This standard specifies the standard rubber compounding ingredients, test formula, rubber compound mixing procedure and test methods to identify the physical and mechanical properties of carbon black in natural rubber. This standard is applicable to the identification of various types of carbon black for rubber. GB/T 3780.18-1998 Carbon black in natural rubber formula and identification method GB/T3780.18-1998 Standard download decompression password: www.bzxz.net

GB/T 3780.18—1998
This standard is the test method standard for carbon black products for rubber. GB/T 3780.18-88 is revised according to the American Society for Testing and Materials standard ASTM D31926 Carbon
Test method for identification of carbon
in natural rubber. This revision is equivalent to ASTM D310296.
The main technical differences between this standard and ASTMD3192 are: 1) ASTMD3192 stipulates three mixing procedures: A method-open mill method, B method-internal mixer method, C method-micro internal mixer method, this standard only stipulates the mixing procedure of the open mill, 2) Mixing batch, ASTMD3192 stipulates that it is four times the standard formula, and this standard stipulates that it is three times. The main technical differences between this standard and GB/T3780.18-88 are as follows: the vulcanization time of the mixed rubber and the parking time of the vulcanized test piece have changed. 1. This standard adds the sampling and precision chapters, and combines Chapter 1 and Chapter 8 into one chapter titled Preparation and Testing of Vulcanized Rubber Test Pieces. Delete Chapter 9 "Representation of Test Results". This standard replaces GB/T 3780.18-88 from the date of implementation. This standard is proposed by the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of the Carbon Black Sub-Technical Committee of the Technical Committee for Standardization of Rubber and Rubber Products. Drafting unit of this standard: Carbon Black Industry Research and Design Institute of the Ministry of Chemical Industry. The main authors of this standard: Hu Kaiqun, Wang Jingtian, Xue Jie. This standard was first issued in June 1983 and revised for the first time in April 1988. 1 Scope
National Standard of the People's Republic of China
Carbon black in natural rubber: Recipe and evaluation method CB/T 3780. 18-1998
Replaces GB/T 780.1888
This standard specifies the standard rubber compounding ingredients, test formula, rubber mixing procedure and test method to evaluate the physical and mechanical properties of carbon black in natural rubber.
This standard is applicable to the evaluation of various types of carbon black for rubber. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. This standard is published and the version shown is valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest version of the following standards. GH/T528-1998 Determination of tensile stress-strain properties of thermoplastic rubber or thermoplastic rubber GE3778-91 Ironing black for rubber
GB 61038-93 Rubber test Rubber mixing, mixing and vulcanization equipment and operating procedures HG/T2725-95 Bulk natural method 3 Standard test formula
Standard test formula is shown in the table below.
Natural rubber
Stearic acid
Regulating agent M
1) Rubber should be kept dry, clean and tough. Technical specifications
First-class amine
2) Identification of N800 series and N90U series of expensive points, ironing black weight is 75. 0G. 4 Equipment
Mixing and vulcanizing equipment shall comply with G6038 and the following specifications, and its main technical features are as follows: 4.1 Open-type rubber mixing mill\
Adopts Bay specification:
or partial-effect
1A5TM1331026 adopts three-mud mixing method, namely A method-open-type rubber mixing mill method, B method-internal mixer method, and core method-micro internal mixer method. Approved by the State Administration of Quality and Technical Supervision on November 4, 1998, and implemented on June 1, 1999
a) Roller diameter (outer diameter): 150~155mmGB/T 3780. 18.--1998
b) Front roller (slow) speed: (24 up 1) 1/min: c) Roller speed ratio: 1.0:1.4;
d2 baffle operation distance: 190~210 mm: e) Gap between two rollers (adjustable); 0.2~8.0 mm. 4.2 Flat plate vulcanizing machine
4.2.1 The force applied by the vulcanizing machine to the mold should not be less than 3.5MPa: 4.2.2 The heating half plate should have enough size to make the vulcanizing mold not less than 75nm from the edge of the plate, 4.2.3 The parallelism of the heating plate should not be greater than 0.25mm/m. 4.2.4 The temperature difference between the center and edge of the heating plate should not exceed +14.3 The vulcanization mold is made according to the size of the vulcanization test piece of 150 mm × 1.50 mm × 2 mm and the effective area of ​​the bowl vulcanization equipment. The material is medium carbon steel or stainless steel. The surface of the mold cavity should be chrome plated or plated, and the roughness Ra is not greater than 1.6 μ11. The original thickness of the mold cover and the mold bottom should not be less than 10 mm.
5 Preparation of carbon black samples
5.1 Sampling according to GB 3778 or HG/T2725 5-2 Carbon black samples should be placed in a (105 ℃ 2) ℃ oven for 1 hour before mixing. During heating, the size of the container containing the carbon black sample should ensure that the black layer sequence is not greater than 1mm. The baked carbon black sample is placed in a sealed moisture-proof container until the test is completed. 6 Mixing
6.1 Ingredients
6-7. The batch size of the mixed product is in grams; the number of tablets is three times that of the standard formula. h.1.2 The weight of the light black and rubber is accurate to 1g + the weight of the thiourea accelerator is accurate to 4.02 g, and the weight of the zinc oxide and stearic acid salt is accurate to n.1 g.
5.2 Mixing requirements
6.2.1 The mixed rubber material is wrapped on the energy roller, and 3/4 of the width of the wrapped rubber is taken. When the accumulated rubber on roller 1 has completely drained through the mixing gap, the rubber material under the mixing roller is moved to the left side of the roller or stored in the mixing roller, and the force is alternately applied from both ends of the roller once a month. The interval between each cut is 20. 6.2.2 When there is powder on the mixed rubber material, the standard cutting knife is raised. If the distance of the mixed material exceeds 180.9~18, the material with the standard roller is discarded. 6.2.4 The mixed rubber material should be placed on a clean metal surface for 1-2 hours to cool to room temperature. After cooling, the rubber material should be wrapped with aluminum pins or other materials to prevent contamination.
6.3 Resume
6-3. 1 Adjust the mixing mill roll distance to 1. 4 mm. Temperature control (70: 5)℃6.3.2 Shenzhen natural lemon glue makes this package 1 front roller + left month twice for 2 min6.3.3 Adjust the distance to [.65mm, condense fatty acid, make small-time for 2.5min. 6.3.4 Add sulfur, accelerator and zinc oxide, cut knife twice for 2min6.3.5 Add full carbon, cut knife twice, then adjust the distance to 1.9, mix all the scattered and receiving carbon black in the material tray, cut knife times, add 7. min.
6. 3. 6 Adjust the roller distance to 0. 8 mm, pass the rolled rubber material vertically through the silver mouse six times, add 2 mi. Long use Ziming,
11A1M1319206 plan electro-refining to four times the standard formula, GHT 3780. 18 1998
6.3.7 Adjust the thickness of the rubber sheet to not less than 6mm, and adjust the rubber material according to the test time, which is 3min. The total time for the above operation is min,
6.3.8 Check the weight of the rubber material according to 6.2.3 and record it. 6.3.9 Adjust the thickness of the rubber sheet to about 2.2mm. Cool it on a flat, dry and clean shoe surface and keep it cool. 6.3.10 After cooling, place the rubber sheet at (23±3) 12.7 Preparation and test of vulcanized rubber test pieces
7.1 Cut the rubber sheet (6.3.10) into a length and width less than the vulcanization mold. The test pieces of each mtm of the vulcanizing machine are marked with the indicated direction. Each piece of the vulcanizing machine is (34 three 1)g
7.2 Adjust the temperature of the vulcanizing machine (4,2) plate to (!45±1>7.3 Leave the mold (4.3) and the plate (4.2.2) in place. After preheating for 20 mir, quickly install the mold for vulcanization. 7.4 After installing the mold, when the mold pressure reaches the requirement (4.2.1>, start timing immediately. The allowable deviation of the vulcanization time is 205. 7.5 The vulcanization time shall be carried out in accordance with the provisions of GH3778, that is, the natural gas tank method carbon black vulcanization time is 501nin.H. The vulcanization time of all other types of carbon black is 30 tnit
7.6 The vulcanized test piece shall be parked at 23±3) for 1~6h. 7.7 The tensile properties shall be determined in accordance with GB/T528. The cutter number shall be the T-type cutter specified in GB/T5281. 8.1 Resilience The difference between the results of the two tests in one laboratory shall not exceed 0.96MPa, the tensile strength shall not exceed 1.65MPa, and the elongation shall not exceed 28%. 8.2 Synergy The difference between the results of the two tests in different experimental cases shall not exceed 1.12MF and the tensile strength shall not exceed 2.14MPn: The elongation shall not exceed 179Test report
The test report shall include the following contents:
a) Name and number of specimen
6) Name or continuation of the standard on which the test is based: Laboratory temperature:
d) Test results
1:) Tester:Www.bzxZ.net
{) Test date:
}) Relevant instructions for the test.
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