Moldability of SUMIKASUPER LCP

Figure 1 and Figure 2 shows the shear rate dependence and the temperature dependence, respectively, of the apparent melt viscosity, for SUMIKASUPER LCP products. As compared to other engineering plastics, SUMIKASUPER LCP possess both high temperature dependence and high shear rate dependence, apparent melt viscosity. Under the appropriate injection molding conditions, these products exhibit low viscosity.

Figure 1 : Shear Rate Dependency of Apparent Melt Viscosity

Figure 1 : Shear Rate Dependency of Apparent Melt Viscosity

Figure 2 : Temperature Dependency of Apparent Melt Viscosity

Figure 2 : Temperature Dependency of Apparent Melt Viscosity

The moldability of each grade was measured, using the mold shown in Figure 3. Figure 4 depicts the thin-wall section moldability (thickness of 0.2, 0.3mm) for each grade and Figure 5 indicates the bar flow length 1mm thickness.

Figure 3 : Mold for Thin-wall Flow Length Measurement

Figure 3 : Mold for Thin-wall Flow Length Measurement
Specimen thickness : 0.3mm
Runner : 4.0mmΦ
Gate : 0.3t×1.5w×2.0L
Flow length is the average of 4 cavities.
Specimen thickness : 0.2mm
Runner : 3.0mmΦ
Gate : 0.2t×1.5w×2.0L
Flow length is the average of 4 cavities.

Figure 4 : Thin-wall Moldability

Figure 4 : Thin-wall Moldability

Figure 5 : Flow length of Various Types of Engineering Plastics

Figure 5 : Flow length of Various Types of Engineering Plastics
Molding machine : Nissei Jushi Kogyo PS10E1ASE
Injection pressure : 0.2mmt : 90MPa
0.3mmt : 60MPa
Injection speed : 0.2mmt : 95%
0.3mmt : 60%
Mold temperature : 130 deg C
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