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Melt Spinning Technical Service

Melt spinning technology is a chemical fiber spinning method in which the polymer is heated and melted, extruded through the spinneret, and cooled and solidified in the air to form fibers. Alfa Chemistry has a mature melt spinning process and technology, and can provide you with related spinning services upon request. Our fiber manufacturing division has a strong infrastructure and a team of well-trained and experienced experts.

Application Scope

The polymers used for melt spinning must be able to melt into a viscous flow state without significant decomposition. That is, the fiber-forming polymer that has a melting point below the decomposition temperature and can be melted to form a thermally stable melt can be formed by this method. For example, polyester fibers, polyamide fibers, and polypropylene fibers can all be produced by melt spinning.

In addition, melt spinning techniques are also suitable for the preparation of blended fibers with multiple components, starting with suitable polymers as raw materials. For example, polylactic acid (PLA) and polybutylene succinate (PBS) can be used to prepare blended fibers by solution spinning techniques. Studies have shown that the addition of a certain amount of PBS can enhance the elasticity of PLA/PBS blend fibers. [1]

PLA:PBS blends fibers for melt spinning technique.PLA:PBS blends fibers for melt spinning technique.

Process Flow

Melt spinning techniques include direct spinning and chip spinning. The former is suitable for large-scale industrial production of fibers, but it is difficult to produce differentiated fiber varieties. The latter is suitable for producing small batches of differentiated fibers with high added value. The process flow of melt spinning technology roughly includes the following important steps [2]:

Process Flow

  • Preparation of spinning melt
  • Formation of melt stream
  • Formation of spun fibers (the melt stream is elongated and solidified by cooling)
  • Post-processing (oiling and winding of solid strands)

Spinning Characteristics

  • High spinning speed (1000~7000m/min)
  • No solvent and precipitant required
  • Simple equipment
  • Short process flow

Influencing Factors

Spinning technology has a certain degree of influence on the structure and even properties of fibers. In general, the resulting fiber structure is a function of spinning speed, drawing mechanism, heat-setting conditions, and so on. The stress-strain behavior of the material is also a function of spinning speed, as the fiber structure develops with increasing spinning speed because of polymer chain orientation and crystallization.

Cooperate With Us

  • Experienced testing and research team
  • Meet customer needs at all stages
  • Efficient and cost-effective services
  • Complete and advanced infrastructure

Research And Application

In addition to conventional fiber production applications, in some advanced researches, melt spinning technology is often used as a means of preparing advanced functional materials. For example, Henriette Probst et al. used a modified melt-spinning technique to prepare high-stretch conductive filament yarns with thermoplastic polyurethane (TPU) and conductive carbon nanotubes (CNT) composites as substrates. [3]

The modified melt spinning technology.The modified melt spinning technology.


  1. Lalita Jompang, et al. Energy Procedia, 2013, 34, 493-499.
  2. H.Qu, et al. Electronic Textiles, Smart Fabrics and Wearable Technology, 2015, 21-53.
  3. Henriette Probst, et al. Polymers, 2021, 13(4), 590.

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