Everwide Newsletter No.127

Loudspeakers are commonly known as horns, which are converters that convert electronic signals into sound. They are composed of electromagnets, coils, and speaker membranes. Generally, the coil of the speaker and the horn film are connected by adhesive (as shown in the left picture). Coils and horn films have many different structures and materials (for example paper, plastic, metal), so the required adhesive properties are also different. According to low-power speakers, whether it is one-component or two-component resin, we have mature products that can meet customer needs. As for the special adhesive for high-power speakers, it has been successfully developed recently. The use of speakers will produce heat and vibration, and the changes in temperature and vibration of high-power speakers are particularly obvious. The adhesive must take into account the adhesion strength, heat resistance, and vibration resistance without affecting the sound quality of the speaker, so it is quite challenging in the development process. Next time you put the earphones in your ears, or when you are playing music, don't forget, maybe our adhesive is hiding in the speaker!

——Author： Ms, Zi-Yi, Huang

Up to now, seven colleagues from Everwide Chemistry have participated in the Carnegie Manager Class training this year. The homework of one of the courses is to hold an "innovation meeting" in the company to discuss a certain topic with the company's colleagues. For example: "How to improve the success rate of the business", "How to make the quality control department handle urgent orders more appropriately", "How to make the product distribution in the off-peak season better", "How to make the electronic newspaper publication more smoothly", etc. At the beginning of the conference, participants are encouraged to express their opinions and develop ideas and focus on collecting information to find ideas. This section of the agenda is called "green light time." When everyone's opinions are filled on the whiteboard, they will gradually enter the "red light time" and summarize the feasible directions. High efficiency / easy to implement: Screening cases and tracking returns on a regular basis 、 R&D and business forming a project team、Work out ten major industries to focus on in the next three years. High efficiency / difficulty to implement： Determine case transaction rate and implement follow-up review、 Comprehensive inventory of R&D manpower and working hours、Develop the same-level products in the leading market. Low efficiency / easy to implement: Collect market information and share it internally、Business and R&D personnel should communicate frequently. Low efficiency/difficulty to implement: Share all resources of R&D and business. After conducting the qualification review of the dealer. It is recognized that the green light is easy, but it is really a challenge for the meeting host to enter the red light. We found that different meetings have different methods of organizing information and seeking conclusions: some can be deleted by a show of hands, and some can be designed to summarize the topic. Take the conference "How to Consolidate R&D Advantages to Maximize Marketing Benefits" as an example. During the green light time, everyone put forward 25 opinions. During red light hours, the host invites participants to vote on their opinions one by one, and divide these opinions into "high efficiency/easy to implement", "high efficiency/difficult implementation", "low efficiency/easy to implement" and "low efficiency" / Difficulty to implement" four situations (excerpted in the table on the right). When this form is completed, the "red light" should have an obvious conclusion: we need to take immediate action on the "high-efficiency/easy to execute" project and seek breakthroughs in the "high-efficiency/difficult to execute" project. The meeting seems simple, but in fact, it is not. We still have a lot to learn.

——Author：Mrs. Zhu-Fang, Huang

The viscosity of the epoxy resin is often different due to different formulations and often needs to be adjusted in order to match the processing characteristics of customers. The viscosity of the ordinary epoxy resin is about 15,000cps. There are several ways to increase the viscosity of epoxy resin: 1. Incorporating solid epoxy resin into liquid epoxy resin is the simplest and most common method, and this method usually only increases the viscosity without affecting other characteristics of the resin. 2. Melt the thermoplastic (such as phenoxy resin, polyurethane) into the liquid epoxy resin. In addition to increasing viscosity, this method can also improve other properties (such as increased toughness, impact resistance), but special consideration must be given to compatibility issues before and after curing. Sometimes high molecular weight thermoplastics may undergo phase separation, so the cured product is opaque. 3. Use an anti-sagging agent to increase viscosity, in addition to the increase in viscosity, it will also produce shake characteristics.

After graduating from graduate school three years ago, it was my first job to work at Everwide Chemical. The company conducts two-month short-term training for several of our new recruits in the R&D department at the same time: 6 hours of work per day, 2 hours of class, 2 hours of self-study. Since the content of the class is mainly related to the field of "epoxy resin", we have not been exposed to this kind of material in our school days, so it is naturally very strange to me. For the teaching materials, there are only "rote memorization" and "full reception" and I don't know where to apply what I have learned. Of course, the final exam was written with "dead memorization." Newcomer training is not just a lecture on theory, but also a small batch of basic training and on-site production participation is part of the courses. These activities allow us to quickly integrate with colleagues in other departments of the company, and make us more hard-working. Because of the basic skills I learned during the training, it was easier for me to use them later when I entered the laboratory. After the actual operation, it was easy for me to memorize the content of the class. Now when I encounter something I don’t understand at work, I still go to look through the training materials in the past! Maybe it takes a lot of manpower and time to train new people, but from my personal experience, I think it's all worthwhile.

─Author: Ms. Li-Ling, Liu R&D Training Phase Io