CN109448895A - A kind of fireprotection layer and preparation method thereof for fireproof cable - Google Patents

A kind of fireprotection layer and preparation method thereof for fireproof cable Download PDF

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Publication number
CN109448895A
CN109448895A CN201811352817.XA CN201811352817A CN109448895A CN 109448895 A CN109448895 A CN 109448895A CN 201811352817 A CN201811352817 A CN 201811352817A CN 109448895 A CN109448895 A CN 109448895A
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China
Prior art keywords
fire prevention
molten magnesia
fire
electrically molten
fireproof cable
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Inventor
刘思明
王镇川
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Sichuan Chuan Sheng Cable Co Ltd
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Sichuan Chuan Sheng Cable Co Ltd
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Priority to CN201811352817.XA priority Critical patent/CN109448895A/en
Publication of CN109448895A publication Critical patent/CN109448895A/en
Pending legal-status Critical Current

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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
    • H01B7/02—Disposition of insulation
    • H01B7/0208—Cables with several layers of insulating material
    • H01B7/0225—Three or more layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/047—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material made of fibres or filaments
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/30—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing magnesium cements or similar cements
    • 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
    • H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
    • H01B7/282—Preventing penetration of fluid, e.g. water or humidity, into conductor or cable
    • 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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • 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
    • H01B7/29—Protection against damage caused by extremes of temperature or by flame
    • H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/206—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/73—Hydrophobic
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

The invention discloses a kind of fireprotection layers for fireproof cable, including fire prevention bottom, stick in the scrim cloth on fire prevention bottom, and the fire prevention surface layer being extruded on scrim cloth.Simultaneously, the invention also discloses a kind of production methods of fireprotection layer for fireproof cable, it is characterized in that, the following steps are included: step (1), electrically molten magnesia raw material is crushed to 40~80 mesh, it will crush after obtained electrically molten magnesia grinds 30~50 minutes in high speed centrifugation rotary-grinding machine, into magnetic separator magnetic separation, the ferromagnetism object impurity in electrically molten magnesia is removed, pure electrically molten magnesia powder is obtained；Step (2) volcanic ash is added in obtain pure electrically molten magnesia powder is stirred evenly, and the mixture of electrically molten magnesia powder and volcanic ash is transferred in rotary furnace and carries out 20~40min of baking with 700~850 DEG C, obtains anhydrous mixed resin.Fireprotection layer of the invention is the double-deck performance complementary design, with stronger insulation performance, fire resistance.

Description

A kind of fireprotection layer and preparation method thereof for fireproof cable
Technical field
The present invention relates to a kind of fireprotection layer and its technology of preparing, in particular to a kind of fireprotection layer for fireproof cable and its Production method.
Background technique
In recent years, the development of cable industry was swift and violent, and the competition of cable industry also increasingly motivates, cable performance become in order to The key that each cable manufacturing enterprise wins victory in the competition of excitation.The competition on fireproof cable especially motivates at present, anti-thermoelectricity Cable is also favored because it can keep the energization performance of certain time in the high temperature environment.And fireproof cable can be held in high temperature The continuous length of time being powered then depends on the fire protecting performance of " fireprotection layer ".
However, existing fireproof cable mostly adds aluminium oxide and silica material by magnesium oxide material by magnesia with fireprotection layer It is prepared, it is low that there are insulation performances, and the disadvantage of fire resistance difference is unable to satisfy the needs of current power grid construction.
Summary of the invention
That there are insulation performances it is an object of the invention to overcoming existing fireproof cable fireprotection layer is low, fire resistance is poor Defect, the insulation of existing fireprotection layer and the fireproof cable fireprotection layer of fire resistance difference can be solved by providing one kind.
Meanwhile providing a kind of production method of fireprotection layer for fireproof cable.
The purpose of the invention is achieved by the following technical solution: a kind of fireprotection layer for fireproof cable, including anti-ashes after a fire Layer sticks in the scrim cloth on fire prevention bottom, and the fire prevention surface layer being extruded on scrim cloth；
Fire prevention bottom includes the following parts by weight:
40~60 parts of volcanic ash, 8~15 parts of anhydrous magnesium sulfate, 4~10 parts of acrylic resin, electrically molten magnesia raw material 8~ 15 parts and 3~8 parts of polytetrafluoroethylene (PTFE)；
Fire prevention surface layer includes the following parts by weight:
15~30 parts of inorganic bond, 20~40 parts of crushed crude pearlite, 6~10 parts of organic silicone oil and fire-proof mud 25~40 Part.
Further, the inorganic bond is the ZS-1071 high temperature resistant inorganic adhesive of 400~1380 DEG C of resistance to temperature value.
The scrim cloth is that bulk density is the≤Ceramic silicon rubber band of 80kg/m3~200kg/m3, Ceramic silicon rubber Dielectric strength >=22kV/mm at 20 DEG C, volume resistivity >=2 × 1014 Ω cm, anti-flammability are V-0 grades.
The fire-proof mud is nonhazardous, scentless clay shape solid, the fire-proof mud presentation close kg/m3 :≤2.0 × 103.
A kind of production method of the fireprotection layer for fireproof cable, comprising the following steps:
Electrically molten magnesia raw material is crushed to 40~80 mesh by step (1), will crush obtained electrically molten magnesia high speed from After grinding 30~50 minutes in heart rotary-grinding machine, into magnetic separator magnetic separation, the ferromagnetism object impurity in electrically molten magnesia is removed, Obtain pure electrically molten magnesia powder；
Step (2), addition volcanic ash stirs evenly in obtaining pure electrically molten magnesia powder, by electrically molten magnesia powder and volcano The mixture of ash, which is transferred in rotary furnace, carries out 20~40min of baking with 700~850 DEG C, obtains anhydrous mixed resin；
Polytetrafluoroethylene (PTFE) progress quickly 5~10min of stirring is added in step (3) in obtained anhydrous mixed resin, obtains Fire prevention bottom siccative；
Step (4) will obtain fire prevention bottom siccative and be transferred in heating vessel, and is added after acrylic resin stirring with 60 ~80 DEG C carry out 20~40min of hot melt, add after anhydrous magnesium sulfate stirs evenly and are transferred to blank machine, and it is standby that fire prevention bottom is obtained after cooling With；
Step (5), will crushed crude pearlite and fire-proof mud mix after after mixing evenly, organic silicone oil is added and continues stirring to organic Silicone oil is fully absorbed by crushed crude pearlite and fire-proof mud, obtains fire prevention surface layer base initial material；
Step (6) will obtain fire prevention surface layer base initial material and be placed in heating vessel, and inorganic bond be added and stirs evenly, and With 20~30 DEG C of progress low temperature slurrying, it is spare to obtain fire prevention surface layer slurry；
Fire prevention bottom obtained in step (4) is placed in molding machine, and scrim cloth is laid in fire prevention by step (7) On bottom, fire prevention surface layer slurry obtained in step (6) is uniformly poured on scrim cloth, is prevented fires after squeezing cooling Layer.
Further, it is stirred in the step (2) using batch type method；Wherein, stop after stirring 10min 2min is repeated 2~4 times.
Further, being transferred in heating vessel for fire prevention bottom siccative will be obtained in the step (4) use blender Stir 10~30min；Using the pressure extrusion fire prevention surface layer slurry of 200kgf/cm in the step (7).
The present invention compared with the prior art, has the following advantages that and the utility model has the advantages that fireprotection layer use of the invention can be moisture-proof Fire-retardant scrim cloth is extruded in the fire prevention bottom on scrim cloth bottom with preferable fire retardant insulating performance, is extruded in fibre The fire prevention surface layer in layer of cloth surface layer with preferable fire resistance is tieed up, the fire prevention surface layer and fire prevention bottom can insulate well With the complementation of fire resistance, the existing fireprotection layer of very good solution haves the defects that insulation performance is low, fire resistance is poor.
Specific embodiment
The present invention is described in further detail below with reference to embodiment, but embodiments of the present invention are not limited to This.
Embodiment 1
A kind of fireprotection layer for fireproof cable of the present embodiment includes fire prevention bottom, sticks in the fiber on fire prevention bottom Layer of cloth, and the fire prevention surface layer being extruded on scrim cloth；
Fire prevention bottom includes the following parts by weight:
40 parts of volcanic ash, 8 parts of anhydrous magnesium sulfate, 4 parts of acrylic resin, 8 parts of electrically molten magnesia raw material and polytetrafluoroethyl-ne 3 parts of alkene；
Fire prevention surface layer includes the following parts by weight:
15 parts of inorganic bond, 20 parts of crushed crude pearlite, 6 parts of organic silicone oil and 25 parts of fire-proof mud.
Specifically, the inorganic bond is the ZS-1071 high temperature resistant inorganic adhesive of 400~1380 DEG C of resistance to temperature value.
The scrim cloth is that bulk density is the≤Ceramic silicon rubber band of 80kg/m3~200kg/m3, Ceramic silicon rubber Dielectric strength >=22kV/mm at 20 DEG C, volume resistivity >=2 × 1014 Ω cm, anti-flammability are V-0 grades.
The fire-proof mud is nonhazardous, scentless clay shape solid, the fire-proof mud presentation close kg/m3 :≤2.0 × 103.
Embodiment 2
The present embodiment and a kind of fireprotection layer structure for fireproof cable of embodiment 1 are essentially identical, and difference is:
Fire prevention bottom includes the following parts by weight:
50 parts of volcanic ash, 11 parts of anhydrous magnesium sulfate, 7 parts of acrylic resin, 11 parts of electrically molten magnesia raw material and polytetrafluoro 6 parts of ethylene；
Fire prevention surface layer includes the following parts by weight:
23 parts of inorganic bond, 30 parts of crushed crude pearlite, 8 parts of organic silicone oil and 35 parts of fire-proof mud.
Embodiment 3
The present embodiment and a kind of fireprotection layer structure for fireproof cable of embodiment 1 are essentially identical, and difference is:
Fire prevention bottom includes the following parts by weight:
60 parts of volcanic ash, 15 parts of anhydrous magnesium sulfate, 10 parts of acrylic resin, 15 parts of electrically molten magnesia raw material and poly- four 8 parts of vinyl fluoride；
Fire prevention surface layer includes the following parts by weight:
30 parts of inorganic bond, 40 parts of crushed crude pearlite, 10 parts of organic silicone oil and 40 parts of fire-proof mud.
Comparative example 1
The fireprotection layer of this comparative example comprises the following components in parts by weight:
6~12 parts of magnesia, 2~5 parts of organic silicone oil, 10~20 parts of toluene, 20~40 parts of calcium oxide, aluminium oxide 4~10 Part and 2~6 parts of iron oxide.
145mm is taken to be placed in 1000 DEG C the fireprotection layer in the fireprotection layer of Examples 1 to 3 and comparative example 1 under the same conditions 1 hour combustion testing is carried out under environment, test result is as shown in Table 1:
Table one
By above-mentioned table one as it can be seen that its comprehensive performance of the fireprotection layer of Examples 1 to 3 is superior to the fireprotection layer of comparative example 1；Its In, the comprehensive performance of the fireprotection layer of embodiment 3 is optimal.
Embodiment 4
The present embodiment is a kind of production method of fireprotection layer for fireproof cable of Examples 1 to 3, including following step It is rapid:
Electrically molten magnesia raw material is crushed to 40~80 mesh by step (1), will crush obtained electrically molten magnesia high speed from After grinding 30~50 minutes in heart rotary-grinding machine, into magnetic separator magnetic separation, the ferromagnetism object impurity in electrically molten magnesia is removed, Obtain pure electrically molten magnesia powder；
Step (2), addition volcanic ash stirs evenly in obtaining pure electrically molten magnesia powder, stops after stirring 10min 2min, repeat 2~4 times, then, by the mixture of electrically molten magnesia powder and volcanic ash be transferred in rotary furnace with 700~850 DEG C into Row bakes 20~40min, obtains anhydrous mixed resin；
Polytetrafluoroethylene (PTFE) progress quickly 5~10min of stirring is added in step (3) in obtained anhydrous mixed resin, obtains Fire prevention bottom siccative；
Step (4) will obtain fire prevention bottom siccative and be transferred in heating vessel, and be added acrylic resin stirring 10~ 20~40min of hot melt is carried out with 60~80 DEG C after 30min, adds after anhydrous magnesium sulfate stirs evenly and is transferred to blank machine, is obtained after cooling It is spare to fire prevention bottom；
Step (5), will crushed crude pearlite and fire-proof mud mix after after mixing evenly, organic silicone oil is added and continues stirring to organic Silicone oil is fully absorbed by crushed crude pearlite and fire-proof mud, obtains fire prevention surface layer base initial material；
Step (6) will obtain fire prevention surface layer base initial material and be placed in heating vessel, and inorganic bond be added and stirs evenly, and With 20~30 DEG C of progress low temperature slurrying, it is spare to obtain fire prevention surface layer slurry；
Fire prevention bottom obtained in step (4) is placed in molding machine, and scrim cloth is laid in fire prevention by step (7) On bottom, fire prevention surface layer slurry obtained in step (6) is uniformly poured on scrim cloth, using the pressure of 200kgf/cm Power obtains fireprotection layer after squeezing cooling.
As described above, the present invention can be implemented well.

Claims (7)

1. a kind of fireprotection layer for fireproof cable, which is characterized in that including bottom of preventing fires, stick in the fiber on fire prevention bottom Layer of cloth, and the fire prevention surface layer being extruded on scrim cloth；
Fire prevention bottom includes the following parts by weight:
Fire prevention surface layer includes the following parts by weight:
2. a kind of fireprotection layer for fireproof cable according to claim 1, which is characterized in that the inorganic bond is The ZS-1071 high temperature resistant inorganic adhesive of 400~1380 DEG C of resistance to temperature value.
3. a kind of fireprotection layer for fireproof cable according to claim 1, which is characterized in that the scrim cloth is to hold Weight is the≤Ceramic silicon rubber band of 80kg/m3~200kg/m3, dielectric strength >=22kV/ at 20 DEG C of Ceramic silicon rubber Mm, volume resistivity >=2 × 1014 Ω cm, anti-flammability are V-0 grades.
4. a kind of fireprotection layer for fireproof cable according to claim 1, which is characterized in that the fire-proof mud is nontoxic Harmful, scentless clay shape solid, the fire-proof mud presentation close kg/m3 :≤2.0 × 103.
5. a kind of production method of fireprotection layer for fireproof cable according to any one of claims 1 to 4, feature exist In, comprising the following steps:
Electrically molten magnesia raw material is crushed to 40~80 mesh by step (1), will be crushed obtained electrically molten magnesia and is revolved in high speed centrifugation Turn after being ground 30~50 minutes in sander, into magnetic separator magnetic separation, removes the ferromagnetism object impurity in electrically molten magnesia, obtain Pure electrically molten magnesia powder；
Step (2) volcanic ash is added in obtaining pure electrically molten magnesia powder is stirred evenly, by electrically molten magnesia powder and volcanic ash Mixture, which is transferred in rotary furnace, carries out 20~40min of baking with 700~850 DEG C, obtains anhydrous mixed resin；
Polytetrafluoroethylene (PTFE) progress quickly 5~10min of stirring is added in step (3) in obtained anhydrous mixed resin, is prevented fires Bottom siccative；
Step (4) will obtain fire prevention bottom siccative and be transferred in heating vessel, and is added after acrylic resin stirring with 60~80 DEG C 20~40min of hot melt is carried out, add after anhydrous magnesium sulfate stirs evenly and be transferred to blank machine, it is spare that fire prevention bottom is obtained after cooling；
Step (5) after mixing evenly, will be added organic silicone oil and continue stirring to organic silicone oil after crushed crude pearlite and fire-proof mud mixing It is fully absorbed by crushed crude pearlite and fire-proof mud, obtains fire prevention surface layer base initial material；
Step (6) will obtain fire prevention surface layer base initial material and be placed in heating vessel, and inorganic bond be added and stirs evenly, and with 20 It is spare to obtain fire prevention surface layer slurry for~30 DEG C of progress low temperature slurrying；
Fire prevention bottom obtained in step (4) is placed in molding machine, and scrim cloth is laid in fire prevention bottom by step (7) On, fire prevention surface layer slurry obtained in step (6) is uniformly poured on scrim cloth, obtains fireprotection layer after squeezing cooling.
6. a kind of production method of fireprotection layer for fireproof cable according to claim 5, which is characterized in that the step Suddenly it is stirred in (2) using batch type method；Wherein, stop 2min after stirring 10min, repeat 2~4 times.
7. a kind of production method of fireprotection layer for fireproof cable according to claim 6, which is characterized in that the step Suddenly being transferred in heating vessel for fire prevention bottom siccative being obtained in (4), 10~30min is stirred using blender；The step (7) The middle pressure extrusion fire prevention surface layer slurry using 200kgf/cm.
CN201811352817.XA 2018-11-14 2018-11-14 A kind of fireprotection layer and preparation method thereof for fireproof cable Pending CN109448895A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114188109A (en) * 2021-12-07 2022-03-15 辽宁嘉顺科技有限公司 Preparation method and application of magnesium oxide for high-impedance and high-voltage breakdown prevention mineral insulated cable

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CN2344844Y (en) * 1998-07-03 1999-10-20 唐崇书 Fire-proof sheath for cable
CN105566821A (en) * 2016-02-02 2016-05-11 安徽幸福电器电缆有限公司 Fireproof filling insulating layer formula for special cable
CN105801093A (en) * 2016-03-01 2016-07-27 广东鹏鹄实业有限公司 Coal ash high-temperature-resistant insulating material as well as preparation thereof and use
CN107112070A (en) * 2014-12-10 2017-08-29 耐克森公司 Cable or cable accessory with fireprotection layer

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CN1149534A (en) * 1995-11-02 1997-05-14 李学进 Fire-proof decorative board and its producing method
CN2344844Y (en) * 1998-07-03 1999-10-20 唐崇书 Fire-proof sheath for cable
CN107112070A (en) * 2014-12-10 2017-08-29 耐克森公司 Cable or cable accessory with fireprotection layer
CN105566821A (en) * 2016-02-02 2016-05-11 安徽幸福电器电缆有限公司 Fireproof filling insulating layer formula for special cable
CN105801093A (en) * 2016-03-01 2016-07-27 广东鹏鹄实业有限公司 Coal ash high-temperature-resistant insulating material as well as preparation thereof and use

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114188109A (en) * 2021-12-07 2022-03-15 辽宁嘉顺科技有限公司 Preparation method and application of magnesium oxide for high-impedance and high-voltage breakdown prevention mineral insulated cable
CN114188109B (en) * 2021-12-07 2024-05-10 辽宁嘉顺科技有限公司 Preparation method and application of magnesium oxide for high-impedance high-voltage breakdown prevention mineral insulated cable

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Application publication date: 20190308