Abstract: The invention relates to a biaxially oriented polyester film which has very good optical properties and good processing behavior and which after it has been metallized or coated with oxidic materials exhibits a high oxygen barrier and which is built up from at least one base layer B and at least one layer A applied on top of this base layer, this layer A having a defined number of elevations of defined height and diameter. The invention also relates to the use of the film and a process for the production thereof.

Abstract: The invention relates to a biaxially oriented, sealable polyester film with at least a base layer (B), with a sealable outer layer (A) and with another, nonsealable outer layer (C), where the sealable outer layer (A) has a minimum sealing temperature of not more than 110° C. and a seal seam strength of at least 1.3 N/15 mm of film width, and the topographies of the two outer layers (A) and (C) have particular characterizing features. The film of the invention is particularly suitable for use in flexible packaging and specifically in particular for use on high-speed packaging machinery.

Abstract: The present application relates to a white, biaxially oriented, UV-resistant polyester film with at least one base layer which comprises, based on the weight of the base layer, from 2 to 60% by weight of a cycloolefin copolymer (COC), where the glass transition temperature of the COC is within the range from 70 to 270° C. The film also comprises from 0.01 to 5.0% by weight of a UV stabilizer as light stabilizer, based on the weight of the base layer. 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. in the production of hot-stamping foils or as a label film, or for image-recording papers, printed sheets or magnetic recording cards.

Abstract: The present application relates to a white, biaxially oriented, flame-retardant, UV-resistant polyester film with at least one base layer which comprises, based on the weight of the base layer, from 2 to 60% by weight of a cycloolefin copolymer (COC), where the glass transition temperature of the COC is within the range from 70 to 270° C. The film also comprises from 0.01 to 5.0% by weight of a UV stabilizer as light stabilizer and also comprises from 0.5 to 30% by weight of flame retardant, based in each case on the weight of the layer comprising the UV stabilizer and/or comprising the flame retardant. 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. in the production of hot-stamping foils or as a label film, or for image-recording papers, printed sheets or magnetic recording cards.

Abstract: The invention relates to a biaxially oriented polyester film which has at least three layers and has better optical properties than films of the prior art together with very good processing performance, and, after it is metalized or coated with oxidic materials, is a good barrier to oxygen, and which is built up on each side from at least one base layer B and outer layers A and C applied to this base layer, where these outer layers have a defined number of elevations of a defined height and diameter. The invention further relates to the use of the film and to a process for the production thereof.

Abstract: The invention relates to a biaxially oriented polypropylene film which has very good optical properties and good processing performance and which, after it has been metallized or has been coated with oxidic materials, has a high oxygen barrier value, and whose structure has at least one base layer B and at least one layer A applied to this base layer, where this layer A has a specified number of elevations of specified height and specified diameter. The invention further relates to the use of the film and to a process for its production.

Abstract: The invention relates to a single-layer biaxially oriented polyester film which, together with good processing performance, after it has been metalized or has been coated with oxidic materials, has very good gas or oxygen barrier properties, and which has been built up from one base layer, where the film has a planar orientation &Dgr;p of greater than 0.166. For at least one surface of the film, the number N of elevations per mm2, the height n in &mgr;m, and the diameter d in &mgr;m of the elevations are linked by the following equations: - 1 - 3.7 * log ⁢   ⁢ h / μm < log · N / mm 2 < 2.48 - 2.

Abstract: The invention relates to a biaxially oriented polyester film which, after metallization, has low oxygen permeation and good adhesion to the metallization, and is composed of at least one base layer B and, applied to this base layer, at least one layer A, where this layer A i) has, per mm2 of film surface, a number N of elevations whose respective heights h and diameters d are correlated by the following equations: log N/mm2<Ah−Bh*log h/&mgr;m, 0.05 &mgr;m<h<1.0 &mgr;m  (1) wherein Ah=1.4; Bh=2.5 log N/mm2<Ad−Bd*log d/&mgr;m, 0.2 &mgr;m<d<10.0 &mgr;m  (2) wherein Ad=3.4; Bd=2.4 and ii) has a copolyester coating derived from isophthalic acid and a sulfomonomer.

Abstract: The application discloses 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, wherein the outer layer is composed of a copolymer or of a mixture of polymers which comprises at least 35 mol % of ethylene 2,6-naphthalate units, up to 44 mol % of ethylene terephthalate units, and from 1 to 20 mol % of ethylene isophthalate units, and also up to 20 mol % of a sulfo-substituted dicarboxylic acid and, if desired, up to 10 mol % of units from aliphatic, including cycloaliphatic, or aromatic diols and/or dicarboxylic acids (based in each case on the total content of dicarboxylic acid or diol).

Abstract: The invention relates to a metallized or ceramically coated, biaxially oriented polyester film with high oxygen barrier and built up from at least one base layer B and, applied to this base layer, at least one outer layer A, where this outer layer A has a defined number of elevations of defined height and diameter, and where at least this outer layer A is metallized or ceramically coated. The invention also relates to the use of the film and to a process for its production.

Abstract: The application discloses 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, wherein the outer layer is composed of a polymer or 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 of units from aliphatic, including cycloaliphatic, or aromatic diols and/or dicarboxylic acids, with the proviso that the T.sub.g 2 value of the polyester film is above the T.sub.g 2 value of the base layer but below the T.sub.g 2 value of the outer layer, and the base layer comprises particles. The film has low oxygen transmission. It is particularly suitable for packaging applications, specifically for packaging foods and other consumable items, or as a can liner, a lid film or a thermo-transfer ribbon.

Abstract: A biaxially oriented polypropylene film is described. The n-heptane-insoluble content of the film has a chain isotactic index, measured by .sup.13 C-NMR spectroscopy, of at least 97%. In addition, a process for the production of the polypropylene film and the use of the film are described.

Abstract: A biaxially oriented polypropylene film is described. The base ply of the film essentially consists of a polypropylene prepared by means of a metallocene catalyst. This polypropylene is distinguished by a mean isotactic block length of greater than 40, an n-heptane soluble fraction of less than 1% and a ratio of the weight average molecular weight M.sub.w to the number average molecular weight M.sub.n of less than 4.

Abstract: A polyolefin film which includes at least one layer containing polyolefin and cycloolefin polymer (COP), where the cycloolefin polymer is amorphous and has a mean molecular weight M.sub.w in the range from 200 to 100,000, and this mean molecular weight M.sub.w of the cycloolefin polymer is at most 50% of the mean molecular weight M.sub.w of the polyolefin, and the cycloolefin polymer is a homopolymer or a copolymer containing at most 20% by weight of comonomer.

Abstract: A biaxially oriented polypropylene film is described. The base ply of the film contains at least 90% by weight of a polypropylene prepared by means of a metallocene catalyst. This polypropylene is distinguished by a mean isotactic block length of greater than 40, an n-heptane soluble fraction of less than 1% and a ratio of the weight average molecular weight M.sub.w to the number average molecular weight M.sub.n of less than 4.

Abstract: A biaxially oriented polypropylene film is described. The base ply of the film essentially consists of a polypropylene prepared by means of a metallocene catalyst. This polypropylene is distinguished by a mean isotactic block length of greater than 40, an n-heptane soluble fraction of less than 1% and a ratio of the weight average molecular weight M.sub.w to the number average molecular weight M.sub.n of less than 4.

Abstract: A multilayer polypropylene film which includes at least one base layer containing propylene polymer or a propylene polymer mixture and resin, and at least one outer layer containing .alpha.-olefinic polymers having 2 to 10 carbon atoms is disclosed. The resin has a mean molecular weight of.gtoreq.1500. The invention also relates to a process for the production of the multilayer film, and to the use of the film in a twist wrapping process.

Abstract: The application discloses a transparent, biaxially oriented polyester film having a base layer of at least 80% by weight which is composed of at least a thermoplastic polyester, and having at least one cover layer, wherein the cover layer is composed of a polymer or a mixture of polymers which comprises at least 40% by weight of ethylene 2,6-naphthalate units and optionally up to 60% by weight of ethylene terephthalate units and/or optionally units from aliphatic, cycloaliphatic or aromatic diols, and/or optionally aliphatic, cycloaliphatic and aromatic dicarboxylic acids, with the proviso that the T.sub.g 2 value of the polyester film is above the T.sub.g 2 value of the base layer but below the T.sub.g 2 value of the cover layer. The film has low atmospheric oxygen transmission. It is particularly suitable for packaging applications, specifically for packaging foodstuffs and other consumable items.

Abstract: The invention relates to a film having more than one layer and made from cycloolefin polymers and having a base layer and at least one outer layer, the base layer being built up essentially from a cycloolefin polymer COP having a glass transition temperature Tg and the outer layer being built up essentially from a mixture of cycloolefin polymers, wherein the mixture of cycloolefin polymers comprises at least two cycloolefin polymers COP.sub.1 and COP.sub.2 whose glass transition temperatures Tg.sub.1 and Tg.sub.2 differ by at least 5.degree. C., where Tg.sub.2 -Tg.sub.1 .gtoreq.5.degree. C. and at the same time the condition Tg.sub.2 -Tg.gtoreq.5.degree. C. is fulfilled.

Abstract: The invention relates to a coextruded heat-sealable polyester film having at least one base layer and at least one heat-sealable outer layer, wherein this heat-sealable outer layer comprises a copolymer which contains from 5 to 95% by weight of ethylene 2,6-naphthalate units.