JT/T 1095-2022 English PDF (JTT1095-2022)

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JT/T 1095-2022: Flame resistance of commercial bus interior materials
JT/T 1095-2022
JT
TRANSPORTATION INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 09
Replacing JT/T 1095-2016
Flame resistance of commercial bus interior materials
ISSUED ON: JANUARY 13, 2022
IMPLEMENTED ON: APRIL 13, 2022
Issued by: Ministry of Transport of PRC
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Technical requirements ... 7
5 Test method ... 10
6 Transition period requirements for implementation ... 11
Appendix A (Normative) Sampling requirements of test sample ... 12
Appendix B (Normative) Test method and judgment requirements of melting behavior
... 14
Appendix C (Normative) Test method and judgment requirements of capability to repel
fuel or lubricant ... 18
References ... 20
Flame resistance of commercial bus interior materials
1 Scope
This document specifies the technical requirements, test methods, implementation
transition period requirements, for the flame retardant properties of interior materials
for commercial bus.
This document is applicable to the evaluation of flame retardant properties of grade B
and grade III bus interior materials, in category M2 and category M3.
This document does not apply to school buses.
2 Normative references
The contents of the following documents constitute the essential provisions of this
document through normative references in the text. Among them, for dated references,
only the version corresponding to the date applies to this document; for undated
references, the latest version (including all amendments) applies to this document.
GB/T 2406.2-2009 Plastics - Determination of burning behavior by oxygen index -
Part 2: Ambient-temperature test
GB/T 5454 Textiles-Burning behavior - Oxygen index method
GB 8410 Flammability of automotive interior materials
GB/T 8626 Test method of flammability for building materials
GB/T 8627 Test method for density of smoke from the burning or decomposition of
building materials
GB/T 10707 Rubber - Determination of the burning
GB/T 11785 Reaction to fire tests for floorings - Determination of the burning
behavior using a radiant heat source
GB/T 15089 Classification of power-driven vehicles and trailers
GB/T 20285 Toxic classification of fire effluents hazard for materials
GB/T 32086 Requirement of vertical flammability characteristic and test method for
certain category automobile interior material
JT/T 1094 Safety specifications for commercial bus
3 Terms and definitions
The terms and definitions, as defined in GB/T 15089 and JT/T 1094, as well as the
following terms and definitions, apply to this document.
3.1
Oxygen index
Under the specified test conditions, when the mixed gas of oxygen and nitrogen at
a temperature of 23 °C ± 2 °C is introduced, the minimum oxygen concentration,
that can just maintain the combustion of the material, expressed in volume fraction.
[Source: GB/T 2406.2-2009, 3.1, modified]
3.2
Density of smoke
The measure of the amount of smoke, which is produced by a material, under
specified test conditions, expressed by the attenuation of light intensity passing
through the smoke.
[Source: GB 38262-2019, 3.5]
3.3
Smoke toxicity
The degree of damage or injury, which is caused by the toxic and harmful substances
in the smoke.
[Source: GB 8624-2012, 3.19, modified]
3.4
Melting behavior
The characteristics of melting droplets, foaming and other phenomena of material,
under the impact of thermal radiation.
3.5
Capability to repel fuel or lubricant
The ability of the material to remain non-wetted, under the action of contact with
fuel oil.
3.6
Commercial bus interior materials
Single material or composite materials, which are used in commercial bus.
Note: The interior materials of commercial bus do not include electrical components (such
as air-conditioning assembly control switches, wire harnesses, electrical control panels,
navigators, radios, DVD modules, driving instrument clusters, and other electrical modules),
lamps, steering wheels, airbags (curtain), body damping pads, sandwich panels whose outer
layer is made of metal materials and whose inner layer is made of non-metallic materials.
3.7
Single material
A homogeneous monolithic material, which is composed of the same material.
Note: If different materials are intermittently joined together (such as sewing, welding,
riveting), this material is not considered to be a composite material, BUT each material is a
single material.
[Source: GB 8410-2006, 2.3, modified]
3.8
Composite material
The material, which is formed by two or more layers of similar or different materials,
the surfaces of which are fully and tightly bonded together by different methods
such as welding and bonding.
[Source: GB 8410-2006, 2.2, modified]
4 Technical requirements
4.1 Material classification
The interior materials of commercial bus shall be classified according to the applied
materials in Table 1, included interior materials, used parts.
4.2.2 The size of the interior material shall be measured according to the largest
rectangle, which is covered by the projection of its components assembled in the vehicle
facing the occupant direction.
4.2.3 Interior parts, that meet the following minimum size requirements, shall be tested
for flame retardancy:
a) Interior parts, which have a width not less than 100 mm and a length not less than
356 mm;
b) The same type of interior parts used inside the vehicle, which has a width of not
less than 100 mm, the length of less than 356 mm but not less than 138 mm,
meanwhile has an accumulative use length of not less than 1000 mm;
c) The same type of interior parts used inside the vehicle, which has a width of not
less than 100 mm but not less than 20 mm, the length of less than 356 mm,
meanwhile has an accumulative use length of not less than 2000 mm.
4.2.4 If the interior parts contain cavities, meanwhile the parts without cavities do not
meet the minimum size requirements, the test can be exempted.
4.2.5 When the interior parts can be separated into single material and composite
material, the test results of the separated materials shall be judged according to the
requirements in Table 2.
Example:
If the side panel is composed of PVC skin wrapped PP sheet, the PVC skin after splitting shall
be judged according to the technical requirements of "Others" in Item 5 "Leather material" of
Table 2; the PP sheet shall be judged according to the technical requirements of Item 1 "Interior
panel" in Table 2.
4.2.6 When interior materials of the same material, process, thickness, manufacturer are
used in multiple parts, the technical requirements shall cover the maximum limit
requirements for all parts of the interior material.
5 Test method
5.1 Sampling of test samples
Sampling shall be carried out, according to the provisions of Appendix A.
5.2 Horizontal combustion
Carry out the test, according to the provisions of GB 8410.
5.3 Vertical combustion
Carry out the test, according to the provisions of GB/T 32086.
5.4 Oxygen index
5.4.1 Textile materials shall be tested, according to the provisions of GB/T 5454.
5.4.2 Rubber materials shall be tested, according to the provisions of GB/T 10707.
5.4.3 Plastics, fiber-reinforced plastics, leather materials and other materials shall be
tested, according to the provis...