How to test the physical properties of woodpulp polypropylene nonwoven?

As a supplier of woodpulp polypropylene nonwoven, I understand the critical importance of ensuring the high - quality physical properties of our products. In this blog, I will share some effective methods for testing the physical properties of woodpulp polypropylene nonwoven.

1. Tensile Strength Testing

Tensile strength is one of the most fundamental physical properties of woodpulp polypropylene nonwoven. It reflects the ability of the nonwoven to resist breaking under tension. To test the tensile strength, we usually use a universal testing machine.

First, cut the nonwoven sample into a standard rectangular shape, typically with a width of 50mm and a length of 200mm. Then, clamp the sample firmly between the grips of the testing machine. The testing machine will gradually apply a pulling force at a constant speed until the sample breaks. During the process, the machine records the maximum force applied and the elongation of the sample.

The tensile strength is calculated by dividing the maximum force by the cross - sectional area of the sample. Elongation at break, another important parameter, is calculated as the percentage increase in the length of the sample at the moment of breakage compared to its original length. High tensile strength and appropriate elongation at break are crucial for applications such as Industrial Cleaning Wiper and rags, where the nonwoven needs to withstand mechanical stress during use.

2. Bursting Strength Testing

Bursting strength measures the ability of the nonwoven to resist a concentrated force applied over a small area. This property is particularly important for nonwoven products that may encounter point - like forces in practical applications.

A bursting strength tester is used for this test. The nonwoven sample is clamped tightly on a circular test area. A rubber diaphragm is then pushed against the sample at a constant rate until the sample bursts. The maximum pressure at the moment of bursting is recorded as the bursting strength.

Good bursting strength ensures that the nonwoven can endure unexpected local pressures without tearing. For Industrial Workshop Cleaning, where the nonwoven may be used to clean rough surfaces or handle heavy - duty debris, a high bursting strength is essential.

3. Grammage Testing

Grammage refers to the mass per unit area of the nonwoven fabric, usually expressed in grams per square meter (g/m²). It is a key parameter that affects many other physical properties of the nonwoven, such as thickness, strength, and absorbency.

To measure the grammage, cut several samples of the nonwoven with a known area (e.g., 100cm²) using a sample cutter. Weigh these samples accurately using a precision balance. Then, calculate the grammage by dividing the total mass of the samples by their total area.

Controlling the grammage is crucial for maintaining product consistency. Different applications may require different grammages. For example, White Embossed Woodpulp And PP Wipers with higher grammage may have better absorbency and durability, while those with lower grammage may be more suitable for light - duty cleaning tasks.

4. Thickness Testing

The thickness of the woodpulp polypropylene nonwoven also plays an important role in its performance. A thicker nonwoven may have better insulation, absorbency, and strength, but it may also be more expensive and less flexible.

Thickness can be measured using a thickness gauge. Place the nonwoven sample between the two measuring surfaces of the gauge, and apply a specified pressure. The gauge will display the thickness of the sample.

It is important to measure the thickness at multiple points on the sample to ensure uniformity. Inconsistent thickness can lead to uneven performance of the nonwoven in practical applications.

5. Absorbency Testing

Absorbency is a critical property for many nonwoven products, especially those used for cleaning and wiping. There are several methods to test the absorbency of woodpulp polypropylene nonwoven.

One common method is the gravimetric method. First, weigh a dry nonwoven sample. Then, immerse the sample in a liquid (usually water) for a certain period of time (e.g., 10 minutes). After removing the sample from the liquid, let it drain for a short time to remove excess liquid. Weigh the wet sample again. The absorbency is calculated as the percentage increase in the mass of the sample after absorption compared to its dry mass.

Another method is the drip - absorption method. Place a drop of liquid on the nonwoven surface and measure the time it takes for the liquid to be completely absorbed. This method can provide information about the initial absorption rate of the nonwoven.

High absorbency is essential for products like Industrial Cleaning Wiper and rags, which need to quickly soak up liquids and contaminants.

6. Air Permeability Testing

Air permeability measures the ability of air to pass through the nonwoven fabric. It is an important property for applications where breathability is required, such as in some packaging and filtration applications.

An air permeability tester is used for this test. The nonwoven sample is clamped in the tester, and a constant pressure difference is applied across the sample. The tester measures the volume of air passing through the sample per unit area per unit time.

Appropriate air permeability can ensure the comfort and functionality of the nonwoven products. For example, in some filtration applications, a certain level of air permeability is needed to allow the passage of air while filtering out particles.

7. Softness Testing

Softness is a subjective property but can also be objectively measured to some extent. Softness is important for applications where the nonwoven comes into direct contact with the skin or delicate surfaces.

One way to measure softness is by using a handle - feel analyzer. This device measures the mechanical properties related to the tactile sensation of the nonwoven, such as bending stiffness and friction. A lower bending stiffness and appropriate friction coefficient usually indicate a softer nonwoven.

In products like some wiping cloths, softness can enhance the user experience and prevent damage to the surfaces being cleaned.

Conclusion

Testing the physical properties of woodpulp polypropylene nonwoven is a comprehensive process that involves multiple aspects. By accurately measuring these properties, we can ensure that our products meet the requirements of different applications. Whether it is for Industrial Cleaning Wiper and rags, Industrial Workshop Cleaning, or White Embossed Woodpulp And PP Wipers, high - quality nonwoven products with well - tested physical properties are essential.

If you are interested in our woodpulp polypropylene nonwoven products and would like to discuss purchasing, please feel free to contact us. We are committed to providing you with the best products and services.

References

1. ASTM International. ASTM standards related to nonwoven fabric testing.
2. ISO standards for nonwoven materials testing.
3. Textile Research Journal articles on the physical properties of nonwoven fabrics.