Polyamides (PA)

Polyamides (PA) are semi-crystalline polymers. A distinction is made between two types. Polyamides made of one basic material (e.g. PA 6) and polyamides, which are made of 2 basic materials (e.g. PA 66). Polyamides have very good mechanical properties, are particularly tough and have excellent sliding and wear characteristics. Properties vary from the hard and tough PA 66 to the soft and flexible PA 12. Depending on the type, polyamides absorb different amounts of moisture, which also affect the mechanical characteristics as well as the dimensional accuracy.

When producing semi-finished products, a distinction is made between the extrusion and casting processes. The casting process allows the production of polyamide composite products with larger dimensions and a higher degree of crystallinity (mechanical strength), resulting in less internal tension. The extrusion process, however, is a more economical production process.

  • medium - high mechanical strength, hardness, rigidity, tenacity
  • high mechanical damping characteristics
  • good fatigue strength
  • very good wear resistance
  • good sliding properties
     


Ensinger offers the following polyamides:

TECAMID 6 (PA 6)

Polyamide 6 (PA 6) - TECAMID 6 - is the most common extruded polyamide and offers a balanced combination of all typical characteristics of this group of materials. Damping properties and impact strength of the material deserve to be emphasized as much as high tenacity even at low temperatures. Good abrasion resistance, particularly against sliding friction partners with rough surfaces, rounds off the overall picture.  Compared to the cast types, PA 6G - TECAST -, PA 6 has higher moisture absorption, is less wear resistant and is slightly less dimensionally stable.  There is also a limit to the size of semi-finished products and the unit weight which can be achieved due to the manufacturing process.

  • good mechanical strength
  • high impact strength
  • good damping characteristics
  • good sliding properties
     

TECAST (PA 6 C)

Cast polyamides (PA6 G) – TECAST – are highly molecular highly crystalline polymers. Semi-finished products or castings are manufactured using a casting method, whereby the raw material Caprolactam polymerizes by means of a controlled chemical reaction.

By using additives such as oil, solid lubricants or thermal stabilizers, the typical characteristics of cast polyamide can be selectively adjusted for certain applications, opening up a custom tailored range of materials to cover a wide application spectrum.

  • Almost free of internal stress
  • High degree of crystallinity
  • Toughness at high levels of hardness
  • Good abrasion resistance
  • Good damping properties
  • Easily processed
  • Can be manufactured in wide-ranging casting weights and dimensions
     

TECARIM (PA 6 C)

TECARIM is the Ensinger trade name for the product group of tough, highly resistant polyamide 6-block co-polymers manufactured using the reaction injection moulding process from Nyrim.

This method provides a particularly suitable option if the piece numbers are too large to permit manufacture by machining and where an excessive wall thickness precludes the use of injection moulding. The products offer a whole range of benefits:

  • Balanced toughness and rigidity
  • Capacity for hardness level adjustment
  • Extremely high impact strength, also down to -40°C
  • Good abrasion and wear resistance
  • High energy and shock absorption
  • No brittle fractures under pressure or impact loads
  • No flow lines in the component
  • Extreme wall thickness variations can be realized in the moulded component
  • Problem-free integration of inserts and reinforcement materials
  • Stress and draft-free moulded components
  • Moulded component weights from 0.5 kg to 18 kg
  • Realization of complex, sophisticated moulded components
     

TECAMID 66 (PA 66)

Polyamide 66 (PA 66) - TECAMID 66 - has good rigidity, hardness, abrasion resistance and thermal dimensional stability. With respect to these particular aspects, PA66 offers certain advantages compared to PA 6. Compared to the cast types, PA 66 has higher moisture absorption. With regard to all other characteristics, PA 66 is comparable to the standard cast type PA 6 G, but more expensive. 

  • good mechanical strength
  • high impact strength
  • good damping characteristics
  • good resistance to wear
     

TECAMID 12 (PA 12)

Polyamide 12 (PA 12) - TECAMID 12 – is a semi-crystalline polyamide with very high toughness and good chemical resistance. Of all the polyamides, TECAMID 12 is characterized by the lowest water absorption. It also has good impact resistance.

  • Lowest water absorption
  • Very good impact resistance and notched impact resistance
  • Good chemical resistance
  • Very good stress cracking resistance
  • Good sliding properties

TECAMID 46 (PA 46)

Polyamide 46 (PA 46) - TECAMID 46 – is a semi-crystalline thermoplastic with very high thermal dimensional stability. At high temperatures, the material offers substantial benefits over other polyamides in respect of its mechanical properties and creep / fatigue resistance. The material is consequently suitable for applications involving sliding and wearing parts exposed to high temperatures.

  • High thermal dimensional stability
  • High rigidity and strength also at high temperatures
  • Good creep resistance
  • Good chemical resistance