inventors have found in practice that the resistance of the cable sheathing material to mold is low after the use of the above flame retardant, which is a technical problem that has never been recognized before by those skilled in the art.
The present inventors have made further studies to solve the technical problem, and as a result, found that: the compounding of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions is used as the composite mildew preventive, the composite mildew preventive has good compatibility with a matrix material, the physical properties of matrix resin are not influenced, and the inventor unexpectedly discovers that the compounding of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions generates a synergistic effect, the mildew resistance is obviously improved, bacteria and mildew can be effectively prevented from growing on a cable, the service life of the cable can be prolonged, an unexpected technical effect is obtained, and the problem that the charging cable is easy to mildew due to the addition of the specific flame retardant is effectively solved.
In the invention, the tetramethyl thiuram disulfide and the inorganic aluminum silicate containing silver ions are nontoxic, long-acting and tasteless mildewproof agents. The tetramethylthiuram disulfide can react with-NH 2 and-SH of the enzyme to inhibit the function of the enzyme, and can inhibit ribonucleic acid (RNA) synthesis during cell germination to prevent spore germination. The inorganic aluminosilicate containing silver ions is adopted, is a completely crosslinked and open network structure, can effectively control the release of antibacterial silver ions, has an interference effect on cell walls, mainly inhibits the connection of polysaccharide chains and tetrapeptide crosslinking, so that the integrity of the cell walls is lost, the protection effect on osmotic pressure is lost, thalli and mould are damaged, and the most preferable is IRGAGUARD B5000 produced by Ciba of Switzerland.
In the embodiment of the invention, the paint also comprises the following raw materials in parts by weight: 0.5-2 parts of a lubricant.
According to the invention, by adding the lubricant, the mixed feeding material in a plasticizing state in an internal mixing process has better compatibility and leveling property, and the uniform overall appearance and smooth surface of the sheath material are ensured. The lubricant is not particularly limited in the invention, and may be one known to those skilled in the art, prepared by a known method or commercially available. Preferably, the lubricant is one or more of stearic acid, calcium stearate, magnesium stearate, polyethylene wax, paraffin, silicone, and silane coupling agent.
In a second aspect, a preparation method of the anti-cracking TPE sheathing compound for charging cables in the first aspect is provided, which comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
In step S3, the granulation temperature is 190 ℃, such as 160 ℃, 165 ℃, 170 ℃, 175 ℃, 180 ℃, 185 ℃, 190 ℃ and any value therebetween.
In step S4, the extrusion temperature of the twin-screw extruder is 160-; the screw rotation speed is 100-500r/min, such as 100r/min, 200r/min, 300r/min, 400r/min, 500r/min and any value therebetween.
In the examples of the present invention, the specific processes and conditions for banburying are not particularly limited, and the conventional processes for banburying known to those skilled in the art may be used.
In a third aspect, the anti-cracking TPE sheathing compound for charging cables in the first aspect is also provided for use in charging cables for electric vehicles.
In order to better understand the technical solutions, the technical solutions will be described in detail with reference to specific examples, which are only preferred embodiments of the present invention and are not intended to limit the present invention.
Example 1
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 17 parts of thermoplastic elastomer, 12 parts of polypropylene, 8 parts of polyolefin block copolymer, 10 parts of polybutene, 1.5 parts of antioxidant, 4 parts of compatilizer, 1 part of dispersant and 18 parts of plasticizer.
Wherein the thermoplastic elastomer is hydrogenated styrene-butadiene block copolymer SEBS; the compatilizer is one or more of SEBS grafted maleic anhydride copolymer; the plasticizer is white oil; the antioxidant is an antioxidant 1035; the dispersant is polyacrylamide.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 175 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 185 ℃, and the screw rotating speed is 300 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Example 2
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 50 parts of thermoplastic elastomer, 20 parts of polypropylene, 8 parts of polyolefin block copolymer, 2 parts of polybutene, 3 parts of antioxidant, 6 parts of compatilizer, 0.5 part of dispersant and 25 parts of plasticizer.
Wherein the thermoplastic elastomer is SBS and SEBS; the compatilizer is an ethylene-octene copolymer grafted maleic anhydride copolymer and an ethylene-propylene copolymer grafted maleic anhydride copolymer; the plasticizer is naphthenic oil; the antioxidant is antioxidant 168 and antioxidant TH-412S; the dispersing agent is triethyl hexyl phosphoric acid and sodium octyl sulfonate.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 160 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 195 ℃, and the screw rotating speed is 500 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Example 3
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 10 parts of thermoplastic elastomer, 10 parts of polypropylene, 5 parts of polyolefin block copolymer, 5 parts of polybutene, 1 part of antioxidant, 5 parts of compatilizer, 1 part of dispersant, 10 parts of plasticizer, 3 parts of polyphenyl ether, 10 parts of aluminum diethylphosphinate, 15 parts of melamine urate, 17 parts of inorganic flame retardant, 3 parts of flame-retardant synergist and 3 parts of lubricant.
Wherein the thermoplastic elastomer is hydrogenated styrene-butadiene block copolymer SEBS; the compatilizer is an ethylene-octene copolymer grafted maleic anhydride copolymer; the plasticizer is white oil; the inorganic flame retardant is magnesium hydroxide; the flame retardant synergist is kaolin; the antioxidant is antioxidant 168; the dispersant is polyacrylamide; the lubricant is stearic acid.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 180 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 170 ℃, and the screw rotating speed is 200 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Example 4
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 20 parts of thermoplastic elastomer, 18 parts of polypropylene, 2 parts of polyolefin block copolymer, 12 parts of polybutene, 0.5 part of antioxidant, 10 parts of compatilizer, 1 part of dispersing agent, 15 parts of plasticizer, 3 parts of polyphenyl ether, 20 parts of aluminum diethylphosphinate, 10 parts of melamine urate, 30 parts of inorganic flame retardant and 6 parts of flame retardant synergist.
Wherein the thermoplastic elastomer is SEPS; the compatilizer is an ethylene-propylene copolymer grafted maleic anhydride copolymer and an SEBS grafted maleic anhydride copolymer; the plasticizer is white oil and paraffin oil; the inorganic flame retardant is aluminum hydroxide and talcum powder; the flame-retardant synergist is nano montmorillonite and zinc borate; the antioxidant is an antioxidant TH-412S and an antioxidant 1098; the dispersing agent is triethyl hexyl phosphoric acid and sodium octyl sulfonate.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 160 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 160 ℃, and the screw rotating speed is 100 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Example 5
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 10 parts of thermoplastic elastomer, 10 parts of polypropylene, 5 parts of polyolefin block copolymer, 10 parts of polybutene, 1 part of antioxidant, 5 parts of compatilizer, 1 part of dispersant, 10 parts of plasticizer, 3 parts of polyphenyl ether, 10 parts of aluminum diethylphosphinate, 15 parts of melamine urate, 15 parts of inorganic flame retardant, 3 parts of flame-retardant synergist, 0.5 part of composite mildew preventive and 3 parts of lubricant.
Wherein the thermoplastic elastomer is hydrogenated styrene-butadiene block copolymer SEBS; the compatilizer is an ethylene-octene copolymer grafted maleic anhydride copolymer; the plasticizer is white oil; the inorganic flame retardant is calcium carbonate; the flame retardant synergist is zinc sulfate; the composite mildew inhibitor consists of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions in a mass ratio of 1: 1; the lubricant is calcium stearate; the antioxidant is an antioxidant TH-412S; the dispersant is polyacrylamide.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 180 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 175 ℃, and the screw rotating speed is 200 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Example 6
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 20 parts of thermoplastic elastomer, 10 parts of polypropylene, 7 parts of polyolefin block copolymer, 6 parts of polybutene, 3 parts of antioxidant, 10 parts of compatilizer, 0.5 part of dispersant, 10 parts of plasticizer, 3 parts of polyphenyl ether, 5 parts of aluminum diethylphosphinate, 10 parts of melamine urate, 30 parts of inorganic flame retardant, 10 parts of flame-retardant synergist, 0.7 part of composite mildew inhibitor and 2 parts of lubricant.
Wherein the thermoplastic elastomer is SBS; the compatilizer is one or more of SEBS grafted maleic anhydride copolymer; the plasticizer is paraffin oil; the inorganic flame retardant is talcum powder; the flame retardant synergist is kaolin; the composite mildew inhibitor consists of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions in a mass ratio of 1: 1; the lubricant is silicone; the antioxidant is an antioxidant 1035 and an antioxidant 1098; the dispersant is ethylene bis fatty acid amide.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 190 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 190 ℃, and the screw rotating speed is 250 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Example 7
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 12 parts of thermoplastic elastomer, 5 parts of polypropylene, 15 parts of polyolefin block copolymer, 9 parts of polybutene, 3 parts of antioxidant, 8 parts of compatilizer, 1 part of dispersing agent, 15 parts of plasticizer, 4 parts of polyphenyl ether, 20 parts of aluminium diethylphosphinate, 40 parts of melamine urate, 10 parts of inorganic flame retardant, 3 parts of flame-retardant synergist, 5 parts of composite mildew preventive and 0.5 part of lubricating agent.
Wherein the thermoplastic elastomer is SEBS; the compatilizer is SEBS grafted maleic anhydride copolymer; the plasticizer is white oil and naphthenic oil; the inorganic flame retardant is magnesium hydroxide and aluminum hydroxide; the flame-retardant synergist is kaolin and nano montmorillonite; the composite mildew inhibitor consists of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions in a mass ratio of 1: 1; the lubricant is calcium stearate and magnesium stearate; the antioxidant is antioxidant 168; the dispersant is polyacrylamide.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 165 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 165 ℃, and the screw rotating speed is 150 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Example 8
The anti-cracking TPE sheath material for the charging cable comprises the following raw materials in parts by weight: 13 parts of thermoplastic elastomer, 20 parts of polypropylene, 8 parts of polyolefin block copolymer, 2 parts of polybutene, 3 parts of antioxidant, 4 parts of compatilizer, 1 part of dispersant, 15 parts of plasticizer, 3 parts of polyphenyl ether, 14 parts of aluminum diethylphosphinate, 20 parts of melamine urate, 10 parts of inorganic flame retardant, 5 parts of flame-retardant synergist, 2 parts of composite mildew inhibitor and 1 part of lubricant.
Wherein the thermoplastic elastomer is SBS; the compatilizer is SEBS grafted maleic anhydride copolymer; the plasticizer is paraffin oil; the inorganic flame retardant is talcum powder; the flame retardant synergist is an organosilicate synergist; the composite mildew inhibitor consists of tetramethyl thiuram disulfide and inorganic aluminum silicate containing silver ions in a mass ratio of 1: 1; the lubricant is polyethylene wax; the antioxidant is an antioxidant 1098; the dispersant is triethyl hexyl phosphoric acid.
The preparation method comprises the following steps:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles; wherein the granulation temperature is 180 ℃;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material; the extrusion temperature of the double-screw extruder is 185 ℃, and the screw rotating speed is 400 r/min;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
Comparative example 1
Based on example 1, the difference is only that: the comparative example 1 comprises the following raw materials in parts by weight: 17 parts of thermoplastic elastomer, 12 parts of polypropylene, 18 parts of polyolefin block copolymer, 1.5 parts of antioxidant, 4 parts of compatilizer, 1 part of dispersant and 18 parts of plasticizer.
Comparative example 2
Based on example 1, the difference is only that: the comparative example 2 comprises the following raw materials in parts by weight: 17 parts of thermoplastic elastomer, 12 parts of polypropylene, 18 parts of polybutylene, 1.5 parts of antioxidant, 4 parts of compatilizer, 1 part of dispersant and 18 parts of plasticizer.
Comparative example 3
Based on example 3, the difference is only that: the comparative example 3 comprises the following raw materials in parts by weight: 10 parts of thermoplastic elastomer, 10 parts of polypropylene, 5 parts of polyolefin block copolymer, 5 parts of polybutene, 1 part of antioxidant, 5 parts of compatilizer, 1 part of dispersant, 10 parts of plasticizer, 13 parts of diethyl aluminum phosphinate, 15 parts of melamine urate, 17 parts of inorganic flame retardant, 3 parts of flame retardant synergist and 3 parts of lubricant.
Comparative example 4
Based on example 3, the difference is only that: the comparative example 4 comprises the following raw materials in parts by weight: 10 parts of thermoplastic elastomer, 10 parts of polypropylene, 5 parts of polyolefin block copolymer, 5 parts of polybutene, 1 part of antioxidant, 5 parts of compatilizer, 1 part of dispersant, 10 parts of plasticizer, 3 parts of polyphenyl ether, 25 parts of melamine urate, 17 parts of inorganic flame retardant, 3 parts of flame retardant synergist and 3 parts of lubricant.
Comparative example 5
Based on example 3, the difference is only that: the comparative example 5 comprises the following raw materials in parts by weight: 10 parts of thermoplastic elastomer, 10 parts of polypropylene, 5 parts of polyolefin block copolymer, 5 parts of polybutene, 1 part of antioxidant, 5 parts of compatilizer, 1 part of dispersant, 10 parts of plasticizer, 3 parts of polyphenyl ether, 10 parts of aluminum diethylphosphinate, 32 parts of inorganic flame retardant, 3 parts of flame retardant synergist and 3 parts of lubricant.
Comparative example 6
Based on example 3, the difference is only that: the comparative example 6 comprises the following raw materials in parts by weight: 10 parts of thermoplastic elastomer, 10 parts of polypropylene, 5 parts of polyolefin block copolymer, 5 parts of polybutene, 1 part of antioxidant, 5 parts of compatilizer, 1 part of dispersant, 10 parts of plasticizer, 20 parts of polyphenyl ether, 10 parts of aluminum diethylphosphinate, 15 parts of melamine urate, 3 parts of flame retardant synergist and 3 parts of lubricant.
Comparative example 7
Based on example 3, the difference is only that: the comparative example 7 comprises the following raw materials in parts by weight: 10 parts of thermoplastic elastomer, 10 parts of polypropylene, 5 parts of polyolefin block copolymer, 5 parts of polybutene, 1 part of antioxidant, 5 parts of compatilizer, 1 part of dispersant, 10 parts of plasticizer, 3 parts of polyphenyl ether, 10 parts of aluminum diethylphosphinate, 15 parts of melamine urate, 20 parts of inorganic flame retardant and 3 parts of lubricant.
Comparative example 8
Based on example 5, the difference is only that: the compound mildew inhibitor in the comparative example 8 is tetramethylthiuram disulfide.
Comparative example 9
Based on example 5, the difference is only that: the composite mildewcide in comparative example 9 is inorganic aluminosilicate containing silver ions.
Test example
In order to verify the performance of the product of the invention, the TPE sheath materials prepared in examples 1-8 and comparative examples 1-9 were respectively subjected to relevant performance tests, and the specific method was as follows:
testing the physical and mechanical properties according to the standard of GB/T33594-2017;
the vertical combustion performance of the test sample is tested according to GB/T2408-2008 'determination of plastic combustion performance horizontal method and vertical method', and the test sample size is as follows: the length is 125mm, the width is 13mm, and the thickness is 3 mm;
the mildew resistance test was performed according to GJB 150.10A-2009.
The results of the tests of the TPE sheathing compounds of examples 1-8 are shown in Table 1.
Table 1 test results of properties of sheath materials prepared in examples 1 to 8
The TPE sheathing materials in comparative examples 1-2 had tear strengths of 15N/mm and 14N/mm, respectively, and the number of swings was 7500 and 7300, respectively.
The TPE sheathing materials in comparative examples 3-7 achieved V-1, and V-1 ratings, respectively, in the vertical burning tests.
The mildew-proof grades in the mildew-proof test of the TPE sheathing materials in the comparative examples 8 to 9 are 2 grades and 2 grades respectively.
The above-mentioned embodiments only express the embodiments of the present invention, and the description is more specific and detailed, but not understood as the limitation of the patent scope of the present invention, but all the technical solutions obtained by using the equivalent substitution or the equivalent transformation should fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides a charging cable is with anti-cracking type TPE sheath material which characterized in that includes the raw materials of following parts by weight: 5-20 parts of thermoplastic elastomer, 5-20 parts of polypropylene, 2-15 parts of polyolefin block copolymer, 2-15 parts of polybutylene, 0.5-3 parts of antioxidant, 2-10 parts of compatilizer, 0.5-2 parts of dispersant and 10-25 parts of plasticizer.
2. The anti-cracking TPE sheathing compound for a charging cable according to claim 1, wherein the thermoplastic elastomer is one of SBS, SEPS and SEBS; the compatilizer is one or more of ethylene-octene copolymer grafted maleic anhydride copolymer, ethylene-propylene copolymer grafted maleic anhydride copolymer and SEBS grafted maleic anhydride copolymer; the plasticizer is one or more of white oil, naphthenic oil and paraffin oil.
3. The anti-cracking TPE sheath material for the charging cable as claimed in claim 1, further comprising the following raw materials in parts by weight: 3-5 parts of polyphenyl ether, 5-20 parts of aluminum diethylphosphinate, 10-40 parts of melamine urate, 10-30 parts of an inorganic flame retardant and 3-10 parts of a flame retardant synergist.
4. The anti-cracking TPE sheathing compound for the charging cable according to claim 3, wherein the inorganic flame retardant is one or more of magnesium hydroxide, aluminum hydroxide, talcum powder and calcium carbonate; the flame-retardant synergist is one or more of organosilicate synergist, kaolin, nano montmorillonite, zinc borate and zinc sulfate.
5. The anti-cracking TPE sheath material for the charging cable as claimed in claim 1, further comprising the following raw materials in parts by weight: 0.5-5 parts of compound mildew preventive.
6. The crack-resistant TPE sheathing compound for a charging cable according to claim 5, wherein the compound fungicide consists of tetramethylthiuram disulfide and an inorganic aluminosilicate containing silver ions.
7. The anti-cracking TPE sheath material for the charging cable as claimed in claim 1, further comprising the following raw materials in parts by weight: 0.5-2 parts of a lubricant; the lubricant is one or more of stearic acid, calcium stearate, magnesium stearate, polyethylene wax, paraffin, silicone and silane coupling agent.
8. The method for preparing the anti-cracking TPE sheathing compound for charging cables as claimed in any one of claims 1 to 7, comprising the steps of:
s1, stirring and mixing a plasticizer and a thermoplastic elastomer, and standing to obtain the thermoplastic elastomer filled with the plasticizer;
s2, adding the thermoplastic elastomer filled with the plasticizer and other raw materials into an internal mixer for banburying to obtain a molten blend;
s3, feeding the molten blend into a single-screw extruder for granulation to obtain particles;
s4, putting the particles into a double-screw extruder to perform melt kneading extrusion to obtain an extruded material;
and S5, cooling and pelletizing the extruded material to obtain the anti-cracking TPE sheath material for the charging cable.
9. The method for preparing the anti-cracking TPE sheathing compound for the charging cable as claimed in claim 8, wherein in step S3, the granulation temperature is 160-190 ℃; in step S4, the extrusion temperature of the twin-screw extruder is 160-195 ℃, and the screw rotation speed is 100-500 r/min.
10. Use of the anti-cracking TPE sheathing compound for charging cables according to any one of claims 1 to 7 in charging cables for electric vehicles.
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| CN116601234A (en) * | 2021-02-25 | 2023-08-15 | 住友电气工业株式会社 | Resin composition, power cable and method for producing power cable |
| CN114437494A (en) * | 2022-03-11 | 2022-05-06 | 深圳市沃尔核材股份有限公司 | TPE sheath material for charging cable and preparation method thereof |
| CN114591589A (en) * | 2022-03-22 | 2022-06-07 | 广东安拓普聚合物科技有限公司 | Styrene elastomer for new energy charging pile cable and preparation method thereof |
| CN114591589B (en) * | 2022-03-22 | 2022-10-21 | 广东安拓普聚合物科技有限公司 | Styrene elastomer for new energy charging pile cable and preparation method thereof |
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