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Product quality is the foundation of the company
R&D
The company benefits from the strong development power brought by R&D and innovation, and will always pay attention to the development direction of customers' products and technologies, anticipate the market trend of products, keep up with the market, make full use of the advantages of R&D, and constantly introduce new products to maintain the company's sustainable development.

—— Strong R&D team

With the core team composed of doctors and masters, senior professional technicians and energetic members, Sundow has strong R&D experience and capabilities from project initiation - development trials - analytical testing - product application.Yonking built long-term cooperation with several independent laboratories, universities and research institutes to assist the company's product development and innovation.

—— Precise testing equipment

Technical center is well-equipped to analyze and test all items from raw materials to finished products, such as mechanical properties, rheological properties, mooney viscosity, elemental chemical analysis, DSC, MFR, PH, ash, hardness, tear strength, thermal stability, rubber aging properties, rubber vulcanization properties, etc.

—— Specialized simulation production line

Yonking owns a specialized set of trial production equipment, which can be used to simulate the production process for the development and innovation of new products , including downstream production processes such as extrusion, injection and vulcanization. It ensures the flexibility, efficiency and low cost of R&D. At the same time, it also has a better understanding of downstream applications, which is convenient for guiding customers' use and improvement.
Technical Surport&Service
Adhering to customer orientation principle, Sundow focuses on customers’ concerns and needs, responds to customers with a sense of urgency and customizes products and solutions for end users.

—— Complete product technical information

Yonking owns a broad portfolio with complete technical information - detailed TDS, SDS, Selection guide, etc. Be familiar with the same kinds on the market and recommend customers alternative products with solutions.

—— Professional team for technical service

Composed of technical personnel with R&D and production experience for nearly 30 years in the field, the team members have a strong sense of customer service and always respond quickly, provide customers selections and application guidance without delay.

—— Provide on-site guidance

The service team is fully committed to assisting customers in solving product application problems. For users with complex situations, we will have a team be on-site for better understanding and help users solve problems face-to-face.
Quality
We strongly believe that --- Product quality is the foundation of the company; Advanced technology is the guarantee for high-quality products; R&D innovation is the driving force for the company's sustainable development; Service differentiation is the core competitive of market. The company carries to TQM system and has conferred with ISO9001 and ISO14001 certificates. With advanced equipment, production technology and DCS process control system, products quality is high and stable.


We adhere to the tenet of Quality is First, and regard the Zero-defect product, Zero-defect quality and Zero-defect services as our supreme goal.High-quality and environmentally-friendly raw materials, from the source, ensure high stability and excellent quality of each batch of products.QC department is applying strict standard to insure from raw materials to final products the quality is over the standard.We have full set of inspection machines in the lab and all the stuff are well trained.
The warehouse has a large fixed inventory, long-term supply capacity, quick response, solving customer's sudden problems, fast delivery.


Owing to the outstanding product quality, sincere service and skilled knowledge, we have won the customer praise and approval at home and abroad.