Who would have thought that the production process of the familiar familiar string was complicated and such a feat

A familiar string, items that we still use every day to tie and pack goods. Its presence is considered by everyone to be obvious, but most people don't know how the string is produced.

Try thinking and making inferences before watching the video of the rubber band production process below. Surely you will be 'stunned' about its complexity and feats.

The rubber, after being softened with heat and kneaded into a pile like kneading dough, will be put into a rolling machine to form thin rubber slices. The workers will cut and bundle the rubber into bundles and put it in a roll together with sulfur and some chemicals to make the rubber stronger and more supple.

Then, the rubber is very thin and rolled into small bundles to fit into the mold making machine. Each rubber roll is dyed and formed into very long, hollow rubber tubes. After being cooled with water, the rubber tube is inserted into an aluminum mold with a radius of a regular rubber band and then steamed at high temperature.

After the steaming process is finished, the rubber is taken away 'washed and dried' and then put into the cutter to create rubber bands with uniform cross section.

For 1 hour, the machine cut half a million rubber bands.

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