CN114644774B - Composition for producing polycarbonate skeleton in cable and method for producing skeleton - Google Patents
Composition for producing polycarbonate skeleton in cable and method for producing skeleton Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2369/00—Characterised by the use of polycarbonates; Derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2425/02—Homopolymers or copolymers of hydrocarbons
- C08J2425/04—Homopolymers or copolymers of styrene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2467/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
Abstract
The invention relates to a composition for producing a polycarbonate skeleton in a cable and a method for manufacturing the skeleton. The composition for producing the polycarbonate skeleton in the cable core comprises the following raw materials in parts by weight: 100.0 parts of polycarbonate, 5.0 to 20.0 parts of polyethylene terephthalate reclaimed material, 3.0 to 20.0 parts of flame retardant, 0.2 to 1.0 parts of anti-dripping agent, 0.3 to 3.0 parts of chemical foaming agent and 0.2 to 4.0 parts of lubricant. The invention has reasonable design and simple and convenient operation, and the polycarbonate skeleton in the prepared data cable core has the characteristics of flame retardance and high strength, improves the transmission performance of the data cable and has low production cost.
Description
Technical Field
The invention relates to the technical field of communication cable materials, in particular to a composition for producing a polycarbonate skeleton in a data cable and a manufacturing method of the skeleton.
Background
The working frequency of the symmetrical data cable regulated by YD/T838 'symmetrical cable for digital communication' and other standards is raised to 2000MHz. The key indexes of the cable, namely the crosstalk and the transmission attenuation of the cable, which influence the transmission performance of the high-frequency signal, directly influence the signal-to-noise ratio of the signal, and determine the bandwidth of the transmission signal. For this reason, a skeleton separating each pair (typically 4 pairs for one cable) in a cable is generally introduced into the cable core structure of the data cable, thereby improving crosstalk attenuation between the pairs. Such backbones are generally cross-shaped, such as those commonly employed in the industry as shown in the patent documents CN101556843a and CN 105575512B. Therefore, the framework has certain strength and cannot be easily deformed, so that the position of the wire pair is kept stable.
In addition, the symmetrical cable has the characteristic of opening to the signal electromagnetic field, so the dielectric property of the material used by the framework will also influence the transmission attenuation performance of the cable pair.
On the other hand, as data cables are mostly used indoors, and some occasions are extremely sensitive to the safety of the cables, more and more strict requirements are also put on the flame retardance of the data cables.
At present, the data cable skeleton is made of polyolefin materials (such as high-density polyethylene, linear low-density polyethylene and polypropylene) consistent with the wire pair insulating materials, and is manufactured into a skeleton with a solid structure by adopting extrusion molding processing of a single-screw extruder. The processing technology is mature, the production efficiency is high, the processed skeleton has the characteristic of high elongation at break, and the transmission performance requirement of the super-six data cables can be met. However, the above materials and solid structures have the following drawbacks:
(1) The framework has no flame retardance, so that the difficulty of flame retardance of the cable is increased, a sheath material with good flame retardance has to be adopted, the thickness of the sheath is increased, and the cost of the cable material is greatly increased;
(2) The skeleton strength is insufficient, the skeleton is easy to deform, two measures have to be taken to compensate for the fact, namely, the thickness of the skeleton is increased, but the thickness of the skeleton has negative effects on the transmission attenuation and the flame retardance of the cable, the cable size is increased, and the cable installation cost in the cable manufacturing and comprehensive wiring processes is increased; the second is to reduce the twisting pitch of the wire pairs, but this will result in reduced efficiency of the wire pair twisting process and increased cable manufacturing costs.
Disclosure of Invention
The invention aims to solve the technical problems that: overcoming the defects in the prior art, and providing a composition for producing a polycarbonate skeleton in a cable and a method for manufacturing the skeleton.
The technical scheme adopted for solving the technical problems is as follows: a composition for producing a polycarbonate backbone in a cable, comprising the following raw materials in parts by weight:
further, the composition for producing a polycarbonate skeleton in a cable further comprises a nucleating agent in an amount of 0.2 to 1.0 parts by weight.
Further, the melt mass flow rate of the polycarbonate is 3-15 g/10min.
Further, the weight part of the polyethylene terephthalate reclaimed material is 8.0-12.0 parts.
Further, the flame retardant is a tri (2, 4-dibromophenyl) phosphate halogenated phosphate compound flame retardant, and the weight part of the flame retardant is 10-20.0 parts;
or the flame retardant is a brominated polymer flame retardant, and the weight part of the brominated polymer flame retardant is 3.0-12.0 parts.
Further, the weight part of the tri (2, 4-dibromophenyl) phosphate halogenated phosphate composite flame retardant is 12.0-15.0 parts; the brominated high polymer flame retardant is brominated polystyrene, and the weight part of the brominated high polymer flame retardant is 5.0-7.5 parts.
Further, the anti-dripping agent is polytetrafluoroethylene powder, SJ-D100S anti-dripping agent or DF-S10 anti-dripping agent, and the weight part of the anti-dripping agent is 0.3 to 0.6 part.
Further, the chemical foaming agent is a high-temperature foaming agent or a low-temperature foaming agent, and when the extrusion molding foaming temperature is more than or equal to 260 ℃, the chemical foaming agent is a high-temperature foaming agent; when the extrusion foaming temperature is less than 260 ℃, the chemical foaming agent adopts a low-temperature foaming agent.
Further, the lubricant is talcum powder or calcium stearate, and the weight part of the lubricant is 1.0-4.0 parts;
or the lubricant is a small molecular polymer, and the weight part of the lubricant is 0.2-0.5 part.
A method for manufacturing a skeleton, which uses the composition for producing polycarbonate skeleton in cable as raw material, comprises the following steps:
s1, weighing raw materials according to the parts by weight, adding the raw materials into a high-speed mixer, fully and uniformly stirring the raw materials to prepare a mixture, wherein the stirring time is 5-20 min, and the total weight of the mixture is more than or equal to 50kg each time;
s2, extrusion molding foaming, namely feeding the combined material compounded in the S1 into a feed inlet of a co-rotating meshed double-screw extruder, wherein the length-diameter ratio of the double-screw extruder is more than or equal to 30, the double-screw extruder gradually increases from an extruder barrel to a machine head, the extrusion molding temperature is 260-290 ℃, and the extrusion molding foaming is carried out to prepare a cross-shaped framework of the data cable core.
The beneficial effects of the invention are as follows: the invention has reasonable design and simple and convenient operation, and the polycarbonate skeleton in the prepared data cable core has the characteristics of flame retardance and high strength, improves the transmission performance of the data cable and has low production cost.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic structural view of a skeleton in the present invention.
Detailed Description
The invention will now be described in further detail with reference to the drawings and a preferred embodiment. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
A composition for producing a polycarbonate backbone in a cable, comprising the following raw materials in parts by weight:
the composition for producing polycarbonate skeleton in cable also includes nucleating agent in 0.2-1.0 weight portions.
The polycarbonate is selected from polycarbonate with medium melt viscosity, and the melt mass flow rate (300 ℃/1.2 kg), preferably (3-15) g/10min, and preferably (5-12) g/10min, is measured according to GB/T3682.1-2018 standard. Melt viscosity is generally proportional to melt strength, so low melt viscosity tends to cause breakage of foam cells, coarse appearance of skeleton and poor appearance and decrease in skeleton strength; while too high a melt viscosity results in a low extrusion efficiency, for which reason the extrusion temperature has to be increased, but this is disadvantageous for foaming. The PC can be 1300-10NP of Korean LG chemical company, FG-60 of China petrochemical industry and chemical industry Co., ltd, PC 201-15 of Korean Dow polycarbonate Co., ltd, etc.
The polyethylene terephthalate reclaimed material is added in an amount of 8.0 to 12.0 parts by weight per 100 parts by weight of PC. PET (polyethylene terephthalate) films are widely used in wire and cable factories and are used for cable core insulation, heat resistance and wrapping forming, and more PET film waste is produced in production and is usually sold as plastic waste. In order to reduce the cost of the framework material, the PET film waste can be added into a plastic crusher, crushed into small pieces, dried in a hopper at 70-90 ℃ for 4 hours and then directly added into the framework mixture material, or re-granulated and then added into the framework mixture material in the form of granules. PET and PC have complementary effects in performance, for example, PET has poor flame retardance, molten drops occur during combustion, PC has certain flame retardance, the flame retardance grade of the PC can reach UL 94V-2, the PET can self-extinguish, and the char forming rate is high; some internal stress remains after extrusion of PC, which may crack under long-term bending stress, while PET improves its flexibility.
The flame retardant is a tri (2, 4-dibromophenyl) phosphate (TDBPPE) halogenated phosphate composite flame retardant, and in every 100 parts by weight of PC, 10-20.0 parts by weight of the flame retardant, preferably 12.0-15.0 parts by weight, PX-220 of Zhejiang Wansheng science and technology Co., ltd;
or the flame retardant is brominated polymer flame retardant, and Brominated Polystyrene (BPS) flame retardant can be selected, wherein the weight part of the BPS is 3.0-12.0 parts, preferably 5.0-7.5 parts, per 100 parts of PC; BPS-301 is available from Shenyang Zhengxing materials Co.
In every 100 weight parts of PC, the addition of the anti-dripping agent is 0.3-0.6 weight parts, so that the anti-dripping agent can further improve the shell forming property of the framework during combustion, avoid the phenomenon of burning and dripping, and further improve the flame retardant property of the cable. The anti-dripping agent can be Polytetrafluoroethylene (PTFE) powder from Shanghai Lu Polymer Co., ltd., SJ-D100S anti-dripping agent from Jiashan Shen Jia technology Co., ltd., DF-S10 anti-dripping agent from Guangzhou Bao Jiujia chemical technology Co., ltd.
The skeleton foaming structure reduces the influence of the skeleton on the transmission attenuation of the cable wire, and therefore, 0.3-3.0 parts by weight of chemical foaming agent is added to 100 parts by weight of PC.
When chemical blowing agents are selected, matching with the extrusion foaming temperature should be considered. When the extrusion foaming temperature exceeds 260 ℃, the selected chemical foaming agent should release gas at a higher temperature, and too low a temperature will cause the foaming agent to be decomposed too early in the feeding section of the machine chamber, and a part of gas will leak out from the feeding port, so that the foaming degree is reduced, and the waste of the foaming agent and the uneven foaming degree are caused. When the temperature of the twin-screw extruder from the first section cylinder (feeding section) to the machine head is set to be (260-310) DEG C, namely the temperature of the later-stage machine chamber close to the feeding port is higher, adopting barium azodicarbonate and barium azodicarbonate suitable for high-temperature foaming as foaming agents; other special foaming agents sold on the market, such as the one OnCapPolyfoam chemical foaming agent of Polyone company in the United states, and the foaming agent LDM 10070S of Shanghai Jiejie chemical Co., ltd, can also be used.
When the extrusion foaming temperature of the skeletal mixture can be controlled below 260 c, for example, the temperature from the feed inlet to the extruder head is gradually increased from 230 c to 255 c, azodicarbonamide (AC) is used as the chemical blowing agent.
The addition of a nucleating agent to the skeletal composition will help to achieve uniformly sized foam cells. The residues after decomposition of the chemical blowing agent may be used as a foaming nucleating agent, but are often insufficient, for which purpose 0.2 to 1 part by weight, preferably 0.4 to 0.6 part by weight, of a nucleating agent, for example the P250 product of Bulgamann company, germany, is added per 100 parts by weight of PC. When PTFE powder is selected as the anti-drip agent, the PTFE powder acts as a nucleating agent during extrusion foaming, and therefore no additional nucleating agent may be added.
To improve extrusion efficiency, a processing lubricant is added to the backbone composition. 1 to 4 parts by weight of talcum powder or calcium stearate, and optionally calcium stearate of Shanghai Octomy chemical Co., ltd, is added to 100 parts by weight of PC. The small molecular polymer can be added into every 100 weight parts of PC, and the fatty acid ester A lubricant of Italian hair group company can be selected, so that the addition amount is low, the foaming is not affected, and the strength of the skeleton is improved.
A method for manufacturing a skeleton, which uses the composition for producing polycarbonate skeleton in cable as raw material, comprises the following steps:
s1, preparing a sample, namely adding the blend obtained by uniformly mixing the components into an injection molding machine for preparing a plastic sample, and performing injection molding according to the test spline size requirement specified in the standard to obtain the plastic sample; according to ISO 527: the tensile strength obtained by testing in 1996 standard is not less than 45MPa, the tensile modulus is not less than 1900MPa, and the high mechanical strength ensures that the framework is not easy to deform when the cable is subjected to external force and in the use process, thereby avoiding the crosstalk performance of the cable from being reduced; the oxygen index obtained by using GB/T2406-2009 standard test is not lower than 30; the flame retardant property obtained by testing according to GB/2408-2008 reaches the vertical V-0 level (the thickness of a sample is 3 mm); after the sample is detected to be qualified, the weight parts of all the components can be determined;
s2, weighing raw materials, weighing the raw materials according to the weight parts of the components determined in the S1, adding the raw materials into a high-speed mixer, and fully and uniformly stirring the raw materials to prepare a mixture, wherein the stirring time is 5-20 min, and the total weight of the mixture is more than or equal to 50kg each time; the stirring time is determined according to the amount of the added materials, namely, the more the added materials are, the longer the stirring time is;
s3, extrusion molding foaming, namely feeding the combined material compounded in the S2 into a feed inlet of a co-rotating meshed double-screw extruder, wherein the length-diameter ratio of the double-screw extruder is 35-40, the extrusion molding temperature of the double-screw extruder is gradually increased from an extruder barrel to a machine head, the extrusion molding temperature is 260-290 ℃, and the extrusion molding foaming is carried out to prepare a cross-shaped framework of a data cable core. The advantage of selecting a twin screw extruder is that the extrusion temperature can be reduced, the premature decomposition of the chemical foaming agent in the charging section of the machine chamber is prevented, and meanwhile, the plasticizing quality of the melt is maintained.
By controlling the addition ratio of the chemical foaming agent and the extrusion molding temperature, the foaming degree of the framework can be adjusted, and the higher the foaming degree is, the lower the density is. The more chemical foaming agent is added, and the proper extrusion molding temperature distribution is realized, wherein the temperature of a feeding section of a machine barrel cannot be higher than the temperature of the decomposition release gas of the chemical foaming agent, the temperature of a melting section of the plastic of the machine barrel is higher than the decomposition temperature of the chemical foaming agent, and the temperature of a machine head cannot be higher than the highest temperature of the machine barrel by more than 5 ℃, so that the foaming degree can be improved. The mass per unit length of the skeleton obtained by foaming extrusion molding is reduced by 15-30% compared with that of a non-foaming skeleton, and the transmission attenuation of a line pair at 500MHz is reduced by 2% on average.
Example 1
A composition for producing a polycarbonate skeleton in a cable core comprises the following raw materials in parts by weight:
PC:100.0 parts of FG-60 of China petrochemical industry and chemical fiber Co., ltd;
PET feed back: 8.0 parts;
flame retardant TDBPPE:12.0 parts of PX-220 of Zhejiang Wansheng science and technology Co., ltd;
anti-drip agent and nucleating agent: PTFE powder, 0.4 parts, shanghai Lu Polymer Co;
chemical foaming agent: 1.5 parts of a foaming agent of Shanghai Jie Shangjie chemical Co., ltd;
and (3) a lubricant: 0.2 parts of fatty acid ester A from Italian Hair group Co.
Example 2
A composition for producing a polycarbonate skeleton in a cable core comprises the following raw materials in parts by weight:
PC:100.0 parts of PC 201-15 of Korea Dow polycarbonate Co., ltd;
PET feed back: 10.0 parts;
BPS flame retardant: 8.0 parts of BPS-301 of Shenyang Zhengxing materials Co., ltd;
anti-drip agent: 1.0 part of DF-S10 anti-dripping agent of Guangzhou Baojie chemical engineering Co., ltd;
barium azodicarbonate chemical blowing agent: 1.5 parts;
nucleating agent: 0.5 parts of P250 from Bulgerman, germany;
and (3) a lubricant: 0.5 part of calcium stearate of Shanghai Orthodaceae chemical Co.
Comparative example 1
A composition for producing a polycarbonate skeleton in a cable core comprises the following raw materials in parts by weight:
PC:100.0 parts of PC 201-15 of Korea Dow polycarbonate Co., ltd;
PET feed back: 10.0 parts;
BPS flame retardant: 8.0 parts of BPS-301 of Shenyang Zhengxing materials Co., ltd;
anti-drip agent: 1.0 part of DF-S10 anti-dripping agent of Guangzhou Baojie chemical engineering Co., ltd;
and (3) a lubricant: 0.5 part of calcium stearate of Shanghai Orthodaceae chemical Co.
The invention is illustrated in FIG. 1 using HSYV-6 4X 2X 0.57 cable as an example. The cross-shaped polycarbonate material skeleton prepared in the example 1 or the example 2 can be used for reducing the size of the skeleton, and has the diameter D of 5.0mm and the thickness t of 0.5mm. The polycarbonate cross-shaped framework is used for producing the data cable, the maximum wire pair twisting pitch of the 4 wire pairs is controlled below 16mm, the minimum wire pair twisting pitch is controlled below 11mm, and the average twisting pitch of the 4 wire pairs is improved by 15%, in other words, the twisting production efficiency is improved by 15%; the cable polyvinyl chloride sheath is made of common flame-retardant PVC sheath materials with the combustion performance reaching the vertical V-1 level and the oxygen index not lower than 28, the thickness of the sheath is reduced from 0.75mm to 0.63mm, and the outer diameter of the cable is reduced from 7.0mm to 6.5mm. In the cable performance test, the cable had a minimum of 38.0dB of line-to-near-end crosstalk attenuation power sum (PS NEXT), a minimum of 19.3dB/100m of equal-level far-end crosstalk attenuation power sum (PS ACR-F), and an attenuation of 31.0dB/100m at a frequency of 250 MHz.
In the traditional cross-shaped framework (the material is natural-color high-density polyethylene and is of a solid structure), the diameter D of the framework is 5.3mm, and the thickness t of the framework is 0.7mm. In the cable bending test, a significant deformation of the skeleton was observed, and the distance between the 4 spaced pairs was varied. In order to meet the requirement of qualified cable crosstalk performance, the maximum wire pair twisting pitch of 4 wire pairs has to be controlled below 14mm, and the minimum wire pair twisting pitch has to be controlled below 9mm, so that the key transmission performance of the obtained cable at the frequency of 250MHz can be maintained at the following level: the sum of near-end crosstalk attenuation power (PS NEXT) of the line pair is 36.5dB, the sum of equal-level far-end crosstalk attenuation power (PS EL FEXT) is 18.0dB/100m, the attenuation is 32.1dB/100m, and the standard requirement is just met; in order to make the flame retardant level of the cable pass the vertical flame spread test of a single insulated wire and cable in the combustion test, the polyvinyl chloride (PVC) sheath of the cable must adopt a high flame retardant PVC sheath material with flame retardant property reaching the vertical V-0 level and oxygen index not lower than 38, and the thickness of the sheath is 0.75mm. The outer diameter of the resulting cable was 7.0mm.
Therefore, compared with the traditional cross-shaped skeleton cable, the cross-talk performance and the attenuation performance of the cross-shaped skeleton cable are obviously improved.
The comparative example 1 adopts a solid extrusion molding process to obtain a polycarbonate skeleton, and the skeleton size, the wire pair twisting pitch, the sheath thickness and the like are the same as those of the cables produced in the example 2 and the example 1, so that the crosstalk performance of the cables is basically unchanged, namely, the cross-talk performance of the cables is obviously improved compared with that of the traditional skeleton; but the cable attenuation is not significantly improved. This demonstrates that the chemical foaming of the skeleton not only reduces the weight of the cable and saves materials, but also improves the attenuation of the cable to some extent.
The foregoing description is merely illustrative of specific embodiments of the invention, and the invention is not limited to the details shown, since modifications and variations of the foregoing embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention.
Claims (8)
1. A composition for producing a polycarbonate backbone in a cable, characterized by: the material comprises the following raw materials in parts by weight:
100.0 parts of polycarbonate
5.0 to 20.0 parts of polyethylene terephthalate reclaimed material
3.0 to 20.0 portions of flame retardant
0.2 to 1.0 part of anti-dripping agent
0.3 to 3.0 portions of chemical foaming agent
0.2 to 4.0 parts of lubricant;
the mass flow rate of the melt of the polycarbonate is 3-15 g/10min;
the flame retardant is tris (2, 4-dibromophenyl) phosphate, and the weight part of the flame retardant is 10-20.0 parts;
or the flame retardant is a brominated polymer flame retardant, and the weight part of the brominated polymer flame retardant is 3.0-12.0 parts.
2. The composition for producing a polycarbonate backbone in a cable according to claim 1, wherein: the composition for producing the polycarbonate skeleton in the cable core further comprises a nucleating agent, wherein the weight part of the nucleating agent is 0.2-1.0 part.
3. The composition for producing a polycarbonate backbone in a cable according to claim 1, wherein: the weight portion of the polyethylene terephthalate reclaimed material is 8.0 to 12.0 portions.
4. The composition for producing a polycarbonate backbone in a cable according to claim 1, wherein: 12.0 to 15.0 parts by weight of tri (2, 4-dibromophenyl) phosphate; the brominated high polymer flame retardant is brominated polystyrene, and the weight part of the brominated high polymer flame retardant is 5.0-7.5 parts.
5. The composition for producing a polycarbonate backbone in a cable according to claim 1, wherein: the anti-dripping agent is polytetrafluoroethylene powder, SJ-D100S anti-dripping agent or DF-S10 anti-dripping agent, and the weight part of the anti-dripping agent is 0.3 to 0.6 part.
6. The composition for producing a polycarbonate backbone in a cable according to claim 1, wherein: the chemical foaming agent is a high-temperature foaming agent or a low-temperature foaming agent, and when the extrusion molding foaming temperature is more than or equal to 260 ℃, the chemical foaming agent adopts the high-temperature foaming agent; when the extrusion foaming temperature is less than 260 ℃, the chemical foaming agent adopts a low-temperature foaming agent.
7. The composition for producing a polycarbonate backbone in a cable according to claim 1, wherein: the lubricant is talcum powder or calcium stearate, and the weight part of the lubricant is 1.0-4.0 parts;
or the lubricant is a small molecular polymer, and the weight part of the lubricant is 0.2-0.5 part.
8. A method for manufacturing a skeleton, characterized by: use of a composition for producing a polycarbonate skeleton in cables according to any one of claims 1 to 7 as a starting material for producing the skeleton, comprising in particular the following steps:
s1, weighing raw materials according to the parts by weight, adding the raw materials into a high-speed mixer, fully and uniformly stirring the raw materials to prepare a mixture, wherein the stirring time is 5-20 min, and the total weight of the mixture is more than or equal to 50 and kg each time;
s2, extrusion molding foaming, namely feeding the combined material compounded in the S1 into a feed inlet of a co-rotating meshed double-screw extruder, wherein the length-diameter ratio of the double-screw extruder is more than or equal to 30, the double-screw extruder gradually increases from an extruder barrel to a machine head, the extrusion molding temperature is 260-290 ℃, and the extrusion molding foaming is carried out to prepare a cross-shaped framework of the data cable core.
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| CN202210364107.9A CN114644774B (en) | 2022-04-08 | 2022-04-08 | Composition for producing polycarbonate skeleton in cable and method for producing skeleton |
| PCT/CN2022/087622 WO2023193293A1 (en) | 2022-04-08 | 2022-04-19 | Composition for producing polycarbonate framework in cable and manufacturing method for framework |
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| CN202210364107.9A CN114644774B (en) | 2022-04-08 | 2022-04-08 | Composition for producing polycarbonate skeleton in cable and method for producing skeleton |
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| CN110325595A (en) * | 2017-02-28 | 2019-10-11 | 三井化学株式会社 | Conductive resin composition, its manufacturing method and formed body therefrom |
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|---|---|---|---|---|
| US5556903A (en) * | 1988-03-18 | 1996-09-17 | Fmc Corporation | Polybrominated phenylphosphate flame retardent for engineering thermoplastic compositions |
| JP2004182938A (en) * | 2002-12-05 | 2004-07-02 | Nippon Polyester Co Ltd | Foam and foam particle formed from polyester/polycarbonate resin composition |
| CN1773633B (en) * | 2005-11-08 | 2010-04-14 | 四川爱通电子线缆制造有限责任公司 | Electric cable foaming method |
| CN101914276B (en) * | 2010-08-12 | 2013-08-07 | 东莞市信诺橡塑工业有限公司 | Polycarbonate composition and preparation method thereof |
| CN102863771B (en) * | 2012-09-26 | 2015-01-14 | 上海锦湖日丽塑料有限公司 | Lightweight polycarbonate composition and preparation method thereof |
| CN104558913A (en) * | 2013-10-22 | 2015-04-29 | 宁夏金黄河塑业有限责任公司 | Polyethylene framework semi-air insulating layer and high-flame-retardant PVC (Polyvinyl Chloride) cable sheath |
| CN104403186B (en) * | 2014-11-14 | 2017-02-22 | 宁波一舟塑胶有限公司 | Composite synergistic flame-retardant smoke-suppression low-smoke halogen-free framework material |
| CN108061951B (en) * | 2018-01-12 | 2023-09-22 | 西安西古光通信有限公司 | Skeleton type optical fiber ribbon optical cable |
| CN113462140B (en) * | 2021-05-31 | 2022-08-09 | 武汉金发科技有限公司 | Flame-retardant polycarbonate composite material and preparation method thereof |
| CN113897045B (en) * | 2021-10-14 | 2023-05-09 | 金发科技股份有限公司 | Flame-retardant polycarbonate alloy composition and preparation method and application thereof |
-
2022
- 2022-04-08 CN CN202210364107.9A patent/CN114644774B/en active Active
- 2022-04-19 WO PCT/CN2022/087622 patent/WO2023193293A1/en unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110325595A (en) * | 2017-02-28 | 2019-10-11 | 三井化学株式会社 | Conductive resin composition, its manufacturing method and formed body therefrom |
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| WO2023193293A1 (en) | 2023-10-12 |
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