High-Insulation & Voltage-Resistant PPS Plastic Pellets
We supply High-Insulation & Voltage-Resistant PPS Plastic Pellets engineered for high-voltage injection moulding and electrical isolation. Featuring a Comparative Tracking Index (CTI) exceeding 600V, dielectric strength up to 45–50 kV/mm, UL RTI thermal limits of 200°C–240°C, and UL94 V-0 flame safety, this high-dielectric compound eliminates arc-over and electrical tracking risks in power electronics. Ideal for injection moulding IGBT module housings, EV high-voltage connectors, transformer bobbins, and motor slot wedges. Custom melt flow rates, filler percentages, colors, and CTI ratings are fully available upon request. Share your specs for a quick quote.
Product information
Published information supports preliminary product selection. Confirm the exact grade, dimensions, tolerances, documentation and application suitability with the quotation for your order.
Description
High-Insulation & Voltage-Resistant PPS Plastic Pellets represent the premier standard in electrical insulation compounds for high-voltage, high-frequency, and high-temperature power distribution components. Formulated with specialized non-conductive mineral and glass reinforcements, this compound prevents electrical tracking and dielectric breakdown under severe voltage stress and humid operating environments.
Offering a CTI rating ＞600 V (UL CTI Performance Level Category 0) and dielectric breakdown strength of 45–50 kV/mm, it delivers excellent melt flowability for thin-walled precision injection moulding. With a UL RTI temperature index of 200°C–240°C, inherent UL94 V-0 flame safety, and low mold shrinkage, it is specified for electric vehicle (EV) inverter modules, high-voltage terminal blocks, and aerospace power distribution components.
Property Datasheet & High-Voltage Electrical Summary
| Property / Parameter | Technical Value / Standard | Engineering Advantage |
| Material Form & Color | Compounded Pellets / Granules (Off-White & Black) | High Flowability for Injection Moulding |
| Comparative Tracking Index (CTI) | CTI > 600 V (UL PLC 0 Rating) | Zero Electrical Arcing or Carbon Tracking |
| Dielectric Strength (1mm) | 45 – 50 kV/mm (IEC 60243-1) | Prevents High-Voltage Breakdown |
| UL Temperature Index (RTI) | Continuous: 200°C–240°C / HDT: >260°C | High Heat Stability under Electrical Stress |
| Dielectric Constant (𝐷ₖ/ 𝐷𝑓) | 𝐷ₖ = 3.7/ 𝐷𝑓 = 0.009 (1MHz) | Low Dielectric Loss in High-Freq Systems |
| Flammability Rating | UL94 V-0 (Inherent Flame Retardant) | Flame Safety in High-Voltage Enclosures |
How this product is normally specified
This product is supplied as compounded pellets for high-precision injection moulding or melt extrusion:
-
Melt Processing: Formulated for high-precision injection moulding machinery
-
Insulation Rating: High CTI (> 600 V) and high breakdown voltage (45-50 kV/mm)
-
Flow & Shrinkage: Optimized melt flow rate (MFR) for complex thin-walled electrical parts
-
Customization: Custom flow rates, filler percentages, colors, or CTI ratings upon request
Where this material can fit
Typical applications for high-dielectric PPS resin pellets include:
-
EV & Power Electronics: Injection moulded IGBT power module outer shells, inverter housings, and high-voltage connectors (> 600 V)
-
Electrical Power Distribution: High-voltage terminal blocks, busbar insulators, and circuit breaker barriers
-
Transformers & Motors: Transformer bobbins, coil formers, motor slot wedges, and phase insulation barriers
-
Aerospace Electronics: High-temperature, high-altitude electrical insulation boxes and sensor housings
What to confirm before ordering
To recommend or customize the right high-insulation PPS compound specification, please confirm:
-
Required compound formulation (target CTI rating, MFR, or filler percentage)
-
Electrical parameters (operating voltage, CTI requirement, or frequency)
-
Injection moulding machine capabilities and mold cavity design
-
Required trial quantity and estimated annual commercial demand
Send us the information you have. We will review technical details before confirming the quotation.
Material overview
Understanding PPS (Polyphenylene Sulfide)
Why engineers use it
- Broad chemical resistance for many industrial fluids and process environments.
- Low moisture uptake and good dimensional stability.
- Useful electrical insulation and inherent flame-resistance characteristics.
- Reinforced grades can provide high stiffness and repeatable molded dimensions.
- Often offers a practical cost/performance position below PEEK.
Limits to consider
- Unfilled PPS can be relatively brittle and design details strongly affect impact performance.
- Glass or mineral reinforcement changes shrinkage, anisotropy and machining behavior.
- Oxidizing media and actual high-temperature chemicals still require compatibility review.
- Weld lines, sharp corners and molding orientation can become structural weak points.
- It should not be selected from chemical-resistance charts alone.
Grades and product forms
PPS is commonly supplied unfilled or reinforced with glass fiber, mineral filler, carbon fiber or combined systems. The filler package changes stiffness, movement, surface finish, conductivity and wear. Pellets suit volume molding, while sheet, rod or finished parts may be preferable for prototypes and lower-volume production.
Performance points to review
| Evaluation area | Why it matters | Information to provide |
|---|---|---|
| Temperature behavior | Useful performance under elevated or changing temperature | Continuous and peak temperature, cycle length and time at load |
| Mechanical response | Strength and stiffness must match the real part geometry | Load direction, stress level, impact and fatigue expectations |
| Environmental resistance | Fluids, cleaning agents and atmosphere can change service life | Chemical name, concentration, temperature and exposure time |
| Dimensional control | Tight-tolerance parts depend on both material and processing | Finished dimensions, tolerances and assembly conditions |
| Electrical or insulation needs | Electrical requirements may influence grade and thickness | Voltage, dielectric, conductivity or insulation target |
These are engineering discussion points, not guaranteed property values. Final acceptance criteria should be agreed for the selected grade, process and order.
Typical application directions
These examples show where the material may be evaluated. They do not replace a suitability review for the finished component.
Preparing a pellet or granule project
State whether the resin will be injection molded, compression molded, extruded, compounded or used in process development. Include machine capability, part thickness, mold concept, drying and handling plan, color, filler or additive needs, and the property the finished part must retain. For an unfamiliar resin, a controlled trial lot is more useful than moving directly to production volume.
Where the application is critical, define what a successful trial looks like before material is ordered: dimensions after processing, visual condition, mechanical response, assembly fit or another measurable result.
When another material may be better
PEEK may be preferred when toughness or a broader high-temperature performance margin is required. PPS can be the more practical solution when chemical resistance, stiffness, repeatable molding and cost control are the central requirements.
We recommend sharing the current material and the reason it is being reconsidered. Cost, processability, supply form and inspection burden belong in the decision alongside technical performance.
Information needed for an accurate quotation
A useful RFQ reduces follow-up questions and helps us distinguish between a material request and a finished-part requirement.
| Product form | Pellets or granules; natural, black or another required color |
|---|---|
| Grade direction | Unfilled, reinforced, modified or application-specific requirement |
| Quantity | Trial quantity, first order and estimated annual demand |
| Application | Part function and current material, if any |
| Operating temperature | Continuous range, peak temperature and cycle duration |
| Environment | Chemicals, gases, moisture, pressure, vacuum or outdoor exposure |
| Mechanical duty | Load, speed, impact, wear and mating components |
| Documentation | Drawing revision, inspection, traceability or compliance needs |
| Conversion process | Molding, extrusion, compounding, sintering or development work |
| Packaging | Trial pack, production packaging and moisture-control expectations |
Frequently asked questions
Can I request a sample or trial quantity?
Trial quantities can be discussed according to product form and availability. Tell us what you need to prove during the trial, the intended process and the expected production quantity if the test succeeds.
Do you provide a data sheet or material documentation?
Available documentation depends on the selected material and supply route. List the documents required by engineering, purchasing or quality when you inquire so they can be checked before quotation.
Can the grade be selected from a product name alone?
No. Similar product names can cover different grades, colors, fillers and processes. Selection should be based on the finished application, environment and required property balance.
Can you supply custom dimensions or finished parts?
Custom sizes, blanks or finished parts can be reviewed where appropriate. A drawing with tolerances, quantity and material requirement is the best basis for quotation.
How should we evaluate an alternative to our current material?
Share the current grade, the part’s service conditions and the reason for changing it. A useful comparison looks at failure mode, processing, life, inspection and total project cost—not only a single property value.
What determines lead time?
Lead time depends on product form, grade, size, quantity, documentation, machining and current availability. Confirm the required delivery date and destination with the RFQ rather than assuming a standard schedule.
Send the drawing, application and quantity. We will use the project details to prepare a practical material and supply discussion.
Reviews
There are no reviews yet.