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Preparing method of environment-friendly pencil

An environment-friendly, pencil-based technology, applied to non-propelled pencils, printing, writing utensils, etc., can solve the problems of ecological environment damage, wood production reduction, etc., and achieve the effect of reducing losses, reducing consumption, and improving market development prospects

Inactive Publication Date: 2013-04-10
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a large amount of export has exchanged a lot of foreign exchange for the country, it has also paid a huge price for it. Due to long-term over-harvesting of high-quality basswood used to produce pencils, not only the ecological environment has been severely damaged, but the timber output has also decreased. decrease year by year

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0007] Example 1: VCM resin 58%, p-methyl diacetate 10%, binder 5%, graphite 25%, talcum powder 1.8%, tallow 0.02%, pigment 0.18%. Mix them evenly and inject them into a plastic pencil board similar to a wooden pencil board. The lead core in the groove plate in the middle of the two boards is pressed and welded together by a high-frequency heat sealing machine or an induction heat sealing machine.

example 2

[0008] Example 2: VCM resin 60%, p-methyl diacetate 13%, binder 5%, graphite 20%, talcum powder 1.8%, tallow 0.02%, pigment 0.18%. Mix them evenly and inject them into a plastic pencil board similar to a wooden pencil board. The lead core in the groove plate in the middle of the two boards is pressed and welded together by a high-frequency heat sealing machine or an induction heat sealing machine.

example 3

[0009] Example 3: VCM resin 56%, p-methyl diacetate 14%, binder 3%, graphite 25%, talcum powder 1.8%, tallow 0.02%, pigment 0.18%. Mix them evenly and inject them into a plastic pencil board similar to a wooden pencil board. The lead core in the groove plate in the middle of the two boards is pressed and welded together by a high-frequency heat sealing machine or an induction heat sealing machine.

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PUM

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Abstract

The invention discloses a preparing method of an environment-friendly pencil. The environment-friendly pencil comprises the following components in percentage by mass: 50% to 68% of VCM (vinyl chloride monomer) resin, 10% to 20% of p-methyl diacetate, 2% to 6% of bonding agent, 20% to 30% of graphite, 1% to 2% of talc powder, 0.02% to 0.2% of tallow, and 0.02% to 0.2% of pigments. The preparing method of the environment-friendly pencil has the advantage that pencil boards similar to woods are prepared by an injection molding process, a lead refill is arranged between the two pencil boards, and the lead refill and the two pencil boards are pressed and welded by a thermal press. The environment-friendly pencil has the advantages that the waste on woods is avoided, and the use performance is the same as the use performance of a traditional wood stick pencil.

Description

technical field [0001] The invention relates to the field of pencil manufacture, in particular to an environment-friendly pencil preparation method. Background technique [0002] Traditional wooden pencils have a history of more than 300 years, and the current consumption in the world reaches more than 10 billion. my country's annual output of pencils is about 7 billion, accounting for two-thirds of the world's total output. It is the world's largest producer of pencils and is exported to many countries. Although a large amount of export has exchanged a lot of foreign exchange for the country, it has also paid a huge price. Due to long-term over-harvesting of high-quality basswood used to produce pencils, not only the ecological environment has been severely damaged, but the timber output has also decreased. decrease year by year. With the implementation of the national natural forest protection project, the timber plan has been lowered, and the originally rare and preciou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K19/16
Inventor 陈毅忠
Owner CHANGZHOU UNIV