Courses for Kids
Free study material
Offline Centres
Store Icon


Last updated date: 23rd May 2024
Total views: 328.2k
Views today: 7.28k
hightlight icon
highlight icon
highlight icon
share icon
copy icon

Polyamide Meaning

In the year 1938, an American chemical corporation named DuPont commercially produced a polyamide for the first time during the first World War.

Polyamide is a polymer that comprises repeated units linked together by amide bonds. Polyamides are naturally occurring; however, we can obtain them artificially as well.

Natural polyamides are proteins, such as wool and silk, while artificial are nylons, aramids, and sodium poly-aspartate. 

A polyamide is made by forming an amide function to link two molecules of monomer together. 

The two types of polyamides are Polyamide, PA  - 6, 11, 12, and 66, where each has its own abilities, which we will understand on this page. 

Further, we will understand polyamide structure, polyamide properties, and polyimide amide.

What is Polyamide?

A polyamide (noun) is a synthetic polymer. It is made by the linkage of an amino group of one molecule and a carboxylic acid group of another. It includes synthetic fibre such as nylon.

Wide use of synthetic polyamide is found in the kitchen, textile, and automobile industries because of its strength and durability.

We Find the Use of Polyamide in the Following Places:

  • Parachutes

  • Gun parts

  • Umbrellas

  • Fishing nets

  • Tires

  • Seat belts

  • Sleeping bags

  • Tents

  • Ropes

  • Tennis rackets

  • Machine gears, etc

Polyamide Structure

The polyamide structure looks like the following:

[Image will be Uploaded Soon]

In today’s world, manufacturers and engineers frequently need a material that is lightweight and flexible than metal, further providing durability and protection. 

Polyamide works as an outstanding solution. Its durability, convenience, reliability, and cost-effectiveness make it a mainstay in product manufacturing across various industries.

A polyamide structure carries various properties with itself; let’s understand these in detail:

Polyamide Properties

Polyamide carries several physical properties that make it suitable for various applications:

  1. Abrasion Resistance or Scraped Spot Obstruction: Polyamide is exceptionally impervious to the scraped area and wear. This quality makes it outstandingly strong in high-contact zones. 

  2. Chemical Resistance or Substance Opposition: Cast polyamides offer powerful protection from synthetics, so they give better security than wires and links in harsh conditions. 

  3. Corrosion Resistance: Polyamide gives successful corrosion against caustic materials. Polyamides are ideal for cruel settings — chemical preparing facilities, processing plants, refineries, wastewater treatment plants — that would corrode metals after a couple of years. 

  4. Electromagnetic Obstruction: Some uniquely designed polyamides, for example, the sort utilized in our ROHRflex conductors, offer electromagnetic (EMC) safeguarding for sensitive applications. 

  5. Flexibility and Adaptability: Polyamides were explicitly produced for excellent adaptability. This adaptability makes polyamide items advantageous to move, curve and fit into squeezed spaces, and it considers get together and establishment in places that couldn't oblige unbending metal constructions. Polyamide will stay adaptable even after extensive stretches of utilization or openness to outrageous temperatures. 

Polyamide Essential Properties 

  1. Fire Obstruction: Polyamides' wide temperature range - aliphatic polyamides ordinarily soften at around 500 to 550 K - gives them solid warmth opposition. They oppose bursting into flames and produce little smoke when they do. A few polyamides can self-stifle blazes in the event that they burst into flames. 

  2. Low thickness: Nylon polyamide has a thickness of about 1.31 g/cm3

  3. Lightness/Daintiness: Polyamide's low density/thickness makes it an amazingly lightweight material. Its gentility makes it simple to art, move, and introduce. 

  4. Strength: When they find out about its mind-blowing adaptability and daintiness, a few groups wonder — is polyamide solid? Polyamide gives particularly high elasticity and prevalent effect opposition. 

For example, strength tests have shown that albeit a forklift can squash a polyvinyl chloride (PVC) - jacketed metallic conductor framework and puncture its protection, a polyamide framework effectively opposes penetrating and withstands even hefty forklift pressure. 

  1. Uv Light Resistance/Bright Light Opposition: However bright (UV) light can harm a few materials, polyamide opposes its crumbling impacts. It can perform well in daylight for quite a long time.

Difference Between Nylon and Polyamide

Both polyamide and nylon are polymers and are classified as plastics. However, there lies a thin line difference between the two:

Nylon was named by DuPont after its first successful commercial production as a synthetic thermoplastic polymer. The name Nylon was copied from the suffixes of two fibres such as cotton and rayon.

Its original name was intended to be "No-Run" which stands for unraveling/unwind. Later, the name was changed to "Nuron", then again to "Nilon", and finally to Nylon to clarify the pronunciation.

However, by the definition, polyamide is a polymer of amino acids that can be both natural and artificial. Also, polyamide fabric is a material composition that refers to nylon fabric, and therefore, it is completely synthetic.

Nylon and polyamide are used interchangeably in general and mean the same thing, especially in the apparel and the textile industry.

A Polyamide Polymer has the Following Four Categories:

Polyamide 6 or PA - 6

Polyamide 11 or PA - 11

Polyamide 12 or PA - 12

Polyamide 66 or PA - 66

Where nylon 6 refers to Polyamide 6.

Polyamide Fabric

Polyamide fabric is a common term that we use to refer to versatile fabrics that are prepared from the strings of polyamide monomers. This fabric is a synthetic textile composed of petroleum-based plastic polymers. 

We find the versatile use of this material in many different applications today, such as clothing fabrics in the fashion industry.

Further, polyamide fabric is one of the most widely used synthetic fabrics today next to polyester. After its first discovery in the 1930s, it is widely used in designing various apparel brands for retailers.

Now, let’s have a look at the Polyamide fabric uses:

Polyamide Fabric Uses

Wide use of polyamide fabric is in the textile and apparel industry to make the following products:

  • Hosiery

  • Pants

  • Tights

  • Leggings

  • Stockings

  • Coats

  • Sweaters

  • Underwear

  • Sportswear

  • Swimwear

  • Fleece

  • Circular knits

  • Shoes

  • Accessories.

Furthermore, we find the use of polyamide fabric in creating cooking utensils, rugs, carpets, curtains, food packaging, outdoor furniture, industrial materials, and many other household textiles.

Point to Note:

Most often, polyamide fabrics are made of various material mixtures such as spandex, a.k.a elastane, or Lycra. However, polyamide fibre can be used alone.

Advantage and Disadvantage of Polyamide Fabric

We can produce polyamide fabric at a low cost. Also, it has fascinating properties to make cheap apparel and footwear. Its primary materials are petrochemicals, which are used to create wholly synthetic and affordable fabrics.

In contrast to natural fibers, like cotton and linen, the biggest advantage of polyamide fabric so far is its low cost.

Unfortunately, polyamide fabric is detrimental to the environment. Hence, to protect ourselves, animals, and plants, we must employ a natural polyamide fibre. 

Polyimide Amide

In the following text, you will understand what polyimide amide is, and how it is different from polyamide as well.

  1. Generally, polyamide comprises amide linkages in their backbone and is prepared by the polymerization between a diamine and dicarboxylic acid. 

Examples of Polyamide:

Natural  Polyamide - Proteins - wool, silk

Artificial Polyamide - Nylon, kevlar

  1. However, polyamides containing imide linkages in their backbone are synthesized by the polymerization between dianhydride and diisocyanate or diamine. 

An Example of Polyimide Amide:


A Polyimide amide structure looks like the following:

[Image will be Uploaded Soon]

Polyamide Advantages

  1. Assembly Time: Polyamide items are regularly a lot faster to gather than their rivals. They are less cumbersome and simpler to move, and they fit with frill-like connectors without any problem. While metal items are tedious to cut, polyamides take into consideration quick cutting and gathering. 

Collecting polyamide link security frameworks, for example, takes only one-fifth of the assembly time of PVC-jacketed metallic frameworks. 

  1. Cost-Adequacy: Polyamides are incredibly financially savvy. Since they are not difficult to ship, they cause fewer establishment costs than different materials, and they have generally low creation costs contrasted and metals. 

  2. Solidness: Polyamide's numerous obstruction properties make it exceptionally sturdy. It will keep going for quite a long time without requiring over-the-top upkeep. 

  3. Entrance Assurance: Polyamide gives a viable seal and won't spill. Dissimilar to materials like PVC and different plastics, it is additionally ugly to rodents since it doesn't safeguard aromas, so nuisances won't almost certainly be enticed to chew through it. 

Rat safe twisted sleeving is an especially valuable alternative for tending to bother issues. 

  1. Durability: For mechanical purposes, polyamide is frequently projected rather than woven. In the wake of projecting, offices can machine the cast pieces into different multifaceted parts. 

  2. Noise Dampening: Polyamide is a viable sound separator, so it settles on a fantastic decision for noisy settings where clamor decrease can help work with gainful work or limit disturbance to close inhabitants.

Do You Know?

Polyamide is also known as nylon. It refers to an entire group of plastics that are chemically linked with polyamides, akin to aramids and sodium Polyaspartates.

However, there is a narrow difference between polyamide and nylon, which we will discuss now.

FAQs on Polyamide

Q1: State the Industrial Applications of Polyamide.

Ans: Polyamide cable protection systems have a wide scope of industry applications past those that require cable protection. Some mechanical uses incorporate the accompanying: 

1. Automobile: In the auto business, polyamide regularly shapes air admission manifolds, motor covers, valve covers, and airbag holders, just as outside segments like handles, grilles, wheel covers, and fuel covers and tops. 

These segments once utilized metal, yet polyamide makes for lighter, more eco-friendly vehicles and reduces down creation expenses. 

2. Food and Beverage: The food and refreshment industry utilizes polyamide frameworks to advance great cleanliness in zones where parts may come into contact with food. These frameworks are normal in food-bundling zones and creation plants. 

3. Advanced Mechanics: Advanced mechanics require profoundly adaptable and sturdy parts, and polyamide gives viable arrangements. It is additionally helpful for wire and link assurance in advanced mechanics.

Q2: Explain the Two Types of Polyamides.

Ans: The two types of polyamides are as follows:

PA - 66: 

PA - 66 is the most common form of polyamide. DuPont originally patented this category. Polyamide 66 hails from the polyamide family of aliphatic polyamides.


Zytel is DuPont’s PA-66 brand name. It's a high-performance thermoplastic in terms of high strength, abrasion, and impact resistance.

Technyl is a plastic material from DOMO chemical substances. It's profoundly imaginative and seemingly perhaps the most supportable Dad 66 textures in its Technyl 4earth variant.

PA -  6:

The Second Form After Pa-66. Its Examples are”

Ultramid: It is a polyamide from BASF relying on PA 6. It is known for its high mechanical strength, stiffness, and thermal stability.

RadiPol is a PA-6 brand’s name by RadiciGroup. It is used in industrial yarn and textile fibers.