DE2853069

• Main Authors: ENGELHARD, FOREST, 4047 DORMAGEN, PUMP, WICHARD. DR., 4330 MUELHEIM, RIESS, REINHARD. DR., 5060 BERGISCH GLADBACH, KUHN, RAINER. DR., 5068 ODENTHAL, STREIB, HUGO. DR., 4150 KREFELD
• Format: Patent
• Language: English
• Published: 12.02.1981
• Edition: 3
• Subjects: ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMISTRY; COMPOSITIONS BASED THEREON; CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS,e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES,DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; CONVEYING; HANDLING THIN OR FILAMENTARY MATERIAL; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; MAKING GRANULES OR PREFORMS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PACKAGES; PACKAGING ELEMENTS; PACKING; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPRAYING OR ATOMISING IN GENERAL; STORING; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Laminate systems with improved bond strength prepared by coating of flexible substrates with low density polyethylene and a process for preparing said laminate systems are claimed which are characterized in that a polyethylene is used as a coating resin, which is obtained if (a) two autoclaves are connected in series such that all the reaction product of the first reactor is transferred to the second reactor, (b) a length-/diameter ratio (L/D) of 1:1 to 3:1 is chosen for each autoclave, (c) the monomer feed stream is distributed between the two reactors such that the monomer feed stream to the first reactor is the same as or greater than the monomer feed stream to the second reactor, (d) the reaction temperatures in the two autoclaves are adjusted such that the reaction temperature in the first reactor is lower than the reaction temperature in the second reactor, (e) the initiator chosen for the first reactor is the same as or different from the initiator chosen for the second reactor, and which has a density of 0.915 to 0.930 g/cm3 and a melt index (190 DEG C./2.16 kp) of 0.2 to 20 g/10 minutes is employed as the coating resin.