An improved nozzle box is disclosed having side walls spaced apart from each other, a base and a ventilation wall spaced apart from it, thereby forming an interior space. A plurality of ventilation openings arranged offset to each other is provided in the ventilation wall, the nozzle box is provided on its ventilation wall with a plurality of protrusions that are raised by at least a height (H) in relation to the sections of ventilation wall or the top side or surface of the ventilation wall the sections being located adjacent to the protrusions, the ventilation openings are configured raised in the region of the protrusions in relation to the top side or surface of the ventilation wall and/or the ventilation wall includes in the transverse direction (Q) of the nozzle box opposing side flanges that overlap the side walls of the nozzle box outside the interior space of the nozzle box.
A multipart gripper unit for a transverse, longitudinal and/or simultaneous stretching unit is disclosed having a main part and at least two guide parts. The main part includes a base body as well as a clamping device for clamping a material web and the guide parts each comprise a base body as well as at least one guide element for guidance on a rail of the stretching unit. The base bodies of the guide parts and the base body of the main part are each manufactured as separate component parts and attached to each other.
A biaxially-oriented film is disclosed having at least the layers (A) and (B), wherein layer (A) contains a polyethylene of a low molecular weight and layer (B) contains a polyethylene of a higher molecular weight, wherein layer (A) contains at least percent by weight of the polyethylene of low molecular weight, and layer (B) contains at least percent by weight of the polyethylene of high molecular weight and the film has a porosity in the range from 30 to 70%. The film may additionally be provided with a ceramic coating. A method for producing such a film by the Evapore process is disclosed.
B32B 27/08 - Produits stratifiés composés essentiellement de résine synthétique comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique d'une résine synthétique d'une sorte différente
B32B 27/32 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyoléfines
B32B 27/20 - Produits stratifiés composés essentiellement de résine synthétique caractérisée par l'emploi d'additifs particuliers utilisant des charges, des pigments, des agents thixotropiques
H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium
H01M 50/449 - Séparateurs, membranes ou diaphragmes caractérisés par le matériau ayant une structure en couches
B29C 48/00 - Moulage par extrusion, c.-à-d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désiréeAppareils à cet effet
B29C 48/08 - Moulage par extrusion, c.-à-d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désiréeAppareils à cet effet caractérisées par la forme à l’extrusion de la matière extrudée plate, p. ex. panneaux flexible, p. ex. pellicules
B29C 48/21 - Articles comprenant au moins deux composants, p. ex. couches coextrudées les composants étant des couches les couches étant jointes à leurs surfaces
B29C 48/91 - Chauffage, p. ex. pour la réticulation
A system (1) for producing a cast film (2) comprises a slot die (4), a cooling roll (5), an electrode arrangement (15), an insulator arrangement (20), a sensor device (30) and a control device (25). The electrode arrangement is arranged between an area of contact (9) of the cast film (2) on the cooling roll (5) and a drawing-off area (10). The insulator arrangement (20) is arranged between the electrode arrangement (15) and the cooling roll shell (6). The sensor device (30) continuously determines the left and right edges (2a, 2b) of the cast film. On the basis of the determined left and right edges (2a, 2b) of the cast film, the control device (25) moves the insulator arrangement (20) in such a way that the insulator arrangement (20): a) is located between the the left end face (5a) of the cooling roll (5) and the left edge (2a) of the cast film; and b) is located between the right end face (5b) of the cooling roll (5) and the right edge (2b) of the cast film (2b). A sensor region (31) of the sensor device (30) is provided downstream of the slot die (4) and upstream of the electrode arrangement (15) in the discharge direction of the cast film (2).
The present invention relates to a biaxially oriented film comprising at least the (2) layers (A) and (B), wherein layer (A) comprises a polyethylene of low molecular weight and layer (B) comprises a polyethylene of a higher molecular weight, wherein layer (A) comprises at least (50) weight per cent of the polyethylene of low molecular weight and layer (B) comprises at least (50) weight per cent of the polyethylene of high molecular weight and the film has a porosity in the range from 30 to 70 %. The film of the invention may additionally have been provided with a ceramic coating. The present invention has as a further subject a method for producing such a film by the Evapore process.
B32B 27/32 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyoléfines
B29C 48/21 - Articles comprenant au moins deux composants, p. ex. couches coextrudées les composants étant des couches les couches étant jointes à leurs surfaces
B29C 55/14 - Étirage suivant plusieurs axes suivant deux axes successivement
B32B 7/02 - Propriétés physiques, chimiques ou physicochimiques
B32B 27/08 - Produits stratifiés composés essentiellement de résine synthétique comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique d'une résine synthétique d'une sorte différente
B32B 27/20 - Produits stratifiés composés essentiellement de résine synthétique caractérisée par l'emploi d'additifs particuliers utilisant des charges, des pigments, des agents thixotropiques
C08J 9/28 - Mise en œuvre de substances macromoléculaires pour produire des matériaux ou objets poreux ou alvéolairesLeur post-traitement par élimination d'une phase liquide d'un objet ou d'une composition macromoléculaire, p. ex. par séchage du coagulum
The invention relates to a method for producing a film comprising at least 20 wt% thermoplastic polymer and 50 to 75 wt% inorganic filler, and comprises the steps: providing the mixture, melting the mixture, producing a thin layer from the mixture, cooling the thin layer, producing a film, stretching the film in the longitudinal direction and in the transverse direction, wherein the particle size of the inorganic filler is at most 5 µm and the stretch ratio in the longitudinal direction and in the transverse direction is at least 3.5. The invention further relates to films produced by this method and to the use thereof.
The invention relates to a biaxially oriented polypropylene film (BOPP) comprising layers (A) to (D), wherein layers (B) to (D) contain biaxially oriented polypropylene and layer (A) contains polyurethane and nanoparticles and has a layer thickness of 25 to 300 nm, layer (B) contains polymers with functional groups that are capable of forming covalent bonds with polyurethane and is directly connected to layer (A), layer (C) has at least one layer thickness of 50% of the total thickness of the film, and layer (D) represents an outer layer of the film containing an anti-blocking agent. The invention also relates to a method for producing films of this type.
B32B 7/10 - Liaison entre couches au moins une des couches ayant des propriétés inter-réactives
B32B 27/08 - Produits stratifiés composés essentiellement de résine synthétique comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique d'une résine synthétique d'une sorte différente
B32B 27/20 - Produits stratifiés composés essentiellement de résine synthétique caractérisée par l'emploi d'additifs particuliers utilisant des charges, des pigments, des agents thixotropiques
B32B 27/32 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyoléfines
B32B 27/40 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyuréthanes
B32B 37/00 - Procédés ou dispositifs pour la stratification, p. ex. par polymérisation ou par liaison à l'aide d'ultrasons
8.
VENTILATION MODULE FOR A FILM STRETCHING SYSTEM AND FILM STRETCHING SYSTEM OF THIS TYPE
The invention relates to a ventilation module (3) for a film stretching system (1) comprising at least one first outlet nozzle arrangement (8) having an outlet nozzle (8a), wherein the at least one outlet nozzle (8a) extends with its longitudinal direction (5) transverse or perpendicular to the withdrawal direction (4) of a plastic film web (2) and is oriented in parallel to the transport plane (7). A first return system (9) is provided with at least two extraction channels (10a, 10b), each having an extraction region (11a, 11b). The at least two extraction regions (11a, 11b) are spaced apart from one another in the withdrawal direction (4) and oriented in parallel to the transport plane (7). The at least one outlet nozzle (8a) of the at least one first outlet nozzle arrangement (8) is arranged between the first and the second extraction region (11a, 11b). The at least two extraction regions (11a, 11b) are arranged exclusively before and/or after the at least one first outlet nozzle arrangement (8) in the withdrawal direction (4) of the plastic film web (2).
The invention relates to a sliding element, in particular for a stretching installation and/or a conveyor chain, comprising graphite or electrographite, wherein the sliding element has pores which have an open pore size of ≥ 7.5 % by volume, and wherein the particle size of the graphite particles used as a starting material for the sliding elements is between 3 µm and 15 µm.
B29C 55/08 - Façonnage par étirage, p. ex. étirage à travers une matriceAppareils à cet effet de plaques ou de feuilles suivant un seul axe, p. ex. étirage oblique coupant la direction d'alimentation
F16C 33/16 - Surface de glissement principalement constituée de graphite
B29C 55/16 - Étirage suivant plusieurs axes suivant deux axes simultanément
An improved control apparatus for producing plastic films and an associated improved method are distinguished, inter alia, by the following features: - the control apparatus has two stages or at least two stages, - the control apparatus comprises, for this purpose, a sensor module and/or a sensor model and a process module and/or a process model, - the machine-dependent sensor module and/or sensor model and the production-dependent process module and/or process model are linked or can be linked to one another via production variables, - adjustable machine variables are connected or linked to plant production variables via the sensor module and/or the sensor model.
The invention relates to a film-drawing machine, including a furnace (1), through which one strand of an endless chain of clamps (4) passes, driven by at least one toothed wheel (8), characterised in that at least one toothed wheel (8) is inside the furnace (1), is rotated by its own gear motor (9) surrounded by a casing (12), placed in the furnace (1) and cooled by cooling means (13, 14), and is mounted on its own movement device (11), so as to pass from a withdrawn position, in which it does not mesh with the chain, to a drive position, in which it meshes with the chain. The invention also relates to a method for starting said film-drawing machine.
The invention relates to an improved method and to an improved device for degassing polymer melts and for neutralizing the thus produced pollutants, characterised by the following characteristics: said pollutants are guided to a plasma source (2; 2.1, 2.2, 2.3, 2.4) after removal from the degassing area (VD; VD1, VD2) and prior to adding to a filter step or a separator (4; 4.1, 4.2), said plasma source being built and/or formed such that in said plasma source (2; 2.1, 2.2, 2.3, 2.4), the pollutants are transformed, entirely or partially, in a plasma aggregate state.
B29B 7/86 - Éléments constitutifs, détails ou accessoiresOpérations auxiliaires pour travailler à une pression supérieure ou inférieure à la pression atmosphérique
B29C 47/40 - utilisant au moins deux vis qui s'engrènent
B29B 13/00 - Conditionnement ou traitement physique de la matière à façonner
B29C 47/00 - Moulage par extrusion, c. à d. en exprimant la matière à mouler dans une matrice ou une filière qui lui donne la forme désirée; Appareils à cet effet (moulage par extrusion-soufflage B29C 49/04)
An improved method and an associated improved device for operating a linear-motor-driven simultaneous stretching installation is distinguished inter alia by the following features: during normal operation, the linear-motor-driven transporting units (T) in the simultaneous stretching zone (R) are subjected to an acceleration phase with a normal-operation acceleration profile involving a growing increase in the distance (MDx-y) from a following transporting unit (T) driven by the linear motor drive; when the web of material (F) is moved into the stretching zone (R), at least two leading tenters (6), following one another and driven by the linear motor, are accelerated in the stretching zone (R) in such a way that differs from the normal-operation acceleration profile that the distance (Mda.b) formed between the at least two tenters (6) following one another and driven by the linear motor is less than 80% or less than 75% of the distance (MDx-y) that is brought about during normal operation.
Flaw detection by optical means. An improved device for detecting defects (7, 7') in an object (1), more particularly flaws (7) in the form of micro-holes (7') in a material web (1') or a film (1'') is distinguished by virtue of, inter alia, the following features: – provision is made for at least one primary light source (L, L1), by means of which a light beam is generable, – comprising a sensor and/or detection apparatus with a sensor or detector elements (SEs, SE), – comprising an evaluation apparatus (AE) for evaluating the defects (7), – the device with the evaluation apparatus (AE) comprises a balancing circuit for the sensor or detector elements (SEs, SE) in such a way that a balanced signal for evaluating defects is generated under the formation of the difference between a measurement signal generated by a sensor or detector element (SEs, SE) and at least one measurement signal generated by an adjacent or referenced sensor or detector element (SEs, SE).
An improved gripper with a toggle lever arrangement is characterized by, among others, the following features – the gripper (6) comprises a gripper lever (25c) which is pivotable with respect to a gripper holder (25a) around a gripper axis (25b), – the gripper lever (25c) is configured as a toggle lever (60') and comprises in addition a first and a second toggle lever leg (KH-S1, KH-S2) which are pivotable relative to each other around a toggle lever axis (60b), – in addition a force application unit (MK) is provided which acts on the second toggle lever leg (KH-S2) pivotable around the toggle lever axis (60b) and/or on the toggle lever flap (60c), – the force application unit (MK) is thereby configured such that during pivoting of the gripper lever (25c) from the release position into the closed- and clamping position thereof, the toggle lever flap (60c) initially touches down on the side of the gripper table (61) lying away from the material web (F) while prefixing the material web (F) in this region, before the toggle lever flap (60c) reaches the final closed- and clamping position thereof during the remaining pivoting process, in which position it is force-actuated in the direction of the gripper table (61) and holds the material web edge (Fr) clamped between the gripper surfaces (60d, 61d).
An improved apparatus for detecting defect sites (3) in dielectric material webs or moulded bodies (1), in particular in plastic films (11), is distinguished, inter alia, by the following features: - a position determination and/or detection device for detecting a flashover (25) between the first and second electrodes (7, 11) is provided and is constructed in such a manner that said device can be used to determine a position of the flashover (25) in the transverse direction (TD) and in the relative direction of movement (MD) of the material web to be examined or of the moulded body (1) to be examined, and - the position determination and/or detection device comprises at least one first measuring and/or sensor device and a second measuring and/or sensor device separate from the latter, - the at least one first measuring and/or sensor device comprises sensors for determining the position of a detected flashover (25) in the transverse direction (TD) of the material web, - the at least one second measuring and/or sensor device is constructed in such a manner that said device can be used to detect and determine the position of a flashover (25) between the two electrodes (11, 7) with respect to the relative direction of movement (MD) of the material web or of the moulded body (1), and - the first and second measuring and/or sensor devices are constructed in such a manner that the first measuring and/or sensor device is based on a different technical functional principle with respect to the second measuring and/or sensor device and/or - in such a manner that the sensors for the first and second measuring and/or sensor devices are sensors which operate in a functionally different manner.
G01N 27/92 - Recherche ou analyse des matériaux par l'emploi de moyens électriques, électrochimiques ou magnétiques en recherchant la tension disruptive
An improved adjustable-angle pressing or nip roll is distinguished, inter alia, by the following features: the angle adjusting device (WE) comprises a double-armed lever (7.1, 7.2), - the moving device (VF) is constructed in such a way that, via this, a pivot axis (8) of the double-armed lever (7.1) can be adjusted relative to the process roll (2), and the angle adjusting device (WE) comprises, for the double-armed lever (7.1, 7.2), a stop (9.1, 9.2) which acts at least on one side, in such a way that, in the case of further force loading by the force actuating unit (10), a pressing force (FR) can be generated which acts on the pivot axis (8) of the double-armed lever (7.1, 7.2) and via which the pressing or nip roll (3, 4) can be pressure-loaded onto the roll shell (21) of the process roll (2) with the material web (F) being guided through between the two rolls (3, 4; 2).
B29C 55/06 - Façonnage par étirage, p. ex. étirage à travers une matriceAppareils à cet effet de plaques ou de feuilles suivant un seul axe, p. ex. étirage oblique parallèle à la direction d'alimentation
B29C 63/02 - Garnissage ou gainage, c.-à-d. application de couches ou de gainages préformés en matière plastiqueAppareils à cet effet avec des matières sous forme de feuilles ou de nappes
The invention relates to an improved transporting unit for a transporting device, in particular for a transverse, longitudinal, and/or simultaneous stretching installation, wherein transporting units (KT) can be moved along a guiding and/or supporting rail (500) by means of a clip unit (KL) and a drive unit (AT) connected to the clip unit, is characterized by the following features: the clip transporting unit (KT) or the clip unit (KL) and/or the drive unit (AT) has, for example, a volume or weight fraction of at least 60% that consists of a forged part (ST) and/or is composed of a forging blank (SR).
An improved guide rail in particular for a transport device or stretching unit is distinguished inter alia by the following features – the cooling device (KA) comprises at least one cooling duct (K1, K2) which extends in a zigzag shape inside the guide rail (15) and which is formed by connected transverse bores (154a – 154d), and/or – the guide rail comprises at least two half-shells or halves (15.1, 15.2) between which a flexible tube (154) is arranged in a sandwich-like manner to form at least one cooling duct (K1, K2), and/or – at least one cooling duct (K3) is arranged outside the guide rail (15) so as to extend parallel thereto, and, in the longitudinal direction (LX) of the guide rail (15), in each case bores (157) extending transversely thereto are made, into which bores outwardly projecting heat lines (181) and/or heat pipes (182) are inserted.
B29C 55/08 - Façonnage par étirage, p. ex. étirage à travers une matriceAppareils à cet effet de plaques ou de feuilles suivant un seul axe, p. ex. étirage oblique coupant la direction d'alimentation
20.
LINEAR-MOTOR-DRIVEN CONVEYING SYSTEM, IN PARTICULAR STRETCHING SYSTEM
An improved linear-motor-operated conveying system is distinguished, inter alia, by the following features: the conveyed web (F) can be fixed to the nipper part (6), as a result of which a conveyed web plane (FE) is defined, said film plane (FE) being arranged at a height (H) with respect to the motor working side (MA) of the single linear motor drive or of the more powerful linear motor drive in the case of two linear motor drives, and said height (H) being less than or equal to the length (L) of the secondary parts (503) on the conveying parts (7); the conveying system comprises either a) only one linear motor drive provided beneath the conveying part (7), or b) only one linear motor drive provided above the conveying part (7), or c) one linear motor drive arranged beneath and one arranged above the conveying part (7), the upper linear motor drive and/or the associated control system being configured in such a manner that the upper linear motor drive can only be operated with a maximum power of 75% in relation to the maximum power of the lower linear motor drive.
An improved device for degassing polymer melts is characterised by, inter alia, the following features: the at least one vacuum separator (15; 15a, 15b) comprises cooling pipes (45) extending parallel to each other in the tank interior (115c) of the vacuum separator housing (115), the cooling pipes (45) are double-walled, the cooling pipes (45) end at a distance (H) above a collection chamber (57) or above the tank bottom (115d) of the vacuum separator housing (115), and a cleaning device (RV) having a scraper or a wiper (61) is provided, said cleaning device being adapted to the cross-sectional shape of the cooling pipes (45) and preferably to the course of the inner wall of the vacuum separator housing (115) and being movable at least in a partial height at least to the lower end of the cooling pipes.
The invention relates to an improved stretching unit characterised, amongst other things by the following: the clip-chain unit (KK) is designed such that the forces which are exerted are decoupled and applied in a tilting-free and torque-free manner to the clip-chain unit (KK) in order to prevent an increase of the surface pressure between the clip-chain unit (KK) and the supporting rail (17).
The invention relates to an improved transport system, in particular for a stretching system, characterized amongst other things, by the following characteristics: a support rail (17) and/or a guide rail (15), over which a conveyor chain (13) with clip chain units (KK) can be displaced, are provided, said units subdividing into a clip part (6) and a chain part (7), said support rail (17) or the guide rail (15) or the support rail and the guide rail (17, 14) is/are provided with a channel (122) which transverses in the longitudinal direction at least in one of the partial lengths of the support rail (17) and the guide rail (15). The support rail running surface (17a) comprises a plurality of outlet openings (122') through which the compressed air can be guided on the channel (122) for generating an airbag (130) between the support rail running surface (17a) and an air bearing cushion plate (140) on the clip-chain unit (KK) and/or the running rail running surfaces (31a, 31b) comprise a plurality of outlet openings (122') through which the compressed air can be guided on the channel (122) by generating an air bag (130) between the respective guide rail running surfaces (31a, 33a) and a bearing device (139) on the clip chain unit (KK).
The invention relates to an improved clip/transport unit, characterized by the following features, among others: the clip/transport unit (KT) is divided into a clip part (6) and a transport part (7), the clip/transport unit (KT) has a volume or weight fraction of at least 25% composed of one or more composite materials.
The invention relates to an improved ventilation nozzle, in particular for heating web-shaped materials (3), comprising a supply chamber (17) and a distribution chamber arrangement (19), which is connected to the supply chamber (17) via an overflow arrangement. An improvement can be achieved in that in the ventilation nozzle (9) at least one temperature-control section (35) extending in the longitudinal direction (L) of the ventilation nozzle is provided with an integrated heating device (35a).
B29C 55/08 - Façonnage par étirage, p. ex. étirage à travers une matriceAppareils à cet effet de plaques ou de feuilles suivant un seul axe, p. ex. étirage oblique coupant la direction d'alimentation
B29C 55/16 - Étirage suivant plusieurs axes suivant deux axes simultanément
B29C 35/04 - Chauffage ou durcissement, p. ex. réticulation ou vulcanisation avec des liquides, des gaz ou de la vapeur d'eau
Disclosed is an improved multiple-screw extruder, in particular a twin-screw extruder, which is characterized by the following features: - the extruder comprises a housing (3); - several housing bores are located in at least one section within the housing (3); - the housing bores overlap at least along a partial axial length of the housing (3); - one extruder screw (5a, 5b) is arranged in each of the several housing bores; - at least two motors (M1, M2) are provided for the at least two extruder screws (5a, 5b); and - a synchronizing and torsion transmitting device (35, 36), by means of which both cooperating extruder screws (5a, 5b) can be synchronized, is provided on both the inlet side (25a) and the discharge side (25b).
An improved drawing unit, particularly longitudinal or sequential longitudinal and transversal or simultaneous drawing unit is characterized by the following characteristics: A drive system (AS) is provided, via which the nippers (3) of the nipper system (KS) can be driven, the nipper system (KS) with the associated nippers (3) is separated from the drive system (AS) to form a separation point and/or interface (IF), the drive system (AS) is provided with primary coupling devices (pKE) on the drive side, the nippers (3) are provided with secondary coupling devices (sKE), the driven primary coupling devices (pKE) associated with the drive system (AS) can be coupled to the respective secondary coupling element (sKE) provided on a nipper system (KS), and - the coupling and/or the degree of the coupling between the primary coupling device (pKE) on the drive side and the nippers (3) provided with a secondary coupling device (sKE) can be set differently.
An improved method and an improved apparatus for measuring birefringence and/or retardation on samples (3) are distinguished, inter alia, by the following measures: with a radiation arrangement having at least one light source (LQ1, LQ2) or having at least two light sources (LQ1, LQ2) for generating two light beams (LS1, LS2; LS1_1, LS1_2; LS2_1, LS2_2) - provision is made of a polarization-maintaining diffractive element (DO; DO1, DO2) and a detector device (9; 9a, 9b) with polarization-sensitive analysers (A; A1, A2; 19), which can be used to measure the intensity of the diffraction structure sample (BM) generated by the component beams.
An improved roll is characterized in that it is subdivided into three zones at leas in the axial direction, namely two peripheral zones (A, B) and a middle zone (C) located therebetween. The peripheral zones have a metallic protective layer that is welded onto the roll base body and is provided in the form of a protective metal sheet. A flame-sprayed surface is used in the middle zone (C).
C23C 4/12 - Revêtement par pulvérisation du matériau de revêtement à l'état fondu, p. ex. par pulvérisation à l'aide d'une flamme, d'un plasma ou d'une décharge électrique caractérisé par le procédé de pulvérisation
C23C 4/10 - Oxydes, borures, carbures, nitrures ou siliciuresLeurs mélanges
Barrier film for use in packaging, particularly for the packaging of foods and tobacco, in the form of a multi-layer film based on a biaxially oriented polyolefin film having at least one coextruded functional layer or barrier based on ethylene-vinyl alcohol copolymers (EVOH), which is produced by simultaneous drawing of a coextruded multi-layer primary film at temperatures of 145°C and below, the ethylene content of the EVOH being below 40 mol% and the thickness of the EVOH layer being less than 5 쎽m, in particular less than 2 쎽m, thereby producing values for the oxygen permeability at 23°C and 75% relative humidity (OTR; ASTM 3985) of better than 10 cm3/m2dbar, preferably better than 5 cm3/m2dbar.
B32B 27/32 - Produits stratifiés composés essentiellement de résine synthétique comprenant des polyoléfines
B32B 27/08 - Produits stratifiés composés essentiellement de résine synthétique comme seul composant ou composant principal d'une couche adjacente à une autre couche d'une substance spécifique d'une résine synthétique d'une sorte différente
B65D 65/40 - Emploi de stratifiés pour des buts particuliers d'emballage
B29C 55/16 - Étirage suivant plusieurs axes suivant deux axes simultanément
31.
HIGH-STRENGTH POLYPROPYLENE-BASE BARRIER FILM FOR PACKING PURPOSES, METHOD FOR THE PRODUCTION AND THE USE THEREOF
The invention relates to a high-strength and brilliant quality barrier film for packing purposes, in particular for food packaging embodied in the form of a multilayer film based on of at least one carrier layer consisting of a biaxially oriented polypropylene film (PP-film) and of a functional layer based on amorphous and partially-crystalline polyamide (PA) which is produced by simultaneously stretching a primary multilayer coextruded film, wherein said polyamide functional layer consists of an external film layer and a central internal layer placed between two carrier layers. Methods for the production of the inventive film and the uses thereof are also disclosed.
brevets
