Hey there! As a supplier of SMS non woven fabric, I often get asked about the tensile strength of this material. So, I thought I'd write this blog to break it down for you.
First off, let's understand what SMS non woven fabric is. SMS stands for Spunbond - Meltblown - Spunbond. It's a composite non - woven fabric that combines the properties of spunbond and meltblown layers. The spunbond layers provide strength and durability, while the meltblown layer offers filtration and barrier properties.
Now, what exactly is tensile strength? Tensile strength is the maximum amount of tensile (pulling) stress that a material can withstand before breaking or failing. In simpler terms, it's how much you can pull on the fabric before it tears apart.
The tensile strength of SMS non woven fabric can vary based on several factors. One of the key factors is the weight or basis weight of the fabric. Generally, as the basis weight increases, the tensile strength also goes up. A heavier fabric has more fibers per unit area, which means there are more fibers to resist the pulling force.
The manufacturing process also plays a huge role. The way the spunbond and meltblown layers are bonded together affects the overall strength of the fabric. If the bonding is strong, the layers work together effectively to distribute the pulling force, resulting in higher tensile strength.
Another factor is the type of polymers used. Most SMS non woven fabrics are made from polypropylene (PP). The quality and characteristics of the PP resin can impact the strength. High - quality PP with the right molecular structure will contribute to better tensile properties.
Let's talk about how we measure the tensile strength of SMS non woven fabric. Usually, we use a tensile testing machine. The fabric sample is clamped at both ends, and then a steadily increasing pulling force is applied until the sample breaks. The maximum force recorded during this process is the tensile strength. The results are typically reported in units like Newtons per meter (N/m) or pounds per inch (psi).
For example, a common range of tensile strength for light - weight SMS non woven fabric used in some medical applications might be around 10 - 20 N/m in the machine direction (MD) and 5 - 10 N/m in the cross - machine direction (CD). Medium - weight fabrics can have tensile strengths in the range of 20 - 40 N/m (MD) and 10 - 20 N/m (CD). Heavy - weight SMS non woven fabrics, which are used in more demanding applications like industrial covers, can have even higher tensile strengths, sometimes exceeding 50 N/m in the MD.
The difference in tensile strength between the machine direction and the cross - machine direction is due to the way the fabric is manufactured. In the machine direction, the fibers are more aligned, which gives the fabric more strength. In the cross - machine direction, the fibers are oriented in a more random way, resulting in lower strength.
Now, let's see where the tensile strength of SMS non woven fabric matters in real - world applications. In the medical field, SMS non woven fabric is used for surgical gowns, drapes, and masks. These products need to have a certain level of tensile strength to ensure they don't tear during use. A torn surgical gown or drape could compromise the sterility of the surgical area, putting the patient at risk.
In the hygiene industry, like for disposable diapers and sanitary napkins, the fabric needs to be strong enough to hold the absorbent materials in place and withstand the movement of the user. If the fabric tears easily, it can lead to leakage and a poor user experience.
For industrial applications, such as Biodegradable TNT PP Non Woven Fabric, which can be used for packaging or as protective covers, high tensile strength is crucial. It ensures that the fabric can protect the contents from damage during handling and transportation.
Non Woven Fabric for Cap also requires a decent amount of tensile strength. Caps are often subject to stretching and pulling when being put on and taken off. If the fabric tears easily, the cap won't be able to maintain its shape and functionality.
And Non Woven Tree Wrapping Tape needs to be strong enough to stay in place around the tree trunk. It has to withstand environmental factors like wind and rain, as well as the natural expansion and contraction of the tree.
As a supplier, we make sure to control all the factors that affect the tensile strength of our SMS non woven fabric. We use high - quality raw materials, optimize the manufacturing process, and conduct strict quality control checks. This way, we can provide our customers with fabric that meets their specific tensile strength requirements.
If you're in the market for SMS non woven fabric and have specific tensile strength needs for your application, don't hesitate to reach out. Whether it's for medical, hygiene, industrial, or any other use, we can work with you to find the perfect solution. We're here to answer all your questions and help you make the right choice. So, get in touch with us for a discussion on your procurement needs.
References
- ASTM D5034 - Standard Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test)
- ISO 13934 - 1:2013 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method