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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

Active Publication Date: 2015-09-23
LONGKOU YIYOU STATIONERY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation process, a large amount of wood is required and the quality of the wood is extremely high. The preparation process and procedures are complicated, and the waste is serious, which causes a great waste of wood resources. At present, other woods are being used instead, and no good results have been achieved.
[0003] At present, the research on wood-free graphite drawing pencils is limited to the direct light-curing UV paint on the graphite core. Although it has the effect of saving wood, the direct light-curing UV paint on the graphite core will not combine well with the UV paint and the graphite core. The paint falls off, the angle between the top of one end of the pencil and the side is a right angle, and the paint is easy to fall off at the right angle

Method used

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  • A kind of preparation method of wood-free graphite drawing pencil

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Experimental program
Comparison scheme
Effect test

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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Abstract

The invention discloses a woodless graphite drawing pencil and a preparation method thereof. The woodless graphite drawing pencil comprises a graphite core (1), a base coat layer (2) coats the lateral surface of the graphite core (1), a UV paint layer (3) coats the base coat layer, one end of the graphite core is an arc-shaped top (4) while the other end is a conical point, and the UV paint layer (3) coats the surface of the arc-shaped top (4). The method for preparing the woodless graphite drawing pencil includes that: (A), preparing the graphite core (1); (B) soaking the graphite core (1) in organic solvent; (C) coating the base coat, grinding the top, coating the UV paint and grinding the point to obtain the woodless graphite drawing pencil. The woodless graphite drawing pencil prepared by the preparation method has advantages of wood material conservation, low cost, high gloss, plump and flat graphite layer, beautiful shape, good leveling property, environment friendliness, good surface corrosion resistance, difficulty in paint losing and scratch resistance and can be broadly used for production.

Description

technical field [0001] The invention relates to a pencil and a preparation method thereof, in particular to a woodless graphite drawing pencil and a preparation method thereof. Background technique [0002] Ordinary graphite pencils include a graphite core and a wood layer wrapped outside. The preparation process is to mix and fire graphite and clay to form a graphite core, and then wrap the graphite core with a wood layer. In the preparation process, a large amount of wood is required and the quality of the wood is extremely high. The preparation process and procedures are complicated, and the waste is serious, which causes a great waste of wood resources. At present, other woods are being used instead, but no good results have been achieved. [0003] At present, the research on wood-free graphite drawing pencils is limited to the direct light-curing UV paint on the graphite core. Although it has the effect of saving wood, the direct light-curing UV paint on the graphite co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B43K19/02B43K19/16B43K19/18
Inventor 李杰章
Owner LONGKOU YIYOU STATIONERY IND
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