The world’s first synthetic fiber is the petroleum product “Nylon 6.” It is discovered by a DuPont chemist who produces the polymer from chemicals found in oil.

petroleum product nylon

“Women show off their nylon pantyhose to a newspaper photographer, circa 1942,” notes historian Jennifer S. Li in “The Story of Nylon – From a Depressed Scientist to Essential Swimwear.” Photo by Dale Rooks.

petroleum product nylon

Du Pont models at the 1939 New York World’s Fair demonstrate nylon’s strength.

Du Pont Corporation foresees the future artificial fibers “strong as steel.” The chemical company becomes a global giant as its scientist create consumer products out of nylon, rayon and lucite.

The world’s first synthetic fiber – nylon – is discovered on February 28, 1935, by a former Harvard professor working at a DuPont Corporation research laboratory.

Later called Nylon 6 by scientists, the revolutionary product comes from chemicals found in petroleum.

Professor Wallace Carothers had experimented with artificial materials for more than six years. He previously discovered neoprene rubber (commonly used in wetsuits) and made major contributions to understanding polymers – large molecules composed in long chains of repeating chemical structures.

petroleum product nylon

DuPont names the new petroleum product nylon – although chemists call it Nylon 6 because the adipic acid and hexamethylene diamine each contain 6 carbon atoms per molecule.

Just 32-years-old, Carothers creates fibers when he combines the chemicals amine, hexamethylene diamine, and adipic acid.

He forms a polymer chain using a process in which individual molecules join together with water as a byproduct.

However, the fibers are weak, explains a PBS series, “A Science Odyssey: People and Discoveries.”

“Carothers’ breakthrough came when he realized the water produced by the reaction was dropping back into the mixture and getting in the way of more polymers forming,” notes the PBS website. “He adjusted his equipment so that the water was distilled and removed from the system. It worked!”

DuPont will name the petroleum product nylon – although chemists call it Nylon 6 because the adipic acid and hexamethylene diamine each contain six carbon atoms per molecule.

Each molecule consists of 100 or more repeating units of carbon, hydrogen, and oxygen atoms, strung in a chain. A single filament of nylon may have a million or more molecules, each taking some of the strain when the filament is stretched.

petroleum product nylon

Nylon was first used commercially for toothbrush bristles and then used for women’s stockings in the 1940s. Above, a DuPont 1948 advertisement.

Replacing Hog Bristles 

During WWII, Nylon was used as a substitute for silk in parachutes.

During WWII, Nylon was used as a substitute for silk in parachutes.

The first commercial use of this revolutionary petroleum product was for toothbrushes.

On February 24, 1938, the Weco Products Company of Chicago, Illinois, began selling its new “Dr. West’s Miracle-Tuft” – the earliest toothbrush to use synthetic DuPont nylon bristles.

Americans will soon brush their teeth with nylon – instead of hog bristles, declared an article in the New York Times.

“Until now, all good toothbrushes were made with animal bristles,” noted a 1938 Weco Products advertisement in Life magazine. “Today, Dr. West’s new Miracle-Tuft is a single exception. It is made with EXTON, a unique bristle-like filament developed by the great DuPont laboratories, and produced exclusively for Dr. West’s.”

Pricing its toothbrush at 50 cents, the Weco Products Company guaranteed “no bristle shedding.” Johnson & Johnson of New Brunswick, New Jersey, will introduce a competing nylon-bristle toothbrush in 1939.

Nylon Stockings

Although DuPont patented nylon in 1935, it was not officially announced to the public until October 27, 1938 in New York City.

A DuPont vice president unveils the world’s first synthetic fiber – not to a scientific society or industry association – but to 3,000 Women’s Club members gathered at the site of the upcoming 1939 New York World’s Fair.

petroleum product nylon

“Until now, all good toothbrushes were made with animal bristles,” notes a 1938 magazine advertisement for “Dr. West’s Miracle-Tuft.” Johnson & Johnson will introduce a nylon-bristle toothbrush in 1939.

“He spoke in a session entitled ‘We Enter the World of Tomorrow,’ which was keyed to the theme of the forthcoming fair, the World of Tomorrow,” explains DuPont historian David A. Hounshell.

The petroleum product was an instant hit, especially as a replacement for silk in hosiery. DuPont built a full-scale nylon plant in Seaford, Delaware, and began commercial production in late 1939.

The company purposefully did not register “nylon” as a trademark – choosing to allow the word to enter the American vocabulary as a synonym for “stockings.”

Nylon became far and away the biggest money-maker in the history of DuPont, and its success proved so powerful that it soon led the company’s executives to derive a new formula for growth, according to David A. Hounshell in The Nylon Drama.

“By putting more money into fundamental research, Du Pont would discover and develop ‘new nylons,’ that is, new proprietary products sold to industrial customers and having the growth potential of nylon,” he explains.

Carothers did not live to see the widespread application of his work – in consumer goods such as toothbrushes, fishing lines, luggage and lingerie, or in special uses such as surgical thread, parachutes, or pipes – nor the powerful effect it had in launching a whole era of synthetics.

“Early in 1937 his favorite sister died suddenly. He never recovered from the loss…and in April of that year he committed suicide. DuPont later named its research station after him.”

The DuPont website notes the Carothers invention “changed the way people dressed worldwide and rendered the term ‘silk stocking’ – once an epithet directed at the wealthy elite – obsolete.

“Its success also encouraged DuPont’s management to adopt a long-term strategy of growth through products developed out of basic research.”

Please support the American Oil & Gas Historical Society with a donation.