Scientific knowledge on sanitary towel quality standards
In recent days, the issue of the quality of sanitary towels on the internet has become one of the hot spots of concern. This paper is based on the technical indicators, techniques and provisions set out in the national standard gb/t 8939-2018 " sanitary towels " , providing a brief reading of consumer concerns and clarifying some misunderstandings in a scientific and realistic manner。
National standards for sanitary towel products
National standards refer to standards endorsed and issued by the state. The development of national standards is aimed at guaranteeing the economic development and social stability of the country and protecting the health and safety of the population. National standards are classified into mandatory standards and recommendatory standards, which are issued by the relevant administrative authorities of the state council, which are responsible for project proposal, organization, drafting, consultation and technical review, with the approval or authorization of the state council, and by the organization of standardized administrative authorities of the state council。
The current national standards relating to sanitary towels are: gb 15979-2024 health requirements for the one-time use of sanitary supplies (mandatory standard), gb/t 8939-2018 health treads (recommended standard), which are essential consumer goods for women in today's society, and market regulators, consumer protection organizations and enterprises that produce and sell them as a basis for determining the quality of their products。
Note: gb 18401-2010 (appendix a) of the national code of basic safety technologies for textile products, a popular web-based initiative, clearly states that “one-time use of sanitary products” does not fall within the scope of the standard。
Physical dimensions of sanitary towel products
Sanitary tissues are generally divided into three layers: the surface layer, the absorbent layer, the leakproof bottom, with the respective functions of receiving, spreading, absorbing liquid storage (blood) and preventing leakage. The main function of other supporting components is to prevent leakage of liquid side。
In the sanitary towel product standard, the length indicator is related to the consumer's use of the scene and to the needs of day, night or menstruation。
The national standard gb/t 8939-2018 " sanitary towels (matrix) " states that the total length of the health towel deviation indicator is the total length of the product rather than the length of the product absorbs the core. At the same time, because the materials used in the production process are extended and constrictive, the standard allows for a length deviation of up to 4 per cent, which ensures both the effectiveness of the product and the control of the enterprise's production process. Beyond or below this range is determined to be an unqualified product。
Health towel product ph value
Ph, also known as the hydrogen ion concentration index or the acid alkali value, is a measure of the activity of the hydrogen ion in the solution, i. E., the measure of the solution alkali level generally. In general, the neutral ph range refers to the ph range of 6. 5-8. 5, which is moderate in the acid range。
Specific national standards have been introduced for sanitary towels, which are classified as a one-time use of sanitary items, and the standards are gb 15979, " one-time sanitary requirements " and gb/t 8939-2018 " sanitary towels " . Among these, the requirement for ph values in the gb/t 8939-2018 “health towels” is 4. 0-9. 0, an indicator that takes into account the product characteristics of the sanitary towel, the target audience, and is based on feedback on the quality of the product over the years and the views of the parties. Beyond or below this range is determined to be an unqualified product。
Material for sanitary towel products
The sanitary towels typically consist of three parts of the surface layer, the absorbent layer and the bottom layer, which are glued to thermal smelting between the layers. The surface is a component of direct contact with the skin, which is soft, the material is soft, the perforated membrane surface and the cotton surface is the two most commonly used materials; the absorbent layer consists mainly of high-molecular polymers and high-molecular polymer composites formed from cotton, non-weaving, velvet or above composites, which are used to absorb the fluid flow of blood, including the troposphere, the flow core and the chain of water, where the fluid is transient, which increases the absorption area, prevents concentrated absorption of liquids, which can be rapidly absorbed into the lower layer, and the chain is composed of wooden fibres and high-molecular resins, which are strong enough to retain liquid under certain pressure conditions; and the bottom is based on a special polyethylene (pe) plastic thin sheeting, which is made of cross-coated acrete resin, which is processed through several special aids to prevent leakage。
The national standard gb 15979-2024 health requirements for one-time use of sanitary materials and gb/t 8939-2018 health towels stipulate that waste regenerative raw materials should not be used in the production of sanitary towels and that raw materials should be non-toxic and harmless. Formal sanitary towels or qualified products do not use recycled regenerative material, and the regulatory authority will, as a matter of law, identify such products as counterfeit products。
Note: consumer inspection of the quality of materials inside the sanitary towels can generally identify most of the hypocritical products by disassembly preliminaries. Accurate qualitative testing requires the use of standard methods and instruments。
Level of formaldehyde in sanitary towel products
Formaldehyde is widespread in nature, and there may be trace amounts of formaldehyde in plants, crops and water sources, as well as in the production of raw materials and the manufacture of products, and it is difficult to guarantee the complete eradication of most consumer products. However, the regulation of formaldehyde content in sanitary towels is extremely stringent in relevant national standards to ensure the safe and healthy health of consumers. The requirement for formaldehyde content in gb/t 8939-2018 " sanitary towels " is 75 mg/kg. Beyond this value is considered an unqualified product。
Note: whether or not to exceed the standard of sanitary formaldehyde requires a professional test instrument to determine whether the consumer is unable to determine accurately by mere sensory。
Sanitary towel products and fluorescent whites
Fluorescent substances are prevalent in nature and in various flora and fauna. Fluorescent whites are a chemical with a wide range of applications, using optical colouring to make white or light objects white, bright or colourful, usually in textiles, washing products, cultural paper, coatings, plastics, etc. A number of studies on the safety of fluorescent white supplements conducted at home and abroad concluded that the proper use of fluorescent whites was free of skin sensitivity and phototoxicity, carcinogenicity and safe use。
However, in order to protect against possible health hazards, the gb/t8939-2018 " sanitary towels (matrix) " standard does not prohibit the use of fluorescent whites, but specifies that products may not contain transportable fluorescent substances. Transportable fluorescent material means fluorescent that is transferred to human skin or mucous membranes by dissolved or touched light additives, through the control of this indicator, can provide better product safety, especially for vulnerable populations. Products containing transportable fluorescent substances are deemed to be ineligible。
Note: fluorescent phenomena observed by consumers under ultraviolet lamps or fluorescent devices do not identify products as containing fluorescent whites. Specialized testing bodies are able to accurately determine the presence of transportable fluorescent substances。
Safety of sanitary towel products
The safety of sanitary towel products focuses on health indicators, in particular physico-chemical indicators (biotoxic heavy metals such as lead, arsenic, mercury) and microbiological indicators (adverse bacteria, pathogenic microorganisms, fungi, etc.)。
Health indicators for women's menstrual hygiene items are regulated and restricted by the national gb 15979-2024 health requirements for the use of one-time sanitary supplies and gb/t8939-2018 health nests (pasts). For example, in the requirements of microbiology indicators for menstrual hygiene supplies for women at the general level, the total number of bacterial bacterial species is 200 cfu/g and the total number of fungi species is 100 cfu/g. Our product national standards often require limits on these micro-organisms to be higher than those of the international developed countries。
Thus, for the majority of women who are in a normal state of health, the choice of qualified sanitary towels produced by the formal enterprise is sufficient to guarantee the health and safety of menstruation。
