Summary of the invention
The first object of the present invention is to obtain a kind of low smoke and zero halogen power cable sheath material of potter's clay modification, this material has higher flame retardant effect, mechanical property and good electric property, especially its cost is lower, and green, environmental protection, and processing characteristics is good.
The second object of the present invention is to obtain a kind of manufacture method of low smoke and zero halogen power cable sheath material of potter's clay modification, this material has higher flame retardant effect, mechanical property and good electric property, especially its cost is lower, and green, environmental protection, and processing characteristics is good.
A first aspect of the present invention provides a kind of low smoke and zero halogen power cable sheath material of potter's clay modification, it comprises following component: ethylene-vinyl acetate copolymer, linear low density polyethylene, high molecular weight compatibilizer, fire retardant, synergistic flame retardant, surface treatment agent, oxidation inhibitor, black masterbatch and processing aid, and the massfraction of each component is:
Wherein, in described fire retardant, contain barium sulfate;
Described synergistic flame retardant contains potter's clay.
In a specific embodiment of the present invention, it is comprised of following component: ethylene-vinyl acetate copolymer, linear low density polyethylene, high molecular weight compatibilizer, fire retardant, synergistic flame retardant, surface treatment agent, oxidation inhibitor, black masterbatch and processing aid, and the massfraction of each component is:
Wherein, in described fire retardant, contain barium sulfate;
Described synergistic flame retardant contains potter's clay.
In a specific embodiment of the present invention, wherein, in described ethylene-vinyl acetate copolymer, the mass percentage content of its vinyl acetate is 20~40%, and melting index is 3~7g/min.
In a specific embodiment of the present invention, wherein, described high molecular weight compatibilizer is one or both in maleic anhydride graft terpolymer EP rubber, maleic anhydride grafted polyethylene or maleated ethylene vinyl acetate copolyme; Preferably, described high molecular weight compatibilizer is maleated ethylene vinyl acetate copolyme.
In a specific embodiment of the present invention, wherein, described surface treatment agent is one or both in stearic acid, Zinic stearas or silane coupling agent;
Preferably, the surface treatment agent of employing is silane coupling agent.
In a specific embodiment of the present invention, wherein, described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, 4, one or more in 4 '-thiobis (6-tertiary butyl meta-cresol), β-(4-hydroxyl-3,5-di-tert-butyl-phenyl) positive octadecyl ester of propionic acid, Tyox B or thio-2 acid two (18) ester;
Preferably, the oxidation inhibitor of employing is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and Tyox Bs (proportioning is 5: 7).
In a specific embodiment of the present invention, wherein, described processing aid is a kind of in paraffin, polyethylene wax or ethylene bis stearic acid amide;
Preferably, the processing aid of employing is polyethylene wax.
In a specific embodiment of the present invention, wherein, described fire retardant is barium sulfate and the coordinating of other flame retardant compositions, and wherein said other fire retardants are selected from one or more in aluminium hydroxide, magnesium hydroxide.
In a specific embodiment of the present invention, wherein, described synergistic flame retardant is potter's clay, or the coordinating of potter's clay and other synergistic flame retardants, and described synergistic flame retardant is selected from one or more in zinc oxide, polynite.
In a specific embodiment of the present invention, the CABLE MATERIALS of preparation is by JB/T10707 standard.
In a specific embodiment of the present invention, the cable that the CABLE MATERIALS of preparation obtains is fire-retardant by the bunchy C class in IEC60332-3-24.
A second aspect of the present invention provides the preparation method of the low smoke and zero halogen power cable sheath material of a kind of potter's clay modification of the present invention, and described method comprises the steps:
Supply raw materials; Comprise:
Ethylene-vinyl acetate copolymer, linear low density polyethylene, high molecular weight compatibilizer, fire retardant, synergistic flame retardant, surface treatment agent, oxidation inhibitor, black masterbatch and processing aid, the massfraction of each component is:
Wherein, in described fire retardant, contain barium sulfate;
Described synergistic flame retardant contains potter's clay;
Raw material is prepared burden by the proportioning of each component, together put into the abundant mixing that high-speed mixer carries out 5 ± 1min, then add successively twin screw and single screw extrusion machine to carry out extruding pelletization; The temperature of screw rod is: 110~130 ℃ of feeding sections, 125~145 ℃ of transportation sections, 135~160 ℃ of fluxing zones, 130~150 ℃ of heads.
Embodiment
The inventor is through extensive and deep research, has higher flame retardant effect, mechanical property and the cable sheath material formula of electric property preferably by improving preparation technology, having obtained, and is surprised to find that processing characteristics is excellent especially.Completed on this basis the present invention.
Technical conceive of the present invention is as follows:
The invention discloses a kind of low smoke and zero halogen power cable sheath material and manufacture method thereof of potter's clay modification, the massfraction ratio that this CABLE MATERIALS forms is: 40~70 parts of ethylene-vinyl acetate copolymers, 20~40 parts of linear low density polyethylenes, 10~20 parts of high molecular weight compatibilizers, 130~160 parts of fire retardants, 5~20 parts of synergistic flame retardants, 2~4 parts of surface treatment agents, 0.5~1 part, oxidation inhibitor, 5~7 parts of black masterbatchs, 1~4 part of processing aid; Characteristics and advantages of the present invention is: good flame retardant properties, resistance toheat, mechanical property, resistance to cracking energy, not halogen-containing preferably, low cigarette, low toxicity, environmental friendliness.
In the present invention, term " contains " or " comprising " represents that various compositions can be applied in mixture of the present invention or composition together.Therefore, term " mainly by ... form " and " by ... composition " be included in that term " contains " or in " comprising ".
Below describe in detail to various aspects of the present invention:
The low smoke and zero halogen power cable sheath material of potter's clay modification
A first aspect of the present invention provides a kind of low smoke and zero halogen power cable sheath material of potter's clay modification, it comprises following component: ethylene-vinyl acetate copolymer, linear low density polyethylene, high molecular weight compatibilizer, fire retardant, synergistic flame retardant, surface treatment agent, oxidation inhibitor, black masterbatch and processing aid, and the massfraction of each component is:
Wherein, in described fire retardant, contain barium sulfate;
Described synergistic flame retardant contains potter's clay.
At present the CABLE MATERIALS of high flame resistance is to adopt high method of filling mostly, but high filling brought mechanical property poor, resistance to cracking can be poor etc. many problems, cracking, electric leakage in use, brought hidden danger to public safety.And that the present invention adopts between fire retardant and synergistic flame retardant is collaborative, coordinate ethylene-vinyl acetate copolymer, linear low density polyethylene, make the flame retardant properties of gained resistance sheath material good, and good mechanical property, resistance to cracking can be also very good.
The CABLE MATERIALS of preparation of the present invention can be passed through JB/T10707 standard.
In addition the cable that the CABLE MATERIALS that, prepared by the present invention obtains is fire-retardant by the bunchy C class in IEC60332-3-24.
The present invention possesses following characteristics and advantages simultaneously: higher mechanical property (in optimum embodiment, tensile strength reaches 12.5MPa); Good flame retardant properties; There is good resistance to cracking energy (150 ℃ of thermal shock tests), low cigarette, low toxicity, environmental protection; The formula of this CABLE MATERIALS, through a series of adjustment, has good melting index in addition, and hardness and moment of torsion are more suitable, have good processing characteristics.
In a specific embodiment of the present invention, it is comprised of following component: ethylene-vinyl acetate copolymer, linear low density polyethylene, high molecular weight compatibilizer, fire retardant, synergistic flame retardant, surface treatment agent, oxidation inhibitor, black masterbatch and processing aid, and the massfraction of each component is:
Wherein, in described fire retardant, contain barium sulfate;
Described synergistic flame retardant contains potter's clay.
In a specific embodiment of the present invention, wherein, in described ethylene-vinyl acetate copolymer, the mass percentage content of its vinyl acetate is 20~40%, and melting index is 3~7g/min.Described embodiment makes processing characteristics better.
Preferably, described high molecular weight compatibilizer is one or both in maleic anhydride graft terpolymer EP rubber, maleic anhydride grafted polyethylene or maleated ethylene vinyl acetate copolyme.
In a specific embodiment of the present invention, in order to coordinate with other components better, wherein, described high molecular weight compatibilizer is maleated ethylene vinyl acetate copolyme.
In a specific embodiment of the present invention, in order to coordinate with other components better, wherein, described surface treatment agent is one or both in stearic acid, Zinic stearas or silane coupling agent;
Preferably, the surface treatment agent of employing is silane coupling agent.
In a specific embodiment of the present invention, in order to coordinate with other components better, wherein, described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, 4, one or more in 4 '-thiobis (6-tertiary butyl meta-cresol), β-(4-hydroxyl-3,5-di-tert-butyl-phenyl) positive octadecyl ester of propionic acid, Tyox B or thio-2 acid two (18) ester.
Preferably, the oxidation inhibitor of employing is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and Tyox Bs (proportioning is 5: 7).Described embodiment and other component synergetic propertyes are better.
In a specific embodiment of the present invention, in order to coordinate with other components better, wherein, described processing aid is a kind of in paraffin, polyethylene wax or ethylene bis stearic acid amide.
Preferably, the processing aid of employing is polyethylene wax.
In a specific embodiment of the present invention, wherein, described fire retardant is is barium sulfate and the coordinating of other flame retardant compositions, and wherein said other fire retardants are selected from one or more in aluminium hydroxide, magnesium hydroxide.Preferably, the addition that described barium sulfate accounts for described fire retardant is 0.3~15%, with the total weight of fire retardant, and preferably 5~8%.
In a specific embodiment of the present invention, wherein, described synergistic flame retardant is potter's clay, or the coordinating of potter's clay and other synergistic flame retardants, and described synergistic flame retardant is selected from one or more in zinc oxide, polynite.
Preparation method
A second aspect of the present invention provides the preparation method of the low smoke and zero halogen power cable sheath material of a kind of potter's clay modification of the present invention, and described method comprises the steps:
Supply raw materials; Comprise:
Ethylene-vinyl acetate copolymer, linear low density polyethylene, high molecular weight compatibilizer, fire retardant, synergistic flame retardant, surface treatment agent, oxidation inhibitor, black masterbatch and processing aid, the massfraction of each component is:
Wherein, in described fire retardant, contain barium sulfate;
Described synergistic flame retardant contains potter's clay;
Raw material is prepared burden by the proportioning of each component, together put into the abundant mixing that high-speed mixer carries out 5 ± 1min, then add successively twin screw and single screw extrusion machine to carry out extruding pelletization; The temperature of screw rod is: 110~130 ℃ of feeding sections, 125~145 ℃ of transportation sections, 135~160 ℃ of fluxing zones, 130~150 ℃ of heads.
Described twin screw and single screw extrusion machine all well known to a person skilled in the art.
Preferred embodiment
A low smoke and zero halogen power cable sheath material for potter's clay modification, the component that it comprises following massfraction:
Wherein:
The low smoke and zero halogen power cable sheath material of described a kind of potter's clay modification, described ethylene-vinyl acetate copolymer, the mass percentage content of its vinyl acetate is 20~40%, melting index is 3~7g/min.
The low smoke and zero halogen power cable sheath material of described a kind of potter's clay modification, described high molecular weight compatibilizer is one or both in maleic anhydride graft terpolymer EP rubber, maleic anhydride grafted polyethylene or maleated ethylene vinyl acetate copolyme.
The low smoke and zero halogen power cable sheath material of described a kind of potter's clay modification, described fire retardant is one or more in aluminium hydroxide, magnesium hydroxide or barium sulfate.
The low smoke and zero halogen power cable sheath material of described a kind of potter's clay modification, described synergistic flame retardant is one or more in zinc oxide, potter's clay, polynite.
The low smoke and zero halogen power cable sheath material of described a kind of potter's clay modification, described surface treatment agent is one or both in stearic acid, Zinic stearas or silane coupling agent.
The low smoke and zero halogen power cable sheath material of described a kind of potter's clay modification, described oxidation inhibitor is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester, 4, one or more in 4 '-thiobis (6-tertiary butyl meta-cresol), β-(4-hydroxyl-3,5-di-tert-butyl-phenyl) positive octadecyl ester of propionic acid, Tyox B or thio-2 acid two (18) ester.
The low smoke and zero halogen power cable sheath material of described a kind of potter's clay modification, described processing aid is a kind of in paraffin, polyethylene wax or ethylene bis stearic acid amide.
The present invention presses following step manufacture:
Raw material is prepared burden by the proportioning of each component, together put into the abundant mixing that high-speed mixer carries out 5min, then add successively twin screw and single screw extrusion machine to carry out extruding pelletization.The temperature of screw rod is: 110~130 ℃ of feeding sections, 125~145 ℃ of transportation sections, 135~160 ℃ of fluxing zones, 130~150 ℃ of heads.
most preferred embodiment of the present invention
In most preferred embodiment of the present invention, the high molecular weight compatibilizer of employing is maleic anhydride grafted polyethylene; The synergistic flame retardant adopting is potter's clay; The surface treatment agent adopting is silane coupling agent; The oxidation inhibitor adopting is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and Tyox Bs (proportioning is 5:7); The processing aid adopting is polyethylene wax.
This embodiment has been chosen suitable ethylene-vinyl acetate copolymer and surface treatment agent, uses barium sulfate to strengthen mechanical property, has also added appropriate synergistic flame retardant, obtains a kind of low smoke and zero halogen power cable sheath material and manufacture method thereof of potter's clay modification.Compare with other material, the present invention possesses following characteristics and advantages simultaneously: higher mechanical property (tensile strength reaches 12.5MPa); Good flame retardant properties; There is good resistance to cracking energy (150 ℃ of thermal shock tests), low cigarette, low toxicity, environmental protection; The formula of this CABLE MATERIALS, through a series of adjustment, has good melting index in addition, and hardness and moment of torsion are more suitable, have good processing characteristics.
As no specific instructions, various raw material of the present invention all can obtain by commercially available; Or prepare according to the ordinary method of this area.Unless otherwise defined or described herein, the familiar same meaning of all specialties used herein and scientific words and those skilled in the art.In addition any method similar or impartial to described content and material all can be applicable in the inventive method.
Other aspects of the present invention, due to disclosure herein, are apparent to those skilled in the art.
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.The experimental technique of unreceipted actual conditions in the following example, measures according to national standard conventionally.If there is no corresponding national standard, according to general international standard, normal condition or the condition of advising according to manufacturer, carry out.Unless otherwise indicated, otherwise all umbers are weight part, and all per-cents are weight percentage, and described polymericular weight is number-average molecular weight.
Unless otherwise defined or described herein, the familiar same meaning of all specialties used herein and scientific words and those skilled in the art.In addition any method similar or impartial to described content and material all can be applicable in the inventive method.
Embodiment
Embodiments of the invention and comparative example formula for raw stock are in Table 1.
Table 1 this low smoke and zero halogen power cable sheath material embodiment and comparative example formula (umber)
Wherein:
The high molecular weight compatibilizer that comparative example 1 adopts is maleic anhydride grafted polyethylene; The synergistic flame retardant adopting is potter's clay; The surface treatment agent adopting is silane coupling agent; The oxidation inhibitor adopting is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester; The processing aid adopting is paraffin and ethylene bis stearic acid amide (proportioning is 1: 1).
The high molecular weight compatibilizer that embodiment 1 adopts is maleic anhydride grafted polyethylene; The synergistic flame retardant adopting is potter's clay; The surface treatment agent adopting is silane coupling agent; The oxidation inhibitor adopting is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester; The processing aid adopting is paraffin and ethylene bis stearic acid amide (proportioning is 1: 1).
The high molecular weight compatibilizer that embodiment 2 adopts is maleated ethylene vinyl acetate copolyme; The synergistic flame retardant adopting is potter's clay, zinc oxide and polynite; The surface treatment agent adopting is aluminate coupling agent; The oxidation inhibitor adopting is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and Tyox Bs (proportioning is 5: 7); The processing aid adopting is paraffin and polyethylene wax (proportioning is 1: 1).
The high molecular weight compatibilizer that embodiment 3 adopts is maleic anhydride grafted polyethylene; The synergistic flame retardant adopting is potter's clay and zinc oxide; The surface treatment agent adopting is silane coupling agent; The oxidation inhibitor adopting is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and Tyox Bs (proportioning is 5: 7); The processing aid adopting is paraffin and polyethylene wax (proportioning is 1: 1).
The high molecular weight compatibilizer that comparative example 2 adopts is maleic anhydride grafted polyethylene; The surface treatment agent adopting is silane coupling agent and Zinic stearas (proportioning is 5: 1); The oxidation inhibitor adopting is β-(4-hydroxyl-3,5-di-tert-butyl-phenyl) positive octadecyl ester of propionic acid; The processing aid adopting is paraffin.
The high molecular weight compatibilizer that embodiment 4 adopts is maleic anhydride grafted polyethylene; The synergistic flame retardant adopting is potter's clay; The surface treatment agent adopting is silane coupling agent; The oxidation inhibitor adopting is four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and Tyox Bs (proportioning is 5: 7); The processing aid adopting is polyethylene wax.
Embodiment and comparative example all adopt following manufacture method:
Raw material is prepared burden by the proportioning of each component, together put into the abundant mixing that high-speed mixer carries out 5min, then add successively twin screw and single screw extrusion machine to carry out extruding pelletization.The temperature of screw rod is: 110~130 ℃ of feeding sections, 125~145 ℃ of transportation sections, 135~160 ℃ of fluxing zones, 130~150 ℃ of heads.
The CABLE MATERIALS performance of embodiment and comparative example is in Table 2.
The performance of each embodiment of table 2 and comparative example CABLE MATERIALS
Wherein embodiment 4 is most preferred embodiment, and its performance is separately in Table 3.
The performance of table 3 embodiment 4
Sequence number |
Performance |
Unit |
Embodiment 5 |
1 |
Tensile strength |
MPa |
12.54 |
2 |
Elongation at break |
% |
155.92 |
3 |
Air heat ageing test (100 ℃, 168h) |
/ |
/ |
3.1 |
Tensile strength retention rate |
% |
97.1 |
3.2 |
Reserved elongation at break |
% |
93.8 |
4 |
Melting index |
g/10min |
8.4 |
5 |
Density |
g/cm3 |
1.521 |
6 |
Thermal shock test (150 ℃, 1h) |
/ |
By |
7 |
The burning of IEC60332-3-24 bunchy |
/ |
C class |
8 |
Low temperature brittleness (25 ℃) |
Failure number |
4/30 |
9 |
Volume specific resistance (20 ℃) |
Ω·m |
1.08*10
12 |
10 |
Dielectric strength |
MV/m |
25 |
11 |
Smoke density (nonflame) |
/ |
137 |
12 |
Oxygen index |
% |
39 |
13 |
Halogen acid gas content |
mg/g |
1.1 |
14 |
PH value |
/ |
5.6 |
15 |
Specific conductivity |
μs/mm |
1 |
16 |
Poison exponent |
/ |
1.8 |
The foregoing is only preferred embodiment of the present invention, not in order to limit essence technology contents scope of the present invention, essence technology contents of the present invention is to be broadly defined in the claim scope of application, any technology entity or method that other people complete, if defined identical with the claim scope of application, also or a kind of change of equivalence, all will be regarded as being covered by among this claim scope.
All documents of mentioning in the present invention are all quoted as a reference in this application, just as each piece of document, are quoted as a reference separately.In addition should be understood that, after having read foregoing of the present invention, those skilled in the art can make various changes or modifications the present invention, these equivalent form of values fall within the application's appended claims limited range equally.