This standard specifies the method for determining the plasticity of raw rubber and mixed rubber using a rapid plasticometer. This standard is applicable to the determination of plasticity of various raw rubber and mixed rubber. GB/T 3510-1992 Determination of plasticity of raw rubber and mixed rubber by rapid plasticometer method GB/T3510-1992 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Determination of plasticity of raw rubber and rubber mix
Rapid plastimeter method
Rubber, unvulcanized-Determination of plasticity-Rapid plastimeter methodGB/T 3510-92
Replaces GB351083
This standard is equivalent to the international standard ISO2007-1991 "Determination of plasticity of raw rubber and rubber mix-Rapid plastimeter method". 1 Subject content and scope of application
This standard specifies the method for determining the plasticity of raw rubber and rubber mix using a rapid plastimeter. This standard is applicable to the plasticity determination of various raw rubbers and rubber mixes. 2 Test instrument
2.1 The rapid plastimeter consists of the following components (see the structural diagram): 2.1.1 The pressure head and the bottom plate with an annular heating jacket, whose circular working surface is flat, smooth and can move relatively. The indenter and the chassis are equipped with heating devices to keep the sample and the surrounding environment within the specified test temperature. The indenter is a cylinder made of stainless steel with one of the following diameters: 7.3±0.02mm, 10.0±0.02mm, 14.0±0.02mm, and its effective length is 4.5±0.15mm. The selection of the indenter diameter during the test should make the measured plasticity value between 20 and 85, and the 10mm indenter is specified as the standard indenter. The chassis can be made of stainless steel or chrome-plated bronze, and its diameter should be slightly larger than the indenter diameter. It is surrounded by a heating jacket and its effective depth is 3.5±0.25mm. 2.1.2 The instrument can move any of the two planes of the indenter and the chassis perpendicular to the other surface, and can compress the sample to a thickness of 1.00±0.01mm. Regardless of whether there is a sample between the indenter and the chassis, the movement of the indenter or the chassis should be completed within 2s. The minimum pressure requirement is 300N and can be adjusted appropriately with the help of springs. 2.1.3 The instrument is equipped with a device to apply 100±1N compression force to the sample vertically. 2.1.4 The instrument should be equipped with a device to measure the distance between the pressure head and the chassis, that is, to measure the thickness of the sample under compression, with a sub-scale of 0.01mm.
2.1.5 Automatic timing device, in seconds, and accurate to 0.2s. The structural principle of the rapid plastic meter is shown in the figure: Approved by the State Bureau of Technical Supervision on December 12, 1992 176
Implementation on October 1, 1993
GB/T3510-92
Structural principle diagram of the rapid plastic meter 1)
1-beam; 2-pressure head? 3--chassis: 4-electromagnet; 5-support rod; 6-pressure relief spring, 7-toggle; 8-small spring, 9-main rod; 10-pressure spring 11-thickness measuring device (dial indicator) 2.2 Slicer
The slicer consists of a flat-bottomed circular anvil and a tubular coaxial knife. The transmission device of the slicer is connected to the handle. The film can be pressed to a thickness of about 3mm by adjusting the height of the guide column of the machine, and a cylindrical specimen with a diameter of about 13mm and a constant volume of 0.4±0.04cm can be cut out.
3 Preparation of test specimens
3.1 Take samples from different parts, and then cut about 30g of film from the homogenized sample. Thin it with a cold roller for 3 times. After the third thinning, the film thickness is about 1.7mm. Fold the film in half immediately and press it gently to make the two films fit tightly. There should be no pores between the films. The thickness of the film after pressing should not be greater than 4mm. Then cut the sample that meets the requirements of Article 3.2 from the slicer. 3.2 For the mixed rubber sample, a small piece of smooth, non-porous film with a thickness of 3 to 4mm can be directly cut from the uniformly mixed rubber material, and a sample that meets the requirements of Article 3.2 can be cut from it.
4 Test temperature
This test should be carried out at 100±1℃.
Instructions for use:
1) There is no such figure in IS02007.
5 Test steps
GB/T 3510—92
5.1 After the pressure head and the bottom plate of the instrument have been heated and stabilized for 10 minutes, two pieces of bleached, matte, acid-free and tough tissue paper with a specification of 35mmX35mm and a thickness of 0.025±0.005mml (about 17g/m2) are placed between the pressure head and the bottom plate. After closing, adjust the zero point of the thickness measuring device before and during the formal test. In the "preheating stage", the thickness measuring device should indicate 1.00mm, that is, the distance between the upper and lower pressing plates is 1.00mm plus the thickness of two thin papers.
Note: Domestic 17g special-grade paper can be used. 5.2 Place the sample between the two pieces of thin paper mentioned above, so that the sample is in the middle of the chassis and must not be skewed, then start the plastic meter to compress the sample to 1.00±0.01mm, preheat for 15+s at this thickness, so that the sample reaches 100±1C, and after preheating, automatically Apply 100±1N compression force to the sample for 15±0.2s, and read the thickness immediately to 0.005mm. 5.3 If the thin paper breaks during the test, the test is invalid and should be re-measured. 6. Representation of test results
The thickness reading of the sample at the end of the test is converted into a rapid plasticity value. 0.01mm represents a rapid plasticity value, and the median of the three samples is the measurement result, and the result is expressed in integers. The maximum and minimum values ​​of the three samples The difference between the two values ​​should not be greater than 2 plasticity values, otherwise the result will be invalid and the test needs to be repeated.
7 Test report
Detailed description of the test sample (including sample name, source and preparation), the name or number of the standard based on which the test is conducted,
The size of the indenter used in the test;
Test temperature;
Test results;
Test room temperature:
Tester;
Test date;
Other necessary instructions.
Adoption instructions:
1) ISO2007 does not have a paper thickness specification.
Additional instructions:www.bzxz.net
This standard was proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Beijing Rubber Industry Research and Design Institute of the Ministry of Chemical Industry. This standard was drafted by the Guangzhou Rubber Industry Research Institute. The drafters of this standard are Chen Shuhua, Huang Peiying and Yan Lizhi. This standard is entrusted to the Beijing Rubber Industry Research and Design Institute for interpretation. 178
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