A kind of drawing pencil without charcoal drawing core and preparation method thereof

A charcoal drawing core and charcoal technology, applied in non-moving pencils, printing, writing utensils, etc., can solve the problems of poor combination of UV paint and graphite core, complicated preparation process and process, and no good results are achieved, so as to save Wood, low cost, waste prevention effect

Active Publication Date: 2015-11-18
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 pencils is limited to direct light-curing UV paint on graphite core. Although it has the effect of saving wood, direct light-curing UV paint on graphite core will cause poor combination of UV paint and graphite core, and paint will easily fall 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 drawing pencil without charcoal drawing core and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like figure 1 Shown, a kind of drawing pencil without charcoal drawing core, comprises charcoal drawing core 1, is coated with primer layer 2 on the side of described charcoal drawing core 1, is also coated with UV paint layer on described primer layer 2 3.

[0037] The above scheme has been able to achieve the advantages of making the drawing pencil without charcoal core draw with high gloss, beautiful appearance, good leveling, environmental protection, good surface corrosion resistance, not easy to drop paint, and scratch resistance. The following is given on the basis of this scheme. Preferred solution:

[0038] The charcoal painting core 1 is a cylinder with a length of 140-150 mm and a diameter of 7.40 mm. One end of the charcoal painting core 4 is a conical tip, and the surface of the arc-shaped top 4 is coated with 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

[0040] A method for preparing a charcoal-free lead drawing pencil, comprising the steps of:

[0041] Step (A), preparing charcoal drawing core 1, specifically includes the following steps:

[0042] (a) Press the washed clay to a water content of 50%, then dry it and micronize it into a clay powder of more than 500 meshes, then press it with 600 mesh charcoal, 1600 mesh superfine talcum powder, and 800 mesh high-pigment carbon black. Add a mass ratio of 2:3:3:2 into a 1000L kneader for kneading, and knead for 8 hours to form a uniformly mixed dry powder;

[0043] (b) Put the uniformly mixed dry powder into a 1000L kneader, add water of the same quality as the uniformly mixed dry powder and knead for 24 hours, and when the core material with a water content of 30% is obtained, stop kneading and discharge the material for sealed storage Grind with a three-roller grinder after 24 hours, and grind continuously for 15 times to make the thickness of the core material reach 80 μm;

...

Embodiment 3

[0049] A method for preparing a charcoal-free lead drawing pencil, comprising the steps of:

[0050] Step (A), preparing charcoal drawing core 1, specifically includes the following steps:

[0051] (a) Press the washed clay to a water content of 55%, then dry it and micronize it into a clay powder of more than 500 meshes, then press it with 600 mesh charcoal, 1600 mesh superfine talcum powder, and 800 mesh high-pigment carbon black. The mass ratio is 2:3:3:2 and kneaded in a 1000L kneader, and kneaded for 8 hours to form a uniformly mixed dry powder;

[0052] (b) Put the uniformly mixed dry powder into a 1000L kneader, add water of the same quality as the uniformly mixed dry powder and knead for 24 hours, and when the core material with a water content of 35% is obtained, stop kneading and discharge the material for sealed storage Grind with a three-roller grinder after 24 hours, and grind 15 times continuously to make the thickness of the core material reach 100 μm;

[0053...

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PUM

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Abstract

The invention discloses a wood-free charcoal drawing core drawing pencil and a preparation method thereof. The wood-free charcoal drawing core drawing pencil comprises a charcoal drawing core (1), the side face of the charcoal drawing core (1) is coated with a base coat (2), and the base coat is coated with a UV paint layer (3). One end of the charcoal drawing core is provided with an arc-shaped top (4), the other end of the charcoal drawing core is provided with a conical sharp part, and the surface of the arc-shaped top (4) is coated with the UV paint layer (3). The method for preparing the wood-free charcoal drawing core drawing pencil comprises the steps that (A) the charcoal drawing core (1) is prepared; (B) an organic solvent is used for soaking the charcoal drawing core (1); (C) the base coat is coated, top grinding is conducted, UV paint is coated, sharp grinding is conducted, and the wood-free charcoal drawing core drawing pencil is manufactured. The wood-free charcoal drawing core drawing pencil manufactured by the preparation method has the advantages of being saving in wood, low in cost, high in gloss, plump and flat in ink layer, attractive, good in levelling property, environmentally friendly, good in surface anticorrosion performance, not prone to painting peeling off, assistant to scratch and capable of being widely applied to production.

Description

technical field [0001] The invention relates to a pencil and a preparation method thereof, in particular to a charcoal-free core drawing pencil and a preparation method thereof. Background technique [0002] Ordinary pencils include a graphite core and a wood layer wrapped outside. The preparation process is to first 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 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...

Claims

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Application Information

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