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Soft plastic pencil composition

A technology of soft plastics and pencils, which is applied in the direction of non-active pencils, printing, writing utensils, etc. It can solve the problems of insufficient softness of the lead core, poor toughness of the pen barrel, and difficulty in cutting, etc., and achieve stable product quality, improved production efficiency, and easy rolling. The effect of cutting

Inactive Publication Date: 2004-01-28
方福庆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the technical problems of the prior art that the penholder of the soft plastic pencil has poor toughness and is not easy to cut.
[0004] The invention also solves the technical problems of the existing lead cores such as insufficient softness or poor coloring

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0030] Embodiment: the method for making the soft plastic pencil of the present invention is to put the raw material of the lead core into the lead core machine after mixing according to the proportion, heat and fuse under the condition of 130-150 ℃ and extrude into lead core pellets, according to the design Requirements, generally fused 1-5 times, at the same time, mix the raw materials of the pen holder according to the ratio and put them into the pen holder machine, heat under the condition of 130-140°C, and the lead pellets extruded by the lead core machine enter the pen holder machine to wear the core Fusion forming, the pen holder can be made into various drawers such as round, regular hexagon, regular octagon or regular triangle, and then put in cold water to cool to room temperature, and the finished product from the pen holder machine can be cut according to the designed length. , a rubber tip can be installed at the end of the pen barrel.

[0031] Refer to Table 1 an...

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PUM

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Abstract

The invention provides a kind of prescription for soft plastic lead pencil. The prescription of pencil core is: graphite 45í½55%, PVC 36í½48%, stearic acid imide 3.3í½3.7%, stearate calcium 4.3í½6.2%, the prescription of the pole is: PVC 45í½60%, calcium carbonate 38í½50%, dibutyl ester 1.0í½2.2%, dieitester 0.8í½2.2%, vesicant 0.2í½0.3%. The vesicant is azo compound.

Description

technical field [0001] The invention relates to a pencil, in particular to an improvement to the existing soft pencil prescription. Background technique [0002] General pencils are made of wood, which is made of strip-shaped lead embedded in a wooden pen holder. When making it, many cutting processes are required to make the log into a round, regular hexagonal or regular octagonal pen holder. The process is quite cumbersome, the production cost is high, and a lot of high-quality wood is wasted, which is not conducive to the environmental requirements. In order to overcome the above-mentioned shortcomings of wooden pencils, soft plastic pencils are now also available. For example, someone has applied for a patent called "soft pencil and its manufacturing method" (01127186.8). Soft lead core of graphite powder and polyvinyl chloride. The manufacturing method is to mix the raw materials of the lead core into the lead core machine for heating, fusion and extrusion, and at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B43K19/16
Inventor 方福庆方波
Owner 方福庆
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