Formulas and preparation method of energy-saving and environment-friendly plastic pencil

Abstract

The invention discloses formulas of an energy-saving and environment-friendly plastic pencil. The formulas comprise the pencil lead formula and the lead holder formula; a pencil lead is prepared fromthe following components in parts by weight: 10-60 parts of a color developing agent, 4-30 parts of calcium stearate, 4-8 parts of SBS rubber, 4-9 parts of paraffin, 6-10 parts of a brightener, and 30-60 parts of polystyrene; and a lead holder is prepared from the following components in parts by weight: 0.5-2.5 parts of a foaming agent, 0.01-0.04 part of transparent red, 0.02-0.06 part of 2G yellow, 10-20 parts of rubber, 10-20 parts of PE, 10-20 parts of a brightener, 60-75 parts of coarse talcum powder, and 50-75 parts of foam particles. According to the formulas and preparation method of the energy-saving and environment-friendly plastic pencil, plastic of a plastic pencil preparation process can be effectively modified and toughened, lubricity is improved, and abrasion of production equipment is lowered; and production includes but is not limited to the plastic pencil of graphite, multiple colors can be drawn, a production process of injection molding is adopted, the plate sheet dadoing procedure needed for traditional graphite pencil production is abandoned, thus the production process is simplified, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of pencil manufacturing equipment, in particular to a formula for energy-saving and environment-friendly plastic pencils. Background technique [0002] Pencil is a kind of special pen class used for writing and drawing and sketching. It has a history of more than 400 years. Wherein, the pencil includes an inner lead core and an outer pen holder that wraps the lead core. The main components of pencil lead are graphite and clay. According to national standards, pencils are divided into 18 types according to the concentration of graphite. Early pencils contained lead, but the main components of the pencil core used by people are graphite and binder, which no longer contain lead and are harmless to the human body. [0003] Due to the use of graphite and clay in the current pencil lead, the following problems have arisen (1) Graphite is a non-renewable resource, and using graphite as the lead core of the main ma...

AI Technical Summary

Problems solved by technology

[0003] Due to the use of graphite and clay in the current pencil lead, the following problems have arisen (1) Graphite is a non-renewable resource, and using graphite as the lead core of the main material is not beneficial for saving resources; (2) Both graphite and clay need to be environmentally friendly. Excavation and collection on the ground will destroy the geological landscape, generate a large amount of dust, and damage the environment; (3) excavation and collection have high mechanical and labor costs, thereby increasing the cost of the pencil manufacturing industry; When preparing the pen holder, it is necessary to plan grooves on the plate for the placement of the pen core, and the preparation process is complicated

On the whole, the existing pencils have a large waste of resources and are not environmentally friendly enough

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