Binary liquid mixture resin – The voices of developers
The expected style of adhesive technologies
UV curing and ambient temperature curing
Unlike epoxide-based binary liquid reaction adhesives, the binary liquid mixture adhesives we handle are based on a technology which enables curing by catalytic reaction, and are able to manifest their properties even with such a mixing ratio.
Like general UV curing adhesives, this type of adhesive is cured by light and constantly at a temperature lower than ambient temperature, thus enabling curing even in a place which hardly receives any light.
Approach to “binary liquid mixture resin”
We have been engaged in the development of binary liquid curing adhesives for a long time, and we are determined to start development of this technology with an aim to simultaneously achieve excellent readiness (line throughput) due to UV curing and secure curing properties of non-irradiated parts.
As this product starts to react when mixed, we had to prevent it from being cured too rapidly for commercialization. Therefore, we have successfully developed the current technology by maintaining a long pot life (available period), searching for materials which allow secure curing without being affected by the shape of the parts to be bonded, and examining possible compositions.
At the time of development, we compared the UV-anaerobic type and UV-primer type. Meanwhile, there was a case requiring the adhesion of a motor substrate and a coil, and it was a porous material for which the anaerobic type or primer type was not effective. Thus, we developed the “binary liquid mixture resin” characterized by secure curing and adhesive properties for a coil having internal layers of air. This technology was subsequently applied to HDDs, for fixing wound coils for drive use, and for the assembly of small-size speakers.
We gained the results unexpectedly!
At the start of the development process, we thoroughly screened every curing catalyst which belonged to the radical system. However, most of them cured in about 1 or 2 hours or seldom cured. Furthermore, their surface uniformly stayed watery and slippery due to the lack of surface hardening.
I threw the samples in the trash box as they seemed unchanged even after leaving overnight. However, I noticed that although their surface was glossy like enamel, they were completely cured, so I immediately collected them from the trash box. Since then, I have been engaged in development activities relating to the radical reaction system using acrylic oligomer by focusing on the control of surface hardening and the extension of pot life.
Upgraded and amplified product power
In case of the binary liquid mixture resin, the adhesive is cured without fail even in a place which does not receive light on condition that it is left at ambient temperature for a certain period of time. Thus, it is a favorable product also from the viewpoint of quality assurance.
Furthermore, because it is cured under the irradiation of UV rays, agent A or B alone can achieve curing if it is irradiated with UV rays.
Curing with a primer is possible. A method in which parts which can be subjected to UV rays are cured first, and then the product is temporarily fixed in accordance with the line takt by making use of its properties whereby the reaction completes at ambient temperature, is also possible. This type of product uses two types of resin and therefore there are customers who claim that process management is not easy. However, I would like you to know that once you use the product, you will understand its usability and convenience, and be unable to do without it.
Development is supported by communication with clients
We engage in development activities by listening to our clients’ requests.
While this attitude creates some negative aspects such as many highly customized products, we consider this necessary, as most clients are not satisfied with ready-made products. In some cases, the developers and sales personnel attend a meeting with our clients to directly hear their opinion. We are confident that our enthusiastic approach to development activities supports our product development and proposal capabilities.
Our “UV curing adhesive” products including this “binary mixture resin” product are based on very special materials different from other adhesive products, and comprehensive knowledge of overall adhesive products and sufficient proposal capability are required to offer information to our clients. One of our strengths is that we have analysis facilities, etc., used for improving and developing products to meet the diverse needs of our clients, and we can meticulously analyze the factors causing defects.
Based on these technologies and facilities, I am determined to be an engineer who can offer accurate proposals by faithfully responding to the needs of clients.