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high temperature plastic injection molding

Best High-Temperature Plastics for Injection Molding

Explore the world of high-temperature plastics for injection molding, from aerospace-resilient PEEK to precision-molded LCP, uncovering top picks starting with the letter 'A'.

For high-temperature plastics in injection molding, consider PEEK with its 260°C continuous service temperature and resilience in aerospace. PPS and PPSU offer cost-effective solutions, PES excels in chemical resistance at 180°C, while PI is sought after for its dimensional stability at 260°C. PSU shines in medical applications with 180°C continuous use temperature. PEI, with 170°C service temp, stands as an affordable alternative to PEEK in medical and electrical sectors. PAI offers endurance up to 260°C, while LCP stands out for precision molding at 240°C. PPA boasts a robust nature with high stiffness and strength up to 300°C.

PEEK (Polyetherketone)

PEEK (Polyetherketone) stands out in the world of high-temperature plastics for injection molding, boasting a maximum continuous service temperature (CST) of 260°C. This exceptional thermal stability makes PEEK a top choice for applications requiring exposure to elevated temperatures. In aerospace industries, PEEK is highly favored for its ability to withstand demanding conditions. Components like bearings, pumps, and compressor plate valves benefit from PEEK's excellent strength and chemical resistance. Its resilience to high-temperature environments further solidifies its position as a go-to material for critical aerospace components.

The unique combination of properties in PEEK sets it apart from other high-temperature plastics. With a high melting temperature of 343°C, PEEK excels where many other materials would falter. The versatility and reliability of PEEK make it a preferred option in scenarios where performance under extreme conditions is paramount. In aerospace industries, where precision and durability are non-negotiable, PEEK emerges as a standout choice for various engineering applications.


material properties for plumbing

PPS boasts a CST of 220°C, offering exceptional UV and chemical resistance.

PPSU, while harder than PPS, is less thermally resistant, making it suitable for applications prioritizing hardness.

Understanding the advantages of PPS and the diverse applications of PPSU is essential in selecting the right high-temperature plastic for your injection molding needs.

PPS Characteristics

In high-temperature injection molding applications, the characteristics of Polyphenylene Sulfide (PPS) and Polyphenylsulfone (PPSU) play a critical role in determining the performance and suitability of these materials for specific industrial uses.

PPS, with a maximum continuous service temperature (CST) of 220°C, offers excellent UV and chemical resistance, making it ideal for outdoor applications where durability is essential. Commonly used for gaskets, seals, and electrical insulation components in various industries, PPS is a cost-effective solution for high-temperature requirements.

On the other hand, PPSU, with a CST of 210°C, is a harder variant suitable for different applications but slightly less thermally resistant than PPS. Both PPS and PPSU are valuable high-temperature plastics with distinct properties that cater to specific manufacturing needs.

PPSU Applications

With a focus on high thermal resistance and durability, exploring the applications of Polyphenylsulfone (PPSU) and Polyphenylene Sulfide (PPS) in various industries reveals their versatility and reliability in demanding environments.

PPSU, known for its high heat resistance and cost-effectiveness, finds significant use in automotive components where durability and thermal stability are essential. Its excellent UV and chemical resistance make it ideal for outdoor applications as well.

On the other hand, PPS, commonly utilized for parts like gaskets, seals, and electrical insulation, boasts exceptional resistance to solvents and chemicals, making it a versatile choice across various industries.

PPSU, although harder than PPS, offers slightly lower thermal resistance but remains suitable for applications requiring robustness and longevity.

PPS Advantages

Polyphenylene Sulfide (PPS) and Polyphenylsulfone (PPSU) present distinct advantages in high-temperature applications due to their complementary properties and cost-effective nature. When considering PPS and PPSU for your high-temperature plastic needs, you can benefit from the following:

  • PPS offers exceptional UV and chemical resistance, making it ideal for outdoor applications.
  • PPS parts, such as gaskets, seals, and electrical insulation, exhibit high performance in demanding environments.
  • PPSU, although harder than PPS, provides specific advantages due to its unique properties.
  • Both PPS and PPSU are cost-effective options for high-temperature applications, offering durability and heat resistance.
  • Widely utilized in industries like automotive and electronics, PPS and PPSU cater to diverse application requirements efficiently.

PEI (Polyetherimide)

thermoplastic with high strength

PEI, also known as Ultem, stands out as a versatile high-temperature plastic with a maximum continuous service temperature of 170°C, making it a reliable choice for various demanding applications. This heat-resistant plastic offers a unique combination of properties, including excellent strength, ductility, and chemical resistance. As an affordable alternative to PEEK, PEI provides similar performance characteristics, making it a popular choice in industries where high temperatures are a concern.

Commonly used in applications such as medical components, electrical insulators, and thermostat housings, PEI demonstrates its versatility and reliability. Its ability to maintain its properties at elevated temperatures makes it ideal for environments where other materials might fail. The chemical resistance of PEI further enhances its suitability for a wide range of applications, ensuring long-term performance and durability in demanding conditions.

PAI (Polyamideimide)

high performance thermoplastic material

What exceptional properties set PAI (Polyamideimide) apart as a high-performance polymer for demanding industrial applications? PAI is a standout choice due to its remarkable characteristics:

  • High-Temperature Resistance: PAI can endure continuous use in high-temperature environments up to 260°C, ensuring stability in extreme conditions.
  • Excellent Mechanical Properties: This polymer offers superior mechanical strength and toughness, making it suitable for demanding applications.
  • Outstanding Wear Resistance: PAI exhibits exceptional resistance to wear and abrasion, prolonging the lifespan of components.
  • Low Friction Coefficients: Its low friction properties reduce energy consumption and improve efficiency in moving parts.
  • Chemical Resistance: PAI showcases good resistance to various chemicals, enhancing its durability in challenging industrial settings.

These features make PAI a preferred material in industries such as aerospace, automotive, and electronics, where high temperature and reliability are paramount considerations for components subjected to harsh conditions.

PI (Polyimide)

heat resistant polymer film

PI (Polyimide) boasts exceptional thermal stability and chemical resistance, making it a favored high-temperature plastic for industrial applications.

With the ability to endure temperatures up to 260°C continuously, Polyimide is sought after in aerospace, electronics, and automotive sectors for its outstanding mechanical properties.

Its low outgassing, high dielectric strength, and dimensional stability under extreme heat conditions further solidify Polyimide as a versatile material for producing intricate, heat-resistant components with precise tolerances.

PI Properties

With its impressive thermal stability and exceptional mechanical properties, Polyimide (PI) stands out as a high-performance material in the domain of high-temperature plastics for injection molding applications. Here are some key properties of PI:

  • Excellent Thermal Stability: PI can withstand continuous use temperatures of up to 300°C.
  • High Mechanical Strength: PI exhibits robust mechanical properties suitable for demanding industrial applications.
  • Chemical Resistance: PI is highly resistant to chemicals, making it ideal for vital environments.
  • Low Outgassing: PI's low outgassing properties are essential in aerospace and electronic industries.
  • Dimensional Stability: PI offers exceptional dimensional stability and low thermal expansion, ensuring precise outcomes in manufacturing processes.

PI Applications

In high-temperature applications, Polyimide (PI) showcases its versatility and reliability through a range of critical functions and properties. PI's exceptional thermal properties enable it to withstand temperatures up to 300°C, making it a preferred choice for aerospace applications where heat resistance is paramount.

Its ability to maintain structural integrity and mechanical strength under extreme heat conditions is essential for components exposed to high operating temperatures. Within the aerospace industry, PI is favored for its heat resistance and dimensional stability, providing a reliable solution for critical parts in aircraft engines and other demanding environments.

The material's excellent chemical resistance and electrical insulation further enhance its suitability for aerospace applications requiring robust and reliable performance in challenging thermal conditions.

PSU (Polysulfone)

high temperature thermoplastic polymer

PSU, a high-temperature plastic renowned for its exceptional chemical resistance and impact strength, boasts a maximum continuous use temperature of 180°C. This material is widely utilized in various industries due to its outstanding properties.

  • Chemical Resistance: PSU offers excellent resistance to a wide range of chemicals, making it suitable for applications in harsh environments.
  • Impact Strength: Its high impact strength guarantees durability and reliability in demanding conditions.
  • Dimensional Stability: PSU maintains its shape and size even when exposed to high temperatures, ensuring consistency in the final product.
  • Versatile Applications: Commonly used in medical devices, automotive components, and plumbing applications due to its reliability and performance.
  • Ease of Processing: PSU is easy to process, making it a preferred choice for injection molding projects in various industries, including the Medical Industry.

PES (Polyethersulfone)

high performance thermoplastic polymer

To summarize, Polyethersulfone (PES), a high-temperature plastic with a maximum continuous service temperature of around 180°C, offers exceptional chemical resistance and dimensional stability, making it a preferred choice for applications requiring precision and heat resistance.

PES is a heat-resistant plastic that maintains its mechanical strength even at high temperatures, making it suitable for challenging environments where other materials may fail. Its ability to withstand heat without compromising its structural integrity makes it a valuable option for industries such as medical, automotive, and aerospace.

PES is renowned for its dimensional stability, ensuring that parts retain their shape and functionality over time, even when exposed to fluctuating temperatures. This material's strength and rigidity further enhance its utility in demanding applications where high temperatures and harsh chemicals are present.

LCP (Liquid Crystal Polymer)

advanced material for electronics

High-Temperature Plastics like LCP (Liquid Crystal Polymer) exhibit exceptional chemical resistance and mechanical properties, making them ideal for demanding applications requiring precision and heat resistance. LCP is a high-temperature plastic known for its excellent chemical resistance and low moisture absorption, making it suitable for a wide range of applications. Here are some key points about LCP in injection molding:

  • Exceptional Mechanical Properties: LCP offers high tensile strength and stiffness, essential for demanding applications where structural integrity is paramount.
  • Dimensional Stability: With superior dimensional stability, LCP guarantees precise and accurate molding of intricate parts and components.
  • High Heat Resistance: LCP can withstand continuous use at temperatures up to 240°C, making it a top choice for applications in high-heat environments.
  • Low Coefficient of Thermal Expansion: The low coefficient of thermal expansion of LCP ensures consistent performance in fluctuating temperatures, enhancing the overall reliability of the final product.
  • Precision Molding: LCP's properties make it an excellent choice for injection molding processes that demand precision and high performance.

PPA (Polyphthalamide)

high performance polymer material

PPA, a high-temperature plastic resin boasting a melting point ranging between 270°C to 300°C, showcases outstanding stiffness, strength, and dimensional stability, making it a preferred choice for demanding applications.

Its robust nature extends to chemical resistance, moisture resistance, and abrasion resistance, ensuring durability in harsh operational settings. Commonly found in automotive components, electrical connectors, and industrial parts, PPA's versatility and heat resistance render it a popular option for injection molding in high-temperature applications.

The material's ability to maintain mechanical properties at elevated temperatures sets it apart, allowing for reliable performance in challenging environments. With its high melting point and exceptional thermal stability, PPA proves instrumental in achieving intricate designs and intricate part geometries without compromising on strength or functionality.

When seeking a high-temperature plastic that excels in both performance and reliability, PPA stands out as a top contender for various industrial needs.

Frequently Asked Questions

What Plastic Is Used in High Temperature Injection Molding?

When looking for plastics for high-temperature injection molding, consider PEEK, PPA, PAI, PPS, and PEI. These materials offer stability, chemical resistance, and excellent electrical properties.

PEEK withstands temperatures up to 343°C, ideal for tough industrial needs. PEI, like Ultem, can handle up to 338°C and is often used in electrical components.

PPS and PAI are chosen for low flame/smoke toxicity and hydrolysis resistance. Each choice depends on your specific requirements.

What Is the Best High Temperature Plastic?

When seeking the best high-temperature plastic, factors like temperature resistance, durability, and application specifics influence your choice. Understanding the properties of each material is vital.

PEEK boasts exceptional thermal capabilities up to 260°C, while ULTEM offers flame resistance and aerospace suitability at 170°C. PPS and PPSU provide unique advantages in chemical resistance and strength. Polyamide, with a CST of 140°C, offers flexibility and heat resistance.

Choose wisely based on your project needs.

What Plastic Can Withstand 100 Degrees?

When looking for a plastic that can withstand 100 degrees, consider Noryl. This high-temperature plastic offers excellent heat resistance up to 100°C without deformation or loss of properties.

A blend of two polymers, Noryl provides a balance of durability and heat resistance, making it ideal for various applications like electrical components, automotive parts, and industrial uses.

With its stability and cost-effectiveness, Noryl is a reliable choice for moderate temperature resistance needs.

What Type of Plastic Will You Use for High Temperature Application?

When selecting a plastic for high-temperature applications, consider PEEK for its heat resistance up to 260°C.

A cost-effective alternative is PEI, offering excellent heat resistance up to 170°C.

Nylon, or PA, is flexible and heat-resistant, suitable for various high-temperature environments.

PTFE, with a high melting point of 327°C, is ideal for extreme heat conditions in injection molding.

PBI stands out for exceptional thermal stability and chemical resistance.


You have explored the world of high-temperature plastics for injection molding, uncovering the versatility and durability of materials such as PEEK, PPS, PEI, PAI, PI, PSU, PES, LCP, and PPA.

Like a well-oiled machine, these plastics withstand extreme heat with precision and resilience, ensuring peak performance in challenging environments.

Choose wisely, for these materials are the backbone of innovation and efficiency in the world of injection molding.

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