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Plastic pencil

A technology for plastics and pencils, applied in non-propelled pencils, printing, writing utensils, etc., can solve the problems of large wood consumption, poisonous lead core, difficult quality control, etc., and achieve the effects of easy curling, wood saving, and fluent writing

Inactive Publication Date: 2003-11-26
汪进昌 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

General pencils are made of wood, which consumes a lot of wood, which is not conducive to environmental protection. Wooden pencils are limited by processing performance, with little change in appearance, complicated processing, high cost, difficult quality control, and poisonous lead.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: The pen holder material is calculated by 100 kilograms, the pen core material is calculated by 10 kilograms, and the wrapping material is calculated by 10 kilograms:

[0018] Pen material: 30 kg of engineering plastics (ABS), 15 kg of copolymer (SBS), 36 kg of talcum powder, 16 kg of heavy calcium titanate, 3 kg of foaming agent, white oil, and magnesium stearate; : 5.8 kg of graphite, 2.4 kg of polystyrene, 0.6 kg of engineering plastics (ABS), 0.6 kg of zinc stearate, 0.6 kg of stearic acid amide; wrapping material: 9.3 kg of engineering plastics (ABS), 0.7 kg of high-temperature pigments .

[0019] Prepare the pen holder material, pen core material, and wrapping material according to the above ratio, and mix them separately. The pen holder material is mixed twice, the pen core material is mixed 6 times, and the wrapping material is mixed once; the pen barrel material is less than 12mm. The granularity of the pen core material is less than 4mm; the shea...

Embodiment 2

[0020] Embodiment 2: The pen holder material is calculated by 100 kilograms, the pen core material is calculated by 10 kilograms, and the wrapping material is calculated by 10 kilograms:

[0021] Pen barrel material: 20 kg of engineering plastics (ABS), 15 kg of polyethylene, 50 kg of talcum powder, 10 kg of heavy calcium titanate, foaming agent, white oil, and 3 kg of magnesium stearate; pen core material: graphite 6.5 kg, 2 kg of polystyrene, 0.5 kg of engineering plastic (ABS), 0.4 kg of zinc stearate, 0.6 kg of stearic acid amide; wrapping material: 9 kg of engineering plastic (ABS), 1 kg of high-temperature pigment.

[0022] According to the above proportions, the pen barrel material, pen core material, and wrapping material are prepared, and they are mixed separately. The pen barrel material is mixed twice, the pen core material is mixed four times, and the wrapping material is mixed once; the pen barrel material is less than 12mm. The granularity of the pen core materia...

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PUM

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Abstract

The plastic pencil consists of pencil shaft, pencil lead and coating and all of the pencil shaft, the pencil lead and the coating have plastic as main material. The pencil shaft is made of ABS plastic, SBS copolymer or polyethylene, talc, heavy calcium carbonate, foaming agent, magnesium stearate and white oil. The materials for the pencil lead includes graphite, polystyrene, ABS plastic and assistant. The coating materials include ABS plastic and high grade pigment. The plastic pencil of the present invention has the same shape as common wooden shaft pencil, and is writing fluently and easy to sharpen, and has the writing easy to erase, low cost, and timber consumed.

Description

technical field [0001] The invention relates to a writing instrument, in particular to a plastic pencil. Background technique [0002] Pencil is the "first stroke" involved in life learning, and it is an indispensable school supplies in learning. Generally, pencils are made of wood, which consumes a lot of wood and is not conducive to environmental protection. Wooden pencils are limited by processing performance, with little change in appearance, complicated processing, high cost, difficult quality control, and poisonous lead. Contents of the invention [0003] The purpose of the present invention is to provide a plastic pencil with good writing performance, easy cutting and curling, and one-time molding by an extruder. [0004] The concrete technical scheme that realizes the object of the present invention is: plastic pencil, is made up of penholder, pen core, foreskin, and penholder material, pen core material, foreskin are mainly plastics, wherein: [0005] a. Pen bar...

Claims

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Application Information

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IPC IPC(8): B43K19/02B43K19/16
Inventor 汪进昌沈文华计荣昌
Owner 汪进昌
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