HOT MELT ADHESIVE FOR POLYOLEFIN FILMS

• Main Authors: THOMAS, Julia, KLINGBERG, Wolfgang, CASPERS, Alexander, MILLS, Kevin, KLEWE, Oliver, SWAIN, Andy, EASDOWN, George, HERLFTERKAMP, Bernhard, HÜBENTHAL, Marcel, SCHRÖTTLE, Michael, ECKERS, Mario, PÜRKNER, Eckhard, STRENGER, Stefan
• Format: Patent
• Language: English; French; German
• Published: 01.12.2021
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES

A hot-melt adhesive composition is disclosed. The hot melt adhesive comprisesa) 25 to 95 wt %, preferably 50 to 85 wt % of at least one polyolefin-based polymer;b) 1 to 75 wt %, preferably 1 to 40 wt % of at least one tackifying resin;c) 0 to 15 wt % of at least one plasticizer; andd) 0 to 30 wt % of at least one additive and/or adjuvant selected from among stabilizers, adhesion promoters, fillers or pigments, waxes, and/or other polymers or combinations thereof,characterized in that the at least one polyolefin-based polymer is a mixture of:a1) at least one first polyolefin-based polymer with a molecular weight Mn of <10,000 g/mol in a quantity of 20 to 80 wt % with respect to the total quantity of polyolefin-based polymer, anda2) at least one second polyolefin-based polymer with a molecular weight Mn of >10,000 g/mol in a quantity of 20 to 80 wt % with respect to the total quantity of polyolefin-based polymer. The adhesive is particularly useful for gluing polyolefin films, woven fabrics, or nonwoven fabrics. Also, methods for manufacturing packaging and fabric with the hot-melt adhesive above are disclosed.