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1. DE000019604637 - Prodn. of filler-contg. biaxially oriented polymer film

Office
Germany
Application Number 19604637
Application Date 08.02.1996
Publication Number 000019604637
Publication Date 27.03.1997
Publication Kind A1
IPC
B29D 9/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
9Producing layered products
CPC
B29C 48/08
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
03characterised by the shape of the extruded material at extrusion
07Flat, e.g. panels
08flexible, e.g. films
B29C 48/288
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
285Feeding the extrusion material to the extruder
288in solid form, e.g. powder or granules
B29C 48/2886
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
48Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
25Component parts, details or accessories; Auxiliary operations
285Feeding the extrusion material to the extruder
288in solid form, e.g. powder or granules
2886of fibrous, filamentary or filling materials, e.g. thin fibrous reinforcements or fillers
B29C 55/00
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
B29K 2105/06
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
2105Condition, form or state of moulded material ; or of the material to be shaped
06containing reinforcements, fillers or inserts
B29K 2105/16
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR ; MOULDS, ; REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
2105Condition, form or state of moulded material ; or of the material to be shaped
06containing reinforcements, fillers or inserts
16Fillers
Applicants BRUECKNER MASCHBAU
Inventors SAHR ULRICH
SCHWUCHOW RAINER
Title
(DE) Verfahren zur Herstellung einer füllstoffhaltigen biaxial orientierten Polymerfolie und Anlage zur Durchführung dieses Verfahrens
(EN) Prodn. of filler-contg. biaxially oriented polymer film
Abstract
(DE)
Verfahren zur Herstellung einer ein- oder mehrlagigen biaxial orientierten Folie aus einem kristallisierbaren thermoplastischen Polymer, die wenigstens eine füllstoffhaltige Lage aufweist, bei dem man wenigstens eine Schmelze aus einem homogenen Gemisch des thermoplastischen Polymeren mit einem oder mehreren Füllstoffen herstellt, die Schmelze unter Bildung einer Vorfolie extrudiert und diese dann biaxial verstreckt, wobei man erfindungsgemäß die wenigstens eine Schmelze aus dem thermoplastischen Polymer und dem oder den Füllstoff(en) direkt aus dem füllstofffreien Polymer und dem oder den pulverförmigen Füllstoff(en) herstellt, und zwar vorzugsweise unter Verwendung eines Zweischneckenextruders. Der pulverförmige Füllstoff kann dabei im Extrudereinzugsbereich mit einem füllstofffreien Polymergranulat vermischt werden oder dem Strom der Polymerschmelze im Extruder zugesetzt werden.

(EN)

The invention concerns a process for producing a single or multilayer biaxially oriented foil of a crystallizable thermoplastic polymer which comprises at least one filler-containing layer. According to the invention, at least one melt comprising a homogeneous mixture of the thermoplastic polymer and one or a plurality of fillers is prepared and the melt is extruded to form a preliminary foil which is then stretched biaxially. The at least one melt of thermoplastic polymer and the filler(s) is prepared directly from the filler-free polymer and the powdery filler(s), preferably using a two-worm extruder. The powdery filler can be mixed with filler-free polymer granulates in the extruder inlet region or added to the molten polymer flow in the extruder.