Composite material for home appliance shell and preparation method thereof

A technology for composite materials and shells, which is applied in the field of composite materials and its preparation for home appliance shells. It can solve problems affecting product appearance and achieve the effects of improving aesthetics, compatibility, and compatibility.

Active Publication Date: 2012-07-04
SHANGHAI KUMHO SUNNY PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the product is a high-gloss product and multiple gates converge, obvious weld lines are likely to appear at the place where the runners converge, which seriously affects the appearance of the product

Method used

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  • Composite material for home appliance shell and preparation method thereof
  • Composite material for home appliance shell and preparation method thereof
  • Composite material for home appliance shell and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0030] PC: Molecular weight 20000-30000, L-1225Y produced by Teijin Chemicals, Dow PC-201-15 or PC-201-10, Dow PC-201-15 is preferred in Examples 1-3.

[0031] ABS: Produced by Kumho, South Korea.

[0032] Compatibilizer: Styrene-polyimide-maleic anhydride-nitroaminoethylpiperazine tetrapolymer, synthesized by Kumho Sunny.

[0033] Flame retardant: bisphenol A type, BDP, produced in Great Lakes, USA.

[0034] The specific composition of each component is shown in Table 1. The particles were made according to the preparation steps, and then stretched and punched by the ASTM mold. Under the same injection molding conditions, they were injected into splines with the appearance of weld lines. The corresponding test results are as follows.

[0035] The preparation process comprises the following steps:

[0036] (1) Put PC, ABS and compatibilizer in a medium-speed mixer, and mix for 20 minutes to obtain a premix;

[0037] (2) Add the premix from the main feeding port of the twin-...

Embodiment 4

[0044] A method for preparing a composite material for a housing of an electrical appliance, the method comprising the following steps:

[0045] (1) Prepare raw materials according to the following components and parts by weight:

[0046] 70g bisphenol A type polycarbonate, 10g ABS, 5g compatibilizer, 20g fire retardant, wherein the molecular weight of polycarbonate is 20000, and ABS molecular weight is 80000, and wherein rubber content is 5wt%, and acrylonitrile content is 25wt%, Styrene content is 70wt%, and compatibilizer is styrene-polyimide-maleic anhydride-azamine ethyl piperazine copolymer, and molecular weight is 100, and flame retardant is bisphenol A-bis(diphenyl phosphoric acid ester), the molecular formula of the compatibilizer is:

[0047]

[0048] The molecular formula of bisphenol A-bis(diphenyl phosphate) is:

[0049]

[0050] (2) Polycarbonate, ABS and compatibilizer are placed in medium speed mixer, mix 20min to obtain premix;

[0051] (3) Add the pr...

Embodiment 5

[0053] A method for preparing a composite material for a housing of an electrical appliance, the method comprising the following steps:

[0054] (1) Prepare raw materials according to the following components and parts by weight:

[0055] 85g polycarbonate, 15g ABS, 4g compatibilizer, 14g flame retardant, wherein the molecular weight of polycarbonate is 30000, which is L-1225Y produced by Teijin Chemicals, the molecular weight of ABS is 150000, and the rubber content is 30wt%, acrylonitrile The content is 30wt%, the styrene content is 40wt%, the compatibilizer is styrene-polyimide-maleic anhydride-azamineethylpiperazine copolymer, the molecular weight is 10000, and the flame retardant is bisphenol A-bisphenol (diphenyl phosphate);

[0056] (2) Polycarbonate, ABS and compatibilizer are placed in medium speed mixer, mix 25min to obtain premix;

[0057](3) Add the premix from the main feeding port of the twin-screw extruder, add the flame retardant from the side feeding port of...

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Abstract

The invention relates to a composite material for a home appliance shell and a preparation method thereof. The composite material comprises the following components in part by weight: 70 to 90 parts of polycarbonate (PC), 5 to 20 parts of acrylonitrile butadiene styrene (ABS), 1 to 5 parts of compatilizer and 10 to 20 parts of flame retardant. The method comprises the following steps of: mixing the polycarbonate, the ABS and the compatilizer into a medium speed mixer to obtain a premix, adding the premix from a main feeding hole of a double-screw extruder, adding the flame retardant from a side feeding hole of the double-screw extruder, and performing melt extrusion granulation to obtain the composite material for the home appliance shell. Compared with the prior art, the invention has the advantages that: the compatibility is improved and the defect is reduced at the weld line of the material so that the attractiveness of the weld line is improved; the composite material is favorablefor improving the compatibility of PC / ABS alloy; and the appearance of the prepared product has no weld line defect, and the composite material is suitable for manufacturing product shells of home appliances and the like.

Description

technical field [0001] The invention relates to a plastic and a preparation method thereof, in particular to a composite material used for a home appliance shell and a preparation method thereof. Background technique [0002] PC is an amorphous engineering plastic with excellent impact strength, thermal stability, gloss, antibacterial properties, flame retardant properties and anti-pollution properties. However, due to its high molecular rigidity and steric hindrance, its high melting temperature (220--230 ° C) is difficult to process, and it is difficult to produce large thin-walled products, and the residual stress in the product is large, and stress cracking is prone to occur. ABS resin has good processability and mechanical properties, and ABS can improve the processability and stress cracking performance of PC materials. Generally, the compatibility between PC and ABS is good, and there is no need to add compatibilizers to improve their compatibility. However, if the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L69/00C08L55/02C08K5/523B29B9/06B29C47/92B29C48/92
CPCB29C48/04B29C48/875B29C48/92B29C2948/92704B29C2948/92895
Inventor 杨春华李文强李强罗明华辛敏琦
Owner SHANGHAI KUMHO SUNNY PLASTICS
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