Resin Process - The Importance of Temperature Control

Did you know that whether a plastic injection product is perfect or not has a lot to do with the temperature during the manufacturing process?


Plastic Injection Mold Resin

Resin is an important material for producing kayak accessories due to its durability and stability, making it an ideal choice for outdoor sports product components, even in rough water conditions.

▶ Injection Molding Process Temperature

Because resin absorbs moisture quickly, if it is not dried before the production process begins, the final products may have watermarks, spots, streaks, or bubbles. Therefore, drying the resin is an important step.

We have documented the suitable drying temperatures for various materials and provided them for your reference. Please see the table below:

Injection Molding Resin Drying Temperature
Resin Drying Temp (°F) Drying Time (hrs)
ABS 190 3-4
ABS/PC 220 3-4
Acetal(POM) 200 1-2
Acrylic 180 2-3
ASA 185 3-4
Nylon 180 4-5
Polycarbonate(PC) 250 3-4
PEEK 310 3-4
Polyester(PET) 260 2-3
PMMA 160 3-5
Polyarylate 250 5-6
Polyetherimide 310 4-5
Polyethylene(PE) 160 3-4
Polypropylene(PP) 70 1-2
Polyurethane(PU) 180 2-3
PVC 180 1-2
Polystyrene(PS) 180 1-2
TPE 210 2-3
TPR 160 2-3

Is it ready for production immediately after drying the material?  Not quite.

▶ Injection Molding Resin Drying Temperature

We also need to heat up the temperature of injection molding machine.
If we do not set the temperature correctly, it can affect the material itself. A process temperature that is too high could cause material decomposition, while too low temperature may prevent the resin from melting, leading to screw damage. Therefore, controlling the temperature of the machine and mold is also an essential part of the process.

Please refer to the temperature data below:

Injection Molding Process Temperature
Resin Melt Temp (°F) Mold Temp (°C)
ABS 440-540 90-180
Acetal (POM) 510-540 140-180
Acrylic 420-480 140-220
ASA 450-500 110-200
Nylon 6 470-530 120-250
Nylon 6/6 500-560 120-250
Polycarbonate(PC) 540-600 180-210
PEEK 650-730 250-300
Polyester(PET) 500-550 250-280
PMMA 360-500 120-160
Polyarylate(PAR) 640-700 250-280
Polyetherimide(PEI) 650-820 160-340
Polyethylene(LDPE) 340-440 50-100
Polyethylene(HDPE) 420-540 50-150
Polypropylene(PP) 420-520 60-150
Polyurethane(PU) 390-440 70-120
PVC 320-420 50-120
Polystyrene(PS) 360-530 100-150
TPE 340-390 60-140
TPR 370-410 60-160

▶ Conclusion

Thus, in injection molding, we need to control the temperature to produce the product perfectly. If the temperature is not controlled properly, defects will appear on the product.

Kayak Handle

Kayak Handles

KB3 Nylon Cord Hook

▲ KB8 Deck Line Guide - Slotted Round

We hope that this information can help you understand injection molding better. 
Please feel free to contact us if you have any other process control, mold design or other questions.

▶ Recommend Posts:

Plastic ​Injection Molding Defects and Solutions 

Contact Us.

Any Questions, any inquiries.

Contact Us