Ideal Plastic specializes in customized processing of DuPont™ Vespel SP-21 Parts. With more than 14 years of dedicated polyimide production experience, we adopt international high-quality raw materials and full-process precision machining technology to provide customized components compliant with global environmental standards. Our one-stop processing service covers profile blank supply and finished part customization, serving global industrial high-precision equipment supporting demands. Request a sample!
Ideal Plastic's quality Vespel SP-21 parts is basically a polyimide material with 15% graphite mixed in, and the finished product ends up black. Now, polyimide plastics can actually be grouped in a few different ways. Based on their chemical structure, they’re split into aliphatic, semi-aromatic, and aromatic types. You can also categorize them by the forces between the chains—like cross-linked and non-cross-linked. These materials are usually made through a condensation reaction between dianhydride and diamine. Some of them are thermoplastic, so they can be melted and processed, which works well for injection molding or extrusion. Others are thermosetting; once they’re cured, they won’t melt again, and they often have better heat resistance and mechanical properties.
After adding that 15% graphite micro powder to the polyimide, these SP-21 vespel parts’ friction coefficient drops quite a bit. This boosts both its self-lubricating ability and wear resistance, making it a great fit for uses where you need low friction and high durability. So, not only does the mechanical performance get better, but the product’s lifespan is extended too. That gives a real, noticeable improvement in quality and efficiency for industrial and tech applications. On top of that, with graphite added, the material gets harder, resists creep more effectively, and the thermal expansion coefficient goes down. Even under long-term or repeated stress, it’s less likely to deform. This helps keep the product accurate and stable, which is why it’s so suitable for precision mechanical components.
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Product name |
Vespel SP-21 parts |
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Material |
Polyimide with 15% graphite filler |
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Color |
black |
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Density |
1.51 g/cm³ |
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Site |
custom |
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Drawing formats |
2D and 3D drawings or templates in commonly used formats such as STEP, STP, STL, IGS, IGES, PRT, SLDPRT, SAT, X_T, etc. |
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Tolerance |
According to the drawings |
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sample |
Negotiation |
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Minimum order quantity |
1 piece |
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Certificates |
ISO9001:2008, REACH, ROHS |
The 15% graphite modified formula endows Vespel SP-21 with balanced high-temperature stability, mechanical toughness and tribological properties, solving the application limitations of pure polyimide in high-friction and long-cycle working scenarios. Its comprehensive performance far exceeds ordinary engineering plastics, becoming a core alternative material for metal and ceramic parts in high-end industrial equipment.
Vespel SP-21 maintains stable physical and chemical properties in extreme temperature environments, supporting long-term stable operation in the temperature range of -269°C to 400°C. It retains excellent structural stability for prolonged service above 300°C, and individual high-performance grades can withstand short-term extreme temperatures exceeding 400°C. This outstanding temperature resistance enables it to adapt to continuous high-temperature operation of aerospace and automotive power equipment.
Graphite micro-powder filling significantly optimizes the friction characteristics of polyimide materials, reducing friction coefficient and improving surface wear resistance. The material forms a stable self-lubricating layer during equipment operation, effectively reducing component friction loss and abrasion failure. It avoids frequent replacement of wearing parts, greatly lowering equipment maintenance costs and improving overall operational stability.
Modified by graphite, Vespel SP-21 features higher material hardness and lower thermal expansion coefficient. It effectively resists creep deformation and structural displacement under long-term static load and repeated dynamic stress. The stable dimensional accuracy ensures consistent matching precision of mechanical parts, fully meeting the strict assembly requirements of precision automated equipment.
The substrate polyimide material has high strength, high rigidity and excellent toughness, capable of resisting external impact and deformation stress. Meanwhile, it maintains reliable insulation performance under high-temperature working conditions, with stable chemical inertness against conventional industrial media. The integrated advantages of mechanics, insulation and chemical stability support its multi-scenario industrial application.
Relying on superior high-temperature resistance, wear resistance, dimensional stability and insulation performance, Vespel SP-21 machined parts are widely applied in aviation, automotive, electronic manufacturing and general industrial machinery fields, replacing traditional metal accessories to achieve equipment lightweighting and long-life operation.
Suitable for jet engine core accessories, fuel system structural components, compressor and generator matching parts, as well as high-strength fasteners and spline joints. It adapts to high-temperature, high-speed and high-load extreme working environments of aviation equipment, ensuring long-term stable operation of airborne components.
Commonly used in automotive engine precision parts, wear-resistant bearings, piston rings and timing gear components. Its high-temperature resistance and anti-wear properties effectively adapt to the high-heat and high-friction operating environment of automotive power systems, extending the service life of vulnerable parts.
Applied to printed circuit board auxiliary parts, high-temperature resistant insulating components, heat-resistant cables, terminals and socket structural parts. The material’s stable insulation and high-temperature aging resistance ensure safe and stable operation of electronic and electrical equipment.
Widely adopted for high-temperature self-lubricating bearings, compressor blades, sealing gaskets, heat shields, thrust washers and bushing parts. It also serves automated printing equipment, tobacco machinery and other precision industrial devices, providing stable wear-resistant and insulating support for mechanical operation.
As a professional supplier of high-performance Vespel SP-21 parts in China, Guangzhou Ideal Plastic Technology Co., Ltd. has accumulated 14 years of mature production and R&D experience in Vespel series materials since its establishment in 2011. The company has independent polyimide profile production lines and complete precision processing equipment, including CNC lathes, milling machines, drilling machines, multi-axis machining centers and laser cutting equipment, realizing integrated production from raw material profiles to finished precision parts.
We consistently select top international brand raw materials, with each batch of materials undergoing strict physical and environmental testing. The standardized production process strictly controls every production link, ensuring that all Vespel SP-21 finished parts meet ROHS, REACH, EN71 and other international environmental protection standards. Supported by a complete quality management system and experienced technical team, we deliver high-precision, high-stability customized products for global customers, building long-term reliable cooperative relationships with professional industrial clients.
1. Flexible Custom Processing: Support full customization according to customer 2D/3D drawings and physical samples, covering structural optimization, precision machining and special-shaped part production to meet personalized project demands.
2. Low-Threshold Order Support: Accept single-piece procurement of standard semi-finished profiles, with flexible production arrangements for small-batch prototype testing and mass production orders.
3. Strict Batch Quality Control: Implement raw material screening, semi-finished product inspection and finished product full testing to ensure consistent dimensional accuracy and stable mechanical properties of each batch of parts.
4. Standard Compliance Certification: Provide complete product qualification reports and environmental test documents to support customer project review and market access.
5. Professional Technical Support: Rely on years of polyimide processing experience to provide customers with process optimization suggestions and reliable customized solution matching.
In-stock standard profile blanks can be arranged for shipment immediately after payment confirmation. The delivery time of customized precision parts is determined by order quantity, structural complexity and production procedures, with a reasonable production cycle confirmed through prior project communication.
We cooperate with mature international logistics carriers such as DHL and FedEx to provide fast air freight and economical sea freight services. Customers can also designate exclusive freight forwarders to match their global supply chain layout. Shipping costs are calculated based on product size, weight and destination, borne by the customer.
For product quality problems, dimensional tolerance deviations or assembly failures caused by production errors, we provide free replacement and refund services, and bear the corresponding return and exchange logistics costs. For customer-initiated return and exchange demands of resalable standard profiles, we support after-sales processing with customers undertaking logistics expenses.
We provide formal NDA confidentiality signing services for all customer exclusive drawings, design schemes and customized product data. We strictly keep all customer project information confidential, prohibit any public disclosure and dissemination, and assume corresponding legal responsibilities for confidentiality obligations.
We provide long-term follow-up technical after-sales services. Customers encountering product application problems can consult our professional technical team at any time, and we will provide targeted problem-solving and technical guidance to ensure smooth product application.
With 14 years of in-depth focus on engineering plastic customization, we own multiple technical patents and mature processing technology. Equipped with high-end full-process production equipment and an experienced technical team, we optimize production processes to balance product quality, production efficiency and cost control, providing cost-effective customized solutions for global industrial customers.
