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Since 1987, China Rainbow has been a trusted manufacturer of high-performance porous plastic filtration media for water, pharmaceuticals, chemicals, electronics, and industrial applications worldwide.
Since 1987, as a company specializing in the manufacture of porous plastic in China, RAINBOW has been supplying high-quality filtration materials for a wide range of industries. We are committed to innovation, eco-sustainability, and excellence in every product we deliver.
Our expertise spans filtration, silencing, venting, fluidizing, diffusers, and wicking technologies. In 2003, we successfully passed the ISO13485 quality management system certification, affirming our commitment to international standards in quality and safety.
Over 35 years of innovation in porous plastic filtration technology.
Compliant with international quality standards for medical devices.
Solutions designed with performance, reliability, and sustainability in mind.
Expert consultation and custom filtration solutions tailored to your needs.
Environmentally responsible manufacturing and recyclable materials.
Transparent processes and adherence to global regulatory standards.
Pioneering new materials and filtration technologies.
Designing with end-user performance and safety as top priorities.
High-strength porous plastic discs for liquid and gas filtration in pharmaceutical and chemical applications.
Ideal for enclosures requiring moisture-resistant air exchange in electronics and medical devices.
Uniform gas dispersion for bioreactors, wastewater treatment, and chemical processing.
Precision wicks for fuel cells, humidifiers, and liquid transfer systems.
Noise reduction for compressed air systems, valves, and actuators.
Replaceable filter cartridges for industrial fluid processing and purification.
Customizable sheets for DIY filtration, lab use, and industrial integration.
Engineered porous components for specialized filtration, venting, and fluid control.
Filtration of drinking water, wastewater, and industrial process water.
Sterile filtration, venting, and fluid handling in GMP environments.
Corrosion-resistant filtration and gas dispersion in aggressive media.
Moisture-resistant venting for enclosures, sensors, and battery packs.
Noise reduction and oil mist filtration in compressed air systems.
Air and water quality monitoring, sampling, and emission control.
Gas diffusion layers, humidification, and fuel delivery systems.
Fluidization, level sensing, and process control components.
We use UHMW-PE, PTFE, PVDF, polyethylene, and polypropylene, selected based on chemical compatibility, temperature, and application requirements.
Yes, we offer custom pore sizes from 0.1 to 100 microns and can produce discs, rods, sheets, and complex molded parts to your specifications.
Many of our porous plastic components are autoclavable at 121°C, especially those made from PTFE, PVDF, and UHMW-PE.
Yes, we offer sample kits and prototype support for qualified applications. Contact us for more details.
We serve pharmaceuticals, food & beverage, chemicals, electronics, water treatment, pneumatics, energy, and environmental monitoring sectors.
For inquiries, samples, or technical support, reach out to our team directly.
Phone (Office):
0086-574-87839976
Mobile:
0086-13732188872
Email:
Address:
No.999, Xiangcheng Da Road, Changle Village, Gaoqiao Town, Ningbo, China
Fax:
0086-574-56877636
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