Polyamide fabric, also known as nylon fabric, is a form of plastic. Polyamide fabric, like polyester fabric, is a polymer. It is manufactured through a chemical process. In short, high amounts of heat and pressure are applied to fossil fuels to yield sheets of polyamide and nylon. Unfortunately, they are really high amounts of heat and pressure (energy) and polyamide fabric isn’t the only thing produced from this process.
how is polyamide fabric (nylon fabric) made?
The process begins with carbon-based (organic) chemicals, usually coal or petroleum. Certain polyamides can be produced from renewable carbon-based chemicals such as castor oil. In this case, organic means that the substance contains carbon. It isn’t the type of ‘organic’ label you see in the grocery store.
Heat and pressure are applied to the organic chemical to polymerize two large molecules found within it. These molecules are adipic acid and hexamethylenediamine. Polymerization is a chemical reaction in which smaller molecules combine to form a larger molecule. The structures of the smaller molecules are still present in the larger, resulting molecule. For example, our adipic acid = A and hexamethylenediamine = H. The chemical process adds these two together (A+H+A+H+A+H) resulting in a polymerized product (AHAHAH). So A+H doesn’t produce K, but AH.
The polymerization of these two molecules produces the nylon in the form of large ribbons or sheets. Then, these ribbons and sheets are shredded down to chips. If the nylon fiber’s final purpose is to become a textile, the chips are melted down and then forced through spinnerets to create fibers. Spinnerets are kind of like noodle makers for plastic polymer solutions. The polymer solution is pushed through holes in the spinneret to form a fiber in the desired form. Different spinnerets create hollow fibers, solid fibers, thinner fibers, etc. Finally, the fibers are spun into threads and knit into the textile known as polyamide nylon fabric.
how much energy does it take to produce nylon fiber?
The production of nylon fiber uses 250 megajoules of energy for every 2.2 pounds (or 1 kilogram) of fiber produced.
A megajoule – that sounds cool! But what does it mean? Let’s put it in perspective.
A joule is a unit of energy and 1 megajoule = 1 million joules. One million joules is the amount of kinetic energy that something weighing 1 megagram (1 tonne/2204.62 lbs) has traveling at 99.4 mph (160 km/h).
So, it would take the energy of 250 elephants each weighing in at 1 tonne and each traveling at 99 mph to create just 2.2 lbs (1 kg) of nylon fiber. Needless to say, that’s a lot of energy and a little yield.
The amount of energy it takes to create nylon fiber is twice as much energy as used to produce polyester fiber (125 MJ/kg) and nearly five times as much energy as used to process cotton fibers (55 MJ/kg). Keep in mind, this is only the amount of energy that goes into creating nylon fiber. The product is not yet to its final nylon fabric form.
the properties of nylon & polyamide fabric
Depending on finishing processes to the textile, polyamide fabric can be very stretchy. Nylon fabric can also have a wide variety in finishes and luster. Depending on processing, nylon can be anywhere from dull to incredibly lustrous (shiny). However, nylon fabric also has a tendency to pill easily, attract surface soil, and create static cling. It also contributes to plastic pollution in waterways. When an article of nylon clothing goes through a laundry cycle, it can release 19,000 plastic microfibers into the water.
what impact does polyamide fabric have on the environment?
Unfortunately, the process to create nylon fabric is not as green as a herd of elephants running at impossible speeds. The manufacturing process releases nitrous oxides into the atmosphere as waste. Nitrous oxide (N2O) is a considerably powerful greenhouse gas and contributes to the depletion of stratospheric ozone. Nitrous oxide has a lifetime of 150 years in our atmosphere and thus accumulates. Gases created during nylon production account for one tenth of the increase of N2O in our atmosphere. Consequently, nylon production has a high impact on the environment.
The negative effects of polyamide fabric production don’t end there. Exposure to the process of manufacturing nylon offers a host of problems for workers. The dust and fumes created as byproducts can cause irritation of skin, nose and throat, as well as mechanical irritation of the eye.
Additionally, since it is a synthetic fabric, nylon clothing has a tendency to grow odor causing bacteria. Because of this, the wearer may want to wash their nylon clothing more often. Unfortunately, there are some unforeseen environmental dangers lurking in our laundry. Nylon clothing is a contributor to the growing environmental threat of microfibers. Microfibers are tiny pieces of plastic that break off of clothing in the laundry, travel through the sewage lines, and end up in waterways, along shorelines, and spread on agricultural crops. From there, these plastic microfibers can end up in our food, lungs, fish, birds, our stomachs, the whole deal. Learn more about microfibers and simple ways you can act to reduce them here.
how to clean nylon & polyamide clothing
Nylon clothing does not hold up incredibly well through the wash. You should limit how often you wash nylon fabric to increase the garment’s lifespan. Most care tags recommend that you wash nylon clothing on cold cycles, with gentle detergent, and drip dry. This is because nylon clothing will melt when exposed to high temperatures or caustic cleaning products.
So, nylon clothing has a tendency to dirty quickly, but pills when washed often. This makes nylon products have a shorter product life (think of how quickly your tights run, they’re most likely nylon). Because of these properties, nylon clothing will spend a shorter time in your wardrobe and a much longer time in the landfill. Nylon products take about 30-40 years to decompose.
For some longer lasting, cleaner, and more eco friendly alternatives to polyamide fabric, check out the natural fiber fabrics here.
what is the difference between polyamide fabric, nylon fabric, and polyamide fiber?
If you see ‘polyamide fabric’ on your fabric composition care tag, it’s referring to nylon fabric. Nylon is a generic term for a group of plastics made of synthetic polyamide fibers. You can read about how nylon fabric (polyamide fabric) is made above.
There are, in fact, some polyamide fibers that are not synthetic. The term ‘polyamide fiber’ refers to a fiber made of linear macromolecules with recurring peptide bonds. At least 85% of these bonds join to aliphatic or cycloaliphatic units. For those of us who don’t speak science, the term defines a pretty broad range of fibers, some of which occur naturally. Proteins, including silk and wool, are an example of a naturally occurring polyamide fiber. But again, when polyamide is listed in the fabric composition of a garment, it’s referring to the synthetic fiber that is nylon plastic.