Experiment & Standing water drop
Water repellency or waterproofing has always been synonymous with high quality in textiles. The water repellent effect refers to the fact that the material's surface will poke off external water or temporarily stay on the material's surface. If there is enough time and pressure, the water will still slowly seep into the material. As the name implies, the waterproof effect is that it can completely block water and prevent water from penetrating the inner layer of the material. Cloth fabrics in daily life often emphasize the water repellent effect, and the secret is closely related to the size of the pores of the fabric. Increase the density of the fabric, reduce the pores of the fabric structure as much as possible, and match it with a water repellent or plugging agent to achieve the waterproof function. If the fabric density of the cloth is not high, the cloth will be soaked in a hydrophobic treatment agent (water repellent) to form a water repellent protective film on the surface of the cloth. This kind of protective layer is time-effective. As the number of washing increases, the protective layer will gradually peel off. Therefore, the durability of the protective layer is also the focus of research and development. Figure 1 shows the cloth fabric that has not been hydrophobically treated. Water drops on the surface immediately wet the cloth. Soak the fabric in NF206 environmentally friendly water repellent treatment agent, and then dry it at 80°C. The molecules of the treatment agent will produce a cross-linked structure to form a durable protective film. Figure 2 shows that water droplets stand on the fabric and will not wet the fabric. They have been applied to the upper of sports shoes.
─Author: Mr. Rong-xin, Lin
Activity § Current status of the drug room
The factories that produce paints, adhesives, cosmetics, etc., are all secondary processing factories: most raw materials are purchased out and focus on formula research and development. Everwide Chemical is no exception. From this perspective, the source, type, quantity, and information of the raw materials are the lifeblood of the formulation factory. We have spent a lot of effort collecting raw materials everywhere, such as domestic and foreign exhibitions, websites, books, newspapers and magazines, raw material agents, etc., are our channels. We divided the obtained samples into 25 categories and placed them in 2 medicine rooms. There are currently 150 medicine cabinets (Figure 1). Each sample is our treasure, and our dedicated colleagues bother to organize it (Figure 2): from the storage packaging, internal labels (Figure 3), network file creation, sample data (Figure 4), and even the establishment of the spectrum, etc. has been accumulated for several years. A complete drug warehouse can allow R&D colleagues to conduct experiments more efficiently and be used as the cornerstone of knowledge exchange. There are now 5,874 samples in the drug warehouse (Figure 5). In 2013, there were a total of 1,690 lent records. All of these are sufficient to illustrate our efforts, and we must continue to make progress.
Knowledge § What is the rationale of UV + Anaerobic (Hypoxic) glue reaction?
Acrylic resins can undergo chain polymerization in the presence of free radicals. The source of free radicals can be generated by using a photoinitiator to absorb specific light or can be obtained by using a thermal initiator (peroxide) to decompose by temperature. The so-called UV + anaerobic glue reaction is the addition of a thermal initiator to the UV glue. When the metal catalyst appears, and the isolation of oxygen (air) occurs, the free radicals obtained by the decomposition of the thermal initiator will cause The UV glue to undergo a hardening reaction without irradiating light. The metal catalyst is needed because it can lower the temperature at which peroxides decompose. The source may be the surface of the metal substrate or pre-coated primer containing metal components (Primer). The need to isolate oxygen (air) is because oxygen will act together with the inhibitor to consume free radicals generated by peroxides and hinder the progress of the hardening reaction. Therefore, it is necessary to isolate oxygen to be able to carry out the anaerobic hardening reaction. These two elements are indispensable; otherwise, the part not irradiated with UV may not be hardened, causing doubts.
Living § Quitting Smoking is not Difficult
"A cigarette after a meal makes happy like a fairy" is one of the excuses of many addicts. I used to be an old smoker who couldn't quit. However, when I participated in a company's external training course, I had a different understanding of smoking. The teacher said that many people always think about saving, but they can't find a good way. Therefore, we suggest that we start saving with little money and unnecessary expenses, and slowly save a considerable amount of money. Because many people smoke in class, the teacher recommends the best way to "quit smoking"! Assuming that a pack of cigarettes is 70 yuan and one pack a day is calculated, it will cost 21,900 yuan a year and about 110,000 yuan in five years! Save money and buy a second-hand car. Try to think again; a pack of cigarettes is equivalent to the price of a drumstick bento. Why not save money on cigarettes and have a better dinner? So the next day, I bet with my colleagues to see who quit smoking first! It was uncomfortable at first, but occasionally I looked at my colleagues who smoked during the break and hesitated to give up. Later I found a way to overcome it: wash my face every time I want to smoke and do something to ease my cravings. Gradually, the smell of smoke no longer attracted me, and finally, I successfully quit smoking! Many people say that quitting smoking is difficult and that quitting will make you fat, but I think it is not difficult to quit smoking as long as there is determination. After quitting smoking, I feel refreshed, and I didn't get fat. If you are terrified of getting fat, exercising every day can solve this problem. Quitting smoking is not only healthy but also saves money; it kills two birds with one stone! What surprised me was that the company praised me for quitting smoking at the year-end meeting. The red envelope reward (10,000 yuan) made me feel that quitting smoking was right. For your health and purse, quit smoking now! It's not difficult!
─Author: Mr. Yan-Hao, Zhang
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