Ideal Plastic factory produces high-quality Vespel SP-21 Plates. Vespel SP-21 plate is a upgraded modified polyimide engineering plastic developed based on pure PI substrate, filled with precisely proportioned 15% graphite powder. Polyimide itself is renowned as a super tough high-end engineering plastic, integrating extreme heat resistance, superior mechanical rigidity, stable chemical inertness and excellent insulation performance, all derived from its unique rigid aromatic molecular structure that adapts to various harsh extreme working conditions.
The 15% graphite filling formula is the optimal ratio for comprehensive performance iteration. It effectively optimizes the internal molecular structure of polyimide, relieves internal structural stress, enhances interlayer bonding toughness and improves impact resistance. Meanwhile, the graphite forms a uniform lubricating film on the material surface, endowing the product with stable self-lubricating and anti-wear properties.
Unlike excessive graphite filling that causes structural agglomeration and strength attenuation, the 15% ratio of SP-21 achieves the perfect balance of mechanical strength, electrical performance and friction resistance, avoiding the strength loss defect of high-graphite modified PI materials.
Manufactured by Guangzhou Ideal Plastic with 14+ years of professional PI production experience, the products support 1-piece MOQ, free sample testing, full-size stock supply and full-process secondary precision processing, serving automotive, marine, chemical, mining and electronic industries globally.
Products Data
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Product name
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Polyimide SP-21 plate
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Material
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Polyimide resin+15% graphite filling
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Color
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black
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Width
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600mm, 1000mm
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Thickness
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3mm - 100mm
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Tolerance
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±0.02mm
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sample
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Negotiation
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Minimum order quantity
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1 piece
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Certificates
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ISO9001:2008, REACH, ROHS
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Additional services
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Secondary processing can be provided.
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Core Performance Advantages
Tailored with a unique 15% graphite modified formula and rigid polyimide molecular structure, Vespel SP-21 plates possess exclusive mechanical advantages that distinguish them from ordinary engineering plastics and high-graphite SP-22 PI materials. It focuses on solving core pain points such as long-term load deformation, high-temperature creep failure and structural fatigue of industrial precision parts, fully meeting the stringent requirements of high-load, high-precision and corrosion-prone harsh working conditions.
1. Consistent Extreme High Temperature Resistance
The low-content graphite modification will not damage the inherent high-temperature resistance of polyimide materials. The finished plate maintains stable structural rigidity and mechanical performance under sustained high-temperature operation. Its thermal decomposition temperature exceeds 500°C, and the glass transition temperature ranges from 250°C to 400°C. It will not soften, deform or suffer performance attenuation in long-term high-temperature industrial environments, providing reliable structural protection for high-temperature mechanical accessories.
2. Optimal Mechanical Strength & Structural Toughness
15% graphite is the optimal modification ratio for maximizing polyimide mechanical performance. This formula effectively improves the internal compactness of the material, strengthens molecular interlayer binding force, and comprehensively upgrades the product’s toughness, impact resistance and structural stability. It completely avoids the structural defects of high-graphite modified PI materials, such as particle agglomeration and reduced mechanical strength, making SP-21 the preferred material for high-strength load-bearing structural parts.
3. Micron-level Ultra-high Dimensional Stability
Vespel SP-21 plate features ultra-low water absorption (below 0.1%), with humid and thermal dimensional variation only 1/10 of traditional PTFE materials. Benefiting from the rigid aromatic imide molecular structure, it has extremely low thermal and moisture expansion coefficients. The dimensional change rate in acid-base corrosive environments is controlled within 0.01%, realizing micrometer-level precision retention. No warping, swelling or deformation occurs in complex temperature and humidity and corrosive environments, ensuring long-term precision matching of mechanical parts.
4. Excellent Chemical Corrosion Resistance
The material inherits the excellent chemical inertness of high-purity polyimide, resisting erosion from strong acids, strong alkalis and most industrial organic solvents. It can operate stably for a long time in harsh chemical and oil field environments, with outstanding anti-aging and anti-corrosion capabilities. It is widely applied in corrosion-resistant supporting parts for chemical pipelines, valves and pump equipment, adapting to long-term corrosive working scenarios.
5. Outstanding High-temperature Creep Resistance
With a rigid main molecular chain and 200–250 kJ/mol hydrolysis energy barrier, Vespel SP-21 plate delivers far better high-temperature creep resistance than mainstream engineering plastics like PEEK. Under long-term continuous load and high-temperature conditions above 150°C, it can effectively resist gradual stretching, bending and permanent deformation, maintaining stable dimensional accuracy and operational reliability of precision mechanical parts throughout the service cycle.
6. Stable Self-lubricating & Wear Resistance
Uniformly distributed fine graphite particles form a continuous and smooth self-lubricating protective film on the material surface during equipment operation, effectively reducing friction coefficient and abrasive loss. It realizes passive lubrication without additional lubricating oil, significantly reducing part wear and equipment maintenance frequency, greatly extending the service life of industrial anti-wear parts.
Diversified Industrial Application Scenarios
Focusing on mechanical toughness, creep resistance and anti-wear performance advantages, Vespel SP-21 graphite filled polyimide plates solve the common defects of ordinary plastic parts such as easy deformation, rapid wear and poor long-term stability. They are widely used in multiple high-load, harsh and high-precision industrial fields, providing reliable customized material solutions for diverse industrial equipment supporting scenarios.
Automotive Industry:
Custom high-strength wear-resistant structural parts, automotive anti-friction accessories and precision transmission components
Ship & Marine Engineering:
Marine corrosion-resistant and high-temperature resistant equipment parts, durable marine structural accessories adapting to humid salt fog environment
Electrical & Electronic Industry:
High-stability insulating accessories, precision electronic structural parts and anti-wear electrical components
Chemical Industry:
Corrosion-resistant accessories for chemical equipment, pipeline, valve and pump body supporting parts adapting to strong corrosive media
Anti-corrosion Equipment Field:
Long-term anti-aging and anti-corrosion structural plates for industrial anti-corrosion equipment
Mining Equipment:
High-load wear-resistant and impact-resistant mining mechanical parts, durable industrial supporting accessories
Factory Strength & Professional Service Advantages
Boasting 14+ years of deep technical accumulation in polyimide new material research and industrial manufacturing, Guangzhou Ideal Plastic has mature exclusive R&D formula and batch production capacity for Vespel SP-21 plates. The factory is equipped with dedicated PI profile molding production lines and full-set precision processing equipment, supporting integrated services including hot pressing molding, laser cutting and CNC precision machining. We realize one-stop full-process production from raw material formula optimization, plate molding to finished precision part customization.
Full-link Precision Quality Control:
We implement whole-process closed-loop quality supervision covering raw material screening, graphite formula precise proportioning, high-temperature molding and finished product inspection. Every production procedure adopts standardized operation standards to ensure stable batch consistency and reliable mechanical performance of SP-21 plates.
Independent Patent & Technical Advantages:
We own multiple utility model patents in PI material modification and precision processing technology. Through long-term technical iteration and process optimization, we continuously improve material structural stability while controlling production costs, delivering high-cost-performance products.
Flexible Customized Order Service:
Adapt to diversified customer procurement demands, supporting ultra-low-threshold single-piece trial orders, small-batch prototype verification and long-term large-scale batch customized production. Sufficient conventional size inventory ensures fast response to customer orders.
Complete Global Export Qualifications:
The factory passes ISO9001 quality management system certification, and all SP-21 products are equipped with complete SGS, CE, RoHS and REACH certification reports, fully complying with global industrial product environmental protection and safety access standards.
Strict Sample & Batch Consistency Guarantee:
We provide negotiable free sample testing services. All bulk products strictly follow sample specifications, material ratio and performance indicators, with zero deviation. Professional after-sales team provides efficient problem-solving and perfect return and exchange guarantee.
Frequently Asked Questions
Q1: What performance characteristics make Vespel SP-21 plates different from common PI and SP-22 grades?
A: Vespel SP-21 features a 15% low-graphite formula with core advantages completely different from SP-22. While SP-22 prioritizes low thermal expansion, SP-21 is engineered for superior mechanical performance. The optimized low graphite ratio prevents particle agglomeration and strength loss, delivering excellent toughness, impact resistance and high-temperature creep resistance, ideal for high-load and long-term stress-bearing mechanical applications.
Q2: Do you support small-batch trial orders?
A: We support flexible low-quantity procurement for standard SP-21 plates with an MOQ of just 1 piece, perfectly fitting prototype testing, R&D verification and small-batch trial production. Custom machined parts will adopt flexible order quantities confirmed according to structural complexity and processing requirements.
Q3: Is free sample support available for Vespel SP-21 plate performance testing?
A: Free standard samples are available for performance testing, with customers only covering shipping fees. All mass-produced SP-21 plates strictly follow sample standards in material proportion, dimensional accuracy and mechanical performance, ensuring zero consistency deviation and lowering procurement risks.
Q4: What qualification certifications do your SP-21 plates possess for global export?
A: Our factory holds ISO9001 quality system certification. All SP-21 plates are equipped with official SGS, CE, RoHS test reports and comply with REACH, EN71 international environmental standards, fully meeting global export market access requirements.
Q5: What is your typical lead time for SP-21 plate orders?
A: In-stock standard SP-21 plates support instant shipment after payment. Custom sizes and secondary processed products will be scheduled with an accurate lead time based on order volume and process difficulty to guarantee on-time delivery.
Q6: What is your after-sales return and exchange policy for SP-21 plates?
A: We offer standardized after-sales protection. For factory quality defects and processing errors, we provide free returns or exchanges with full logistics coverage. For customer subjective reasons such as wrong ordering, returns are acceptable for unused resellable products at the buyer’s shipping cost.
Custom Processing & Bulk Wholesale Inquiry
We provide one-stop integrated service solutions for Vespel SP-21 plates, covering standard wholesale, special size customization and full-range secondary precision processing. Whether you need small-batch sample testing, prototype customization or large-scale industrial supporting batch procurement, we can provide exclusive targeted product solutions and stable quality assurance.
Welcome global industrial buyers to inquire about product parameters, customized schemes and factory quotations.
Hot Tags: Customizable Vespel SP-21 Plates
