In the competitive nonwoven fabric market, offering high – performance products is crucial for sustainable business growth. As a spunlace nonwoven fabric supplier, I’ve witnessed the increasing demand for oil – repellent spunlace nonwoven fabrics in various industries. This blog aims to share insights into the process of making spunlace nonwoven fabric oil – repellent, providing a comprehensive guide for those interested in this advanced material. Spunlace Nonwoven Fabric
Understanding Spunlace Nonwoven Fabric
Before delving into the oil – repellent treatment, it’s essential to understand what spunlace nonwoven fabric is. Spunlace nonwoven fabric is made by entangling fibers together using high – pressure water jets. This process creates a fabric with good drapability, softness, and high strength. It is widely used in many industries such as medical, hygiene, and clothing due to its excellent properties.
The raw materials for spunlace nonwoven fabric can vary, including natural fibers like cotton and viscose, and synthetic fibers such as polyester and polypropylene. The choice of fiber affects the fabric’s basic properties, and in turn, influences the effectiveness of the oil – repellent treatment.
The Importance of Oil – Repellent Spunlace Nonwoven Fabric
Oil – repellent spunlace nonwoven fabric has become increasingly popular in recent years. In the industrial sector, it can be used for protective clothing, wiping cloths, and filtration materials. In the food industry, oil – repellent fabrics are used for packaging to prevent oil from seeping through and soiling the outer packaging. In the medical field, it can be used for surgical gowns and drapes to protect medical staff from oil – based contaminants.
Methods of Making Spunlace Nonwoven Fabric Oil – Repellent
1. Chemical Treatment
One of the most common methods is chemical treatment. This involves applying oil – repellent agents to the spunlace nonwoven fabric. There are several types of oil – repellent agents available on the market, and the choice depends on the specific requirements of the fabric.
- Fluorocarbon – based Agents: Fluorocarbon – based oil – repellent agents are widely used because of their excellent oil – repellent performance. They work by forming a thin film on the surface of the fabric fibers. The fluorocarbon chains in the agent have a low surface energy, which prevents oil droplets from spreading on the fabric surface and allows them to roll off easily. The application process typically includes padding the fabric in a solution containing the fluorocarbon agent, followed by drying and curing at a specific temperature. The curing process helps to ensure that the agent firmly adheres to the fabric fibers. However, it should be noted that some fluorocarbon – based agents may have environmental concerns, such as the release of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), which are persistent organic pollutants.
- Non – fluorocarbon – based Agents: In recent years, there has been a growing interest in non – fluorocarbon – based oil – repellent agents due to environmental regulations. These agents are often made from polymers such as silicone or modified waxes. Silicone – based agents can provide good oil – repellency by creating a smooth and hydrophobic surface on the fabric. Modified waxes can also form a protective layer on the fibers. The application process of non – fluorocarbon – based agents is similar to that of fluorocarbon – based agents, but the curing conditions may be different.
2. Surface Modification
Surface modification is another approach to make spunlace nonwoven fabric oil – repellent. This method involves changing the surface properties of the fabric fibers without adding external agents.
- Plasma Treatment: Plasma treatment is a physical surface modification method. In this process, the fabric is exposed to a plasma environment, which contains high – energy ions, radicals, and electrons. The plasma can etch the surface of the fabric fibers, increasing their surface roughness. At the same time, it can introduce functional groups onto the fiber surface, such as hydrophobic groups. The increased surface roughness and the presence of hydrophobic groups enhance the oil – repellency of the fabric. Plasma treatment has the advantage of being a dry process, which is environmentally friendly and does not require the use of large amounts of chemicals.
- Nanofiber Coating: Nanofiber coating is a more advanced surface modification technique. Nanofibers can be produced by electrospinning or other methods and then deposited on the surface of the spunlace nonwoven fabric. The nanofibers form a porous and rough surface structure, which can effectively repel oil. The small diameter of the nanofibers and their high surface – to – volume ratio contribute to the excellent oil – repellent performance. Additionally, the nanofiber coating can be tailored to have specific properties by choosing different polymer materials.
Factors Affecting the Oil – Repellent Performance
Several factors can affect the oil – repellent performance of spunlace nonwoven fabric.
1. Fiber Type
As mentioned earlier, different fiber types have different surface properties and chemical compositions. Natural fibers like cotton are more hydrophilic, which means they have a greater tendency to absorb oil. Synthetic fibers such as polyester and polypropylene are more hydrophobic, making them more suitable for oil – repellent treatment. When choosing fibers for oil – repellent spunlace nonwoven fabric, it’s important to consider the balance between cost, performance, and environmental impact.
2. Treatment Concentration and Conditions
For chemical treatment, the concentration of the oil – repellent agent in the treatment solution is crucial. A higher concentration generally leads to better oil – repellent performance, but it may also increase the cost and have a negative impact on the fabric’s other properties, such as softness and breathability. The drying and curing temperature and time also affect the effectiveness of the treatment. Incorrect curing conditions can result in poor adhesion of the agent to the fabric fibers, reducing the oil – repellent performance.
3. Fabric Structure
The structure of the spunlace nonwoven fabric, including the fiber density and porosity, can influence its oil – repellent performance. A fabric with a higher fiber density and lower porosity is more likely to prevent oil penetration. However, a very dense fabric may have reduced breathability, which is an important property in many applications.
Quality Control of Oil – Repellent Spunlace Nonwoven Fabric
To ensure the quality of oil – repellent spunlace nonwoven fabric, strict quality control measures should be implemented.
1. Oil – Repellency Testing
There are several standard test methods for evaluating the oil – repellency of fabrics. One common method is the AATCC 118 test, which measures the resistance of the fabric to a series of hydrocarbon oils with different surface tensions. The higher the oil – repellency rating, the better the fabric’s ability to repel oil.
2. Durability Testing
In addition to initial oil – repellency, the durability of the oil – repellent treatment is also important. Durability testing involves subjecting the fabric to repeated washing, abrasion, or other environmental factors to simulate real – world usage. After the durability test, the fabric’s oil – repellency is re – evaluated to determine the effectiveness of the treatment over time.
Conclusion
Making spunlace nonwoven fabric oil – repellent is a complex process that involves choosing the right method, considering various factors, and implementing strict quality control. As a spunlace nonwoven fabric supplier, we are committed to providing high – quality oil – repellent products to meet the diverse needs of our customers. Whether you are in the industrial, food, or medical field, our oil – repellent spunlace nonwoven fabric can provide reliable performance.
Spunlace Nonwoven Fabric If you are interested in our oil – repellent spunlace nonwoven fabric, feel free to contact us for more information and to discuss your specific requirements. We look forward to the opportunity to work with you and provide the best solutions for your business.
References
- ASTM International. (20XX). Standard test methods related to nonwoven fabric properties.
- AATCC Technical Manual. (20XX). Test methods for fabric oil – repellency and durability.
- Textile Research Journal. Various issues on nonwoven fabric treatments and performance.
Hangzhou Gang Yu Health Products Co., Ltd.
Hangzhou Gang Yu Health Products Co., Ltd. is well-known as one of the leading spunlace nonwoven fabric manufacturers or suppliers in China, also supports customized service. Please feel free to wholesale cheap spunlace nonwoven fabric made in China here and get quotation from our factory. Quality products and low price are available.
Address: No.1 Yumin Road, Dangwan Town,311221, Xiaoshan District, Hangzhou City, Zhejiang Province, China (Mainland)
E-mail: sales@gynonwovens.com
WebSite: https://www.gynonwovens.com/
