GB/T 20808-2022 English PDF (GBT20808-2022)

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GB/T 20808-2022: Paper towel
GB/T 20808-2022
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 85.080.20
CCS Y 39
Replacing GB/T 20808-2011
Paper Towel
纸巾
ISSUED ON: APRIL 15, 2022
IMPLEMENTED ON: MAY 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 ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Classification ... 7
5 Raw Materials ... 7
6 Requirements ... 8
7 Test Method ... 11
8 Inspection Rules ... 15
9 Marking and Packaging ... 18
10 Transportation and Storage ... 20
Appendix A (normative) Determination of Dispersibility ... 21
Appendix B (normative) Determination of Powder Shedding Rate ... 23
Appendix C (normative) List of Carcinogenic Aromatic Amines ... 25
Appendix D (normative) Determination of Decolorization Performance ... 26
Paper Towel
1 Scope
This document specifies the classification, raw materials, requirements, test methods,
inspection rules, marking, packaging, transportation and storage of paper towels.
This document is applicable to various facial tissues, paper napkins and paper handkerchiefs
used in daily life.
This document does not apply to wet wipes, paper hand towels and kitchen towels.
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 450 Paper and Board - Sampling for Testing and Identification of Machine and Cross
Direction, Wire Side and Felt Side
GB/T 461.1 Paper and Board - Determination of Capillary Rise (Klemm method)
GB/T 462 Paper, Board and Pulp - Determination of Moisture Content of Analytical Sample
GB/T 465.2 Paper and Board - Determination of Tensile Strength after Immersion in Water
GB/T 742 Fibrous Raw Material, Pulp, Paper and Board - Determination of Residue (ash) on
Ignition at 575 C and 900 C
GB/T 1541 Paper and Board - Determination of Dirt
GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1: Sampling Schemes
Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot Inspection
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 7974 Paper, Board and Pulps - Measurement of Diffuse Blue Reflectance Factor - D65
Brightness (Diff / Geometry, Outdoor daylight conditions)
GB/T 8942 Paper - Determination of Softness
GB/T 10739 Paper, Board and Pulps - Standard Atmosphere for Conditioning and Testing
4 Classification
4.1 In accordance with the purposes, paper towels are classified into facial towels (facial tissues),
paper napkins (napkins) and paper handkerchiefs (handkerchief papers).
4.2 In accordance with the raw materials, paper towels are classified into primary wood pulp
(fiber) paper towels, primary non-wood pulp (fiber) paper towels and primary mixed pulp (fiber)
paper towels.
NOTE 1: primary wood pulp (fiber) paper towels refer to paper towels whose fiber raw material is
100% primary wood pulp (fiber).
NOTE 2: primary non-wood pulp (fiber) (such as: straw pulp, bamboo pulp and bagasse pulp, etc.)
paper towels refer to paper towels whose fiber raw material is 100% primary non-wood
pulp (fiber).
NOTE 3: primary mixed pulp (fiber) paper towels refer to paper towels produced by mixing
primary wood pulp (fiber) and primary non-wood pulp (fiber).
4.3 In accordance with the product performance, paper towels are classified into ordinary paper
towels, soft paper towels, wet reinforced paper towels, dispersible paper towels and
moisturizing paper towels. Among them, the ordinary paper towels are further classified into
superior products and qualified products.
NOTE: moisturizing paper towels refer to paper towels that add a certain amount of moisturizing
ingredients and have a soft and smooth surface.
4.4 In accordance with the number of layers, paper towels are classified into single-layer,
double-layer and multi-layer.
4.5 In accordance with the color, paper towels are classified into white paper towels, natural-
color paper towels and colored paper towels. Among them, colored paper towels are further
classified into printed paper towels and dyed paper towels.
4.6 In accordance with the process, paper towels are classified into embossed paper towels and
non-embossed paper towels.
5 Raw Materials
5.1 Paper towels shall use non-toxic and harmless raw materials. During printing, water-based
inks shall be used. Paper towels shall use primary fiber raw materials, such as: wood, grass and
bamboo, etc. Any recycled papers, paper prints, paper products and other recycled fibrous
substances shall not be used as raw materials, and deinking agent shall not be used.
5.2 If essence is added during the production of paper towels, the essence used shall comply
with the stipulations of GB/T 22731. If moisturizing ingredients are added during the
7 Test Method
7.1 Sample Collection and Treatment
Sampling shall be conducted in accordance with GB/T 450.
When determining the quantification and quantitative deviations, transverse suction height,
transverse tensile strength, longitudinal wet tensile strength, softness, powder shedding rate and
dimensional deviations, the sample treatment and the standard atmospheric conditions of the
test shall comply with the stipulations of GB/T 10739.
7.2 Quantification and Quantitative Deviations
The quantification and quantitative deviations shall be determined in accordance with GB/T
24328.5, and the results shall be expressed in single-layer.
7.3 D65 Brightness
The D65 brightness shall be determined in accordance with GB/T 7974.
7.4 Migratable Fluorescent Substance
Place a stack of specimen (thick enough to be opaque) and a fluorescent standard sample (with
a fluorescent brightness of 0.40% ~ 0.60%) together at a distance of about 20 cm under an
ultraviolet lamp with wavelengths of 254 nm and 365 nm; compare and observe the
fluorescence phenomenon on both sides of the specimen and the fluorescent standard sample.
If the fluorescence phenomenon of the specimen is weaker than that of the fluorescent standard
sample, then, end the test and report the test result as no migratable fluorescent substance; if
the fluorescence phenomenon of the specimen is stronger than that of the fluorescent standard
sample, then, in accordance with Chapter 5 of GB/T 27741-2018, conduct the determination of
the migratable florescent substance.
7.5 Ash Content
The ash content shall be determined in accordance with GB/T 742, and the burning temperature
is (575  25) C.
7.6 Transverse Suction Height
The transverse suction height shall be determined in accordance with GB/T 461.1. The test
duration is 100 s. Conduct the determination in accordance with the number of layers of finished
products.
7.7 Transverse Tensile Strength
The transverse tensile strength shall be determined in accordance with GB/T 24328.3. The
width of the specimen is 15 mm, and the clamping distance is 100 mm. For single-layer, double-
layer or multi-layer specimens, determine in accordance with the number of layers of finished
products.
NOTE: if the length of the specimen cannot satisfy the test using a 100 mm clampi...