Experiment § Powder-Free Flame Retarding Epoxy Resin
In the past, epoxy resins are halogenated, usually brominated, to achieve flame retardancy. Due to the toxicity of the fume release during halogenated epoxy combustion, the use of halogen is now globally prohibited. Non-toxic flame retardants, such as phosphorus-containing substances, replaces halogenated flame retardants to offer flame retardancy to epoxy resins. Unlike halogenated flame retardants, epoxy resins with phosphorus flame retardants does not emit toxic fume during combustion. The level of smoke is also low. Combustible free radicals (H∙ and OH∙) is consumed by P-containing radicals (PO∙) in phosphorus-based flame retardants, which cuts the fuel for polymer combustion. The generation of carbonized layer is the key in the UL-94 experiment, the test piece was burned twice by the flame. If the carbonization layer produced by the first combustion is insufficient, combustion may continue the second time. If enough carbonization layer can be generated in the first combustion, it will easily self-extinguish in the second time and show good flame-retardant properties. One application is underfilling electronic parts, and the resin must have good flow properties. Powder-type flame retardants will increase the viscosity and thixotropy, and a pure liquid formula must be used, making the case much more difficult. Our JE313-11 is an epoxy resin/amine curing system that can meet customer needs. The test piece is ignited for the first time (Figure 1, 2) and the second time, and the flame is extinguished immediately after the flame is removed (Figure 3, 4), proven to have good flame retardancy. This product is available in a clear and colorless version. If you are interested, please contact us.
— Author: Mr. Li Xinyu
Activity § Visit from Eindhoven University of Technology
Approximately 30 students from the Chemical Engineering Department of the globally renowned Eindhoven University of Technology in the Netherlands visited our factory. During the visit, our colleagues conducted the entire tour and product presentations in English. Following the presentations, the students enthusiastically asked many questions, and our colleagues answers with their professional knowledge. Although the visit only half a day, the students expressed high appreciation for our factory environment, production processes, technological development, and expertise. This experience not only to show our company's capabilities but also affirmed our colleagues' English proficiency. We will continue to strive for improvement and prepare to welcome more visitors and clients from around the world.
Knowledge § What is hot melt inorganic adhesive?
When exposed to sufficient temperatures, Hot melt inorganic adhesive will melt into liquid and wetting the substrate. Upon cooling, they re-harden to achieve bonding. These materials provide strong adhesion and excellent sealing properties. Solder, a low-melting-point metal, is the most well-known application of this principle. The same concept to develop adhesives for bonding glass and ceramics. Through formulation adjustments, these adhesives can achieve good wettability, a thermal expansion coefficient similar to the substrate, and creep resistance. Additionally, the operating temperature is about 150℃ higher than that of fused glass.
Living § Challenge Junda Mountain
Early in the morning, my companion and I set off from Douliu to begin our mountain climbing. The bumpy roads along the way felt like riding a bumper car and a pirate ship. When we arrived at the JunDa Forest trailhead, our activity officially started (Figure 1). We climbed slowly along the gravel path and first reached the “Wang Hsiang Mountain” at an elevation of 3007 meters, which is the first point. Midway through the trail, there was a unique rock (Figure 2). Due to the cold weather, we could only take a few photos than continuing. As we neared the “JunDa Mountain North Peak,” my legs began to shake uncontrollably, the final mile incredibly grueling and painful. My friends had reached the top of the mountain, I tried my best and finally climbed to the "North Peak of Junda Mountain" with an altitude of 3252 metersand "Junda Mountain" with an altitude of 3,278 meters. Despite my heart arrhythmia issue, I successfully conquered the high mountain. The joy was indescribable. On the way back, the scenery of the arrow bamboo grass slope and the beautiful clouds over the mountains was truly enchanting (Figures 4, 5). I’m grateful for my colleague’s invitation and the encouragement from friends along the way, which help me to complete the challenge safely and successfully. This experience taught me that as long as you persist, anything is possible!
— Author: Mrs. Ye Ling
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