Moldability of SUMIKAEXCEL PES

General Feature

The moldability of SUMIKAEXCEL PES improves tremendously with increaseing in the cylinder temperature, the injection pressure and the wall thickness of molding. The tool temperature does not significantly affect moldability. However, as SUMIKAEXCEL PES has a high glass transition temperature of 225 deg C, it is recommended that the tool temperature is set to 160 deg C or higher. At low tool temperature, additional attention should be paid to avoid mold release defects. Especialy in glass fiber reinforced grade, low tool temperature is easy to be a cause of rough surface of the moling.

Standard Molding

This section describes the moldability characteristics of moldings of SUMIKAEXCEL PES that have a wall thickness of 3 mm.

Effects of Cylinder Temperature

If the cylinder temperature is raised, the melt viscosity of the resin will decrease, and improved the moldability. Raising the cylinder temperature by 20 deg C will improve the bar flow length by 30 - 60%.

Figure 1 Temperature Dependence

Figure 1 Temperature Dependence
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 12 (medium speed)
Molding : 3mmt×8mmw
Tool Temperature: 120 deg C

Effects of Injection Pressure

Increasing the injection pressure 20 MPa will improve the bar flow length by 10 - 20%. In general, it is recommended that high-pressure molding be utilized. However, it is necessary to ensure that mold release defects do not occur due to overcharging, and careful attention must be taken to preventing the buildup of residual stresses. Furthermore, the secondary pressure must be set in order to ensure the selection of appropriate conditions.

Figure 2 Injection Pressure Dependence (4100G)

Figure 2 Injection Pressure Dependence (4100G)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 9 (medium - high speed)
Resin temperature : 330 deg C、350 deg C
Molding : 3mmt×8mmw
Tool Temperature: 120 deg C

Effects of Injection Speed

The injection speed does not affect the bar flow length.

Figure 3 Injection Speed Dependence (4100G)

Figure 3 Injection Speed Dependence (4100G)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Molding : 3mmt×8mmw
Tool Temperature: 120 deg C

Effects of Product Wall Thickness

The flow length is rapidly improved by increasing of products wall thickness. In case of over 1.5mm thickness of wall, the moldability will be improved by 40 - 70% for each 0.5 mm increase in wall thickness.

Figure 4 Effects of Wall Thickness (4100G) on Moldability

Figure 4 Effects of Wall Thickness (4100G) on Moldability
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 60%
Resin temperature : 360 deg C
Molding : 8mmwBar Flow
Tool Temperature : 120 deg C

Thin Wall Molding

This section describes the moldability characteristics of moldings the characteristics of moldability of SUMIKAEXCEL PES in very thin wall thickness (0.1-0.7mm).

Effects of Cylinder Temperature

The moldability is improved with increasing the cylinder temperature. However, this effect is smaller for moldings having a wall thickness of 0.3 mm or less. 380 deg C cylinder temperature is appropriate in order to avoid the influence of resin residue.

Figure 5 Cylinder Temperature Dependence of Bar Flow Length (0.7 mm)

Figure 5 Cylinder Temperature Dependence of Bar Flow Length (0.7 mm)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 75%
Molding : 0.7mmt×8mmw
Tool Temperature : 140 deg C

Figure 6 Cylinder Temperature Dependence of Bar Flow Length (0.5 mm)

Figure 6 Cylinder Temperature Dependence of Bar Flow Length (0.5 mm)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 75%
Molding : 0.7mmt×8mmw
Tool Temperature : 140 deg C

Figure 7 Cylinder Temperature Dependence of Bar Flow Length (0.3 mm)

Figure 7 Cylinder Temperature Dependence of Bar Flow Length (0.3 mm)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 75%
Molding : 3mmt×8mmw
Tool Temperature : 120 deg C

Effects of Wall Thickness of Moldings

The moldability of SUMIKAEXCEL PES depends upon the wall thickness of the molding.

Figure 8 Wall Thickness Dependence (4100G)

Figure 8 Wall Thickness Dependence (4100G)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 75%
Molding : χmmt 8 mmw
Tool Temperature : 140 deg C

Figure 9 Wall Thickness Dependence (3601GL20)

Figure 9 Wall Thickness Dependence (3601GL20)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 75%
Molding : χmmt 8 mmw
Tool Temperature : 140 deg C

Effects of Injection Pressure

The injection pressure has a relatively large effect on the moldability of thin-walled SUMIKAEXCEL PES products. The injection pressure of 130 MPa or greater is recommended. As well, the appropriate pressure must be selected with due consideration for product appearance and the prevention of residual stresses.

Figure 10 Injection Pressure Dependence (4100G)

Figure 10 Injection Pressure Dependence (4100G)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130 MPa
Injection Speed : 75%
Resin temperature : 340 deg C
Molding : χmmt 8 mmw
Tool Temperature : 140 deg C

Figure 11 Injection Pressure Dependence (3601GL20)

Figure 11 Injection Pressure Dependence (3601GL20)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130 MPa
Injection Speed : 75%
Resin temperature : 340 deg C
Molding : χmmt 8 mmw
Tool Temperature : 140 deg C

Effects of Injection Speed

The injection speed has only minimal effects on the moldability of thin-walled SUMIKAEXCEL PES products. If the injection speed is excessively high, defects such as "burning" may occur.

Figure 12 Injection Speed Dependence (4100G)

Figure 12 Injection Speed Dependence (4100G)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Molding : χmmt 8 mmw
Tool Temperature : 120 deg C

Figure 13 Injection Speed Dependence (3601GL20)

Figure 13 Injection Speed Dependence (3601GL20)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Resin temperature : 340 deg C
Molding : χmmt 8 mmw
Tool Temperature : 140 deg C

Effects of Tool Temperature

The tool temperature has only minimal effects on the moldability of thin-walled SUMIKAEXCEL PES products. However, as SUMIKAEXCEL PES has a high glass transition temperature of 225 deg C, it is recommended that the tool temperature be set to 160 deg C or higher. When the tool temperature is low, additional precautions must be taken to prevent the occurrence of mold release defects. When glass fiber reinforced grades are molded, low tool temperatures may cause low weld strength or surface roughness of products.

Figure 14 Tool Temperature Dependence (4100G)

Figure 14 Tool Temperature Dependence (4100G)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 75%
Resin temperature : 340 deg C
Molding : χmmt 8 mmw

Figure 15 Tool Temperature Dependence (3601GL20)

Figure 15 Tool Temperature Dependence (3601GL20)
Molding Machine : Neomat N47 / 28, manufactured by Sumitomo Heavy Industries, Ltd.
Injection Pressure : 130MPa
Injection Speed : 75%
Resin temperature : 360 deg C
Molding : χmmt 8 mmw

Viscosity Characteristics

The apparent melt viscosities are as follows:

Figure 16 Resin Temperature Dependence of Apparent Melt Viscosity

Figure 16 Resin Temperature Dependence of Apparent Melt Viscosity

Figure 17 Shear Rate Dependence of Apparent Melt Viscosity

Figure 17 Shear Rate Dependence of Apparent Melt Viscosity
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