A kind of preparation method of wood-free graphite drawing pencil
A technology for graphite and painting, applied in the field of wood-free graphite drawing pencils and its preparation, can solve the problems of waste of wood resources, waste, preparation process, complicated process, etc., achieve plump and smooth ink layer, good surface corrosion resistance, and save wood Effect
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Embodiment 1
[0035] Such as figure 1 As shown, a wood-free graphite drawing pencil includes a graphite core 1, a primer layer 2 is coated on the side of the graphite core 1, and a UV paint layer 3 is also coated on the primer layer 2.
[0036] The above schemes have been able to achieve the advantages of high gloss, plump and smooth ink layer, beautiful appearance, good leveling, environmental protection, good surface corrosion resistance, not easy to drop paint, and scratch resistance. Based on the preferred solution:
[0037] The graphite core 1 is a cylinder with a length of 140-150 mm and a diameter of 7.40 mm. One end of the graphite core is a curved top 4, and the other end is a conical tip. The surface of the curved top 4 is coated with a UV paint layer. 3. The primer layer 2 is nitro paint with a thickness of 0.08mm; the thickness of the UV paint layer 3 is 0.03mm.
Embodiment 2
[0039] A method for preparing a wood-free graphite drawing pencil, comprising the steps of:
[0040] Step (A), preparing graphite core 1, specifically comprises the following steps:
[0041] (a) Press the washed clay to a water content of 50%, then dry it and micronize it into clay powder with a mesh size of 1000 or more, and then add 1500r / min mixer to stir for 6 hours to obtain a uniformly mixed dry powder;
[0042] (b) Put the uniformly mixed dry powder into a 1000L kneader, add water equivalent to 80% of the weight of the core material and knead for 10 hours, set the speed of the kneader to slow rotation 20r / min, fast rotation 60r / min, and knead After 3 hours, take it out after the water content reaches 30%, store it sealed for 30 hours, and then enter the three-roller grinder for grinding. The thickness of the core material obtained after the first grinding is 20 μm, and the thickness of the core material reaches 80 μm after continuous grinding for 10 times;
[0043](c...
Embodiment 3
[0048] A method for preparing a wood-free graphite drawing pencil, comprising the steps of:
[0049] Step (A), preparing graphite core 1, specifically comprises the following steps:
[0050] (a) Press the washed clay to a water content of 55%, then dry and micronize it into clay powder with a size of 1000 mesh or more, and then add 2000r / min mixer to stir for 6 hours to obtain a uniformly mixed dry powder;
[0051] (b) Put the uniformly mixed dry powder into a 1000L kneader, add water equivalent to 80% of the weight of the core material and knead for 12 hours, set the speed of the kneader to slow rotation 20r / min, fast rotation 60r / min, and knead After 3 hours, take it out after the water content reaches 35%, store it sealed for 30 hours, and then enter the three-roller grinder for grinding. The thickness of the core material obtained after the first grinding is 25 μm, and the thickness of the core material reaches 90 μm after continuous grinding for 10 times;
[0052] (c) ...
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