The current sanitary napkin product standard CB/T 8939- -2008 and sanitary standard CB159792002 have clear regulations on the technical indicators and sanitary indicators of the product. For a qualified sanitary napkin, its technical and sanitary indicators must meet the following requirements.
The technical indicators of sanitary napkins wholesale mainly include full length, full width, deviation of strip quality, water absorption multiple, penetration amount, PH value, adhesive strength of sanitary napkin glue and so on.
The length, width, and strip quality deviations of sanitary napkins bulk are mainly related to the accuracy of the equipment. Under normal circumstances, the deviation of the full length and width of the sanitary napkin can be controlled within 0.5%, and the deviation of the sanitary napkin strip quality can be controlled within 5%, which is much higher than the standard requirements.
The water absorption rate reflects the absorption capacity of the product, such as negative ion core pads, and is mainly related to the core material of the product. In order to improve the water absorption rate of the product, it is usually necessary to add an appropriate amount of polymer absorbent resin (SAP) to the absorbent core of the soft sanitary napkins.
SAP is a typical functional polymer material, it can absorb hundreds or even thousands of times its own weight of water, and has a strong water retention capacity.
Therefore, adding SAP to sanitary napkins can not only increase the water absorption rate of the product, but also improve the dryness of the product during use.
Permeability reflects the instantaneous absorption capacity of sanitary napkins and can be used to measure the absorption rate of the napkin for heavy flow product. The permeability is mainly related to the surface material of the product.
In order to increase the absorption speed of the product, a material with hydrophilic properties such as hydrophilic non-woven fabric should be selected as the surface material of the sanitary napkin.
For perforated membrane face materials with poor hydrophilic properties, hydrophilic hot-air non-woven fabric can be added as a diversion layer under the perforated membrane to improve its permeability.
Too high or low pH will cause skin irritation. Since sanitary napkins are products made from a variety of materials that are pressed and cut by special machinery, their pH value is related to their constituent materials. In the production design, a material whose pH value meets the requirements must be selected.
The adhesive strength of sanitary napkin glue must be moderate. The adhesive strength of the glue is too high, and the sanitary napkin is not easy to peel off from the underwear during use, and it may even cause damage to the clothes.
If the adhesive strength of the glue is too low, the sanitary napkin will not stick firmly, even shift or fall off. In order to obtain a good adhesive effect, the design of the adhesive strength of the adhesive should use thin strips of adhesive as much as possible to obtain a larger adhesive and a lower consumption of adhesive.
In addition to having good hygiene, safety, comfort and concealment, an ideal sanitary napkin must also fully consider meeting the user's external and internal needs, and has good production feasibility and reasonable cost composition.
Therefore, in the design of sanitary napkins, it is necessary to consider more details according to specific sanitary napkin performance and production conditions to design a satisfactory product.