Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


The natural “coat” for a stronger outfit.

A report on the tensile and tearing strength of natural rubber latex (NRL) high strength coated fabrics.

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:
Nur Awatif Ahmad*,
Faculty of Applied Science,
Universiti Teknologi MARA, Malaysia.

Darmarajah Nadarajah | Research asia research news
Further information:

More articles from Materials Sciences:

nachricht Custom sequences for polymers using visible light
22.03.2018 | Tokyo Metropolitan University

nachricht The search for dark matter widens
21.03.2018 | American Institute of Physics

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Researchers Discover New Anti-Cancer Protein

An international team of researchers has discovered a new anti-cancer protein. The protein, called LHPP, prevents the uncontrolled proliferation of cancer cells in the liver. The researchers led by Prof. Michael N. Hall from the Biozentrum, University of Basel, report in “Nature” that LHPP can also serve as a biomarker for the diagnosis and prognosis of liver cancer.

The incidence of liver cancer, also known as hepatocellular carcinoma, is steadily increasing. In the last twenty years, the number of cases has almost doubled...

Im Focus: Researchers at Fraunhofer monitor re-entry of Chinese space station Tiangong-1

In just a few weeks from now, the Chinese space station Tiangong-1 will re-enter the Earth's atmosphere where it will to a large extent burn up. It is possible that some debris will reach the Earth's surface. Tiangong-1 is orbiting the Earth uncontrolled at a speed of approx. 29,000 km/h.Currently the prognosis relating to the time of impact currently lies within a window of several days. The scientists at Fraunhofer FHR have already been monitoring Tiangong-1 for a number of weeks with their TIRA system, one of the most powerful space observation radars in the world, with a view to supporting the German Space Situational Awareness Center and the ESA with their re-entry forecasts.

Following the loss of radio contact with Tiangong-1 in 2016 and due to the low orbital height, it is now inevitable that the Chinese space station will...

Im Focus: Alliance „OLED Licht Forum“ – Key partner for OLED lighting solutions

Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, provider of research and development services for OLED lighting solutions, announces the founding of the “OLED Licht Forum” and presents latest OLED design and lighting solutions during light+building, from March 18th – 23rd, 2018 in Frankfurt a.M./Germany, at booth no. F91 in Hall 4.0.

They are united in their passion for OLED (organic light emitting diodes) lighting with all of its unique facets and application possibilities. Thus experts in...

Im Focus: Mars' oceans formed early, possibly aided by massive volcanic eruptions

Oceans formed before Tharsis and evolved together, shaping climate history of Mars

A new scenario seeking to explain how Mars' putative oceans came and went over the last 4 billion years implies that the oceans formed several hundred million...

Im Focus: Tiny implants for cells are functional in vivo

For the first time, an interdisciplinary team from the University of Basel has succeeded in integrating artificial organelles into the cells of live zebrafish embryos. This innovative approach using artificial organelles as cellular implants offers new potential in treating a range of diseases, as the authors report in an article published in Nature Communications.

In the cells of higher organisms, organelles such as the nucleus or mitochondria perform a range of complex functions necessary for life. In the networks of...

All Focus news of the innovation-report >>>



Industry & Economy
Event News

Virtual reality conference comes to Reutlingen

19.03.2018 | Event News

Ultrafast Wireless and Chip Design at the DATE Conference in Dresden

16.03.2018 | Event News

International Tinnitus Conference of the Tinnitus Research Initiative in Regensburg

13.03.2018 | Event News

Latest News

Modular safety concept increases flexibility in plant conversion

22.03.2018 | Trade Fair News

New interactive map shows climate change everywhere in world

22.03.2018 | Earth Sciences

New technologies and computing power to help strengthen population data

22.03.2018 | Earth Sciences

Science & Research
Overview of more VideoLinks >>>