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Help CenterOxygen-Free Copper Sealing Strip 99.99% Purity, 0.1mm-2mm Thickness, Annealed, for Vacuum Sealing
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As a trusted manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory specializes in producing high-quality Oxygen-Free Copper Sealing Strips with 99.99% purity. Our strips are precision-annealed to ensure optimal ductility and reliability for demanding vacuum sealing applications. With an annual export value exceeding US$5 million and a global footprint spanning North America, Europe, Asia, and beyond, we deliver consistent performance that meets the strictest industry standards.
Our oxygen-free copper sealing strips are designed to provide exceptional sealing integrity in vacuum environments. The ultra-high purity (99.99%) minimizes outgassing and contamination, while the annealed condition guarantees excellent formability and compression recovery. Whether you need thicknesses from 0.1mm to 2mm or custom widths and lengths, our strips are engineered to create leak-tight seals in high-vacuum chambers, semiconductor equipment, cryogenic systems, and other critical applications.
Key Features & Technical Specifications
- Ultra-High Purity: 99.99% oxygen-free copper ensures minimal volatile impurities, reducing contamination risks in vacuum systems.
- Precision Annealed: Softened temper provides excellent flexibility, allowing the strip to conform to irregular sealing surfaces without cracking.
- Thickness Range: 0.1mm – 2mm, available in increments of 0.01mm for precise gap requirements.
- Customizable Dimensions: Widths from 5mm to 500mm, lengths up to 100 meters per roll, or cut-to-length pieces upon request.
- Clean Surface: Free from oils, oxides, and burrs; ready for immediate installation in cleanroom environments.
- Consistent Hardness: Annealed to a uniform hardness level (typically 40–60 HV) for reliable compression set performance.
- Excellent Conductivity: Electrical conductivity ≥ 100% IACS (optional for grounding applications).
| Parameter | Value |
|---|---|
| Copper Purity | 99.99% (Oxygen-Free) |
| Thickness | 0.1mm – 2.0mm (±0.005mm tolerance) |
| Width | 5mm – 500mm (customizable) |
| Length | Up to 100m per roll (custom lengths) |
| Temper | Annealed (soft) |
| Surface Condition | Clean, smooth, no burrs |
| Application | Vacuum sealing, gaskets, UHV systems |
Benefits for Your Vacuum Sealing Needs
- Minimizes outgassing – 99.99% oxygen-free copper reduces residual gas release, maintaining vacuum integrity.
- Excellent conformability – annealed softness allows the strip to fill micro-gaps, preventing leaks even under moderate compression.
- Long service life – high purity resists oxidation and corrosion in vacuum environments, extending maintenance intervals.
- Versatile sizing – choose from a wide thickness range and custom widths to match your flange design, reducing material waste.
- Ready to use – clean, burr-free surface eliminates pre-cleaning steps, saving installation time.
- Cost-effective – direct factory pricing with flexible lot sizes, suitable for both prototyping and mass production.
Our oxygen-free copper sealing strips are manufactured under strict quality control, including purity analysis (by ICP-OES) and dimensional inspection. Each batch is traceable, ensuring consistent performance from roll to roll. We also offer custom packaging (spool, coil, or flat pack) and on-demand cutting to meet your exact assembly requirements.
Trusted by Industry Leaders Worldwide
With over 25 years of manufacturing experience and an annual export value of US$5 million – US$10 million, Anping County Boli Hardware Wiremesh Products Factory has supplied oxygen-free copper sealing strips to clients in North America, Europe, Southeast Asia, the Middle East, and Africa. Our products are used in semiconductor fabs, research laboratories, aerospace facilities, and high-vacuum equipment manufacturers. We ship from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery worldwide.
Our commitment to quality and customer satisfaction drives us to continuously improve. We provide free samples for evaluation (subject to shipping cost) and offer technical support to help you select the optimal thickness and width for your sealing application. Contact us today to discuss your vacuum sealing requirements and experience the reliability of Boli copper strips.
Frequently Asked Questions
-
What is the difference between oxygen-free copper and regular copper for vacuum sealing?
Oxygen-free copper (99.99% purity) has significantly lower oxygen content, which reduces outgassing and oxidation in vacuum environments. This makes it ideal for high-vacuum and ultra-high-vacuum applications where contamination must be minimized. -
Can you supply strips thinner than 0.1mm?
Yes, we can produce strips as thin as 0.05mm upon request, but availability and minimum order quantities may apply. Please contact our sales team for details. -
What is the maximum width available?
Standard widths go up to 500mm. For wider strips (up to 600mm), we can accommodate special orders with lead time adjustments. -
Are your strips suitable for cryogenic vacuum sealing?
Absolutely. Annealed oxygen-free copper maintains its ductility at low temperatures, making it an excellent choice for cryogenic flanges and gaskets. -
Do you provide certificates of analysis for purity?
Yes, we can provide a mill certificate or a third-party test report for each batch, confirming 99.99% purity and oxygen content. This is available upon request. -
How should I store the copper sealing strips?
Store in a cool, dry environment away from moisture and corrosive gases. We recommend using the material within 6 months of receipt to avoid surface tarnish, though our strips are packaged with anti-oxidation protection. -
What is the typical lead time for custom orders?
For standard thicknesses and widths, lead time is 7–15 days. Custom sizes or special packaging may require 15–25 days, depending on order quantity. -
Can I get a sample before placing a bulk order?
Yes, we offer free samples (3–5 pieces) in standard sizes. You only need to pay the shipping cost. Contact us with your requirements to arrange a sample.
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