Fast packaging of glass-based microfluidic chip using adhesive polyurethane material

A fast packaging method is proposed to fabricate the packaging of glass-based chips using polyurethane (PU). The performance properties of this material can be justified by the A-glue/B-glue weight ratio. To choose an appropriate proportion of glues, water contact angle, 90 degrees peel strength, and shore hardness are employed to measure the PU material. By increasing the A-glue/B-glue weight ratio, the hardness of the PU board decreases, the peel strength increases, and the contact angle increases first and then decreases. Based on the performance of PU material, an A-glue/B-glue weight ratio of 3.6:1 is adapted to package the glass chip. However, the softness of PU led to the design and implementation of a stable plate to protect the chip. Mixing application experiment results verified the validity of the PU packing method. After comparing three packaging method, the glass-PU chip packing method was the most efficient and economical. Test results indicate that the PU Packing method can be widely used in the fabrication of microfluidic chips.