Polymer composite with electromagnetic absorbing ability and high thermal conductivity and manufacturing method of the same

• Main Authors: RYU, DONG RYUL, KIM, KI HYEON, CHOI, CHEOL KYU, KO, YOUNG HUI, LEE, SANG KWAN, CHOA, YONG HO, CHOI, JAE RYUNG, LEE, SANG BOK, SEO, KEUM SUK, JUNG, BYUNG MUN
• Format: Patent
• Language: English; Korean
• Published: 21.04.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INDUCTANCES; MAGNETS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PRINTED CIRCUITS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSFORMERS

The present invention relates to a polymer composite and a manufacturing method thereof. The polymer composite includes: a first thermally conductive film emitting heat generated when an electromagnetic wave is absorbed; a fiber sheet installed in the upper part of the first thermally conductive film to absorb the electromagnetic wave; and a second thermally conductive film installed in the upper part of the fiber sheet, and emitting the heat generated when the electromagnetic wave is absorbed. The fiber sheet includes a glass fiber coated with a FeCo magnetic material. The first and second thermally conductive films are formed as expanded graphite is inconsecutively and equally spread in thermoplastic resin. According to the present invention, the polymer composite comprises the fiber sheet for absorbing an electromagnetic wave and the thermally conductive films for emitting the heat generated when the electromagnetic wave is absorbed. The fiber sheet contains the glass fiber coated with the FeCo magnetic material and the thermoplastic resin, which forms a matrix of the thermally conductive films, contains the expanded graphite, and thus, the present invention is capable of having excellent electromagnetic wave absorptivity and radiating performance at the same time. 본 발명은, 전자파 흡수시 발생한 열을 방출하기 위한 제1 열전도성 필름과, 상기 제1 열전도성 필름 상부에 구비된 전자파흡수 섬유시트와, 상기 전자파흡수 섬유시트 상부에 구비되고 전자파 흡수시 발생한 열을 방출하기 위한 제2 열전도성 필름을 포함하며, 상기 전자파흡수 섬유시트는 FeCo계 자성물질로 코팅된 유리섬유를 포함하고, 상기 제1 및 제2 열전도성 필름은 열가소성 수지에 팽창흑연이 불연속적으로 균일하게 분산되어 있는 필름으로 이루어진 것을 특징으로 하는 고분자 복합체 및 그 제조방법에 관한 것이다. 본 발명에 의하면, 전자파흡수를 위한 전자파흡수 섬유시트와 전자파흡수시 발생한 열을 방출하기 위한 열전도성 필름을 포함하여 구성되어 있으며, 상기 전자파흡수 섬유시트에는 FeCo계 자성물질로 코팅된 유리섬유가 함유되어 있고, 상기 열전도성 필름의 매트릭스를 이루는 열가소성 수지에 팽창흑연이 함유되어 있어 우수한 전자파흡수성과 방열 성능을 동시에 가질 수 있다.