spunbond nonwoven fabric

The production process of spunbond nonwoven fabric for diapers involves several key steps, starting from raw materials (typically polypropylene) and ending with a fabric that is soft, durable, and highly absorbent. Below is a breakdown of the main stages involved in the spunbond process for diapers:   1. Raw Material Preparation Polypropylene Resin: The primary raw material for spunbond nonwoven fabric roll is polypropylene (PP) resin, which is a thermoplastic polymer. The resin typically comes in pellet form and is melted before being spun into fibers.   2. Extrusion Melt Extrusion: The polypropylene pellets are fed into an extruder, where they are heated to their melting point (around 220–250°C). The molten polypropylene is then forced through a spinneret—a device with multiple small holes that shape the melt into fine filaments or fibers. 3. Spinning Spunbond Process: The molten polypropylene is extruded through the spinneret to form continuous filaments. These filaments are cooled by air or water sprays as they exit the spinneret. Formation of Fibers: The cooling process solidifies the molten polymer into fine fibers. The filaments are stretched using air jets to increase their alignment and improve the mechanical properties of the fabric.   4. Fiber Orientation and Bonding Fiber Laydown: The filaments are deposited onto a moving conveyor belt, forming a web of randomly oriented fibers. This is usually done using an air-laying or carding technique, where air is used to scatter the fibers evenly on the belt. Bonding (Thermal or Mechanical): After the fiber web is formed, it undergoes bonding to enhance its strength and integrity. There are two main types of bonding used: Thermal Bonding: The fiber web is passed through heated rollers, which melt the fibers at certain points, creating a bond between them. This method provides a soft, flexible fabric. Needle Punching (Optional): In some cases, mechanical bonding is used, where needles punch through the fiber web to interlace the fibers, making them stronger and more compact. 5. Fabric Consolidation The bonded web is then consolidated, or compressed, to give it the desired thickness and density. This process is often followed by further thermal or mechanical treatments to ensure uniformity and stability in the fabric structure.   6. Finished Product Fabric Cutting and Winding: The consolidated nonwoven fabric is wound onto large rolls, which can be further processed to the desired size for diaper production. In all, that is the production process of spunbond nonwoven for diaper.  

When choosing an adult diaper, you need to pay attention to the following aspects, including comfort, absorbency, breathability, material safety, etc. The following are some specific selection criteria and raw materials of adult diapers that need attention:   1. Absorbency Absorbent layer material: The absorbent layer of diapers is generally composed of polymer absorbent material (SAP, Super Absorbent Polymer) and wood pulp. SAP can quickly absorb and lock liquid, keep the skin dry, and reduce urine reverse osmosis. Absorption rate: When choosing, you should consider its absorption rate, especially for adults with severe incontinence symptoms. The absorbent layer needs to be able to absorb urine quickly to avoid leakage or eczema. 2. Comfort Softness: The surface and lining of adult diapers need to be soft and comfortable to avoid friction with the skin and prevent skin discomfort or damage caused by long-term wear. Generally, spunbond nonwoven fabric or hot air nonwoven fabric is used as the surface layer. Elastic design: The waist and leg design should be elastic enough to fit the body better, provide comfort, and reduce urine leakage caused by inappropriate tightness. Seamless design: Seamless or smooth seam design can reduce friction and discomfort, and avoid skin damage, especially for the elderly or users with sensitive skin. 3. Breathability Breathable film: The outer layer of diapers usually uses breathable materials to help keep dry. When choosing, you can pay attention to whether there are ventilation holes to ensure that air can circulate, reduce moisture accumulation, and avoid skin diseases and odors. Leak-proof design: Choose diapers with good leak-proof design, such as leg guards and waist leak-proof strips. These designs can effectively prevent urine from leaking out while maintaining breathability. 4. Material safety When choosing adult diapers, the safety of raw materials is particularly important. Common raw materials for adult diapers include: Polymer absorbent material (SAP): SAP can expand after absorbing water, lock urine, and keep dry. High-quality SAP materials do not contain harmful substances and can reduce allergies and skin irritation. Chlorine-free bleached wood pulp: Wood pulp is the base material of the absorbent layer. It must be selected after chlorine-free bleaching to avoid harmful chemical residues. Fragrance-free or hypoallergenic fragrances: Some adult diapers may contain fragrances or antibacterial ingredients. Although these chemicals can reduce odor, they may cause allergic reactions. If you have a history of allergies or skin problems, it is recommended to choose fragrance-free or products designed for sensitive skin. PE film (polyethylene film): The outer material is mostly polyethylene film, which is waterproof. High-quality PE film should be breathable and non-irritating to avoid discomfort to the skin. 5. Size selection It is very important to choose the right size. Too tight may cause poor blood circulation, and too loose may easily leak urine. Most adult diapers have different size ranges, and you can choose the most suitable size according to your waist and hip circumference. Make sure that the diaper fits the curve of the body after wearing it to avoid gaps or pressure. 6. Brand and reputation Brand trust: Choosing adult diapers from well-known brands is usually more secure, with more stable product quality and better after-sales service. User evaluation: You can refer to the evaluation and recommendations of other users, especially the feedback from those who have actual use experience, to help better understand the comfort and use effect of the product. 7. Special functions Leak-proof design: Some adult diapers are specially designed with leak-proof systems, which are suitable for long-term use at night or when the amount of activity is high. Temperature control or antibacterial function: Some adult diapers also add temperature control or antibacterial materials to help prevent bacteria from growing and reduce discomfort, especially for users who are bedridden or have limited mobility. In short, when choosing adult diapers, you need to consider multiple factors such as comfort, absorbency, breathability and safety of raw materials to ensure that the product is suitable for your personal needs. In particular, people with sensitive skin should pay special attention to the chemical composition and materials in the product.