"In addition to the multiple cities in China, there are several foreign cities that have come here for inspection, and even have the intention to communicate in depth," said Huang Liqiang, deputy general manager of Hangzhou Communications Group.
Zhang Liqiang, deputy general manager of Hangzhou Public Bicycle Company, stated that the technology export service market is still gradually expanding. Hangzhou has also set up Jintong Public Bicycle Technology Development Co., Ltd., which is in charge of this project. Currently, due to technical output, it has realized more than 60 million yuan of income. In addition, Hangzhou has introduced concepts such as the operation of solar energy and wireless networks for the Vancouver public bicycle system, which is currently designing a planning scheme.
In May 008, Hangzhou launched an intelligent public bicycle system that rented and fully self-serviced. The bicycles rented at each fixed car rental point can be rented and returned, and the rental car is free for one hour and the rental fee is 1 yuan for 1-2 hours. 2-3 hours within 2 hours, more than 3 hours 3 yuan / hour; where the bus POS machines in the 90 minutes from the ride to rent a public bike, the free time can be extended to 90 minutes.
Polyester polyols are the important raw materials of coating, adhesives, elastomer and foam.
Polyester polyols can be divided into aromatic polyols and aliphatic polyols because of the acid and polyols.
Aromatic polyols are mostly used in preparing PU rigid foam which foam has great thermal insulation ability.
Aliphatic polyols with different raw materials show different performance.
No mater aromatic polyols or aliphatic polyols, we can provide the special products according to customers` requirement.
Polyester polyol is a type of polyol that is derived from the reaction between a polyol (such as glycerol or ethylene glycol) and a dicarboxylic acid (such as adipic acid or phthalic anhydride). It is commonly used as a raw material in the production of polyurethane foams, coatings, adhesives, and elastomers.
Polyester polyols have several advantages over other types of polyols. They have good chemical resistance, mechanical properties, and thermal stability. They also have low toxicity and are environmentally friendly. Additionally, polyester polyols can be easily modified to achieve desired properties, such as increased flexibility or flame retardancy.
Polyester polyols are typically liquid at room temperature and have a high molecular weight. They can be further reacted with isocyanates to form polyurethane materials, which have a wide range of applications in various industries, including automotive, construction, and furniture.
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