русский 
Kreyòl Ayisyen
Gaeilgenah Éireann
Norsk
Srbija jezik (latinica)
bosanski
Português
Français
magyar
বাংলা
Polski
Main Products
-
PVP-I,pvpi, PVP Iodine manufacturer / supplier in China,... -
Medical Material, CAS 25086-89-9, Vinyl Acetate... -
Povidone-Iodine solution (SUNVIDONE ® PIs) Synonyms:... -
-
-
-
PVP/VA (SUNLYDONE® VA Series) SUNLYDONE® VA Series... -
Hangzhou Rainbow Import & Export Co.,Ltd
1992 Zhejiang Sunflower New Material Co.,Ltd. which was predecessor of STD, engaged in PVP, was set up and Mr. Wu Jiaxiang,the chief expert of the state's R&D project for PVP in China, was appointed as the general manager. 2002 Changed into a private company, Hangzhou Sunflower Technology Development Co., LTd.(STD) was set up and continuing the developing and producing PVP series both in technical grade and cosmetic grade.
Our Factory
The company has the GMP production lines of 600 tons annually of Povidone at low molecular weight ( Povidone K12, K15, K17, K25 and K30), 800 tons annually of Povidone at high molecular weight ( Povidone K60, K90, K120), 300 tons annually of Povidone Iodinated with high stability and 100tons annually of Chondroitine Sulfated Sodium.
Adhering to the people-oriented, guests first principle of integrity service, the method of doing things carefully.
Adhering to the people-oriented, guests first principle of integrity service
The method of doing things carefully.
Application Scenario
Latest News
-
Top 5 Polyvinylpolypyrrolidone Factories in ChinaIn China, Polyvinylpolypyrrolidone (PVPP) is widely used in various industries such as ...Read More
-
Top 5 Povidone Lodine Manufacturers in 2026Povidone Iodine is a chemical widely used for disinfection and antibacterial purposes, ...Read More
-
Top 5 PVP/VA64 Manufacturers in 2026PVP/VA64 (Polyvinylpyrrolidone/ Vinyl Acetate) is a versatile chemical used in pharmace...Read More
-
Top 5 Povidone K25 Manufacturers in 2026As the pharmaceutical industry increasingly demands high-quality raw materials, Povidon...Read More
Testimonials
Carlos Mendez, Colombia
Technical Procurement Manager
We have been working with Hangzhou Rainbow Import & Export Co., Ltd. for three years to import pharmaceutical and cosmetic raw materials. The PVP K30 and NVP monomers they provide are of extremely high purity and excellent batch consistency, perfectly meeting our formulation requirements. They provide customs documentation, analysis reports, and MSDS, ensuring a smooth and seamless import process. Their shipping and packaging are also very professional. We are very impressed with their quality and service and plan to expand our sourcing.
Nour El-Sayed, Egypt
R&D Director
Hangzhou Rainbow Import & Export Co., Ltd. is our primary PVP supplier for skincare products. Their materials helped us improve the stability and clarity of our emulsions, maintaining excellent heat resistance even in Egypt's high temperatures. Furthermore, they provided detailed technical data and sample support, enabling us to quickly complete product registration. From communication to delivery, every step was professional and prompt. We are very grateful for the team's technical background and international service.
Tharindu Perera, Sri Lanka
Production Manager
As a manufacturer specializing in hair and skin care products, we have extremely high requirements for the viscosity and clarity of our raw materials. Hangzhou Rainbow Import & Export Co., Ltd.'s cross-linked PVP series successfully addressed our formulation stability challenges. Their team provided meticulous guidance during sample testing, ensuring we achieved precise dosages. Their product packaging is secure and reliable, and their delivery is prompt. They are a trustworthy partner. We have designated Hangzhou Rainbow Import & Export Co., Ltd. as our core raw material supplier.
Grace Namatovu, Uganda
Quality Control Supervisor
The Povidone-Iodine and PVP-K90 raw materials provided by Hangzhou Rainbow Import & Export Co., Ltd. have performed exceptionally well in our medical disinfectant product line. The test results for each batch are consistently reliable and fully comply with our quality system requirements. Their after-sales service is responsive and they provide great support with shipping and document preparation. Despite the distance between us, the cooperation process has always been smooth and efficient. I have complete confidence in their professionalism and integrity.
Request a Free Quote
If you have any problem when using the website or our products, please write down your comments or suggestions, we will answer your questions as soon as possible!Thank you for your attention!