Test Method for Evaluating Mattresses for Combustion Resistance by the Cigarette

3 Definitions

3.1 "Mattress" means any product intended, promoted or normally used for the purpose of being slept on that contain resilient material enclosed in a ticking, whether or not such products are referred to as mattresses, excluding: mattress pads; sleeping bags; box springs or other mattress foundations and supports; parts of upholstered furniture that may be used for the purpose of being slept on that are not separate mattresses; infant product pads and crib mattresses; and one-of-a-kind prescription mattresses. Futons are considered to be mattresses and are covered by these requirements.

3.2 "Ticking" means the outermost layer of fabric or related material that encloses the upholstery and the core.

3.3 "Core" means the main support system such as springs, foam or fluid, that may be present in a mattress.

3.4 "Upholstery" means all material, either loose or attached, within the ticking, or between the ticking and the core.

4 Apparatus

4.1 See CGSB CAN2-4.2 Method No. 27.7-M77: Combustion Resistance of Mattresses - Cigarette Test, section 4 (Appendix 1) except section 4.3 which is replaced by section 6.2 below.

5 Procedure

5.1 Test according to the procedures set out in CGSB CAN2-4.2 Method No. 27.7-M77: Combustion Resistance of Mattresses - Cigarette Test, sections 5, 6 and 7 (Appendix 1)

6 Quality Assurance/Quality Control Procedures

6.1 The firmness tester should be calibrated in accordance with the manufacturer's recommended procedures.

6.2 The specifications of the cigarettes should be checked as follows:

6.2.1 The cigarette shall be without filter tip and made from natural tobacco, 85 ± 2 mm long with a tobacco packing density of 270 ± 20 kg/m³ and a total mass of 1.1 ± 0.1 g at 65 ± 2% RH and 20°± 2°C. The cigarette, when conditioned at 21 ± 3°C and 35-50% RH and ignited at one end, shall burn its entire length in 1500 ± 100 s when placed horizontally on the surface of a piece of bonded glass fibre fabric (480g/m² ± 5%). ^{1 2}

6.3 The specifications of the polyurethane foam should be checked as per CGSB CAN2-4.2 Method No. 27.7-M77: Combustion Resistance of Mattresses - Cigarette Test, section 4.6 (Appendix 1)

6.4 Testing must be performed in a draft free area (see F-00)

6.5 Conditioning of the test specimens and the cigarettes is to be done at a temperature of 21±3°C and a relative humidity of 35-50%.

6.6 The Quality Control section of this method is under development and, when completed, will be added in a revised issue of this method.

7 Test Report

7.1 The test report shall contain the following information:

7.1.1 Whether the charring or melting extended more than 50 mm in any horizontal direction from the original location of the cigarette.

7.1.2 Whether any combustion continued in the mattress assembly 10 minutes after the cigarette had completely extinguished.

7.1.3 The firmness tester reading.

7.1.4 Whether compression was used to obtain the required firmness.

7.1.5 Whether standard foam was added to obtain the required firmness.

7.1.6 Composition of the mattress described as a cross-section.

7.2 The report may be prepared in the format illustrated below:

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Composition of the mattress described as a cross-section

Specimen	Surface charring or melting extended beyond 50 mm	Continued combustion 10 minutes after the cigarette has completely extinguished
1	No	No
2	No	Yes
3	Yes	n/a
4	No	No
5	No	No
6	No	No
7	Yes	n/a
8	No	No
9	No	Yes
10	No	No

Compression Used: Yes
Standard Foam added: Yes
Firmness Tester Reading: 75

Construction:

ticking
2" batting
1" foam
2" synthetic batting
1" foam
2" batting
ticking

or

Ticking quilted to 4 mm foam and scrim
13 mm foam
5 mm pressed fibre pad

Label:

CA12345
Content - white cotton felt, polyurethane foam, polyester
Outer covering - polyester 60%, cotton 40%

or

Scan in the label

8 Precision and Bias

8.1 Precision: This section of the method is under development and will be added in a revised issue when completed

8.2 Bias: The true value of the combustion resistance of mattresses can only be described in the terms of a test method. Within this limitation, this test method has no known bias.

9 Sampling

9.1 Sufficient sample that will provide 10 specimens, each with an area of 300 mm x300 mm and a depth of 50 mm.

9.2 For spring core type mattresses where the construction on both sides of the core is the same, all layers from one side of a twin size mattress should be sufficient. If the two sides are not the same (i.e different ticking, different quilting style) then both sides must be tested.

9.3 For futons, one twin size should be sufficient if the thickness is greater than 100 mm.

Appendix 1

CAN2-4.2-M77, Method 27.7 - 1979
Notes

A.1 The firmness tester described in section 4.2, Note 1 and Note 4 is now referred to as Model 302SL. There is no Canadian source for this instrument.

A.2 The polyurethane foam described in section 4.6 and Note 3 is available from Domfoam International Inc., 8785 Boul. Langelier, St-Léonard, Montréal, Québec H1P 2C9 (514- 325-6477)

A.3 The bonded glass fibre fabric with a fabric mass of 55 g/m² described in section 4.3 does not exist. The Product Safety Laboratory uses a bonded glass fibre fabric with a fabric mass of 480 g/m² (±5%).

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¹The following Canadian cigarette conforms to these specifications: Mark Ten King Size
²The 55 g/mm² bonded glass fabric referenced in the standard does not exist.