Annealing

Annealing is a temperature treatment which leads to the following:

  • Increases crystallinity to improve strength and chemical resistance.
  • Reduces internal stress, which can arise through extrusion or machining.
  • Increases dimensional stability over a broad range of temperatures.

When processing plastic semi-finished goods using machining processes it is recommended under certain circumstances, an annealing process is carried out after rough machining, in order to achieve the best dimensional stability and resistance.

The parameters given in the following annealing specification are approximate values and apply up to a wall thickness of 50 mm. For larger wall thicknesses please contact our technical marketing department.

Material

DIN Description

Heating-up phase

Maintaining phase**

Cooling down phase

TECASINT

PI

2 h to 160°C
6 h to 280°C

2 h at 160°C
10 h at 280°C

at 20°C/h to 40°C

TECAPEEK

PEEK

3 h to 120°C
4 h to 220°C

1,5 h
per cm wall thickness

at 20°C/h to 40°C

TECATRON

PPS

3 h to 120°C
4 h to 220°C

1,5 h
per cm wall thickness

at 20°C/h to 40°C

TECASON E

PES

3 h to 100°C
4 h to 200°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECASON P

PPSU

3 h to 100°C
4 h to 200°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECASON S

PSU

3 h to 100°C
3 h to 165°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECAFLON PVDF

PVDF

3 h to 90°C
3 h to 150°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECANAT

PC

3 h to 80°C
3 h to 130°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECAPET

PET

3 h to 100°C
4 h to 180°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECADUR PBT GF30

PBT

3 h to 100°C
4 h to 180°C

1 h
per cm wall thickness

at 20 °C/h to 40 °C

TECAMID 6

PA 6

3 h to 90°C
3 h to 160°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECAMID 66

PA 66

3 h to 100°C
4 h to 180°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECAFORM AH

POM-C

3 h to 90°C
3 h to 155°C

1 h
per cm wall thickness

at 20°C/h to 40°C

TECAFORM AD

POM-H

3 h to 90°C
3 h to 160°C

1 h
per cm wall thickness

at 20°C/h to 40°C

**at maximum temperature, unless otherwise specified.

Further modified or reinforced plastics are able to anneal according to the itemized natural material options.