Experimental § UV pressure sensitive adhesive with high temperature resistance and high initial viscosity
Pressure Sensitive Adhesive (PSA) is an adhesive that is sensitive to pressure. It can adhere to the surface of the substrate in a short time, and then the strength has a direct effect on the pressure applied to the surface of the substrate. Recently we have developed GC152-1, a 100% solid content UV pressure-sensitive adhesive. This adhesive material can be used for tape production and can be used in a variety of fields according to its thickness. It has high-temperature resistance, high initial viscosity, and ductility. The product still maintains adhesion in a high-temperature environment of 70℃~110℃ and has excellent adhesion strength to plastic, metal, glass... and other substrates (Figure 1). Figure 2 shows that the adhesive material is coated on PET and then pasted to the steel plate. The cohesion lasting time at a high temperature of 110 ℃ can reach 48 to 72 hours. The shear strength and 180∘angle peel strength are 3.2 kgf/cm2 and 11.2-12.0 N/cm, respectively (Figures 3 and 4). The product features are that it lasts up to 3 days at a high temperature of 70℃ and 90∘ peeling angle (Figure 5). Currently, we continue to develop PSA for special applications. Please pay attention to our new product announcements. Welcome to inquire and advise. For more information, please click the link
─Author: Dr. Wu Jiaxing
Activity § A fulfilling July
NYUST’s Chemical-material students who have completed their internships in the first half of the year presented orchids and thank-you cards. Thank you seniors for your enthusiastic teaching, which has benefited them a lot. My associates are really touched (Figure 1). A new batch of energetic interns is also welcome to join and start their workplace experience (Figure 2). IATF16949 internal audit has held concluded, we will begin to discuss and implement improvements, and hope that the details can be made more carefully (Figure 3). To maintain a pleasing environment, our partners worked together to reconstruct the bougainvillea on the fence wall (Figure 4). Although non-stop sweating for every day, but isn’t it worthy to create hopes from small things?
Knowledge § What is UV moisture dual curing resin?
Acrylic-based light-curing resin undergoes free radical polymerization when exposed to light, achieve the purpose of curing. Many applications have side and corner obscurations, and thus have the concern of no lightning, and causing resin unable to polymerize. The unreacted light-curing resin may produce volatiles, which may infiltrate the plastic components and cause cracks, and may also affect the electrical properties of the parts... and cause application restrictions. In addition to the acrylic group, the structure of UV moisture dual curing resin also has a functional group called isocyanate, which can react with moisture in the air to form urethane and cured. In other words, it can quickly cure under the irradiation of light, and the unexposed areas will be cured by moisture in the air after 3-5 days, which expands the application field of light-hardening resin.
Living § Trip to Poland
During my Ph.D., I once spent almost two weeks in Poland for participating in the seminar. Poland has a wealth of historical and cultural, scenic assets, and the advantages of matured transportation. The locals are friendly and have very little crime. The living costs are similar to those in Taiwan, making it suitable for self-guided travel. Poland is a hub connecting Eastern and Western Europe and has been ravaged by wars in history. The capital, Warsaw, was almost destroyed in the Second World War, but they were united and determined, relying on photos, paintings, and residents' memories... to recreate the old city brick by brick, bring back the prosperous style of the 17th and 18th centuries. There are so many fascinating sights in Poland, and Chopin Park is one of them. At the entrance, there is a five-meter-high statue of Chopin standing to welcome visitors. The garden is full of greenery, the breeze is slow, and melodious movements are heard from time to time. The laid-back atmosphere fills the air, making people feel relaxed. Gdansk is the most important seaport here, connecting the neighboring towns of Sopot and Gdynia. These three cities have different riverside scenery and beach styles. What overwhelmed me during the journey was that on the streets of Sopot, there was a very conspicuous building called "Haha House". Its appearance was twisted as if it came out of a haha mirror. It was very exceptional and beautiful. Speaking of which, the urge to visit this place again comes to my mind, and I highly recommend it to you!
─Author: Dr. Chia-Lin, Liao
