1. Little wonder that the material used to keep the rooms warm was polyurethane foam, a material that can easily catch fire and once on fire emits toxic gases.
2. A construction plan obtained by China Daily from Jiayi shows the company was using rigid polyurethane foam to improve the building's energy efficiency.
3. The same technology using vacuum insulation and rigid polyurethane foam sheets has also been brought to China.
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4. Isocyanates are used to produce flexible polyurethane foam used in upholstery, mattresses and car seats.