The Wider The Zipper Teeth, The Safer The Suitcase Is.

With a small ballpoint pen, you can open the suitcase of the suitcase without a lot of skill and a simple punch.

Recently, a video clip with a ballpoint pen to open the suitcase of the suitcase attracted many readers' attention.

Are all zippers so weak in the face of ball point pens? Is there a safer zipper? In view of the related questions raised by readers, the reporter has measured the safety of different kinds of zippers.

The results show that the wider the zipper teeth are, the closer the zipper is interlocking, the less easy to poke with the ball point pen.

Reporters learned from the investigation that there are many kinds of zippers on the market. Besides the specifications and materials, the shape of zipper teeth can be divided into two categories.

A zipper tooth presents a slender strip, and the bite part is relatively narrow; the other zipper tooth is wider, and the occlusal part is convex.

Our focus is on the chain teeth.

The reporter bought it.

Two zippers with different width and width are tested with an ordinary ballpoint pen.

The reporter grabbed two ends of the narrow toothed zipper and inserted the nib point into the zipper slot. With the snap, the zipper was poked open for a width of one centimeter wide. The zipper teeth that were originally tightly fasten were immediately separated.

Reporters then found a suitcase like zipper, repeating the above experimental steps, and the zipper was also broken by seconds.

The reporter took a wider zipper for testing. This time, the ball pen is useless.

The reporter thrust the pen point into the gap between the zipper teeth, and stabbed it vigorously. With the snap, zipper teeth were shattered by a small piece of debris, but the zipper still cling tightly.

Insiders introduce

The two rows of chain teeth are interlaced, and the teeth are closed by the chain teeth. The pverse biting force is relatively strong. But if the longitudinal force is applied, the two rows of chain teeth of the zipper can easily be shifted up and down, showing small openings.

The quality is also related to the material and width of chain teeth.

Nylon zipper raw material is soft, force most easily deformation dislocation; metal zipper raw material is relatively hard, relatively safe.

In addition, a narrow zipper can easily be opened by longitudinal force, and a wider zipper is not easy to be opened.