Eraser material:
1. Natural rubber
Natural rubber is a kind of rubber extracted from rubber trees. It has good elasticity and toughness and can be made into erasers of various shapes. Natural rubber has a very good erasing effect, but is more expensive.
2. Synthetic rubber
Synthetic rubber is a type of artificial rubber that is made through a chemical reaction. Synthetic rubber is slightly less elastic and tough than natural rubber, but it is cheaper.
3. Polyurethane
Polyurethane is a polymer material that has good elasticity and toughness and can be made into erasers of various shapes. Polyurethane erases very well and leaves no eraser shavings.
4. PVC
PVC is a common plastic material that can be made into various shapes of erasers. PVC has a mediocre erasing effect and tends to leave eraser chips.
5. Silica gel
Silicone is a polymer material that has good elasticity and toughness and can be made into erasers of various shapes. Silicone erases very well and leaves no eraser shavings.
How to use the eraser:
First, choose the right eraser based on the type of pencil or ink pen you're using and the texture of the paper. Generally speaking, hard erasers are suitable for paper with a harder texture, such as copy paper and drawing paper; soft erasers are suitable for paper with a softer texture, such as draft paper and homework paper.
When holding the eraser, you should pinch the sides of the eraser between your thumb and index finger and place it on your little finger to keep it stable. At the same time, avoid pointing the tip of the eraser at others or yourself to avoid accidental injury.
When wiping handwriting, the eraser should be wiped along the handwriting on the paper with moderate force. For lighter handwriting, use gentle pressure; for heavier handwriting, use slightly harder pressure. At the same time, be sure to wipe in the opposite direction to the handwriting to avoid damaging the paper.
When the eraser is worn or loses its elasticity, it needs to be replaced in time. Generally speaking, you can buy new ones from a stationery store for replacement.
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Precautions for using eraser:
Avoid putting the eraser in your mouth for biting or sucking, because some chemicals are added during the production process of the eraser, which may cause harm to human health if you put it in your mouth for biting or sucking.
Erasers should be stored in a dry, cool, ventilated place away from direct sunlight and high temperatures. Because high temperatures can cause the eraser to deform or crack, while moisture can cause the eraser to become moldy or deteriorate. At the same time, the eraser should be stored separately from sharp objects or flammable objects to prevent accidental injury or fire.
Avoid using the eraser near your eyes, as the eraser can produce some fine particles, which may cause eye discomfort or infection if used near your eyes.
When using an eraser, keep your hands clean and hygienic. Because bacteria on your hands may cause contamination of the eraser, affecting its effectiveness and service life. At the same time, if it is found that the surface of the eraser is not clean or has dirt, it should be cleaned in time.
Pay attention to the frequency and time of use, because using the eraser for a long time will wear its surface, so the frequency and time of use should be controlled. Generally speaking, each use time should not be too long. At the same time, you should pay attention to the changes in the surface of the eraser during use. If it appears to be worn or loses elasticity, you should replace it with a new one in time.
Eraser manufacturing process:
The eraser manufacturing process can be divided into the following steps: raw material preparation, mixing, molding, vulcanization, cutting, packaging, etc.
First of all, the preparation of raw materials is the first step in making erasers. The main raw materials of eraser are rubber and filler. Rubber is the main component of the eraser, which gives the eraser good wiping performance. Fillers are used to increase the hardness and strength of the eraser. Commonly used fillers include graphite, powder, calcium carbonate, etc. During the preparation of raw materials, rubber and fillers need to be mixed together in a certain proportion for subsequent molding.
Next comes the mixing process. Mixing is the complete mixing of rubber and fillers for subsequent molding. The mixing process requires the use of a mixer. Put the rubber and filler into the mixer and mix them thoroughly through mechanical movement. The mixing time and speed need to be adjusted according to different eraser formulas to ensure the uniformity and quality of mixing.
Molding is an important step in eraser manufacturing. The molding process requires the use of a mold. The mixed rubber material is placed into the mold and shaped through pressure and temperature. The temperature and pressure need to be controlled during the molding process to ensure the quality and shape of the eraser. The formed eraser needs to be vulcanized to make it have good elasticity and wear resistance.
Vulcanization is a key step in eraser manufacturing. Vulcanization is to put the shaped eraser into a vulcanization furnace for heat treatment to make it have good elasticity and wear resistance. The vulcanization time and temperature need to be adjusted according to different eraser formulas to ensure the quality and effect of vulcanization.
Cutting is to cut the vulcanized eraser into suitable size and shape. A cutting machine is required during the cutting process. Put the vulcanized eraser into the cutting machine and cut it into the appropriate size and shape through mechanical movement. The cut erasers need to be cleaned and packaged for subsequent sales and use.
The last step is the packaging process. Packaging is to put the cut erasers into packaging bags or boxes for subsequent sales and use. During the packaging process, attention must be paid to keeping the eraser clean and hygienic to ensure its quality and safety.
https://www.greenwillplus.com/The-evolution-of-the-eraser-From-rubber-to-multifunctional-artifact.html
