Abstract:
A PROCESS FOR THE PRODUCTION OF SANDWICH CONSTRUCTIONS CONSISTING OF (A) AN INNER PLY OF POLYETHYLENE; (B) ADHESION-PROMOTING INTERLAYERS APPLIED TO BOTH SIDES OF THE INNER PLY AND (C) OUTER PLIES OF METAL APPLIED TO THE TWO INTERLAYERS. IT IS A CHARACTERISTIC FEATURE OF THE INVENTION THAT SHEETING IS PREPARED CONTINUOUSLY FROM A SPECIAL POLYETHYLENE BY MEANS OF A SCREW EXTRUDER AT A SPECIFIC TEMPERATURE OF THE MATERIAL, THIS SHEETING IS COVERED ON BOTH SIDES WITH A FILM OF A SPECIAL TERPOLYMER BY MEANS OF A PAIR OF ROLLERS, THE RESULTANT LAMINATE IS THEN COVERED CONTINUOUSLY BY MEANS OF A PAIR OF ROLLERS AT A SPECIFIC TEMPERATURE OF THE MATERIAL WITH METAL SHEETING HAVING A SPECIFIC TEMPERATURE AND THE WHOLE IS COMBINED TO FORM A SANDWICH PANEL UNDER A SPECIFIC ROLLER PRESSURE. THE PROCCESS GIVE SANDWICH CONSTRUCTIONS HAVING PARTICULARLY GOOD CHEMICAL AND PHYSICAL PROPERTIES IN A SIMPLE WAY.
Abstract:
A process for the production of sandwich constructions consisting of (a) an inner ply of polyethylene; (b) adhesionpromoting interlayers applied to both sides of the inner ply and (c) outer plies of metal applied to the two interlayers. It is a characteristic feature of the invention that sheeting is prepared continuously from a special polyethylene by means of a screw extruder at a specific temperature of the material, this sheeting is covered on both sides with a film of a special polymer by means of a pair of rollers, the resultant laminate is then covered continuously by means of a pair of rollers at a specific temperature of the material with metal sheeting having a specific temperature and the whole is combined to form a sandwich panel under a specific roller pressure. The process gives sandwich constructions having particularly good chemical and physical properties in a simple way.
Abstract:
A process for the production of plane building components, comprising relatively thick inner ply of a thermoplastic and relatively thin outer plies of metal. In the process a board is prepared continuously from a polyethylene by means of an extruder at elevated temperature, the board thus obtained is continuously covered on each side first with a film of an ethylene polymer containing carboxyl groups by means of at least one pair of rollers and then with metal sheeting, the whole being made into a sandwich assembly under roller pressure and the plane building component formed being cooled to ambient temperature.
Abstract:
A PROCESS FOR THE PRODUCTION OF PLANE BUILDING COMPONENTS WHICH ARE COMPOSED OF A RELATIVELY THICK INNER PLY OF A THERMOPLASTIC AND RELATIVELY THIN OUTER PLIES OF METAL. IN THE PROCESS A BOARD IS FIRST MADE CONTINUOUSLY FROM A POLYETHYLENE BY MEANS OF A SCREW EXTRUDER AT ELEVATED TEMPERATURE THEN THIS BOARD IS COATED ON BOTH SIDES BY MEANS OF A PAIR OF ROLLERS CONTINUOUSLY WITH A FILM OF A SPECIAL TERPOLYMER AND THEREAFTER WITH A SHEET OF METAL. THE WHOLE IS MADE INTO A SANDWICH ASSEMBLY BY THE PRESSURE OF THE ROLLERS AND THEN BROUGHT TO AMBIENT TEMPERATURE.