PA6: Polyamide 6

Short Name
Polyamide 6
ETP - Engineering Thermoplastics
General Properties
Chemical Formula
Structural Formula


Glass Transition Temperature
45 to 80 °C
Melting Temperature
225 to 235 °C
Melting Enthalpy
190 J/g
Decomposition Temperature
445 to 460 °C
Young's Modulus
2800 MPa
Coefficient of Linear Thermal Expansion
80 to 90 *10¯6/K
Specific Heat Capacity
1.59 to 1.70 J/(g*K)
Thermal Conductivity
0.22 to 0.33 W/(m*K)
1.12 to 1.15 g/cm³
Semi-crystalline thermoplastic
General properties
Good mechanical strength. High wear resistance. High impact strength. Good damping behavior. Good sliding properties
Injection molding, extrusion, blow molding, melting
Textiles (fibers). Mechanical engineering (gear wheels, screws, slide bearings…)

Internet Links

NETZSCH Measurements

DSC 204 F1 Phoenix®
Sample Mass
10.73 mg
Isothermal Phase
5 min
Heating/Colling Rates
10 K/min
Al, pierced
N2 (50 ml/min)


The as-received PA6 granulate was highly amorphous, as demonstrated in the 1st heating (blue) by a glass transition with a high Δcp (0.16 J/(g.K) at 36°C) and post-crystallization at 190°C. In the temperature range between approx. 70°C and 150°C, a broad, flat peak can be seen, probably due to evaporation of water, which is responsible for the positive shift in the glass transition temperature of around 15 K between the 1st and 2nd heating.
After controlled cooling, a multiple structured melting peak, indicating several melting phases, was observed in the 2nd heating (green). The temperature of the main peak occurred at 223°C, within the range typical for PA6.

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