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Technical formula of rubber plastic wood-like pencil and manufacturing process therefor

A craft formula and imitation wood technology, applied in pencil lead, application, household utensils, etc., can solve the problems of insufficient lead concentration, difficulty in cutting, poor toughness of pen holder, etc., and achieve the effect of good concentration of lead lead and easy cutting

Inactive Publication Date: 2008-06-18
方波
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention mainly solves the technical problems of the prior art such as poor toughness of the pen holder, difficulty in cutting, and insufficient lead concentration; it provides a rubber-plastic imitation pen with the characteristics of reasonable design, good toughness, high lead concentration, and easy cutting. Process formula and manufacturing process of wooden pencil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] According to the formula of example 1 in table 1, table 2, table 3, prepare pencil according to the following method:

[0055] Mix the raw materials of the lead core in proportion and put them into the lead core machine, heat and fuse at 130-200°C for one to six times, then extrude them into lead core particles, and put the raw materials of the pen holder into the pen holder machine according to the ratio In the process, heat under the condition of 150-220°C, put the raw materials for coating into the coating machine according to the ratio, and heat under the condition of 130-180°C; put the lead core machine, pen holder machine, coating machine The extruded particles are fused and formed after passing through the combined die head.

[0056] The specific process and parameters of each stage are:

[0057] 1) Mix the raw materials of the lead core according to the ratio and put them into the lead core material making machine for fusion. The temperature of each section of ...

Embodiment 2

[0066] According to the formula preparation pencil of example 2 in table 1, table 2, table 3, preparation method is identical with embodiment 1.

Embodiment 3

[0068] According to the formula preparation pencil of example 3 in table 1, table 2, table 3, preparation method is identical with embodiment 1.

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Abstract

The invention relates to a pencil, in particular to a technical formula and a preparation method of a rubber plastic wood-like pencil thereof. The invention mainly provides the technical formula and the preparation method of the rubber plastic wood-like pencil which has the characteristics of reasonable design, good toughness, high lead core concentration, easy cutting, etc. The formula of the invention is mainly that: the pencil core is made from the components with the following weight ratio of 10 to 40 percent of polystyrene, 4 to 20 percent of sbr, 50 to 80 percent of graphite powder, 0.5 to 2 percent of ammonium stearate and 0.4 to 3 percent of calcium stearate; the penholder is made from the components with the following weight ratio of 5 to 50 percent of polystyrene, 10 to 70 percent of sbr, 20 to 65 percent of talc, 0.1 to 3 percent of foaming agent, 0.3 to 10 percent of white oil and 0.02 to 0.2 percent of antioxidant.

Description

technical field [0001] The invention relates to a pencil, in particular to a technical formula and a manufacturing process of a rubber-plastic imitation wood pencil. Background technique [0002] General pencils are made of wood, and are made of strip lead embedded in a wooden barrel. During the production, many cutting processes are required to make the round wood into a round, regular hexagonal or regular octagonal penholder. This process is quite cumbersome, the production cost is high, and a lot of high-quality wood is wasted, which is not conducive to the current Environmental requirements. In order to overcome the above-mentioned disadvantages of wooden pencils, plastic pencils are now also available. [0003] At present, there are similar plastic pencils in China, such as a "plastic wood pencil and its manufacturing process" with a domestic patent number of 01113121.7. Its components are roughly: raw materials include polyethylene, polypropylene, and talcum powder. ...

Claims

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Application Information

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IPC IPC(8): C09D13/00C08L25/06C08L53/02
Inventor 方波方福庆
Owner 方波
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