A woodless pencil refers to a pencil that has the function of using a pencil without using wood. Generally speaking, it refers to a pencil with a whole lead core, the surface of which is coated with paint or film, and it can be written by hand, because it is more environmentally friendly and energy-saving without wood.
Woodless pencils can be divided into graphite woodless pencils, colored woodless pencils, water-soluble woodless pencils and carbonized woodless pencils. At present, the earliest R&D production in China is Longkou Yiyou Stationery Co., Ltd., an enterprise in Longkou City, Shandong Province, which has a number of patents for the invention of wood products.
Expansion: Is the woodless pencil easy to use?
The invention mainly solves the problem that a large amount of forest resources are consumed by wooden pencils, and solves the problem of pencil board resources at present. It uses organic polymer materials to make the shell. The selected new materials are non-toxic, and the residual products and leftovers in the production process can be recycled. At the same time, the whole production process is smokeless, tasteless and does not produce any pollution, so it is a green product.
The production of plastic woodless pencils only needs one process, and the production speed is fast. The most valuable thing is that the all-plastic woodless pencil bid farewell to wood, which reasonably and effectively protects the country's forest resources. The required materials come from waste foam, agricultural film, beverage bottles, plastic lunch boxes, etc. These "white pollution" turn waste into treasure, and the production cost is extremely low.
The main differences between woodless pencils and wooden pencils are curl, smoothness and coloring. The key for a woodless pencil to reach all the indexes of a woodless pencil is to understand the difference between plastic and wood. The key of the all-plastic woodless pencil is to pay attention to how to foam the all-plastic pencil lead, and then put the foamed two materials into the extruder to harden the refill through the cold water treatment system. The most important technology is the rational use of foaming lubricant.
Does this pencil contain lead?
Pencils do not contain lead. Pencils are made of graphite, clay refills and wooden pens. In ancient Rome, most pencils used by people were lead bars. Later, it was found that graphite was darker than lead and easier to write, gradually replacing lead. Moreover, lead is a heavy metal material, which has certain toxicity and is harmful to human body.
Is mechanical pencil with a low center of gravity easy to use?
Mechanical pencil with low center of gravity is mechanical pencil whose writing center of gravity is at the writing point. This design can make users write more easily, the lead is not easy to break, and it is conducive to stable writing, which is very suitable for professional designers and artists.
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