CN102732021A - High CTI (Comparative Tracking Index) flame retardant glass fiber reinforced PA66 (Polyamide 66)/PE (Polyethylene) alloy composite and preparation method thereof - Google Patents

High CTI (Comparative Tracking Index) flame retardant glass fiber reinforced PA66 (Polyamide 66)/PE (Polyethylene) alloy composite and preparation method thereof Download PDF

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CN102732021A
CN102732021A CN2012102473617A CN201210247361A CN102732021A CN 102732021 A CN102732021 A CN 102732021A CN 2012102473617 A CN2012102473617 A CN 2012102473617A CN 201210247361 A CN201210247361 A CN 201210247361A CN 102732021 A CN102732021 A CN 102732021A
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alloy composite
high cti
glass fibre
strengthens
flame
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CN102732021B (en
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郭建鹏
杨涛
范潇潇
娄小安
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Shanghai Rizhisheng New Technology Development Co Ltd
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Shanghai Rizhisheng New Technology Development Co Ltd
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Abstract

The invention relates to a high CTI (Comparative Tracking Index) flame retardant glass fiber reinforced PA66 (Polyamide 66)/PE (Polyethylene) alloy composite and a preparation method thereof. The compound comprises the components by weight as follows: 20-41% of PA66, 20-41% of PE, 0-10% of compatilizer, 0-15% of compound flame retardant master batch, 20-40% of glass fiber, 0.1-1% of antioxidant, and 0.1-1% of lubricating dispersant. The preparation method comprises the steps of weighing the components by weight percentage, placing the components in a high mixing machine to be mixed for 2-5 minutes; discharging; and then extruding and pelleting by a double-screw extruder, wherein the processing temperature is 225-245 DEG C and revolution of a screw is 30-40HZ. Compared with the prior art, the alloy composite provided by the invention has the advantages of high CTI value, low precipitation, environment-friendliness, balanced comprehensive performance and the like, can be widely applied to the field of electronics such as a contactor, and a circuit breaker shell and the like, and has good application prospect.

Description

The high CTI value flame-proof glass fibre strengthens PA66/PE alloy composite and preparation method thereof
Technical field
The present invention relates to a kind of high CTI value flame-proof glass fibre and strengthen the PA66/PE alloy composite, especially relate to a kind of high CTI value flame-proof glass fibre and strengthen PA66/PE alloy composite and preparation method thereof.
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 large usage quantity of nylon/PE alloy.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 strengthen PA66/PE alloy composite and preparation method thereof for the deficiency that overcomes above-mentioned prior art existence provides a kind of high CTI value flame-proof glass fibre.Material of the present invention has high CTI value, the low property separated out, environmental protection, and over-all properties is balanced, can be widely used in field of electronics such as contactor, earth leakage protective device, case for circuit breaker.
The present invention can realize through following technical scheme:
The present invention relates to a kind of high CTI value flame-proof glass fibre and strengthen the PA66/PE alloy composite, said alloy composite comprises each component of following weight percentage:
PA66 20～41％，
PE 20～41％，
Compatilizer 0～10%,
Compositional flame-retardant master batch 0～15%,
Spun glass 20～40%,
Oxidation inhibitor 0.1～1%,
Lubrication dispersing agent 0.1～1%.
Preferably, said PA66 is a polyamide 6, and its limiting viscosity is 2.4dL/g.
Preferably, the melting index of said PE be 0.5～20 the gram/every cubic centimetre.
Preferably, said compositional flame-retardant master batch is that component by following weight percent content mixes: deironing red phosphorus master batch: 50%; Antimigration agent: 25%; High CTI auxiliary agent: 25%.
Preferably, said spun glass is an alkali free glass fibre, and handle through silane coupling agent on its surface.
Preferably, said oxidation inhibitor is Hinered phenols antioxidant.
Preferably, said lubrication dispersing agent is a silicone.
The invention still further relates to the preparation method of above-mentioned high CTI value flame-proof glass fibre enhancing PA66/PE alloy mixture, comprise the steps: to weigh said raw material by above-mentioned weight percent content; Put into high-speed mixer and mixing 2～5 minutes, the twin screw extruder extruding pelletization is used in discharging then, and processing temperature is at 225～245 ℃, 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 660V from 320V; 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 adds is that a kind of 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.
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.
Comparative Examples 1～3
The raw material and the weight percent content thereof of Comparative Examples 1～3 are as shown in table 1; Weigh said raw material by above-mentioned weight percent content; Put into high-speed mixer and mixing 2～5 minutes, the twin screw extruder extruding pelletization is used in discharging then, makes high CTI value, the low property separated out flame-proof glass fibre enhancing PA66/PE alloy composite, and wherein, processing temperature is at 225～245 ℃, and the screw rod revolution is at 30～40Hz; Concrete processing situation is as shown in table 2.
Embodiment 1～6
Raw material and the weight percent content thereof of embodiment 1～6 are as shown in table 1; Weigh said raw material by above-mentioned weight percent content; Put into high-speed mixer and mixing 2～5 minutes, the twin screw extruder extruding pelletization is used in discharging then, makes high CTI value, the low property separated out flame-proof glass fibre enhancing PA66/PE alloy composite, and wherein, processing temperature is at 225～245 ℃, and the screw rod revolution is at 30～40Hz; Concrete processing situation is as shown in table 2.
In the table 1, the melting index of PE be 0.5～20 the gram/every cubic centimetre, PA66 is a polyamide 6, its limiting viscosity is 2.4dL/g.The compositional flame-retardant master batch is that the component by following weight percent content mixes: deironing red phosphorus master batch: 50%; Antimigration agent: 25%; High CTI auxiliary agent: 25%, adopt compositional flame-retardant master batch system, to 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 660V from 320V; 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.Spun glass is an alkali free glass fibre, and handle through silane coupling agent on its surface.Oxidation inhibitor is Hinered phenols antioxidant, can improve compsn in the antioxidant property of the course of processing and the ageing resistance in the use.Lubrication dispersing agent is a silicone, adopts silicone as lubricant, improves the materials processed flowability, reduces 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.
Table 1
Figure BDA00001894870100031
Table 2
Figure BDA00001894870100041
Embodiment 5, performance test
High CTI value, the low property separated out flame-proof glass fibre that above-mentioned Comparative Examples 1～3 and embodiment 1～6 are made strengthen the PA66/PE alloy composite and carry out the performance test contrast, adopt the ASTM standard.The test performance contrast is as shown in table 3:
Table 3
Figure BDA00001894870100042
Drawn by table 3: compare with Comparative Examples 1～3, embodiment 1～6 makes material and has better tensile strength, flexural strength, modulus in flexure and shock strength.Compsn of the present invention has high CTI value, the low property separated out, environmental protection, and over-all properties is balanced, can be widely used in field of electronics such as contactor, case for circuit breaker, and good prospects for application is arranged.

Claims (8)

1. a high CTI value flame-proof glass fibre strengthens the PA66/PE alloy composite, it is characterized in that said alloy composite comprises each component of following weight percentage:
PA66 20～41％，
PE 20～41％，
Compatilizer 0～10%,
Compositional flame-retardant master batch 0～15%,
Spun glass 20～40%,
Oxidation inhibitor 0.1～1%,
Lubrication dispersing agent 0.1～1%.
2. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PE alloy composite, it is characterized in that said PA66 is a polyamide 6, and its limiting viscosity is 2.4dL/g.
3. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PE alloy composite, it is characterized in that, the melting index of described PE is 0.5～20 gram/every cubic centimetre.
4. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PE alloy composite, it is characterized in that, said compositional flame-retardant master batch is that the component by following weight percent content mixes: deironing red phosphorus master batch: 50%; Antimigration agent: 25%; High CTI auxiliary agent: 25%.
5. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PE alloy composite, it is characterized in that said spun glass is an alkali free glass fibre, and handle through silane coupling agent on its surface.
6. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PE alloy composite, it is characterized in that said oxidation inhibitor is Hinered phenols antioxidant.
7. high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PE alloy composite, it is characterized in that said lubrication dispersing agent is a silicone.
8. one kind prepares the method that high CTI value flame-proof glass fibre as claimed in claim 1 strengthens the PA66/PE alloy composite; It is characterized in that, comprise the steps: to weigh each component, put into high-speed mixer and mixing 2～5 minutes by above-mentioned weight percent content; Discharging; Use the twin screw extruder extruding pelletization then, processing temperature is at 225～245 ℃, and the screw rod revolution is at 30～40Hz.
CN201210247361.7A 2012-07-17 2012-07-17 High CTI value flame-proof glass fibre reinforced plastic PA66/PE alloy composite and preparation method thereof Expired - Fee Related CN102732021B (en)

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CN104945900A (en) * 2015-07-29 2015-09-30 苏州新区华士达工程塑胶有限公司 Low-temperature resistant toughening automobile-used plastic

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