ISO 16840-10:2021 Wheelchair seating —Part 10: Resistance to ignition of postural support devices — Requirements and test method

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Wheelchair seating —Part 10: Resistance to ignition of postural support devices — Requirements and test method是于2021‑06‑08发布的ISO标准，适用于全球范围。

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INTERNATIONAL STANDARD ISO 16840-10:2021

Wheelchair seating —

Part 10: Resistance to ignition of postural support devices — Requirements and test method

1 Scope

This document specifies requirements and test methods to assess the resistance to ignition by smouldering cigarette equivalent of integrated or non‑ integrated components of a wheelchair intended to protect tissue integrity and/or provide postural support. The electronic ignition source is also a simulation of other potential sources of environmental ignition hazards.

The tests measure only the resistance to ignition of the items tested, and not the ignitability of the complete wheelchair. It gives an indication, but cannot guarantee, the ignition behaviour of the assembled devices of a complete wheelchair.

This document does not apply to resistance to ignition of structural parts of a wheelchair. This document does not cover changes in resistance to ignition as a result of regular washing or use of the postural support devices.

This document does not apply to the control of risks created by electrical and electronic components. This document allows for the separate testing of components of a wheelchair that are normally used in the horizontal plane (e.g. a seat cushion) from those normally used in the vertical plane (e.g. a back support).

This document describes testing an assembly of the composite of materials as used in the component. The results of the tests in this document do not give any indication of the resistance to ignition of any of the separate individual materials of the test sample.

NOTE The intent of this document is primarily to address components that interface with the human body, such as cushions for positioning, or whose described purpose is that of protecting skin tissue against pressure, shear, and maceration related damage, as well as textile, foam, and plastic‑ based postural support devices.

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.

ISO 554, Standard atmospheres for conditioning and/or testing — Specifications

ISO 71761‑ 5 , Wheelchairs — Part 15: Requirements for information disclosure, documentation and labelling

ISO 71762‑ 6:2007 , Wheelchairs — Part 26: Vocabulary

ISO 81911‑ :1987, Furniture  —  Assessment  of  the  ignitability  of  upholstered  furniture  —  Part  1:  Ignition 

source: smouldering cigarette

ISO 14971, Medical devices — Application of risk management to medical devices

ISO 16840-10:2021

3 Terms a nd definiti ons

For the purposes of this document, the terms and definitions given in ISO 7176‑26 and ISO 81911‑ :1987 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp

— IEC Electropedia: available at http://www.electropedia.org/

3.1

f l a m i n g

undergoing combustion in the gaseous phase with the emission of light

[SOURCE: ISO 8191–1:1987, 3.2]

3.2

non-integrated

detachable without the use of tools

Note 1 to entry: Seat or back support cushions held in place by hook and loop fastenings are also considered non‑ integrated.

3.3

postural support device

PSD

structure, attached to a wheelchair, that has a surface that contacts the occupant’s body and is used either to modify or to accommodate the occupant’s sitting posture

EXAMPLE seat, back support, lateral support, head support, pelvic positioning belt, anterior trunk support

[SOURCE: ISO 7176‑ 26:2007, 4.7.3]

3.4

progressive smouldering

exothermic oxidation, not accompanied by flaming (3.1), that is self‑ propagating, i.e. independent of the ignition source

Note 1 to entry: It might or might not be accompanied by incandescence.

[SOURCE: ISO 8191–1:1987, 3.1]

4 Principle

Test materials used in integrated and non‑ integrated seat and back support, and other postural support devices as used in wheelchairs are assembled in either horizontal or vertical samples and subjected to a heat source that is equivalent to a smouldering cigarette. The resulting effects on the test materials are observed and measured.

NOTE The tests are repeated one time to ensure that they are repeatable, but without incurring the costs of more tests than needed as a minimum

The pass criteria within this document have been set at a basic minimal level and are less severe than current requirements in some countries. Where practical, manufacturers shall use materials with superior resistance to ignition, when the overall risk analysis indicates the benefits outweigh any unintended harm, in accordance with ISO 14971.

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