As a supplier of hot melt adhesive for baby and adult diapers, I’ve delved deep into the crucial role of adhesion in these products. Adhesion is not just a technical term; it’s the linchpin that holds together the various components of diapers, ensuring their functionality, comfort, and reliability. In this blog, I’ll explore the adhesion requirements for different types of non – woven fabrics used in baby and adult diapers, shedding light on the science and practical considerations behind this essential aspect of diaper manufacturing. Hot Melt Adhesive for Baby Diapers (adults)
Understanding Non – woven Fabrics in Diapers
Non – woven fabrics are a staple in diaper production. They offer a range of properties such as softness, breathability, and absorbency, which are vital for the well – being of the wearer. There are several types of non – woven fabrics commonly used in diapers:
- Spunbond Non – woven Fabrics: These are made by extruding molten polymer filaments onto a moving belt and then bonding them together. Spunbond non – woven fabrics are strong, durable, and have good tear resistance. They are often used for the outer layer of diapers, providing a protective barrier.
- Meltblown Non – woven Fabrics: Produced by blowing molten polymer through fine nozzles to form microfibers, meltblown non – woven fabrics are extremely fine and have high filtration efficiency. They are typically used in the absorbent core of diapers to trap and hold liquids.
- Spunlace Non – woven Fabrics: Created by entangling fibers using high – pressure water jets, spunlace non – woven fabrics are soft, drapable, and have a smooth surface. They are commonly used for the inner layer of diapers, coming into direct contact with the skin.
Adhesion Requirements for Different Non – woven Fabrics
1. Spunbond Non – woven Fabrics
The outer layer of diapers made from spunbond non – woven fabrics needs to adhere well to other components such as the elastic bands and the absorbent core. The adhesion must be strong enough to withstand the stretching and movement that occurs during normal use. A weak adhesion can lead to the elastic bands detaching or the layers separating, which not only affects the appearance of the diaper but also its functionality.
Our hot melt adhesive is formulated to provide excellent adhesion to spunbond non – woven fabrics. It has a high initial tack, which means it can quickly bond to the fabric surface when applied. This is crucial during the manufacturing process, as it allows for efficient production. Additionally, the adhesive has good heat resistance, ensuring that the bond remains intact even when the diaper is exposed to body heat.
2. Meltblown Non – woven Fabrics
Meltblown non – woven fabrics in the absorbent core require a different type of adhesion. The adhesive needs to bond the layers of the core together without blocking the pores of the fabric, as this would reduce the absorbency. Our hot melt adhesive is designed to have a low viscosity, which allows it to penetrate the fine fibers of the meltblown fabric without clogging them. It forms a strong, flexible bond that can withstand the expansion and contraction of the absorbent core as it absorbs and releases liquids.
3. Spunlace Non – woven Fabrics
The inner layer of diapers made from spunlace non – woven fabrics is in direct contact with the skin, so the adhesion must be gentle and non – irritating. Our hot melt adhesive is hypoallergenic and has a soft feel, ensuring that it does not cause any discomfort to the wearer. It bonds the spunlace fabric to the other layers of the diaper securely, while still allowing for the natural movement of the fabric.
Factors Affecting Adhesion
Several factors can affect the adhesion of hot melt adhesive to non – woven fabrics in diapers:
- Surface Energy: Different non – woven fabrics have different surface energies. The adhesive needs to have a compatible surface energy with the fabric to ensure good wetting and adhesion. Our adhesive is formulated to have a surface energy that matches the various non – woven fabrics used in diapers, maximizing the bond strength.
- Temperature: The application temperature of the hot melt adhesive is crucial. If the temperature is too low, the adhesive may not flow properly and may not bond well to the fabric. If the temperature is too high, it can damage the fabric or cause the adhesive to degrade. We provide detailed guidelines on the optimal application temperature for our adhesive to ensure consistent adhesion.
- Pressure: Adequate pressure is required during the bonding process to ensure that the adhesive spreads evenly and forms a strong bond. The manufacturing equipment used in diaper production must be calibrated to apply the right amount of pressure.
Quality Control and Testing
As a supplier, we take quality control very seriously. We conduct a series of tests to ensure that our hot melt adhesive meets the highest standards of adhesion for different non – woven fabrics in diapers.
- Peel Strength Test: This test measures the force required to peel the bonded layers apart. We perform peel strength tests on samples of diapers made with our adhesive to ensure that the bond is strong enough to withstand normal use.
- Shear Strength Test: The shear strength test measures the ability of the adhesive to resist forces that act parallel to the bonded surface. This is important as diapers are often subjected to shear forces during movement.
- Aging Test: We also conduct aging tests to simulate the long – term effects of use and storage on the adhesion. The samples are exposed to different environmental conditions such as heat, humidity, and light, and then the adhesion properties are tested again.
The Importance of Adhesion in Diaper Performance
Adhesion plays a vital role in the overall performance of diapers. A strong and reliable adhesion ensures that the diaper stays together during use, preventing leaks and providing a comfortable fit. It also contributes to the durability of the diaper, allowing it to withstand the rigors of daily activities.
For baby diapers, good adhesion is essential for the well – being of the baby. A poorly adhered diaper can cause discomfort, skin irritation, and even infections. For adult diapers, adhesion is equally important, as it helps to maintain the dignity and comfort of the wearer.
Conclusion
In conclusion, the adhesion of hot melt adhesive to different types of non – woven fabrics in baby and adult diapers is a complex but crucial aspect of diaper manufacturing. Our hot melt adhesive is specifically formulated to meet the unique adhesion requirements of each type of non – woven fabric, ensuring the highest quality and performance of the diapers.
Hot Melt Adhesive for Sanitary Napkins If you are in the diaper manufacturing industry and are looking for a reliable hot melt adhesive supplier, we would be more than happy to discuss your specific needs. Our team of experts can provide you with detailed information about our products and help you find the best solution for your production process. Contact us to start a procurement discussion and take your diaper manufacturing to the next level.
References
- ASTM International. (2023). Standard test methods for peel adhesion of pressure – sensitive tape.
- ISO. (2022). International standards for non – woven fabrics and adhesives in personal care products.
- Diaper Manufacturers Association. (2023). Best practices for adhesion in diaper production.
Daxing Hot Melt Adhesive Co., Ltd.
As one of the most experienced hot melt adhesive for baby diapers (adults) manufacturers in China, we also support customized service with low price. Please feel free to buy discount hot melt adhesive for baby diapers (adults) made in China here from our factory. For pricelist, contact us now.
Address: NO.5 WORKSHOP, SANHENG ROAD, INDUSTRIAL, 1ST ZONE, JIANGNAN VILLAGE, NANCUN TOWN, PANYU DISTRICT, GUANGZHOU CITY, GUANGDONG PROVINCE, CHINA
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WebSite: https://www.daxhotmelt.com/
