Temperature dependence

Table 2: TOYOLAC™ Mold shrinkage Rates
Molding temperature Measurement dimension TOYOLAC™
250		 TOYOLAC™
500		 TOYOLAC™
700		 TOYOLAC™
100		 TOYOLAC™
300
230°C Transverse direction Dimension A 0.44% 0.44% 0.46% 0.47% 0.52%
Dimension B 0.50% 0.49% 0.52% 0.53% 0.55%
Machine direction C 0.47% 0.47% 0.49% 0.50% 0.57%
250°C Transverse direction Dimension A 0.47% 0.47% 0.49% 0.50% 0.56%
Dimension B 0.54% 0.53% 0.55% 0.47% 0.59%
Machine direction C 0.50% 0.50% 0.52% 0.54% 0.61%

* Dimensions were measured after allowing the product to sit for 24 hours at 23°C/50%RH.

Molding conditions

Figure 2: Sample shape and measurement dimensions (mm)

Figure 2: Sample shape and
measurement dimensions (mm)

  • Molding temperature:230°C
  • Mold temperature:60°C
  • Injection speed: Medium (FCV scale B-O) (Fill-in time: 2.0 seconds)
  • Holding time: 13 seconds
  • Cooling time: 30 seconds
  • Back pressure: 0.98Mpa
  • Screw rotation: 53r/min
  • Injection pressure: Find the lowest pressure at which resin fills the cavity, then add +0.98MPa
  • Sample dimensions: 127×76×3mmt

Spiral Flow Length

Molding conditions

Figure 3: Relationship between cylinder temperature setting and spiral flow length of TOYOLAC™

Figure 3: Relationship between cylinder temperature
setting and spiral flow length of TOYOLAC™

  • Molding machine: Toshiba IS-50
  • Mold: Spiral flow 10w×2mmt
  • Injection speed: B-10 (medium speed)
  • Molding cycles: 15/20sec.
  • Screw back pressure: 0.98Mpa
  • Screw rotation: 53r/min
  • Mold temperature: 60°C

Temperature dependence of flexural modulus

Figure 4: Temperature dependence of flexural modulus in TOYOLAC™

Figure 4: Temperature dependence of flexural
modulus in TOYOLAC™

Temperature dependence of Izod impact strength

Figure 5: Temperature dependence of Izod impact strength in TOYOLAC™

Figure 5: Temperature dependence of Izod impact
strength in TOYOLAC™