Dual cure epoxy resin that can be temporarily fixed by UV irradiation and fully cured by heating

The latest model smartphones and automobiles are equipped with many cameras and sensors. Cameras and sensors are unitized using many adhesives such as UV curing type resin and heat curing type resin. With the increasing precision of these parts, there is a demand for adhesives that can be precisely fixed, have great adhesive strength for various materials, and have little deterioration. In addition, the number of cameras and sensors installed is increasing year by year, and there is a need for adhesives that can simplify the unitization process and increase productivity.

Features

  • Precise temporary fixing is possible by UV irradiation.
  • It is possible to cure parts that cannot be irradiated with UV by heating.
  • Has great adhesive strength for various materials.
  • There is almost no decrease in adhesive strength even under long-term use.

Uses

  • Fixing the lens and lens barrel of the camera module
  • Fixing the lens barrel and board of the camera module
  • Fixing LiDAR parts

Development points

ThreeBond has commercialized UV-curing type acrylic resins and epoxy resins. In light of this, we worked on the development of an adhesive used for precision fixing of camera parts, and optimized the combination of materials whose main component is a special epoxy resin. Also, by adding an inorganic filler, shrinkage of the cured product is suppressed and misalignment of parts is minimized. In addition, by making full use of the curing technology that we have cultivated so far, we have realized the commercialization of "Dual Cure Epoxy Resin Adhesive" that can be temporarily fixed by light irradiation and can be cured by heating the parts that cannot be irradiated with light.

Properties and general characteristics

Comparison of adhesive strength with conventional products

Lap shear strength

ThreeBond3142, a dual-cure epoxy resin, has the same adhesive strength as existing UV-curing type resins and heat-curing type resins, and is used not only for glass and metal but also for materials such as plastic.

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