LAPEX A   
POLYETHERSULPHONE (PES)

LAPEX A compounds are based on PES, an amorphous resin made by sulphuric groups, which colour is transparent amber.

Main properties
  • Excellent dimensional stability;
  • Excellent mechanical properties;
  • Excellent creep resistance;
  • Excellent toughness;
  • Good thermal properties (high C.U.T. and H.D.T. values);
  • Low flammability and poor smoke evolvement;
  • High hydrolysis resistance;
  • Good resistance to sterilization cycles;
  • Good electrical insulation.
Notes
LAPEX A compounds are suitable for applications that involve steam and hot water contact, thanks to their high hydrolysis resistance. LAPEX A compounds are also resistant to infrared radiation and microwaves.
Compounds also provide a good resistance to flame propagation without adding any specific additive.

Self-lubricating compounds
Family products with better self-lubricating properties are available by adding substances able to improve the tribological properties of the material. These grades are suitable for plastic-metal or plastic-plastic contact applications. Compounds able to fulfil specific requirements concerning wear resistance and friction factor can also be formulated. For more information, please check LATILUB grades.

Electrically partially conductive / dissipative grades
Family compounds can be formulated with partially conductive or dissipative properties, even in reinforced versions: search grades in LATIOHM product range.

E.M.I. shielding grades
Check LATISHIELD family for more information about products with E.M.I. shielding properties.

Moulding
Cracking or long-term rupture due to internal residual stresses can be found. In order to prevent or reduce such phenomena, careful part design and correct moulding process are required. Eventually, annealing parts at 140°C (1 hour per mm of wall thickness) allows reducing residual stresses.
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