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Shell material of electronic equipment and preparation method thereof

A technology for shell materials and electronic equipment, applied in the field of materials, can solve problems such as reduced strength, high cost, and low linear expansion coefficient, and achieve the effects of improving environmental adaptability, solving shell cracks and deformation, and reducing thermal expansion coefficient

Inactive Publication Date: 2016-02-03
HISENSE VISUAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase in heat generation and the temperature rise of the shell will cause the shell to deform, reduce the user's appearance experience, and seriously cause safety regulations; on the other hand, the ultra-thin and ultra-narrow design concept requires that the assembly gap between the shell and related components need to be further compressed ( Compression from 0.8mm or even greater to within 0.4mm), the traditional non-fiber-reinforced material back shell shrinks more with temperature changes, and the strength is further reduced after thinning. The dual factors lead to frequent cracking and other defects in the shell after undergoing environmental tests Phenomenon
In order to solve the cost problem caused by cracking, audio and video electronic equipment generally adopts the back shell of PC+ABS+GF scheme, PC+ABS+GF (is made of polycarbonate and acrylonitrile-butadiene-styrene copolymer The composite material with glass fiber added to the mixed plastic) is a material with high rigidity and low linear expansion coefficient, which can effectively solve the problem of shell cracking, which makes the cost about 18.95 yuan / kg, but the flame retardant grade can only reach UL94V0, which cannot Meet the flame retardant requirements of information technology electronic equipment enclosures
Information technology electronic equipment in the prior art usually uses a metal back shell, and the cost is about 100 yuan / piece, which is relatively high

Method used

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  • Shell material of electronic equipment and preparation method thereof
  • Shell material of electronic equipment and preparation method thereof
  • Shell material of electronic equipment and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0028] The preparation method of the shell material is:

[0029] 1) Put glass fiber, HIPS and lubricant into a high-speed mixer, stir evenly, then add flame retardant, antioxidant and carbon black powder in turn, and stir evenly;

[0030] 2) Transfer the uniformly mixed materials above to the hopper of the twin-screw extruder, turn on the twin-screw extruder, and control the temperatures of the front, middle, rear and head of the barrel to 165-170°C, 180-190°C, 195-205°C, 210-230°C, wherein the head screw speed is controlled at 200-230rpm / min, extruded to obtain molten material;

[0031] 3) The above molten material is water-cooled, pelletized, sieved, and dried to obtain the HIPS composite shell material of the present invention.

[0032] The flame retardant is one or a mixture of bisphenol A-bis(diphenyl phosphate) (BDP), decabromodiphenylethane, antimony trioxide and bromotriazine.

[0033] The antioxidant is tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pen...

Embodiment 1

[0035]The shell material of an electronic device of the present invention has the following components and parts by weight: 70 parts of polystyrene, 20 parts of glass fiber, 5 parts of flame retardant, 5 parts of antioxidant, and 1 part of paraffin wax as lubricant. The flame retardant includes 1 part of BDP, 2 parts of antimony trioxide and 2 parts of bromotriazine; the antioxidant includes 2 parts of (antioxidant 1010), 1 part of (antioxidant 1076) and (antioxidant 168) 2 servings.

[0036] The preparation method is to put glass fiber, HIPS and lubricant into a high-speed mixer, stir evenly, then add flame retardant system and antioxidant in turn, and stir evenly. Transfer the uniformly mixed material above to the hopper of the twin-screw extruder, turn on the twin-screw extruder, and control the temperatures of the front, middle, rear and head of the barrel to 168°C, 185°C, and 200°C respectively. ℃, 220℃, wherein the head screw speed is controlled at 220rpm / min; the molte...

Embodiment 2

[0038] A shell material for electronic equipment of the present invention, its components and parts by weight are: 80 parts of polystyrene, 10 parts of glass fiber, 8 parts of flame retardant, 4 parts of antioxidant, and the lubricant is polyethylene wax and stearin There are 2 parts of the mixture of acid zinc and 1 part of carbon black powder. The flame retardant includes 5 parts of BDP and 3 parts of bromotriazine; the antioxidant includes 0.5 parts of (antioxidant 1010), 2 parts of (antioxidant 1076) and 1.5 parts of (antioxidant 168).

[0039] The preparation method is to put glass fiber, HIPS and lubricant into a high-speed mixer, stir evenly, then add flame retardant system, antioxidant and carbon black powder in sequence, and stir evenly. Transfer the uniformly mixed material above to the hopper of the twin-screw extruder, turn on the twin-screw extruder, and control the temperatures of the front, middle, rear and head of the barrel to 165°C, 180°C, and 195°C respectiv...

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Abstract

The invention discloses a shell material of electronic equipment and a preparation method thereof. The shell material comprises the following components in parts by weight: 70-95 parts of polystyrene, 10-25 parts of glass fiber, 5-16 parts of a flame retardant, 4-7 parts of an antioxidant, and 1-3 parts of a lubricant. The preparation method comprises the following steps: uniformly stirring glass fiber, polystyrene and a lubricant, sequentially adding a flame retardant and an antioxidant, and uniformly stirring the obtained mixture; transporting the obtained object to a feed hopper of a twin-screw extruder, starting the twin-screw extruder, so that a molten material is extruded; and sequentially carrying out water cooling, grain-sized dicing, sieving and drying on the molten material, so that the HIPS composite shell material disclosed by the invention is obtained. The shell material disclosed by the invention is capable of effectively improving the flame retardant rating and rigidity of shells, satisfying the requirements of information equipment on security specifications, and improving the fire prevention coefficients of electrical and electronic equipment.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a heat-resistant and dimensionally stable low-cost shell meeting the technical requirements of electronic equipment. Background technique [0002] Today's electronic equipment, taking smart TV as an example, smart TV is moving towards a trend of thinner thickness and larger screen, so the heat generated by smart TV during use is increasing, and the rigidity and heat resistance of the shell material are required also gradually increased. The increase in heat generation and the temperature rise of the shell will cause the shell to deform, reduce the user's appearance experience, and seriously cause safety regulations; on the other hand, the ultra-thin and ultra-narrow design concept requires that the assembly gap between the shell and related components need to be further compressed ( Compression from 0.8mm or even greater to within 0.4mm), the traditional non-fiber-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/04C08K13/04C08K7/14C08K5/523C08K5/03C08K3/22C08K5/3492C08K5/134C08K5/526
Inventor 孙言丽何洋
Owner HISENSE VISUAL TECH CO LTD
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