Introduction
When it comes to making sanitary napkins the quality of the product is very important. This means that every step of the way the materials and the way they are made have to be checked carefully. This includes the fabric, the parts, the paper and the packaging. All of these things can affect how safe, comfortable and good the product is. If there are small problems with the materials it can make a big difference in how well the product works. The Yurun laboratory is a place where they check all of these things in a controlled environment. They follow a lot of rules to make sure everything is just right. By checking everything carefully the people who make sanitary napkins can make sure their products are good and work well every time.
Non-woven Fabric Inspection
Non-woven fabrics are an important material which makes direct contact with the skin and hence their quality is very important for comfort as well as performance of the end products. In inspection, inspectors mainly check the quality of packaging and labels to ensure the material remains easily traceable. It should be clean without any contamination, wrinkles, marks or deformations in surface texture of the material. Edges should also be neat to ensure proper processing on the machine and should contain maximum two splices only on each roll. Odor test and fluorometric tests also take place. Laboratory inspections include dimensional checks such as diameter of the roll, core diameter, width, and basis weight. You should also ensure whiteness complies with the standards, test tensile strength in both the machine and cross directions, and conduct moisture, pH, and absorbency tests.
Functional Chip Inspection
Sanitary napkin products that use functional chips require both structural and functional testing because they offer extra functions such as cooling capability, antibacterial properties, and temperature sensitivity. First and foremost, you must package and store these products according to specific requirements. The chip surface must remain clean and uniformly thick, free of any impurities. Additionally, high-quality printing should appear on the chip surface without any color variations. A water resistance test can confirm that the printing does not suffer damage during transportation. Other tests involve roll finish, splice count (neat roll finishing), odor, and fluorescent substances. Tests related to size include roll dimensions, widths, and weights. Other tests include moisture control, pH value control, hydrophilicity, magnetism (function), antioxidant effect confirmation, uniformly dispersed powder with no clumping, and temperature sensitivity color change tests at designated temperatures.
Airlaid Paper Inspection
As one of the absorbents in sanitary napkins, airlaid paper directly influences liquid absorbing capacity, capability of retaining liquid, and overall performance. Inspections of the material start from examining its packaging to see if it is intact, and labeling, to identify traceability. The material must have a clean and even surface with no contaminants. Edges of the rolls should not contain any burrs or other imperfections that could interfere with high-speed production processes. Generally, only up to two splices are permitted in each roll. Splice positions on the rolls must be marked. Tests can include detecting abnormal smell and fluorescence of the material. Other inspection tests involve measuring the diameter of the roll, its width, diameter of the core, and basis weight of the airlaid paper. In addition, whiteness, thickness, tensile strength, moisture, pH, and absorbency ratio tests should be performed. In many cases, absorbency performance should exceed eight times material weight.
Composite Absorbent Paper Inspection
It is crucial to have composite absorbent paper as an indispensable component to facilitate absorption, retention, and distribution of fluids in sanitary napkin products. It is important to use high absorbency materials as this will make the product dry and minimize chances of leakage. Cleanliness of packaging and prevention of contamination of the material are among the most important elements in the inspection process aimed at maintaining the purity of material. The surface of the material should always be neat and clean without having burrs or wrinkles on its edge. The winding process must be efficient because winding failure may affect the operations of high-speed manufacturing machines. The number of splices during production should also be considered due to efficiency. Inspections on whether the material has an odor or fluorescence should be done. Inspections related to dimension will involve measurement of width, diameter of the roll, basis weight, and weight tolerances.
Back Sheet Film Inspection
Back sheet films serve the purpose of providing leak-proof protection, waterproofing, and structure to sanitary napkin products. The quality of back sheet film has an effect on the reliability, flexure, and durability of sanitary napkin products. The first step in the inspection process involves checking whether the packaging material is intact and clean in order to avoid contaminating the products during shipping and storage. Film quality must be tested to ensure that the film surface is smooth, free from wrinkles, deformation, scratches, or any contamination. Printing quality must also be checked for any blurring and fading. Adhesive quality is one of the aspects that require thorough inspection because it may affect product assembly. Odor test and fluorescence tests must be done to ensure that the product complies with hygiene product standards. Other tests involve checking the roll size, weight tolerance, film thickness, and whiteness of the film.
Release Paper Inspection
Release paper maintains the condition of the adhesive layers and promotes the smooth application of the product during both manufacturing and usage. The effectiveness of the release properties ensures the effectiveness of the manufacturing process and usability of the products manufactured. The process begins by inspecting packages and their labels for traceability of materials during manufacture. The release paper should have an even, wrinkle-free surface with no deformities and unevenly distributed silicon layer. The product is then inspected for any imperfections that would impact the performance of the end product. The number of splices is regulated to provide smooth functioning of the equipment and minimize machine breakdowns. The printing quality is also assessed for its accuracy of color shades and text reproduction. The material should not have an abnormal smell and fluorescence.
Packaging Film Inspection
Films used for packaging are very important for packaging presentation, sealing, shelf presentation, and transportation. Packaging films made up of quality packaging materials enhance the safety of products and increase consumer satisfaction. Firstly, the laboratory tests the purity and smoothness of the packaging film, which should be without wrinkles and contamination. The packaging film should be consistent in terms of thickness and winding stability to support high-speed packaging. Printing shouldn’t affect print quality causing shadowed prints and blurred colors. The use of adhesive tapes should be consistent without color changes to ensure sealing stability and secure adhesion. Further laboratory testing ensures that there is no smell or fluorescence on the packaging film. The other testing involves dimensions, weights, and other characteristics like corona treatment value (>36 dyn/cm).
Packaging Bag Inspection
Packaging bags have great significance for product protection, transportation safety, and customer convenience. High quality may even help enhance the appearance on store shelves as well as improve the competitive advantages of the brand in the hygiene products industry. Requirements for inspections stipulate no contamination, wrinkling, deformities, or damages in the packaging process. It is imperative that the surface of the packaging bags be smooth and free from oil spots, ink marks, or printing defects. Colors used for printing must comply with standard samples to keep packaging appearance intact. Inspections will verify barcode reading capacity and font size compliance as well. Easy-to-open adhesive tapes should possess good adhesive properties but must not stick too firmly to allow easy opening when necessary. Further testing will check adhesive properties between two inner layers of packaging bags, odor tests, surface smoothness, air vent holes, and heat seal strength test. At minimum, heat seal strength should meet the requirement of 10N and dimensional tolerance inspection for length, width, and height.
Outer Carton Inspection
The outer cartons have the primary role of protecting sanitary napkin products during warehousing, loading, and transportation. High-quality and durable cartons will significantly reduce transportation damage and keep the quality of the products intact through the supply chain process. In the inspection process, the primary consideration is on completeness of packaging as well as the identification labels for traceability management purposes. The carton exterior should be clean, and there should be no any deformities, scratch, dirt, cuts, and damages. Carton printing such as colors, graphics, and texts should be intact. The quality of carton formation needs to be evaluated in order to avoid gaps, bad folding, and other misalignments which might hinder transportation efficiency. Adhesive bonding as well as the fixation by staples should be stable enough to cope with stacking pressure and transportation needs. Other tests performed include resistance to folding, strength assessment, and dimensional tolerance.
Conclusion
High-quality sanitary napkin products rely on strict inspection procedures throughout the entire manufacturing process. From nonwoven fabrics and absorbent papers to packaging films and outer cartons, every material must meet precise standards for cleanliness, safety, absorbency, durability, and functionality. Modern sanitary napkin manufacturing requires more than efficient production capacity because consumers increasingly expect products that provide comfort, hygiene, leak protection, and stable performance under different usage conditions. Through professional laboratory management and comprehensive testing procedures, manufacturers can identify potential quality risks early, improve product consistency, reduce defective rates, and maintain stable manufacturing standards across different batches. Rigorous inspection is not only an important manufacturing requirement but also a reflection of a company’s commitment to product reliability, consumer safety, and long-term brand trust. To learn more about professional sanitary napkin manufacturing and quality inspection solutions, please visit our HOME – OEM & Private Label sanitary napkins Manufacturer – Global Top Care Manufacturer OEM Factory. for more.