This standard specifies the method for determining the tearing force of leather - the double-sided tearing method (Baumann tearing). This standard is applicable to all types of leather. QB/T 2711-2005 Physical and mechanical tests for leather Determination of tearing force: double-sided tearing QB/T2711-2005 Standard download decompression password: www.bzxz.net

ICS 59. 14C
Classification number: Y45
Passenger number: 57632005
Light Industry Standard of the People's Republic of China
QB/T2711—2005
Replaces QB/T3312.6-199y
Leather physical and mechanical tests
Determination of tear load; Double edged tear
Leater-Phvsical and mechanical testsDetermination of tear load; Double edged tear
Leater-Phvsical and mechanical testsDetermination of tear load; Double edged tear iearMoD)2005-03-19 issued
National Development and Reform Commission of the People's Republic of China2005-09-01 implementation
This standard is in line with QB/T3812.6-19996 single-phase force test element: QR/T27112005
This standard is in line with T50332:20026 Physical and mechanical tests on leather - Determination of tearing force - Part 2: Double-sided tear 3Tealhcr—Physiual urid mcechaniual esls—lhctwminuliot of car Joal—Pt 2: Loublc icar>, i National i Standard Mao Shi Federation of Leather Chemists TC) you can IUP. OD/T3312.6-199 is equivalent to 1S03377: 975.1S033771, which has been ordered. IS01377: 2002 replaces TS03377: 1975. This standard adopts 1S03.377-2: 2002. This standard adopts the actual situation in my country: 1803377-2: 20) 2, and the following technical characteristics are verified: "Normative documents" will be quoted in the ISO standards, and rewritten as relevant standards in my country: the requirements for tensile testing machines are simplified, and the requirements for compression 5075001 are cancelled: - According to the three habits, the sampling of 5. "Nude" is used as a common service, and the clause number is written! Extension is to prevent incorrect understanding of the standard in use, except for .1! Reference "Note": This standard also made the following modifications: 13 Foreword:
Change "international standard" to "this standard" with "decimal point", "replace the decimal point with the decimal point" This standard is different from QF/T3R126-1999, with the following changes: 2 "residual normative references", 5 "preparation of test specimens" and cancel the content of Chapter 5 of the original standard.
This standard was proposed by Shandong Light Industry Federation and issued by National Leather Industry Standards Association of China. C252! The unit responsible for the development of this standard is China Leather Printing Industry Research Institute. The main drafter is China:
This standard was first issued in October 1984 as the original national standard B4639.6-1984, and was converted to the light industry standard QB/T3812.6-1999 in April 1999. This paragraph is for the purpose of prohibition. During the implementation of this standard, the light industry standard QB3812.619 issued by the State Light Industry Council contains the determination of tear resistance
1 Scope
QB/T 2711—2005
Physical and mechanical tests for leather Determination of tearing force: Double sided tearing This standard specifies the determination of tearing force of leather of various types. 2 Normative references
Double sided tearing method (Baumann tearing method)>
The provisions of the following documents shall prevail over the provisions of this standard: All documents with a specified date and any subsequent amendments (not included in the scope of this standard) shall not apply to this standard. However, the latest version of the document can be used only if the parties reach an agreement on this standard. The latest version applies to non-standard items. QB/T270G2005 Standard Test Sample for Leather Products (LSO24t: 2002, MOD) Preparation and Adjustment of Physical and Mechanical Test Samples (TSO2414: 2002.MOD) QB/T2707-2005
QB2709-2005 Leather 3 Principle bzxz.net
Look at the shape of the sample (: There are two variables in the upper and lower parts of the tensile test machine. 1. The maximum force delivered when the tensile test machine is running is the gradual cracking of the sample. 4 Device
4.1 Tensile testing machine
The tensile test hole should meet the following requirements:
One-way pressure and the object to be tested are matched:
Actual H (1(0=2 0) mm/m speed pull to do this effect 4.2 test you
see 1, steel material requirements, bar, length (1010.1) m, original (2 = 0.1) mm, part length to (12 2 0.1) m, the test hook should be extended into the tensile test again. Figure 1 test hook
- issued into a straight negative hook shape, Bay
QB/2711-2005
4.8 Hall instrument
in accordance with the provisions of QR/T27092005.
4.4 Floor force
in accordance with the provisions of QB/T27072005, nearly a price movement to take 2 specified specimens, the mold knife 1 should contain the same industry blood. 5 Sampling and preparation of test specimens 5.1 Sample preparation According to the filter method of QB/T2706-2005: 20±1 Figure 2 Sample shape 5.2 Preparation of test specimens According to the provisions of QB2707-2005, 6 test specimens are taken from the grain surface with a die cutter (4.4), and the long sides of 3 test specimens are parallel to the vertical narrow line of the 3 test specimens. 5.3 Air conditioning of test specimens According to the filter method of QB/T2707-2005: 5.4 Determination of test specimen thickness According to the determination of QB/T2709-20US, the thickness of the test specimen is determined. 6 Procedure || tt || 6.1 Adjust the control force testing machine and gently control the test hook part: put the two test hooks into the holes in the test fence and make sure the wide side of the test hook part is parallel to the square edge of the hole in the test fence so that the test can be taken off. 6.2 Dynamic tensile testing machine, self-test tear rate is 1.: record the maximum value 6.3 Verify 6.1-~6.2, test other test details The test report should include the following contents: a) Unmarked number: Sample name, number, type, detailed information of the sample, if the sample is not consistent with QB/T2711-2005 (6-2W5); d) Test conditions (standard air: 20/65% or 23/50%); f) Average tear force value of the specimens with 3 long sides parallel to the back line; 3) Average tear force value of the specimens with 3 long sides perpendicular to the back line; Average tear force value of 6 specimens: The actual operation is different from the standard.
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