Method for testing the porosity of rubber
A porosity, rubber technology, applied in measurement devices, permeability/surface area analysis, suspension and porous material analysis, etc., can solve problems such as the inability to meet the requirements of mass production activities, achieve a wide range of testing, low equipment investment, and operation. simple effect
Active Publication Date: 2022-05-31
特拓(青岛)轮胎技术有限公司
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Problems solved by technology
[0003] Aiming at the above-mentioned problem that the existing method for testing the porosity of rubber cannot meet the requirements of mass production activities, the present invention aims to provide a method for testing the porosity of rubber. Standard solution, pour the prepared solution into a standard container, then put the dried rubber material into the solution, and directly judge whether the porosity is qualified according to the actual rubber material's rising, suspending, and falling states
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[0038] 1. Sample
[0039]Formulation system: natural rubber 15phr, cis-butadiene rubber 15phr, styrene-butadiene rubber 70phr, oil 32phr, filler 80phr, other (vulcanizing agent, accelerator, coupling agent, active agent) 10phr
[0040] Theoretical specific gravity: 1.175.
[0041] The area of the sample collected on site is about 10mm*10mm, and the height is about 4-6mm. Through the comparison test, the best specific gravity for porosity control is: 1.170.
[0042] 2. Preparation of standard solution
[0043] According to Archimedes' principle, prepare a series of standard solutions whose specific gravity is ρ = 1.170; the specific calculation formula is as follows:
[0044]
[0045] where V 水 =1000ml,m 水 =1000g,ρ 样 = 1.170, which gives m NaCL = 170 g.
[0046] 3. Standard solution correction
[0047] 1) Take 480ml of solution and transfer it into a 500ml beaker;
[0048] 2) Use tweezers to slowly put the measuring rubber into the center of the solution, i.e. the...
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Abstract
The invention belongs to the technical field of porosity detection of rubber materials, and in particular relates to a method for testing the porosity of rubber. Aiming at the problem that the existing method for testing the porosity of rubber cannot meet the requirements of mass production activities, a method for testing the porosity of rubber is provided. This method prepares a standard solution of corresponding density according to the control standard of rubber porosity. Pour the good solution into a standard container, then put the dried rubber material into the solution, and directly judge whether the porosity is qualified according to the actual rubber material's rising, suspending, and falling states. The test method is convenient and fast, and it is not necessary to record the actual specific gravity and other data in detail to determine whether the porosity of the rubber material meets the standard requirements. It has the characteristics of good accuracy, low cost and high efficiency.
Description
technical field [0001] The invention belongs to the technical field of rubber porosity detection, in particular to a method for testing the porosity of rubber. Background technique [0002] The importance of rubber porosity control has been clearly discussed in related professional papers, mainly including the following two points: if there are pores in the rubber compound before vulcanization, the compactness of the rubber compound will be reduced, thereby indirectly affecting the processing performance of the rubber compound; If there are pores in the compound after vulcanization, it will directly affect the physical properties of the compound. Therefore, regardless of vulcanized rubber or unvulcanized rubber, its porosity control is particularly important. In production activities, people hope to use less cost, faster and more accurate detection of whether the porosity meets the requirements. At present, the methods for testing the porosity of rubber mainly include: (1)...
Claims
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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 李红卫陈松袁金琪顾培霜
Owner 特拓(青岛)轮胎技术有限公司