This standard specifies the test method for the horizontal combustion performance of leather. This standard is applicable to all kinds of leather with flame retardant performance requirements. QB/T 2729-2005 Determination of horizontal combustion performance of leather physical and mechanical tests QB/T2729-2005 Standard download decompression password: www.bzxz.net

ICS 59. 140
Classification number: Y45
Reference number: 15781-2005
Light Industry Standard of the People's Republic of China
QB/T2729—2005
Leather Physical and mechanical tests-Determination of resistarice to horizontal spread of flame2005-03-19 Issued by
National Development and Reform Commission of the People's Republic of China on September 1, 2005. Implemented by
QB/T2729-2005
This standard adopts the standard of the Chinese Association of Chemical Engineers (SACE): Standard P4 for the measurement of flame retardancy and thermal conductivity. This standard has been internationalized as TSO/NP17074:i014 Physical and mechanical properties of nuclear power equipment for the measurement of flame retardancy and thermal conductivity. This standard is consistent with IS03795:1089 for the determination of flame retardancy of road vehicles and machinery in agriculture and torestry. 1IP7 standard is adopted, and the following technical modifications are made - in addition to the use of "[503795" in the specification, it is "": in the "standard text", the original referenced P standard is rewritten as the relevant standard of the cabinet of the third pressure cabinet, and the installation part of the standard is reported in 503:1. This standard text directly describes the device, and the small mark is used to promote use. The installation part in TS0375:19R9 is directly converted into the content of this standard, and should be installed as shown in the corresponding ugly figure 1 Figure 5), the original Figure 1 becomes Figure:
, for the exclusive use of: "Technical" chapter, the rest of the chapter is extended; in order to prevent the incorrect interpretation of the standard from being reused, the original 5.6, 6.7, and the original 5.5 were downgraded to "5.2".
In addition to the IUP standard, this standard has also been revised in accordance with the compilation:
"This ILLTCS standard is promoted" to "standard" with a decimal point, and the first decimal point is replaced by an appropriate number. "Standard library! The industrial cooperation association will propose it.
This standard will be revised by the industry standardization technical committee (SAC/TC252! This standard is issued by Zhejiang Huixiasen Industrial Co., Ltd. and China Leather and Footwear Industry Research Institute. The original authors are Cheng Jian, Xu Huanhai, Xian Shafeng and Shi Jie. This standard specifies the test methods for the water-tightness and fire-tightness of leather. This standard is applicable to leather with various requirements for fire resistance. 2 References to resistance to standardization Determination of horizontal combustion performance QB/T2729—2005 The following clauses are used as non-standard clauses by the requirements of the standard. For all cited documents, subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the latest versions of these documents shall apply to the outdated versions of these documents. For all outdated referenced documents, the latest versions shall apply to this standard. QR 270G Leather Chemical, physical, mechanical and colour fastness test sampling location QB/T 27U7 Leather physical and mechanical test standards for various adjustments QB/T 2700 Leather
Comparison and range test thickness determination
3 Principle
The sample will be held horizontally on a U-shaped bracket and ignited in a tower burning box for 15 minutes. The flame will be ignited at the outlet of the specimen. The test will determine the double-size flame, or the filter flame, as well as the burning distance and the combustion distance of the specimen. 4 Technical specifications and definitions
The following technical specifications and definitions apply to this standard
The burning velocity
The ratio of the economic value obtained by this standard to the burning standard is expressed in milliseconds per minute (m) 4.2
The burning distance
The length of the internal burned part should be 5.1 The combustion box
It can be made of stainless steel (see Figure 1, only 2 inches are shown. The front part of the combustion pin is equipped with a heat-resistant glass inspection box, which can be tightly covered with a cover. Yes, it can also be made into a type inspection window. The bottom of the combustion box has a support, the top has a ventilation shield, and the entire combustion box has 4 10mm high supports. The combustion box is equipped with a support for the sample. There is a rail around the inside of the combustion box. There is a small door on the door that is used for passing through, a seat for receiving gas lamps, and a height indicator plate. The bottom of the combustion box is a secret tray (see Figure 3). This tray is placed between the two rows of ventilation holes without affecting the ventilation of the ventilation holes.
QB:T 2729- 2305
: 1 gas lower seat: 2 1 lift gas: 3 sample × to special machine: 4 1 fire F is the effect: 5 1 door: 6 1 door constant: 7 1 combustion environment light to work 8—, 4 time: record bottom [1 Ni learning to mention: 1 current case through the real, 12 1 bracket pin: 13 support rate:? Sample—lower bracket: 1 effect view density: 17 palm with uniform 4 burning box
(let the grid and figure
61 5163.5365.
(section)
Figure 2 Schematic diagram of the size of the combustion oven
Figure 3 Collection tray
QT/T2729-2JJ5
OB/T2729-2005
5.2 Sample support
H is made of two V-shaped corrosion-resistant metal plates, and the size must be smaller than Figure 4. Six pins are installed on the support, and there should be a brocade ceremony on the upper side to ensure the test condition. The pins also mark the starting point (first mark) and the end point (falling mark line) of the center of the fire. In addition, the support is equipped with 6 pins at the bottom, and the lower plate of the support has a height of 25m and a hot metal support line with a wire diameter of 0.25mm (see figure). The support is used in accordance with the specific situation. The sample surface should be above the bottom of the combustion chamber, 178mm. The distance between the front end of the sample frame and the inner surface of the combustion chamber should be 22mm, and the inner surface of the combustion chamber on both sides of the frame should be 50mm (see Figure 2 and Figure 4). Figure 4 Sample frame Figure 5 Lower frame surface diagram QA/T27292005 5. 3 The inner diameter of the gas lamp is 9.5mm. When the gas lamp is placed in the combustion chamber, the center of the mouth of the sample is 19mm below the center of the mouth (21mm). 5.4 Test gas The gas supply test gas can be completely burned. The heat of the test gas is 3SM, such as natural gas, coal gas, and 5.5 seconds. The temperature should not be less than 5s. 5. 6 The leather thickness meter meets the requirements of QB/T2705. 5.7 The temperature meter range should be 10 to 10. 5.8 The steel ruler should be made in Korea. 5. The ventilation plate should be placed in the ventilation loss, and the internal volume of the ventilation plate should be 2-10 of the width of the tower box. The length, width and height of the H-type should not exceed 2.5 times the smaller of the other two rulers. Before the test, the environment should be determined and the flow rate should be 0.1-g. 0.3m/3.
Sampling and sample preparation
6.1 Sampling
According to the professional instructions of QB/T27QG
6.2 Preparation of samples
Take 3 secondary warehouses, the shape and size shall be in accordance with the shape and size of Figure 6, the length shall be parallel to the static line, 6.3 Air conditioning of samples
According to the provisions of QRT2707
Figure 6 Sample
7 Procedure
7.1 According to the provisions of QB/2709 Section 4
QB/T 2729-2005Www.bzxZ.net
7.2 Put the test bar into the test rack (5.2. Make the two long sides and one band of the sample be supported. When the test width is long, the U-shaped bracket can be small, and the test end can be soft and the product can be monitored. When the test is not dangerous, the sample is collected on the heat-resistant gold wire sample bracket for combustion test. 7.3 Turn off the light of the gas lamp in the air inlet and ignite the gas. The fire is gradually increased and the fire height is (38±1m: After the flow is stable, the fire box should be at least 5m stable in this state. 7.4 Push the sample bracket (5.2) into the combustion chamber (5.1), place the sample in the combustion box, and place it in a horizontal position so that the daytime end of the sample is in the flame, and then burn (15.5) 5, and then select the flame (close the gas door). 5. The flame moves forward from the end of the test tube, and the flame spreads at the moment it passes the first mark. Observe the flame spread evenly on the surface of the product. 6. When the flame reaches the second mark or the flame reaches the second mark, stop the test tube immediately. If the flame is about to go out before reaching the first mark, the total burning distance from the first mark to the time when the flame goes out is 5. If the sample is not burning or before the starting point, the combustion rate is D mm/min. 7. During the last test, the temperature of the combustion chamber should be kept below 30 °C. Expression of results: The combustion rate of the product should be expressed in meters and the calculation formula (1) should be: 60
——Burning speed, unit: mn/min—Burning, unit: m
! 1. Burning time (burning time, unit: seconds, with burning time as the test result.
9 Test report
The test report shall contain the following contents:
This standard is compiled by:
Sample name, serial number, type, manufacturer (or manufacturer):
Test conditions (temperature, humidity):
Test results (burning speed is expressed in mm/n): f) Differences found in the test between the actual test method and this standard:
Test personnel, previous period.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.