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Anonymous users2024-02-06Add black charcoal to make anti-static nitrile raw materials, black and white eye-fixing rubber mainly depends on the needs of customers, mainly the function and ** is a little different.
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Anonymous users2024-02-05The easiest way to do this is to pass the gas through water.
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Anonymous users2024-02-04Rubber Formulations, ASTM D3189-99
Ingredient PHR (i.e., the number of parts added to every 100 parts by mass) of rubber (or resin)).
Butadiene rubber. Zinc oxide amino carbon black N774
Carbon Black N550
Plasticizer SC
Rubber plasticizers.
Zinc monomercaptolumizole.
Dibenzylthiazole stearate disulfide.
Rubber accelerator.
Vulcanizing agent (should be sulfasan r).
Total vulcanization data, ASTM D 3182-94
Vulcanization time of the test piece is 12 minutes.
Vulcanization temperature, 320 Fahrenheit
Compression set button.
Vulcanization time: 20 minutes.
Vulcanization temperature, 320 Fahrenheit
Millifiber Wear, ASTM D 2228-88(01), D 792-98
Load kg at 1 Hz, total rotation 80 at 1 Hz
Standard Index:
Specific gravity millifiber index 81
Rheometer Data, ASTM D 2084-94
tech pro rheo tech raw data.
Fahrenheit 320 degrees, 3 o arc, 50 inches lbs (torque conversion range) 30 minutes drawing recording speed, 100 minutes.
Maximum torque, mh, inches-pounds.
Minimum torque, ml, inches-pounds.
Scorch time, ts2, min.
Vulcanization time, t50 min.
Vulcanization time, t90, min.
Original Physical Properties, ASTM D 412-98A & D 2240-01
Die C specimen tested @ 20 inch minute
100% modulus, PSL 286
200% modulus, PSL 739
300% modulus, PSL 1261
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Anonymous users2024-02-03Formula design is to reasonably select raw materials according to the performance requirements and process conditions of the product, and determine the dosage and proportion relationship of various raw materials. Rubber material is a multiphase system composed of raw rubber and a variety of compounding agents, and there are complex physical and chemical interactions between various components in rubber materials. At present, it is not possible to determine the ratio of various raw materials by theoretical calculations, nor can the quantitative relationship between formula and physical properties be accurately deduced.
To a certain extent, it still relies on long-term accumulated experience.
Tools Raw materials.
Rubber, activators, accelerators, vulcanizing agents, antioxidants, fillers, plasticizers, reinforcing agents, etc.
Internal mixer, open mill, vulcanizing machine, rubber physical and chemical performance testing machine, etc.
Method steps.
According to the existing conditions such as sample trial requirements and physical and chemical indicators, the rubber varieties are inferred, and the corresponding test formula is designed according to the experience of engineers.
List the formula, accurately weigh the weight of various small materials, and put them into different containers for mixing and trial according to the process conditions.
According to the requirements of the process conditions, the feeding sequence, temperature and test of the mixing and training are operated in strict accordance with the requirements of the engineer's design formula, and are to be used for parking and vulcanization.
Vulcanization: time, temperature, pressure. The three elements should be well controlled, and the correct vulcanization should be carried out according to the design requirements, and the physical and chemical properties to be tested should be parked.
The test piece is designed by the test formula to detect whether the data to be given meets the requirements of the existing finished product and the physical and chemical properties.
A formula that is qualified until all physical properties are satisfied, in the meantime the engineer may redesign several formulations until the sample requirements are met.
end precautions.
Pay full attention to this interaction, and consider its role and impact as thoughtfully as possible when designing the trial, and even treat it as a factor. Avoid the large factors of interaction, and arrange a pair of factors with large interaction in different groups of experiments, so that the factors of the same group of experiments maintain relative independence, avoid the interference of strong interaction, and make data analysis simple and easy.
1.The design formula should be comprehensively examined and filtered in multiple aspects,1Ensure the specified physical properties.
The so-called physical properties are generally in the following aspects: tensile strength, tear strength, tensile stress, hardness, abrasion, fatigue and fatigue failure, resilience, elongation at break, etc. 2.In the process of rubber processing, the performance is excellent, which ensures high yield and material saving.
3 Low cost** Cheap. 4.The raw materials used are easily sourced.
5.High productivity, easy processing, and low energy consumption in the manufacturing process. 6.
Meet environmental protection and health and safety requirements.
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