Shielding plastic and preparation method thereof
A technology for plastics and plastic particles, applied in the field of shielding plastics and their preparation, can solve the problems of heavy weight and poor plasticity of shielding plastics, and achieve the effects of easy injection molding, excellent performance and light weight
Inactive Publication Date: 2012-10-24
SHENZHEN FRD SCI & TECH
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Problems solved by technology
[0005] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a shielding plastic and its preparation method, aiming to solve the problems of heavy weight and poor plasticity of the existing shielding plastic
Method used
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Embodiment 1
[0050] The shielding plastic is composed of: 15% conductive fiber, 65% plastic, 5% modifier, 15% halogen-free flame retardant, and the shielding plastic is prepared by the above method.
Embodiment 2
[0052] The shielding plastic is composed of: 5% conductive fiber, 65% plastic, 10% modifier, 20% halogen-free flame retardant, and the shielding plastic is prepared by the above method.
Embodiment 3
[0054] The shielding plastic is composed of: 20% conductive fiber, 70% plastic, 5% modifier, 5% halogen-free flame retardant, and the shielding plastic is prepared by the above method.
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Abstract
The invention discloses a shielding plastic and a preparation method of the shielding plastic. The shielding plastic comprises the following components in percentage by weight: 5-40% of conductive fiber, 25-80% of plastic, 5-10% of modifying agent, and 5-30% of halogen-free flame retardant. The conductive fiber and the modifying agent are mixed for a modification treatment through a coupling method. The conductive fiber is coated with the plastic through a melting solution of the plastic and the halogen-free flame retardant. The diameter of the conductive fiber is 1-10mum and the length of the conductive fiber is 1-10mm. The shielding plastic disclosed by the invention has good properties, which are particularly shown as follows: the volume resistivity is less than 1000 ohm.cm, the screening effectiveness (30MHz-18GHz) is more than10dB, the fire rating is UL 94-V0, UL 94-V1, UL 94-V2, UL 94-HB, and no halogen is generated.
Description
technical field [0001] The invention relates to the field of shielding plastics, in particular to a shielding plastic and a preparation method thereof. Background technique [0002] Shielding is the use of shields (materials with specific properties) to prevent or attenuate the transmission channel of electromagnetic interference energy, thereby suppressing electromagnetic interference. Shielding has two purposes: to limit the leakage of electromagnetic energy of internal radiation and to prevent external radiation interference from entering. The body plays the role of absorbing energy (eddy current loss), reflecting energy (interface reflection of electromagnetic wave on the shielding body) and offsetting energy to the electromagnetic interference wave from the outside and the internal electromagnetic wave, so it has the function of weakening the interference. [0003] The shielding plastics used in the shielding process are mainly metal materials, such as aluminum, copper,...
Claims
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IPC IPC(8): C08L23/06C08L23/10C08L69/00C08L55/02C08L25/04C08L27/06C08L67/02C08L81/02C08K13/06C08K9/06C08K9/04C08K7/06C08K3/22C08K3/38C08K3/02C08K3/32
Inventor 王美发
Owner SHENZHEN FRD SCI & TECH
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