This standard specifies the index values, test methods and inspection rules for formaldehyde emission of wood-based panels and finishing products (including floorboard and wallboard, etc.) used for indoor decorating and refurbishing.
This standard is applicable to various wood-based panels and finishing products for indoor decorating and refurbishing use that release formaldehyde.
2 Normative References
The following standards contain provisions which, through reference in this text, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding correction to), or revisions of, any of these publications do not apply. However, the parties whose enter into agreement according to this standard are encouraged to research whether the latest editions of these documents are applied or not. For undated references, the latest edition of the normative document is applicable to this standard.
GB/T 17657-1999 "Test Methods of Evaluating the Properties of Wood-based Panels and Surface Decorated Wood-based Panels"
3 Terms and Definitions
The following terms and definitions are applicable to this standard.
3.1
Formaldehyde emission——the perforator test value
The formaldehyde amount extracted from 100g absolute dry wood-based panels that is determined by perforator method.
3.2
Formaldehyde emission——the desiccator test value
The formaldehyde amount released from the specimen into the absorption solution (distilled water) that is determined by desiccator method.
3.3
Formaldehyde emission——the chamber test value
The formaldehyde amount released from the specimen into the air at the steady state that is determined with the chamber as specified in this standard.
3.4
Volume of the chamber
The total volume in chamber with no load.
3.5
Loading rate
The ratio between the total surface area of specimen and the volume of the chamber.
3.6
Air exchange rate
The ratio between the air volume per hour passing through the chamber and the volume of the chamber.
3.7
Air velocity
The air velocity nearby the specimen surface in the chamber.
4 Classification
In accordance with the test methods, the formaldehyde emission is classified into:
a) Formaldehyde emission by perforator method (hereinafter referred to as "the perforator test value");
b) Formaldehyde emission by desiccator method (hereinafter referred to as "the desiccator test value");
c) Formaldehyde emission by chamber method (hereinafter referred to as "the chamber test value");
