Patent ID: 6048391
Filing Date: 2000-04-11
Classification: C08L,C09J,Y10T

Abstract:
A method of preparing batches of a glue for making corrugated board, said method comprises:providing a first mixing vessel with a first stirrer therein operated to create a first level of shearing;providing a second mixing vessel connected to said first vessel via recirculation means, said second mixing vessel having a second stirrer therein operated to create a second shearing which is at a level which is greater than said first level of shearing that occurs in said first mixing vessel;preparing a carrier by a first step of starting with a combination of a first amount of water, starch and lye, using a sequence wherein said water and starch are supplied to the first mixing vessel and then carried to the second mixing vessel via the recirculation means during the first step;a second step of adding a second amount of starch, water and borax to the carrier and mixing the aggregate into a homogeneous mixture; and adding lye to the second mixing vessel during said second step, after which a slurry formed by the preceding steps is recirculated between the first and second mixing vessels.