Yongkuan News
Yongkuan Chemical Newsletter-Issue 315
Release Date: 2019-12-30

experimental report § Low viscosity moisture hardening glue for electronic products

近期一直有客戶詢問是否有低黏度的濕氣硬化型產品,我們通常都是推廣黏度約為8000 cps的透明版FS0665,但是對於某些客戶來說此黏度還是太高了,無法符合其製程所需。為什麼市售品沒有更低黏度的東西呢?原因是低黏度的成分通常會使接著劑的機械性質及接著力有所下降,所以很難達兼顧黏度低與實用性。近期我們突破瓶頸,能夠在更低的黏度下(約2000 cps),還保有一定的機械性質、剪切拉力。產品編號分別為有含錫觸媒的FS191以及不含錫觸媒的FS132-23。圖1是FS191、FS132-23及FS0665的剪切拉力比較,圖2為其在短時間內PC試片的拉力比較,圖3為其在金屬對塑膠的拉力比較。為了能符合更多客戶不同的點膠方式,我們推出30ml的膠管包裝,可以應用在微小零件的接著及組裝(圖4)。目前FS191於久放後會有黃化現象,但不影響接著力;我們已經著手改善這個黃化的現象(圖5),並且同時提昇它對ABS的接著能力
─ Author: Mr. Cheng Yuxiang
About Yongkuan § Health is priceless

Employees spend more than one-third of their time in the workplace, so ensuring the safety and health of their partners is an important part. We regularly provide on-site health services with special nurses and professional physicians (Figure 1), all employees have physical examinations every year, and regularly organize health education lectures on different topics to increase health knowledge, such as cancer prevention and screening, anti-stress good mood, etc. (Figures 2,3, XNUMX). In addition, we also have groups to participate in outdoor activities such as public welfare road running. Prevention is better than cure. If you want to have a strong body, you need to accumulate bit by bit every day. You should have a balanced diet, develop good exercise habits and do regular health checks on a daily basis. Let us move and embrace a healthy life!

Knowledge exchange § Why the dipole moment of Si-O bond is high, but the polarity of Silicone is very low?

In general, the higher the dipole moment of a chemical bond, the uneven distribution of charge between the two atoms. One atom is partially positively charged and the other atom is partially negatively charged, making the molecule more polar. However, because of the large volume of Si atoms in the Silicone structure, the polymer arrangement of Silicone appears to be a helical arrangement. This structure causes the dipole moments in the molecules to have no common direction, and the dipole moments in different directions will Mutually offset each other, so Silicone material appears like low-polarity molecules.

Biweekly strike § The 10th Japan Makuhari High Performance Materials Exhibition

此次參展日期為2019年12月4~6日三天。3日一早就趕赴會場,如火如荼地、小心翼翼地將我們的攤位進行整理與布置。公司展出主題有MS、epoxy與PP接著的應用樹脂。此行同仁各自肩負重任:我的任務是在三天內參加12場專題演講,也就是每一天的上半天與下半天各2場,蒐集演講的寶貴資料,以及在空檔時間回防站櫃。我在演講之間的空檔,就一路由演講會議廳(Hall 8)逛回到我們攤位(Hall 2)。因為會場太大還未回到攤位時,時間已經來到下一場演講,所以我就又急忙地回去會議廳參加下一場專題演講,這三天下來就是如此反覆迴圈,猶如急行軍一樣的緊迫,但也收穫滿載。站攤位時,接觸到各行業的專業諮詢與問題,當下突然回想起大學長說:「會來看展與諮詢的人士,都是遇到無法解決的問題,才來進行諮詢。」因此,我總是耐心且盡可能地回答五花八門的問題,冀望能有延續性合作。此次參展一方面持續讓世界看見永寬,也獲悉當前與未來的應用需求。最後,容我以大學長的話來勉勵同仁,國際展會的參加是有其必要性,主要能夠清楚各公司的研究方向與主題,知己知彼,方能百戰百勝。
─ author: Dr. Wu Jiaxing