- Time of issue:2017-05-12 00:00:00
Currently, Guanlian has more than 120 sets of various testing equipment, which basically cover all aspects of raw material analysis and finished rubber compound testing. The testing categories cover mechanical properties, electrical properties, aging properties (thermal aging, ozone aging, weathering aging, fatigue aging), dielectric properties, low temperature properties, flame retardant properties, environmental properties, processing properties, etc., which can provide a more comprehensive characterization of rubber materials, accelerate the development cycle and ensure product quality.
Application: Used to analyze the flow features of rubber materials under certain processing conditions. The molding process from extrusion to die can be simulated. By selecting two different dies, the filling performance and extrusion appearance of rubber compound can be compared. In addition, the extrusion conditions under different shear viscosities can be simulated to guide the setting of injection and extrusion processing parameters, so as to help better develop rubber formula.
It can be used to test the dynamic and static stiffness of rubber materials and rubber damping, which can be used to simulate the deformation and heat generation performance of rubber materials in use. The sensitive and accurate performance of the characterization is much better than that of the commonly used hardness characterization at present, which can greatly reduce the generation of defective products at customers and reduce the testing frequency of customer.
Application: Sulfur analyzer is the most commonly used and accurate method to measure the positive vulcanization time at present. It mainly measures the change of torque of rubber compound in a certain amplitude with the increase of crosslinking degree during vulcanization. It is one of the most important technological processes in vulcanized rubber processing, and it is the process of transforming rubber linear macromolecules into solid network structure. Vulcanization is a process in which the vulcanizing agent in the rubber compound reacts with rubber macromolecules under the combined effect of a certain temperature, pressure and time, and the rubber macromolecules are crosslinked. If the time is too short, it is easy to cause sulfur deficiency, and the performance of rubber compound can not reach the best. If the time is too long, the rubber molecular chain or vulcanization cross-linking bond will be cracked, resulting in over-sulfur, which will also reduce the properties of rubber compound. Therefore, it is very important to determine the time (i.e., the process positive vulcanization time) when the properties of rubber compound reach the best.
Application: Mooney viscometer is used to measure Mooney viscosity of raw rubber and rubber compound. Mooney viscosity is one of the important indexes to measure and evaluate the processability of rubber. The Mooney viscosity of rubber is closely related to its plasticity. High viscosity indicates that rubber has high molecular weight and poor plasticity; On the contrary, it means that rubber has low molecular weight and good plasticity. Reasonable control of Mooney viscosity of rubber is beneficial to the processing technology of rubber such as mixing, calendering, extrusion, injection and mold vulcanization. Therefore, vulcanized rubber can obtain good physical and mechanical properties.
X-ray fluorescence spectrometer:
Application: X-ray fluorescence spectrometer can measure the element content according to the characteristic X-ray intensity of each element. It is suitable for the analysis of most elements (analysis range S-U), and can analyze solid, powder, molten beads, liquid and other samples. Currently, our company is mainly used for R. The rough test of heavy metals (Hg, As, Pb, Cr, Cd) and the test of halogen (CI, Br) content in the S directive can be nondestructive.
Static nitrogen adsorption instrument:
Application: Static nitrogen adsorption instrument is mainly used for the analysis and determination of specific surface area and pore size distribution of ultrafine powder, nano-materials, granular and fibrous materials.
Laser particle size analyzer:
Application: Laser particle size analyzer is used to measure the particle size and particle size distribution of the most solid powder and emulsion particles (talcum powder, diatomite, kaolin, graphite, wollastonite, mica powder, coatings, dyes, fluorescent powder, ceramic raw materials, various emulsions, etc.).
Application: Gas chromatography is a column chromatographic separation analysis method with gas as the mobile phase. Gas chromatography can be applied to the analysis of gas samples, as well as the analysis of liquids and solids that are volatile or can be converted into volatile substances. It can be used to analyze both organic and inorganic substances. Generally speaking, as long as the boiling point is below S000C, the thermal stability is good, and the relative molecular weight is below 400, gas chromatography can be used in principle. Meanwhile, because the gas chromatograph uses a high-sensitivity detector, it can detect the impurities in the substance with the maximum of 10-11-10-129, and it is an effective test tool for trace analysis. Currently, our company is mainly used for purity analysis of antioxidants (3100, 4010NA, 4020, etc.) and plasticizers (DOP, 005, etc.).
Application: Ultraviolet spectrophotometer is also widely used in rubber industry. Especially the analysis of antioxidants and accelerators in rubber organic additives. Pure compounds can be identified by comparison with known ultraviolet absorption spectra. For example, the identification of raw materials, the identification of frosting on the surface of rubber products, and the identification of separated components after the extraction of rubber products is separated and purified. In addition, the ultraviolet spectrophotometer can also be used for the identification and analysis of process filling oil, the determination of iodine absorption of carbon black, the identification of carbon black types, the identification of rubber types, the content of styrene in styrene-butadiene rubber, etc.
Gas chromatography - Mass spectrometer (GC-MS):
Application: GC-MS combines GC with MS, which can make the best use of each other's strengths and avoid their weaknesses. It not only makes up for the shortcoming that GC is difficult to make reliable qualitative identification of unknown components in complex compounds only by retention time, but also uses MS with strong discrimination ability and high sensitivity as a detector. With its high resolution, high sensitivity and simple and rapid analysis process, GC-MS plays an increasingly important role in the fields of environmental protection, medicine, pesticides and stimulants, and is one of the most powerful tools for separating and detecting complex compounds. Currently, we mainly use it for the detection of o-benzene and polycyclic aromatic hydrocarbons.
Atomic absorption spectrophotometer:
Application: The basic task of atomic absorption spectrophotometry is quantitative analysis of inorganic elements. Atomic absorption spectrophotometer features high sensitivity, good specific effect, strong anti-interference ability, good stability and wide application range, and can measure more than 70 kinds of metal elements. Its applications in rubber industry analysis mainly include: Determination of zinc content in vulcanized rubber, inorganic elements (such as lead, calcium, iron, sodium, etc.) in synthetic rubber, indirect determination of chlorine content in polyethylene, determination of coating thickness of steel cord and copper-zinc ratio, determination of metal elements in air pollutants, etc.