Bracket for protecting LCD of portable display device
A display device, portable technology, used in instruments, optics, nonlinear optics, etc., can solve the problems of product quality degradation, difficulty in processing resin resin, high surface resistance and low conductivity, etc.
Inactive Publication Date: 2013-04-24
CHEIL IND INC
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AI Technical Summary
Problems solved by technology
However, a high fiber content in the resin reduces impact strength and fluidity, causes difficulties in the practical application of the resin due to difficulties in processing the resin, and high surface resistance causes too low electrical conductivity to be used as a resin for electronic devices. Material
[0005] Specifically, when a polyamide resin is used as a base resin, the resin causes deterioration in the quality of the product due to its low dimensional stability and high hygroscopicity, and makes it difficult to maintain a high filler loading on a low-fluidity matrix Amount (filler loading)
Method used
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Experimental program
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Effect test
Embodiment 1-10
[0128] Aromatic polyamide and aliphatic polyamide were placed in an extruder in the amounts listed in Table 1 below, and melted therein. Then, the carbon fibers are passed through the molten mixture to impregnate the carbon fibers in the mixture, followed by pelletization to produce long pellets. The prepared pellets were subjected to injection molding in a 10 oz injection molding machine to prepare a scaffold. The physical properties of each of the prepared scaffolds were evaluated according to the following methods, and the results are shown in Table 1.
[0129] assessment method:
[0130] (1) Spiral flow: measure the length (mm) of the spiral flow at 300°C according to the 1 mm standard.
[0131](2) Flexural modulus: The flexural modulus was evaluated according to ASTM D790, and the result was given in GPa.
[0132] (3) Bending strength: The bending strength was evaluated according to ASTM D790, and the result was given in MPa.
[0133] (4) Izod impact strength (unnotch...
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Abstract
A bracket protecting LCD for a portable display product is provided to improve modulus, impact strength, productivity, dimensional stability, and molding accuracy. CONSTITUTION: A bracket protecting LCD for a portable display product comprises polyamide resin and carbon fiber with weight ratio of 20~40 weight% to 60~80 weight%. The polyamide resin comprises aromatic poly amide and aliphatic polyamide which contains C10~20 aliphatic group. The aromatic polyamide is either wholly aromatic polyamide, semi-aromatic polyamide, or a mixture thereof. The aromatic polyamide contains polyamide marked in chemical formula 1. A glass transition temperature of the aromatic poly amide is 80-120deg.C.
Description
technical field [0001] The invention relates to a bracket for protecting an LCD of a portable display device (equipment) and a manufacturing method thereof. More particularly, the present invention relates to a bracket for protecting an LCD of a display device, which has excellent mechanical strength and EMI shielding effect (EMI shielding effect), in order to reduce production costs by replacing existing magnesium-based materials, and Exhibits excellent flexibility and low moisture absorption, and the fabrication method of the scaffold. Background technique [0002] For IT products, the stand acts as a frame for LCD protection and EMI shielding, and must have high rigidity and EMI shielding capability. Recently, metal materials such as magnesium, aluminum, stainless steel, etc. are used for brackets, frames, etc. Specifically, light metals such as magnesium are commonly used in portable display devices such as mobile phones, notebook computers, personal digital assistants...
Claims
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IPC IPC(8): C08J5/04C08L77/00C08K7/06C08K3/04G02F1/1335
CPCC08J2377/02C08K3/04C08J2377/06C08L77/02C08L77/06C08J5/042C08K7/06C08K3/041C08L77/10C08K3/042
Inventor 申赞均林润淑朴志权金杜映朴康烈
Owner CHEIL IND INC