CN114334249A - Heat-resistant flame-retardant wire and cable material and preparation method thereof - Google Patents
Heat-resistant flame-retardant wire and cable material and preparation method thereof Download PDFInfo
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- CN114334249A CN114334249A CN202210006717.1A CN202210006717A CN114334249A CN 114334249 A CN114334249 A CN 114334249A CN 202210006717 A CN202210006717 A CN 202210006717A CN 114334249 A CN114334249 A CN 114334249A
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- 239000003063 flame retardant Substances 0.000 title claims abstract description 87
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000000463 material Substances 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 17
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 9
- 239000003292 glue Substances 0.000 claims abstract description 8
- 230000017525 heat dissipation Effects 0.000 claims abstract description 5
- 239000003085 diluting agent Substances 0.000 claims description 25
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 24
- 239000004970 Chain extender Substances 0.000 claims description 15
- 239000000945 filler Substances 0.000 claims description 15
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 13
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000003054 catalyst Substances 0.000 claims description 12
- 239000003431 cross linking reagent Substances 0.000 claims description 12
- 239000003112 inhibitor Substances 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 12
- 229910052697 platinum Inorganic materials 0.000 claims description 12
- 238000006116 polymerization reaction Methods 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 12
- 239000010453 quartz Substances 0.000 claims description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 12
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 230000003014 reinforcing effect Effects 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 7
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 3
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 3
- 230000000181 anti-adherent effect Effects 0.000 claims description 3
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 235000011187 glycerol Nutrition 0.000 claims description 3
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 3
- 238000004898 kneading Methods 0.000 claims description 3
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 3
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 3
- 239000000347 magnesium hydroxide Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 3
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 239000004945 silicone rubber Substances 0.000 claims description 3
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 claims description 3
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 25
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
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- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a heat-resistant flame-retardant wire and cable material and a preparation method thereof, wherein the heat-resistant flame-retardant wire and cable material comprises a filling layer, inner liners are bonded to the circumferential outer wall of the filling layer and are distributed equidistantly, the outer wall of each inner liner and the outer wall of the filling layer are bonded with the same inner sheath, an armored aluminum alloy tape is bonded to the circumferential outer wall of each inner sheath, an outer sheath is bonded to the circumferential outer wall of each armored aluminum alloy tape, a covering glue layer is bonded to the circumferential outer wall of each outer sheath, wrapping shielding layers are arranged in the middle positions inside the inner liners, cable cores are arranged on the inner walls of the wrapping shielding layers, and heat dissipation glue layers are bonded to the circumferential outer wall of each wrapping shielding layer and the inner wall of each inner liner. The invention can quickly generate a high-strength heat-resistant flame-retardant structure, enhance the mechanical toughness of the cable sheath after flame combustion, improve the heat-resistant flame-retardant performance of the cable, also form a double-layer heat-resistant flame-retardant sheath structure of the inner sheath and the outer sheath, and fully and effectively prevent flame spread and secondary damage in fire.
Description
Technical Field
The invention relates to the technical field of wires and cables, in particular to a heat-resistant flame-retardant wire and cable material and a preparation method thereof.
Background
Wire and cable refers to materials used in power, electrical and related transmission applications. "wires" and "cables" are not strictly defined. Products with small number of cores, small product diameter and simple structure are generally called wires, products without insulation are called bare wires, and other products are called cables; larger (greater than 6 square millimeters) conductor cross-sectional areas are referred to as large cables, and smaller (less than or equal to 6 square millimeters) conductors are referred to as small wires, also referred to as patch wires. The electric wire cable mainly comprises a bare wire, a cloth wire, a power cable for electric equipment, a cross-linked cable and a communication optical cable.
Through retrieval, chinese patent publication No. CN112309621A discloses a heat-resistant flame-retardant control cable, which comprises a heat-resistant flame-retardant sheath, a shielding layer, a plurality of inner cable cores and a reinforcing core from outside to inside in sequence, wherein the reinforcing core is located at the center of the control cable, the plurality of inner cable cores are distributed outside the reinforcing core, and a filling layer is filled in the gap between the reinforcing core and the inner cable cores. The above patents suffer from the following disadvantages: the heat-resistant flame-retardant sheath of the cable has poor performance, so that a heat-resistant flame-retardant wire and cable material and a preparation method thereof are urgently needed to solve the problems.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a heat-resistant flame-retardant wire and cable material and a preparation method thereof.
The invention provides a heat-resistant flame-retardant wire and cable material which comprises a filling layer, wherein inner liners are bonded to the circumferential outer wall of the filling layer and are distributed equidistantly, the outer wall of each inner liner and the outer wall of the filling layer are bonded to form a same inner sheath, an armored aluminum alloy tape is bonded to the circumferential outer wall of each inner sheath, an outer sheath is bonded to the circumferential outer wall of each armored aluminum alloy tape, a covering glue layer is bonded to the circumferential outer wall of each outer sheath, a wrapping shielding layer is arranged in the middle of the inside of each inner liner, a cable core is arranged on the inner wall of each wrapping shielding layer, a heat dissipation glue layer is bonded to the circumferential outer wall of each wrapping shielding layer and the inner wall of each inner liner, a through hole is formed in the middle of the filling layer, reinforcing ropes are bonded to the inner wall of the through hole, and the outer sheaths and the inner sheaths are both made of heat-resistant blocking materials.
Preferably, the raw materials of the outer sheath and the inner sheath comprise the following components in parts by weight: PVC60-100 parts, diluent 6-10 parts, quartz powder 6-10 parts, chain extender 6-10 parts, halogen-free flame retardant 6-10 parts, cross-linking agent 6-10 parts, platinum catalyst 1-5 parts, phenol polymerization inhibitor 1-5 parts and flame-retardant filler 10-50 parts.
Preferably, the PVC is set to be a high-temperature vulcanized silicone rubber material, and the halogen-free flame retardant is set to be an organic silicon flame retardant material.
Preferably, the diluent is provided as one of a UV-SG diluent, PP-treated water, a UV-SL diluent, a UV-SB diluent, a UV-SW diluent, or an LD anti-adhesive paste, etc.
Preferably, the chain extender is provided as one of 1, 4-butanediol, 1, 6-hexanediol, glycerol, trimethylolpropane, diethylene glycol, triethylene glycol or neopentyl glycol, etc.
Preferably, the flame-retardant filler is provided as one of aluminum hydroxide, magnesium hydroxide, antimony oxide, zinc borate, or the like.
A preparation method of a heat-resistant flame-retardant wire and cable comprises the following steps:
s1: weighing the raw materials according to the weight part ratio, sequentially putting quartz powder, a halogen-free flame retardant, a platinum catalyst, a phenolic polymerization inhibitor and a heat-resistant filler into a sealed stirrer with a heating component, stirring for 10-15min, setting the temperature inside the stirrer to be 40-50 ℃ through the heating component, standing for 15min after stirring is finished, and taking out the mixture for later use;
s2: putting weighed PVC into a hot melting machine, setting the temperature in the hot melting machine to be always kept above 150 ℃, and carrying out stirring and melting treatment, wherein the duration of continuous melting and stirring is 30 min;
s3: the mixture prepared in the step S1, a diluent, a chain extender and a cross-linking agent are sequentially put into a kneader, the molten PVC prepared in the step S2 is injected into the kneader, the temperature in the kneader is always kept at 100-150 ℃, and the kneading is continuously carried out for 50min-1 h;
s4: and (4) introducing the mixture consisting of all the raw materials prepared in the step (S3) into a plasticizing extruder, placing the middle part of the wire and cable into the plasticizing extruder, carrying out preparation treatment on the heat-resistant flame-retardant wire and cable through the plasticizing extruder to obtain the heat-resistant flame-retardant sheath, and cooling and molding the heat-resistant flame-retardant sheath after extrusion molding in low-temperature water.
S5: and (4) performing one-time extrusion molding treatment on the heat-resistant flame-retardant sheath prepared in the step S4 to form the wire and cable structure of the double-layer heat-resistant flame-retardant sheath material.
The beneficial effects of the invention are as follows:
according to the heat-resistant flame-retardant wire and cable, the high-strength heat-resistant flame-retardant structure is rapidly generated by adding the quartz powder, the chain extender, the halogen-free flame retardant, the cross-linking agent, the platinum catalyst, the phenol polymerization inhibitor and the flame-retardant filler, the mechanical toughness of a cable sheath after flame combustion is enhanced, the heat-resistant flame-retardant performance of the cable is improved, the double-layer heat-resistant flame-retardant sheath structure of the inner sheath and the outer sheath is also formed, and flame spread and secondary damage in fire are fully and effectively prevented.
Drawings
FIG. 1 is a schematic view of the overall structure of a heat-resistant flame-retardant wire and cable material and a preparation method thereof according to the present invention;
fig. 2 is a schematic front sectional structural view of a heat-resistant flame-retardant wire and cable material and a preparation method thereof according to the present invention.
In the figure: 1. covering the adhesive layer; 2. an outer sheath; 3. armouring an aluminium alloy strip; 4. an inner sheath; 5. an inner liner layer; 6. a heat dissipation adhesive layer; 7. wrapping a shielding layer; 8. a filling layer; 9. a cable core; 10. and reinforcing the ropes.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Example 1
Referring to fig. 1-2, a heat-resistant flame-retardant wire and cable material, including filling layer 8, the circumference outer wall of filling layer 8 bonds and has inner liner 5 that the equidistance distributes, and the outer wall of inner liner 5 bonds and has same inner sheath 4 with the outer wall of filling layer 8, the circumference outer wall of inner sheath 4 bonds and has armor aluminum alloy area 3, and the circumference outer wall of armor aluminum alloy area 3 bonds and has oversheath 2, the circumference outer wall of oversheath 2 bonds and has cover glue film 1, the inside intermediate position of inner liner 5 has all been opened around package shielding layer 7, and the inner wall around package shielding layer 7 is provided with cable core 9, it has heat dissipation glue film 6 to bond around package shielding layer 7's circumference outer wall and inner wall of inner liner 5, the intermediate position of filling layer 8 is opened there is the through-hole, and the inner wall of through-hole bonds and has reinforcing rope 10, oversheath 2 and inner sheath 4 all set up to heat-resistant barrier material.
Further, the outer sheath 2 and the inner sheath 4 comprise the following raw materials in parts by weight: 60 parts of PVC, 6 parts of diluent, 6 parts of quartz powder, 6 parts of chain extender, 6 parts of halogen-free flame retardant, 6 parts of cross-linking agent, 1 part of platinum catalyst, 1 part of phenolic polymerization inhibitor and 10 parts of flame-retardant filler.
Further, PVC is set as a high-temperature vulcanized silicone rubber material, and the halogen-free flame retardant is set as an organic silicon flame retardant material.
Further, the diluent is set to one of UV-SG diluent, PP-treated water, UV-SL diluent, UV-SB diluent, UV-SW diluent, LD anti-adhesive paste, or the like.
Further, the chain extender is provided as one of 1, 4-butanediol, 1, 6-hexanediol, glycerin, trimethylolpropane, diethylene glycol, triethylene glycol, neopentyl glycol, or the like.
Further, the flame-retardant filler is set to one of aluminum hydroxide, magnesium hydroxide, antimony oxide, zinc borate, or the like.
A preparation method of a heat-resistant flame-retardant wire and cable comprises the following steps:
s1: weighing the raw materials according to the weight part ratio, sequentially putting quartz powder, a halogen-free flame retardant, a platinum catalyst, a phenolic polymerization inhibitor and a heat-resistant filler into a sealed stirrer with a heating component, stirring for 10-15min, setting the temperature inside the stirrer to be 40-50 ℃ through the heating component, standing for 15min after stirring is finished, and taking out the mixture for later use;
s2: putting weighed PVC into a hot melting machine, setting the temperature in the hot melting machine to be always kept above 150 ℃, and carrying out stirring and melting treatment, wherein the duration of continuous melting and stirring is 30 min;
s3: the mixture prepared in the step S1, a diluent, a chain extender and a cross-linking agent are sequentially put into a kneader, the molten PVC prepared in the step S2 is injected into the kneader, the temperature in the kneader is always kept at 100-150 ℃, and the kneading is continuously carried out for 50min-1 h;
s4: and (4) introducing the mixture consisting of all the raw materials prepared in the step (S3) into a plasticizing extruder, placing the middle part of the wire and cable into the plasticizing extruder, carrying out preparation treatment on the heat-resistant flame-retardant wire and cable through the plasticizing extruder to obtain the heat-resistant flame-retardant sheath, and cooling and molding the heat-resistant flame-retardant sheath after extrusion molding in low-temperature water.
S5: and (4) performing one-time extrusion molding treatment on the heat-resistant flame-retardant sheath prepared in the step S4 to form the wire and cable structure of the double-layer heat-resistant flame-retardant sheath material.
Example 2, a heat-resistant flame-retardant wire and cable material, compared to example 1, the raw materials of the outer sheath 2 and the inner sheath 4 comprise the following components in parts by weight: 70 parts of PVC, 7 parts of diluent, 7 parts of quartz powder, 7 parts of chain extender, 7 parts of halogen-free flame retardant, 7 parts of cross-linking agent, 2 parts of platinum catalyst, 2 parts of phenolic polymerization inhibitor and 20 parts of flame-retardant filler.
The heat-resistant flame-retardant electric wire and cable in this example was produced in the same manner as the heat-resistant flame-retardant electric wire and cable in example 1.
Example 3, a heat-resistant flame-retardant wire and cable material, compared to example 1, the raw materials of the outer sheath 2 and the inner sheath 4 comprise the following components in parts by weight: 80 parts of PVC, 8 parts of diluent, 8 parts of quartz powder, 8 parts of chain extender, 8 parts of halogen-free flame retardant, 8 parts of cross-linking agent, 3 parts of platinum catalyst, 3 parts of phenolic polymerization inhibitor and 30 parts of flame-retardant filler.
The heat-resistant flame-retardant electric wire and cable in this example was produced in the same manner as the heat-resistant flame-retardant electric wire and cable in example 1.
Example 4, a heat-resistant flame-retardant wire and cable material, compared to example 1, the raw materials of the outer sheath 2 and the inner sheath 4 comprise the following components in parts by weight: 90 parts of PVC, 9 parts of diluent, 9 parts of quartz powder, 9 parts of chain extender, 9 parts of halogen-free flame retardant, 9 parts of cross-linking agent, 4 parts of platinum catalyst, 4 parts of phenolic polymerization inhibitor and 40 parts of flame-retardant filler.
The heat-resistant flame-retardant electric wire and cable in this example was produced in the same manner as the heat-resistant flame-retardant electric wire and cable in example 1.
Example 5, a heat-resistant flame-retardant wire and cable material, compared to example 1, the raw materials of the outer sheath 2 and the inner sheath 4 comprise the following components in parts by weight: 100 parts of PVC, 10 parts of diluent, 10 parts of quartz powder, 10 parts of chain extender, 10 parts of halogen-free flame retardant, 10 parts of cross-linking agent, 5 parts of platinum catalyst, 5 parts of phenolic polymerization inhibitor and 50 parts of flame-retardant filler.
The heat-resistant flame-retardant electric wire and cable in this example was produced in the same manner as the heat-resistant flame-retardant electric wire and cable in example 1.
In conclusion, the heat-resistant flame-retardant wire and cable disclosed by the invention can quickly generate a high-strength heat-resistant flame-retardant structure through the added quartz powder, the chain extender, the halogen-free flame retardant, the cross-linking agent, the platinum catalyst, the phenol polymerization inhibitor and the flame-resistant filler, so that the mechanical toughness of a cable sheath after flame combustion is enhanced, the heat-resistant flame-retardant performance of the cable is improved, a double-layer heat-resistant flame-retardant sheath structure with an inner sheath and an outer sheath is also formed, and the flame spread and the secondary damage in fire are fully and effectively prevented.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. The heat-resistant flame-retardant wire and cable material comprises a filling layer (8) and is characterized in that an inner liner (5) distributed equidistantly is bonded to the outer wall of the filling layer (8), a same inner sheath (4) is bonded to the outer wall of the inner liner (5) and the outer wall of the filling layer (8), an armored aluminum alloy strip (3) is bonded to the outer wall of the inner sheath (4), an outer sheath (2) is bonded to the outer wall of the armored aluminum alloy strip (3), a covering glue layer (1) is bonded to the outer wall of the outer sheath (2), a wrapping shielding layer (7) is arranged at the inner middle position of the inner liner (5), a cable core (9) is arranged on the inner wall of the wrapping shielding layer (7), a heat dissipation glue layer (6) is bonded to the outer wall of the wrapping shielding layer (7) and the inner wall of the inner liner (5), and a through hole is formed at the middle position of the filling layer (8), and the inner wall of the through hole is bonded with a reinforcing rope (10), and the outer sheath (2) and the inner sheath (4) are both made of heat-resistant blocking materials.
2. The heat-resistant flame-retardant wire and cable material as claimed in claim 1, wherein the raw materials of the outer sheath (2) and the inner sheath (4) comprise the following components in parts by weight: PVC60-100 parts, diluent 6-10 parts, quartz powder 6-10 parts, chain extender 6-10 parts, halogen-free flame retardant 6-10 parts, cross-linking agent 6-10 parts, platinum catalyst 1-5 parts, phenol polymerization inhibitor 1-5 parts and flame-retardant filler 10-50 parts.
3. A heat-resistant flame-retardant wire and cable material as claimed in claim 2, wherein the PVC is made of high-temperature vulcanized silicone rubber, and the halogen-free flame retardant is made of silicone flame retardant.
4. A heat-resistant flame-retardant electric wire and cable material according to claim 2, wherein the diluent is provided as one of UV-SG diluent, PP-treated water, UV-SL diluent, UV-SB diluent, UV-SW diluent, LD anti-adhesive paste, or the like.
5. A heat-resistant flame-retardant electric wire and cable material as claimed in claim 2, wherein said chain extender is one selected from 1, 4-butanediol, 1, 6-hexanediol, glycerin, trimethylolpropane, diethylene glycol, triethylene glycol and neopentyl glycol.
6. A heat-resistant flame-retardant electric wire and cable material as claimed in claim 2, wherein the flame-retardant filler is one of aluminum hydroxide, magnesium hydroxide, antimony oxide, zinc borate, etc.
7. A method for preparing a heat-resistant flame-retardant electric wire and cable according to claims 1-6, characterized by comprising the following steps:
s1: weighing the raw materials according to the weight part ratio, sequentially putting quartz powder, a halogen-free flame retardant, a platinum catalyst, a phenolic polymerization inhibitor and a heat-resistant filler into a sealed stirrer with a heating component, stirring for 10-15min, setting the temperature inside the stirrer to be 40-50 ℃ through the heating component, standing for 15min after stirring is finished, and taking out the mixture for later use;
s2: putting weighed PVC into a hot melting machine, setting the temperature in the hot melting machine to be always kept above 150 ℃, and carrying out stirring and melting treatment, wherein the duration of continuous melting and stirring is 30 min;
s3: the mixture prepared in the step S1, a diluent, a chain extender and a cross-linking agent are sequentially put into a kneader, the molten PVC prepared in the step S2 is injected into the kneader, the temperature in the kneader is always kept at 100-150 ℃, and the kneading is continuously carried out for 50min-1 h;
s4: and (4) introducing the mixture consisting of all the raw materials prepared in the step (S3) into a plasticizing extruder, placing the middle part of the wire and cable into the plasticizing extruder, carrying out preparation treatment on the heat-resistant flame-retardant wire and cable through the plasticizing extruder to obtain the heat-resistant flame-retardant sheath, and cooling and molding the heat-resistant flame-retardant sheath after extrusion molding in low-temperature water.
S5: and (4) performing one-time extrusion molding treatment on the heat-resistant flame-retardant sheath prepared in the step S4 to form the wire and cable structure of the double-layer heat-resistant flame-retardant sheath material.
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| CN202210006717.1A CN114334249A (en) | 2022-01-05 | 2022-01-05 | Heat-resistant flame-retardant wire and cable material and preparation method thereof |
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