Everwide Newsletter No.124

The fourth department of the R&D department develops high Tg two-component epoxy resin, which can be used in filament winding. Filament winding is as shown in the left picture: the continuous fiber is passed through the impregnation tank and wound on the model mandrel. The mandrel in the picture will rotate clockwise, and the impregnation tank will move left and right. Through computer control, the arrangement of fibers can be complex and diverse, and high-strength products can be designed. This method requires the resin to have a low viscosity in order to control the content of the resin in the composite material. However, this processing method does not allow the use of solvents to reduce viscosity, so adding reactive diluents is the most commonly used method. The use of reactive diluents will greatly reduce the Tg after curing, which will be a limitation for objects used in high-temperature environments, such as robotic arms, high-temperature conveying pipelines, and high-temperature resistant workpieces. The newly developed high Tg resin is designed for the difficulties faced by the filament winding method. The resin has low viscosity in the initial stage of mixing and can work for a long time. The wound composite material can be pre-cured at 100°C/1 hour and then cured at 180°C/2 hours. After curing, the Tg can reach above 180°C. As shown in the DSC chart shown on the right as an example, its Tg is about 193°C, which can meet the application requirements of winding composite materials at high temperatures.

─Author: Ms. Zhen-Ru, Liao

The summer is very hot, and the high temperature often makes everyone unbearable, especially working in a manufacturing unit where air-conditioning cannot be installed. We take some improvement measures every year, such as: setting curtains, installing ceilings, designing airflow direction, and using sweatshirts as uniforms. This year, we set up a sunshade outside the manufacturing department to avoid direct sunlight to the plant, and also lower the temperature of the outside air, so that the room temperature inside the manufacturing department is further reduced. The awning adopts a retractable curtain design to avoid insufficient light when it is cloudy, and avoid damage when it is windy. The surrounding environment will inevitably be damaged during the construction process, such as the beautiful courtyard dug full of holes when erecting the steel structure. Experience the pressure to enjoy the fruits of completion. Perhaps the appearance of the steel structure factory building will be transformed next year? Maybe set up a chiller system? In any case, continuous improvement of the working environment is the goal of our continuous efforts.

The principle of the instant glue is to start the instant glue monomer by a small amount of moisture on the surface of the material, causing the monomer to undergo rapid anionic polymerization reaction and solidify to achieve the purpose of adhesion. In terms of the chemical classification of monomers, there are mainly the following six types: 1. Methyl Cyanoacrylates. 2. Ethyl Cyanoacrylates. 3. Buthyl Cyanoacrylates. 4. Octyl Cyanoacrylates. 5. Ethoxymethyl Cyanoacrylates. 6. Methoxymethyl Cyanoacrylates. As far as the application of instant glue is concerned, it can be divided into the following seven types: 1. General instant glue, various specifications of ethyl. 2. Instant glue for metal adhesion, various specifications of methyl. 3. Use instant glue for inactive surfaces, and use special catalysts to modify ethyl. 4. Rubber toughened instant glue, special rubber modified ethyl. 5. High temperature resistant instant glue, special additives to upgrade ethyl. 6. Low whitening type instant glue, mainly ethoxy group, part of methoxy group; 7. Medical instant glue, soft butyl, and octyl.

Carnegie listed "no criticism, no complaint, no blame" as the first criterion for good interpersonal relationships. This reason is easy to understand, because criticism, complaining, and reproach will only cause resentment, because at best it is a superficial submission, and it has never been able to solve the problem. Most people can't avoid criticism, complaints, and blame, because these are the fastest and cheapest ways for us to vent our emotions. Therefore, many people jokingly said: This principle should be accompanied by the word "impossible". During Carnegie's class, there were still small frictions between our colleagues. I often saw both sides criticizing each other and then accusing each other: Look! In Carnegie's class, you still violated "no criticism, no complaint, no blame." Another colleague told me that if people who work hard have the principle of "no criticism, no complaint, no blame", will they indulge some people? These two things made me think for a long time, after all, my Carnegie experience has just begun. "No criticism, no complaint, no blame" is actually a self-demand, not for examining others. Can others do this principle well? Can we do this principle ourselves? The two are actually not related. In order to make ourselves a better and happier person, of course, we must practice "no criticism, no complaint, no blame." The attitude of "no criticism, no complaint, no blame" is a starting point. When we abandon unnecessary criticism of everything, we can focus our efforts on "what should we do?" Only by thinking about "what to do?" can it be possible to improve the situation. Perhaps we can design a practice question: Facing colleagues whose efficiency needs to be improved, "what should we do?" "No criticism, no complaint, no blame" at first glance is very passive and passive as if it is asking us to shut our mouths up. In fact, it is not like that. Shut up and take action is the most positive way. No wonder, Mr. Carnegie listed the principle of "no criticism, no complaint, no blame" as the starting point for training.

—Author: Mrs. Ming-Xu, Li