5G Low-Dielectric PPS Rods & Sheets (Low Dk/Df)
Dk ≤ 3.0 | Df ≤ 0.002 at 10GHz–28GHz | High-Frequency RF Stock Shapes
Supplied as precision high-frequency machining stock, our 5G Low-Dielectric PPS Rods & Sheets feature an ultra-low Dielectric Constant (Dk ≤ 3.0) and Dissipation Factor (Df ≤ 0.002) across 10GHz–28GHz millimeter-wave frequencies. Designed for RF connectors, 5G base station insulators, and radar housings, our stress-relieved stock shapes combine low signal attenuation with continuous heat resistance up to 220°C and near-zero moisture absorption.
Send your target rod diameter, sheet thickness, or drawing below for a prompt 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-Frequency RF Performance Matrix
| Material Metric | Standard Engineering Plastics | PTFE (Teflon) | 5G Low-Dielectric PPS Stock |
| Dielectric Constant (Dk at 10GHz) | 3.5 – 5.0 (High Loss) | ~ 2.1 (Ultra-Low) | 2.8 – 3.0 (Low Dk / Stable) |
| Dissipation Factor (Df at 10GHz) | > 0.01 (High Attenuation) | ~ 0.0002 | ≤ 0.002 (Low Signal Loss) |
| Machined Thread Rigidity | Moderate | Soft (Cold flow under load) | High Rigidity (Zero Deformation) |
| 220°C Thermal Stability | Poor | Softens | High Stability / Zero Drift |
Practical Material Behavior & Characteristics
Thanks to its non-polar, highly symmetrical polymer chain structure, Low-Dielectric PPS exhibits exceptional dielectric stability across a wide temperature range (-40°C to +220°C) and broad frequency spectrum (10MHz to 28GHz millimeter-wave).
Unlike PTFE which deforms under tightening torque, Low-Dielectric PPS allows precision CNC threading and micro-milling for high-frequency coaxial connectors and RF structural insulators without physical deformation or signal impedance drift under outdoor thermal cycling.
Engineering Selection Guidelines: When to Specify Low-Dk Grade
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Specify when: Machining 5G telecommunication base station insulators, RF coaxial connectors, microwave phase shifters, or millimeter-wave radar radomes requiring minimal signal loss and high dimensional rigidity.
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Specify when: Components must maintain stable Dk and Df values in outdoor, high-humidity, and elevated-temperature environments where moisture absorption would degrade RF signal performance.
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Avoid when: High structural flexural strength is required and RF performance is irrelevant; standard glass-filled (GF30/GF40) grades offer higher mechanical modulus at lower cost.
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Avoid when: Exposure involves concentrated oxidizing acids (such as concentrated nitric acid or oleum), which attack the PPS polymer matrix over time.
Stock Shape Integrity & Machining Notes
Extruded under micro-density control, our Low-Dk PPS stock shapes guarantee 100% solid core density to prevent internal impedance variation caused by microscopic voids.
A 72-hour thermal annealing cycle eliminates internal stresses, ensuring micro-connectors and thin-walled radome covers maintain true sub-micron flat tolerances after milling. Tooling Note: Sharp carbide or PCD diamond CNC tooling is recommended to achieve smooth Ra 0.4μm surface finishes for clean RF signal transmission.
Quote Parameters
Please provide:
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Stock Form & Size: Rod diameter (10mm to 200mm+) or Sheet thickness (5mm to 100mm+) × W × L.
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Frequency Requirement: Target frequency band (e.g., 5GHz, 10GHz, 28GHz millimeter-wave).
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Quantity: Number of rods, sheets, or cut-to-size pieces.
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.
Fabrication and processing preparation
Share the finished part drawing as well as the requested rod diameter and length. This makes it possible to discuss machining allowance, tolerance, cut length, quantity and whether a closer starting size could reduce waste.
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 | Raw material, stock shape, semi-finished blank or completed part |
|---|---|
| Dimensions | Nominal size, finished size and tolerances |
| 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 |
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.
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