During year 1961 in printing industry, rubber squeegee was made in synthetic rubber and oil resistant rubber. However, these products has face problem that when printing ink contains benzoyl-based and petroleum-based solvent, the rubber will easy to swollen, and wear out quickly. Also, with same rubber color, hardness needs to check by bending, which in in-convenient when installing to machine.
Mino Group did lots of experiments and tests to challenge on solving rubber problem. Within varies tested materials, poly urethane rubber made by Bayer company provides the most ideal result. This rubber has no swollen with petroleum-based solvent, and low swollen problem with benzoyl-based solvent. As a raw material, it has much longer usage life comparing to traditional product.
for squeegee blade problem of similar outlook, by separate urethane rubber type and hardness with different color, rubber can distinguish by eye observation. This lower the miss on wrong hardness application, lower lost and increase work performance.
This technique started by Mino Group is welcome by the printing industry and spread around very quickly. The news go oversea, which highlights brand name of Bayer company, and squeegee rubber in screen printing uses poly urethane rubber after that. Years pass, squeegee rubber is still the current global standard in printing industry.
