GB/T 24218.17-2017Textiles -- Test methods for nonwovens -- Part 17: Determination of resistance to penetration by water (spray impact) (English PDF)

Foreword

GB/T 24218 Textiles – Test Methods for Nonwovens can be divided into the following

parts.

--- Part 1. Determination of Mass Per Unit Area;

--- Part 2. Determination of Thickness;

--- Part 3. Determination of Tensile Strength and Elongation (Strip Method);

--- Part 5. Determination of Resistance to Mechanical Penetration (Ball Burst

Method);

--- Part 6. Determination of Absorption;

--- Part 8. Determination of Liquid Strike-Through Time (Simulated Urine);

--- Part 10. Lint and Other Particles Generation in the Dry State;

--- Part 11. Run-off;

--- Part 12. Demand Absorbency;

--- Part 13. Repeated Liquid Strike-Through Time;

--- Part 14. Coverstock Wetback;

--- Part 15. Determination of the Air Permeability;

--- Part 16. Determination of Resistance to Penetration by Water (Hydrostatic

Pressure);

--- Part 17. Determination of Resistance to Penetration by Water (Spray Impact);

--- Part 18. Determination of Breaking Force and Elongation at Break (Grab Method);

--- Part 101. Saline Repellency (Mason Jar Method).

This Part belongs to Part 17 of GB/T 24218.

This Part was drafted as per the rules specified in GB/T 1.1-2009.

This Part adopts re-drafting method to modify and use ISO 9073-17.2008 Textiles –

Test Methods for Nonwovens – Part 17. Determination of Resistance to Penetration by

Water (Spray Impact).

The major technical differences and causes between this Part and ISO 9073-17. 2008

are as follows.

--- For the normative references, this Part adjusts the technical differences, so that

adapt to China's technical conditions; the adjusting situations mainly reflect in

the Clause 2 "Normative References"; the specific adjustment are as follows.

lambda Replace ISO 139 by GB/T 6529 which modifies and adopts the international

standards (see 7.2);

lambda Replace ISO 9073-6 by GB/T 24218.6 which modifies and adopts the

international standards (see 5.1);

lambda Add the quotation of GB/T 6682 (see 5.2);

lambda Delete the quotation of ISO 3951.5.

--- Water specified in 5.2 of this Part shall be "Level-III water" to facilitate to unify

the test conditions.

--- The diameter of nozzle hole of (0.990±0.005) mm is added to the Figure 1 of this

Part; so that unify the important parameter of tester, and ensure that the test

conditions are consistent.

--- The dimension of funnel is added to Figure 2 of this Part; so that unify the

important parameter of tester, and ensure that the test conditions are consistent.

--- Replace 7.1 of this Part "Sampling as per the product standard provision or

agreement of relative parties" by "Sampling as per ISO 3951.5", which may

conform to our test procedures more.

--- Add the provisions on specimen quantity to 7.3 of this Part; so that improve the

representativeness and consistency of the test results.

This Part does the following editorial modifications.

--- Modify the terminology in 3.1 of ISO 9073-17. 2008 into "resistance to penetration

by water of nonwoven materials";

--- Delete Item e) in 5.1 of ISO 9073-17. 2008; and simplify the Footnote 2) of ISO

9073-17. 2008 into the NOTE in 5.1 of this Standard;

--- Add the NOTE to Clause 8 of this Part "if necessary, report the coefficient of

variation".

This Part was proposed by China National Textile and Apparel Council.

This Part shall be under the jurisdiction of National Technical Committee for

Standardization of Textiles (SAC/TC 209).

Textiles – Test Methods for Nonwovens

– Part 17. Determination of Resistance

to Penetration by Water (Spray Impact)

1 Scope

This Part of GB/T 24218 specifies the test method adopting the spray impact method

to determine the resistance to penetration by water of nonwovens.

This Part is applicable to the nonwovens that are expected to have certain degree of

water resistance or water repellency.

The test results are related to the water repellency of the fiber raw materials of the

nonwovens and the structure & arrangement mode of the nonwovens.

2 Normative References

The following documents are essential to the application of this document. For the

dated documents, only the versions with the dates indicated are applicable to this

document; for the undated documents, only the latest version (including all the

amendments) are applicable to this document.

GB/T 6529 Textiles – Standard Atmospheres for Conditioning and Testing (GB/T

6529-2008, ISO 139. 2005, MOD)

GB/T 6682 Water for Analytical Laboratory Use – Specification and Test Methods

(GB/T 6682-2008, ISO 3696.1987, MOD)

GB/T 24218.6 Textiles – Test Methods for Nonwovens – Part 6. Absorption (GB/T

24218.6-2010, ISO 9073-6. 2000, MOD)

3 Terms and Definitions

The following terms and definitions are applicable to this document.

8 – Water droplet collector;

9 – Test stand;

10 – Spring clip with port length of 150mm;

11 – Specimen table putting specimen and absorbent paper;

12 – Baffle.

Figure 2 -- Impact Penetrating Tester Schematic Diagram

7 Procedures