GB/T 7911-2024 High-pressure decorative laminates made from thermosetting resins impregnated sheets (HPL)
1 Scope
This document specifies the classification, labeling and application areas, requirements, inspection rules, and marking, packaging, transport and storage of high-pressure decorative laminates made from thermosetting resins impregnated sheets (HPL).
This document is applicable to the production, trade and inspection of high-pressure decorative laminates made from thermosetting resins impregnated sheets (HPL).
2 Normative references
The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 1040.2-2022 Plastics - Determination of tensile properties - Part 2: Test conditions for moulding and extrusion plastics
GB/T 2828.1-2012 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB 8624-2012 Classification for burning behavior of building materials and products
GB/T 16422.1-2019 Plastics - Methods of the exposure to laboratory light sources - Part 1: General guidance
GB/T 16422.2-2022 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources
GB/T 16422.3-2022 Plastics - Methods of exposure to laboratory light sources - Part 2: Fluorescent UV lamps
GB/T 17657-2022 Test methods of evaluating the properties of wood-based panels and surface decorated wood-based panels
GB/T18259-2018 Terminology for wood-based panels and their surface decoration
GB 18580-2017 Indoor decorating and refurbishing materials - Limit of formaldehyde emission of wood-based panels and finishing products
GB/T 19367-2022 Determination of dimensions of wood-based panels
GB/T 20284-2006 Single burning item test for building materials and products
GB/T 20285-2006 Toxic classification of fire effluents hazard for materials
GB/T 31762-2015 Determination of phenol emission from wooden materials and their furnishing products - Small chamber method
GB/T 39600-2021 Formaldehyde emission grading for wood-based panel and finishing products
LY/T 3230-2020 Classification of volatile organic compounds emission contents from wood-based panels and their finishing products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in GB/T 18259-2018 and the following apply.
3.1
high-pressure decorative laminates made from thermosetting resins impregnated sheets
a kind of decorative material formed with a surface paper impregnated with amino thermosetting resin (mainly melamine resin), a decorative paper and a base paper impregnated with phenolic resin which are laminated and then subjected to the high pressure process
Note 1: They are called high-pressure decorative laminates (HPL) for short, and include ordinary, floor, outdoor, pearlescent, metal, colored core, and metal reinforced core laminates.
Note 2: The high pressure process refers to a hot pressing process in which the thermosetting resin flows and cures under high temperature (≥ 120°C) and high pressure (≥ 5 MPa) so that the density of the laminate is not less than 1.35 g/cm3.
[Source: 18259-2018, 3.4.60, modified]
3.2
surface layer
uppermost decorative layer consisting of one or more layers of fibrous material (typically paper) impregnated with an amino thermosetting resin (mainly melamine resin) or other curable resin, or of other decorative material, such as metal foil
3.3
core layer
layer consisting of a fibrous material (typically paper) impregnated with a thermosetting resin (mainly phenolic-based resin) or other cured resin, or reinforced by a metal layer, a metal mesh, and other non-thermosetting resin treated material
3.4
pearlescent laminate
high-pressure decorative laminates whose surface material is composed of decorative paper impregnated with melamine resin and can show a pearlescent effect
3.5
metal laminate
high-pressure decorative laminate whose surface layer is composed of a thin layer of metal protected by painting or anodizing treatment (aluminum)
Note: Thin-layer metals includes aluminum, steel or copper.
3.6
colored core laminate
high-pressure decorative laminate in which the core layer is made of cellulose fibers (typically paper) impregnated with a thermosetting resin (mainly amino resin), and obtains a color effect by coloring the fibers or resins, and obtains a semi-transparent effect by using bleached fibers or transparent resins
3.7
metal reinforced core laminate
high-pressure decorative laminate whose core layer is made of a metal layer or cellulose fibers impregnated with a metal mesh and a thermosetting resin (phenolic or aminoplast resin) (typically paper) to improve mechanical properties, fire resistance, permeability and edge beautification
4 Classification
4.1 By thickness:
a) Thin laminates —— single-faced laminates with a thickness < 2 mm, which shall be used after being compounded with the substrate;
b) Thick laminates —— single- or double-faced laminates with a thickness ≥ 2 mm, which may be used alone or after being supported.
4.2 By application:
a) Ordinary laminates —— including thin type and thick type, often used as the main material for furniture manufacturing and decoration;
b) Floor laminates —— with high wear resistance, and used as a floor after being bonded with the substrate;
c) Outdoor laminate - thick laminates for outdoor use.
4.3 By decorative layer:
a) Ordinary laminates —— with decorative surface without special treatment, and without special decorative effect;
b) Pearlescent laminates —— with pearlescent effect;
c) Metal laminates —— with metal gloss.
4.4 By core material:
a) Colored core laminates;
b) Metal reinforced core laminates.
Contents Foreword I 1 Scope 2 Normative references 3 Terms and definitions 4 Classification 5 Labeling and application areas 6 Requirements 7 Test methods 8 Inspection rules 9 Marking, packaging, transport and storage
