Appearance quality: The appearance of the curtain wall panel should be neat and tidy. The non-decorative surface does not affect the damage of the product. The appearance quality of the decorative surface should meet the requirements of Table 1.
Dimensional tolerance: The allowable deviation of the size of the curtain wall panel should meet the requirements of Table 2. The allowable deviation of the dimensions of the special specification can be agreed between the supplier and the buyer. The thickness of the aluminum of the curtain wall and the thickness of the coating shall comply with the requirements of Table 3. The performance of the curtain wall panel should meet the requirements of Table 4.
Fire performance requirements
According to the fire level, it is divided into ordinary type and fireproof type aluminum-plastic composite board. At present, the national curtain wall standard has no special requirements for fireproof level for aluminum-plastic composite board products for building exterior wall.
(1) Ordinary aluminum-plastic composite board: Most of the aluminum-plastic composite board products for exterior curtain wall and roofing on the market are common type.
The core layer of the common aluminum-plastic composite board is made of low-density polyethylene (LDPE), and the finished core layer is black.
(2) Flame-retardant aluminum-plastic composite panels are further classified into a flame retardant grade (C grade) and a quasi-combustible grade (B grade).
Class 1C fireproof aluminum-plastic composite board: using halogen-free low-smoke flame-retardant polyethylene core layer.
Class 2B fire-resistant aluminum-plastic composite board: the core layer is made of aluminum hydroxide as the main component (content is up to 90%), and the color is usually white or grayish white.
Implementation of the standard GB/T 17748 "aluminum-plastic composite board"
GB8624-2006 "Building Materials and Combustion Performance Classification"
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