Why do rulers and erasers stick together? How do you remove things from a ruler?

The reason why the ruler and eraser stick together are:

Most of the main raw materials for rubber production are soft PVC, that is, polyvinyl chloride, polyvinyl chloride and a large number of plastic products have good compatibility, and it is easy to combine into a mixture that accommodates each other to form a homogeneous material, while most of the rulers circulating on the market are made of plastic.

In the process of rubber manufacturing, hard plastic is not suitable for eraser, so the producer adds a "plastic" to the plastic to make the eraser, because the material composition of materials such as polyvinyl chloride and frosted plastic is very similar, when they come into contact, the plasticizer spreads from the rubber to the plastic ruler, and the two will gradually stick together.

Therefore, we will often see the phenomenon of ruler and eraser sticking together in the stationery box.

The ruler and eraser will stick together, and the eraser can be removed by rinsing it with clean water and brushing it with a small brush.

The eraser and ruler stick together because the eraser and ruler are both made of polymer materials, which have similar properties and are easily soluble and stick together.

In addition, the eraser contains a small amount of plasticizer, which can weaken the interaction between the molecular chains in the polymer, make it easier for the molecular chains to slip between them, and have a certain dissolving effect on the polymer, and promote the solubility of the rubber and the ruler.

The process of making erasers

1. The petroleum processing plant transports the powder or liquid synthetic rubber to the rubber manufacturing plant. If natural rubber is to be used, it is a sturdy chunk that must be crushed and dissolved by the workers first.

2. Mix the rubber with ground pumice powder (which can make the rubber slightly coarser and harder), iron oxide (which can make the rubber pink), vegetable oil, sulfur and other substances.

3. Heat the mixture to cause the sulfur to mix with the rubber to increase the strength of the rubber and make it more durable.

4. The soft, still hot raw material is fed into the stamping machine (squeezed into a die) to make a long and thin rubber stick. Use a knife to cut the rubber stick into small pieces, wait for it to cool, and then transport it to the pencil factory to make an eraser on the pencil.

5. The block eraser used alone is made by injecting the heated rubber mixture into molds of various shapes. Wait until it cools, open the mold, and the erasers of various shapes come out.

The reason why the eraser sticks to the ruler is mainly because of the material of the two. The main raw material of the rubber is soft PVC, that is, polyvinyl chloride, and plasticizer is added to it, generally the compatibility of polyvinyl chloride and plastic products is very good, when the two are in contact, the plasticizer will spread to the plastic ruler, resulting in gradual sticking together.

Eraser and ruler glued together for the reason

When we go to school, erasers and ruler stationery are essential, sometimes idle and bored to put erasers and rulers together, you will find that they are glued together, and they are also very firm, will not fall off easily, so why do erasers and rulers get together?

The main raw material for making eraser is soft PVC, that is, polyvinyl chloride, which has a certain compatibility with many plastic products, and the combination of the two can also produce a mixture that accommodates each other, and the plasticizer will be added when making the eraser, which makes it easier to stick together with plastic products.

In addition, the composition of materials such as polyvinyl chloride and frosted plastic is very similar, when the two are in contact, the plasticizer spreads from the rubber to the plastic ruler, and the two will gradually stick together, and after they are separated, there will be more ugly marks on the ruler, as if dissolved. To prevent this, it is advisable to separate the eraser from the ruler, or to buy a steel ruler.

Ways to remove marks from a ruler:

First: First of all, put the ruler in the water with a certain temperature, the temperature is suitable, the temperature should not be too high, otherwise the ruler will be deformed.

Second: then take it out and wipe it with alcohol, at this time it is good to wipe it off, if there is no alcohol with wine, you can also use wine.

1. Carefully remove the eraser from the ruler. If you can't pull it out, you can use a pencil sharpener to slowly cut the eraser off.

2. There will be some eraser marks left on the ruler, which can be erased with an eraser first, and then put it in water to rinse after wiping. When rinsing, use a small brush and add some laundry detergent or soap. Nails can be used appropriately.

3. Finally, remember to put the eraser and ruler separately when putting stationery in the future. Or put the eraser in a small box and then put it in the stationery box.

The imprint of the eraser glued to the ruler is clear method:

1. Wipe the ruler several times with an eraser, or wipe it with soap and toothpaste.

2. Wipe with alcohol, if there is no alcohol, you can also remove the traces with wine.

3. Carefully remove the eraser from the ruler.

4. If you can't pull it out, you can use a pencil knife to cut it along the lower edge of the eraser, and you must not cut it to the ruler.

5. With the help of fingernails, slowly remove the rubber marks left on the ruler.

Step 1: Prepare a smaller airtight bag (plastic wrap can be used if not).

Step 2: Place the rubber in a sealed bag.

Step 3: With the protection of the sealed bag, the rubber will not be denatured due to climate, temperature and other reasons, and the sealed bag plays an isolation role, so that the ruler and the rubber will not be in direct contact, and they will not stick together.

Step 4: Pull out the eraser when using, and it can also keep the eraser from being contaminated.