Safety requirements for flame retardant test in British BS5852

The furniture fire safety test and the national furniture fire safety regulations of BS5852 require that all domestic upholstered household furniture and other upholstered products imported into China must meet the specified combustion performance requirements. This regulation applies to:

• Bedding • Carpet and filler block polyurethane foam must pass the Schedule1Part I block polyurethane foam flammability test.

The flammability test of bulk foam must be conducted first, and then the flammability test of Schedule1Part II chip foam must be conducted.

• Furniture for private purposes, such as sofas, beds, children's furniture, cushions, high chairs, mattresses (any size) and pillows, for indoor and other living quarters (including caravans)

• Outdoor furniture for private use (such as outdoor furniture such as gardens/yards), but it also applies to indoor and other residential areas (including caravans) This regulation does not apply to:

Latex rubber foam must pass the Schedule1Part Ⅲ Latex rubber foam flammability test. When a variety of non foam fillers exist, one method is to conduct a separate test for each filler, Schedule2Part I single non foam filler flammability test, and the other method is to conduct a combined flammability test for Schedule2Part II multiple fillers. If foam filler exists in various fillers, foam filler shall be tested separately. Coverings Generally, visible covers and invisible covers must pass Schedule5Part I and Schedule5Part II simulation match tests respectively. If the following fiber components in the fabric exceed 75%, and are not subject to PU coating finishing and pretreatment, and the sandwich material has passed the Schedule3 sandwich flammability test, the covering fabric may not pass the simulated match test. (cotton fiber, modal fiber, flax fiber, silk, viscose fiber, wool).

Invisible covers refer to the covering materials used in the invisible areas of furniture (backrests usually used against walls, armrests and cushion bottoms that cannot be used reversely, dust-proof cloth and other interlayers). In order to protect the furniture and its fillings, a sandwich material passing Schedule3 must be added between the covering and the fillings that have not passed the flammability test. After the fillers and covers of household indoor furniture (except mattresses, bed bases, pillows and cushions) pass the corresponding flammability test, their compositions must also pass the combination test of Schedule4Part I visible covers or Schedule4Part II invisible covers.

Pillows and cushions

Schedule1Part I adopts BS5852Part2 fire source 5 test method for flammability test of block polyurethane foam, and 100% polyester standard cloth with flame retardant treatment is used for covering.

The pillow and cushion can be tested by Schedule2Part I for single non foam filler flammability test or Schedule2Part III for pillow and cushion combination test. In addition, the decorative outer fabrics of pillows and cushions do not need to be tested separately.

Evaluation criteria: (1) Smoke, flash and other smoldering phenomena are still found from the outside 60 minutes after ignition; (2) Open fire is still found 10 minutes after ignition; (3) During the test, smoldering or open fire phenomenon has a continuous growth trend; (4) After the flame and smoldering stop completely, the test sample is almost consumed completely; (5) After the flame and smoldering stop completely, the test sample is burnt through or to any edge, and the weight loss exceeds 60g. If the above phenomenon occurs, the polyurethane foam cannot pass the flammability test, otherwise it will pass. Schedule1Part II aims at the flammability test of crumb foam:

Chip foam must first pass the flammability test of block foam.

The test method of fire source 2 in BS5852PART2 is used for the chip foam test, and the 100% polyester standard cloth with flame retardant treatment is used for the covering.

Evaluation criteria: (1) Smoking, flashing and other smoldering phenomena can still be found from the outside 10 minutes after the ignition source is removed; (2) Open fire is still found 2 minutes after the fire source is removed; (3) During the test, smoldering or open fire phenomenon has a continuous growth trend; (4) After the flame and smoldering stop completely, the test sample is almost consumed completely.

If the above phenomenon occurs, the crumb foam cannot pass the flammability test, otherwise it will pass. After the flame and smoldering are completely stopped, the test sample is burned through or to any edge, so it can be considered that the chip foam has passed the flammability test.

Schedule1Part Ⅲ is for latex rubber foam flammability test

BS5852PART2 fire source 2 test method is used for latex rubber foam test, and 100% polyester standard cloth with flame retardant treatment is used for covering.

Evaluation criteria: (1) Smoking, flashing and other smoldering phenomena can still be found from the outside 10 minutes after the ignition source is removed; (2) Open fire is still found 2 minutes after the fire source is removed; (3) During the test, smoldering or open fire phenomenon has a continuous growth trend; (4) After the flame and smoldering stop completely, the test sample is almost consumed completely. (5) After the flame and smoldering stop completely, the test sample is burnt through or to any edge.

If the above phenomenon occurs, the latex rubber foam cannot pass the flammability test, otherwise it will pass.

Schedule2Part I is aimed at the flammability test of single non foam filler.

BS5852PART2 fire source 2 test method is used for single non foam filler test, and 100% polyester standard cloth with flame retardant treatment is used for covering. The evaluation standard is the same as Schedule1Part II for the flammability test of crumb foam. The combined flammability test of Schedule2Part II for a variety of fillers (except for the fillers of furniture other than mattresses, bed bases, cushions and pillows) The combination test of a variety of fillers adopts the BS5852PART2 ignition source 2 test method, and the covering adopts 100% polyester standard cloth with flame retardant treatment.

The evaluation standard is the same as Schedule1Part Ⅲ for latex rubber foam flammability test.

Schedule2Part Ⅲ refers to the pillow and cushion combination test. The pillow combination test adopts the BS5852ART2 fire source 2 test method. The test sample is composed of filler and original covering fabric, and does not need 100% polyester standard cloth after flame retardant finishing. The seat cushion combination test adopts the BS5852PART2 ignition source test method. The test sample is composed of filler, original covering fabric and 100% polyester standard fabric after flame retardant finishing. The evaluation standard is the same as Schedule1Part II for the flammability test of crumb foam.

Schedule3 for sandwich flammability test

The sandwich fabric after flame retardant finishing must be soaked in 40 ℃ water for 30 minutes (according to BS56514.2-4.5). The flammability test of interlayer adopts the test method of BS5852PART2 ignition source 5. The test sample is composed of 100% polyester standard cloth after flame retardant finishing, interlayer to be tested and standard non flame retardant polyurethane foam conforming to BS3379B.

Evaluation criteria: (1) Smoke, flash and other smoldering phenomena can still be found from the outside 60 minutes after ignition; (2) Open fire is still found 10 minutes after ignition; (3) During the test, smoldering or open fire phenomenon has a continuous growth trend; (4) After the flame and smoldering stop completely, the test sample is almost consumed completely; (5) After the flame and smoldering stop completely, the test sample is burnt through or to any edge. If the above phenomenon occurs, the interlayer cannot pass the flammability test, otherwise, it will pass.

Schedule4Part I Combination Test of Visible Coverings

Except for mattresses, bed bases, cushions and pillows, household indoor furniture must pass the combination test. The cover after flame retardant finishing must be soaked in 40 ℃ water for 30 minutes (according to BS56514.2-4.5). It can be seen that the test method of BS5852PART1 fire source is adopted for the combination test of covering materials, and the filler is non flame retardant polyurethane foam conforming to the standard of BS3379B.

Evaluation criteria: open fire, smoke, flash and other smoldering phenomena occur at any time within 1 hour of placing.

If the above phenomena occur, the visible covering cannot pass the flammability test, otherwise it will pass.

Schedule4Part II Combination Test of Invisible Coverings

Invisible coverings need not be soaked whether or not they have been flame retardant treated. The test method of BS5852PART1 fire source is adopted for the combination test of invisible covers, and the filler is foam with density of 24-26kg/m3 that passes the Schedule1Part I block polyurethane foam flammability test. The evaluation standard is the same as the test of Schedule4Part I visible covering.

Schedule5Part I Simulated Match Test of Visible Covering

The cover after flame retardant finishing must be soaked in water at 40 ℃ for 30 minutes (according to BS56514.2-4.5). The butane ignition source test method of BS5852PART1 simulation match is used for the visible cover simulation match test. The filler is non flame retardant polyurethane foam conforming to BS3379B standard.

Evaluation criteria: After removing the ignition source for 2 minutes, there is still open fire or smoldering phenomena such as smoke and flash. If the above phenomenon occurs, the visible covering cannot pass the flammability test, otherwise it will pass

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Invisible coverings need not be soaked whether or not they have been flame retardant treated. The combination test of invisible covers adopts the butane ignition source test method of BS5852PART1 simulation match, and the filler adopts the foam with density of 24-26kg/m3 that passes the Schedule1Part I bulk polyurethane foam flammability test. The evaluation standard is the same as the simulation match test of Schedule5Part I visible covering.