By applying a new modified PVC material,we have studied and developed the modifying character for PVC plastic air door on the basis of the principles and the methods of the design for the mine air door in the pater.

Flashing can effectively prevent leakage of plastic doors and windows;

In light of national standard and professional regulations and based on the charateristics of plastic doors and windows, the software was designed for wind load calculation, window frame strength correction, glass strength correction and screw strength correction.

Current situation and development strategy of China's PVC plastic window and door products;

Scientific accounting for cutting of plastic window and door profile;

The application of polyurethane PU foaming joint filler in plastic door and window;

The effect and development tendency of the plastic door and window on the architectural energy-saving;

Plastic door & window is generally acquainted by the market, and is greatly supported by the nation s policy orientation,The production capacity is increasing rapidly, however, there are still some problems and hidden troubles.

The moment of inertia for plastic door & window with it sross-section is disused.

Based on three modes of heat transmission,this paper analyzed the efficient superiorities of plastic door & window in architectural field.

Forms of structure for the plastic door are described and suggestions are presented for application of theplastic door.