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

A technology of PA6620 and composition, which is applied in the field of high CTI value flame-retardant glass fiber reinforced PA66/PE alloy composition and its preparation, which can solve the restrictions on the use of flame retardants, reduce the mechanical properties of materials, electrical insulation properties, and require hysteresis, etc. problems, to achieve short residence time, improve oxidation resistance, and reduce friction coefficient

Inactive Publication Date: 2012-10-17
SHANGHAI SUNNY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the development of flame retardants is relatively lagging behind the industry's increasing requirements for materials, the addition of many kinds of flame retardants to materials will greatly reduce the mechanical properties and electrical insulation properties of materials.
For example, compared with the tracking index (CTI) dropped from 600V to 200V or even lower, in addition, with the implementation of EU RoHs and WEEE directives, the traditional brominated flame retardant system can no longer meet this requirement, while some flame retardant The use of drugs will also be restricted

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0028] The raw materials of Examples 1 to 6 and their weight percent content are shown in Table 1; the raw materials are weighed according to the above weight percentage content; put into a high mixer and mix for 2 to 5 minutes, discharge, and then extrude with a twin-screw Extruded and granulated by machine to produce high CTI value and low segregation flame retardant glass fiber reinforced PA66 / PE alloy composition, wherein the processing temperature is 225-245°C and the screw speed is 30-40Hz; the specific processing conditions are shown in the table 2.

[0029] In Table 1, the melt index of PE is 0.5-20 grams per cubic centimeter, and PA66 is polyamide 6 with an intrinsic viscosity of 2.4 dL / g. The compound flame retardant masterbatch is made by mixing the following components by weight percentage: iron-removing red phosphorus masterbatch: 50%; anti-migration agent: 25%; high CTI additive: 25%, using compound flame retardant masterbatch Compared with the traditional flame...

Embodiment 5

[0034] Embodiment 5, performance test

[0035] The performance test and comparison of the high CTI value and low precipitation flame-retardant glass fiber reinforced PA66 / PE alloy compositions prepared in the above Comparative Examples 1-3 and Examples 1-6 were carried out according to the ASTM standard. The test performance comparison is shown in Table 3:

[0036] table 3

[0037]

[0038] It can be concluded from Table 3 that compared with Comparative Examples 1-3, the materials prepared in Examples 1-6 have better tensile strength, flexural strength, flexural modulus and impact strength. The composition of the invention has high CTI value, low precipitation, environmental protection and balanced comprehensive performance, can be widely used in the fields of electronic appliances such as contactors, circuit breaker shells, etc., and has good application prospects.

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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

technical field [0001] The invention relates to a high CTI value flame-retardant glass fiber reinforced PA66 / PE alloy composition, in particular to a high CTI value flame-retardant glass fiber reinforced PA66 / PE alloy composition and a preparation method thereof. Background technique [0002] In recent years, my country's electrical and electronic industry has developed rapidly, and the demand for high-electrical insulation and flame-retardant reinforced engineering plastics is increasing, such as low-voltage vacuum contactors, circuit breakers, leakage protectors, connectors, low-voltage switches, thin-walled electrical and electronic components, etc. It is necessary to use engineering plastic materials with good comprehensive mechanical properties, flame retardant properties and electrical insulation properties. In this product field, nylon / PE alloy is used in a large amount. However, because the development of flame retardants is relatively lagging behind the industry's i...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L23/06C08L83/04C08K13/06C08K9/06C08K7/14C08K3/02B29C47/92B29C48/92
CPCB29B7/46B29B7/72B29B7/7461B29B7/90B29B9/06B29B9/12B29B9/14B29C48/04B29C48/40B29C48/92B29C2948/9259B29C2948/92704B29C2948/92885B29C2948/92895C08J3/223C08J2323/06C08J2377/06C08K3/016C08K3/02C08K5/005C08K5/134C08K7/14C08K9/06C08K2003/026C08L23/06C08L77/02C08L77/06C08L83/04C09K21/00
Inventor 郭建鹏杨涛范潇潇娄小安
Owner SHANGHAI SUNNY
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