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GB/T 17639-2023Geosynthetics - Synthetic filament spunbond and needlepunched nonwoven geotextiles (English PDF)

土工合成材料长丝纺粘针刺非织造土工布

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Issued by

State Administration for Market Regulation; Standardization Administration of China

Level / Type

National · Recommended

Issue date

May 23, 2023

Implementation date

December 1, 2023

Scope

GB/T 17639-2023 is the English-translated version of 土工合成材料长丝纺粘针刺非织造土工布.

GB/T 17639-2023 specifies the product classification, specifications, product code, technical requirements, test methods, inspection rules, packaging, storage, transportation and marking of filament spunbond needlepunched nonwoven geotextiles made from polyester or polypropylene by spinning, web laying and needlepunch consolidation.

Products are graded by nominal strength (6 to 54 kN/m for polyester, 6 to 56 kN/m for polypropylene) and identified by a code combining fibre, strength, width, mass per unit area and thickness, for example PET15-4.5-290-2.2.

Tables of basic requirements set limits for tensile strength, elongation at maximum load, CBR bursting strength, tearing strength, opening size, vertical permeability, width, mass and thickness deviations, with dynamic perforation, grab strength, acid and alkali resistance and UV resistance as agreed items, alongside appearance defect grading and test methods based on GB/T geosynthetics standards.

It replaces GB/T 17639-2008: polypropylene requirements were added, polyamide and other fibre types dropped, thickness added to the product code, the strength indicators renamed and revised, broken needle residues added to the defects, and delivery and type inspection introduced.

Issued on 23 May 2023, in force since 1 December 2023. Classification: ICS 59.080.70, CCS W59. The document runs to 10 pages, delivered complete in English translation.

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Document preview — GB/T 17639-2023

National Standard of the People's Republic of China

ICS: 59.080.70
Classification: W59
Replacing: GB/T 17639-2008

Issued by: State Administration for Market Regulation; Standardization Administration of China

ForewordI
1 Scope1
2 Normative references1
3 Terms and definitions2
4 Product classification, specifications and code2
4.1 Product classification2
4.2 Product specifications2
4.3 Product code2
5 Technical requirements2
5.1 Intrinsic quality2
5.2 Appearance quality4
6 Test methods5

Foreword

This document was drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part 1: Rules for the structure and drafting of standardizing documents.

This document replaces GB/T 17639-2008, Geosynthetics - Synthetic filament spunbond and needlepunched nonwoven geotextiles. Compared with GB/T 17639-2008, apart from structural adjustments and editorial changes, the main technical changes are as follows:

a) the types of raw material are specified in the scope (see Clause 1; Clause 1 of the 2008 edition);

b) a clause on terms and definitions has been added (see Clause 3);

c) the product classification is now by raw material into polyester and polypropylene; fibre types such as polyamide and polyethylene have been deleted, and the wording "shall be divided by structure into ordinary type and composite type" has been deleted (see 4.1; 3.1 of the 2008 edition);

d) the recommended specifications for polyester products have been changed and recommended specifications for polypropylene products have been added (see 4.2; 3.2 of the 2008 edition);

e) thickness has been added to the product code (see 4.3; 3.3 of the 2008 edition);

f) in the basic technical requirements for polyester filament spunbond needlepunched nonwoven geotextiles, "nominal breaking strength" has been changed to "nominal strength" and the specification values changed; "longitudinal and transverse breaking strength" has been changed to "longitudinal and transverse tensile strength" with adjusted requirements; "longitudinal and transverse elongation at nominal strength" has been changed to "longitudinal and transverse elongation at maximum load" with adjusted requirements; the requirements for CBR bursting strength and longitudinal and transverse tearing strength have been slightly adjusted; the thickness requirement has been deleted; two assessed indicators, thickness deviation rate and coefficient of variation of thickness, have been added; and four reference indicators, dynamic perforation, longitudinal and transverse breaking strength (grab method), UV resistance (xenon arc lamp method) and UV resistance (fluorescent UV lamp method), have been added (see Table 1; Table 1 of the 2008 edition);

g) basic technical requirements for polypropylene filament spunbond needlepunched nonwoven geotextiles have been added (see Table 2);

h) an assessment of broken needle residues has been added to the appearance defects (see Table 3; Table 2 of the 2008 edition);

i) the test methods have been adjusted in line with the changes in the intrinsic quality and appearance quality requirements (see Clause 6; Clause 5 of the 2008 edition);

j) delivery inspection, type inspection and inspection items have been added (see 7.1.1, 7.1.2 and 7.2).

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. The issuing body of this document shall not be held responsible for identifying any or all such patent rights.

This document was proposed by the China National Textile and Apparel Council.

This document is under the jurisdiction of the National Technical Committee on Textiles of Standardization Administration of China (SAC/TC 209).

Drafting organisations of this document: CTTC Inspection & Certification Co., Ltd.; Weifang Tuowang Industrial Co., Ltd.; Tiandingfeng Holdings Co., Ltd.; Sinochem (Beijing) Chemical Research Institute Co., Ltd.; Shanghai Investigation, Design & Research Institute Co., Ltd.; Yunnan Zhongchi Engineering Materials Co., Ltd.; Shandong Lutai New Materials Co., Ltd.; Hongxiang New Geo-material Co., Ltd.; Shandong Jingchuang New Material Technology Co., Ltd.; Shandong Chenghuijin Industrial Co., Ltd.; Jiangsu Hangaode Ruishiye Co., Ltd.; Guizhou Longxiang New Materials Co., Ltd.; Shandong Taiwei Engineering Materials Co., Ltd.; Tianjin Jianchang Environmental Protection Co., Ltd.; Zhongcheng Jiansheng (Shenzhen) Environmental Technology Co., Ltd.; Jiangsu Jinyongda Industrial Co., Ltd.; Tai'an Modern Plastics Co., Ltd.; Feicheng Lianyi Engineering Plastics Co., Ltd.; Shandong Dexuda Geotechnical Materials Co., Ltd.; Anhui Zhonglu Engineering Materials Co., Ltd.; China Nonwovens & Industrial Textiles Association.

Main drafters of this document: Liu Feifei, Ding Jinhai, Zhang Pengcheng, Zheng Haigang, Nie Songlin, Gao Shoufu, Du Xianjun, Liang Xunmei, Cui Zhanming, Feng Zhongchao, Shao Maogen, Lyu Jiansong, Yu Haigang, Zhang Gensheng, Xiao Guangting, Chen Ximing, Wang Dunsheng, Zhang Tao, Huang Jingying, Gao Yuqing, Cheng Wei.

The previous editions of this document and of the document it replaces are as follows:

- first published in 1998 as GB/T 17639-1998, first revised in 2008;

- this is the second revision.

1 Scope

This document specifies the product classification, specifications, code, technical requirements, test methods, inspection rules, packaging, storage and transportation, and marking of filament spunbond needlepunched nonwoven geotextiles.

This document is applicable to filament spunbond needlepunched nonwovens made from polyester or polypropylene as raw material by spinning, web laying and needlepunch consolidation.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using the strip method

GB/T 4666 Textiles - Woven fabrics - Determination of length and width

GB/T 13759 Geosynthetics - Terms and definitions

GB/T 13760 Geosynthetics - Sampling and preparation of test specimens

GB/T 13761.1 Geosynthetics - Determination of thickness at specified pressures - Part 1: Single layers

GB/T 13762 Geosynthetics - Test method for mass per unit area of geotextiles and geotextile-related products

GB/T 13763 Geosynthetics - Determination of tearing strength by the trapezoid method

GB/T 14799 Geotextiles and geotextile-related products - Determination of the characteristic opening size - Dry sieving method

GB/T 14800 Geosynthetics - Static puncture test (CBR test)

GB/T 15788 Geosynthetics - Wide-width tensile test

GB/T 15789 Geotextiles and geotextile-related products - Determination of water permeability characteristics normal to the plane, without load

GB/T 16422.2 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps

GB/T 16422.3 Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps

GB/T 16989 Geosynthetics - Wide-width tensile test of joints/seams

GB/T 17630 Geotextiles and geotextile-related products - Dynamic perforation test - Cone drop test

GB/T 17631 Geotextiles and geotextile-related products - Test method for resistance to oxidation

GB/T 17632 Geotextiles and geotextile-related products - Test method for resistance to acid and alkaline liquids

GB/T 17633 Geotextiles and geotextile-related products - Determination of water flow capacity in their plane

GB/T 17634 Geotextiles and geotextile-related products - Determination of characteristic opening size - Wet sieving method

GB/T 17635.1 Geotextiles and geotextile-related products - Determination of friction characteristics - Part 1: Direct shear test

GB/T 17636 Geotextiles and geotextile-related products - Determination of abrasion resistance - Sand paper/sliding block method

GB/T 17637 Geotextiles and geotextile-related products - Determination of tensile creep and creep rupture behaviour

GB/T 19978 Geotextiles and geotextile-related products - Determination of puncture strength

GB/T 24218.18 Textiles - Test methods for nonwovens - Part 18: Determination of breaking strength and elongation at break using the grab method

FZ/T 01153 Nonwovens - Description of defects - Vocabulary

3 Terms and definitions

For the purposes of this document, the terms and definitions given in GB/T 13759 and FZ/T 01153 apply.

4 Product classification, specifications and code

4.1 Product classification

Filament spunbond needlepunched nonwoven geotextiles are classified by fibre type into polyester and polypropylene.

4.2 Product specifications

The specification of filament spunbond needlepunched nonwoven geotextiles is expressed by nominal strength; width, mass per unit area and thickness are auxiliary specifications, designed according to the contract and actual needs.

The recommended series of specifications for polyester products is as follows: nominal strength (kN/m): 6, 9, 12, 18, 24, 30, 36, 48, 54, etc.

The recommended series of specifications for polypropylene products is as follows: nominal strength (kN/m): 6, 9, 12, 18, 24, 30, 42, 56, etc.

4.3 Product code

The code of filament spunbond needlepunched nonwoven geotextiles is expressed as (1)(2)-(3)-(4)-(5), where:

(1) fibre code: PET - polyester, PP - polypropylene;

(2) nominal strength (kN/m);

(3) nominal width (m);

(4) nominal mass per unit area (g/m2);

(5) nominal thickness (mm).

Note: nominal strength, nominal width, nominal mass per unit area and nominal thickness are respectively the tensile strength, width, mass per unit area and thickness declared by the manufacturer or supplier.

Example 1: a polyester filament spunbond needlepunched nonwoven geotextile with a nominal strength of 15 kN/m, nominal width of 4.5 m, nominal mass per unit area of 290 g/m2 and nominal thickness of 2.2 mm has the product code PET15-4.5-290-2.2.

Example 2: a polypropylene filament spunbond needlepunched nonwoven geotextile with a nominal strength of 15 kN/m, nominal width of 5 m, nominal mass per unit area of 200 g/m2 and nominal thickness of 2.0 mm has the product code PP15-5-200-2.0.

5 Technical requirements

5.1 Intrinsic quality

5.1.1 Intrinsic quality comprises basic items and optional items. The basic technical requirements for polyester filament spunbond needlepunched nonwoven geotextiles are given in Table 1, and those for polypropylene filament spunbond needlepunched nonwoven geotextiles in Table 2.

Table 1 - Basic technical requirements for polyester filament spunbond needlepunched nonwoven geotextiles (values for nominal strength 6 / 9 / 12 / 18 / 24 / 30 / 36 / 48 / 54 kN/m):

1 Longitudinal and transverse tensile strength, kN/m >= 6.0 / 9.0 / 12.0 / 18.0 / 24.0 / 30.0 / 36.0 / 48.0 / 54.0.

2 Longitudinal and transverse elongation at maximum load, %: 30 to 80.

3 CBR bursting strength, kN >= 0.9 / 1.6 / 1.9 / 2.9 / 3.9 / 5.3 / 6.4 / 7.9 / 8.5.

4 Longitudinal and transverse tearing strength, kN >= 0.15 / 0.22 / 0.29 / 0.43 / 0.57 / 0.71 / 0.83 / 1.10 / 1.25.

5 Equivalent opening size O90 (O95), mm: 0.05 to 0.30.

6 Vertical permeability coefficient, cm/s: K × (10^-1 to 10^-3), where K = 1.0 to 9.9.

7 Width deviation rate, % >= -0.5.

8 Mass per unit area deviation rate, % >= -5.

9 Thickness deviation rate, % >= -10.

10 Coefficient of variation of thickness (CV), % <= 10.

11 Dynamic perforation (a), hole diameter, mm <= 37.0 / 33.0 / 27.0 / 20.0 / 17.0 / 14.0 / 11.0 / 9.0 / 7.0.

12 Longitudinal and transverse breaking strength (grab method) (a), kN >= 0.3 / 0.5 / 0.7 / 1.1 / 1.4 / 1.9 / 2.4 / 3.0 / 3.5.

13 UV resistance (xenon arc lamp method) (a), longitudinal and transverse strength retention, % >= 70.

14 UV resistance (fluorescent UV lamp method) (a), longitudinal and transverse strength retention, % >= 80.

Note 1: where the nominal strength lies between adjacent specifications in the table, the corresponding assessed value is calculated by linear interpolation; outside the range of the table, the assessed values are agreed between supplier and purchaser.

Note 2: the interpolation formula is Y = Y1 + (Y2 - Y1) / (X2 - X1) × (X - X1), where X is the nominal strength and Y is the corresponding assessed value.

Note 3: breaking strength (grab method) is also commonly called grab strength.

(a) Whether this item is assessed is agreed between the trading parties; when assessed, the requirement in the table applies.

Table 2 - Basic technical requirements for polypropylene filament spunbond needlepunched nonwoven geotextiles (values for nominal strength 6 / 9 / 12 / 18 / 24 / 30 / 42 / 56 kN/m):

1 Longitudinal and transverse tensile strength, kN/m >= 6.0 / 9.0 / 12.0 / 18.0 / 24.0 / 30.0 / 42.0 / 56.0.

2 Longitudinal and transverse elongation at maximum load, %: 40 to 100.

3 CBR bursting strength, kN >= 1.0 / 1.6 / 2.1 / 3.2 / 4.2 / 5.5 / 6.5 / 8.7.

4 Longitudinal and transverse tearing strength, kN >= 0.25 / 0.38 / 0.50 / 0.70 / 0.85 / 1.00 / 1.20 / 1.50.

5 Equivalent opening size O90 (O95), mm: 0.05 to 0.30.

6 Vertical permeability coefficient, cm/s: K × (10^-1 to 10^-3), where K = 1.0 to 9.9.

7 Width deviation rate, % >= -0.5.

8 Mass per unit area deviation rate, % >= -5.

9 Thickness deviation rate, % >= -10.

10 Coefficient of variation of thickness (CV), % <= 10.

11 Dynamic perforation (a), hole diameter, mm <= 34.0 / 31.0 / 27.0 / 20.0 / 17.0 / 14.0 / 11.0 / 7.0.

12 Longitudinal and transverse breaking strength (grab method) (a), kN >= 0.4 / 0.7 / 1.0 / 1.5 / 2.0 / 2.5 / 3.0 / 4.0.

13 Acid and alkali resistance (a), longitudinal and transverse strength retention, % >= 90.

14 UV resistance (xenon arc lamp method) (a), longitudinal and transverse strength retention, % >= 70.

15 UV resistance (fluorescent UV lamp method) (a), longitudinal and transverse strength retention, % >= 80.

Note 1: where the actual specification (nominal strength) lies between adjacent specifications in the table, the corresponding assessed value is calculated by linear interpolation; outside the range of the table, the assessed values are agreed between supplier and purchaser.

Note 2: the interpolation formula is Y = Y1 + (Y2 - Y1) / (X2 - X1) × (X - X1), where X is the nominal strength and Y is the corresponding assessed value.

Note 3: breaking strength (grab method) is also commonly called grab strength.

(a) Whether this item is assessed is agreed between the trading parties; when assessed, the requirement in the table applies.

5.1.2 Optional items include puncture strength, longitudinal/transverse strength ratio, in-plane water flow capacity, wet-sieving opening size, friction coefficient, abrasion resistance, creep properties, elongation at specified load, load at specified elongation, oxidation resistance, joint/seam strength, etc. The standard values of optional items are specified in the supply contract.

5.2 Appearance quality

Appearance defects are divided into minor defects and major defects (see Table 3). No major defects shall be present on any product, and there shall be no more than 5 minor defects per 200 m2.

Table 3 - Assessment of appearance defects (defect: minor defect; major defect; remarks):

1 Broken needle residue: not permitted.

2 Uneven fabric surface, creases: not obvious; obvious.

3 Foreign matter: soft, thickness <= 5 mm; hard, or soft with thickness > 5 mm.

4 Poor edges: <= 300 cm, counted as one defect per 50 cm; > 300 cm.

5 Damage: <= 0.5 cm; > 0.5 cm, or holes; measured by maximum length.

6 Others: assessed by reference to similar defects.

6 Test methods

6.1 Longitudinal and transverse tensile strength and longitudinal and transverse elongation at maximum load shall be determined in accordance with GB/T 15788.

6.2 CBR bursting strength shall be determined in accordance with GB/T 14800.

6.3 Longitudinal and transverse tearing strength shall be determined in accordance with GB/T 13763.

6.4 Equivalent opening size shall be determined in accordance with GB/T 14799.

6.5 Vertical permeability coefficient shall be determined in accordance with GB/T 15789.

6.6 Width shall be determined in accordance with GB/T 4666. The width deviation rate is calculated using formula (1), with the result rounded to one decimal place.

C = (w1 - w0) / w0 × 100 (1)

where:

C - width deviation rate, %;

w1 - measured width, in metres (m);

w0 - nominal width, in metres (m).

6.7 Mass per unit area shall be determined in accordance with GB/T 13762. The mass per unit area deviation rate is calculated using formula (2), with the result rounded to one decimal place.

G = (m1 - m0) / m0 × 100 (2)

where:

G - mass per unit area deviation rate, %;

m1 - measured mass per unit area, in grams per square metre (g/m2);

m0 - nominal mass per unit area, in grams per square metre (g/m2).

6.8 Thickness shall be determined in accordance with GB/T 13761.1 at a pressure of 2 kPa. The thickness deviation rate is calculated using formula (3), with the result rounded to one decimal place.

P = (d1 - d0) / d0 × 100 (3)

where:

P - thickness deviation rate, %;

d1 - measured thickness, in millimetres (mm);

d0 - nominal thickness, in millimetres (mm).

6.9 The coefficient of variation of thickness (CV) shall be determined in accordance with GB/T 13761.1.

6.10 Dynamic perforation shall be determined in accordance with GB/T 17630.

6.11 Longitudinal and transverse breaking strength (grab method) shall be determined in accordance with GB/T 24218.18, with clamp jaw faces of 25 mm × 50 mm.

6.12 Acid and alkali resistance shall be determined in accordance with GB/T 17632, and the strength retention after acid and alkali treatment calculated.

6.13 UV resistance (xenon arc lamp method) shall be determined in accordance with GB/T 16422.2, with an irradiance of (0.51 ± 0.02) W/(m2·nm) at the 340 nm control point, a 2 h cycle consisting of 102 min dry and 18 min water spray, a black standard (panel) temperature of (65 ± 3) °C and a relative humidity of (50 ± 10) %. After 500 h of ageing, the breaking strength before and after ageing is measured in accordance with GB/T 3923.1, and the longitudinal and transverse strength retention is calculated using formula (4), with the result rounded to one decimal place.

R = F1 / F0 × 100 (4)

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 10 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

Similar standards

GB 18383-2025|GB/T 17640-2023|GB/T 18887-2023|GB/T 19979.2-2006|GB 21550-2008

Editions of GB/T 17639

Edition	Title	Revision	Status
GB/T 17639-2023	Geosynthetics - Synthetic filament spunbond and needlepunched nonwoven geotextiles	current edition	Current
GB/T 17639-2008	Geosynthetics - Synthetic filament spunbond and needlepunched nonwoven geotextiles	previous edition	Superseded

This page sells the current edition, GB/T 17639-2023. Earlier editions are listed for reference only.

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