In traditional board industry, uses adhesive is 3 aldehyde glue, namely formaldehyde + urea (or phenol, 3 get together cyanogen amine or its combination) , apparently formaldehyde is among them composite deck roofing indispensable raw material, and it is reversible that its react, in using a process for a long time of plank, can continual release formaldehyde.

2008 committee of resource of American California air make anti-cracking composite wall panel (CARB) the transmission of issued toxic substance air that reduces compound wood formaldehyde to discharge controls measure (ATCM) , this code already was brought into California act. This act is the rigiddest standard that the quantity releases about the formaldehyde of composite tiles outdoor in singapore compound wood on the world.

This act adds board to having aldehyde (NAF) the definition is: Do not use any adhesive that contain formaldehyde part in the manufacturing process of plank (No-added-formaldehyde Based Resin) . plastic flooring boards NAF is the attestation of most strict the exempt that do not have aldehyde in this act. When the plank that obtains this attestation or market of United States of furniture goods exit, need not undertake formaldehyde detects.