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GB/T 18103-2022 PDF in English


GB/T 18103-2022 (GB/T18103-2022, GBT 18103-2022, GBT18103-2022)
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GB/T 18103-2022: PDF in English (GBT 18103-2022)

GB/T 18103-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 79.080
CCS B 70
Replacing GB/T 18103-2013
Engineered Wood Flooring
实木复合地板
ISSUED ON: DECEMBER 30, 2022
IMPLEMENTED ON: JULY 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 7
4 Classification ... 9
5 Requirements ... 10
5.1 Requirements for Raw Materials ... 10
5.2 Requirements for Appearance Quality ... 11
5.3 Specifications, Dimensions and Deviations ... 13
5.4 Physical and Chemical Properties ... 14
6 Inspection Methods ... 15
6.1 Inspection Method for Appearance Quality of Planar Engineered Wood Flooring ... 15
6.2 Inspection Methods for Specifications, Dimensions and Deviations of Planar
Engineered Wood Flooring ... 16
6.3 Inspection Methods for Physical and Chemical Properties of Planar Engineered Wood
Flooring ... 20
6.4 Inspection Method for Nonplanar Engineered Wood Flooring ... 24
6.5 Inspection Method for Engineered Wood Flooring for Underfloor Heating ... 24
7 Inspection Rules ... 24
7.1 Classification of Inspection ... 24
7.2 Sampling Method and Determination Principle ... 25
7.3 Comprehensive Determination ... 28
7.4 Inspection Report ... 28
8 Labeling, Packaging, Transportation and Storage ... 29
8.1 Product and Packaging Labeling ... 29
8.2 Packaging ... 29
8.3 Transportation and Storage ... 29
Bibliography ... 30
Engineered Wood Flooring
1 Scope
This document defines the terms and definitions of engineered wood flooring, and specifies the
classification, requirements, inspection methods, inspection rules, labeling, packaging,
transportation and storage.
This document is applicable to engineered wood flooring.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document
through the normative references in the text. In terms of references with a specified date, only
versions with a specified date are applicable to this document. In terms of references without a
specified date, the latest version (including all the modifications) is applicable to this document.
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/T 4823-2013 Defects in Sawn Timber
GB/T 15036.1-2018 Solid Wood Flooring - Part 1: Technical Requirements
GB/T 15036.2-2018 Solid Wood Flooring - Part 2: Examination Methods
GB/T 17657-2022 Test Methods of Evaluating the Properties of Wood-based Panels and
Surface Decorated Wood-based Panels
GB 18580 Indoor Decorating and Refurbishing Materials - Limit of Formaldehyde Emission of
Wood-based Panels and Finishing Products
GB/T 28999-2012 Multilaminar Decorative Veneer
GB/T 39600 Formaldehyde Emission Grading for Wood-based Panel and Finishing Products
GB/T 41547-2022 Wood-based Flooring for Underfloor Heating
HJ 571-2010 Technical Requirement for Environmental Labeling Products - Wood Based
Panels and Finishing Products
LY/T 1738 Plywood for Parquet
LY/T 1859 Antique Style Flooring
3 Terms and Definitions
What is defined in GB/T 4823-2013, and the following terms and definitions are applicable to
this document.
3.1 engineered wood flooring
Flooring made of solid wood panels or veneers (including restructured decorative veneers) as
the panel, solid wood panels, veneers or plywood as the core layer or bottom layer, and
laminated in different combinations.
NOTE: determine the name of floor tree species based on the panel tree specifies (except for
parquet floors with panels of different tree species).
3.2 two-layer engineered wood flooring
Two-layer-structured solid wood composite flooring with solid wood panels or veneers
(including restructured decorative veneers) as the panel, and solid wood panels or veneers as
the bottom layer.
3.3 three-layer engineered wood flooring
Three-layer-structured solid wood composite flooring with solid wood panels or veneers
(including restructured decorative veneers) as the panel, and solid wood panels as the core layer
and veneers as the bottom layer.
3.4 multi-layer engineered wood flooring
Multi-layer (with more than 3 layers) structured solid wood composite flooring with solid wood
panels or veneers (including restructured decorative veneers) as the panel, and plywood as the
base material, or solid wood panels or veneers (including restructured decorative veneers) as
the panel, and solid wood panels or veneers as the core layer or bottom layer.
3.5 nonplanar engineered wood flooring
Solid wood composite flooring with uneven surfaces, such as: saw marks and drawings, etc.
3.6 classic tongue-and-groove joint engineered wood flooring
Solid wood composite flooring with right-angled tenons and grooves on the sides and ends.
3.7 interlocking joint engineered wood flooring
Solid wood composite flooring with locking sides and ends.
NOTE: after the interlocking flooring is spliced, it constitutes a physical barrier to prevent
separation from vertical seams and parallel to the floor surface.
3.18 nib
Granular debris adhering to the surface of the paint film.
3.19 film abrasion resistance
An indicator of the abrasion resistance of the paint film on the surface of solid wood composite
flooring, which is expressed by the amount of paint film wear loss after a certain number of
revolutions of relative friction between a grinding wheel of a certain particle size and the surface
of the paint film.
3.20 size of the surface layer
The length and width of the solid wood composite flooring surface, excluding the tongue.
3.21 light fastness
The capability of a product surface to maintain its original color under sunlight or artificial light.
[source: GB/T 18259-2018, 3.4.80]
3.22 locking strength
The capability of the floor lock connection part to resist lateral (perpendicular to the lock
connection seam and parallel to the panel surface) pulling force.
3.23 total volatile organic compounds; TVOC
Volatile organic compounds sampled by Tenax GC or Tenax TA, analyzed on a non-polar
chromatographic column (polarity index is less than 10), and with a retention time between n-
hexane and n-hexadecane.
[source: HJ 571-2010, 3.2]
4 Classification
4.1 Classification in accordance with the panel material:
---engineered wood flooring with natural whole veneer as the panel;
--- engineered wood flooring with naturally spliced (including parquet) veneers as the
panel;
--- engineered wood flooring with restructured decorative veneers as the panel;
--- engineered wood flooring with toned veneers as the panel.
4.2 Classification in accordance with the structure:
---two-layer engineered wood flooring;
---three-layer engineered wood flooring;
---multi-layer engineered wood flooring.
4.3 Classification in accordance with the coating mode:
---oil-finished engineered wood flooring;
---paint-finished engineered wood flooring;
---unfinished engineered wood flooring.
4.4 Classification in accordance with the surface shape:
---planar engineered wood flooring;
---nonplanar engineered wood flooring.
4.5 Classification in accordance with whether it is suitable for ground radiant heating places:
---engineered wood flooring for non-underfloor heating;
---engineered wood flooring for underfloor heating;
4.6 Classification in accordance with whether it is locked and spliced:
---interlocking joint engineered wood flooring;
---classic tongue-and-groove joint engineered wood flooring.
5 Requirements
5.1 Requirements for Raw Materials
5.1.1 Panel
5.1.1.1 Commonly used panel tree species: oak, walnut, cherry, ash tree, birch, maple, catalpa,
teak, tubular neem, elm, disc bean, longan, paraberlinia bifoliolata, Chinese oak, white ash
wood, etc. The use of different tree species is allowed for the panel of parquet engineered wood
flooring.
5.1.1.2 Panel thickness: the panel thickness of two-layer engineered wood flooring and three-
layer engineered wood flooring shall not be less than 2 mm; the panel thickness of multi-layer
engineered wood flooring shall not be less than 0.6 mm.
5.1.2 Solid wood panel
6.1.1.2 Steel ruler, with a division value of 0.5 mm.
6.1.2 Inspection of appearance quality of planar engineered wood flooring
6.1.2.1 Adopt visual inspection and measuring tools to inspect the appearance quality of the
floor surface item by item.
6.1.2.2 When adopting visual inspection, the visual distance shall be within 700 mm ~ 1,000
mm under natural light or near natural light (for example, 40 W fluorescent lamp) with an
illumination in the range of 300 lx ~ 600 lx. The inspection personnel shall have normal vision
(or corrected to normal vision), without color blindness or color weakness.
6.1.2.3 Inspect the floor piece by piece, and in accordance with the stipulations of 5.3, determine
its grade. When there is a dispute, three people shall jointly participate in the inspection, and
the majority of the same conclusions will be the inspection result.
6.2 Inspection Methods for Specifications, Dimensions and Deviations of Planar
Engineered Wood Flooring
6.2.1 Measuring tools
6.2.1.1 Steel measuring tape, with a division value of 1.0 mm; select the measuring range in
accordance with the size of the test piece.
6.2.1.2 Steel ruler, with a division value of 0.5 mm; select the measuring range in accordance
with the size of the test piece.
6.2.1.3 Micrometer, with a division value of 0.01 mm; select the measuring range in accordance
with the size of the test piece.
6.2.1.4 Digital display vernier caliper, with a division value of0.01 mm; select the measuring
range in accordance with the size of the test piece.
6.2.1.5 Feeler gauge, with a thickness of 0.01 mm ~ 1.00 mm.
6.2.1.6 Right angle square, 200 mm  300 mm, accuracy level 1.
6.2.2 Inspection of specifications, dimensions and deviations of planar engineered wood
flooring
6.2.2.1 Inspection of surface-layer net length deviation
The length of the floor refers to the net length (l) of the floor surface, measured with a steel
measuring tape on both sides of the floor width direction and 20 mm away from the edge of the
floor, accurate to 1 mm, as shown in Figure 1. Calculate the absolute value of the difference
between the nominal length (ln) and each length measured value (lm), accurate to 1 mm.
NOTE: nominal length (ln) is the length value in the labeled product specification model.
1 mm; during the measurement, the stripped part caused by wood defects, such as: cracks and
knots, etc., is not considered stripping.
6.3.3 Determination of moisture content
In accordance with the stipulations of 4.3 in GB/T 17657-2022, test 4 test pieces. The moisture
content of the floor is expressed as the arithmetic mean of the moisture content of the 4 test
pieces, accurate to 0.1%. The equilibrium moisture content of wood in the various provinces
(autonomous regions) and municipalities directly under the Central Government in China shall
comply with the stipulations of Appendix A in GB/T 15036.1-2018.
6.3.4 Determination of static bending strength and elastic modulus
6.3.4.1 Carry out the determination in accordance with the stipulations of 4.7 in GB/T 17657-
2022, the test piece does not need the equalization treatment. The span is 200 mm, and 6 test
pieces are tested.
6.3.4.2 The static bending strength of the floor is expressed as the arithmetic mean of the static
bending strength of 6 test pieces, accurate to 0.1 MPa.
6.3.4.3 Find the minimum value of the static bending strength of the 6 test pieces.
6.3.4.4 The elastic modulus of the floor is expressed as the arithmetic mean of the elastic
modulus of 6 test pieces, accurate to 10 MPa.
6.3.5 Determination of paint film adhesion
Carry out the determination in accordance with the stipulations of 4.57 in GB/T 17657-2022,
and the cutting spacing is 2 mm.
6.3.6 Determination of paint film hardness
Carry out the determination in accordance with the stipulations of 4.58 in GB/T 17657-2022.
6.3.7 Determination of film abrasion resistance
Carry out the determination in accordance with the stipulations of 3.3.2.2 in GB/T 15036.2-
2018.
6.3.8 Determination of surface contamination resistance
Carry out the determination in accordance with the stipulations of 4.44 in GB/T 17657-2022.
The contaminants are black coffee and 10% citric acid.
6.3.9 Determination of formaldehyde release
Carry out the determination in accordance with the stipulations of 4.60 in GB/T 17657-2022.
6.3.10 Determination of locking strength
wool standard sample together under sunlight. When the color difference between the exposed
and unexposed parts of the target blue wool standard sample reaches level 4 on the gray sample
card, terminate the exposure. For example, the light fastness level agreed by the supply-side
and the demand-side is level 3, when the discoloration of blue wool standard sample 3 reaches
level 4 on the gray sample card, terminate the exposure.
Compare the discoloration of the test piece with the discoloration of the target blue wool
standard sample for assessment. If the degree of discoloration of the test piece is not greater
than the discoloration of the target blue wool standard sample, then, the color fastness to light
is assessed as conforming to the agreed light fastness level (for example, assessed as
conforming to level 3). If the degree of discoloration of the test piece is greater than the degree
of discoloration of the target blue wool standard sample, then, the light fastness is assessed as
non-conforming to the agreed light fastness level.
6.3.12 Determination of total volatile organic compounds (TVOC)
Carry out the determination in accordance with the stipulations of Appendix A in HJ 571-2010.
6.4 Inspection Method for Nonplanar Engineered Wood Flooring
The inspection of formaldehyde release of nonplanar engineered wood flooring shall be carried
out in accordance with the stipulations of 6.3.9; the inspection of locking strength shall be
carried out in accordance with the stipulations of 6.3.10; the inspection of specifications,
dimensions, appearance quality, physical and chemical properties shall be carried out in
accordance with the stipulations of LY/T 1859.
6.5 Inspection Method for Engineered Wood Flooring for Underfloor Heating
For the inspection of the basic quality (excluding formaldehyde release) of engineered wood
flooring for underfloor heating, planar engineered wood flooring for underfloor heating shall
comply with the stipulations of 6.1, 6.2 and 6.3; nonplanar engineered wood flooring for
underfloor heating shall comply with the stipulations of 6.4; the inspection of floor heating
performance and formaldehyde release shall be carried out in accordance with the stipulations
of GB/T 41547-2022.
7 Inspection Rules
7.1 Classification of Inspection
7.1.1 Product inspection is divided into exit-factory inspection and type inspection.
7.1.2 The inspection items of exit-factory inspection are determined in accordance with the
product type (such as: planar engineered wood flooring, nonplanar engineered wood flooring
and engineered wood flooring for underfloor heating):
a) The inspection items of exit-factory inspection of planar engineered wood flooring
include appearance quality, specifications, dimensions and deviations, as well as
moisture content, impregnation stripping, paint film adhesion and film abrasion
resistance in physical and chemical properties;
b) The inspection items of exit-factory inspection of nonplanar engineered wood
flooring are determined in accordance with the stipulations of exit-factory inspection
of antique engineered wood flooring in LY/T 1859;
c) The inspection items of exit-factory inspection of engineered wood flooring for
underfloor heating are determined in accordance with the stipulations of 7.1.1 in GB/T
41547-2022.
7.1.3 Type inspection includes all relevant inspection items in Chapter 5. During normal
production, type inspection shall be carried out no less than once a year. Under one of the
following circumstances, type inspection shall be carried out:
a) When there are major changes in raw materials and production processes;
b) When production is resumed after suspension for more than 3 months;
c) When new products are put into production or transferred to another factory for
production;
d) When the quality supervision department proposes a request for type inspection.
7.2 Sampling Method and Determination Principle
7.2.1 Principle of group batch
Products of the same batch, same specifications and same category are considered as one batch.
7.2.2 Sampling method and determination principle of planar engineered wood flooring
and nonplanar engineered wood flooring
7.2.2.1 Sampling method and determination principle of appearance quality
7.2.2.1.1 Adopt the secondary sampling scheme of normal inspection in GB/T 2828.1-2012.
The inspection level is II, and the acceptance quality limit AQL = 4.0, as shown in Table 5. The
inspection sample is n1, when the number of disqualified d1  Ac1, accept, when d1  Re1, reject;
if Ac1 < d1 < Re1, then, the inspection sample is n2, when the number of disqualified in the two
samples before and after d1 + d2  Ac2, accept, when d1 + d2  Re2, reject.
in the standards for labeled products, and the minimum value of any test piece is not less than
80% of the value specified in the standards, the floor specimen shall be determined as qualified
in the static bending strength, otherwise, it shall be determined as disqualified.
7.2.2.3.2.3 If at least 5 of the 6 impregnation stripping test pieces of the floor specimen satisfy
the requirements in the standards for labeled products, the floor specimen shall be determined
as qualified in impregnation stripping, otherwise, it shall be determined as disqualified.
7.2.2.3.2.4 If the impregnation stripping, paint film adhesion, film abrasion resistance, surface
contamination resistance, paint film hardness, formaldehyde release, light fastness and total
volatile organic compounds (TVOC) of the floor specimen satisfy the requirements in the
standards for labeled products, the floor specimen shall be determined as qualified in the above-
mentioned properties, otherwise, it shall be determined as disqualified.
7.2.2.3.2.5 When the physical and chemical properties of the floor specimen are all qualified in
the inspection, the batch of products shall be determined as qualified in the physical and
chemical properties, otherwise, it shall be determined as disqualified.
7.2.3 Sampling method and determination principle of engineered wood flooring for
underfloor heating
In accordance with the stipulations of 7.3 in GB/T 41547-2022.
7.3 Comprehensive Determination
When the inspection results of appearance quality, specifications, dimensions, deviations,
physical and chemical properties and underfloor heating performance (if applicable) satisfy the
requirements in the standards for labeled products, the batch of products shall be determined as
qualified, otherwise, the batch of products shall be determined as disqualified.
7.4 Inspection Report
The content of the inspection report shall include:
a) All details, such as: the name, category and level of the product being inspected, the
standard, on which, the inspection is based, as well as the inspection category and
inspection items;
b) Inspection results and conclusions;
c) Various abnormalities that occurred during the inspection process and problems that
need to be explained.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.