CN103524946B - A kind of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material and preparation method thereof - Google Patents

A kind of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material and preparation method thereof Download PDF

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CN103524946B
CN103524946B CN201310488196.9A CN201310488196A CN103524946B CN 103524946 B CN103524946 B CN 103524946B CN 201310488196 A CN201310488196 A CN 201310488196A CN 103524946 B CN103524946 B CN 103524946B
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polyvinyl chloride
resistant
elevated temperatures
cable material
described
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CN201310488196.9A
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CN103524946A (en
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余玲
胡建友
张煜杰
刘华
张文阳
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宁波一舟塑胶有限公司
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Abstract

The present invention relates to a kind of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, belong to new material technology field.Described CABLE MATERIALS is grouped into by the one-tenth of following weight part: polyvinyl chloride 100 parts, modification softening agent: 30-50 part, softening agent: 10-20 part, properties-correcting agent 20-40 part, fire retardant 2-10 part, inorganic filler 10-30 part, stablizer 5-15 part, processing aid: 1-5 part.The preparation method of this CABLE MATERIALS is: take each raw material by the composition of CABLE MATERIALS and parts by weight thereof; Add modification softening agent, conventional plasticizers after being mixed by polyvinyl chloride, after heated and stirred, add other raw materials again; Be fed into extruding pelletization in twin screw extruder after discharging from high mixer, after air-cooled, obtain the finished product.The good physical performance of this CABLE MATERIALS, adaptive temperature wide ranges, and pollute little, flame retardant properties is excellent, and burning fuming amount is few, and preparation method is simple, and cost is low.

Description

A kind of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material and preparation method thereof

Technical field

The present invention relates to a kind of CABLE MATERIALS and preparation method thereof, particularly relate to a kind of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material and preparation method thereof, belong to new material technology field.

Background technology

Along with developing rapidly of economy, electric wire is all widely used in industry-by-industry, field.While electric wire consumption constantly increases, the accident of electrical fire also increases thereupon, and the security of electric wire product, the feature of environmental protection, work-ing life there has also been higher requirement, and the fire-retardant problem of electric wire causes the attention of countries in the world gradually.As far back as the seventies, in succession develop flame retardant cable both at home and abroad, though these flame retardant cables have certain flame retardant effect, also there is many defects, as resistance to elevated temperatures is strong, can not at high temperature operation; Ageing resistance is inadequate, and work-ing life is short, pole fire hazardous; When fire occurs, the electric wire of burning can produce toxic gas and smog, and this not only can affect disaster relief work, also can cause lives and properties " second time disaster ".In view of many industrial sectors and the requirement of the municipal civilian installation such as subway, Highrise buildings to the safety and reliability of cable more and more higher, the heat-resistant fireproof cable of an urgent demand Development of New Generation.

The document about heat-resistant fireproof cable and preparation method thereof is had to have Chinese patent application (publication number: CN103059480A) in prior art, it discloses a kind of resistant to elevated temperatures polyvinyl chloride cable material, the weight part of its constitutive material is: polyvinyl chloride (PVC) RESINS 70-130 part; Softening agent 20-40 part; Mineral filler 70-90 part; Linking agent 4-5 part; Crosslinking coagent 0.5-1 part; Oxidation inhibitor 0.8-1.4 part; Lubricant 0.8 part.But the tensile strength of this cable is only 13.4MPa, elongation at break is only 240%, after overaging (136 DEG C × 168h), tensile strength retention rate is about 75%, reserved elongation at break is about 75%, the mechanical property of this cable visible is lower, and the ability of heat resistant is also lower, and the temperature range of adaptation is narrow.

Summary of the invention

The object of the invention is to the defect for existing in prior art, a kind of good physical performance is provided, adaptive temperature wide ranges, resistant to elevated temperatures thermoplastic polyvinyl chloride cable material.

Above-mentioned purpose of the present invention implements by the following technical programs: a kind of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, and this CABLE MATERIALS is grouped into by the one-tenth of following weight part:

Wherein, described polyvinyl chloride is polychloroethylene with high polymerization degree, polymerization degree 2000-2500, and described modification softening agent is trimellitic acid ester plasticizer.

The present invention is by adopting trimellitic acid ester plasticizer to be modification softening agent and the composite use of other softening agent, again in conjunction with the properties-correcting agent of particular types and massfraction thereof, make the compatibility of thermoplastic polyvinyl chloride cable material more reasonable, thus the physicals of thermoplastic polyvinyl chloride cable material common cable material more of the prior art is improved significantly, thermoplastic polyvinyl chloride cable material can be worked for a long time under 125 DEG C of high temperature.

The trimellitic acid ester plasticizer that the present invention adopts is the softening agent that a class performance is very excellent, have the advantage of monomer-plasticizer and Reoplex concurrently, its volatility is low, transport property is little, resistance to extraction and weather resistance are similar to polyester plasticizer, and consistency and low temperature properties are similar to phthalic ester.The present invention adopts trimellitic acid class softening agent be modification softening agent and used by proportioning with other softening agent, again with properties-correcting agent acting in conjunction, effectively improve the electrical insulating property of polyvinyl chloride, volatility, flexibility, elasticity, solvent resistance, wet fastness, high thermal resistance and low temperature resistant flexibility.And when production, processing cable material, make its drawing and forming easy, reduce rework rate.In addition, other softening agent of trimellitic acid ester plasticizer cost ratio are cheap, can reduce production cost, improve the market competitiveness of cable material of the present invention, are applicable to large-scale industrial production.

In CABLE MATERIALS of the present invention, polyvinyl chloride is the polychloroethylene with high polymerization degree of the polymerization degree at 2000-2500.Polyvinyl chloride is with the increase of the polymerization degree, and its apparent density reduces gradually, and absorbed dose, the ageing whiteness of softening agent improve gradually.As everyone knows, the polymerization degree is polymerization temperature function, and the polymerization degree is higher, and polyvinyl chloride performance is better, and as molecular chain increases, side chain is few, and stability is good, and particle is loose.Again because when fill a prescription, batch mixing identical with plasticizing process condition, the size of the polymerization degree of polyvinyl chloride has conclusive impact to material plasticizing performance.Under the condition that formula is identical with plasticizing process, with the continuous increase of polyvinyl chloride polymerization degree, the fusion time of material extends gradually, and balancing torque increases gradually, and fusion factor is more and more less, and the processing characteristics of material worse and worse.Therefore, it is the matrix resin of CABLE MATERIALS that the present invention selects the polymerization degree to be the polychloroethylene with high polymerization degree of 2000-2500, improves the thermotolerance of CABLE MATERIALS of the present invention and the effect of mechanical property to reach, and ensures that the hardness of CABLE MATERIALS is little by the impact of temperature simultaneously.

In above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, described trimellitic acid ester plasticizer is one or more in tridecyl alcohol trimellitate, triallyltrimelitate, trioctyl trimellitate, tri trimellitate (just pungent positive the last of the ten Heavenly stems ester).Described trimellitic acid ester plasticizer also can select the partially stupid three sour lipid softening agent of Japanese DIG special type.

In above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, described softening agent is polyester softening agent, and described polyester softening agent is one or more in sebacic acid-1,2-PD ester, sebacic acid-1,3 butylene glycol ester.The polyester plasticizer that the present invention selects has higher thermotolerance, ageing resistance, and its volatility resistance is better than other softening agent such as bis(pentaerythritolester)s.The present invention selects such polyester plasticizer to coordinate trimellitic acid ester plasticizer co-formulation polyvinyl chloride cable material, CABLE MATERIALS of the present invention is made to have good physicals compared with CABLE MATERIALS common in prior art, especially good resistance to elevated temperatures, can under 125 DEG C of hot conditionss life-time service.

Further preferably, described polyester plasticizer is sebacic acid-1,2-PD ester or sebacic acid-1,3 butylene glycol ester.Sebacic acid-1,2-PD ester has good high temperature resistant, resistance to migration, and UV resistant such as to be exposed to the sun at the advantage, with trimellitic acid ester plasticizer with the use of, can greatly improve its plasticization effect and resistance to elevated temperatures.Sebacic acid-1,3 butylene glycol ester also has resistance to migration, resistance to volatilization, the advantages such as electrical property is excellent, acts under being in hot and humid poor environment such as grade for a long time with the composite obtained CABLE MATERIALS of trimellitic acid ester plasticizer.Draw through lot of experiments, polyester plasticizer sebacic acid-1,2-PD ester and sebacic acid-1,3 butylene glycol ester by a certain percentage with the use of, greatly can improve aging resistance and the mechanical property of CABLE MATERIALS, both weight ratios can be 5:(4-6).

In above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, described properties-correcting agent is one or more in crosslinked polystyrene rubber, crosslinked butyl rubber, crosslinked chloroprene rubber and crosslinked fluororubber.Rubber only has just can manifest elasticity by crosslinked, and the crosslinking reaction of rubber is the process that rubber transforms from linear structure to reticulated structure, and namely the linear macromolecule of rubber connects into the change procedure of tridimensional network by chemical process or physical method.Wherein connecting into covalent linkage tridimensional network by chemical process, there is cross-linking set in its permanent local.The cross-linking set of polystyrene rubber is vitrifying, crystalline domains and hydrogen bond, add monomer sulphur and thiurams (TMTD) or morpholine class (DTDM) organosulfur carrier and carry out vulcanization crosslinking, its principle is carried out parallel sulfuration obtained reticulated structure compound by [two (3-triethoxy propyl group silicomethane)] tetrasulfide coupling agent.Isoprene-isobutylene rubber is then cross-linked with resol, and its principle is the α-H captured in molecule, molecular scission thus add and be shaped as the longer molecular structure of molecular chain.Chloroprene rubber is then by metal oxide cross-linked, and as ZnO and MgO, its principle is the Cl atom that ZnO and MgO replaces in molecule, thus carries out addition reaction formation macromolecular chain compound.Viton is a kind of saturated rubber, is to be cross-linked by Diamines vulcanizing agent.Rubber after crosslinked, its tensile strength, resistance to fatigue, thermostability and oxidative stability are all significantly improved.The present invention proves by experiment, above-mentioned cross-linked rubber is adopted to coordinate trimellitic acid ester plasticizer, polyester plasticizer, and with polychloroethylene with high polymerization degree with the use of, its mechanical property and ageing-resistant performance are improved greatly, and aging after also by low temperature flexing test.

In above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, described fire retardant is one or more in antimonous oxide, TDE, zinc borate, aluminium hydroxide, magnesium hydroxide.When antimonous oxide and TDE is composite adds in PVC cable material, good synergy can be produced, improve the flame retardant effect of CABLE MATERIALS significantly.And the Heat stability is good of zinc borate, toxicity is low, at high temperature can decompose production boron trioxide etc. and contain boron substance, and this material covers polymer surfaces can form one deck glassy mass, can play the effect suppressing twilight sunset, condensed phase fire-retardant.Decompose the zn cpds produced not only can improve neat coal amout, be lowered into smoke which, burning also can be stoped to proceed.Therefore flame retardant resistance and the smoke-suppressing of CABLE MATERIALS can be significantly improved after adding zinc borate in PVC cable material, more obvious with halogenated flame retardant, the composite result of use of antimonous oxide.And when aluminium hydroxide, magnesium hydroxide decomposes, do not produce toxic gas, also corrosive combustion products is not produced, only discharge crystal water, and be a strong endothermic reaction, recept the caloric very large, the surface temperature of synthetic materials in flame of filling can be reduced, there is the effect suppressing polymer unwinds and cool produced inflammable gas.The water vapour that reaction produces can dilute inflammable gas, suppresses spreading of burning, the refractory metal oxides (Al of synkaingenesis 2o 3, MgO) there is higher activity, its can the hot oxygen crosslinking reaction of catalytic polymer, forms one deck charing film at polymer surfaces, heat transfer when charing film can weaken burning, mass transfer effect, thus play fire-retardant effect, improve the fire resistance of CABLE MATERIALS further.In addition, this type oxide can also adsorb soot dust granule, plays and presses down cigarette effect.

Further preferably, described fire retardant is one or more in antimonous oxide, TDE, zinc borate.Other fire retardants such as relative aluminium hydroxide, magnesium hydroxide, the synergy that antimonous oxide, TDE, zinc borate produce in thermoplastic polyvinyl chloride cable material of the present invention and other compositions is better.

In above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, described inorganic filler is one or more in nano-calcium carbonate, kaolin, talcum powder.Nano-calcium carbonate cheap and easy to get, kaolin are joined polyvinyl chloride cable material and not only can reduce production cost, also can improve insulativity, snappiness, tensile strength, the shock strength of CABLE MATERIALS, improve the rheological of CABLE MATERIALS, improve the plasticity of CABLE MATERIALS.Talcous hardness is little, fusing point is high, expand and convergent force low, dispersiveness high, strong covering power, oil suction and hydrophobicity good, satiny degree is large, coefficient of friction is little, has again unique dry slip, good insulativity is all had to electricity and heat, and stable chemical nature, have ability that is antiacid, alkali erosion, therefore talcum powder is the weighting agent of thermoplastic polyvinyl chloride cable material excellence.

In above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, described stablizer is calcium zinc stabilizer.Calcium zinc stabilizer by calcium salt, zinc salt, lubricant, oxidation inhibitor etc. for main ingredient adopts special recombining process and synthesizing, not only can replace the poisonous stablizers such as plumbous cadmium salt class and organic tin, also there is goodish thermostability, light stability and the transparency and tinting strength.In thermoplastic polyvinyl chloride cable material of the present invention, add calcium zinc stabilizer, the processing characteristics of CABLE MATERIALS and heat-resisting cold tolerance can be improved.

In above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, described processing aid is one or more in polyethylene wax, stearic acid, pentaerythritol ester, white carbon black, Hinered phenols antioxidant.Polyethylene wax has good oilness, and adding in polyvinyl chloride cable material can the diffusion of reinforcing filler.Stearic acid has good oilness and light, thermostability.Pentaerythritol ester has good insulativity, high thermal resistance.White carbon black is high temperature resistant, do not fire, tasteless, odorless, there is good electrical insulating property, be the packing strengthening agent of environmental protection good in polyvinyl chloride cable material.Easily there is thermal-oxidative degradation reaction in polyvinyl chloride, adds the antioxidant property that Hinered phenols antioxidant can promote CABLE MATERIALS of the present invention, and extend its work-ing life.

Another object of the present invention is the preparation method providing a kind of above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, and this preparation method comprises the following steps:

S1, take various raw material according to the composition of above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material and parts by weight thereof;

S2, pour the polyvinyl chloride taken into high-speed mixer and mixing, the modification softening agent, the conventional plasticizers that take is added after mixing, after heated and stirred to modification softening agent, conventional plasticizers is absorbed completely by polyvinyl chloride, add the properties-correcting agent, fire retardant, inorganic filler, stablizer and the processing aid that take again, be stirred to raw material completely even;

S3, the raw material stirred in step S2 to be discharged from high mixer, pour in feeding machine, be fed in twin screw extruder by feeding machine, extruding pelletization, obtained resistant to elevated temperatures thermoplastic polyvinyl chloride cable material after air-cooled.

In the preparation method of above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, the temperature of heated and stirred described in step S2 is 90-110 DEG C.

In the preparation method of above-mentioned resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, as preferably, the feeding frequency of the feeding machine described in step S3 is 20-30Hz, and the temperature of described twin screw extruder is set as 170-190 DEG C, and the engine speed of twin screw extruder is 2900-3000r/min.

The present invention has the following advantages:

1, the good physical performance of the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material of the present invention, there is the stress crack resistance performance of good intensity, wear resistance, mobility, processing characteristics, flame retardant properties and material, tensile strength can reach 23.8Mpa, elongation at break can reach 332%, tensile strength retention rate at high temperature after life-time service can reach 93%, and reserved elongation at break can reach 95%.

2, the adaptive temperature wide ranges of the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material of the present invention, heat aging performance is excellent, and the temperature resistant grade of CABLE MATERIALS is high, by the high temperature resistant test of 150 DEG C, all not ftractureing by-40 DEG C of low temperature windings in aging front and back, can work under 125 DEG C of high temperature for a long time.

3, the preparation method of the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material of the present invention is simple, and cost is low, and line wall is thin, and extruded velocity is fast, and technical process is short, and productivity effect is high, and environmental protection, be applicable to large-scale industrial production.

Embodiment

Be below specific embodiments of the invention, technical scheme of the present invention is further described, but the present invention is not limited to these embodiments.

Table 1: each composition of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material and parts by weight (parts by weight) thereof in embodiments of the invention

Embodiment 1:

Various raw material is taken according to the composition of the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material described in embodiment in table 11 and parts by weight thereof;

Pour the above-mentioned polyvinyl chloride taken into high-speed mixer and mixing, the modification softening agent, the conventional plasticizers that take is added after mixing, modification softening agent is stirred to, after conventional plasticizers absorbed completely by polyvinyl chloride when being heated to 100 DEG C, add the properties-correcting agent, fire retardant, inorganic filler, stablizer and the processing aid that take again, be stirred to raw material completely even;

The above-mentioned raw material stirred is discharged from high mixer, pour in feeding machine, extruding pelletization in twin screw extruder is fed into by feeding machine, the feeding frequency of feeding machine is 25Hz, twin screw extruder temperature is set in 180 DEG C, engine speed is 3000r/min, the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material of obtained the present embodiment after air-cooled.

Embodiment 2:

Various raw material is taken according to the composition of the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material described in embodiment in table 12 and parts by weight thereof;

Pour the above-mentioned polyvinyl chloride taken into high-speed mixer and mixing, the modification softening agent, the conventional plasticizers that take is added after mixing, modification softening agent is stirred to, after conventional plasticizers absorbed completely by polyvinyl chloride when being heated to 90 DEG C, add the properties-correcting agent, fire retardant, inorganic filler, stablizer and the processing aid that take again, be stirred to raw material completely even;

The above-mentioned raw material stirred is discharged from high mixer, pour in feeding machine, extruding pelletization in twin screw extruder is fed into by feeding machine, the feeding frequency of feeding machine is 20Hz, twin screw extruder temperature is set in 170 DEG C, engine speed is 2900r/min, the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material of obtained the present embodiment after air-cooled.

Embodiment 3:

Various raw material is taken according to the composition of the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material described in embodiment in table 13 and parts by weight thereof;

Pour the above-mentioned polyvinyl chloride taken into high-speed mixer and mixing, the modification softening agent, the conventional plasticizers that take is added after mixing, modification softening agent is stirred to, after conventional plasticizers absorbed completely by polyvinyl chloride when being heated to 110 DEG C, add the properties-correcting agent, fire retardant, inorganic filler, stablizer and the processing aid that take again, be stirred to raw material completely even;

The above-mentioned raw material stirred is discharged from high mixer, pour in feeding machine, extruding pelletization in twin screw extruder is fed into by feeding machine, the feeding frequency of feeding machine is 30Hz, twin screw extruder temperature is set in 190 DEG C, engine speed is 3100r/min, the resistant to elevated temperatures thermoplastic polyvinyl chloride cable material of obtained the present embodiment after air-cooled.

Comparative example

A kind of resistant to elevated temperatures polyvinyl chloride cable material is disclosed in Chinese patent application file (publication number: CN103059480A), it is made up of the raw material of following weight fraction: the polyvinyl chloride of chlorination: 70 parts, trioctyl trimellitate: 21 parts, calcium carbonate: 30 parts, potter's clay: 40 parts, triallyl cyanurate: 4 parts, peroxidized t-butyl perbenzoate: 0.9 part, 2,4 di-tert-butyl-phenyls-tris phosphite: 1.4 parts, calcium stearate: 0.4 part, Zinic stearas: 0.4 part.After above-mentioned component is weighed successively, add in high-speed mixer and mix, be transferred to after mixing on twin screw plasticator and plasticate, wait pelletizing after water cooling bracing again evenly of plasticating, enter centrifugal drier drying, carry out packing to obtain resistant to elevated temperatures polyvinyl chloride cable material.

Resistant to elevated temperatures polyvinyl chloride cable material sample in embodiment of the present invention 1-3 and comparative example is carried out performance test, and test result is as shown in table 2.

The physicals of resistant to elevated temperatures polyvinyl chloride cable material in table 2: embodiment of the present invention 1-3 and comparative example

As can be seen from Table 2: the good physical performance of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material of the present invention, greatly exceed the mean level (ML) of common cable material, there is higher intensity, good wear resistance, processibility, flame retardant resistance, its ageing-resistant performance is excellent, can be difficult to by common cable the 150 DEG C × 240h thermal ageing test that passes through smoothly, can work under 125 DEG C of high temperature for a long time.Resistant to elevated temperatures thermoplastic polyvinyl chloride cable material in embodiment 1-3 is pulled into the insulated cable that external diameter is 2.0mm, invent aging front and back all not ftracture by-40 DEG C of low temperature windings, this is that common cable can not reach, and cable certainly puts out in combustion testing, wear test is also better than standard-required greatly.

Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.

Although made a detailed description the present invention and quoted some specific embodiments as proof, to those skilled in the art, only otherwise it is obvious for leaving that the spirit and scope of the present invention can make various changes or revise.

Claims (8)

1. a resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, is characterized in that, this CABLE MATERIALS is grouped into by the one-tenth of following weight part:
Wherein, described polyvinyl chloride is polychloroethylene with high polymerization degree, and the polymerization degree is 2000-2500, and described modification softening agent is trimellitic acid ester plasticizer; Described softening agent is one or more in sebacic acid-1,2-PD ester, sebacic acid-1,3 butylene glycol ester; Described properties-correcting agent is one or more in crosslinked polystyrene rubber, crosslinked butyl rubber, crosslinked chloroprene rubber and crosslinked fluororubber.
2. resistant to elevated temperatures thermoplastic polyvinyl chloride cable material according to claim 1, it is characterized in that, described trimellitic acid ester plasticizer is one or more in tridecyl alcohol trimellitate, triallyltrimelitate, trioctyl trimellitate, tri trimellitate (just pungent positive the last of the ten Heavenly stems ester).
3. resistant to elevated temperatures thermoplastic polyvinyl chloride cable material according to claim 1, is characterized in that, described fire retardant is one or more in antimonous oxide, TDE, zinc borate, aluminium hydroxide, magnesium hydroxide.
4. resistant to elevated temperatures thermoplastic polyvinyl chloride cable material according to claim 1, is characterized in that, described inorganic filler is one or more in nano-calcium carbonate, kaolin, talcum powder.
5. resistant to elevated temperatures thermoplastic polyvinyl chloride cable material according to claim 1, is characterized in that, described stablizer is calcium zinc stabilizer.
6. resistant to elevated temperatures thermoplastic polyvinyl chloride cable material according to claim 1, is characterized in that, described processing aid is one or more in polyethylene wax, stearic acid, pentaerythritol ester, white carbon black, Hinered phenols antioxidant.
7. a preparation method for resistant to elevated temperatures thermoplastic polyvinyl chloride cable material, is characterized in that, this preparation method comprises the steps:
S1, take each raw material according to the composition of thermoplastic polyvinyl chloride cable material resistant to elevated temperatures described in claim 1 and parts by weight thereof;
S2, pour the polyvinyl chloride taken into high-speed mixer and mixing, the modification softening agent, the softening agent that take is added after mixing, after heated and stirred to modification softening agent, softening agent is absorbed completely by polyvinyl chloride, add the properties-correcting agent, fire retardant, inorganic filler, stablizer and the processing aid that take again, be stirred to raw material completely even;
S3, the raw material stirred in step S2 to be discharged from high mixer, pour in feeding machine, be fed in twin screw extruder by feeding machine, extruding pelletization, obtained resistant to elevated temperatures thermoplastic polyvinyl chloride cable material after air-cooled.
8. the preparation method of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material according to claim 7, it is characterized in that, the temperature of heated and stirred described in step S2 is 90-110 DEG C, the feeding frequency of the feeding machine described in step S3 is 20-30Hz, the temperature of described twin screw extruder is set as 170-190 DEG C, and the engine speed of twin screw extruder is 2900-3000r/min.
CN201310488196.9A 2013-10-17 2013-10-17 A kind of resistant to elevated temperatures thermoplastic polyvinyl chloride cable material and preparation method thereof CN103524946B (en)

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