Shanghai Tunqiao Special Rubber Factory Co., Ltd. is a professional waterproof rubber manufacturer engaged in the development and production of underground engineering rubber water stop belts, shield pipe sheet rubber seal gaskets, water expansion rubber series, water stop putty series and supporting auxiliary materials. In the late 1990s, the company began to independently develop and produce waterproof materials such as shield tube rubber sealing gaskets and water-expanding rubber. The product quality is stable and reliable, and the price is moderate, and it has successfully replaced similar imported products.

The company began to develop and produce EPDM porous elastic sealing products in 1997 to replace the elastic sealing products of Phoenix, Germany. In 1998, the EPDM elastic rubber seal produced by the company was tried in the interval tunnel of Shanghai Metro Line 2. The water stopping effect was good, and the price had great advantages compared with imported products, and it achieved consistency between the owner, design unit and construction unit. Acknowledgement. In 1999, the EPDM elastic seal produced by the company was officially used and fully promoted in the first Shanghai Bund pedestrian sightseeing tunnel in China, which achieved good social and economic benefits. This product has also achieved good water stopping effects in engineering applications such as Beijing Liangmahe drainage tunnel, Shanghai Metro, Shanghai Dalian Road Cross-River Tunnel. In recent years, the company's elastic seals have been widely supplied to the construction of domestic urban subways such as Shanghai Metro, Nanjing Metro, Suzhou Metro, Fuzhou Metro, Xiamen Metro, Hangzhou Metro, Tianjin Metro, etc., and have achieved good reputation among users. The company also jointly developed and developed elastic sealing products used in large cross-river tunnel pipe sheets with major design institutes. Through theoretical calculations such as finite element, as well as hydraulic pressure simulation, compressive stress simulation, compression creep simulation experiments, etc., it is optimized to be suitable for different waters. Pressure, various elastic sealing gasket section forms under different geological conditions have accumulated a large amount of water stop theoretical basis and practical production experience of elastic sealing products.

The company maintains close cooperation with design institutes, research institutes and key universities to continuously develop new products and maintain technologically advanced and trustworthy quality. The company also participated in the drafting and formulation of national standards GB 18173.2-2014 "Polymer Waterproof Material Part 2 Water Stop Belt", GB/T 18173.3-2014 "Polymer Waterproof Material Part 3 Water Expansion Rubber", GB 18173.4-2010 "High Molecular waterproofing materials Part 4: Rubber sealing gasket for tunnel pipe sheets by shield method.