What is the difference between nylon staple fiber and polyester fiber

  1. Chemical properties
  Ingredients
  Nylon staple fiber: also known as polyamide fiber, is made of a polymer compound containing amide bonds (-CONH-).
  Polyester fiber: a synthetic fiber obtained by spinning polyester made by chemical polycondensation of organic dibasic acids and diols.
  Molecular structure
  Nylon staple fiber: The molecular chain contains a large number of amide bonds, which make nylon have a higher polarity and stronger intermolecular forces.
  Polyester fiber: The molecular structure is relatively regular, mainly connected by ester bonds (-COO-), and the intermolecular forces are relatively weak.
  2. Physical properties
  Strength
  Nylon staple fiber: It has high strength and excellent wear resistance. Its strength is slightly higher than that of polyester fiber, and it is suitable for applications that require high strength, such as industrial ropes, car seat belts, etc.
Polyester fiber: It also has high strength, but slightly lower than nylon staple fiber. However, the strength of polyester fiber is relatively stable in both dry and wet states.
  Elasticity
  Nylon staple fiber: It has good elasticity and resilience, and can quickly return to its original state after being subjected to force. This makes the fabric made of nylon staple fiber have good shape retention and is not easy to deform.
  Polyester fiber: It has relatively poor elasticity, but its wrinkle resistance is good. Fabrics made of polyester fiber can still maintain good flatness after being folded or squeezed many times.
  Hygroscopicity
  Nylon staple fiber: It has good hygroscopicity and can absorb a certain amount of moisture, making the wearer feel more comfortable. However, nylon staple fiber is easy to breed bacteria in a humid environment and needs to be maintained.
  Polyester fiber: It has poor hygroscopicity and is not easy to absorb moisture, so it can also maintain a good dry state in a humid environment. However, this also makes the fabric made of polyester fiber feel stuffy when worn.
  Specific gravity
  Nylon staple fiber: It has a lighter specific gravity and the fabric made is lighter.
  Polyester fiber: It has a relatively large specific gravity and the fabric will be slightly thicker.
  Dyeability
  Nylon staple fiber: It has good dyeing performance and can be dyed with a variety of dyes, and the colors are bright and strong.
  Polyester fiber: Dyeing is relatively difficult, requiring the use of specific dyes and dyeing processes, and the color after dyeing may not be bright enough.
  3. Uses
  Textile field
  Nylon staple fiber: commonly used in sportswear, outdoor clothing, underwear, etc. Due to its high strength, wear resistance and good elasticity, it is suitable for clothing that requires frequent activities and is subject to friction.
  Polyester fiber: widely used in various clothing fabrics, such as shirts, pants, dresses, etc. Its wrinkle resistance and stability make clothes made of polyester fiber easy to take care of.
  Industrial field
  Nylon staple fiber: can be used in industry to make ropes, fishing nets, conveyor belts, etc. Its high strength and wear resistance enable it to withstand greater tension and friction.
  Polyester fiber: can be used to make packaging materials such as polyester film and plastic bottles, as well as automotive interiors, building materials, etc.
  4. Price
Generally speaking, the price of nylon staple fiber is relatively high, while the price of polyester fiber is relatively low. This is mainly due to the high production cost of nylon staple fiber and its superior performance.