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English Views: 0 Author: Site Editor Publish Time: 2024-12-16 Origin: Site
In modern life, diapers have become an indispensable product in infant care and some adult care fields. With the improvement of people's living standards and the continuous improvement of health and comfort requirements, the diaper market continues to grow, and consumers' expectations for product performance are also increasing. In the complex structure of diapers, PE film occupies an extremely critical position. It is like the "guardian" of diapers and plays a decisive role in the overall performance of the product.
The thickness of PE film is a key parameter in the application of diapers. Thinner PE film can make diapers softer and lighter while ensuring basic protection, which is suitable for the delicate skin and flexible body activities of infants and young children. For example, some high-end diaper products use ultra-thin PE film, the thickness of which can be controlled within a specific range, which does not affect the leak-proof effect and makes the baby feel more comfortable when wearing it. Moreover, during the production and processing of diapers and the subsequent use process, PE film needs to maintain good dimensional stability. Whether it is in a high-temperature processing environment or in complex use conditions such as being soaked in urine and being pulled by external forces, it cannot undergo obvious dimensional deformation, otherwise it will affect the fit and leak-proof performance of the diaper.
Diapers face various mechanical challenges in daily use. The liveliness of babies and the daily walking and activities of adults will exert pulling force on diapers. The tensile strength and tear resistance of the PE film ensure that it can withstand these external forces without breaking. For example, when the baby is crawling and turning over, the PE film on the legs and waist of the diaper needs to be strong enough to adapt to the bending and stretching of the body to prevent damage due to excessive pulling, which leads to urine leakage. This balance of strength and toughness is achieved through a carefully designed material formula and production process, making the PE film soft and comfortable while having reliable mechanical properties.
Barrier property is one of the core functions of PE film in diaper applications. It needs to effectively block liquids, prevent urine from penetrating into clothing and bedding, and keep the user's body dry and the surrounding environment clean. High-quality PE film can form a tight barrier that can lock in liquids even when exposed to large amounts of urine for a long time. At the same time, it also has a certain barrier ability to gases, reducing the emission of odors, which is particularly important in public places or multi-person care environments, helping to maintain the dignity of the user and the comfort of people around them.
During the use of diapers, the PE film will continue to contact urine, possible residual detergents and other chemicals. It must have good chemical resistance to ensure that its structure and performance are not corroded by these chemicals. Urine contains a variety of components, such as urea and uric acid, which may damage some materials under long-term action. However, the PE film can exist stably in such a chemical environment, and will not undergo chemical reactions that cause the film to degrade, thin or lose its barrier properties, thereby ensuring the service life and safety of diapers.
Due to direct contact with human skin, especially the sensitive skin of babies, the hygienic safety of PE film is crucial. It must meet strict hygiene standards and be non-toxic, odorless and free of allergic substances. During the production process, it will undergo strict disinfection and purification to ensure that no harmful microorganisms or chemical residues are introduced. This strict control of hygiene and safety effectively avoids health problems such as skin allergies and infections caused by the use of diapers, and provides users with peace of mind care protection.
At the bottom of the diaper, the PE film builds a solid leak-proof line through a special laying method and precise sealing process. Usually, the PE film covers the entire bottom area and fits tightly with other material layers of the diaper. At the edge, heat sealing or ultrasonic welding and other technologies are used to seal to form a seamless connection, eliminating the possibility of urine seeping from the bottom edge. This bottom leak-proof design has undergone countless experiments and optimizations and can adapt to different usage scenarios and changes in human body posture. Whether the baby is lying flat, lying on the side or sitting, it can effectively prevent urine from leaking sideways and back, providing users with a long-term dry experience.
The leak-proof effect of the diaper leg also depends on the clever application of PE film. In the elastic waist area of the leg, the PE film works together with the elastic material. The elastic material enables the diaper to fit the leg curve tightly, while the PE film provides a reliable liquid barrier on the basis of fit. It will stretch and contract appropriately with the movement of the legs, always maintaining a good seal to prevent urine from leaking out of the leg gaps. For example, some innovatively designed diapers use three-dimensional leak-proof guards on the legs, in which the softness and fit of the PE film are fully utilized, effectively improving the leak-proof performance of the legs, so that babies do not need to worry about urine leakage when they move freely.
In order to avoid skin problems such as diaper rash caused by stuffiness and humidity inside diapers, PE membrane uses microporous technology to achieve breathability. The diameter of these micropores is precisely designed to be small enough to prevent liquid from passing through, but to allow water vapor molecules to enter and exit freely. When the baby urinates, the urine is absorbed by the absorbent layer and converted into water vapor, which is released into the outside air through the micropores on the PE membrane, thereby maintaining a dry environment inside the diaper. This microporous technology gives diapers good breathability without affecting the liquid barrier performance of the PE membrane, achieving a perfect balance between liquid barrier and gas exchange.
Breathability is directly related to the comfort of the user, especially for infants and young children who wear diapers for a long time and adults with limited mobility. In the hot summer, good breathability can discharge moisture and heat in time, keep the skin fresh, and reduce discomfort and irritability caused by stuffiness. In the cold winter, proper ventilation also helps maintain normal skin metabolism and avoid skin problems caused by excessive moisture. It can be said that the breathability of PE film is one of the key factors in improving the overall comfort of diapers. It makes diapers not only a leak-proof tool, but also a care product that can protect skin health and provide a comfortable experience.
In order to improve the comfort of PE film when it comes into contact with the skin, manufacturers have adopted a variety of surface treatment processes. For example, a soft coating is applied on the surface of the PE film to make it more delicate and smooth to the touch and reduce friction stimulation to the skin. In addition, embossing is also one of the commonly used methods. By pressing a specific texture on the surface of the film, it not only increases the softness of the film, but also improves its breathability to a certain extent. These surface treatment processes have been carefully designed and optimized to provide users with the most gentle care, especially for the delicate skin of babies, which can effectively reduce the risks of skin redness and damage caused by friction.
Babies' skin is more delicate and sensitive than adults, and they have extremely high requirements for the softness of diaper materials. The softness of PE film plays a vital role in the contact between diapers and baby skin. When the baby moves, the soft PE film can bend naturally with the movement of the body and fit the skin without causing harsh friction. This gentle care helps protect the baby's skin barrier function, reduces the impact of external stimuli on the skin, and provides strong support for the baby's healthy growth.
Blow molding process is one of the common methods for producing PE film. First, the PE raw material is put into the extruder for melting to make it a uniform melt. Then, the melt is extruded from the die head by the screw to form a tubular film blank. Next, compressed air is introduced into the film blank to make it expand outward under a certain air pressure to form the required film diameter and thickness. During the inflation process, parameters such as air pressure, extrusion speed and traction speed must be accurately controlled to ensure the uniformity of the film thickness and the stability of its physical properties. Finally, after cooling, shaping, winding and other processes, the finished PE film is obtained. The advantage of the blow molding process is that the equipment is relatively simple, the investment cost is low, and PE films of different specifications and properties can be produced, which is suitable for large-scale production.
The casting process has its own unique characteristics. In the casting process, the molten PE raw material is extruded from the flat die slit and directly cast onto the cooling roller for rapid cooling and shaping to form a film. Compared with the blow molding process, the film produced by the cast film process has a more uniform thickness, higher transparency and better surface flatness. This is because the film cools faster and has a relatively low crystallinity during the cast film process, which gives the film better optical and physical properties. However, the equipment for the cast film process is more complicated, the investment is larger, and the production efficiency is relatively low. In actual production, manufacturers will choose the appropriate production process to produce PE film based on factors such as the specific needs of the product and the production scale.
The quality of raw materials is the basic factor affecting the performance of PE film. When purchasing PE raw materials, it is necessary to strictly inspect its purity, molecular weight distribution, density and other indicators. High-purity raw materials can ensure that the PE film has good chemical stability and physical properties. Raw materials with uniform molecular weight distribution help to produce films with stable performance and uniform thickness. For example, if the raw materials contain too many impurities or the molecular weight distribution is too wide, it may cause defects such as bubbles and holes in the film during processing, or performance degradation during use, such as poor barrier properties and reduced strength. Therefore, only through strict raw material inspection can we ensure that the raw materials put into production meet the quality requirements.
In the production process of PE film, real-time monitoring is the key link to ensure product quality. Through various sensors and testing equipment installed on the production line, key parameters such as film thickness, width, tensile strength, barrier properties, etc. are monitored online. Once the parameters are found to deviate from the set standard range, the control system will immediately adjust the production process parameters, such as the temperature of the extruder, the screw speed, the traction speed, etc., to restore the production process to normal. For example, when the thickness of the film is detected to be thinning, it may be that the extrusion volume is insufficient or the pulling speed is too fast. The system will increase the extrusion volume or reduce the pulling speed accordingly to ensure that the thickness of the film meets the requirements. This real-time monitoring and adjustment mechanism can effectively avoid the production of a large number of unqualified products and improve production efficiency and product quality stability.
The inspection of finished PE film is the last line of defense for quality control. The test items cover various performance indicators of the film, including barrier test, tensile test, air permeability test, and hygiene index test. The barrier test usually uses a professional permeameter to measure the permeation rate of the film to liquid and gas to evaluate whether its leakproof and breathable performance meet the standards. The tensile test uses a tensile testing machine to measure the tensile strength, elongation at break and other mechanical performance indicators of the film to determine whether it can withstand the external force in actual use. The hygiene index test includes the detection of the number of microorganisms on the surface of the film, the residual amount of harmful substances, etc., to ensure that it meets the hygiene and safety standards. Only finished PE films that have been fully tested and all indicators are qualified can be used in the production of diapers.
In order to meet the increasingly diverse and high-end market demands, the development of high-performance composite materials has become an important direction for the development of PE films. For example, compounding nanomaterials with PE can significantly improve the barrier properties of the membrane. Nanoparticles can fill the gaps between PE molecules to form a denser structure, effectively blocking the penetration of liquids and gases. At the same time, the composite of some biodegradable materials and PE has also received widespread attention. On the premise of ensuring the basic performance of diapers, this composite material can gradually degrade under certain environmental conditions, reducing environmental pollution, and is in line with the concept of sustainable development. Through continuous exploration and innovation in the formulation and preparation process of composite materials, it is expected to develop PE film materials with better performance and bring new breakthroughs to the diaper industry.
Intelligent responsive PE membrane is one of the current research hotspots in the field of materials science. The membrane automatically changes performance based on environmental factors or changes in the amount of urine inside the diaper. For example, when the amount of urine increases, the breathability of the membrane will increase accordingly, accelerating the discharge of water vapor and keeping the interior dry; when the ambient humidity is high, the barrier properties of the membrane will increase to prevent external moisture from entering. This intelligent response function is achieved by adding special functional materials or building special microstructures in the PE film. Although the smart responsive PE film is still in the research and experimental stage, once successfully applied, it will greatly improve the intelligence level and user experience of diapers, and promote the development of the diaper industry in a more high-end and intelligent direction.
With the continuous enhancement of global environmental awareness, degradable materials are being used more and more widely in various fields. In the diaper industry, the research and development and application of degradable PE film have great potential. Degradable PE film can gradually decompose into harmless small molecules in the natural environment through the action of microorganisms or photodegradation, thereby reducing the pollution of soil and water bodies. However, degradable PE film currently faces some technical challenges, such as the control of degradation rate and the stability of performance during the degradation process. However, with the continuous increase in scientific research investment and the continuous advancement of technology, it is believed that degradable PE film will gradually overcome these problems and become one of the mainstream choices in the future diaper market, providing an effective solution to the environmental problems caused by diaper waste.
In addition to the application of degradable materials, the recycling of PE film after diapers are used is also an important way to achieve environmental protection and sustainable development. At present, some enterprises and research institutions are exploring effective recycling methods, such as separating the PE film from other materials in used diapers through special separation technology, and then cleaning and regenerating them so that they can be reused in the production of other plastic products or PE film products. Although the recycling industry chain is not perfect, with the maturity of technology and the support of policies, it is expected to establish an efficient and environmentally friendly recycling system to maximize the utilization of resources, reduce dependence on original resources, and promote the green development of the diaper industry.
In summary, PE film has irreplaceable and important application value in diapers. Its unique physical and chemical properties provide excellent performance guarantee for diapers in terms of leakproofness, breathability, soft touch, etc. Through rigorous production processes and strict quality control, it is ensured that PE film can stably perform these functions and meet consumers' demand for high-quality diapers. Looking to the future, with the continuous advancement of new material research and development and the in-depth implementation of environmental protection concepts, PE film will continue to innovate and develop in the field of diapers. The application of high-performance composite materials and intelligent responsive materials is expected to enhance the intelligence and high-end level of products, and the trend of environmental protection and sustainable development will promote the continuous improvement of degradable PE film and recycling technology. These developments will not only bring better user experience to consumers, but also lay a solid foundation for the sustainable development of the entire diaper industry, so that diapers can better coexist with the environment while meeting human care needs. If you need PE film for baby diapers, Lonsun is your best choice.
