What is the moisture – vapor transmission rate of PLA Thermbonded Nonwoven?

As a supplier of PLA thermbonded nonwoven, I’ve witnessed firsthand the growing interest in this innovative material. One of the most frequently asked questions from our customers is about the moisture – vapor transmission rate (MVTR) of our PLA thermbonded nonwoven. In this blog, I’ll delve into what MVTR is, why it matters for PLA thermbonded nonwoven, and how our products perform in this aspect. PLA Thermbonded Nonwoven

Understanding the Moisture – Vapor Transmission Rate

The moisture – vapor transmission rate is a measure of the amount of water vapor that can pass through a material over a specific period under certain conditions. It is typically expressed in grams per square meter per 24 hours (g/m²/24h). MVTR is a crucial property for many applications, as it determines how well a material can allow moisture to escape while preventing the ingress of liquid water.

For example, in the medical field, a high MVTR is essential for surgical gowns and wound dressings. A high MVTR allows sweat and moisture from the body to evaporate, keeping the wearer dry and comfortable, while also reducing the risk of bacterial growth due to excessive moisture. In the textile industry, MVTR is important for sportswear and outdoor clothing, as it helps to regulate body temperature and prevent the build – up of sweat.

Why MVTR Matters for PLA Thermbonded Nonwoven

PLA (polylactic acid) is a biodegradable and renewable polymer derived from plant sources such as corn starch or sugarcane. PLA thermbonded nonwoven is made by bonding PLA fibers together using heat, creating a fabric – like material with unique properties.

The MVTR of PLA thermbonded nonwoven is significant for several reasons. Firstly, in applications such as disposable hygiene products like diapers and sanitary napkins, a high MVTR ensures that moisture from the body can be quickly removed, keeping the skin dry and reducing the risk of skin irritation. Secondly, in the packaging industry, a proper MVTR can help to maintain the freshness of food products by allowing moisture to escape while preventing the entry of external moisture.

Factors Affecting the MVTR of PLA Thermbonded Nonwoven

Several factors can influence the MVTR of PLA thermbonded nonwoven:

Fiber Structure and Density: The structure and density of the PLA fibers in the nonwoven play a crucial role. A more open and porous structure allows for better moisture – vapor transmission. If the fibers are tightly packed, the MVTR may be lower as it becomes more difficult for water vapor to pass through.
Thickness of the Nonwoven: Generally, thinner nonwovens have a higher MVTR compared to thicker ones. This is because the shorter diffusion path in thinner materials allows water vapor to pass through more easily.
Additives and Treatments: The addition of certain additives or surface treatments can affect the MVTR. For example, some hydrophobic additives may reduce the MVTR by creating a barrier to water vapor, while hydrophilic treatments can enhance it by attracting and facilitating the passage of water vapor.

Measuring the MVTR of Our PLA Thermbonded Nonwoven

At our company, we use standardized testing methods to measure the MVTR of our PLA thermbonded nonwoven. One of the most common methods is the ASTM E96 standard, which involves placing a sample of the nonwoven between a water – containing chamber and a dry chamber. The weight loss of the water in the chamber over a specific period is measured, and the MVTR is calculated based on the sample area and the time elapsed.

Our testing results show that our PLA thermbonded nonwoven has a relatively high MVTR, which makes it suitable for a wide range of applications. For instance, in our disposable hygiene products, the high MVTR helps to keep the skin dry and comfortable, reducing the risk of diaper rash. In our packaging products, it helps to maintain the quality and freshness of the contents.

Applications of PLA Thermbonded Nonwoven with High MVTR

Disposable Hygiene Products: As mentioned earlier, our PLA thermbonded nonwoven with high MVTR is ideal for diapers, sanitary napkins, and adult incontinence products. It provides a comfortable and dry environment for the user, while also being environmentally friendly due to its biodegradable nature.
Medical Applications: In the medical field, our nonwoven can be used for surgical gowns, drapes, and wound dressings. The high MVTR helps to keep the patient and medical staff dry and reduces the risk of infection.
Packaging: For food packaging, our nonwoven can be used to wrap fresh produce, meat, and other perishable items. The appropriate MVTR helps to prevent the build – up of moisture inside the package, which can lead to spoilage.

Our Commitment to Quality and Innovation

As a supplier, we are committed to providing high – quality PLA thermbonded nonwoven with excellent MVTR properties. We continuously invest in research and development to improve the performance of our products. Our team of experts is constantly exploring new fiber structures, additives, and manufacturing processes to optimize the MVTR and other properties of our nonwoven.

We also understand the importance of environmental sustainability. PLA is a renewable and biodegradable material, which aligns with the growing demand for eco – friendly products. By offering high – performance PLA thermbonded nonwoven, we are not only meeting the needs of our customers but also contributing to a more sustainable future.

Conclusion

The moisture – vapor transmission rate is a critical property of PLA thermbonded nonwoven. Our products offer a high MVTR, making them suitable for a variety of applications in the hygiene, medical, and packaging industries. If you are looking for a high – quality, eco – friendly nonwoven material with excellent MVTR, we would love to hear from you. Whether you are a manufacturer of disposable products, a medical institution, or a packaging company, our PLA thermbonded nonwoven can meet your specific requirements.

PP SMS Nonwoven Fabric If you are interested in learning more about our products or would like to discuss a potential partnership, please feel free to reach out to us. We are eager to work with you and provide the best solutions for your business.

References

ASTM E96 – Standard Test Methods for Water Vapor Transmission of Materials.
“Biodegradable Polymers for Medical Applications” – Journal of Biomedical Materials Research.
“Nonwoven Materials: Structure, Properties, and Applications” – CRC Press.

Quanzhou Smartwin New Materials Co., Ltd.
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