Discover the science behind Kevlar; The ultimate synthetic fibre for bullet proof protection
Kevlar is a high-strength, lightweight synthetic fiber that is used in a variety of applications, including bulletproof vests. Kevlar is made from poly-paraphenylene terephthalamide, which is a polymer that is produced from terephthalic acid and p-phenylene diamine. Kevlar has a high tensile strength, which means that it can withstand a great deal of force before breaking. It is also very resistant to heat and chemicals. These properties make Kevlar ideal for use in bulletproof vests.
When a bullet hits a Kevlar vest, the fibers of the vest absorb the energy of the bullet. The fibers are arranged in a way that allows them to interlock and trap the bullet. This prevents the bullet from penetrating the vest and injuring the wearer. The number of layers of Kevlar in a vest will determine the level of protection that it provides. A vest with more layers will be able to stop a higher-powered bullet.
Kevlar bulletproof vests are very effective at stopping bullets. However, they are not 100% effective. In some cases, a bullet may be able to penetrate a Kevlar vest. This is more likely to happen if the bullet is powerful or if it hits the vest at a certain angle. Kevlar vests are also not effective against knives or other sharp objects.
Despite their limitations, Kevlar bulletproof vests are an important safety device for law enforcement officers, military personnel, and other individuals who are at risk of being shot. They can help to save lives and prevent serious injuries.
In addition to bulletproof vests, Kevlar is also used in a variety of other applications. It is used in body armor, helmets, gloves, and other protective gear. Kevlar is also used in high-performance tires, racing sails, and other applications where strength and lightweight are important.
Kevlar is a versatile material with a wide range of applications. It is a valuable tool for protecting people and property.
Here are some additional benefits of using Kevlar in bulletproof jackets:
►Kevlar is lightweight and comfortable to wear. This makes it ideal for use in situations where the wearer needs to be able to move freely, such as law enforcement officers and military personnel.
►Kevlar is durable and can withstand repeated use. This makes it a cost-effective investment for organizations that need to provide their employees with body armor.
►Kevlar is available in a variety of colors and styles. This allows organizations to choose a vest that is appropriate for their needs and the needs of their employees.
Overall, Kevlar is an excellent material for use in bulletproof jackets. It is strong, lightweight, durable, and available in a variety of colors and styles. Kevlar bulletproof jackets can provide a high level of protection for law enforcement officers, military personnel, and other individuals who are at risk of being shot.
Girish Linganna
Aerospace & Defence Analyst
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High courts upheld only 8 per cent of death sentences; SC confirms none in recent years: Report
New Delhi (PTI): Highlighting that a high acquittal rate of death row convicts by the Supreme Court and high courts demonstrates a pattern of "erroneous or unjustified convictions", a study of 10 years of death penalty data has revealed that the top court did not confirm any death sentences in recent years.
The study by Square Circle Clinic, a criminal laws advocacy group with the NALSAR University of Law in Hyderabad, found that an overwhelming majority of death sentences imposed by trial courts did not withstand scrutiny at higher judicial levels. Acquittals far outnumbered confirmations at both the high courts and Supreme Court levels.
According to the report, the trial courts across India awarded 1,310 death sentences in 822 cases between 2016 and 2025. High courts considered 842 of these sentences in confirmation proceedings but upheld only 70 or 8.31 per cent.
In contrast, 258 death sentences (30.64 per cent) resulted in acquittals. The study noted that the acquittal rate at the high court level was nearly four times the confirmation rate.
Data showed that of the 70 death sentences confirmed by high courts, the Supreme Court decided 38 and did not uphold a single one. The apex court has confirmed no death sentences between 2023 and 2025.
"Wrongful or erroneous or unjustified convictions, then, are not random or freak accidents in the Indian criminal justice system. The data indicates they are a persistent and serious systemic concern," the report said.
Over the last decade, high courts adjudicated 1,085 death sentences in 647 cases, confirming only 106 (9.77 per cent). During this period, 326 persons in 191 cases, were acquitted.
The report attributed low confirmation rates to the appellate judiciary’s concerns regarding failures in due process. "This coincides with increased Supreme Court scrutiny of safeguards at the sentencing stage," the report said.
Of the 153 death sentences decided by the apex court over the last decade, the accused were acquitted in 38 cases. In 2025 alone, high courts overturned death sentences into acquittals in 22 out of 85 cases (over 25 per cent). The same year, Supreme Court acquitted accused persons in more than half of the death penalty cases it decided (10 out of 19), the report said.
The study highlighted that 364 persons who were ultimately acquitted "should not even have been convicted and unjustifiably suffered the trauma of death row". It added that such failures extend beyond adjudication and reflect serious lapses in investigation and prosecution.
The question of remedies for wrongful convictions remains pending before the Supreme Court. In September 2025, three persons acquitted by the apex court filed writ petitions seeking compensation from the state and argued that their wrongful convictions violated their fundamental right to life and liberty under Article 21 of the Constitution.
"In 2022, the Supreme Court crystallised a sentencing process in Manoj v. State of Madhya Pradesh , and mandated all courts to follow those guidelines before imposing or confirming a death sentence," the report read.
In 2025, the apex court held in Vasanta Sampat Dupare v. Union of India that death penalty sentencing hearings form part of the right to a fair trial and stressed that capital punishment can be imposed only after a constitutionally compliant sentencing process.
"However, even at the high courts whether the process mandated under Manoj is being complied with is in doubt,” the report said.
