AS NZS 1859.3:2017 pdf free download – Reconstituted wood-based panels – Specifications
1.5 CLASSIFICATION
Decorative overlaid wood panels shall be classified as follows:
(a) Low pressure melamine (LPM) Manufactured by directly applying partially uncured amyloplast resin impregnated papers to one or both faces of wood panel substrates and achieving bonding and curing in the same process using heat and pressure but
without the use of an adhesive.
(b) PVC film Manufactured by roll laminating PVC film to one or both faces of wood panel substrates using an adhesive to bond the PVC film to the substrate.
(c) Paper foils Manufactured by laminating paper foils to one or both faces of wood panel substrates using an adhesive to bond the foil to the substrate.
(d) Wood veneer Manufactured by gluing wood veneers to both faces of wood panel substrates, using a suitable adhesive to match the performance of the substrate as specified in Section 6.
2.1 DIMENSIONAL TOLERANCES
When determined in accordance with AS/NZS 4266.1, the actual dimensions of substrate panels shall comply with the requirements of AS/NZS 1859, Parts 1, 2 and 4, as applicable.
NOTES:
1 Flatness requirements are only applicable to decorative overlaid panels at time of delivery from manufacturer. Numerous factors, including changes in temperature and relative humidity in storage and fabrication areas at building sites, may cause boards and panels to bow or twist irreversibly.
2 Care should be taken in specifying unbalanced overlaid panels, that is, panels laminated on one side only, or with significantly different overlays on each side. Supply of panels laminated on one side with PVC film, paper foils, or melamine should be agreed between buyer and supplier.
2.2 APPEARANCE
2.2.1 Defects
When inspected according to AS/NZS 4266.2, the surface layer of panels shall appear to be continuous. The following defects are permitted:
(a) Spots, dirt and similar surface defects The admissible size of such defects is based on a maximum area equivalent to 1.0 mm 2 /m 2 of panel and is proportional to the panel size under inspection. The total admissible area of contamination may be concentrated in one spot or dispersed over an unlimited area of smaller defects provided Item (c) below is complied with.
(b) Fibres, hairs, scratches The admissible area of defects is based on a maximum contaminated length equivalent to 10 mm 2 /m 2 of panel and is proportional to the panel size under inspection. The total admissible area of contamination may be concentrated in one spot or dispersed over an unlimited area of smaller defects provided Item (c) below is complied with.
(c) Combination of surface defects When defect types described in Items (a) and (b) above occur in the same panel, then the maximum level for each of the two types of defect shall not exceed half of the level prescribed in Items (a) and (b) above. NOTE: These permitted surface defects are consistent with requirements for high pressure decorative laminate according to AS/NZS 2924.1.