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Rubber and Plastic Test


What should pay attention to when using the salt spray test machine?

1. The salt mist must be discharged outside and led to the outdoors. It is best not to discharge into the sewer. There is generally water in the sewer, which affects the discharge of salt spray.2. Before each experiment, the operator must be called to check whether the sensor rubber plug is loose. The sensor rubber plug must remain tightly plugged.3. The water in the saturated bucket is replaced once a month.4. The test chamber is cleaned once a week, and the water in the brine bucket is drained. If there is rust, it can be cleaned with high-activity cleaning agent.5. After test is completed, the residual oil and water in the oil-water separator must be drained. More information about Salt Spray Test Machine,please contact us.https://www.hudatest.com/pid18322164/120L-Salt-Spray-Test-Cabinet-Salt-Fog-Test-Machine-For-Metallic-Coating-Paint-Testing.htmhud05@hudatest.com Huda is a leading manufacturer & supplier of climatic test chambers, tensile test machines,battery test machines,plastic test machines,etc.https://www.hudatest.com/products-list.htm

What is the the influence of temperature and humidity on electronic products?

The influence of temperature and humidity on electronic productsHigh temperature environment: When the ambient temperature rises by 10°C, the life of the electronic product will be reduced by half; when the ambient temperature rises by 20°C, the life of the electronic product will be reduced to a quarter. High temperature also causes aging, oxidation, vaporization, physical deformation, etc.Low temperature environment: It will cause product embrittlement, icing, reduction of mechanical strength, physical shrinkage, etc.Humidity and water vapor: Many materials swell and deteriorate after absorbing moisture, decrease material strength and mechanical properties. Insulating materials that absorb moisture will not only cause electrical performance degradation, but also cause failures under certain conditions . Humidity also causes corrosion, diffusion, hydrolysis, mold, etc. So temperature and humidity testing is very important for electronic products.                    Huda focus on temperature and humidity test chamber with 17+ years and aims to develop agency to serve for our customers all over the world.                   If you are in electronic products field or have interests in this test chamber, please contact us for more details. hud05@hudatest.com

What is different applications between 3 kinds of vibration test machine?

The different applications between High-frequency vibration table & Electromagnetic vibrating table & Simulated transportation vibration table1. High-frequency vibration table: it suitable for aerospace, automotive parts, LEB optoelectronics, semiconductors, plastics and other colleges and universities and scientific research units.2. Electromagnetic vibrating table: it is suitable for testing the structural hardness of semi-finished products or finished samples, and screening out defective products in advance through the vibration test of the electromagnetic vibrating table.3. Simulated transportation vibration table: it suitable for testing the packaged products to be transported, and test the protection of the packaging on the product during transportation.Huda has high quality vibration tables and can provide customized services,if any interests,please contact us.hud05@hudatest.com High-frequency vibration table Electromagnetic vibrating table Simulated transportation vibration table

What is Rubber Vulcanization and Rubber Rheometer?

Rubber vulcanization is one of the main processes in the processing of rubber products, and it is also the last process in the production of rubber products. There are 3 stages of vulcanization:1 Induction. In this stage, the sulfur molecule and the accelerator system react to form an intermediate compound with greater activity. 2 Cross-linking reaction. Further initiating the rubber molecular chain, forming a chain reaction between cross-linkable free radicals (or ions) and the rubber molecular chain, forming a cross-linked chain. 3 Network formation. In this stage, the early cross-linking reaction has tended to be completed, and the resulting cross-linked chains undergo reactions such as rearrangement and cleavage. In the later stage of this stage, the cross-linking reaction has basically stopped. What happens is the cross-linked chain rearrangement and thermal cracking reactions, and finally a vulcanizate with a stable network structure is obtained. Rubber Rheometer test the curve of the crosslinking speed of the rubber compound at the vulcanization temperature with time, so as to determine the best vulcanization point of the rubber formula and select the reasonable vulcanization conditions. HUD-R811 Rubber Rheometer complies with the requirements of GB/T16584-1999 and ISO6502-1999. It provides accurate data for the optimal rubber formula combination, and can accurately measure the scorch time, parameters such as positive vulcanization time, vulcanization index and maximum and minimum torque. HUD-R811 Rubber Rheometer https://www.hudatest.com/pid18307095/Moving-Die-Rheometer-china-Rubber-and-Plastic-Testing-manufacturer-huda.htmIf any question about Rubber Rheometer,please contact us.hud05@hudatest.com

Six Testing For Toxic And Hazardous Substances

1. VOC (Volatile Organic Compound)Including: cyclohexanone, isophorone, methanol, ethanol, phenol, acetone, ethyl acetate, benzene, n-butanol, methyl isobutyl ketone, n-butyl acetate, xylene (ortho, m, p ), toluene, styrene, 1,2-dichlorobenzene, acetophenone, methyl ethyl ketone, isopropanol, dichloromethane, trichloroethylene, ethylbenzene, n-hexane, 2-methoxyethyl acetate 2. RoHSIncluding: lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls PBBs, polybrominated diphenyl ethers PBDEs; 3. REACH regulations (specially SVHC test) 4. Polycyclic aromatic hydrocarbons (PAHs)Including: acenaphthylene, acenaphthylene, anthracene, benzo(a)anthracene, benzo(b)fluoranthene, benzo(j)fluoranthene, benzo(k)fluoranthene, benzo(ghi)perylene (dinaphthalene) Perylene), benzo(a) pyrene, benzo(b) pyrene, benzo(a, n) anthracene, fluoranthene, fluorene, indene benzene (1,2,3-cd) pyrene, naphthalene, Phenanthrene, pyrene; 5. Ortho-benzene (6P, 16P, 22P) plasticizer6P : Diisononyl Phthalate (DINP), Di-n-octyl Phthalate (DNOP), Diisodecyl Phthalate (DIDP), phthalate Bis-(2-ethylhexyl) Phthalate (DEHP), Dibutyl Phthalate (DBP), Benzylbutyl Phthalate (BBP) 6. AsbestosIncluding: asbestos content in the air, asbestos content in materials, asbestos content in mixed substances, asbestos testing in other fields, etc.

What Are The Melt Mass-Flow Rate And Melt Volume-Flow Rate? How To Test?

Melt mass-flow rate is the mass of molten plastic passing through a standard die under the action of a piston under a certain load at a certain time and temperature. The result is converted to the extruded mass of plastic every 10 minutes, the unit is g/10min. Melt volume-flow rate is the volume of molten plastic passing through a standard die under a certain load and a certain position of the piston at a certain temperature, and the result is converted into extruded plastic volume every 10 minutes, the unit cm3/10min. HUD-R803 Melt Flow Tester is used to test the volume flow rate and mass flow rate of thermoplastic melts. Use automatic sampling and balance weighing; then calculate the flow rate according to the formula. The measurement results are displayed on the LCD screen and output by a micro printer.It is suitable for engineering plastics such as fluoroplastics and nylon, as well as polyethylene (PE), polypropylene (PP), polyoxymethylene (POM), and polyphenylene. Ethylene (PS) ABS resin, polycarbonate and other plastics with low melting temperature. It is widely used in plastic products, petrochemical industries, related universities, research institutes, and commodity inspection departments. More information,please click :https://www.hudatest.com/pid18328664/Plastic-Melt-Flow-Index-Tester.htm Any questions about this,please feel free to contact us.Nicole hud05@hudatest.com

How Many Salt Spray Tests Are There?

The salt spray tester simulates salt spray environment to assess the corrosion resistance of products or metal materials. The salt spray test is divided into two kinds, one is the natural environment exposure test, and the other is the artificial accelerated simulated salt spray test. There are 4 kinds of salt spray tests:(1) NSS testThe neutral salt spray test (NSS test) is one of the earliest accelerated corrosion test methods with the widest application field. It uses 5% sodium chloride salt aqueous solution, the pH value of the solution is adjusted in the neutral range (6-7) as the spray solution. The test temperature is 35℃, and the sedimentation rate of the salt spray is required to be between 1~2ml/80cm².h.(2) ASS testThe acetic acid salt spray test (ASS test) is developed on the basis of the neutral salt spray test. It is to add some glacial acetic acid to 5% sodium chloride solution to make the pH value of the solution drop to about 3, the solution becomes acidic, and the salt mist formed finally turns from neutral salt mist to acid. Its corrosion rate is about 3 times faster than the NSS test.(3) CASS testCopper salt accelerated acetic acid salt spray test (CASS test) is a kind of rapid salt spray corrosion test recently developed abroad. The test temperature is 50℃, and a small amount of copper salt—copper chloride is added to the salt solution to strongly induce corrosion. Its corrosion rate is approximately 8 times faster than the NSS test. (4) Alternating salt spray testThe alternating salt spray test is a comprehensive salt spray test, which is actually a neutral salt spray test plus a constant damp heat test. It is mainly used for cavity-type complete products. Through the penetration of the wet environment, the salt spray corrosion is not only generated on the surface of the product, but also inside the product. It is to alternately switch the product under two environmental conditions of salt spray and damp heat, and finally check whether the electrical and mechanical properties of the whole product have changed.More informations about salt spray tester,please contact us. Links:https://www.hudatest.com/pid18091475/90L-Salt-Spray-Testing-Machine-Salt-Spray-Corrosion-Test-Chamber-For-Metallic-Coating-Paint-Testing.htm

Why And How To Defrost The Constant Temperature And Humidity Test Chamber?

When testing, the constant temperature and humidity test chamber may need to be defrosted.What is the defrost? How to defrost the constant temperature and humidity test chamber? Why is it necessary to defrost during testing?The defrosting of the constant temperature and humidity test machine is mainly that the water in the air is cooled and changed into crystals, which become a kind of small ice crystals. The constant temperature and humidity test machine defrosts the frost mainly on the energy storage components in the pre-cooling zone.The constant temperature and humidity test chamber mainly exchanges heat through the mutual conversion of the airflow in the three complementary boxes. Moreover, the air in the three boxes is isolated from the air outside the box. Since these three boxes are closed, the moisture in the box is quantitative. From a theoretical point of view, it is impossible to add some moisture out of thin air to form frost. Then where does this extra moisture form? It is not difficult to know where the moisture comes from. During the test, the user opens the cabinet door of the constant temperature and humidity testing machine, and the moisture in the air enters the cabinet. Therefore, it is not allowed to open the door of the chamber when the constant temperature and humidity testing machine is testing. It will not only increase the cream, but also the authenticity of the test data, and may also cause unnecessary failures.If any questions about constant temperature and humidity test chamber,please feel free to contact us to know more! Huda technology is always there for you.

How To Built & Design a Testing Laboratory For Battery?Which Machines We Need?

Generally, a battery testing laboratory with complete testing capabilities can be planned into the following functional partitions:  1) Electrical performance testing area. The instruments in this area are mainly charge and discharge cabinets, internal resistance testers, insulation strength testers, insulation resistance testers, data acquisition equipment, etc.  2) Mechanical performance testing area. The instruments involved in this area include charge and discharge cabinets, vibration test benches, impact and collision test benches, flip test benches, and three comprehensive test benches.  3) Environmental testing area. This area mainly completes temperature, humidity, aging, thermal analysis and other experiments. The equipment involved includes charging and discharging cabinets, high and low temperature chamber, negative pressure chamber, temperature and humidity chamber, thermal analyzers, data acquisition equipment, etc.  .  4) Auxiliary function area, which can be configured according to actual needs, including sample room (place battery samples before and after the test), warehouse (place idle cables, tools, etc.), office, meeting room, rest area, etc.  5) Battery safety testing area. The tests carried out in this area are dangerous, including the risks caused by immature samples and the risks of the test itself, including test items: drop, acupuncture, squeeze, burning, overcharge, overcharge  Projects such as discharge, short circuit, immersion in water, seawater intrusion, high temperature charging and discharging, etc. The equipment involved includes charging and discharging cabinets, drop test benches, acupuncture testers, extrusion testers, combustion testers, short circuit testers, soaking equipment, and temperature & humidity chamber and so on.If any question about Battery test machines,please contact us to know. We could provide professional solutions for you. 

Large Deviations & Uniformity In Temperature Of The Constant Temperature And Humidity Test Chamber?

1. The structure of the constant temperature and humidity test chamber greatly affects the uniformity of the temperature in the working process. Because the structure is difficult to be completely symmetrical, it will adversely affect the uniformity of the temperature. Commonly used low temperature test box or constant temperature and humidity test box structure has the door in the front, the air-conditioning room is at the back of the box, and the upper air is supplied and the lower air is returned. 2. There must be test samples in the constant temperature and humidity test box during the test. If the test sample is too large or placed in an improper manner, the air convection will be blocked and the temperature uniformity will be deviated. 3. Because the heat transfer coefficients of the six sides of the front, back, left, and right sides of the chamber of the studio are different, the design of small details such as threading holes, inspection holes, and test holes will cause local heat dissipation and heat transfer, which makes the equipment box There is uneven temperature, and the convective heat transfer of the box wall radiation will also be uneven, which affects the uniform temperature. 4. Design problems make it difficult to achieve a uniform symmetrical structure in the internal structure and space design of the test box. The asymmetric structure of the temperature and humidity test box will inevitably lead to deviations in the internal temperature uniformity. This level is mainly reflected In terms of sheet metal design and its treatment, such as the design of the air duct, the placement of the heating tube, the size of the fan power and other reasons. If any questions about constant temperature and humidity test chamber,please feel free to contact us to know more! Huda technology is always there for you.

The Difference Between The Three Zone And The Two Zone Thermal Shock Test Chamber

The thermal shock test chamber is used to test the impact of the product from a high temperature to a low temperature environment, and the degree to which it can withstand an extremely high temperature and an extremely low temperature continuous environment in an instant. Three zone thermal shock test chamber It can meet two tests of three tanks (high temperature, room temperature, low temperature) and two tanks (high temperature and low temperature), and the test sample is static when be testing. Two zone thermal shock test chamber It only have two tanks (high temperature and low temperature). It test product moves between the high and low temperature tanks with the basket (test tank). If any questions about Thermal shock test chamber,please feel free to contact us to know more! Huda technology is always there for you.

What To Do When The Constant Temperature And Humidity Chamber Can Not Cooling During Operation?

1. The temperature cannot be maintained. Observe whether the refrigeration compressor can be started. If it can be started, it means that the electrical wiring from the main power supply to the compressor is normal, and there is no problem with the electrical system.2. Check whether the compressor is abnormal. If there is an abnormal sound (excessive sound) and suddenly stop the action, it may be that the compressor is stuck.3. Touching the exhaust and suction pipes of the compressor of the main unit by hand, it is found that the temperature of the exhaust pipe is not high, and the temperature of the suction pipe is not low, which also shows the lack of refrigerant in the main unit.4. Check the refrigeration system. First, check that the discharge and pressure of the low-temperature compressors of the two refrigeration groups are lower than the normal values, and the suction pressure is in an evacuated state, indicating that the refrigerant quantity of the main refrigeration unit is insufficient.5. When the machine is operating normally, but the temperature does not drop, the refrigeration system should be checked for leaks, and the leak detector and soapy water should be used to check. It is found that the valve stem of a hot gas bypass solenoid valve is cracked and replaced. Solenoid valve, refill with fluorine, re-adjust and it will be OK.If any questions about the Constant Temperature And Humidity Chamber,please feel free to contact us to know more!Huda technology is always there for you.

What Are The Effects Of The Ozone Aging Test Chamber On Rubber?

Ozone aging test chamber simulate environment to accelerate the process of rubber aging by ozone because rubber is sensitive to ozone. Ozone mainly exists in the ozone layer below the stratosphere in the atmosphere (20 kilometers away from the surface), but there is also rare ozone in the surface atmosphere. Because of the sensitive nature of rubber materials to ozone, even thin ozone will cause cracks in all rubber products. This is due to the fact that ozone reacts with unsaturated rubber and produces a bimolecular reaction with the double bond in the rubber, and the reaction speed is very fast. The aging reaction of ozone to unsaturated rubber is carried out on the exposed surface of the rubber. After the double bonds on the surface are digested, the ozone reacts with the unsaturated bonds inside the sample.The stretched unsaturated rubber exposed to ozone first forms ozone cracks on the surface, and then the cracks grow larger and then break. There are two views on the mechanism of rubber cracking: molecular chain breaking and surface layer destruction. In the case of a certain ozone concentration, if the mobility of the molecular chain is high, when the ozone breaks the surface molecular chain, the two ends of the break will separate from each other at a faster speed, exposing the new molecular chain at the bottom layer to continue to be attacked by ozone. Speed up the gap growth.The cracking time of various rubbers is shortened with the increase of ozone concentration, and different rubbers have different degrees. Under the same ozone concentration, different cracks in the rubber structure grow at different speeds. Due to the different structures of NR and SBR, BR and NBR, the ozone aging characteristics are also different. Elongated NR produces cracks in a short time in the ozone environment, but the growth rate of the cracks is slow, and the number of cracks is large and shallow.If any questions about Ozone aging test chamber,please feel free to contact us to know more!Huda technology is always there for you./aboutus.htm

Three Ways To Calibrate The Constant Temperature And Humidity Test Chamber?

The constant temperature and humidity test chamber is used to test the parameters and performance of electronic and other products after the temperature and humidity changes.In order to better exert the effect of the constant temperature and humidity test chamber, it is important to debug and calibrate the chamber for 10-15 days before leaving the factory. The following are the 3 methods for calibration of the constant temperature and humidity test chamber and their advantages and disadvantages. 1. Calibrate under load conditionsAdvantages: It can more accurately evaluate the impact of the test sample on the performance of the test chamber, and it is easy to get the detailed information of the environmental test of the key components or parts of the test sample.Disadvantages: When the test sample is replaced, it needs to be re-calibrated.2. Calibrate under no-load conditionsAdvantages: The entire working area of the programmable constant temperature and humidity test box has been calibrated, and the applicability of the test box can be effectively evaluated.Disadvantages: The influence of the test sample on the test chamber cannot be evaluated.3. Real-time measurement during useAdvantages: not only has the advantages of the above-mentioned method. In addition, it is possible to obtain comprehensive environmental parameters of the test sample in the environmental process, which is often used in the test of products with high environmental requirements.Disadvantages: All environmental tests need measuring equipment, and the calibration method under no-load conditions is usually used when the test chamber is calibrated.If any questions about constant temperature and humidity chamber,please feel free to contact us to know more!Huda technology is always there for you./aboutus.htm