Special Engineering Plastics: Unlocking the Core Value of High-End Manufacturing

2025-12-05

Discover Bost’s expertise in special engineering plastics, delivering precision injection molds tailored for high-end application fields. Unlock core value in advanced manufacturing with our innovative materials and solutions designed to meet the toughest industry demands.

In the plastic family, "special engineering plastics" are truly the "elite group" — unlike common plastics (such as PP and ABS) that only meet the needs of daily necessities, they have become key materials in aerospace, medical care, high-end automotive and other fields by virtue of their "hardcore" properties such as high temperature resistance, strong corrosion resistance and high strength. However, the processing of these materials is far more difficult than that of common plastics, requiring extremely strict mold design and injection molding processes. As a professional injection mold company, BOST is well-equipped to solve these manufacturing challenges.

The "specialty" of special engineering plastics is first reflected in their extreme environmental tolerance. Take the common polyether ether ketone (PEEK) as an example: its melting point is as high as 343℃, it can work for a long time in a high-temperature environment of 260℃, and it can resist corrosion by strong acids and alkalis; another type, polyimide (PI), combines high strength and insulation, and its mechanical properties hardly change even in an extreme temperature range of -269℃ to 400℃. These properties make them the first choice for medical artificial joints, aerospace sensors, and automotive engine peripheral components, but they also bring processing challenges: ordinary mold steel is prone to deformation at high temperatures and cannot meet the injection molding needs of PEEK; PI has extremely poor flowability, and if the mold gate is improperly designed, the parts are prone to material shortage or internal cracks. BOST is a professional injection mold company. To address such issues, it customizes high-temperature resistant molds using H13 hot-work mold steel and optimizes the gate position and runner size through simulation software — for example, when processing PEEK artificial joint components for a medical enterprise, BOST polishes the mold cavity surface to Ra0.01 microns, which not only prevents material adhesion but also ensures the surface smoothness of the parts meets the standards for human implantation.

Precise control of process parameters is another key to the molding of special engineering plastics. The injection temperature of common plastics is mostly 180-250℃, while special engineering plastics such as polyphenylene sulfide (PPS) require 300-330℃, and the injection pressure needs to be 30% higher than that of ordinary processes to ensure the material fully fills the complex mold cavity. If the temperature is too high, the material is prone to decomposition and discoloration; if the pressure is insufficient, bubbles will appear inside the parts. BOST is a professional injection mold company with a database of process parameters specifically for special engineering plastics: for example, when processing PPS sensor housings for automobiles, BOST controls the screw temperature in sections (310℃ at the front of the barrel, 320℃ in the middle, and 300℃ at the rear), adjusts the injection speed to 50mm/s, and matches it with a 3-second pressure-holding time. This ensures the material is fully filled without decomposition risks, increasing the part qualification rate from the industry average of 75% to 99%.

The application scenarios of special engineering plastics require more coordinated adaptation of "mold + process + material". In the aerospace field, parts often need to be both lightweight and high-temperature resistant — for example, satellite components made of polyetherimide (PEI) require molds with high-precision positioning capabilities (error ≤ 0.005mm); in the semiconductor industry, corrosion-resistant components made of polytetrafluoroethylene (PTFE) require molds to be designed with anti-adhesion structures to prevent difficulty in demolding after the material cools. BOST is a professional injection mold company that can provide full-process solutions: from recommending suitable special engineering plastics according to customer needs (such as PEEK for medical care and PEI for aerospace), to customizing special molds, and then to real-time quality monitoring during mass production. It has solved special plastic processing problems for more than 500 enterprises in aerospace, medical care, automotive and other fields. For example, the PEI bracket mold customized for a satellite manufacturer adopts a modular cavity design, enabling quick switching of 3 different specifications of parts and greatly shortening the production cycle.

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FAQ

FAQs

What are the core advantages of Bost engineering plastics compared to ordinary plastics?

Bost engineering plastics feature ultra-high mechanical strength, high-temperature resistance (-50°C to 300°C), chemical corrosion resistance, and wear resistance. Compared to ordinary plastics, their service life is extended by 3 to 8 times, making them suitable for replacing metals in harsh environments.

How do I select the appropriate engineering plastic grade for my product?

Selection should be based on parameters such as load conditions (e.g., pressure/friction), temperature range, medium contact (e.g., oil/acid), and regulatory requirements (e.g., FDA/RoHS). Our engineers can provide free material selection consulting and sample testing.

What is the delivery lead time? Do you offer global logistics?

Standard products: 5–15 working days; custom modifications: 2–4 weeks. We support global air/sea freight and provide export customs clearance documents (including REACH/UL certifications).

Can Bost customize modified plastics with special properties?

Yes! We offer modification services such as reinforcement, flame retardancy, conductivity, wear resistance, and UV resistance, for example:
• Adding carbon fiber to enhance stiffness
• Reducing the coefficient of friction through PTFE modification
• Customizing food-grade or medical-grade certified materials

What is the minimum order quantity (MOQ)? Do you support small-batch trial production?

The MOQ for standard products is ≥100kg. We support small-batch trial production (as low as 20kg) and provide mold testing reports and performance data feedback.