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Everwide Newsletter No.122

Experiment § Adhesive application of hook

In the early days, we always used nails to add decorations or shelves to the wall, thus destroying the wall structure. Later, the non-marking hook was invented to solve the above-mentioned shortcomings. Recently, there are new environmental protection hooks in the market, and their characteristics are that they do not leave any residual glue even after multiple displacements, it is very convenient without drilling holes, and there is no need to replace the adhesive strips during repeated pasting, and the carrying weight is about 1.5Kg. Environmentally friendly hooks are made by combining PMMA or PC hooks and PET substrates, printing decorative patterns on the PET, and coating the bottom with re-adhesive pressure-sensitive glue. The GM498 series developed by Everwide Chemical can firmly bond the hook to the substrate, and then the strength exceeds the material itself, so it meets the requirements of material rupture. Please don't forget us when you use the beautiful environmentally friendly hooks in the future.

─Author: Ms. Chun-Xiang, Li


Activity § High-value use of UV resin application business opportunities seminar

On July 27, 2012, the Industrial Technology Research Institute and the Taiwan Paint and Coating Technology Development Association jointly held a "High-value UV Resin Application Business Opportunity Seminar". Mr. Hong Can Xian of Everwide Chemical was invited to give a speech on the topic: Functional PET precision coating resin. Everwide Chemical is constantly challenging in the field of UV-curable resins, and it is one of the goals that it strives to achieve for the surface curing of PET/PC sheets. Everwide provides 100% UV glue and solvent-based UV glue for application on optical grade coating cured film, and its advantages are lower cost and the same quality as Japanese products. Because the coating technology required by customers is different, participating in the meeting can enable UV R&D personnel and coating manufacturers to better understand the original intention of the formulation design. This course content: 1. Introduction to the principle of light-curing resin. 2. Introduction of functional PET precision coating technology. 3. Introduction to the application of Everwide products: (1) Micro-structural texture glue, (2) Turnover master film glue, (3) PET high-hardness coating resin, (4) PET anti-glare sheet development, (5) PET anti-glare (6) Development of anti-fingerprint coating resin.

─Author: Mrs. Can-Xian, Hong


Knowledge § How to evaluate the shelf life?

1. Appearance. Many chemical raw materials tend to gradually turn yellow after being stored for a long time. This kind of change may not affect the quality, but it may not be approved for applications that require color. 2. Viscosity. The viscosity of UV glue or one-liquid epoxy may gradually increase during storage, and it can be accepted by customers within a certain range, which is the shelf life. 3. Thixotropy. Certain products add anti-sagging agents to produce thixotropy, and its effect will gradually decline over time, and then unexpected collapse, sag, and diffusion will occur. 4. Uniformity. Some products are microscopically heterogeneous systems, with powder or granular curing agents or fillers added, and precipitation or floating may occur after long-term storage. There are also some electronic-grade raw materials that may crystallize after long-term storage. These phenomena must be included in the consideration of product uniformity. 5. Reactivity. Some catalysts will have poor reactivity after prolonged storage or even no reaction. There are also some catalysts that deteriorate after being stored for a long time, become more reactive, and lose the characteristics of temperature response. When evaluating the shelf life, we must especially consider whether the reactivity of the product has changed. 6. Mechanical strength. Additives in many products, such as silane coupling agents, may undergo hydrolysis reaction and gradually become ineffective after prolonged storage. The changes of these trace additives are difficult to detect with instrumental analysis, and the best way is to carry out confirmation actions through actual experiments when setting the shelf life.


Living § Neighbors’ needs

Our neighbor is a company that makes latex gloves. The boss of this company, Huang, developed in the Douliu Industrial Zone earlier than us, and we didn't know each other until recently through the introduction of the bank. He knows that we are making the paste, and we just learned that his iron factory has 10,000 molds, which are like parking towers, and they keep spinning in the high-temperature tower. In simple terms, making gloves is to take a ceramic hand mold, impregnate it with latex, and then bake it to form a pair of latex gloves. Boss Huang made money by making glove machinery at the beginning, but later he made his own gloves to sell. It has been 60 years and he still uses the factory as his home. There are one million glove molds in the mainland factory, but Taiwan is just a piece of cake. After he arrived on the mainland more than ten years ago, his technology began to be learned by others. Coupled with the recent government's strict monitoring of high-energy-consumption and high-polluting industries, he was forced to move to second-tier cities inland. The entire investment environment is not as good as before. Just do it steadily, So he thinks it's best to do it steadily. A few years ago, boss Huang came to me to chat and asked me if there was any way to develop UV-irradiated latex. Because he spends a lot of money on gas consumption every month. If he can use UV to dry, it will definitely save a lot of costs. Because no one has thought about the problem, so in the end, there are still two words "no solution." Recently, he asked me again, "Can your research and development help me repair the ceramic and metal pieces?" Their manufacturing process often accidentally smashes the ceramic molds, which consumes a lot of money, and they want to use iron plates to repair them. Before getting to know Everwide, he had visited many companies, and the glue sent by those companies would be degummed within two weeks when the furnace kept running at 1500°C. Our R&D department developed an epoxy resin with a Tg of 1700°C for Mr. Huang to test. After two weeks, boss Huang said, "That stick of glue has fallen out again." I picked it up and saw that a piece of the ceramic was indeed missing. He later soaked it in nitric acid and found that it had great chemical resistance. So boss Huang asked us to stick the four molds with our glue, and he would put the glued molds on the stove at 1700°C and bake them. The fun of doing a neighbor case is not about making money, but the point is to solve long-worried problems for customers. The history of Taiwan's glove industry 60 years ago is really a national treasure. I also asked Mr. Huang if he wanted to set up a sightseeing factory activity. Boss Huang said how is it possible! There is no place to visit in the factory, it's so hot inside!

─ Author: Mrs. Hui-Xu, Lee


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