Guangdong Huaping Hygiene Material Industrial Co.,Ltd. main products include PE cast film,PE breathable film,PE perforated film,Multicolor printed film,Nonwoven Laminated film,Anti-counterfeiting Holographic film etc .PE Film, that is, polyethylene film, refers to a film produced with PE particles. PE film has moisture resistance and low moisture permeability.Faced with the material list of diapers, some mothers complained that we could not understand them, how could we choose good diapers? So today we will learn about the breathable membranes that are widely used in diapers and sanitary napkins. What is so special about them?
Breathable film is an environmentally friendly functional material that is breathable (steam) and water-proof (liquid, bacteria, dust). The emergence of microporous breathable membrane has a history of more than 20 years, and it has developed rapidly in the past 10 years. China is at the initial stage in terms of technology, market and application.
Polyolefin breathable film is made by adding inert filler into PE or PP carrier, making film and stretching. For personal hygiene care products, breathable membrane is an upgraded product of ordinary water-proof membrane. The breathable membrane and the ordinary membrane cannot be simply replaced. Whether the breathable membrane is breathable or not, in addition to its own material, the craftsmanship is also very important!
The principle of the breathable membrane is very simple: inorganic matter + stretching = micropores. In fact, the operation is very particular. Only micropores with appropriate size and uniform distribution are effective. Understretched and too small pore size, understretched and no pore size, poorly stretched and undersized pores are just waste.
When the water vapor concentration on one side of the membrane is greater than the environment on the other side of the membrane, a humidity gradient pressure difference is formed. This provides the basic conditions for gas (steam) body convection. Due to the formation of convection, the humidity environment on both sides of the film tends to be relatively balanced. This is the basic principle of the breathable film. The breathable membrane is firstly used as a water-proof material. The safety of the breathable membrane, that is, the water-proof property is the premise. Only under the premise of ensuring safety can we talk about breathability. Diapers and sanitary napkins have the following characteristics: wide (relatively large), thin (pursuing close fitting and comfortable), and bag (long use time and relatively closed). From a health point of view, it is very necessary to use breathable membrane materials for such structural care products.
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