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Plastic case material for breaker and preparation method thereof

A shell material and circuit breaker technology, which is applied in the field of plastic shell materials for circuit breakers and its preparation, can solve the problems of poor toughness, insufficient heat resistance, and powder pollution of filled flame-retardant nylon bodies, and solve the problems of glass fiber exposure and warping bending problems, high breaking strength and modulus of elasticity, effects of high strength and toughness

Active Publication Date: 2011-06-29
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this causes the second problem, the filled flame retardant nylon system has poor toughness, insufficient heat resistance, and is not easy to process
Many companies fill nylon with isotropic fillers such as talcum powder, mica or glass beads. Although this can solve the problems of glass fiber exposure and warping, compared with glass fiber reinforced systems, the strength and toughness of the system will be reduced by half. Even more, the heat-resistant temperature will be lowered by tens of degrees, and because the flame retardant and filler of this system are powder materials, it is difficult to cut the material during the extrusion process, and the powder pollution is serious

Method used

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  • Plastic case material for breaker and preparation method thereof
  • Plastic case material for breaker and preparation method thereof
  • Plastic case material for breaker and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0034] A method for preparing a plastic casing material for a circuit breaker, the method comprising the following steps:

[0035] (1) Material preparation: The required raw materials are as follows: PA66: nylon 66; GF: commercially available alkali-free glass fiber with a diameter of 13 μm; CaSiO 3 : commercially available wollastonite, with an aspect ratio of 60; SI: commercially available whisker silicon; Talc: commercially available talcum powder; GB: commercially available glass beads; polybrominated styrene; antimony trioxide; antioxidant : Irganox 1098 produced by Ciba Specialty Chemicals, Switzerland; lubricant: ethylene vinyl acetate copolymer. The content of each component is shown in Table 1.

[0036] (2) Put nylon resin, glass fiber, filler, flame retardant and various additives through a high-speed mixer, control the stirring rate at 800-1000rpm for high-speed mixing, and then control the process temperature at 250-290°C, The composition can be obtained by carry...

Embodiment 3

[0047] A method for preparing a plastic casing material for a circuit breaker, the method comprising the following steps:

[0048] (1) Prepare raw materials according to the following components and contents: nylon 622g, alkali-free glass fiber 25g, commercially available silicon carbide whiskers 25g, commercially available melamine 20g and silicone 6g, commercially available heat stabilizer TNP 0.05g, commercially available UV Stabilizer 0.05g. The diameter of the alkali-free glass fiber is 6 μm.

[0049] (2) Control the speed of the high mixer to 800-1000rpm, mix the above raw materials at a high speed through the high mixer, and then control the temperature to 220-270°C, and cut the mixture into pellets through a twin-screw extruder. product.

Embodiment 4

[0051] A method for preparing a plastic casing material for a circuit breaker, the method comprising the following steps:

[0052](1) Prepare raw materials according to the following components and contents: nylon 6680g, alkali-free glass fiber 5g, commercially available silicon nitride whiskers 5g, commercially available red phosphorus 8g and antimony trioxide 2g, commercially available lubricant silicone oil 0.5g, 0.5 g of commercially available silane coupling agent, 0.5 g of commercially available processing stabilizer calcium stearate, and 0.5 g of commercially available nucleating agent EPR. Among them, the diameter of the alkali-free glass fiber is 18 μm.

[0053] (2) Control the speed of the high mixer to 800-1000rpm, mix the above raw materials at a high speed through the high mixer, and then control the temperature to 220-290°C, and cut the mixture into strands through a twin-screw extruder to obtain product.

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Abstract

The invention relates to a plastic case material for a breaker and a preparation method thereof. The material comprises the following components in parts by weight: 22-80 parts of nylon, 5-25 parts of glass fiber, 5-25 parts of needle-like filling material, 8-20 parts of fire retardant, 2-6 parts of auxiliary fire retardant and 0.1-2 parts of other auxiliaries. The preparation method comprises the following steps: evenly mixing the raw materials with a high-speed mixer at a high speed; and then bracing and pelleting the mixed materials with a screw extruder at the temperature of 220 DEG C-290DEG C to obtain the plastic case material. Compared with the prior art, the plastic case material has high breaking strength and elastic modulus, the strength of a compound material is barely influenced by a proper addition of the raw materials, and the obtained product has the advantages of no glass fiber rich surface, no buckling deformation, high strength and good heat resistance.

Description

technical field [0001] The invention relates to a plastic casing material and a preparation method thereof, in particular to a plastic casing material for a circuit breaker and a preparation method thereof. Background technique [0002] Circuit breakers are the most widely used terminal protection appliances in building electrical terminal power distribution devices. Although it is a terminal electrical appliance, its application is large and wide. Miniature circuit breakers are widely used in various occasions such as construction projects and civil lighting because of their superior performance, convenient use, and reasonable price. [0003] Circuit breakers can be divided into two categories: universal type and plastic case type in terms of structure and function. The shell of universal circuit breaker is generally made of thermosetting material. The shell of circuit breaker made of this material has good toughness and is not afraid of falling, but the heat resistance is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08L77/02C08L77/06C08K13/04C08K7/14C08K7/10C08K7/08C08K7/04C08K3/22C08L25/04C08L25/18C08L83/04C08K5/3492C08K3/02C08K3/32C08K3/38C08K5/523H01H71/02
Inventor 吕励耘
Owner HEFEI GENIUS NEW MATERIALS
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