Abstract: Disclosed are capacitors containing as dielectric a biaxially oriented film comprising a mixture of polypropylene and cycloolefin polymer, the proportion of cycloolefin polymer in the mixture being between 3 and 18% by weight. These capacitors are characterized by high temperature resistance and high dielectric strength at room temperature.

Abstract: A polyolefin composition is described which comprises poly-(alpha-olefin) and 10 to 45% by weight, based on the total weight of the composition, of cycloolefin polymer having a glass transition temperature of at least 30° C. This polyolefin composition has domains of cycloolefin polymer in a matrix of poly-(alpha-olefin) in the form of plates. These polyolefin compositions and the moulded articles made therefrom exhibit excellent barrier properties to gases and vapors and excellent dielectric properties.

Abstract: Disclosed are biaxially stretched polyolefin films containing a) 10 to 45% by weight of a cycloolefin polymer with a glass transition temperature between 120 and 170° C., and b) 90 to 55% by weight of a semi-crystalline alpha-olefin polymer with a crystallite melting temperature between 150 and 170° C., wherein the glass transition temperature of component a) being less than or equal to the crystallite melting temperature of component b), and wherein the polyolefin film has a shrinkage at 130° C. after 5 minutes, as measured according to ISO 11501, of less than or equal to 2%. These polyolefin films are excellent suited as dielectrics for capacitors but also for other applications and are distinguished by a low shrinkage at high temperatures.

Abstract: The invention relates to selected polymer blends which can be used for production of films or sheets having reduced defects, and also to a process for preparation of the polymer blends.

Abstract: The invention relates to selected polymer blends which can be used for production of films or sheets having reduced defects, and also to a process for preparation of the polymer blends.

Abstract: The invention relates to a sealable, multilayer, coextruded packaging film with high transparency and high tensile strength. The film is composed of at least one core layer A made from a polyolefin with high tensile strength together with low elongation, and of outer layers B and C arranged on the two sides. The core layer A comprises from 50 to 100 % by weight of cyclic olefin polymer (COC) having a Tg of at least 60 ° C. The outer layers B and C may comprise at least one sealable polymer and one functional polymer. Intermediate layers may be arranged between layer A and layers B and C improving adhesion between layers. This film has a total thickness in the range from 20 to 200 ?m, the core layer A making up from 5 to 60% of the total thickness of the film. The film is used in “flow-pack” packages produced on form-fill seal machines, or as a cover film on thermoformed blister packages or on cups (lidding).

Abstract: The invention relates to a multilayer polyolefin film composed of at least three layers, comprising a) a core layer A functioning as base layer and composed of at least one amorphous polyolefin or of a mixture of at least one semicrystalline polyolefin and 5.0% by weight or more of at least one amorphous polyolefin and b) on the two sides, outer layers B and C, which are identical or different, composed of a polyolefin (polyethylene, polypropylene) and/or a mixture composed of polypropylene and of an amorphous polyolefin. The films of the invention have very good thermoformability together with low shrinkage. The chemical structure of the core layer A gives exceptionally low water absorption and superior barrier action with respect to water vapor. The invention further relates to the use of this film and to a process for its production.

Abstract: A multi-layer laminate comprising at least one layer of fiber material and at least one layer of plastic laminated thereto, which plastic layer comprises at least 50 weight percent of a cycloolefin copolymer. Also disclosed are packaging materials and packages made from the multi-layer laminate.

Abstract: The present invention relates to a process for reducing the toughness of moldings made from plastic, which comprises melting and mixing at least one semicrystalline polymer and at least one amorphous polyolefin in a heatable mixing assembly, processing the resultant mixture to give a polymer molding composition, and processing the polymer molding composition to give moldings. The moldings have improved machining properties.

Abstract: The present invention describes a novel transparent polymer mixture with modified relaxation behavior and modified shrinkage behavior, comprising cycloolefin polymers. The polymer mixture comprises at least one amorphous polyolefin. The polymer mixture is used to produce mono- or biaxially oriented films, blister packs, or mixtures with other plastics, particularly with polyolefins. The polymer mixture is used in injection molding, injection blow molding or blow extrusion.

Abstract: A multi-layer laminate comprising at least one layer of fiber material and at least one layer of plastic laminated thereto, which plastic layer comprises at least 50 weight percent of a cycloolefin copolymer. Also disclosed are packaging materials and packages made from the multi-layer laminate.

Abstract: The present invention describes a novel transparent polymer mixture with modified relaxation behavior and modified shrinkage behavior, comprising cycloolefin polymers. The polymer mixture comprises at least one amorphous polyolefin. The polymer mixture is used to produce mono- or biaxially oriented films, blister packs, or mixtures with other plastics, particularly with polyolefins. The polymer mixture is used in injection molding, injection blow molding or blow extrusion.

Abstract: The invention relates to a biaxially oriented polyester film which has three layers and which, together with very good electromagnetic properties compared with prior art films, has improved abrasion properties. The two sides of the film are built up from at least one base layer B and, applied to this base layer, outer layers A and C, where these outer layers have a defined number of elevations of defined height. The invention also relates to a process for producing the film and to its use as magnetic tape film.

Abstract: The invention relates to a three-layer, biaxially oriented polyester film which has very good electromagnetic properties compared with films of the prior art in combination with improved abrasion properties. The film is composed of at least one base layer B and outer layers A and C applied to both sides of this base layer, these outer layers having a defined number of protuberances with a defined height and having a defined gas flow in the roughness profile. The invention furthermore relates to a process for the production of the film and its use as magnetic tape film in which no backing coating is applied.