CN103128945A - Preparation method of heat-resistant PVC (polyvinyl chloride) casing pipe for buried high-voltage power cable - Google Patents
Preparation method of heat-resistant PVC (polyvinyl chloride) casing pipe for buried high-voltage power cable Download PDFInfo
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- CN103128945A CN103128945A CN201310095730XA CN201310095730A CN103128945A CN 103128945 A CN103128945 A CN 103128945A CN 201310095730X A CN201310095730X A CN 201310095730XA CN 201310095730 A CN201310095730 A CN 201310095730A CN 103128945 A CN103128945 A CN 103128945A
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Abstract
The invention discloses a preparation method of a heat-resistant PVC (polyvinyl chloride) casing pipe for a buried high-voltage power cable, which is characterized in that the casing pipe comprises the following materials in parts by mass: 100 parts of PVC, 2-3 parts of stabilizer, 4-6 parts of organic montmorillonite, 10-15 parts of nano calcium carbonate and 30-40 parts of high-temperature-resistant resin. The preparation method comprises the following steps: granulating the PVC, stabilizer, organic montmorillonite and nano calcium carbonate through twin-screw extrusion, thus obtaining a PVC nano composite material; blending the nano composite material with the high-temperature-resistant resin; and then, extruding the blend through a pipe production line, thus obtaining the pipe.
Description
Technical field
The present invention relates to a kind of preparation method of heat-resistant polyvinyl chloride tubing, more particularly, the present invention relates to the preparation method that a kind of buried high voltage power cable is used the heat-resistant polyvinyl chloride sleeve pipe.
Background technology
The CPVC power pipe is owing to having high strength, high temperature tolerance, flame retardant effect and high-insulativity and ageing-resistant, resistance to chemical attack and not being subjected to the outstanding combination properties such as corrosion of chlorine residue in water, and easy construction, duration are short, promoted by the Ministry of Construction and Electricity Department emphasis the improvement project that is used for the urban electric power cable, demand is huge.
CPVC is greatly improved than the heat resistance of PVC, the melt viscosity of CPVC raises, the poor heat stability of melt but the raising of chlorinity makes, many unfavorable factors of bringing to machine-shaping, make its processing difficulties, anti-impact is poor, application is extremely restricted, and brings difficulty to production and processing simultaneously, and then has affected the propagation and employment of CPVC tubing.
The PVC raw material sources are extensive and cheap, one of plastics that consumption is maximum in the world, in China and even all have in the world an application market widely, it is China first, second-biggest-in-the-world universal synthetic resin material, is also one of synthetic resin of industrial suitability for industrialized production the earliest simultaneously.The advantages such as polyvinyl chloride has mechanical property, electrical property is good, and acid and alkali-resistance is very competent, and chemical stability is good, and is fire-retardant and weather-proof; But heat endurance and shock resistance are relatively poor.
In all PVC plastic products, pipe part is the important consumer field of China PVC.But the product variety of China polychloroethylene pipes manufacturer is also more single, and polyvinyl chloride pipeline system rests in traditional PVC-U scope always.
The present invention is by from Polymer Structure and molecular motion thereof, the approach that improves vitrification point carries out heat resistance modified to PVC, be aided with nano-calcium carbonate and improve its toughness, and with the PVC after heat resistance modified for the preparation of buried high voltage power cable sleeve pipe, enlarged the application of polychloroethylene pipes.
Summary of the invention
The object of the invention is to the deficiency for pvc pipe wood property energy, a kind of high voltage power cable conduit material, preparation method is provided.By adding the organic montmorillonite nano intercalation to affect the motion of strand, thereby improve the PVC glass transition temperature in PVC, add simultaneously nano-calcium carbonate improve PVC toughness and improve heat resistance; Further improve heat resistance with high temperature resistant degree resin alloy again, this blend is prepared into tubing namely gets product of the present invention.Each component quality proportioning is:
Wherein stabilizing agent is complex lead salt stabilizer or calcium-zinc stabilizer.
The present invention's organo montmorillonite used can obtain with following preparation method: mixing in mass ratio commercially available sodium-based montmorillonite and water also at 5: 100, high-speed stirred forms stable suspension system, dropwise add 6% 16-octadecyl ammonium chloride solution under 80 ℃, its amount is by＞9-10mmol/g, stirring reaction 1 hour, standing demix is removed supernatant liquid, obtains white flocculent deposit, add again the water washing suction filtration for several times, drip 1%AgNO
3, until upper solution without faint yellow AgBr precipitation till.After the cotton-shaped white precipitate of gained dries by the fire 72h at a certain temperature, be ground to powder, cross 300 mesh sieves, get organo montmorillonite.
The present invention's fire resistant resin used is one or more the mixture in ABS, AS, PC.
Step of the present invention is:
(1) preparation of PVC nano composite material.PVC, stabilizing agent, organo montmorillonite, nano-calcium carbonate by double-screw extruding pelletizing, are obtained the PVC nano composite material.
(2) with PVC nano composite material and fire resistant resin blend.
(3) blend is passed through pvc pipe material production line extruding pipe material, namely get product of the present invention.
The present invention's imvite used is a kind of phyllosilicate, and its structure lamella is 1 nanometer (1nm) approximately, can be in macromolecule after organising fusion intercalation, at this moment polymer molecule exists in the structure lamella, can significantly improve the heat resistance of polymer.Again with the heat stable resin blend after, the heat resistance of material is improved more remarkable.
On the other hand, underground pipe has certain requirement with material to toughness, and elastomer or elastomeric material all can make the heat resistance of material descend, so the present invention selects the inorganic nano material (nano-calcium carbonate) of the material thermal resistance decline of not joining to improve the toughness of material.
The buried high voltage power cable conduit of the present invention preparation, simple process, with low cost, the performance that promoted the pvc pipe material have enlarged the range of application of pvc pipe material.
The specific embodiment
Embodiment one
1,100 weight portion PVC, 2 weight portion complex lead salt stabilizers, 5 weight portion organo montmorillonites, 10 weight portion nano-calcium carbonates are joined in high mixer first blend 5 minutes then low mixed 3 minutes, with mixed material extruding pelletization in conical double screw extruder, its process conditions are as follows:
Screw speed: 9-11 rev/min; Barrel zone temperature: 1 150 ± 3 ℃, district, 154 ± 3 ℃, 2nd district, 145 ± 3 ℃, 3rd district, 147 ± 3 ℃, 4th district, 162 ± 3 ℃, 5th district; Extruder temperature: 70 ± 3 ℃; Die temperature: 180 ℃.
2, with the PVC nano composite material pellet that makes and 30 weight portion ABS blend 3 minutes in the high mixer.
3, mixed blend composition is extruded into tubing with conical double screw extruder, process conditions are:
Barrel temperature: 1 170 ± 3 ℃, district, 165 ± 3 ℃, 2nd district, 155 ± 3 ℃, 3rd district, 153 ± 3 ℃, 4th district, 148 ± 3 ℃, 5th district, 162 ± 3 ℃, 6th district; Engine speed: 10rpm.
4, according to the process of tradition manufacturing pvc pipe, the pvc pipe material of extruding is carried out Vacuum shaping, code-spraying printing, traction, cutting, check, packing, puts to get buried high voltage power cable heat-resistant polyvinyl chloride sleeve pipe of the present invention in storage.
Embodiment two
Its preparation technology is identical with technique one, and its difference is that Material formula makeup is: 100 weight portion PVC, 3 weight portion calcium-zinc stabilizers, 6 weight portion organo montmorillonites, 15 weight portion nano-calcium carbonates, 40 weight portion AS.
Embodiment three
Its preparation technology is identical with technique one, and its difference is that Material formula makeup is: 100 weight portion PVC, 3 weight portion calcium-zinc stabilizers, 4 weight portion organo montmorillonites, 10 weight portion nano-calcium carbonates, 10 weight portion ABS, 20 weight portion PC.
Below for using buried high voltage power cable of the present invention with the performance test results (pressing QB/T2479-2005) of heat-resistant polyvinyl chloride sleeve pipe, its effect has been described.
| Performance | Embodiment one | Embodiment two | Embodiment three |
| Vicat softening temperature/℃ | 94.5 | 95.2 | 96.3 |
| Vertical relaxation shrinkage | 1.6％ | 1.2％ | 1.5％ |
| Falling weight impact test | By | By | By |
Claims (4)
1. a buried high voltage power cable is with the preparation method of heat-resistant polyvinyl chloride sleeve pipe, it is characterized in that: at first PVC and organo montmorillonite and nano-calcium carbonate melt blending are prepared into the PVC nano composite material, then with PVC nano composite material and high temperature resistant degree mixed with resin, then extrude by pipe production line and be prepared into tubing.
2. according to the preparation method of the described buried high voltage power cable of claim 1 with the heat-resistant polyvinyl chloride sleeve pipe, it is characterized in that, the composition of material and quality proportioning are:
3. according to the preparation method of the described buried high voltage power cable of claim 2 with the heat-resistant polyvinyl chloride sleeve pipe, it is characterized in that, described stabilizing agent is complex lead salt stabilizer or calcium-zinc stabilizer.
4. according to the preparation method of the described buried high voltage power cable of claim 2 with the heat-resistant polyvinyl chloride sleeve pipe, it is characterized in that, described heat stable resin is AS, one or more mixtures of ABS, PC.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310095730XA CN103128945A (en) | 2013-03-19 | 2013-03-19 | Preparation method of heat-resistant PVC (polyvinyl chloride) casing pipe for buried high-voltage power cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310095730XA CN103128945A (en) | 2013-03-19 | 2013-03-19 | Preparation method of heat-resistant PVC (polyvinyl chloride) casing pipe for buried high-voltage power cable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679253A (en) * | 2019-02-18 | 2019-04-26 | 南通壹选工业设计有限公司 | Water-fast PVC cable |
| CN109705498A (en) * | 2019-02-20 | 2019-05-03 | 南通壹选工业设计有限公司 | Heat-resistant antifriction PVC plastic |
| CN109836732A (en) * | 2019-02-18 | 2019-06-04 | 南通壹选工业设计有限公司 | The PVC cable material of flame-proof weather-resisting |
| CN109880255A (en) * | 2019-02-18 | 2019-06-14 | 南通壹选工业设计有限公司 | Shock proof PVC cable material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109679253A (en) * | 2019-02-18 | 2019-04-26 | 南通壹选工业设计有限公司 | Water-fast PVC cable |
| CN109836732A (en) * | 2019-02-18 | 2019-06-04 | 南通壹选工业设计有限公司 | The PVC cable material of flame-proof weather-resisting |
| CN109880255A (en) * | 2019-02-18 | 2019-06-14 | 南通壹选工业设计有限公司 | Shock proof PVC cable material |
| CN109705498A (en) * | 2019-02-20 | 2019-05-03 | 南通壹选工业设计有限公司 | Heat-resistant antifriction PVC plastic |
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Application publication date: 20130605 |