Technical Articles
Knowledge of Sanitary Napkins (Part Three)
Posted: 01/29/2018 01:56:48  Hits: 4
Structures of sanitary napkins include the surface layer, the absorbent core and the bottom layer, and the hot melt adhesive is used for pasting different layers. The surface layer is the part which is in direct contact with the skin, and the material of the surface layer is soft. The texture and the indentation of the surface layer can affect the reverse permeation of the sanitary napkin.

The PE perforated surface and the cotton surface are the most commonly used for sanitary napkins. The PE surface coupled with micropores makes the menstrual blood not flow back and the user feel dry. However, the PE material is relatively hard, and some of users are allergic to the PE material. The market share of sanitary napkins with cotton surfaces is gradually higher than that of sanitary napkins with PE surfaces after 2001 due to improvement of cotton absorbency and the appearance of perforated and composite materials. Inner parts of the sanitary napkin are cotton, non-woven, paper pulp or high polymer and high polymer composite paper made of these materials so as to absorb the menstrual blood. The side design is mainly used for preventing side leakages. The sanitary napkin will be at a certain angle when it is used, which makes the sanitary napkin easily rub against groins. Therefore, sanitary napkins adopting soft materials are more popular with women. The back of the sanitary napkin is impervious to water, which can keep the menstrual blood in the sanitary napkin. Sanitary napkins with adhesive backs are developed to stick the sanitary napkin to the underwear in the 1970s to 1980s.

Selection of sanitary napkins
Sensitive parts of the skin are most vulnerable when women are having periods. Surveys show that 73% of women feel itchy and painful on the partial skin during menstruation, which is caused by using airtight sanitary napkins. Therefore, choosing the right sanitary napkin is very important for women to feel comfortable during the period. Sanitary napkins consist of surface layers, absorbent cores and bottom layers. Therefore, we need to take materials of these three layers into account.

First, the sanitary napkin with dry mesh surfaces and funnel designs should be selected. Sanitary napkins with dry mesh surfaces can prevent partial skins from wetness. Sanitary napkins with funnel designs are better than sanitary napkins without funnel designs, because the penetrated blood will not easily flow back.

Second, the middle layer with the breathable and high-performance gel layer is better. Sanitary napkins with high-performance gel layers can coagulate the penetrated blood. The menstrual blood will not flow back after being pressed, and you won't feel that the surface of the sanitary napkin is sticky. 

Third, the bottom layer made of a breathable material can successfully make gasiform hydrone smoothly pass the sanitary napkin so as to obtain the function of timely discharging moisture, effectively reducing wetness and hotness between the sanitary napkin and the skin and keeping the skin dry.
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