Plastic Material Melt & Mould Temperatures Table

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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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