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What Are Clothes Made Of? Natural Fibers vs. Chemical Fibers

Category: Technology

Have you ever looked at the tag on the clothes you are wearing right now? You might see labels like "100% cotton," "wool," or "polyester." These materials fall into two main groups: natural fibers, which come from plants and animals, and manufactured fibers, made from raw materials such as oil or wood pulp. This article follows the history of common fibers to explain where they come from and how they become thread and fabric.

1. Natural Fibers and Chemical Fibers: The Two Main Groups of Clothing Fibers

Fibers used for fibers used to make clothing generally belong to one of two groups. The first is natural fibers, which are harvested from plants or animals. The second is chemical fibers, which humans manufacture from raw materials such as petroleum or wood pulp. Cotton, wool, silk, and cashmere are natural fibers. Nylon and polyester are chemical fibers. [1]

Chemical fibers themselves have two subtypes. One type, called regenerated fibers (such as rayon), is made by chemically processing natural raw materials like wood pulp. The other type, called synthetic fibers (such as nylon), is made by chemically joining molecules using petroleum as the starting point. [1]

2. Cotton: Where It Comes From and How People Have Used It

Cotton is made from the fluffy fibers that grow around the seeds of the cotton plant. Because it is cool and absorbs sweat well, it is often used for clothing worn close to the skin, such as T-shirts. The history of using cotton is very old. It is known that people in the Indus Civilization in the Indian subcontinent were already growing cotton and weaving cloth about 7,000 years ago. [1]

A major turning point for cotton came in Britain during the 18th century. In 1769, Arkwright invented the water frame, a spinning machine powered by water. [1] Then, in 1779, Crompton invented the spinning mule, which allowed for the mass production of strong, thin cotton thread. [7] The development of the cotton industry became a major driving force behind the Industrial Revolution in Britain.

3. Wool and Silk: Clothing Fibers That Come from Animals

Wool is a fiber made from sheep's fleece. The surface of wool hair has a structure called "scales," which look like tiny shingles. When the wool absorbs moisture, these scales open up and the fibers tangle together. Felt is made by using this tangling property to its advantage. [3]

Silk is a fiber taken from the cocoons made by the larvae of the silkworm, an insect. A single silkworm spins one continuous thread to make a cocoon, and this thread can be over 1,000 meters long. [2] The process of soaking cocoons in hot water to loosen the threads and combining several threads into one is called silk reeling. [2]

The origin of silkworm farming dates back to China about 5,000 years ago. Silk fabrics more than 4,700 years old have been excavated from ruins in Zhejiang Province. [2] For a long time, this technology was kept secret in China. Eventually, trade routes developed that connected Central Asia to Europe, and these routes became known as the Silk Road. [2]

4. Cashmere: Why This Goat Fiber Is So Expensive

Cashmere is a fiber taken from the soft undercoat of the cashmere goat. This undercoat grows to protect the goat from the cold. [4] The reason cashmere is so expensive is that it is rare. A single Cashmere goat produces only about 150 to 250 grams of this undercoat. A single sweater may use the undercoat fiber from about four goats. [4] Because the amount harvested is small and it takes effort to comb and collect the wool, cashmere is a high-cost fiber. China and Mongolia are major centers of cashmere production. [4]

5. Rayon and Nylon: How the First Chemical Fibers Were Made

Rayon is often called "artificial silk" because it has a shine similar to silk. In the late 19th century, a French chemist named Chardonnet succeeded in making this fiber by treating plant-derived cellulose with nitric acid. [8] However, this method had a weakness: the fiber was flammable. Later, a different method called the viscose process was invented, and this version became widespread. These fibers are collectively called rayon, a type of regenerated fiber. [5]

In 1935, a research team led by chemist Wallace Carothers at the DuPont company in the United States invented nylon. It was the world's first synthetic fiber, made entirely through chemical synthesis using coal, water, and air as raw materials. [6] DuPont advertised it as "stronger than steel and finer than spider silk." Nylon stockings released in 1940 became a huge hit, selling 64 million stockings in one year. [6]

6. Polyester and Other Chemical Fibers in Today's Clothes

Today, many clothes around the world are made from chemical fibers like polyester. This is because they are cheap, resistant to wrinkles, and easy to mass-produce. [3]

However, recent studies have found that washing clothes made from chemical fibers releases tiny, invisible plastic particles called microplastics into the drainage system. Because of this, the way we choose clothing materials, from natural fibers to chemical ones, is being reconsidered from an environmental perspective.

7. Checking Clothing Tags to Find Out What Your Clothes Are Made Of

You can explore these materials further by looking at the tags on the clothes in your home with an adult. Collect tags from your clothes and see which materials are most common, such as cotton, wool, or polyester. [1]

You can also compare the texture. Touch a cotton shirt, a polyester shirt, and a wool sweater to feel the differences in texture and warmth. [3] If you go out, you can visit museums or archives to see displays of old textiles and spinning machines. You can also visit craft stores or fabric shops to touch samples of various fibers. [2]

It is helpful to write down one word or question that interests you, such as "What is the difference between Merino wool and regular wool?" This can be a starting point for further research. [4]

Sources

  1. Wikipedia "Cotton" https://ja.wikipedia.org/wiki/%E6%9C%A8%E7%B6%BF (Explains the origins of cotton cultivation and the invention of spinning machines during the Industrial Revolution.)
  2. Katakura Industries "History of Silk - Silk Story" https://www.katakura.co.jp/silk/story/index.html (Explains the origins of sericulture and the Silk Road by a silk fabric manufacturer.)
  3. Tokyo Cleaning Life Hygiene Cooperative Association "Warm Fiber: About Wool" https://www.tokyo929.or.jp/column/fiber/post_156.php (Explains the scale structure of wool, its insulation, and the mechanism of felting.)
  4. Wikipedia "Cashmere" https://ja.wikipedia.org/wiki/%E3%82%AB%E3%82%B7%E3%83%9F%E3%82%A2 (Explains the amount of undercoat harvested from Cashmere goats and the share of production regions.)
  5. Tokyo Cleaning Life Hygiene Cooperative Association "Chemical Fiber: About Rayon" https://www.tokyo929.or.jp/column/fiber/post_159.php (Explains the invention of rayon and Chardonnet's artificial silk.)
  6. Wikipedia "Nylon" https://ja.wikipedia.org/wiki/%E3%83%8A%E3%82%A4%E3%83%AD%E3%83%B3 (Explains the history of the invention of nylon, its release, and the huge success of stockings.)
  7. Wikipedia "Samuel Crompton" https://ja.wikipedia.org/wiki/%E3%82%B5%E3%83%9F%E3%83%A5%E3%82%A8%E3%83%AB%E3%83%BB%E3%82%AF%E3%83%AD%E3%83%B3%E3%83%97%E3%83%88%E3%83%B3 (Explains the invention of the spinning mule in 1779.)
  8. Wikipedia "Rayon" https://ja.wikipedia.org/wiki/%E3%83%AC%E3%83%BC%E3%83%A8%E3%83%B3 https://en.wikipedia.org/wiki/Rayon (Explains Chardonnet's nitration method, the subsequent invention of the viscose method, and the flammability of the nitration method.)