Starch-based glue composition
AssigneeArgana Staerke GmbH
InventorsKarl-Juergen Mann, Martin Kozich, Dietmar Gruell, Marnik Michel Wastyn
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Abstract
A highly homogeneous starch-based glue composition is obtained by enzymatic modification of the starch with a branching enzyme which is supplied in an enzymatically modified starch with high long-term stability. The starch has a viscosity stability index SI of less than or equal to 1.3, calculated by the quotient of viscosity after 14 days and by viscosity after 2 hours after preparation of the starch. The starch is suitable for liquid storage, which is stable in the long-term, of a ready-to-use paste with a high bonding strength.
Claims14
A method of preparing a layered or laminated product, which comprises the steps of:
- providing a glue composition having an enzymatically branched starch with a viscosity stability index SI of less than or equal to 1.3, calculated by a quotient from viscosity after 14 days and the viscosity after 2 hours after preparation of the glue composition, wherein said starch has a mean molecular weight Mw (weight average), measured by light scattering, of from 60 kDa to 3000 kDa;
- and
- applying the glue composition as a gluing agent or a laminating agent to two surfaces of at least one of paper products, cardboard products, and displays made from paper or cardboard, wherein the glue composition bonds the two surfaces together to form a layered or laminated product.
A method for preparing a layered or laminated product, which comprises the steps of:
- providing a glue composition having an enzymatically branched starch that is enzymatically branched by a branching enzyme, wherein the starch has an average molecular weight MW (weight average), measured by light scattering, of from 60 kDa to 3,000 kDa, the composition having a viscosity stability index SI of less than or equal to 1.3, calculated by a quotient from viscosity after 14 days and the viscosity after 2 hours after preparation of the glue composition;
- applying the glue composition onto a first surface or layer of a product to be glued;
- and
- applying a further surface or layer of a product to be glued onto the first surface or layer with the glue composition in between in between the two surfaces or layers.
Dependencies are inferred from the claim text.