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Formula and preparation method of color plastic pencil refill

A technology for pencil refills and colored plastics, applied in pencil refills, household appliances, applications, etc., can solve the problems of insufficient rigidity and high hardness of colored refills, achieve high decolorization power, improve mechanical and electrical properties, and increase durability hot effect

Inactive Publication Date: 2018-10-16
安徽得亿文教用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a color plastic pencil core formula and preparation method, by rationally matching the proportion of PP plastic and PE plastic in the raw materials in the production and preparation process of the pencil core, it solves the problem of excessive hardness and rigidity of the existing colored pencil core. Insufficient problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A colored plastic pencil refill formula comprises the following components in weight percent: 22% of PP plastic, 6% of PE plastic, 10% of auxiliary agent, 8% of titanium dioxide, 40% of talcum powder and 14% of pigment.

[0026] Preferably, the auxiliary agent includes a dispersant, and the dispersant is calcium stearate.

[0027] Preferably, adjuvants also include lubricants, lubricant adjuvants and surfactants.

[0028] Preferably, the surfactant is a silane coupling agent.

[0029] Preferably, the talcum powder is selected as 1250 mesh fine talcum powder.

[0030] A preparation method for a colored plastic pencil lead, comprising the following processes:

[0031] Step 1. Add talcum powder, PP plastic, PE plastic and pigments into the mixer bin, heat and stir to raise the temperature to 100°C, add titanium dioxide and additives to the mixer bin, continue heating and stirring to raise the temperature to 150-170°C, and keep the temperature constant for 30 minutes ; ...

Embodiment 2

[0037] A colored plastic pencil refill formula comprises the following components by weight percentage: 30% of PP plastic, 5% of PE plastic, 10% of auxiliary agent, 5% of titanium dioxide, 40% of talcum powder and 10% of pigment.

[0038] Preferably, the auxiliary agent includes a dispersant, and the dispersant is calcium stearate.

[0039] Preferably, the auxiliary agent also includes a lubricant, a lubricant auxiliary agent and a surfactant; the weight ratio of the lubricant, lubricant auxiliary agent and surfactant is 5:3:5.

[0040] Preferably, the surfactant is a silane coupling agent.

[0041] Preferably, the talcum powder is selected as 1250 mesh fine talcum powder.

[0042] A preparation method for a colored plastic pencil lead, comprising the following processes:

[0043] Step 1. Add talcum powder, PP plastic, PE plastic and pigments into the mixer bin, heat and stir to raise the temperature to 100°C, add titanium dioxide and additives to the banbury bin, continue h...

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Abstract

The invention discloses a formula and a preparation method of a color plastic pencil refill, and relates to the technical field of pencil manufacturing. The formula of the pencil refill comprises thefollowing components in percentage by weight: 10 to 30 percent of PP plastic, 1 to 10 percent of PE plastic, 5 to 15 percent of aids, 5 to 10 percent of titanium dioxide, 30 to 60 percent of talcum powder and 10 to 20 percent of pigment. The preparation method comprises the following steps: step one, adding all raw materials into a banbury bin and continuously heating, stirring and carrying out banbury mixing; step two, cooling and granulating a banbury mixture obtained in the step one; step three, cooling refill particles obtained in the step two; step four, transferring the cooled refill particles obtained in the step three into core extrusion equipment and extruding out the color pencil lead through the core extrusion equipment. According to the preparation method disclosed by the invention, the problems of excessively-high hardness and insufficient rigidity of an existing color pencil refill are solved by reasonably matching the PP plastic and the PE plastic in the raw materials according to the proportions during the preparation of the pencil refill.

Description

technical field [0001] The invention belongs to the technical field of pencil manufacture, and in particular relates to a formula for a colored plastic pencil lead and a preparation method for a colored plastic pencil lead. Background technique [0002] Pencil is a very widely used tool for writing and painting. Its main structure is formed by embedding a strip of lead in the pen holder; the existing colored pen cores are generally prepared by kneading clay and pigments. When making pen cores, Must go through many preparation procedures, the process is quite complicated and the production cost is very high. In the sense of environmental protection, plastic pencils have an advantage. However, in terms of performance, both the smoothness of the lead core and the dispersibility of the pigment are greatly reduced compared to wooden pencils. The existing plastic pencils have high writing damping, the writing pigment is easy to form blocks, and the pen barrel is easy to break. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D13/00
CPCC09D13/00
Inventor 穆俊礼
Owner 安徽得亿文教用品有限公司
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