A ROLL-TYPE COMPOSITE SHEET WITH ENHANCED HEAT-RELEASING, ELECTROMAGNETIC WAVE- AND IMPACT-ABSORBING PROPERTIES, AND A METHOD FOR PREPARATION OF THE SAME

摘要

the present invention is an electromagnetic wave and heat dissipation characteristics and improved impact absorption characteristics type roll (roll type) of the composite sheet As the manufacturing method, (a) a viscosity at 25 2,000 cSt ( / s) or less viscosity of the silicone gel and a viscosity of from 25 2,000 cSt ( / s) than the silicone gel having a high viscosity was mixed stirring in silicone gel composition comprising: 20-58 wt% of a planetary mixer (planetary mixer); (B) the Fe-Si, Fe-Cr, Fe-Ni, Fe-Al, Fe-Al-Si and Fe-Cr-Si amount by the mesh 20 to 40% by weight of the electromagnetic wave absorbing powder is selected from the group consisting of step stirring 5-20 minutes while adding passing; (C) an alumina, silica, magnesia, silicon nitride, heat is selected from the group consisting of graphite and carbon (thermal theft) while adding 20 to 40% by weight of the powder was passed through a small amount by a mesh comprising stirred 5-20 minutes; (D) toluene, siloxane and solvent by the addition of 1 to 10% by weight solvent is selected from the group consisting of naphtha, the viscosity of the reaction product [a silicone gel composition, the powder mixture for powder and radiating the electromagnetic wave absorption (heat conductivity); Steps to create a paste while adjusting; (E) degassing step of removing bubbles by using a deaerator; And (f) at 80~140 using a comma coater (comma coater) for coating the reaction product on the release sheet and paste the degassing includes the step of generating a composite sheet of the curing and drying, roll-type (roll type) characterized in that there is provided a method. In addition, the present invention provides a composite sheet of the heat dissipation and electromagnetic waves, and shock-absorbing properties are improved roll-type, manufactured by the method described above, and the hardness 50~70 Shore A, the thickness of the composite sheet provides a 1~2 mm . ; reduction according to the manufacturing method of the heat-radiating property and an electromagnetic wave and a shock-absorbing properties are improved roll-type composite sheet of the present invention, does not need to be separately attached to the pressure-sensitive adhesive layer, the production costs call for simplification of the working process not only can be achieved, it has the advantage of minimizing the defect rate of products. In addition, this composite sheet of the roll-type is manufactured in the same method is applied to a trifling only small electric and electronic and communication devices, and effectively release the heat and absorb electromagnetic waves generated from the inside, which can effectively absorb external shocks have a complex function. ; radiation, electromagnetic wave absorption, the roll-type (roll type), a composite sheet, low-viscosity silicone gel, high viscosity silicone gel, Fe-Si, Fe-Cr, Fe- Ni, Fe-Al, Fe-Al-Si, Fe-Cr-Si, an electromagnetic wave absorbing powder, alumina, silica, magnesia, silicon nitride, graphite, carbon, powder for heat (thermal conductivity), flake-shaped (flake type), granular (particulate), Den'll teuhyeong (dendrite type), solvents, degassing, comma coating.