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Powdery pencil lead and preparing method thereof

A pencil lead and pulverization technology, applied in the direction of pencil lead, non-active pencil, printing, etc., can solve the problems of not being able to wipe clean, poor softness, difficult to modify, etc., to achieve good erasable effect, good color saturation, color bright effect

Inactive Publication Date: 2019-07-30
LONGKOU YIYOU STATIONERY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, ordinary colored pencils use a large amount of wax products such as microcrystalline wax for the lead core, and add 3M3 sodium carboxymethyl cellulose as a binder product. Although the hand feels smooth, the strength is too high and the softness is poor, and the wax It is sticky, cannot be wiped clean, and it is difficult to modify when painting

Method used

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  • Powdery pencil lead and preparing method thereof

Examples

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Effect test

Embodiment 1

[0024] The powdered lead core in this embodiment is mainly prepared from the following raw materials in mass percentage: 30% of clay powder, 20% of barium sulfate, 6% of kaolin, 4% of gum arabic, and 28% of pigment. Also add other raw materials necessary for producing lead cores, such as water, in the raw materials. Select kaolin to be 1600 order kaolin micropowder in the present embodiment, clay powder is the clay powder more than 800 orders, barium sulfate is the barium sulfate powder more than 1000 orders, and gum arabic is pulvis. The pulverized pencil lead produced in this example had a length of 90 mm and a diameter of 3.0 mm.

[0025] Adopt the raw material consumption of present embodiment to carry out concrete pulverization pencil lead preparation, comprise the steps:

[0026] Step 1, mixing the washed clay, barium sulfate, kaolin, gum arabic and pigment into a uniform dry powder;

[0027] Step 2, kneading the dry powder evenly mixed in step 1, sealed storage and gr...

Embodiment 2

[0035] The pulverized lead core in the present embodiment is mainly prepared from the raw materials of following mass percentage: clay powder 35%, barium sulfate 25%, kaolin 10%, gum arabic 6%, pigment 32%, produced in the present embodiment The powdered pencil lead has a length of 185mm and a diameter of 7.0mm, and the preparation process is the same as in Example 1.

Embodiment 3

[0037] The pulverized lead core in the present embodiment is mainly prepared from the raw materials of following mass percentage: clay powder 30%, barium sulfate 25%, kaolin 8%, gum arabic 5%, pigment 32%, produced in the present embodiment The powdered pencil lead has a length of 100mm and a diameter of 5mm, and the preparation process is the same as in Example 1.

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Abstract

The invention belongs to the technical field of pencil leads, and particularly relates to a powdery pencil lead and a preparing method thereof. The powdery pencil lead is mainly prepared from, by mass, 30-35% of clay powder, 20-25% of barium sulfate, 6-10% of kaolin, 4-6 % of Arabic gum and 28-32% of pigment. The preparing method includes the steps of firstly, mixing the washed clay, barium sulfate, kaolin, Arabic gum and pigment into uniform dry powder; secondly, conducting kneading, sealed storing and grinding on the evenly-mixed dry powder in the first step; thirdly, kneading and pressing alead material ground in the second step; fourthly, conducting lead drying and head cutting on the lead material pressed in the third step to obtain the powdery pencil lead. The pencil lead meets thewriting requirement, is extremely high in color saturation and good in erasable effect and has excellent performance which other graphene pencil leads and ordinary colorful pencil leads do not have.

Description

technical field [0001] The invention belongs to the technical field of pencil lead, in particular to a powdered pencil lead and a preparation method thereof. Background technique [0002] Graphite refills are made by mixing graphite and clay in a certain proportion. The hardness of the pencil refill varies with the content of the clay. The more clay, the less obvious the writing is, and the content of graphite indicates the quality of the pencil refill. For the soft condition and the obvious degree of writing, the higher the graphite content, the darker the writing and the softer the refill. However, although the writing of the graphite refill is clear, the writing is not easy to erase. [0003] A colored pencil is a drawing pencil made with colored pigments instead of graphite. These pencils are manufactured in the same way as regular pencils, i.e. pigments are mixed with a clay binder, and are available in a wide range of colours. There are two types of colored pencils, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00B43K19/18
CPCB43K19/18C09D13/00
Inventor 李杰章
Owner LONGKOU YIYOU STATIONERY IND
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