HG/T 2412.2-1992 Test method for rubber threads Determination of rubber thread count HG/T2412.2-1992 Standard download decompression password: www.bzxz.net

Chemical Industry Standard of the People's Republic of China
Test method for rubber thread Determination of rubber thread count HG / T 2412. 2 -- 92wwW.bzxz.Net
This standard is equivalent to the fourth part of the international standard ISO2321-1983 "Rubber thread-Test method". Subject content and scope of application
This standard specifies the method for determining the count of rubber thread. This standard is applicable to rubber threads made of natural rubber and natural rubber latex, and also to rubber threads made of mulberry isoprene rubber. 2 Reference standards
HG/T2412.1 Test method for rubber thread Determination of rubber thread millimeter value HG /T2412.3 Test method for rubber thread Determination of rubber thread density 3 Definition
3.1 Cross-sectional count
The cross-sectional count of a rubber thread is obtained by multiplying its cross-sectional area in square millimeters by 1000. 3.2 Conventional count (specification)
3.2.1 The conventional count of rubber wire refers to the number of rubber wires that can be arranged side by side within 25.4 mm. The conventional count of round rubber wire can be obtained by dividing 25.4 by the diameter of the rubber wire (in millimeters), and the conventional count of square rubber wire can be obtained by dividing 25.4 by the side length of the rubber wire (in sides). The conventional count of rectangular rubber wire usually refers to the count of square rubber wire with the same cross section. For round rubber wire, the specification of 100 refers to the conventional count of rubber wire with a diameter equal to 0.254ⅡⅡ; for square rubber wire, the specification of 40 refers to the conventional count of rubber wire with a side length equal to 0.635ⅡⅡ. 3.2.2 The conventional count of a round rubber wire is usually expressed by using the regular count of the rubber wire and the integer or even number of the actual regular count of a square rubber wire with approximately the same cross-sectional area (count of round rubber wire × 1.13 = actual count of square rubber wire). For example, a round rubber wire with a count of 50 is expressed as 50/56. 3.2.3 The conventional count of multiple round rubber wires is expressed by sequentially indicating the number of components and the count of a single rubber wire with the same total cross-sectional area as the combined rubber wire and the count of the corresponding square rubber wire. For example, the conventional count of a plurality of round rubber wires consisting of three rubber wires can be expressed as a single 32-count rubber wire with the same total cross-sectional area as the three wires. That is, 3/32/36. 4 Test steps
4.1 Determine the mass of five 1000 mm long specimens according to the relevant provisions of standard HG/T2412.1 4.2 Determine the density of the specimens according to the relevant provisions of standard HG/T2412.3. 5 Result expression
5.1 The cross-sectional count S is calculated as follows:
Approved by the Ministry of Chemical Industry of the People's Republic of China on October 22, 1992, and implemented on July 1, 1993
HG/T2412.2-92
S=1000
Where: p-density of rubber wire, Mg/m\;
m-mass of rubber wire with a length of 1 000 mm, g/m, 5. 2 The conventional count C of the rubber thread is calculated as follows: Round rubber thread:
Square rubber thread:
C = 25. 40
Wherein: p—density of rubber thread, Mg/.m;
mass of rubber thread with a length of 1000mm, g/m,
5.3 As described in Chapter 3, the count of the rubber thread shall be expressed by the median value of 5 specimens. The maximum and minimum values ​​obtained shall also be indicated. 6 Test report
The test report shall include the following contents:
&,·Source of specimen and identification mark
Relaxation treatment of the selected melon;
Test temperature;
Count of the specimen;
Test period:
Tester.
Additional Notes:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Latex Industry Research Institute of the Ministry of Chemical Industry. This standard was drafted by the Latex Industry Research Institute of the Ministry of Chemical Industry. The main drafters of this standard are Li Xiaomei, Ruan Xu, and Tan Yunhua.
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