CN111647264A - High-flame-retardant low-smoke halogen-free TPU cable material and preparation method thereof - Google Patents
High-flame-retardant low-smoke halogen-free TPU cable material and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea
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Abstract
The invention relates to a high-flame-retardant low-smoke halogen-free TPU cable material and a preparation method thereof, relating to the technical field of cable materials, wherein the high-flame-retardant low-smoke halogen-free TPU cable material comprises the following raw materials in parts by weight: 150 parts of thermoplastic polyurethane 140-one, 15-25 parts of magnesium hydroxide, 7-13 parts of silicon rubber, 7-13 parts of wollastonite, 20-30 parts of polycarbonate, 20-30 parts of methyl methacrylate, 10-20 parts of magnesium aluminum silicate, 15-25 parts of compatilizer, 3-5 parts of initiator, 1-4 parts of surfactant, 2-5 parts of dispersant and 1-5 parts of smoke suppressant. The high-flame-retardant low-smoke halogen-free TPU cable material prepared by the invention has good flame retardance and smoke suppression, and the inorganic flame retardant has good compatibility, dispersibility and inclusion in a system, so that the agglomeration phenomenon is reduced, and the production quality of the cable material is favorably improved.
Description
Technical Field
The invention relates to the technical field of cable materials, in particular to a high-flame-retardant low-smoke halogen-free TPU cable material and a preparation method thereof.
Background
In recent years, with the national emphasis on environmental protection and safety, not only low-smoke halogen-free cables are required in some large buildings or public places, but also electric wires and cables used in rolling stock are required to have higher requirements, and on one hand, excellent flame retardant performance is required, and the smoke generation amount and the emission of corrosive gas are required to be low during ignition and combustion so as to prevent secondary disasters caused by smoke. On the other hand, the material is required to have the characteristics of heat resistance, stress cracking resistance, long service life and the like. The thermoplastic polyurethane elastomer (TPU) has the characteristics of good elasticity, good physical properties, good mechanical strength and the like, and is widely applied to the plastic processing industry and the wire and cable industry.
Chinese patent with publication number CN1257513C discloses a low-smoke halogen-free flame-retardant polyolefin cable material and a preparation method thereof, wherein the cable material comprises the following components in parts by weight: 65-75 parts of ethylene-acetic acid copolymer, 25-35 parts of high-density polyethylene, 90-140 parts of flame retardant A, 7-10 parts of flame retardant B, 15-30 parts of compatilizer, 1-2.5 parts of antioxidant A, 1-2.5 parts of antioxidant B, 1-1.5 parts of lubricant and 4-5 parts of cross-linking agent; the preparation method of the cable material comprises the process steps of batching, mixing, granulating, drying and the like. The invention has the advantages of good mechanical and processing performance, high temperature resistance grade, difficult dripping during combustion and the like.
However, the above prior art solutions have the following drawbacks: the cable material is prepared by taking ethylene-vinyl acetate and high-density polyethylene as base materials and adding a large amount of inorganic powder and other auxiliary agents, and the high-density polyethylene and other high-crystalline plastics have poor inclusion and compatibility with the inorganic powder, are difficult to disperse uniformly in a common mixing machine, and even can agglomerate into small particles or powder packets to influence the mechanical property of the cable material.
Disclosure of Invention
Aiming at the defects in the prior art, one of the purposes of the invention is to provide a high-flame-retardant low-smoke zero-halogen TPU cable material, and the raw materials in the high-flame-retardant low-smoke zero-halogen TPU cable material are easy to disperse uniformly, so that the probability of particle agglomeration is reduced, and the mechanical property of the cable material is favorably improved.
The invention also aims to provide a preparation method of the high-flame-retardant low-smoke halogen-free TPU cable material, which can uniformly disperse the raw materials for forming the high-flame-retardant low-smoke halogen-free TPU cable material, so that the quality of the cable material is improved.
The above object of the present invention is achieved by the following technical solutions: the high-flame-retardant low-smoke halogen-free TPU cable material comprises the following raw materials in parts by weight: 150 parts of thermoplastic polyurethane 140-one, 15-25 parts of magnesium hydroxide, 7-13 parts of silicon rubber, 7-13 parts of wollastonite, 20-30 parts of polycarbonate, 20-30 parts of methyl methacrylate, 10-20 parts of magnesium aluminum silicate, 15-25 parts of compatilizer, 3-5 parts of initiator, 1-4 parts of surfactant, 2-5 parts of dispersant and 1-5 parts of smoke suppressant.
By adopting the technical scheme, the magnesium aluminum silicate has a unique three-dimensional chain structure and a special needle and bar-shaped crystal structure, and a large amount of cations such as calcium, magnesium, hydrogen and the like are adsorbed between crystal layers of the magnesium aluminum silicate, so that the magnesium aluminum silicate has a good barrier effect on combustion heat, heat conduction and heat convection, and further diffusion of combustion heat during combustion of cable materials is isolated, thereby improving the flame retardant property of the cable materials. Because a large amount of cations such as calcium, magnesium, hydrogen and the like are adsorbed among crystal layers of the magnesium aluminum silicate, so that the electrical balance of a crystal structure is kept, the magnesium aluminum silicate shows good cation exchangeability, and can generate an effect with a polar group of a compatilizer in a system, so that the hydrophilic-oleophobic property of the magnesium aluminum silicate is changed into the hydrophobic-oleophilic property, the compatibility, the dispersibility and the inclusion property of the magnesium aluminum silicate in the system are improved, the agglomeration phenomenon is reduced, and the production quality of a cable material is improved. The thermoplastic polyurethane has the advantages of wide hardness range, high mechanical strength, outstanding cold resistance, good processability, oil resistance, water resistance, mould resistance and the like, is used for preparing the cable material, is favorable for improving the mechanical property and the ageing resistance of the cable material, and prolongs the service life of the cable material. The polycarbonate can emit carbon dioxide after being burnt and is used for preparing the cable material, so that the cable material has good flame retardant property. During the combustion process of the silicone rubber, silicone rubber molecules gradually migrate to the surface of the polycarbonate, combustion products are gradually enriched and form a Si-C compound, the Si-C compound has a good heat insulation effect, other components of the cable material are prevented from being in contact with oxygen, further combustion of other components is inhibited, and the polycarbonate and the silicone rubber act in a matching manner and are used for preparing the cable material, so that the cable material has good flame retardant property. In addition, the silicon rubber is not easy to ignite, the heat release rate is low during combustion, the combustion speed is slow, the Si-O bond on the main chain is converted into a continuous network structure with good oxidation resistance, the addition of the wollastonite can effectively improve the heat stability of the silicon rubber, so that the heat decomposition temperature of the silicon rubber is increased, the decomposition rate is reduced, and the wollastonite and the silicon rubber are matched to act to prepare the cable material, so that the heat stability of the cable material is improved.
The present invention in a preferred example may be further configured to: the high-flame-retardance low-smoke halogen-free TPU cable material comprises the following raw materials in parts by weight: 145 parts of thermoplastic polyurethane, 20 parts of magnesium hydroxide, 10 parts of silicon rubber, 10 parts of wollastonite, 25 parts of polycarbonate, 25 parts of methyl methacrylate, 15 parts of magnesium aluminum silicate, 20 parts of compatilizer, 4 parts of initiator, 2.5 parts of surfactant, 3.5 parts of dispersant and 3.5 parts of smoke suppressant.
The present invention in a preferred example may be further configured to: the compatilizer is maleic anhydride grafted polyethylene.
By adopting the technical scheme, the magnesium aluminum silicate can react with the polar group on the maleic anhydride grafted polyethylene in the system, so that the hydrophilicity and lipophobicity of the magnesium aluminum silicate are changed into the hydrophobicity and lipophilicity, and the compatibility, the dispersibility and the inclusion of the magnesium aluminum silicate in the system are improved. Under the combined action of the magnesium aluminum silicate and the maleic anhydride grafted polyethylene, the thermoplastic polyurethane, the polycarbonate, the methyl methacrylate, the magnesium aluminum silicate and the magnesium hydroxide in the system are dispersed more uniformly in the banburying process, the agglomeration phenomenon of the inorganic flame retardant is reduced, and the production quality of the cable material is improved.
The present invention in a preferred example may be further configured to: the dispersant is phosphate.
By adopting the technical scheme, the phosphate is used as the dispersing agent, the phosphate has good compatibility with the thermoplastic polyurethane, the exudation is small, and the phosphate is used for preparing the cable material, so that the dispersion among the raw materials is more uniform, and the agglomeration phenomenon of the cable material is further reduced.
The second purpose of the invention is realized by the following technical scheme, and the preparation method of the high-flame-retardant low-smoke halogen-free TPU cable material comprises the following steps:
(1) weighing magnesium hydroxide according to a proportion, drying for 3-4h under the condition of 105 ℃ of 100-;
(2) weighing thermoplastic polyurethane and polycarbonate according to a proportion, uniformly mixing, and placing in a vacuum drying oven at 75-78 ℃ for drying for 2.5-3.5h for later use;
(3) weighing silicon rubber, wollastonite, magnesium aluminum silicate, a compatilizer, a dispersant and a smoke suppressant according to the proportion, adding the mixture, the modified magnesium hydroxide particles and the mixture obtained in the step (2) into an internal mixer, internally mixing for 15-20min at the temperature of 170-175 ℃, and then extruding and granulating in an extruder to obtain the high-flame-retardant low-smoke zero-halogen TPU cable material.
By adopting the technical scheme, under the action of the surfactant and the initiator, the monomer methyl methacrylate forms polymethyl methacrylate, the number of hydroxyl groups on the surface of magnesium hydroxide is reduced after the magnesium hydroxide is wrapped by the polymethyl methacrylate, the magnesium hydroxide is changed from hydrophilic and oleophobic to hydrophobic and oleophilic, and the compatibility between the magnesium hydroxide and other polymer molecules is improved according to a similar compatibility principle so as to ensure that the magnesium hydroxide is uniformly dispersed in a system.
The present invention in a preferred example may be further configured to: the frequency of the ultrasonic wave in the step (1) is 1500-.
By adopting the technical scheme, the methyl methacrylate, the surfactant, the initiator and the magnesium hydroxide are uniformly dispersed in the deionized water by adopting ultrasonic wave for treatment.
The present invention in a preferred example may be further configured to: the fineness of the modified magnesium hydroxide particles in the step (1) is 90-100 meshes.
The present invention in a preferred example may be further configured to: the initiator is one of ammonium persulfate, azobisisobutyronitrile or benzoyl peroxide.
By adopting the technical scheme, ammonium persulfate, azodiisobutyronitrile or benzoyl peroxide is selected as an initiator, so that the monomer methyl methacrylate is conveniently polymerized into the polymethyl methacrylate, and the surface modification of the magnesium hydroxide in the system is conveniently carried out.
The present invention in a preferred example may be further configured to: the smoke suppressant is one of molybdenum trioxide, ammonium octamolybdate or calcium phosphomolybdate.
By adopting the technical scheme, the molybdenum trioxide, molybdate smoke suppressant and the polycarbonate form carbon residue to cover the surface of the polycarbonate, so that good flame-retardant smoke suppression effect is achieved.
In summary, the invention includes at least one of the following beneficial technical effects:
1. in the invention, the magnesium aluminum silicate has a unique three-dimensional chain structure and a special needle and bar crystal structure, and a large amount of cations such as calcium, magnesium, hydrogen and the like are adsorbed among crystal layers of the magnesium aluminum silicate, so that the magnesium aluminum silicate has good barrier effect on combustion heat, heat conduction and heat convection, and further diffusion of the combustion heat during the combustion of the cable material is isolated, thereby improving the flame retardant property of the cable material. Because a large amount of cations such as calcium, magnesium, hydrogen and the like are adsorbed among crystal layers of the magnesium aluminum silicate, so that the electrical balance of a crystal structure is kept, the magnesium aluminum silicate shows good cation exchangeability, and can generate an effect with a polar group of a compatilizer in a system, so that the hydrophilic-oleophobic property of the magnesium aluminum silicate is changed into the hydrophobic-oleophilic property, the compatibility, the dispersibility and the inclusion property of the magnesium aluminum silicate in the system are improved, the agglomeration phenomenon is reduced, and the production quality of a cable material is improved;
2. according to the invention, phosphate is used as a dispersing agent, the phosphate has good compatibility with thermoplastic polyurethane and small exudation, and is used for preparing a cable material, so that the dispersion among raw materials is more uniform, and the agglomeration phenomenon of the cable material is further reduced;
3. according to the invention, under the action of a surfactant and an initiator, a monomer methyl methacrylate forms polymethyl methacrylate, after magnesium hydroxide is wrapped by the polymethyl methacrylate, the number of hydroxyl groups on the surface of the magnesium hydroxide is reduced, and the magnesium hydroxide is changed from hydrophilic-oleophobic property to hydrophobic-oleophilic property.
Detailed Description
The present invention will be described in further detail with reference to examples.
Table 1 each component content of the high flame retardant low smoke zero halogen TPU cable material in examples 1-3
Example 1
The raw material proportion of the high-flame-retardant low-smoke halogen-free TPU cable material is shown in Table 1, and the preparation method of the high-flame-retardant low-smoke halogen-free TPU cable material comprises the following steps:
(1) weighing magnesium hydroxide according to a proportion, drying for 3.5h at 102.5 ℃, adding the weighed methyl methacrylate, surfactant and 1900g of deionized water, performing ultrasonic dispersion for 17.5min under the ultrasonic condition of 1525Hz, then adding initiator, introducing nitrogen for reaction for 2.5h, cooling to room temperature, sequentially performing vacuum filtration, vacuum drying, grinding and sieving with a 95-mesh sieve to obtain modified magnesium hydroxide particles;
(2) weighing thermoplastic polyurethane and polycarbonate according to a proportion, uniformly mixing, and placing in a vacuum drying oven at 76.5 ℃ for drying for 3 hours for later use;
(3) weighing silicon rubber, wollastonite, magnesium aluminum silicate, a compatilizer, a dispersant and a smoke suppressant according to a proportion, adding the mixture, the modified magnesium hydroxide particles and the mixture obtained in the step (2) into an internal mixer, internally mixing for 17.5min at the temperature of 172.5 ℃, and then extruding and granulating in an extruder to obtain the high-flame-retardant low-smoke halogen-free TPU cable material.
Example 2
The raw material proportion of the high-flame-retardant low-smoke halogen-free TPU cable material is shown in Table 1, and the preparation method of the high-flame-retardant low-smoke halogen-free TPU cable material comprises the following steps:
(1) weighing magnesium hydroxide according to a proportion, drying for 3h at 100 ℃, adding the weighed methyl methacrylate, surfactant and 1800g of deionized water, performing ultrasonic dispersion for 15min under the ultrasonic condition with the frequency of 1500Hz, then adding initiator, introducing nitrogen for reaction for 2h, cooling to room temperature, sequentially performing vacuum filtration, vacuum drying, grinding and sieving with a 90-mesh sieve to obtain modified magnesium hydroxide particles;
(2) weighing thermoplastic polyurethane and polycarbonate according to a proportion, uniformly mixing, and placing in a vacuum drying oven at 75 ℃ for drying for 2.5 hours for later use;
(3) weighing silicon rubber, wollastonite, magnesium aluminum silicate, a compatilizer, a dispersant and a smoke suppressant according to a proportion, adding the mixture, the modified magnesium hydroxide particles and the mixture obtained in the step (2) into an internal mixer, internally mixing for 15min at the temperature of 170 ℃, and then extruding and granulating in an extruder to obtain the high-flame-retardant low-smoke halogen-free TPU cable material.
Example 3
The raw material proportion of the high-flame-retardant low-smoke halogen-free TPU cable material is shown in Table 1, and the preparation method of the high-flame-retardant low-smoke halogen-free TPU cable material comprises the following steps:
(1) weighing magnesium hydroxide according to a proportion, drying at 105 ℃ for 4h, adding the weighed methyl methacrylate, surfactant and 2000g of deionized water, performing ultrasonic dispersion for 20min under the ultrasonic condition with the frequency of 1550Hz, then adding an initiator, introducing nitrogen for reaction for 3h, cooling to room temperature, sequentially performing vacuum filtration, vacuum drying, grinding and sieving with a 100-mesh sieve to obtain modified magnesium hydroxide particles;
(2) weighing thermoplastic polyurethane and polycarbonate according to a proportion, uniformly mixing, and placing in a vacuum drying oven at 78 ℃ for drying for 3.5 hours for later use;
(3) weighing silicon rubber, wollastonite, magnesium aluminum silicate, a compatilizer, a dispersant and a smoke suppressant according to a proportion, adding the mixture, the modified magnesium hydroxide particles and the mixture obtained in the step (2) into an internal mixer, internally mixing for 20min at the temperature of 175 ℃, and then extruding and granulating in an extruder to obtain the high-flame-retardant low-smoke halogen-free TPU cable material.
Comparative example 1
This comparative example differs from example 1 only in that no magnesium aluminum silicate was added.
Comparative example 2
This comparative example differs from example 1 only in that no maleic anhydride grafted polyethylene was added.
Comparative example 3
This comparative example differs from example 1 only in that no methyl methacrylate was added.
Comparative example 4
This comparative example differs from example 1 only in that no phosphate was added.
Comparative example 5
This comparative example differs from example 1 only in that the phosphate ester is replaced by glycerol monostearate.
Comparative example 6
This comparative example is compared to example 1, differing only in that the phosphate ester is replaced by glyceryl tristearate.
Comparative example 7
This comparative example is compared to example 1, differing only in that the phosphoric acid ester is replaced by vinyl bis stearamide.
Comparative example 8
This comparative example differs from example 1 only in that no silicone rubber was added.
Comparative example 9
This comparative example differs from example 1 only in that wollastonite was not added.
Comparative example 10
This comparative example differs from example 1 only in that no polycarbonate is added.
Performance detection
The following performance tests were performed on the high flame retardant low smoke zero halogen TPU cable materials obtained in examples 1-3 and comparative examples 1-10, and the test results are shown in Table 2.
1. The melt mass flow rate of the cable material is detected by GB/T3682-2000 determination of melt mass flow rate and melt volume flow rate of thermoplastic plastics.
2. And (3) detecting the limiting oxygen index of the cable material by using GB/T2046.2-2009 'determination of combustion behavior by using an oxygen index method'.
3. The tensile strength of the cable material is detected by GB/T1040.3-2006 test for tensile property of plastics.
4. 1000g of cable material was taken from each of examples 1 to 3 and comparative examples 1 to 10, and placed in 13 different muffle furnaces, respectively, at a temperature of 850 ℃ for 1 hour, and then taken out and weighed, and the mass retention ratio (%) -mass after combustion/mass before combustion was calculated.
Table 2 Performance test results of the high flame retardant low smoke zero halogen TPU cable materials obtained in examples 1-3 and comparative examples 1-10
As can be seen from Table 2:
in examples 2-3, the melt mass flow rate, limiting oxygen index, tensile strength and mass retention of the cable material were not significantly changed compared to example 1. Therefore, the change of the component proportion of the cable material and the parameter change in the preparation method process of the cable material have no obvious influence on the particle agglomeration phenomenon, the flame retardance and the tensile strength of the cable material.
Compared with the example 1, the components of the cable material are not added with the magnesium aluminum silicate, the melt mass flow rate of the cable material is obviously reduced, and the flame retardant property and the tensile strength of the cable material are reduced.
Compared with the example 1, the composition of the cable material of the comparative example 2 has no maleic anhydride grafted polyethylene, the melt mass flow rate of the cable material is obviously reduced, and the flame retardant property and the tensile strength of the cable material are not obviously changed.
Compared with the example 1, the composition of the cable material of the comparative example 3 has no methyl methacrylate, the melt mass flow rate of the cable material is obviously reduced, and the flame retardant property and the tensile strength of the cable material are not obviously changed.
Compared with the example 1, the components of the cable material of the comparative examples 4 to 7 are not added with phosphate or other dispersants are adopted to replace the phosphate, the melt mass flow rate of the cable material is obviously reduced, the flame retardant property of the cable material is reduced, and the tensile strength of the cable material is not obviously changed.
Compared with the example 1, the components of the cable material of the comparative examples 8 to 10 are not added with the silicon rubber, the wollastonite or the polycarbonate, the melt mass flow rate of the cable material is not obviously changed, and the flame retardant property and the tensile strength of the cable material are obviously reduced.
In conclusion, the magnesium aluminum silicate has a unique three-dimensional chain structure and a special needle-rod-shaped crystal structure, a large amount of cations such as calcium, magnesium, hydrogen and the like are adsorbed among crystal layers of the magnesium aluminum silicate, so that the magnesium aluminum silicate has a good barrier effect on combustion heat, heat conduction and heat convection, and further diffusion of the combustion heat during the combustion of the cable material is isolated, so that the flame retardant property of the cable material is improved. Because a large amount of cations such as calcium, magnesium, hydrogen and the like are adsorbed among crystal layers of the magnesium aluminum silicate, so that the electrical balance of a crystal structure is kept, the magnesium aluminum silicate shows good cation exchangeability, and can generate an effect with a polar group of a compatilizer in a system, so that the hydrophilic-oleophobic property of the magnesium aluminum silicate is changed into the hydrophobic-oleophilic property, the compatibility, the dispersibility and the inclusion property of the magnesium aluminum silicate in the system are improved, the agglomeration phenomenon is reduced, and the production quality of a cable material is improved.
The present embodiment is only for explaining the present invention, and not for limiting the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as needed after reading the present specification, but all of which are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. The high-flame-retardance low-smoke halogen-free TPU cable material is characterized by comprising the following components in parts by weight: 150 parts of thermoplastic polyurethane 140-one, 15-25 parts of magnesium hydroxide, 7-13 parts of silicon rubber, 7-13 parts of wollastonite, 20-30 parts of polycarbonate, 20-30 parts of methyl methacrylate, 10-20 parts of magnesium aluminum silicate, 15-25 parts of compatilizer, 3-5 parts of initiator, 1-4 parts of surfactant, 2-5 parts of dispersant and 1-5 parts of smoke suppressant.
2. The high-flame-retardant low-smoke halogen-free TPU cable material according to claim 1, characterized in that the raw materials of the high-flame-retardant low-smoke halogen-free TPU cable material comprise the following components in parts by weight: 145 parts of thermoplastic polyurethane, 20 parts of magnesium hydroxide, 10 parts of silicon rubber, 10 parts of wollastonite, 25 parts of polycarbonate, 25 parts of methyl methacrylate, 15 parts of magnesium aluminum silicate, 20 parts of compatilizer, 4 parts of initiator, 2.5 parts of surfactant, 3.5 parts of dispersant and 3.5 parts of smoke suppressant.
3. The high flame retardant low smoke zero halogen TPU cable material according to claim 1, characterized in that: the compatilizer is maleic anhydride grafted polyethylene.
4. The high flame retardant low smoke zero halogen TPU cable material according to claim 1, characterized in that: the dispersant is phosphate.
5. The preparation method of the high flame retardant low smoke zero halogen TPU cable material according to any one of claims 1 to 4, characterized in that the preparation method comprises the following steps:
(1) weighing magnesium hydroxide according to a proportion, drying for 3-4h under the condition of 105 ℃ of 100-;
(2) weighing thermoplastic polyurethane and polycarbonate according to a proportion, uniformly mixing, and placing in a vacuum drying oven at 75-78 ℃ for drying for 2.5-3.5h for later use;
(3) weighing silicon rubber, wollastonite, magnesium aluminum silicate, a compatilizer, a dispersant and a smoke suppressant according to the proportion, adding the mixture, the modified magnesium hydroxide particles and the mixture obtained in the step (2) into an internal mixer, internally mixing for 15-20min at the temperature of 170-175 ℃, and then extruding and granulating in an extruder to obtain the high-flame-retardant low-smoke zero-halogen TPU cable material.
6. The preparation method of the high flame retardant low smoke zero halogen TPU cable material according to claim 5, is characterized in that: the frequency of the ultrasonic wave in the step (1) is 1500-.
7. The preparation method of the high flame retardant low smoke zero halogen TPU cable material according to claim 5, is characterized in that: the fineness of the modified magnesium hydroxide particles in the step (1) is 90-100 meshes.
8. The high flame retardant low smoke zero halogen TPU cable material according to claim 1, characterized in that: the initiator is one of ammonium persulfate, azobisisobutyronitrile or benzoyl peroxide.
9. The high flame retardant low smoke zero halogen TPU cable material according to claim 1, characterized in that: the smoke suppressant is one of molybdenum trioxide, ammonium octamolybdate or calcium phosphomolybdate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010635537.0A CN111647264A (en) | 2020-07-04 | 2020-07-04 | High-flame-retardant low-smoke halogen-free TPU cable material and preparation method thereof |
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| CN202010635537.0A CN111647264A (en) | 2020-07-04 | 2020-07-04 | High-flame-retardant low-smoke halogen-free TPU cable material and preparation method thereof |
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| CN111647264A true CN111647264A (en) | 2020-09-11 |
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| CN116769271A (en) * | 2023-08-25 | 2023-09-19 | 四川宏亿复合材料工程技术有限公司 | Process method for producing damping backing plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116769271A (en) * | 2023-08-25 | 2023-09-19 | 四川宏亿复合材料工程技术有限公司 | Process method for producing damping backing plate |
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Application publication date: 20200911 |