Experiment § Thermally Debondable Pressure-Sensitive Adhesive
Thermally debondable pressure-sensitive adhesive is a two-component adhesive, once coated onto a substrate and cured, forms a specialized pressure-sensitive adhesive layer (Figure 1). This adhesive exhibits high adhesion strength at room temperature but significantly loses its adhesion at a specific temperature, enabling the adhesive layer to detach from the bonded object. This adhesive can be applied to substrates such as PET or PI plastic films (Figures 2–4) and is used in the electronics and optoelectronics industries, including multilayer ceramic capacitor (MLCC) stacking, chip dicing, grinding, flipping, and other processes. Depending on different processes or equipment, various debonding conditions can be designed, including low, medium, high, and ultra-high temperatures. We have developed a series of thermally debondable pressure-sensitive adhesives: GS858 debonds at 120°C for 3–5 mins; GS858-1 withstands 120°C for 1 hour, then debonds at 150°C for 5–10 minutes; GS858-2 withstands 150–160°C, then debonds at 180°C for 5–10 mins; GS858-3 withstands 170°C, then fully debonds at 210°C for 5–10 mins; GS858-4 withstands 180°C for 4 hours, then fully debonds at 250°C for 5–10 mins. The series leaves no residue at the specified temperatures. When UV debonding tapes fail to achieve the desired effect, thermal debonding adhesives provide an effective solution. For further inquiries, please feel free to contact us. — Author: Ms. Shi-Hui, Fan
Activity § Chiller performance evaluation and energy efficiency improvement
To maximize energy management efficiency, Everwide collected various information on the equipment list within the factory last year and measured the energy consumption data of each equipment (Figures 1-2). After monitoring, the energy audit report showed that three chillers (Main air conditioning units) in the factory had poor energy efficiency due to their age. The measured values of the cooling towers were higher than the energy efficiency standards for air conditioning equipment set by the Energy Bureau, at 0.75 kW/R. It was recommended that they be replaced with variable-frequency energy-saving equipment (Figures 3-4). When machines consume excessive energy, in addition to regular cleaning of heat exchange materials, removing algae and scaling can effectively reduce unnecessary power consumption, improving overall energy management effectiveness.
Knowledge § What is the brittle temperature?(2)
The brittle temperature of most plastics is quite close to the glass transition temperature. However, a few plastics exhibit a brittle temperature significantly lower than their Tg due to unique molecular motions. For example, the carbonyl group in polycarbonate (PC) has special motions, and nylon has longer straight-chain segments between the hydrogen bonds of the amide groups. These structures allow the material to undergo motion at very low temperatures, giving them exceptional toughness without requiring the main chains to undergo extensive motion like other plastics, which must exceed their glass transition temperature to exhibit toughness.
Living § Travel in Yunlin's Meiren Valley
When spring comes, the first flower that comes to mind is often the cherry blossom. If you want to enjoy a magnificent sea of cherry blossoms, the top choice is Japan, followed by Alishan or the northern mountains of Taiwan. Although these places are incredibly beautiful, the crowds can be overwhelming. At the end of February this year, my family and I visited "Meiren Valley" to view the cherry blossoms. Compared to the bustling Alishan, this place offers a peaceful and serene atmosphere. Before our trip, we did our research to avoid the traffic, so we left at 6 AM, took County Road 149, and then transferred to a shuttle bus up the mountain. We got off at "Su Family Farm," where we walked and enjoyed the scenic views along the way, ultimately reaching "Jiouqiong Sacred Tree." The whole mountain was covered in pink cherry blossoms, greeting us like a floral arch, creating such a romantic scene! That day's weather was cool, perfect for a leisurely walk with my family while chatting. Our camera shutters never stopped. From February to March, there are no new tea leaves to harvest at Su Family Farm, so the cherry blossoms take over. The cherry blossoms here include Yaezakura, Kawazu-zakura, Weeping Cherry, Tri-color Cherry, Winter Cherry, White Tea Mountain Cherry, Mountain Cherry, and Fuji Cherry. We found a spot in full bloom and not crowded with people. We laid a picnic mat and ate lunch under the cherry trees. The best part was that everyone respected the flowers and trees; no one was climbing or shaking the branches. Have you ever experienced this kind of "Sakura Romance"? If not, don't miss the opportunity every February during cherry blossom season—let's enjoy the cherry blossoms together!
— Author: Ms. Ying-zhu, Huang
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