As a supplier of non woven interlining, I often encounter questions from customers about the various properties and potential applications of our products. One question that comes up quite frequently is whether non woven interlining can be made waterproof. In this blog post, I'll delve into this topic, exploring the science behind waterproofing non woven interlining, the methods used, and the practical considerations.
Understanding Non Woven Interlining
Before we discuss waterproofing, it's essential to understand what non woven interlining is. Non woven interlining is a fabric made from fibers that are bonded together rather than woven. This bonding can be achieved through various methods, such as thermal bonding, chemical bonding, or mechanical bonding. The result is a fabric with unique properties, including flexibility, light - weight, and good shape retention.
There are different types of non woven interlining available in the market. For example, Chemical Bonded Non Woven Fabric is bonded using chemical adhesives, which provide a strong and stable structure. Bonded Lining Non Woven Interlining is commonly used as a lining material in clothing, offering a smooth and comfortable feel. And Non Woven Embroidery Interlining is designed to support embroidery work, ensuring that the stitches hold well and the design looks neat.
The Science of Waterproofing
Waterproofing a material involves creating a barrier that prevents water from penetrating the fabric. In the case of non woven interlining, this can be achieved by modifying the surface properties of the fibers or by adding a waterproof coating.
Surface Modification
One approach to waterproofing is to modify the surface of the fibers in the non woven interlining. This can be done through a process called hydrophobization. Hydrophobic substances repel water, so by treating the fibers with a hydrophobic agent, the surface energy of the fibers is reduced. When water comes into contact with the treated fibers, it forms beads and rolls off instead of being absorbed.
Waterproof Coatings
Another common method is to apply a waterproof coating to the non woven interlining. There are several types of coatings available, each with its own advantages and disadvantages.
Polymer Coatings
Polymer coatings, such as polyurethane (PU) or polyvinyl chloride (PVC), are widely used for waterproofing. These coatings form a continuous film on the surface of the non woven interlining, blocking the pores and preventing water from passing through. PU coatings are known for their flexibility and durability, making them suitable for applications where the fabric needs to bend and stretch. PVC coatings, on the other hand, are more rigid and offer excellent water resistance, but they may be less breathable.
Wax Coatings
Wax coatings have been used for waterproofing for a long time. Wax can be melted and applied to the non woven interlining, where it penetrates the fibers and fills the gaps between them. Wax - coated non woven interlining has a natural look and feel, and it can provide good water resistance. However, wax coatings may wear off over time, especially with frequent use and washing.
Practical Considerations
Breathability
One of the main challenges in waterproofing non woven interlining is maintaining breathability. When a fabric is made waterproof, it often becomes less breathable, which can cause discomfort when worn. This is because moisture from the body, such as sweat, cannot escape easily. To address this issue, manufacturers are constantly developing new technologies to create waterproof and breathable non woven interlining. For example, some coatings are designed to be microporous, allowing water vapor to pass through while still blocking liquid water.
Durability
The durability of the waterproofing treatment is another important consideration. The non woven interlining should be able to withstand repeated exposure to water, as well as normal wear and tear. This means that the waterproof coating or treatment should not peel off or lose its effectiveness over time. Factors such as washing, abrasion, and exposure to sunlight can all affect the durability of the waterproofing.
Compatibility with Other Processes
Non woven interlining is often used in combination with other fabrics and processes in the textile industry. When making it waterproof, it's important to ensure that the waterproofing treatment is compatible with these other materials and processes. For example, the treatment should not interfere with the bonding process if the non woven interlining is to be bonded to another fabric.
Applications of Waterproof Non Woven Interlining
Outdoor Clothing
Waterproof non woven interlining is widely used in outdoor clothing, such as jackets, pants, and hats. In these applications, the interlining provides an extra layer of protection against rain and snow, while also helping to maintain the shape of the garment. The breathability of the interlining is also crucial, as it allows the wearer to stay dry and comfortable even during strenuous activities.
Automotive Interiors
In the automotive industry, waterproof non woven interlining can be used for seat covers, door panels, and headliners. It helps to protect the interior of the vehicle from water damage, such as spills and leaks. The durability of the waterproofing treatment is especially important in this application, as the interlining needs to withstand long - term use and exposure to various environmental conditions.
Medical and Hygiene Products
Waterproof non woven interlining is also used in medical and hygiene products, such as surgical gowns, disposable diapers, and sanitary napkins. In these applications, the interlining provides a barrier against fluids, preventing leakage and contamination.
Conclusion
In conclusion, non woven interlining can indeed be made waterproof through various methods, including surface modification and the application of waterproof coatings. However, there are several practical considerations, such as breathability, durability, and compatibility, that need to be taken into account. With the continuous development of new technologies, the performance of waterproof non woven interlining is constantly improving, opening up new opportunities for its use in a wide range of industries.
If you're interested in purchasing waterproof non woven interlining or have any questions about our products, please feel free to contact us for further discussions and procurement negotiations. We're committed to providing high - quality non woven interlining solutions to meet your specific needs.
References
- Textile Science and Technology: Nonwovens, Volume 1 - Fundamentals, edited by W. Albrecht, H. Fuchs, W. Kittelmann
- Handbook of Nonwovens, edited by S. Anand, S. Rajendran
