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Simple and practical evaluation of sanitary napkins
How to choose sanitary napkins in general? See the sign? A menstrual towel promoted by a treasure in the supermarket? Friend introduction?

Have you ever thought about doing a small experiment to see which menstrual towel is good?

It doesn't matter if you haven't thought about it. You read this article, which shows that you have the heart to do it. But it doesn't matter, you can have a general idea by looking at my experimental results, hahaha (? Of course, you can also do a small experiment yourself to see how it works.

So how to choose sanitary napkins?

Mainly from the water absorption, breathability and adhesion of sanitary napkins.

Water absorption: We all know that the water absorption is too small and it is easy to leak sideways. Strong water absorption, the surface of menstrual towel will not be wet, and it is not easy to breed bacteria. But is the stronger the water absorption, the better? If the water absorption is large, it is easy to breed bacteria if it is not replaced for a long time. Therefore, it is certainly more wise to choose a sanitary towel with a large water absorption than a sanitary towel with a small water absorption. But it should be changed frequently, and the use time of sanitary napkins should not exceed 4 hours.

Permeability: Women's sensitive skin is most vulnerable during menstruation. According to the survey, 73% of women will feel local itching and burning pain during menstruation. This is mostly caused by the use of airtight sanitary napkins. Therefore, the permeability of the menstrual towel is very important!

Adhesion: The most worrying thing about menstrual towels is adhesion. Sanitary napkins with strong adhesion can make girls worry-free during menstruation. However, some inferior sanitary napkins have poor adhesion, which easily leads to frequent walking or even falling off. Similarly, some sanitary napkins are too sticky and easy to bring unnecessary trouble to pants.

Let's start the experiment.

Experimental materials: ① Sophie ultra-thin for night use,

② Seven-degree ultra-thin space for night use,

(3) 1.2 yuan (I happened to see it when I was visiting RT Mart! Just 1.20 yuan, I'll buy it for the experiment. Gnome male-"let's call him 1.20 yuan bathroom. "

④ Anhui New Era Sanitary napkins

? I asked my roommate for it.

Experiment 1:

Step 1: Open the menstrual towels one by one, stick them on the table, pour four cups of black ink on the sanitary towel with the same amount of water, and observe the color of the sanitary towel. The lighter the color, the better the water absorption, which has entered the inner layer.

? Step 2: Place four paper towels on the surface of the menstrual towel and press them hard to observe the humidity of the paper. The wetter, the stronger the reverse osmosis, and the worse the water absorption effect.

Experimental results:

(It can be clearly seen that the color depth: one piece is two >; Seven dimensional space > Sophie >: An Hui)

(Paper humidity: one for two > Seven-dimensional space > Sophie >: An Hui)

Summary: From the results, the water absorption effect of a set of seven-degree space around 10 yuan is similar to that of a two-piece space! Sophie's water absorption effect is still good, and Anhui has the best water absorption effect.

Experiment 2: Open the menstrual towel and observe the internal structure.

As we can see from the picture, a piece of absorbent paper is almost made of fluff pulp (the popular waste newspaper uploaded by WeChat before), but it is not. Generally, regular manufacturers will not use waste newspapers as raw materials. . . There are two kinds of absorbent substances in menstrual towels. One is a water absorption factor, which is a chemical substance, non-toxic and harmless, and has excellent water absorption effect; The other is fluff pulp, the water absorption effect is not as good as the water absorption factor).

Sophie and Anhui have many water absorption factors, no wonder the water absorption effect is so good!

Put the contents of the menstrual towel in the same amount of water.

You can clearly see the water absorption coefficient.

Experiment 3:

Tear off the menstrual towel stuck on the table and observe the adhesion.

The other two forgot to take pictures. . . Anyway, the result is that the space of 27 degrees is difficult to tear, and it will tear when it feels hard. Sophie and Hui tear easily and come down easily.

Experiment 4: Prepare four cups of hot water, put the bottom layer of the freshly torn menstrual towel on the hot water, and then cover the empty cup to observe the air permeability.

We can see that the water mist in the transparent empty cup is one piece and two pieces at the same time.

To sum up, buying seven degrees of space is the most unwise choice, and the effect is not much better than one piece of two, not as good as Sophie and An Hui. Of these four, Anhui has the best effect!

This experiment is a little rough and simple (as can be seen from the picture, I did it casually in the dormitory), but the effect is still obvious! Interested students can also do (? )。