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Plastic Material Melt & Mould Temperatures

Knowing the correct plastic material melt & mould temperatures is essential for all manufacturers. Injection moulding at the incorrect temperatures can have a significant impact on the final product, including the appearance & strength of the product. The table below demonstrates the optimal melt and mould temperature ranges of various plastic materials, to ensure product quality and manufacturing efficiency.

Plastic Material Melt & Mould Temperatures Table

MATERIAL MELT TEMPERATURE RANGE (℃) MOULD TEMPERATURE RANGE (℃) MELT TEMPERATURE RANGE (℉) MOULD TEMPERATURE RANGE (℉)
ABS 190-270 40-80 374-518 104-176
ABS/PC ALLOY 245-265 40-80 473-509 104-176
ACETAL 180-210 50-120 356-410 122-248
ACRYLIC 220-250 50-80 428-482 122-176
CAB 170-240 40-50 338-464 104-122
HDPE 210-270 20-60 410-518 68-140
LDPE 180-240 20-60 356-464 68-140
NYLON 6 230-290 40-90 446-554 104-194
NYLON 6 (30% GF) 250-290 50-90 482-554 122-194
NYLON 6/6 270-300 40-90 518-572 104-194
NYLON 6/6 (33% GF) 280-300 40-90 536-572 104-194
NYLON 11 220-250 40-110 428-482 104-230
NYLON 12 190-200 40-110 374-392 104-230
PEEK 350-390 120-160 662-734 248-320
POLYCARBONATE 280-320 85-120 536-608 185-248
POLYESTER PBT 240-275 60-90 464-527 140-194
PET (SEMI CRYSTALLINE) 260-280 20-30 500-536 68-86
PET (AMORPHOUS) 260-280 20-30 500-536 68-86
POLYPROPYLENE (COPOLYMER) 200-280 30-80 392-536 86-176
POLYPROPYLENE (HOMOPOLYMER) 200-280 30-80 392-536 86-176
POLYPROPYLENE (30% TALC FILLED) 240-290 30-50 464-554 86-122
POLYPROPYLENE (30% GF) 250-290 40-80 482-554 104-176
POLYSTYRENE 170-280 30-60 338-536 86-140
POLYSTYRENE (30% GF) 250-290 40-80 482-554 104-176
PVC P 170-190 20-40 338-374 68-104
PVC U 160-210 20-60 320-410 68-140
SAN 200-260 50-85 392-500 122-185
SAN (30% GF) 250-270 50-70 482-518 122-158
TPE 260-320 40-70 500-608 104-158

Further Considerations for Plastic Melt & Mould Temperatures

While understanding a plastic’s melting and moulding temperature is typically straight forward, there are other important factors to consider.

As plastic heats up and melts, thermal expansion causes it to occupy more space. Because of this, application, or lack of atmospheric pressure may suppress, or accelerate the expansion: applying an adjustment to the ultimate melting or moulding temperature in any given scenario.

Another consideration is melting point depression caused by impurities in a particular plastic material. This is easily understood as analogous to roads being “salted” during the winter, with an impurity being added to adjust the melting point of ice.

Finally, the molecular structure of a plastic is important to consider. Crystalline polymers (consisting of syndiotactic and isotactic polymer chains) that are highly structured, typically have more specific melting points, which can be reliably targeted to achieve the same effect at a definite temperature.

Amorphous polymers (made from atactic polymer chains) on the other hand have no such structure, which can make their exact melting temperature less predictable, leading to temperature ranges being more suitable for classifying their melting points.


IMPORTANT NOTICE AND DISCLAIMER IN RESPECT OF THE MATERIAL MELT & MOULD TEMPERATURES CALCULATOR

This information should be used as an 'on the spot' reference only. Users should always follow the material suppliers processing data sheets. The data is provided “as is” and without any representation or warranty of any kind, including that it is fit for any purpose or of merchantable quality, or functions as intended or at all. Your use of this data is entirely at your own risk and PlastikCity accepts no liability of any kind.

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