Method for manufacturing sheet-like heating element and sheet-like heating element manufactured by the method
According to a method for manufacturing a sheet-like heating element and a sheet-like heating element manufactured by the method of the present invention, cubics are pulverized into nanoparticles, the nanoparticle powder is mixed with carbon to become an original yarn, and the original yarn is cut to a length of between 0.2 mm and 0.8 mm and mixed into a pulp liquid to be formed into nanoparticle pulp. The sheet-like heating element forms a space where the particles can be rotated so as to allow 90% or higher far infrared radiation, and thus contributes to the health of users, entails a low defective rate since no bending occurs during the manufacturing, can be manufactured in quantity at low cost, and can be used for multiple purposes.
1. A method for manufacturing a sheet-like heating element, comprising:
pulverizing a cubic or a manmade diamond into a nanoparticle powder;
preparing an original yarn having a diameter of 0.2˜0.8 mm by mixing the nanoparticle powder with carbon;
forming a nanoparticle pulp by cutting the original yarn to a size of 0.2˜0.8 mm and mixing the cut original yarn into a pulp liquid;
printing a silver paste on an edge portion of each of two opposite upper and lower sides of the nanoparticle pulp and attaching onto the silver paste an electrode made from a copper coated with a conductive adhesive; and
hot-pressing an organic compound layer on the upper and lower sides of the nanoparticle pulp,
wherein the hot-pressing step comprises:
arranging, on a heating plate 31 , from the lower side, a previously cut and prepared release film 32 , a glass epoxy resin plate 33 , a nanoparticle pulp 1 , a glass epoxy resin plate 33 and a release film 32 and rearranging the heating plate 31 and laminating the above structure up to multiple layers;
in this state, increasing the temperature of the press up to 110˜130° C. and maintaining the state for 20 minutes;
increasing the temperature up to 160˜170° C. while pressurizing with a pressure of 30 kg and in the increased temperature state, the layers are maintained for one hour while applying a pressure of 100 kg; and
cooling the temperature to the room temperature over 30˜40 minutes,
wherein the nanoparticle pulp 1 is coated or impregnated to have a black color by selecting any of the compounds consisting of CuO, Fe 3 O 4 (Fe 3 O 4 or ferric oxide), Fe 3 P, Fe 2 MgO 4 and Fe(C 9 H 7 ) 2 .
2. A sheet-like heating element manufactured by the method of claim 1 , comprising:
a nanoparticle pulp 1 prepared in such a way that a cubic is pulverized into nanoparticles, and the nanoparticles are mixed with carbon to become an original yarn, and the original yarn is cut to a size of 0.2˜0.8 mm and is mixed into a pulp liquid; an
an organic compound layer 2 which is laminated on a surface of the nanoparticle pulp 1 .