Quick answer: the top-ranked ro film brands in China on this list are DUPONT (Guangdong), VONTRON (Guizhou) and ORIGINwater (Beijing). 4 Chinese brands are ranked by registration, contact and product data; 10 companies are listed in total. Updated 21 Oct 2026.
Ranked ro film brands
How this list is ranked- 01
DUPONT
DUPONT杜邦
- RO film
- Cellophane
- Toughening Agents
Registered legal entity on file; email and phone published; operating since 1824.
View profile → - 02
VONTRON
沃顿科技VONTRON
- RO film
- Nanofiltration membranes
- Ultrafiltration Membranes
Registered legal entity on file; email and phone published; operating since 1999.
View profile → - 03
ORIGINwater
碧水源ORIGINwater
- RO film
- Environmental protection equipment
- Ultrafiltration Equipment
Registered legal entity on file; phone published; operating since 2001.
View profile →
- 04
Ao Wei Ke Ji 澳维科技
Registered as 湖南澳维科技股份有限公司 in 2014.
- RO film
Why it ranks here: registered legal entity on file; email and phone published.
International ro film brands in China
Foreign-owned groups with Chinese manufacturing or sales companies. Listed separately so the ranking above covers Chinese manufacturers only.
- INT
HYDRANAUTICS HYDRANAUTICS海德能
Registered as 日东(中国)新材料有限公司 in 2014.
- RO film
- Nanofiltration membranes
- Ultrafiltration Membranes
Why it ranks here: registered legal entity on file; phone published; operating since 1963.
- INT
TORAY TORAY东丽
Registered as 东丽(中国)投资有限公司 in 2002.
- RO film
- Carbon fiber boards
- Air conditioner filters
- ABS plastic
- Foam
- Functional fabrics
Why it ranks here: registered legal entity on file; phone published; operating since 1926.
- INT
VEOLIA VEOLIA威立雅
Registered as 威立雅(中国)环境服务有限公司 in 2003.
- RO film
- Electrodialysis equipment
- Ultraviolet sterilizers
- Ultrafiltration Equipment
- Nanofiltration membranes
- Aquaculture Equipment
Why it ranks here: registered legal entity on file; phone published; operating since 1853.
- INT
Sinaenro Sinaenro
Registered as 中化国际(控股)股份有限公司 in 1998.
- RO film
- Ultrafiltration Membranes
Why it ranks here: registered legal entity on file; email and phone published; operating since 1998.
More RO film brands and companies
| Brand | Registered company | Website |
|---|---|---|
| KovalusKovalus | 科沃滤(上海)分离技术有限公司 | — |
| TOYOBOTOYOBO东洋纺 | 东洋纺(上海)投资有限公司 | — |
Comparison table
| # | Company | Province | Est. | Registered company |
|---|---|---|---|---|
| 01 | DUPONTDUPONT杜邦 | Guangdong | 1824 | 杜邦中国集团有限公司 |
| 02 | VONTRON沃顿科技VONTRON | Guizhou | 1999 | 沃顿科技股份有限公司 |
| 03 | ORIGINwater碧水源ORIGINwater | Beijing | 2001 | 北京碧水源科技股份有限公司 |
| 04 | Ao Wei Ke Ji澳维科技 | Hunan | — | 湖南澳维科技股份有限公司 |
Frequently asked questions
How many ro film manufacturers and suppliers in China are listed here?
10 companies are listed for ro film (RO膜). 4 Chinese manufacturers have full profiles and are ranked; 4 international brands with China operations are listed separately.
Where are China's ro film manufacturers located?
Among profiled companies: Shanghai (4), Guangdong (1), Guizhou (1), Beijing (1), Hunan (1).
How is this list ranked?
By the completeness and verifiability of each company's data: a registered legal entity, an official website, published contact details, a product range and company history. The rank is not a quality rating, and no company pays for its position. See How we rank for the full method.
How do I contact these manufacturers?
Each listing shows the company's official website and, where published, its email and phone number. Of the 10 companies listed, 8 have an official website and 4 publish an email address.