# Air pillow#

The name of the project is Ha Er Bin Wanda square (ETFE&PTFE Air pillow). Its membrane area is 38750 square meters and it took 108 days to complete.

With the development of space structure, membrane structure has been widely used in large-span space structure due to its flexible and changeable architectural shape and light-weight and high-strength structural characteristics.

With the successful research and development of ETFE (Ethylene Tetra Fluro Ethylene), a new type of membrane structure ---ETFE air pillow membrane structure gradually enters people's sight with its beautiful shape and good stress performance, and is developing rapidly. Become one of the most important membrane structure forms at present.

In the traditional sense, membrane structures can be divided into tensile membrane structures, inflatable membrane structures, and skeleton membrane structures according to the force characteristics. Among them, the inflatable membrane structure can be divided into an air-bearing membrane structure and an inflatable membrane structure.

The air pillow membrane structure originated from the inflatable membrane structure. The inflatable membrane structure is like a balloon, wrapping the membrane into a closed member, inflating the inside of the membrane member, causing the membrane to generate tension, thereby having a certain rigidity, and combining multiple membrane members to form an overall force system.

Our project is an air pillow membrane structure. This structure does not need to maintain different indoor and outdoor air pressures, and has good comfort. It has light weight, light transmission, heat insulation, corrosion resistance, weather resistance, self-cleaning, etc. Performance and mechanical properties are also excellent, and are widely used in large public buildings.