CN1141718C - Liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator - Google Patents
Liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator Download PDFInfo
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- CN1141718C CN1141718C CNB001056352A CN00105635A CN1141718C CN 1141718 C CN1141718 C CN 1141718C CN B001056352 A CNB001056352 A CN B001056352A CN 00105635 A CN00105635 A CN 00105635A CN 1141718 C CN1141718 C CN 1141718C
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- liquid polyester
- polyester modified
- modified dose
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- epoxy resin
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Abstract
The present invention belongs to the technical field of manufacturing fiber reinforced plastics. Epoxy resin is adopted as a basic material, E glass fiber of unidirectional untwisted straight yarn or double yarn is used as a reinforcing material, and a liquid polyester modifier is added to the epoxy resin basic material at the same time. The liquid polyester modifier is prepared from binary acid, dibasic alcohol and oligomer diol through co condensation polymerization, and the molecular weight of the liquid polyester modifier is from 3000 to 30000. The present invention has original excellent electrical and mechanical properties and also has stress corrosion resistance, and thus, a core rod with excellent comprehensive properties of electrical properties and stress corrosion resistance for a composite insulator is obtained.
Description
Technical field the invention belongs to fibre reinforced plastics manufacturing technology field, is particularly related to High-Voltage Insulation made technology.
The background technology composite insulator dodges advantages such as performance is good, specific strength is high, no null value, operation maintenance convenience because of its resistant, obtained in China electric power system high voltage external insulation field in recent ten years using widely.Its basic structure is the composite construction of fiber reinforced plastics rod suit organic material umbrella cover, and two ends are the metal gold utensil.Wherein fiber reinforced plastics rod is as the carrier of interior insulating part and mechanical load, and its electric and mechanical performance are directly connected to the operational reliability of composite insulator.The fiber reinforced plastics rod that is used for high-voltage composite insulator generally by one-way glass fiber impregnation epoxy resin-base after continuously the manufacturing of pultrusion (or cite approvingly and pull out) technology form.
By consisting of of the expoxy glass steel core bar of pultrude process manufacturing: glass fibre weight accounts for 2/3～4/5, and all the other 1/5～1/3 are epoxy resin-base, and for the horizontal extruding equipment that generally uses, the shared scope of glass fibre weight is narrower, is 3/4～4/5.The epoxy resin-base prescription is the mixture by a kind of epoxy resin or several epoxy resin, adds necessary curing agent, promoter, inner pattern releasing agent applicable in proportion, also adds other auxiliary agent such as defoamer, diluent, interface inorganic agent, colouring agent etc. sometimes.
Through material and technologic updating for over ten years, this glass-reinforced plastic material has had electric property preferably.But in actual motion, that insulator is in is electric, under machinery and the chemical comprehensive function, after operation after a while, brittle fracture (abbreviation brittle failure) accident of core rod of insulator occurred on some circuits.Because core brittle fracture may cause the electric power system serious accident that goes offline such, therefore just the overall targets electric and mechanical two aspects of plug are had higher requirement.At present successfully carried out the simulation of core brittle fracture with stress corrosion (cracking) test in the laboratory, also there has been the corresponding standard draft in International Electrotechnical Commission (IEC) about the anticorrosion stress-resistant performance of core rod used in composite insulator.
At present the main body of composite electric insulator core bar material be based on the E glass fibre the epoxy glass laminate plug.E glass-epoxy plug electric property excellence, mechanical strength is also fine, but the anticorrosion stress-resistant poor-performing, and dispersed big, wayward.The plug that Germany Hirst Societe Des Ceramiques Techniques (Hoechst CeramTec) replaces the E glass fibre to make with a kind of ECR fiber, its anticorrosion stress-resistant function admirable, but its electric property is undesirable.
Summary of the invention the objective of the invention is for overcoming the weak point of prior art, the liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator of a kind of usefulness is proposed, in the manufacture process of E glass-epoxy plug, add liquid polyester modified dose, make it keep original excellent electric, mechanical performance, and have the anticorrosion stress-resistant performance concurrently, to obtain the composite electric insulator core bar of a kind of electric property and anticorrosion stress-resistant performance synthesis excellent performance.
The present invention proposes the liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator of a kind of usefulness.This plug adopts epoxy resin-base, and with the E glass fibre of unidirectional, non-twist direct yarn or folded yarn as reinforcing material.Simultaneously in epoxy resin-base, also added a kind of liquid polyester modified dose.This liquid polyester modified dose is polymerized by binary acid, dihydroxylic alcohols and oligomer diol cocondensation, and its number-average molecular weight is 3,000～30,000.
The percentage by weight of this each component of liquid polyester modified dose is: said binary acid has two kinds: adipic acid 3～40%; Certain herbaceous plants with big flowers diacid 1～35%.Said dihydroxylic alcohols has two kinds: diglycol 1～30%; 2-methyl 1, ammediol 1～20%.Said oligomer diol has three kinds: polyoxypropyleneglycol, number-average molecular weight are 500～4,000, the every gram material of 25～120 milligrams of potassium hydroxide of hydroxyl value, consumption 1～55%; PolyTHF-propylene oxide copolymerization glycol, number-average molecular weight 500～2,000, the every gram material of 50～100 milligrams of potassium hydroxide of hydroxyl value, consumption 0～40%; Terminal hydroxy group gathers hexylene glycol/hexamethylene-diisocyanate, is called for short polyurethane diol, and number-average molecular weight is 2,000～3,000, the every gram material of 20～30 milligrams of potassium hydroxide of hydroxyl value, consumption 0～30%.Total rate of charge can be hydroxyl/carboxyl=1.1～1.15/1.
Said liquid polyester modified dose, its consumption is 3～40% of a weight epoxy.In liquid polyester modified dose, polyoxypropyleneglycol and PolyTHF-propylene oxide copolymerization glycol, promptly the percentage by weight of the consumption of PTMEG preferably be higher than in liquid polyester modified dose 20%.
The present invention is based on existing E glass fibre expoxy glass steel core bar, adds liquid polyester modified dose in addition in the epoxy resin-base prescription, is that the basis is made with the existing production technology of making E glass fibre expoxy glass steel core bar.Liquid polyester modified dose effect is solidification internal stress and the interface stress that improves decay resistance, reduces fiber reinforced plastics rod, to improve the anticorrosion stress-resistant performance of fiber reinforced plastics rod.Therefore the fiber reinforced plastics rod that adopts the present invention to make has kept excellent electric, the mechanical performance of existing E glass fibre expoxy glass steel core bar fully.And obviously given its anticorrosion stress-resistant performance, under the product of 50 millimeters all sizes of 10 millimeters～φ of diameter phi has all reached and has acted in 300 MPa mechanical stresses and 1 equivalent salpeter solution, the brittle failure time was brought up to more than 100 hours from original several hours to tens hours, and dispersiveness greatly reduces.
Description of drawings
Fig. 1 is the pultrude process schematic diagram of existing manufacturing E glass fibre expoxy glass steel core bar.
Embodiment
Embodiment:
Plug with 18 millimeters of manufacturing diameter phi is an example, presses the raw material ratio synthetic fluid polyester modification agent in the table 1.According to as shown in Figure 1 existing pultrude process, the proportioning of pressing reinforcing material, epoxy resin component and liquid polyester modified dose of three kinds of stocks in the table 2 draws plug then.
Table 1
| Liquid polyester modified dose | Binary acid | Dihydroxylic alcohols | Oligomer diol | ||||
| Adipic acid (gram) | Decanedioic acid (gram) | Diglycol (gram) | 2- | Polyoxypropyleneglycol (gram) | PolyTHF-propylene oxide copolymerization glycol (gram) | Polyurethane diol (gram) | |
| Modifier 1 | ?37.0 | ?3.0 | ?26.0 | ?1.0 | ?33.0 | ||
| Modifier 2 | ?4.0 | ?35.0 | ?2.0 | ?13.8 | ?7.0 | ?38.2 | |
| Modifier 3 | ?21.0 | ?1.0 | ?9.0 | ?1.5 | ?50.0 | ?9.5 | ?8.0 |
| Modifier 4 | ?16.0 | ?18.0 | ?11.0 | ?7.0 | ?27.0 | ?21.0 | |
Table 2
| Form | Composition | The trade mark | Proportioning | |
| Reinforcing material | The E glass fibre | RS480-R50 (folded yarn) | 780 parts | |
| The epoxy resin component | Epoxy resin | E51 | 100 parts | |
| Curing agent | JHY906 | 80 parts | ||
| Promoter | DMP-30 | 3.5 part | ||
| Inner pattern releasing agent | PS125 | 2 parts | ||
| The interface inorganic agent | 30%KH570 and 30%KH580 40%TTLPI- | 3 parts | ||
| Liquid polyester modified | Modifier | 1 | Form and see Table 1 | 40 parts |
| Modifier 2 | 27 parts | |||
| Modifier 3 | 4 parts | |||
| Modifier 4 | 15 parts |
Liquid polyester modified dose synthetic: by the proportioning of table 1 raw material are packed in the reactor, begin when being warming up to 80 ℃ to stir.When continuing to be warming up to 140 ℃, begin nitrogen is passed in the reactor.Simultaneously, begin control and heat up, require in 1 hour, material to be warmed up to 160 ℃ from 140 ℃.Be incubated 2～3 hours down at 160 ℃, collect the reaction water that generates.Then temperature was raised to 210 ℃ in 3 hours, insulation reaction 4～6 hours.Survey acid number,, promptly cool to 150 ℃, vacuumize and remove volatile matter and get final product when acid number during less than 1 milligram of potassium hydroxide/gram.
Use 4 kinds liquid polyester modified dose that listed raw material ratio synthesizes in the table 1 respectively, by the consumption drawing plug of table 2 requirement.
The pulling process of plug is as follows: draw yarn bundle 2 from yarn cake 1, totally 90, through guide plate 3 and dividing sinker plate 4, pass diameter and be reduced to plastic squeeze ring 5,6,7,8 and the mould 9 of 18.2 millimeters of φ from 22 millimeters of φ, to draw-gear 10.Length is that three district's temperature of 1.2 meters mould 9 are set at 130 ℃, 185 ℃ and 180 ℃ respectively from arrival end.
Press table 1 proportioning with epoxy resin E51, methyl tetrahydrochysene phthalate anhydride JHY906, it is standby that inner pattern releasing agent applicable, interface inorganic agent and liquid polyester modified dose mix the back.After treating that mold temperature reaches set point, adding DMP-30 stirs and is mixed with resin adhesive liquid 11, and the resin adhesive liquid of each preparation 11 service times should be above 6 hours.Pour the resin adhesive liquid 11 that preparation is finished into glue groove 12, yarn bundle 2 is pressed into glue groove 12 can starts draw-gear 10.
For making each component, particularly liquid polyester modified dose is fully mixed with the epoxy resin component, 13 pairs of resin adhesive liquid of swinging agitator 11 is housed on glue groove 12 carries out continuous stirring.After the resin adhesive liquid 11, pass through dividing sinker plate 4 through draw-gear 10 with the hauling speed of 10 centimetres of per minutes on yarn bundle 2 soaks in glue groove 12, plastic squeeze ring 5,6,7,8 squeezes and removes unnecessary glue.Behind the mould 9 of uncured resin fibre body 14 through heating, be solidified into plug 15, drew draw-gear 10 after, cut into needed length by cast-cutting saw 16.
Claims (2)
1. one kind with liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator, adopt epoxy resin-base, and with the E glass fibre of unidirectional, non-twist direct yarn or folded yarn as reinforcing material, it is characterized in that, simultaneously also added a kind of liquid polyester modified dose in epoxy resin-base, this liquid polyester modified dose is polymerized by binary acid, dihydroxylic alcohols and oligomer diol cocondensation, and its number-average molecular weight is 3,000～30,000;
The percentage by weight of this each component of liquid polyester modified dose is: two kinds of binary acid: adipic acid 3～40%, certain herbaceous plants with big flowers diacid 1～35%; Two kinds of dihydroxylic alcohols: diglycol 1～30%, 2-methyl 1, ammediol 1～20%; Three kinds of oligomer diols: polyoxypropyleneglycol, number-average molecular weight is 500～4,000, the every gram material of 25～120 milligrams of potassium hydroxide of hydroxyl value, consumption 1～55%, PolyTHF-propylene oxide copolymerization glycol, number-average molecular weight 500～2,000, the every gram material of 50～100 milligrams of potassium hydroxide of hydroxyl value, consumption 0～40%, terminal hydroxy group gathers hexylene glycol/hexamethylene-diisocyanate, number-average molecular weight is 2,000～3,000, the every gram material of 20～30 milligrams of potassium hydroxide of hydroxyl value, consumption 0～30%, total rate of charge is hydroxyl/carboxyl=1.1～1.15/1;
Said liquid polyester modified dose, its consumption is 3～40% of a weight epoxy.
2. anticorrosion stress-resistant core rod for high-voltage composite insulator according to claim 1, it is characterized in that, said liquid polyester modified dose in raw material is formed, the percentage by weight of its polyoxypropyleneglycol and PolyTHF-propylene oxide copolymerization glycol consumption should be higher than in liquid polyester modified dose 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001056352A CN1141718C (en) | 2000-04-14 | 2000-04-14 | Liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001056352A CN1141718C (en) | 2000-04-14 | 2000-04-14 | Liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator |
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| Publication Number | Publication Date |
|---|---|
| CN1267063A CN1267063A (en) | 2000-09-20 |
| CN1141718C true CN1141718C (en) | 2004-03-10 |
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| CNB001056352A Expired - Fee Related CN1141718C (en) | 2000-04-14 | 2000-04-14 | Liquid polyester modified anticorrosion stress-resistant core rod for high-voltage composite insulator |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101728036B (en) * | 2010-01-26 | 2011-11-23 | 陕西泰普瑞电工绝缘技术有限公司 | Method for preparing solid core rod of one-step molded high-voltage composite insulator |
| CN101740186B (en) * | 2010-01-29 | 2011-11-23 | 陕西泰普瑞电工绝缘技术有限公司 | Method for preparing double-stage formed high-voltage compound insulator solid core rod |
| CN104177780B (en) * | 2014-08-20 | 2016-08-31 | 国家电网公司 | A kind of outdoor type electric insulation modified epoxy resin composition |
| CN104441704A (en) * | 2014-12-12 | 2015-03-25 | 广西科技大学 | Device for fabricating carbon fiber plate |
| CN107418393A (en) * | 2017-08-02 | 2017-12-01 | 合肥尚涵装饰工程有限公司 | A kind of weather-proof enamel-covered wire of low cost |
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