Canada Updates Flammability Standards for Textiles

TESTCOO/May 5, 2023
Canada Updates Flammability Standards for Textiles

The Canadian General Standards Board recently issued a revised standard for flammability of textiles – CAN/CGSB-4.2 No.27.5-2023, Textile test methods – Flame resistance – 45° angle test – One second flame impingement.

For textile products under the Textile Flammability Regulations SOR/2016-194, as well as the tight-fitted children’s sleepwear under the Children’s sleepwear Regulations SOR/2016-169, the flame spread time must be determined according to the test method CAN/CGSB-4.2 No. 27.5, which gets amended from time to time

This standard determines the flame spread properties of a textile product when a specimen is supported at an angle of 45°, and a flame is applied to its surface for 1 second. It also describes the dry cleaning and laundering procedures for removing non-permanent flame-retardant treatments applied to textile products.

Guideline changes are as follows:

  1. Added definitions for “base burn”, “charred / charring” and “melting’:

    -Base burn – the base of a specimen having a raised fiber surface is ignited, charred, melted or fused to a point where the damage is apparent from the underside of the specimen.

    -Charring – formation of carbonaceous residue during pyrolysis or incomplete combustion.

    -Melting – phenomena accompanying the softening of a material under the influence of heat (including shrinking, dripping, and burning of molten material, etc.).

  2. Incorporated dry cleaning requirements from CAN/CGSB-4.2 No. 30.3-1994

  3. Added informative Annex B outlining burning codes to describe results:

    -Did Not Ignite (DNI)

    -Ignited But Extinguished (IBE)

    -Surface Burn (SB)

    -Surface Burn, Base Burn (SBBB)

    -Surface Flash (SF)

    -Surface Flash, Base Burn (SFBB)

    -Timed Surface Flash (TSF)

    -Timed Surface Flash, Base Burn (TSFBB)

  4. Added informative Annex C to describe testing steps related to presence of flame retardants

  5. Updated figures

  6. Updated washing and drying parameters, cooling times and criteria for testing additional specimens

Textile products manufactured, imported, advertised or sold in Canada are subject to the CCPSA and must meet the flammability requirements set out in the Textile Flammability Regulations.

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