GB 20653-2020Protective clothing--High visibility warning clothing for professional use (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard replaces GB 20653-2006 "High visibility warning clothing for professional use". Compared with GB 20653-2006, the main changes in this Standard are as follows.

- Change the standard's name from "High visibility warning clothing for professional use" to "Protective clothing - High visibility warning clothing for professional use";

- Add and modify some terms and definitions;

- Add requirements for area measurement and grade assessment of warning clothing;

- Modify the design requirements for warning clothing;

- Modify the ergonomic requirements for warning clothing;

- Modify the technical requirements for color fastness to perspiration of background materials and non-fluorescent materials;

- Modify the technical requirements for the color fastness of background materials and non-fluorescent materials to water washing, dry cleaning, hypochlorite bleaching and heat pressing;

- Modify the technical requirements for dimensional changes in background materials and non-fluorescent materials. Add test method for dimensional changes;

- Modify the technical requirements for the mechanical properties of background materials and non-fluorescent materials;

- Add the chemical safety performance requirements and test methods for background materials and non-fluorescent materials;

- Modify the reflective performance requirements for single-performance retroreflective materials. Delete 3 ratings. Unify technical requirements;

- Modify the test methods for water washing and dry cleaning;

- Modify the graphical symbol for high visibility warning clothing. Delete the retroreflective material level identifier in the original graphic symbol;

- Add normative Annex D "Arrangement of reflective tapes during industrial washing";

- Add informative Annex F "Environmental risk level and visibility clothing design guidance" to provide reference information to guide the application and design of high visibility warning clothing.

This Standard uses redrafting method to modify and adopt ISO 20471:2013 "High visibility clothing - Test methods and requirements". The main differences between this Standard and ISO 20471:2013 are as follows.

- Modify the standard's name;

- Delete the "Introduction" of ISO 20471:2013;

- Regarding the normative reference documents, this Standard has been adjusted with technical differences to adapt to the technical conditions in China. The adjustments are reflected in Chapter 2 "Normative references". The specific adjustments are as follows.

- Replace ISO 105-A02 and ISO 105-A03:1993 respectively with GB/T 250 and GB/T 251, which are equivalent to ISO 105-A02 and ISO 105-A03:1993 (see 5.3);

- Add references to GB/T 1335.1 (see 4.3), GB/T 1335.2 (see 4.3), GB 5296.4 (see 8.3), GB/T 12704.1 (see 5.6) and GB 18401-2010 (see 5.7);

- Replace ISO 105-X12 with GB/T 3920, which modified ISO 105-X12 (see 5.3);

- Replace ISO 105-E04 with GB/T 3922, which is modified ISO 105-E04 (see 5.3);

- Replace ISO 13934-1 with GB/T 3923.1, which modified ISO 13934-1 (see 5.5.1);

- Replace CIE 15 and CIE S 005 with GB/T 3978, which non-equivalently adopted CIE 15 and CIE S 005 (see 7.2);

- Replace CIE 15 with GB/T 3979, which non-equivalently adopted CIE 15 (see 7.2);

- Replace ISO 105-D01 with GB/T 5711, which modified ISO 105-D01 (see 5.3.3);

- Replace ISO 105-X11 with GB/T 6152, which equivalently adopted ISO 105-X11 (see 5.3.3);

- Replace ISO 105-N01 with GB/T 7069, which equivalently adopted ISO 105-N01 (see 5.3.3);

- Replace ISO 13938-1 with GB/T 7742.1, which modified ISO 13938-1 (see 5.5.2);

- Replace ISO 105-B02 with GB/T 8427-2008, which modified ISO 105-B02 (see 5.2.2);

- Replace ISO 3759 with GB/T 8628-2013, which modified ISO 3759 (see 7.3);

- Replace ISO 6330:2012 with GB/T 8629-2017, which modified ISO 6330:2012 (see 7.3 and 7.5.5.3);

- Replace ISO 3758:2005 with GB/T 8685, which modified ISO 3758:2005 (see 8.2);

- Replace ISO 105-C06:2010 with GB/T 12490-2014, which modified ISO 105-C06:2010 (see 5.3.3);

- Replace ISO 4675 with GB/T 18426, which equivalently adopted ISO 4675 (see 7.5.3);

- Replace ISO 3175-2 with GB/T 19981.2, which modified ISO 3175-2 (see 7.3 and 7.5.5.3);

- Replace ISO 12947-2 with GB/T 21196.2, which modified ISO 12947-2 (see 7.5.1);

- Replace ISO 4674-1:2003 with HG/T 2581.1-2009, which modified ISO 4674-1:2003 (see 5.5.3);

- In terms and definitions, add "retro reflection" and "non-fluorescent material"; delete "torso", "long sleeve (1/1 arm)", "road", "active road user", "passive road user", "outer shell";

- Modify the design requirements and typical design styles of warning clothing.

Adjust the minimum width of reflective tape for level 1 warning clothing from 50 mm to 25 mm. Add the requirements for the design of shoulder reflective tape;

- Add 4.4 "Ergonomic requirements for warning clothing";

- Modify 5.6 "Physiological performance - Water vapour and thermal resistance" of ISO 20471:2013 to "Moisture permeability";

- Add 5.7 "Chemical safety performance requirements";

- ISO 20471:2013 has a total of 9 chapters, and this Standard has a total of 8 chapters.

Chapter 8 and 9 in ISO 20471:2013 are modified and merged as Chapter 8 of this Standard "Marks, maintenance labels and instructions for use";

- Compared with the 4 annexes of ISO 20471:2013 (Annex A ~ Annex D), this Standard has been increased to 6 annexes (Annex A ~ Annex F);

- Modified the design legend of warning clothing in Chapter 4 of ISO 20471:2013 as informative Annex A "Typical design style of warning clothing";

- Add informative Annex B "Chromaticity diagram of background material and combined-performance material";

- Add normative Annex C "Method for determination of retro reflection coefficient";

- Adjust Annex B of ISO 20471:2013 as the normative Annex D of this Standard "Arrangement of reflective tapes during industrial washing";

- Adjust Annex C of ISO 20471:2013 as normative Annex E of this Standard "Method for determination of reflective performance in rainy conditions";

- Modify and integrate the relevant content in the "Introduction", Annex A and Annex D of ISO 20471:2013 as the informative Annex F of this Standard "Environmental risk level and visibility clothing design guidance". Add site examples in Table F.1.

1 Scope

This Standard specifies the design requirements, material performance requirements, reflective performance requirements, test methods, marks, maintenance labels and instructions for use of high visibility warning clothing for occupational use.

2 Normative references

The following referenced documents are indispensable for the application 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 250, Textiles -- Tests for colour fastness -- Grey scale for assessing change in colour (GB/T 250-2008, ISO 105-A02:1993, IDT)

3 Terms and definitions

For the purposes of this document, the terms and definitions defined in GB/T 3978 as well as the followings apply.

Colored fluorescent materials used to enhance visibility in the environment but do not meet the requirements for retroreflective materials in this Standard.

4 Level and design requirements

To ensure 360° visibility, all sides of the clothing shall be designed with visible materials. Horizontal reflective tape and fluorescent material shall surround the torso, pant legs and sleeves. The area of visible materials configured on the front and back of clothing shall not be less than 40% of the minimum usage area of visible materials for corresponding level warning clothing.

5 Performance requirements for background materials, non-fluorescent materials and combined-performance materials

Carry out the test according to 7.5.5. The chromaticity coordinates and brightness factor of the background material shall comply with the requirements of Table 2.

6 Reflective performance requirements for retroreflective materials and combined-performance materials

Samples tested according to the provisions of 6.1 shall undergo corresponding physical tests in accordance with the provisions of Table 6. After the test, the specimen shall meet the optical performance requirements in 6.2.2, 6.2.3 and 6.2.4.

7 Test methods

The specimen shall be humidified for at least 24 h at a temperature of (20±2)°C and a relative humidity of (65±4)%. If the test needs to be conducted under other conditions, the test shall be conducted within 5 min after the specimen is removed from the humidity-controlled environment.

8 Marks, maintenance labels and instructions for use

The maximum number of times garment can be washed shall be the number corresponding to the material with the lowest washability among the visible materials (background material, retroreflective material and combined-performance material) of the garment.

It shall include content such as "The maximum number of washable times is not the only factor that affects the service life of clothing. […]