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A window is an opening in a wall, door, roof or vehicle that allows the passage of light, sound, and/or air.

What is the difference between PVC doors & windows and steel doors & windows?

Update:04 Aug 2016
Summary:

PVC plastic doors and windows are widely known in China […]

PVC plastic doors and windows are widely known in China as plastic steel doors and windows. Plastic doors and windows are made of polyvinyl chloride (PVC) resin as the main raw material, plus a certain proportion of stabilizers, colorants, fillers, impact modifiers, UV rays. An auxiliary agent such as an absorbent (screening agent) is extruded through a molding material.
The frame fan of the door and window is made by cutting, welding, etc., and the door and window are made by fitting accessories such as sealing strips, tops, hardware, etc., in order to enhance the rigidity of the profile, the reinforcement steel (steel) needs to be added in the cavity of the profile exceeding a certain length. Lining), this kind of door and window is called plastic door and window.
According to the characteristics of the profiles, the profiles are roughly divided into European and American.
European-style doors and windows are characterized by the fact that the profile formulation still uses traditional lead-salt heat stabilizers, and a few countries and enterprises have begun to adopt environmentally-friendly profiles of organotin heat stabilizers; the main force profile sections are generally designed as three or four main chambers. The total number of chambers is 6-8, and the wall thickness is generally 2.5-3.0 mm.
The door and window adopts the fan-box structure, the fan material has a large section, and is equipped with a pulley, which can be removed; the interior glass is installed, and the dry method is inlaid; the window opening is mainly opened in the foreign country, and a small number of sliding windows are adopted.
American doors and windows: mainly adopt environmentally friendly organotin-based heat stabilizers for its formulation, avoiding the disadvantages of lead salt toxicity during production, processing and use; developing into multi-cavity sections, and secondly reducing the wall thickness of profiles, generally 1.65~ 1.80mm; at the same time increase the number of internal reinforcement steel and chamber, the chamber is generally 9 to 13. In addition to reducing the strength of the profile, it also improves the insulation and sound insulation.
The sliding window is a frame fan, which improves the sealing and safety performance, eliminates the fan pulley, reduces the cross section of the fan material, and improves the lighting performance of the window. Standard installation methods for lifting windows and new mounting wings have been developed.
In addition, there are steel-plastic co-extruded doors and windows in the market, which is a new material for plastic and steel machinery.