Hoechst Aktiengesellschaft

Hoechstaktiengesellschaft

Peter Dinter

John D Gribbin

Lothar Bothe

Andreas Kolbe

Hermann Dallmann

Hermann Funke

Klaus Matschke

Guenther Crass

Jochen Coutandin

Hartmut Hensel

Walter Seifried

Klaus Paschke

Klaus J Gleffe

Bernd Spross

Theo Grosse-Kreul

Joachim Nowotnick

Reinhold Guckes

The packaging container according to the invention for receiving filled product can be used as a self-supporting container or as an in-liner or insert container in supporting outer containers such as corrugated paperboard boxes, wooden cases, box pallets with mesh panels, or drums. The packaging container comprises a multilayered composite film combination which is made up of a polymer film with barrier layer properties, acting as the outer layer of the container, an intermediate layer made of an electrically conductive material and also a further polymer film, forming the inner layer of the packaging container. According to the invention, the further polymer film, forming the inner layer of the packaging container, bears a perforation pattern and the electrically conductive intermediate layer is in connection with a grounding system via electric contact points. The polymer film forming the inner layer of the packaging container is preferably a heat-sealable monofilm or a coextruded film.

Plastic packaging container with improved ability for electrostatic

A self-supporting sheet-like structure is described, which contains a substrate layer and a structured coating on at least one surface of the substrate layer. The structured coating is produced by treating at least one surface of the substrate layer by means of an electric corona discharge, which takes place between a high voltage electrode and a grounded counter-electrode. In this procedure, an aerosol containing discrete inert particles is simultaneously introduced into the corona discharge space during the corona discharge to improve the slip characteristics and reduce friction of the substrate layer.

Self-supporting sheet-like structure having at least one structured

A packaging system for a film roll containing, inter alia, a highly sensitive film web is disclosed. The system is made up of at least two end walls, with centrally arranged cylindrical plug-on protuberances or centering protuberances for receiving the winding sleeve which bears the film web, and are connected in a releasible, but sealing manner to the end walls via tensioning elements and sealing elements. The system further includes an inner winding sleeve and an outer protective sleeve, and thus, together with the end walls, sealing elements and tensioning elements, forms a closed packaging around the film roll.

Packaging system for receiving a film web wound up in roll form onto a

In the production of moldings from thermotropic, liquid-crystalline plastics, the chains of the LC polymer molecules are oriented in at least two preferred directions independent of one another. For this purpose, the polymer melt stream which emerges from an extruder is divided into two part streams which are fed via melt lines to an adapter. A distributing element which is caused to rotate by a drive unit is located in the adapter. The adapter is upstream of a slot die and is connected to the latter. One part stream forms a polymer matrix while the other part stream incorporates in, or is superimposed on, this polymer matrix individual polymer strands at different cross-sectional levels by the rotating distributing element. These polymer strands reinforce the polymer matrix. These polymer strands form multiple-pitch helices. The two part streams combined in the adapter enter the slot die and are shaped in the latter to give a multilayer melt film which is extruded through the slot die onto a cooling roller.

Apparatus for the production of moldings from thermotropic,

A polymeric sheet structure consists of an adhesion-promoting coating on at least one surface of the substrate. The adhesion-improving coating is produced by treating this substrate surface with an electrical corona discharge between high voltage electrodes and a grounded counter-electrode while simultaneously spraying an aerosol into the corona discharge zone. The aerosol contains, for example, an aqueous emulsion of thermoplastic and/or crosslinkable components as an adhesion-promoting agent.

Process for passing a hydrophobic substrate through a corona discharge

The biaxially stretch oriented, corona-treated polyester film, in particular polyethylene terephthalate film, is suitable as a base film for magnetic coatings. It exhibits the following features: at least one of its two surfaces exhibits a surface tension of at least 43 mN/m without an adhesion promoter having been added; the modulus of elasticity in the machine direction and/or transverse direction is greater than 5800 N/mm.sup.2 ; and the refractive index perpendicular to the film plane is less than or equal to 1.4900.

Polyester film having improved adhesion properties

An apparatus for the continuous production of composite laminate bodies including panels and cylindrical pipes comprises a frame, a laminating mold, a sheet supply roller, a movable pressure roller, at least two preheating rollers and a heating device, wherein the pressure roller, preheating roller and heating device are mounted on the frame, the laminating mold is movable and is adjacent to the frame to form a laminating gap, and the heating device is provided near the laminating gap, so that the sheet travels from the sheet supply roller to the preheating rollers and then to the laminating gap where the sealing material on the sheet surface is heat melted just before being pressed against the laminating mold. By successive lamination of layers of sheet material over the last sheet of material or last section of film by selectively melting the sealing coating on the contact surface of the sheet of material with the heating device just prior to pressing the sheet of material against the laminating mold, an improved composite body having the desired level of thickness with improved load bearing capacity is obtained with increased time efficiency and substantial reductions in potential damages to the product. A process for producing composite bodies from layers of laminated sheets is also disclosed.

Apparatus for producing composite bodies from layers of plastic flim

A self-supporting sheet-like structure comprises a coating, which reduces sliding friction, on at least one surface of the substrate. The slip-improving coating is produced by treating this substrate surface by means of an electric corona discharge between a high voltage electrode and a grounded counter-electrode while simultaneously spraying an aerosol into the corona discharge zone. The aerosol contains a film-forming agent as a slip agent, for example aqueous solutions or emulsions of monoesters of glycerol and long-chain fatty acids.

Self-supporting sheet-like structure comprising a substrate and a

In the production of moldings from thermotropic, liquid-crystalline plastics, the chains of the LC polymer molecules are oriented in at least two preferred directions independent of one another. For this purpose, the polymer melt stream which emerges from an extruder is divided into two part streams which are fed via melt lines to an adapter. A distributing element which is caused to rotate by a drive unit is located in the adapter. The adapter is upstream of a slot die and is connected to the latter. One part stream forms a polymer matrix while the other part stream incorporates in, or is superimposed on, this polymer matrix individual polymer strands at different cross-sectional levels by means of the rotating distributing element. These polymer strands reinforce the polymer matrix. These polymer strands form multiple-pitch helices. The two part streams combined in the adapter enter the slot die and are shaped in the latter to give a multilayer melt film which is extruded through the slot die onto a cooling roller.

Process for the production of moldings from thermotropic,

The process of the present invention is for the surface treatment on both sides of a substrate by means of electric corona discharge, while simultaneously treating both surfaces of the substrate with a carrier gas/aerosol mixture introduced into the corona discharge zone. The arrangement for carrying out this process comprises a corona discharge device, consisting of a generator, high voltage electrodes, to which alternating current is applied by the generator, as well as grounded counter electrodes, a device for the atomization of liquid into a suspendable aerosol, which is connected via a transport line for the aerosol to the corona discharge device, and a blower, which is connected to the atomizer device and conveys the carrier gas/aerosol mixture to the corona discharge device. The electrodes and counter electrodes together form a gap for the substrate to be treated.

Process and apparatus for the surface treatment of sheet-like structures

Moldings having a thickness of 1 to 60 mm and made of flexible webs or rigid sheet of plastic are passed through a corona discharge treatment system consisting of high-voltage electrodes and a counter-electrode and a high-frequency alternating current voltage of 20 to 25 kHz and 20 to 70 kV is applied to the high-voltage electrodes by a generator. A corona discharge forms in the gap between the high-voltage electrodes and the counter-electrode. An aerosol formed by atomizing a liquid is blown into the corona discharge zone by means of an air or gas stream. The aerosol modifies the surface of the sheet-like molding in the desired manner.

Process and apparatus for preparing the surface of a plastic molding by

Apparatus for the surface treatment of sheet-like structures by electric

A self-supporting sheet-like article is described which is comprised of a substrate layer and an antistatic coating applied to at least one surface of the substrate layer. The antistatic coating is produced by the treatment of at least one surface of the substrate layer with an electrical corona discharge which runs between a live electrode and a counter electrode. Simultaneously, i.e. during the corona discharge, an aerosol is introduced into the corona discharge area, which aerosol contains an antistatic agent. Furthermore, a procedure for the production of a self-supporting sheet-like article with an antistatic coating as well as a firmly adhering antistatic coating on a polymer substrate are described.

Self-supporting sheet-like article with superior antistatic

A sheet-like structure consists of an adhesion-promoting coating on at least one surface of the substrate. The adhesion-improving coating is produced by treating this substrate surface with an electrical corona discharge between high voltage electrodes and a grounded counter-electrode while simultaneously spraying an aerosol into the corona discharge zone. The aerosol contains, for example, an aqueous emulsion of thermoplastic and/or crosslinkable components as an adhesion-promoting agent.

Sheet-like structure consisting of a substrate and a coating

The high-strength panel-type article is composed of a plurality of superposed films of thermoplastic material firmly bonded to one another. At least one surface of the article has a plurality of individual elevations, the article being thicker in these areas of this surface and the individual films not being bonded to one another in these areas.

Growing community of inventors

Oestrich-Winkel, Germany

Peter Dinter