Sutai High-tech Materials Co., Ltd.

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Incontrast to the processes flaming and corona treatment of plastics, nearly allplastic surfaces can be pre-treated with fluorine. Since the activation takesplace due to the reaction of the fluorine with the plastic, the activation canbe controlled and reproduced easily via the fluorine concentration. Sincetreatment takes place at close to normal pressure, the fluorination alsoreaches deeper material layers. The pre-treatment effect is thereforelong-lasting. The concentration of active species is very well balanced: on theone hand it is high enough to achieve an excellent activation effect, whilst onthe other hand it is too low to damage the surface. The treatment will improvethe quality of coating, adhesive and printing for vehicle components.



Surface energies of selected  elastomers, untreated and fluorinated

Materials

Surface energy,
 untreated (mN/m)

Surface energy,
 treated (mN/m)

LDPE

32

54

PE-UHMW

37

54

PP

29

66

POM

40

72

PET

32

72

EPDM

40

58

PBT

30

72

PC

32

56

PPS

32

60

SI

32

54