Hello people; a plastic’s melting point is essential in determining its applicability. Let’s have a look at the plastic melting temperature values.
What is the Melting point of Plastics
The chemical combination of a plastic determines its melting point. For instance, ABS has a melting point of 200°C (392°F). PVC started melting between 160 and 210 degrees Celsius (320 and 410 degrees Fahrenheit). A plastic’s melting point is also integral for determining its applications and processibility.
Melting Point Definition – A specific temperature range in which a polymer reveals a transition from ordered to disordered resulting from heating is called the Melting point.
Discuss the melting point of all the mainstream plastics with a defined table. Here we go:
Plastic Melting Temperature Chart
Melting Point Range (℃)
|ABS – acrylonitrile-butadiene-styrene||190-270|
|CAB – Cellulose Acetate Butyrate||170-240|
|HDPE – High-Density Polyethylene||210-270|
|LDPE – Low-Density Polyethylene||180-240|
|Nylon 6 or Polyamide||230-290|
|Nylon 6 (30% GF)||250-290|
|Nylon 6/6 (33% GF)||280-300|
|PEEK – Polyether ether ketone||350-390|
|Polypropylene (30% tank filled)||240-290|
|Polypropylene (30% GF)||250-290|
|Polystyrene (30% GF)||250-290|
|PVC – Polyvinyl chloride||160-210|
|SAN – Styrene acrylonitrile||200-260|
|SAN (30% GF)||250-270|
|TPE – Thermoplastic Elastomer||260-320|
Engaging Read – 7 Types of Plastics | An Helpful Illustrated Guide
Wait for a second; that’s not it.
Bonus Content – Let’s also look at the mold temperatures of all the plastic materials. Here we go.
Mold temperature of Plastics
Mold Temprature Range (℃)
|ABS – acrylonitrile-butadiene-styrene||40-80|
|CAB – Cellulose Acetate Butyrate||40-50|
|HDPE – High-Density Polyethylene||20-60|
|LDPE – LowDensity Polyethylene||20-60|
|Nylon 6 or Polyamide||40-90|
|Nylon 6 (30% GF)||50-90|
|Nylon 6/6 (33% GF)||40-90|
|PEEK – Polyether ether ketone||120-160|
|Polypropylene (30% tank filled)||30-50|
|Polypropylene (30% GF)||40-80|
|Polystyrene (30% GF)||40-80|
|PVC – Polyvinyl chloride||20-60|
|SAN – Styrene acrylonitrile||50-85|
|SAN (30% GF)||50-70|
|TPE – Thermoplastic Elastomer||40-70|
Notice – The mentioned information about plastic melting point and mold temperatures is legit but should be used as a reference. For optimal results with production, the best thing would be to consult with your material supplier.
How a Plastic’s Melting Point Affects Its Applications
In the vast and versatile world of plastics, the melting point of a particular polymer serves as one of the primary determinants of its potential applications. Plastics, an essential part of modern life, are designed to serve myriad functions, from the packaging we open daily to the components of life-saving medical devices.
A fundamental understanding of its melting point lies at the heart of determining which plastic suits the job.
Different plastics have varied melting points, directly influencing where and how they are used.
Low melting point plastics, like Low-Density Polyethylene (LDPE) and Polypropylene (PP), are commonly used in the packaging industry. Their lower melting points make them ideal for producing thin films and sheets easily molded and sealed. Food packaging, for instance, demands plastics that can undergo heat sealing without deforming at low temperatures.
Automotive and Aerospace Industries
High-performance plastics with higher melting points are critical for applications where they’ll be subjected to high temperatures. Polymers like Polyetheretherketone (PEEK) or Polysulfone (PSU) are renowned for their heat resistance and are frequently found in car engines and aircraft components for automotive and aerospace verticals. Their ability to maintain structural integrity in extreme conditions sets them apart.
The electronics industry demands plastics that can withstand both the heat generated by electronic components and the heat of the soldering process. Polytetrafluoroethylene (PTFE), with its high melting point, is often used as an insulator in cables and connectors.
Medical devices require plastics that can tolerate repeated sterilization, often involving high temperatures. High melting point polymers ensure these devices remain stable and don’t degrade prematurely.
Think about the variety of plastics used in kitchen appliances. Utensils made of nylon with a reasonably high melting point won’t melt quickly when left in a hot pot. Similarly, the plastic components of coffee makers, toasters, and microwaves are carefully chosen based on their melting points to ensure longevity and safety.
The Importance of Melt and Mold Temperature
Knowing the proper plastic melting and mold temperature is more important than we realize; however, most people don’t take it seriously and downgrade its importance as some random numbers on the screen. It’s not that straightforward; in injection molding, these molding conditions significantly influence the final properties like appearance, strength, and aesthetics.
There needs to be a clear distinction between process conditions and setpoints exercised to have control over them. Melt temperature is the real temperature of the material as it exits the nozzle and enters the mold.
The barrel setpoints showcase the tools we utilize to get the desired melt temperature, which means they differ. The mechanical work done toward the material, the residence time, and screw and barrel condition also play an essential role in establishing the actual melt temperature.
Talking about mold temperature, people assume that this doesn’t impact final product integrity much, but they’re wrong. It’s less obvious but has an acute effect on final properties.
Amorphous materials like polycarbonate and ABS have higher model temperatures producing lower levels of molded in-stress and more significant impact strength, fatigue performance, and stress-crack resistance.
For semi-crystalline materials, mold temperature becomes crucial for understanding the degree of crystallinity in the polymer. This, in turn, is important for many performance attributes, such as fatigue resistance, wear resistance, creep resistance, and dimensional stability at higher temperatures.
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