Eraser was first discovered by British scientist Priest in 1770. It is mainly made of PVC material, with the plasticizer ATBC added. ATBC, also known as acetyl tri-n-butyl citrate, is a non-toxic plasticizer with strong solubility, good oil resistance, light resistance, and mildew resistance. It is mainly used in polyvinyl chloride, cellulose resin and ethylene. Plasticizer for base resin and synthetic rubber. ATBC is currently the most economical and environmentally friendly plasticizer in the PVC plastic industry.
The manufacturing process of rubber is actually very simple. The rubber is first mixed with ground pumice, iron oxide, vegetable oil, sulfur and other substances. The mixture is heated, causing the sulfur to mix with the rubber to increase its strength and make it more durable. Then the soft, still hot raw material is fed into the stamping machine or injected into molds of various shapes. After it cools, the mold is opened, and erasers of various shapes come out
Erasers The types are as follows: 1. Combined with the pencil and located at the tail of the pencil. The advantage is that it is easy to use, but the disadvantage is that if you use it with too much force, it will easily break the surface of the paper. And when the handwriting is erased, the eraser leaves residue on the paper. Smudge the paper. 2. Brown eraser, made of soft and rough rubber. The advantage is that it can erase large areas of traces without breaking the paper. The disadvantage is that it cannot erase handwriting very effectively and accurately. 3. Soft rubber is made of a gray material and is similar to gum. The advantage is that it does not leave residue on the paper and has a longer service life than other erasers. The disadvantage is that it is not easy to remove large areas of handwriting, and if the eraser is overheated, it can easily stain or even stick to the paper. 4. Scented rubber, a volatile oil is added during the rubber manufacturing process. The advantage is that the rubber can come with a variety of good smells. The disadvantage is that if the plastic and eraser are kept together for a long time, the organic solvent emitted by the eraser can dissolve the plastic in small amounts. Different rubber types are suitable for different people.
In addition to erasing writing, the eraser can also remove footprints on car doors. With a gentle wipe, even stubborn shoe prints will disappear without a trace. It can also remove stains on the surface of leather goods such as bags and sofas without damaging the surface of the object. If you find that sparks often appear when the electrical switch is turned on, you only need to cut off the power supply, disassemble the switch, and rub the soot-black area of ??the copper sheet with an eraser a few times to eliminate the sparks.