Abstract: The invention relates to a coextruded, transparent, biaxially oriented polyester film having at least three layers, with at least one base layer B, at least 80% by weight of which is composed of a thermoplastic polyester, where an outer layer has been applied to each surface of this base layer, and where at least one outer layer comprises particles, wherein the gloss of both surfaces of the film is above 170 the haze of the film is below 2.4% the planar orientation &Dgr;p of the film is below 0.162. the coefficient of friction (COF) is below 0.6. The invention further relates to the use of a film of this type, and also its production.

Abstract: The invention relates to a transparent, biaxially oriented polyester film with a base layer B, at least 80% by weight of which is composed of a thermoplastic polyester, and with at least one outer layer A. The outer layer A is composed of a copolymer or a mixture of polymers/copolymers which contains ethylene 2,6-naphthalate units in a range of from 90 to 98% by weight and up to 10% by weight of ethylene terephthalate units, and/or units derived from cycloaliphatic or aromatic diols and/or dicarboxylic acids. Its thickness is more than 0.7 &mgr;m and makes up less than 25% by weight of the total film and the Tg2 value of the polyester film is above the Tg2 value of the base layer, but below the Tg2 value of the polyester for the outer layer. The transparent film has low permeability to atmospheric oxygen and exhibits very good adhesion between the individual layers. It is particularly suitable for packaging purposes, specifically for packaging foods or other consumable items.

Abstract: The invention relates to a biaxially oriented polypropylene film which has good processing performance and, after it has been metallized or oxidically coated, is a very good barrier to oxygen, and which is composed of at least a base layer, wherein the planar orientation delta p of the film is greater than 0.0138.

Abstract: The disclosed biaxially oriented, multilayer polypropylene film comprises at least one base layer B, one interlayer Z and one top layer D and contains migrating additives. The film contains a maximum of 0.15% by weight of migrating additives, based on the total weight of the film. The multilayer film structure is produced by coextrusion and biaxial stretching followed by heat-setting and, optionally, corona treatment. The film is particularly useful in packaging and in laminates.

Abstract: The invention relates to a biaxially oriented polyester film having at least one matt side and composed of at least one base layer (B) made from a thermoplastic polyester and of, applied to this base layer (B), at least one matt outer layer (A) which comprises at least 70% by weight of thermoplastic polyester. The outer layer (A) has a characteristic matt surface and characteristic optical properties and has good suitability for use as a packaging film or for industrial application. The invention further relates to the use and to a process for its production.

Abstract: The invention relates to a biaxially oriented polyester film having at least one matt side and composed of at least one base layer (B) and of, applied to this base layer, at least one matt outer layer (A) which comprises at least 70% by weight of thermoplastic polyester and also to a pigment system with narrow grain size distribution. The invention further relates to the use of the film and to a process for its production. The film of the invention with the outer layer (A) has a characteristic matt surface and characteristic optical properties and has good suitability for use as a packaging film or for industrial applications.

Abstract: The invention relates to a matt, biaxially oriented polyester film having at least one matt base layer (B) which comprises at least 70% by weight of thermoplastic polyester, and also a pigment system with narrow grain size distribution. The invention further relates to the use of the film and to a process for its production. The film of the invention has characteristic matt surfaces and has good suitability for use as a packaging film or for industrial applications.

Abstract: The application discloses the use of a transparent, biaxially oriented polyester film having a base layer at least 80% by weight of which is composed of a thermoplastic polyester, and having at least one outer layer, where the outer layer is composed of a polymer or of a mixture of polymers which comprises at least 40% by weight of ethylene 2,6-naphthalate units and up to 60% by weight of ethylene terephthalate units and/or units from cycloaliphatic or aromatic diols and/or dicarboxylic acids, with the proviso that the Tg2 value of the polymer film is above the Tg2 value of the base layer but below the Tg2 value of the outer layer, has a barrier film with respect to the gases H2O, N2, CO2, He and flavors. It is particularly suitable for packaging applications, specifically for packaging foods and other consumable items.

Abstract: The application discloses a sealable biaxially oriented polyester film having a base layer B at least 80% by weight of which is composed of a thermoplastic polyester, and having two outer layers A and C, wherein the outer layer A is composed of a polymer or of a mixture of polymers which comprises at least 40% by weight of ethylene 2,6-naphthalate units and up to 60% by weight of ethylene terephthalate units and/or units from cycloaliphatic or aromatic diols and/or dicarboxylic acids, and the opposite outer layer C is sealable and has a sealing initialization temperature of from about 100 to 200° C. The film has low atmospheric oxygen transmission. It is particularly suitable for packaging applications, specifically for packaging foods and other consumable items.

Abstract: The invention describes a biaxially oriented polyester film with at least one base layer B. with at least one metal-adherent outer layer A, and preferably with another outer layer C, the metal-adherent outer layer A having a metal adhesion of at least 4 N/25 mm.

Abstract: The invention relates to a biaxially oriented polyester film having at least two layers and which, together with good processing performance, after it has been metalized or has been coated with oxidic materials, is a very good gas or oxygen barrier, and which has been built up from at least one base layer and at least one outer layer applied to this base layer, where the film has a planar orientation &Dgr;p of greater than 0.165.

Abstract: The invention relates to a coextruded, transparent, biaxially oriented polyester film having at least three layers, with at least one base layer B, at least 80% by weight of which is composed of a thermoplastic polyester, where an outer layer has been applied to each surface of this base layer, and where at least one outer layer comprises particles, wherein

Abstract: A metalized or ceramic-coated biaxially oriented polyester film is disclosed, with a base layer B which comprises at least 80% by weight of thermoplastic polyester, and with at least one outer layer A. The outer layer A is composed of a copolymer or of a mixture of polymers/copolymers which contains from 90 to 98% by weight of ethylene 2,6-naphthalate units and up to 10% by weight of ethylene terephthalate units, and/or units derived from cycloaliphatic or aromatic diols and/or dicarboxylic acids. The thickness of the outer layer A is more than 0.7 &mgr;m and this makes up less than 25% by weight relative to the entire film. The Tg2 value of the polyester film is above the Tg2 value of the base layer, but below the Tg2 value of the outer layer. The film has low permeability to atmospheric oxygen and exhibits very good adhesion between the individual layers. It is particularly suitable for packaging purposes, specifically for packaging foods or other consumable items.

Abstract: A transparent, biaxially oriented polyester film is disclosed, with a base layer B which comprises at least 80% by weight of thermoplastic polyester, and with at least one intermediate layer Z, and with at least one outer layer A. The outer layer A is composed of a polymer or of a mixture of polymers which contains at least 85% by weight of ethylene 2,6-naphthalate units and up to 15% by weight of ethylene terephthalate units, and/or up to 15% by weight of units derived from cycloaliphatic or aromatic diols and/or dicarboxylic acids, and the intermediate layer Z is composed of a mixture of polymers which contains at least 3% by weight of ethylene 2,6-naphthalate units and up to 97% by weight of ethylene terephthalate units, and/or up to 97% by weight of units derived from cycloaliphatic or aromatic diols and/or dicarboxylic acids. The Tg2 value of the polyester film is above the Tg2 value of the base layer B, but below the Tg2 value of the outer layer A.

Abstract: A multiple-pack system composed of a combined pack made from individual packages, where the individual packaging takes place in a biaxially stretch-oriented polypropylene film with modified polyolefinic sealable layers. The characterizing features of the multiple-pack system are that the combined-pack film is composed of a sealable, biaxially stretch-oriented coextruded polyester film having more than one layer, where the sealable outer layer(s) comprise(s) copolyester. In the novel multiple-packed system, the combined-pack film is sealable with itself, but does not seal to the biaxially oriented polypropylene films of the individual packages.

Abstract: The invention relates to a biaxially oriented polyester film with a base layer at least 80% by weight of which is composed of a thermoplastic polyester, and with at least one matte outer layer which comprises a mixture or a blend of two components I and II wherein components I and II render the at least one outer layer matte. The invention further relates to the methods for use of the film and to a process for its production. Component I of the mixture or of the blend is a polyethylene terephthalate homopolymer or polyethylene terephthalate copolymer or a mixture of homo- or copolymers. Component II of the mixture or of the blend is a polyethylene terephthalate copolymer which is composed of the condensation product of the following monomers and/or of their derivatives capable of forming polyesters: isophthalic acid, aliphatic dicarboxylic acid, sulfomonomers and aliphatic or cycloaliphatic glycols.

Abstract: A single-ply or laminar biaxially oriented polypropylene film structure is described. The n-hexane-insoluble fraction of the film has a chain isotaxy index, measured by means of 13C-NMR spectroscopy, of at least 95%. The base ply of the laminar structure (or the single ply of the single-ply structure) contains essentially no hydrocarbon resin or low molecular weight resin. The modulus of elasticity of the film structure in the longitudinal direction is greater than 2,500 N/mm2. The modulus of elasticity of the film structure in the transverse direction is greater than 4,00 N/mm2.

Abstract: The application discloses a sealable biaxially oriented polyester film having a base layer B at least 80% by weight of which is composed of a thermoplastic polyester, and having two outer layers A and C, wherein the outer layer A is composed of a polymer or of a mixture of polymers which comprises at least 40% by weight of ethylene 2,6-naphthalate units and up to 60% by weight of ethylene terephthalate units and/or units from cycloaliphatic or aromatic diols and/or dicarboxylic acids, and the opposite outer layer C is sealable and has a sealing initialization temperature of from about 100 to 200° C. The film has low atmospheric oxygen transmission. It is particularly suitable for packaging applications, specifically for packaging foods and other consumable items.

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.

Abstract: The present invention relates to a milkily translucent, biaxially oriented polyester film with at least a base layer which comprises up to 5% by weight of a cycloolefin copolymer (COC), based on the weight of the base layer, the glass transition temperature of the COC being within the range from 70 to 270° C. The film of the invention is suitable for packing foods or other consumable items which are sensitive to light and/or to air, or for use in industry, e.g. for producing hot-stamping foils or as a label film, or for image-recording papers, printed sheets, or magnetic recording cards, or for metallization.