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Everwide Newsletter No.318

Experiment § Pressure-sensitive adhesive testing machine

Tapes vary according to the functional requirements for adhesiveness. Everwide has developed UV-curable pressure-sensitive adhesives (solvent-free PSA) for many years. In order to use different verification methods to ensure the reliability of the product, we have newly purchased four test equipments for the physical properties of pressure sensitive adhesives. (Figures 1-3). When tape products are used at room temperature and high temperature, retention is an important indicator. Adhesives with insufficient retention may fall off and cause damage in a short time (Figure 4). Figures 5 and 6 are the initial adhesion test machine to confirm that the viscosity is within the allowable range of the customer. Figure 7 is an electric rolling roller machine: the adhesive tape will affect the adhesion strength due to the different pressures applied by the user. In order to control the change, the machine is used to apply a fixed number of times and weight. In the case currently developed, the thickness of the glue is 150um, and the load of five kilograms can not fall off for more than 2 to 3 months. You are welcome to contact us if you are interested!

─Author: Tung-Chi, Pan


Activity § Annual Exhibition

This year 4/15~4/18─Taipei International Automotive Electronics Show, 6/24~6/27─Thailand International Electronics Production Equipment & Electronics Show, 9/9~9/11─China International Optoelectronic Expo, 9/9 ~9/11Vietnam International Electronics Manufacturing Exhibition. Language issues and cultural differences are inevitable challenges. This year, colleagues from different nationalities will join us , injecting us with a new force. Welcome you to visit us at the booth next time.


Knowledge § What is the curing mechanism of the additive silicone?

The curing principle of additive silicone is that the vinyl group on the Si atom and the siloxane containing Si-H functional group, under the catalysis of the transition metal compound (for example: platinum catalyst), undergo addition reaction to form new Si-C key. This reaction cross-links the linear structure into a network structure. Compared with shrink-type silicone rubber, the addition-type silicone reaction has no by-products, the reaction rate has little to do with environmental factors, and has a high conversion rate. Therefore, many applications use the addition-type silicone rubber. Addition silicone has some disadvantages: it has poor adhesion ability. Commercial products often add non-reactive silicone oil, which may cause catalyst poisoning... etc., still need to be properly evaluated before application.


Living § Time in Xitou

I prefer the sea view to the mountain view. In addition to the vast heart that the sea brings to me, the waggling sound of the waves lingering in my ears can touch my hearty emotions, and my heart will begin to play a surging symphony. At first, I didn't like to climb mountains, because I had bad knees and dumb ankles, so I crooked my feet and hurt my hips while climbing. But in order to accompany my husband to train himself, I decided to visit the mountain forest again. What brings me back to Xitou again and again is because of the experience of passing by an elderly couple on the "Ginkgo Trail". They are fully equipped and at the same pace. I feel that in addition to their similar interests, they also explain the beauty of mutual companionship! As I climbed the mountain, I watched people's faces and listened to the content of the words, and learned to check my status. When life is like living for others, you should try to start paying attention to yourself and live for yourself!

─Author: Chia-Fang, Chang


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