The properties of high quality polyurethane polymers are very suitable for aviation industry.

2019-08-05 09:49:17

The aviation industry has long been using all kinds of high energy materials that can withstand extreme environments, and foam is one of them. Polyethylene foam, metal foam and polyurethane foam can maintain stable performance in high temperature environment, reduce air leakage, as sound barriers, and make the aircraft operate better in flight and avoid potential hazards.

Polyurethane materials are widely used in spacecraft, such as flight deck mats, cabin walls, aircraft ceilings, indoor aircraft classification, aircraft kitchens and toilets. Waterborne polyurethane coatings can be used for aircraft exterior paints, while polycarbonate or acrylic acid can also be used for aircraft glass windows.

Generally speaking, the characteristics of polyurethane polymers are very suitable for the aerospace industry, which is conducive to promoting the sustained growth of the aerospace market.

The development of soft foam box type foaming small businesses is booming. There are hundreds of automatic casting rigid foam insulation production lines, sandwich panel rigid foam casting production lines, continuous method bulk soft foam production lines, molding flexible foam production lines, and thousands of tons of polyurethane coatings, adhesives and other production plants have ten Many. At this time, there are thousands of units engaged in the production, management, scientific research and development of polyurethane products and machinery and equipment in the whole country, as well as hundreds of larger-scale ones. By 2000, the annual output of polyurethane products had reached 1.02 million tons, and the average annual growth rate during 1991-1998 was more than 25%. But in the same period, the development of polyurethane raw materials in China is still lagging behind. Small-scale TDI production units have been introduced in Yinguang, Cangzhou and Taiyuan chemical fertilizer plants in Gansu Province. Most of the TDI and MDI raw materials are still heavily dependent on imports, and the annual import volume has risen sharply.

After more than ten years of research and experience accumulation, in the 21st century, with Yantai Wanhua as the representative, China's polyurethane production enterprises in the production scale, product types, technology and other fields began to make a comprehensive breakthrough, leading enterprises into the international arena. By 2017, there will be five domestic isocyanate enterprises in China, including Wanhua Chemical, Yinguang Gansu, Southeast Electrochemical, Cangzhou Chemical and Yantai Juli. Among them, Wanhua Chemical has 600,000 tons (Yantai) +1.2 million tons (Ningbo) MDI capacity, and has become a world-class polyurethane production enterprise with independent intellectual property rights. There are many polyether polyols production enterprises, mainly Shandong Dongda, Zhonghai Shell, Wanhua Chemistry and so on.

At the same time, China has become the world's largest production base of polyurethane raw materials and a large production and consumption market of polyurethane products. Polyurethane foam plastics have become an important variety of polyurethane materials. Its output accounts for more than 50% of the total amount of polyurethane products. Synthetic leather slurry, sole solution, polyurethane fiber and coatings also account for a large proportion. Its output, consumption and export volume rank first in the world. In 2017, China consumed 11.1 million tons of polyurethane products (including solvents) and 8.4 million tons of pure polyurethane resins.