injection molding fault and prevention(17)

塑料成型

8. Microcracks, crazing and stress whitening

Fig.8.1:Microcracks produced by overloading and deforming under residual pressure

a)

b)

Fig.8.2:

a) Ballpoint pen with stress whitening in the thread region(undercut) made from pure polybutadiene ABS

b) The same ballpoint pen without stress whitening made from Terluran 877 T

Fig.8.3:Terluran 900-series (967 K)

Terluran 877 T

17

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