Coated fabrics have been used in many applications such as agriculture, geotextiles, building and construction, medical, filtration and protective clothing. Coating of fabrics involves applying viscous liquid on the surface of the substrate before undergoing drying or curing process.
In a study conducted at University Teknologi MARA, Malaysia, researchers prepared a report on the tensile and tearing strength of natural rubber latex (NRL) high strength coated fabrics. 29 Plain woven Kevlar fabrics were coated with pre-vulcanised NRL using single-dip(SD), double-dip(DD) and triple-dip(TD) coating methods.
Both the tensile and tearing strength tests were done according to American Standard for Testing and Material (ASTM) using Testometric Tensile Tester and observations were made on their modes of failure.
In addition, a Field Emission Scanning Electron Microscopy (FESEM) was also done in order to observe the bonding between fibre and NRL. The NRL coated fabrics showed higher tensile and tearing strength in comparison with the uncoated fabrics.
The tensile strength for the SD-, DD- and TD-coated fabrics were 12%, 8% and 10% higher than the uncoated fabrics respectively. Similarly, the tearing strength for SD-, DD- and TD-coated fabrics were 9%, 12% and 18% higher than the uncoated fabric.
Overall, it was shown that the tensile and tearing strength of NRL coated fabrics was higher than uncoated fabric. A follow-up study was done using unidirectional fabrics, nano fillers and fabric stitching under the same group and reported that NRL coated fabrics still gives higher puncture resistance in comparisons with uncoated fabrics.
There were significant differences between the uncoated and NRL coated fabric. After each coating, the fabric’s real density and thickness increased. The NRL film on the fabric surface restricts the yarn’s freedom of movement under loading.
The energy absorption and elongation of the NRL coated fabric also increases as NRL layer helps absorbs the energy and increases the strength values before the fabric completely fails by breaking or tearing. It also assists the yarns to bunch together and resist the propagation of tear or break by sharing the load with a greater number of yarns before the fabric is completely failed.
Additionally, this research found that coating with NRL increase the energy absorption and the elasticity characteristics of the coated fabrics and prevents severe damage during loading. Therefore, the use of NRL as a coating element combined with high strength woven fabric such as Kevlar improves the fabric tensile and tearing strength.
In the future, the use of synthetic rubber may replace NRL to maximize the apprehension of coated fabric for ballistic impact penetration resistance.Contact Information:
Fast flowing heat in layered material heterostructures
18.12.2017 | Graphene Flagship
One in 5 materials chemistry papers may be wrong, study suggests
15.12.2017 | Georgia Institute of Technology
A study carried out by an international team of researchers and published in the journal Physical Review X shows that ion-trap technologies available today are suitable for building large-scale quantum computers. The scientists introduce trapped-ion quantum error correction protocols that detect and correct processing errors.
In order to reach their full potential, today’s quantum computer prototypes have to meet specific criteria: First, they have to be made bigger, which means...
Since 2016, German and Spanish researchers, among them scientists from the University of Göttingen, have been hunting for exoplanets with the “Carmenes”...
DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
Researchers have created chemical amplifiers and a chemical oscillator using a systematic method that has the potential to embed sophisticated circuit...
MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...
Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...
11.12.2017 | Event News
08.12.2017 | Event News
07.12.2017 | Event News
18.12.2017 | Life Sciences
18.12.2017 | Materials Sciences
18.12.2017 | Life Sciences