CN102775773A - Flame-retardant glass fiber reinforced polyamide 6/polyamide 612 (PA6/PA612) alloy composite and preparation method thereof - Google Patents
Flame-retardant glass fiber reinforced polyamide 6/polyamide 612 (PA6/PA612) alloy composite and preparation method thereof Download PDFInfo
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- CN102775773A CN102775773A CN2012102475186A CN201210247518A CN102775773A CN 102775773 A CN102775773 A CN 102775773A CN 2012102475186 A CN2012102475186 A CN 2012102475186A CN 201210247518 A CN201210247518 A CN 201210247518A CN 102775773 A CN102775773 A CN 102775773A
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Abstract
The invention relates to a flame-retardant glass fiber reinforced polyamide 6/polyamide 612 (PA6/PA612) alloy composite and a preparation method of the flame-retardant glass fiber reinforced polyamide 6/polyamide 612 (PA6/PA612) alloy composite. The composite comprises the following components in percentage by weight: 20-41 percent of polyamide 6 (PA6), 20-41 percent of polyamide 612 (PA612), 0-15 percent of compound flame-retardant masterbatch, 20-40 percent of glass fiber, 0.1-1 percent of an antioxygen and 0.1-1 percent of a lubricant dispersing agent. The preparation method of the composite comprises the following steps of: weighing each component according to the weight proportions; putting the components into a high mixing machine to mix for 2-5 minutes; discharging; and extruding and pelleting by a twin-screw extruder to process at the temperature of 225-225 DEG C under the condition of screw revolution of 30-40HZ. Compared with the prior art, the composite has the advantages of high comparative tracking index (CTI) value, low flame-retardant precipitation property, halogen-free environment friendliness, comprehensive performance equalization and the like, and can be widely applied to products of contacts, leakage protectors, circuit breaker shells and the like in the electronics field.
Description
Technical field
The present invention relates to a kind of flame-proof glass fibre and strengthen alloy material, be specifically related to a kind of flame-proof glass fibre and strengthen PA6/PA612 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 consumption of polyamide (PA) is maximum.Yet because the relative industry of development of fire retardant 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.Along with development of technology engineering plastics process of localization is also being accelerated.Rizhisheng New Technology Development Co., Ltd., Shanghai strengthens the PA6/PA612 product to high CTI value, the low fire retardant property separated out flame-proof glass fibre and has carried out deep research.The high CTI value of being developed, the low fire retardant property separated out, flame-proof glass fibre strengthen the PA6/PA612 alloy product and have successfully substituted the like product that companies such as BASF produce; Realized the production domesticization of this series products; When being included in the localization of raw material plan by some foreign capital affiliates, this material also begins to export to the European and American areas.
Summary of the invention
The objective of the invention is to overcome the defective that above-mentioned prior art exists, provide a kind of flame-proof glass fibre to strengthen PA6/PA612 alloy composite and preparation method thereof.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.
The objective of the invention is to realize through following technical scheme:
The present invention relates to a kind of flame-proof glass fibre and strengthen the PA6/PA612 alloy composite, comprise each component of following weight percent content:
Preferably, the limiting viscosity of described PA6 is 2.4dL/g.
Preferably, the limiting viscosity of described PA612 is 2.4dL/g.
Preferably, described compositional flame-retardant master batch is composite voluntarily by my company, is mixed by three kinds of components, specifically 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, described lubrication dispersing agent is a silicone.
The invention still further relates to a kind of preparation method of aforesaid flame-proof glass fibre enhancing PA6/PA612 alloy composite, 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 225～255 ℃, and the screw rod revolution is 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 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, 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.
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 PA6/PA612 alloy composite 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 PA6/PA612 alloy composite; Parameters such as the extrusion temperature of said twin screw extruder, screw rod revolution are as shown in table 2.
Embodiment 1～8
Flame-proof glass fibre strengthens the PA6/PA612 alloy composite, 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 mass percentage 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 flame-proof glass fibre enhancing PA6/PA612 alloy composite; 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 1～8
| Material name | PA6 | PA612 | The compositional flame-retardant master batch | Spun glass | Oxidation inhibitor | Lubrication dispersing agent |
| Comparative Examples 1 | 37.3 | 30 | 12 | 20 | 0.2 | 0.5 |
| Comparative Examples 2 | 33.3 | 30 | 11 | 25 | 0.2 | 0.5 |
| Comparative Examples 3 | 24.3 | 30 | 10 | 35 | 0.2 | 0.5 |
| Embodiment 1 | 39 | 40 | 0 | 20 | 0.6 | 0.4 |
| Embodiment 2 | 20 | 41 | 15 | 22.5 | 1 | 0.5 |
| Embodiment 3 | 25.3 | 30 | 9 | 35 | 0.1 | 0.6 |
| Embodiment 4 | 21.3 | 30 | 8 | 40 | 0.2 | 0.5 |
| Embodiment 5 | 22.3 | 30 | 7 | 40 | 0.2 | 0.5 |
| Embodiment 6 | 23.3 | 30 | 6 | 40 | 0.6 | 0.1 |
| Embodiment 7 | 41 | 20 | 12.8 | 25 | 0.2 | 1 |
| Embodiment 8 | 30 | 27 | 15 | 27 | 0.2 | 0.8 |
Table 2
Embodiment 9, performance test
Adopt the ASTM standard, the PA6/PA612 alloy combination matter sample to embodiment 1～8 and Comparative Examples 1～3 make carries out the performance test contrast.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, the low property the separated out flame-proof PA 6/PA12 alloy composite that adopt compositional flame-retardant master batch system of the present invention to make are 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 660V from 320V;
(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 (10)
1. a flame-proof glass fibre strengthens the PA6/PA612 alloy composite, it is characterized in that said composition comprises each component of following weight percent content:
2. flame-proof glass fibre according to claim 1 strengthens the PA6/PA612 alloy composite, it is characterized in that the limiting viscosity of described PA6 is 2.4dL/g.
3. flame-proof glass fibre according to claim 1 strengthens the PA6/PA612 alloy composite, it is characterized in that the limiting viscosity of described PA612 is 2.4dL/g.
4. flame-proof glass fibre according to claim 1 strengthens the PA6/PA612 alloy composite, it is characterized in that described 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%.
5. flame-proof glass fibre according to claim 1 strengthens the PA6/PA612 alloy composite, it is characterized in that, described spun glass is the alkali free glass fibre that handle through silane coupling agent on the surface.
6. flame-proof glass fibre according to claim 1 strengthens the PA6/PA612 alloy composite, it is characterized in that described oxidation inhibitor is Hinered phenols antioxidant.
7. flame-proof glass fibre according to claim 1 strengthens the PA6/PA612 alloy composite, it is characterized in that described lubrication dispersing agent is a silicone.
8. a flame-proof glass fibre as claimed in claim 1 strengthens the preparation method of PA6/PA612 alloy composite; 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.
9. flame-proof glass fibre according to claim 8 strengthens the preparation method of PA6/PA612 alloy composite, it is characterized in that the said blended time is 2～5 minutes.
10. flame-proof glass fibre according to claim 8 strengthens the preparation method of PA6/PA612 alloy composite, it is characterized in that the extrusion temperature of said twin screw extruder is 225～255 ℃, and the screw rod revolution is 30～40Hz.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109679338A (en) * | 2018-12-23 | 2019-04-26 | 德力西电气有限公司 | A kind of halogen-free flame-retardant polyamide alloy material of low precipitation and preparation method thereof |
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