keke:"pupu, look, your ruler and my eraser are stuck together. Ha ha ha!"

pupu:"Ah? Page on my ruler is printed on your eraser. You have to compensate me!"

keke:"It's not my fault. I don't know why they stick together"

I believe the students have also encountered the same situation as keke. I even heard that some students put plastic pens and erasers together, and the pen holder was "bitten" out of a hole by the eraser!

After I heard that there was such a strange event, of course, I read the materials day and night. This is not true! The real murderer has been found!

Reason 1 (material reason):

The rubber commonly used by students is made of soft PVC or SBS, which contains a large proportion of plasticizer. The ruler is made of plastic, so there is a good physical compatibility between the two. When the ruler and the rubber are put together for a long time, the rubber and the ruler will gradually stick together.

Reason 2 (additive reason):

Students like to use a scented eraser, which is a volatile oil and has good physical compatibility with a ruler! When placed together for a long time, it will also lead to the gradual adhesion of rubber and ruler.

In a word, it is recommended that you buy an iron ruler or an eraser in the pencil case, or don't put it with the ruler!

keke:"See, you said you don't blame me ~ who cares about your page

pupu:"Hum! I don't care. Who told you to put the ruler and eraser together? You have to compensate me!"

keke:"It's a big deal. I'll treat you to spicy strips"

(WeChat official account of "广东科普科技有限公司"， to bring you more interesting information about stationery.)

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