This standard specifies the method for determining the apparent density of leather. This standard is applicable to all types of leather. QB/T 2715-2005 Physical and mechanical tests on leather - Determination of apparent density QB/T2715-2005 Standard download decompression password: www.bzxz.net

JCS 59.*40
Classification number: Y45
Reference number: 157672005
Light Industry Standard of the People's Republic of China
OB/T 2715—2005
Substitute Q3/13812.10-1909
Leather
Physical and mechanical tests
Determination of apparent density
Leather-Physical and mechanical tests-Determination of apparent density(1S0 2420:2002, Leather--- Physical and mechanical tesis -Determination of apparent density,MoD)2005-03-19 Issued by
National Development and Reform Commission of the People's Republic of China on 2005-09-01 Implementation
This standard is the standard for the measurement of single-phase requirements of QB/3812.10--1999. CHH/T27152005
International standard adopts TS02420:2002 (physical and mechanical test methods). This international standard is based on the international standard TOS standard P5 of the Federation of Engineers and Chemists (TOS).
QB/13812.10-1999) is equivalent to 1SO2420:1972, S02420 revised: 1902430:2002 1S02420:1972
This standard is based on TS02420:2002. This standard is based on the international situation in China: the following measures were taken when adopting 1S02420:2002 Length of technical revision: · The original length of “current normative reference document” was rewritten as the corresponding standard with the incomplete figure. According to the national standards, part 5 of the test sample was further modified and divided into 5.1, 5.2, and 5.3 for the convenience of comparison with the standard in use. · The “test method” of part 5 was deleted. · The requirements for the identification of the vehicles in the market were increased. This standard also made the following modifications: In addition to the foreword of the SO standard, the term “this international standard” was changed to “this special standard”, “use decimal points as decimal points” was used, and “this standard - QB/3812.10-1999” was compared with the other two changes: 2 “normative application document” was added. · The “preparation of test samples” was added. This standard was proposed by the China Light Industry Federation. This standard was returned to the factory by the China Industrial Standardization Technical Committee (ACC252). This standard was established by China Academy of Light Industry.
Early author of this standard: Vietnamese
This standard was first issued in October 1954 as the original national standard GB4682.10-1984, and was converted into the industrial standard B/T2812.10-1999 in April 1999 as the first revision. It replaced the original National Light Industry Bureau issued about 1999 Light Industry Standard QHT3812.10 1999 Leather Standard Determination
1 Scope www.bzxz.net
Determination of apparent density of leather This standard specifies the determination method of certain apparent density points of leather. This standard is comparable to other standards in various regions
2 Normative reference documents
QH/T2715-2CC5
The above-mentioned provisions are not included in the standard through reference in this standard. It is the H-period file that can be used with all previous revisions (not including the error-free version) of the film. However, according to the policy, only the new version of these files can be released according to the standard. Please note that the same file of the H-period is not up to standard! The new service technology is running on the pressure of one person. Q/270G2005 leather chemistry, physical, vibration F: color fastness test sample <1SO2418.2002: M01QB: T2707-2005 composition and reducible test test column 9 each in the source section (IS02419: 2002M0)) (/T2709-2005 leather reed elastic and mechanical test unit rot (TS () 2589: 2002, M) D) 3 original short || tt || will be selected as a rule of the main description, through the original direct production of the sample volume: catties divided by three of the sample is the light visual consultation || tt || 4.1 lifting force || tt || in line with QB/T2707-2005 current provisions, the inner wall is national 3, the vertical grab is 71mm4. 2 Test according to the provisions of QH/12?U·-2 small I5, 4.3 Balance 0.00:8 4.4 Vernier caliper 0.00:8 4.5 Vernier caliper 0.00:8 5.5 Preparation for selection and reduction of samples 5.1 Samples shall be prepared in accordance with the provisions of Q/T2706-2005. 5.2 Sample reduction shall be carried out in accordance with the provisions of Q/T2707-2005. Use a die knife (4.1) to cut 3 samples at a time. 5.3 Test air conditioning
Contact QD/T2707-2005
6 Procedures
6.1 Test conditions
The test conditions should be in accordance with the standard QB/T2715-2008/T2707-2005
6.2 Determination of thickness
Measure the thickness of the sample in accordance with the provisions of QB/T2709-2005. When measuring, take meters as the unit, select one point to measure: this point is 2mm away from the center of the fence, forming an equilateral triangle, measure the center of the sample, and take the average of the four points as the thickness of the test fence:
Note: The selected center and the other three points can be used for estimation. 6.3 Determination of diameter
The diameter of the measuring plate of the vernier scale (4.4) is 0.05 mm. Measure twice on the pulled noodles and meat noodles respectively. The two measuring points are used as the average value of the four measured values ​​as the diameter of the sample. If the diameter error of any sample is less than 0.5mm, the test is abandoned. 6.4 Determination of mass Weigh the mass of the sample with an average weight to the nearest 0.001g. The result is expressed as the density D of the test column, expressed in kg/m3 at point T, calculated as (1): 1.273×10*×m. The apparent density is expressed in grams per cubic meter (ke/m). The unit of mass of the sample is milligrams (m). The unit of mass of the sample is grams (m). The average value of the apparent density of the three samples is used as the calculation result. Note: The sample volume is in cubic meters, and the formula below is used to calculate the X×
system. 1.2 The calculation of the maximum store,
sweat 2: The skin density is generally expressed as g/cm2. If it needs to be expressed in this unit, 1/n1kg/m2, 9 Test report
The test report should contain the following content
a) Standard number:
Crystal name number, code;
Detailed information of the sample, the case where the rubber sample is consistent with QB/2706-2005-1: c)
Test conditions (standard air: 20℃/65% or 23C/50%): Test results (simulated density: kg/):
Differences between actual operation and this standard. ()
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