CN102731977A - Fire-retardant glass fiber reinforced PET (Polyethylene Terephthalate) composition with high CTI (Comparative Tracking Index) value and preparation method thereof - Google Patents
Fire-retardant glass fiber reinforced PET (Polyethylene Terephthalate) composition with high CTI (Comparative Tracking Index) value and preparation method thereof Download PDFInfo
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- CN102731977A CN102731977A CN2012102472489A CN201210247248A CN102731977A CN 102731977 A CN102731977 A CN 102731977A CN 2012102472489 A CN2012102472489 A CN 2012102472489A CN 201210247248 A CN201210247248 A CN 201210247248A CN 102731977 A CN102731977 A CN 102731977A
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Abstract
The invention discloses a fire-retardant glass fiber reinforced PET (Polyethylene Terephthalate) composition with high CTI (Comparative Tracking Index) value and a preparation method thereof. The composition comprises the following components in percentage by weight: 45-80% of PET, 0.5-10% of a compatilizer, 1-15% of compound fire-retardant masterbatch, 5-40% of glass fiber, 0.1-1% of an antioxidant and 0.1-1% of a lubricant dispersant. The preparation method comprises the following steps of: according to the weight ratio, weighing the above materials and mixing the materials in a high mixing machine for 2-5 minutes, discharging, and then extruding the materials for granulation via a twin-screw extruder, wherein the processing temperature is 230-250 DEG C and the revolutions of the screws are 30-40Hz. Compared with the prior art, the fire-retardant glass fiber reinforced PET composition with high CTI value and the preparation method thereof disclosed by the invention have the advantages of high CTI value, low fire retardant separation property, non-halogen, good environmental performance and balanced overall performance and can be widely applied to products in the fields of electricity and electronics, such as contactors, leakage protectors, breaker shells and the like.
Description
Technical field
The present invention relates to flame-proof glass fibre REINFORCED PET field of materials, relate in particular to a kind of high CTI value flame-proof glass fibre REINFORCED PET composition and method of making the same.
Background technology
In recent years; The electric industrial boom of China; Increasing demand to the fire-retardant enhancement engineering plastics of high electric insulation increases, all need be with the engineering plastic materials with good comprehensive mechanical properties, flame retardant properties and electrical insulation capability like low-voltage vacuum contactor, isolating switch, earth leakage protective device, connector, low-tension switch, the electric element of thin-walled etc.In this product scope, the consumption of polyester is very big.Yet because the relative industry of development of fire retardant relatively lags behind concerning the requirement that material improves day by day, a variety of fire retardants join mechanical property, the electrical insulation capability that can greatly reduce material in the material.For example, phase ratio creepage tracking index (CTI) drops to 200V even lower from 600V, and in addition, along with the enforcement of RoHs of European Union and WEEE instruction, traditional bromine is that flame-retardant system can not satisfy this requirement, and the use of some fire retardant simultaneously also can be restricted.
Summary of the invention
The objective of the invention is to overcome the defective that above-mentioned prior art exists, a kind of high CTI value flame-proof glass fibre REINFORCED PET composition and method of making the same is provided.
The objective of the invention is to realize through following technical scheme:
The present invention relates to a kind of high CTI value flame-proof glass fibre REINFORCED PET compsn, comprise each component of following weight percent content:
PET 45～80％，
Compatilizer 0.5～10%,
Compositional flame-retardant master batch 1～15%,
Spun glass 15～40%,
Oxidation inhibitor 0.1～1%,
Lubrication dispersing agent 0.1～1%.
Preferably, said PET limiting viscosity is 0.8～1.5dL/g.
Preferably, said compositional flame-retardant master batch comprises each component of following weight percent content: deironing red phosphorus master batch 50%; Antimigration agent 25%; High CTI auxiliary agent 25%.
Preferably, said spun glass is the alkali free glass fibre that handle through silane coupling agent on the surface.
Preferably, said oxidation inhibitor is Hinered phenols antioxidant.
Preferably, said lubrication dispersing agent is a silicone.
The invention still further relates to a kind of aforesaid high CTI value flame-proof glass fibre REINFORCED PET preparation of compositions method, be specially: said each component is put into high-speed mixer and mixing by weight ratio, discharging, the twin screw extruder extruding pelletization gets final product.
Preferably, the said blended time is 2～5 minutes.
Preferably, the extrusion temperature of said twin screw extruder is 230～250 ℃, and the screw rod revolution is at 30～40HZ.
Compared with prior art, the present invention has following beneficial effect:
1, adopt compositional flame-retardant master batch system, compare with traditional fire-retardant master granule, compositional flame-retardant master batch system has following characteristics:
1) comprehensive mechanical property is higher; 2) can CTI be brought up to 650V from 400V; 3) overcome the product surface that common red phosphorus moves under certain condition, under the effect of oxygen G&W, finally to form the mordant phosphorus of metallic article be the defective of acidic substance to red phosphorus then.
2, the oxidation inhibitor that adopts is Hinered phenols antioxidant, can improve compsn in the antioxidant property of the course of processing and the ageing resistance in the use.
3, adopt silicone as lubricant, improve the materials processed flowability, reduce frictional coefficient; Improve smooth property, under specific processing conditions, adopt dispersiveness better, the residence time is short; Shear weak slightly combination, prevent that fire retardant from decomposing, thereby guaranteed the steady quality of material.
4, have high CTI value, the low fire retardant property separated out, halogen-free environmental, over-all properties is balanced, can be widely used in the product of field of electronics such as contactor, earth leakage protective device, case for circuit breaker.
Embodiment
Below in conjunction with specific embodiment the present invention is elaborated.Following examples will help those skilled in the art further to understand the present invention, but not limit the present invention in any form.Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement.These all belong to protection scope of the present invention.
The limiting viscosity of the PET that adopts in following examples and the Comparative Examples is 0.8～1.5dL/g; Spun glass is the alkali free glass fibre that handle through silane coupling agent on the surface; Oxidation inhibitor is Hinered phenols antioxidant; Lubrication dispersing agent is a silicone; Compatilizer is the compatilizer that rises of day.
Comparative Examples 1～3
Flame-proof glass fibre REINFORCED PET compsn comprises each component of the weight percent content shown in the table 1; Its preparation method is following:
(1) takes by weighing raw material by the weight percent content shown in the table 1, put into high-speed mixer and mixing 2～5 minutes, discharging;
(2) above-mentioned mixed raw materials is added twin screw extruder, extruding pelletization, both said flame-proof glass fibre REINFORCED PET compsn; Parameters such as the extrusion temperature of said twin screw extruder, screw rod revolution are as shown in table 2.
Embodiment 1～4
High CTI value flame-proof glass fibre REINFORCED PET compsn comprises each component of the weight percent content shown in the table 1; Its preparation method is following:
(1) takes by weighing raw material by the weight percent content shown in the table 1, put into high-speed mixer and mixing 2～5 minutes, discharging; Compositional flame-retardant master batch in the table 1 comprises each component of following weight percent content: deironing red phosphorus master batch: 50%; Antimigration agent: 25%; High CTI auxiliary agent: 25%;
(2) above-mentioned mixed raw materials is added twin screw extruder, extruding pelletization, both said high CTI value flame-proof glass fibre REINFORCED PET compsn; Parameters such as the extrusion temperature of said twin screw extruder, screw rod revolution are as shown in table 2.
The formula for raw stock of table 1 Comparative Examples 1～3 and embodiment 1～4
Table 2
Embodiment 5, performance test
Adopt the ASTM standard,, carry out the performance test contrast the composition sample that embodiment 1～4 and Comparative Examples 1～3 make.The test performance contrast is as shown in table 3:
Table 3
Can know that by table 3 embodiment 1 compares with Comparative Examples 1,2,3, the high CTI value flame-proof glass fibre REINFORCED PET compsn that adopts compositional flame-retardant master batch system of the present invention to make is described, have following some advantage:
(1) comprehensive mechanical property is higher: on mechanical performance indexs such as tensile strength, flexural strength, modulus in flexure, shock strength, all obtain bigger raising;
(2) the CTI value is higher: CTI is brought up to 650V from 400V;
(3) pH value that obtains of corrosion test becomes neutrality by acidity; Explain that the compositional flame-retardant master batch system that the present invention adopts has overcome the product surface that common red phosphorus moves in traditional fire-retardant master granule system under certain condition, under the effect of oxygen G&W, finally to form the mordant phosphorus of metallic article be the defective of acidic substance to red phosphorus then.
In sum, compsn of the present invention has high CTI value, the low fire retardant property separated out, halogen-free environmental, and advantages such as over-all properties equilibrium can be widely used in the product of field of electronics such as contactor, earth leakage protective device, case for circuit breaker.
Claims (9)
1. a high CTI value flame-proof glass fibre REINFORCED PET compsn is characterized in that, comprises each component of following weight percent content:
PET 45～80％，
Compatilizer 0.5～10%,
Compositional flame-retardant master batch 1～15%,
Spun glass 15～40%,
Oxidation inhibitor 0.1～1%,
Lubrication dispersing agent 0.1～1%.
2. high CTI value flame-proof glass fibre REINFORCED PET compsn according to claim 1 is characterized in that said PET limiting viscosity is 0.8～1.5dL/g.
3. high CTI value flame-proof glass fibre REINFORCED PET compsn according to claim 1 is characterized in that said compositional flame-retardant master batch comprises each component of following weight percent content: deironing red phosphorus master batch 50%; Antimigration agent 25%; High CTI auxiliary agent 25%.
4. high CTI value flame-proof glass fibre REINFORCED PET compsn according to claim 1 is characterized in that, said spun glass is the alkali free glass fibre that handle through silane coupling agent on the surface.
5. high CTI value flame-proof glass fibre REINFORCED PET compsn according to claim 1 is characterized in that said oxidation inhibitor is Hinered phenols antioxidant.
6. high CTI value flame-proof glass fibre REINFORCED PET compsn according to claim 1 is characterized in that said lubrication dispersing agent is a silicone.
7. high CTI value flame-proof glass fibre REINFORCED PET preparation of compositions method as claimed in claim 1; It is characterized in that said preparation method is specially: said each component is put into high-speed mixer and mixing, discharging by weight ratio; The twin screw extruder extruding pelletization gets final product.
8. high CTI value flame-proof glass fibre REINFORCED PET preparation of compositions method according to claim 7 is characterized in that the said blended time is 2～5 minutes.
9. high CTI value flame-proof glass fibre REINFORCED PET preparation of compositions method according to claim 7 is characterized in that the extrusion temperature of said twin screw extruder is 230～250 ℃, and the screw rod revolution is at 30～40HZ.
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| CN2012102472489A CN102731977A (en) | 2012-07-17 | 2012-07-17 | Fire-retardant glass fiber reinforced PET (Polyethylene Terephthalate) composition with high CTI (Comparative Tracking Index) value and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435978A (en) * | 2012-12-19 | 2013-12-11 | 安徽科聚新材料有限公司 | PET composite material and preparation method thereof |
| CN106087097A (en) * | 2016-06-08 | 2016-11-09 | 广东工业大学 | A kind of Polyester Fibers and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101440203A (en) * | 2007-11-19 | 2009-05-27 | 上海日之升新技术发展有限公司 | Environment-protective flame-retardant reinforced polyethylene glycol terephthalate resin composition and preparation thereof |
| CN102382464A (en) * | 2011-09-07 | 2012-03-21 | 上海日之升新技术发展有限公司 | High-CTI (comparative tracking index) value and low-corrosivity red phosphorus flame-retarding glass fiber reinforced PA66 (polyamide 66) material and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101440203A (en) * | 2007-11-19 | 2009-05-27 | 上海日之升新技术发展有限公司 | Environment-protective flame-retardant reinforced polyethylene glycol terephthalate resin composition and preparation thereof |
| CN102382464A (en) * | 2011-09-07 | 2012-03-21 | 上海日之升新技术发展有限公司 | High-CTI (comparative tracking index) value and low-corrosivity red phosphorus flame-retarding glass fiber reinforced PA66 (polyamide 66) material and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103435978A (en) * | 2012-12-19 | 2013-12-11 | 安徽科聚新材料有限公司 | PET composite material and preparation method thereof |
| CN106087097A (en) * | 2016-06-08 | 2016-11-09 | 广东工业大学 | A kind of Polyester Fibers and preparation method thereof |
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