Patent ID: 6062723
Filing Date: 2000-05-16
Classification: C08L,C09J,Y10T

Abstract:
A device for making batches of glue for a corrugator, said device comprising a large mixing vessel with a stirrer therein, a plurality of supply means for supplying starting materials comprising at least starch and water to partially form a carrier in said large mixing vessel, a small mixing vessel coupled to said large mixing vessel via recirculation means, said small mixing vessel containing a stirrer for exerting an amount of shearing force which is greater than an amount shearing force exerted on said carrier by said stirrer in said first mixing vessel, a supply means for supplying at least said lye to said second mixing vessel, and a discharge means for discharging a glue product,said device carrying out a process comprising the steps of:a first step of preparing said carrier in said large vessel by starting from a first amount of water, starch, lye, which is then injected into said large vessel,using a sequence during the first step wherein said water and starch are supplied to the large mixing vessel and then carried to the small mixing vessel via the recirculation means,a second step of adding a second combination into said small vessel of an amount of said starch and water to the carrier and mixing the resulting carrier composition into a homogenous mixture,the amount of said starch used in said first step being less than the amount of said starch added in said second step,adding a second amount of lye into the second mixing vessel to further prepare the slurry, after which recirculation between said large and small vessels takes place, andwherein the second amounts of said starch and water are added to said carrier after the carrier has reached a predetermined viscosity.