Abstract: Coextruded, biaxially oriented polyester films which have a white base layer (B) and have a heatsealable outer layer (A) that can be peeled from APET/CPET and from CPET, where the outer layer (A) includes a) from 80 to 99% by weight of polyester and b) from 1 to 10% by weight of inorganic and/or organic particles with a median diameter d50 of from 2.5 to 12 ?m, and where c) the polyester is composed of from 12 to 89 mol % of units derived from at least one aromatic dicarboxylic acid and of from 11 to 88 mol % of units derived from at least one aliphatic dicarboxylic acid, and d) the ratio calculated from the particle size d50 of the particles and the layer thickness dA of the outer layer (A) is greater than or equal to 1, and the base layer (B) comprises an inorganic white pigment and/or a polymer incompatible with polyester. The films of the invention are suitable as a packaging material for foods and other consumable goods or as a lid film for APET/CPET or CPET trays.

Abstract: The invention relates to biaxially oriented polyester films which are suitable for lamination to sheet metal; the invention in particular relates to a polyester film which (based on the weight of polyester) comprises from 1 to 8% by weight of isophthalate-derived units, and also comprises not only particles whose median diameter is from 0.1 to 2.0 ?m but also particles whose median diameter is from >2.5 ?m to <8 ?m. The invention further relates to a process for production of these films and to their use.

Abstract: The invention more particularly relates to a coextruded, transparent, biaxially oriented polyester film comprising a base layer (B) and a heatsealable top layer (A) which is peelable from at least APET, the heatsealable and peelable top layer (A) consisting of a) 80-98% by weight of polyester and b) 2-10% by weight of inorganic and/or organic particles having an average diameter d50 of from 2.0 to 8.0 ?m (based on the mass of the top layer (A)), wherein c) the polyester being composed of 30-95 mol % of units which derive from at least one aromatic dicarboxylic acid and 5-70 mol % of units which derive from at least one aliphatic dicarboxylic acid, d) the ratio of particle size d50 and layer thickness dA of the top layer (A) being greater than 1.3 and e) the layer thickness of the top layer (A) dA being from 0.5 to 2.5 ?m.

Abstract: The invention relates to a polyester film comprising a hydrolysis stabilizer, wherein the hydrolysis stabilizer is an epoxidized alkyl ester of fatty acid or is a mixture of epoxidized alkyl esters of fatty acid or is an epoxidized fatty acid glyceride or is a mixture of epoxidized fatty acid glycerides. The form in which the hydrolysis stabilizer is added to the polyester is that of dry liquid, absorbed by a carrier material.

Abstract: The invention relates to a biaxially oriented polyester film having a base layer (B) which comprises at least 80% by weight of a polyester comprised of from 55 to 90 mol % of units deriving from at least two aromatic dicarboxylic acids and of from 5 to 45 mol % of units deriving from at least one aliphatic dicarboxylic acid, where the total of the dicarboxylic-acid-derived molar percentages is 100. The film features ultimate tensile strength of ?100 N/mm2 and modulus of elasticity of ?3000 N/mm2.

Abstract: The invention relates to a single- or multilayer, oriented, film coated with an aminosilane compound and composed of polyester which comprises an additive which, on irradiation with electromagnetic radiation, forms metal nuclei on which further metal can be deposited in further steps of the process. The invention further relates to a process for producing this film and to its use in printed circuit boards, ribbon cables, smart cards, RFID labels, membrane keyboards, and film-based circuits of any type.

Abstract: The invention relates to a hydrolysis-stable polyester whose thickness is preferably in the range from 0.4 to 500 ?m. The film comprises polyester and at least one hydrolysis stabilizer and is distinguished by its low hydrolysis rate. The invention furthermore relates to a process for the production of the film and its use.

Abstract: The invention relates to a polyester film with a thickness of from about 4 to about 23 ?m, which comprises, alongside polyethylene terephthalate as main constituent, from about 2 to about 20% by weight of polyethylene naphthalate (based on the weight of the film), and has fewer than 30 pinholes per 100 m2. The invention further relates to a process for producing these films, and to the use of the films in packaging composites.

Abstract: Biaxially oriented polyester films which have a polyester-containing base layer (B) which additionally comprises poly(m-xyleneadipamide) and at least one overlayer (A), and whose average roughness is preferably from 10 to 100 nm and whose gloss is greater than 100, feature improved optical properties and very good barrier properties, especially toward passage of oxygen, and are therefore suitable as packaging materials for foods or other consumable items.

Abstract: This invention relates to a white, biaxially oriented polyester film, preferably formed of PET, with a base layer and with at least one outer layer. The base layer includes a concentration of from 3 to 15% by weight of a whitening pigment, and the outer layer includes a concentration of from 2 to 15% by weight of a whitening pigment and from 0.01 to 2% by weight of an antiblocking agent. The antiblocking agent has a median particle diameter of from 2 to 8 ?m. Optionally, at least one surface of the film has a functional coating. The film is particularly suitable as lid film for food-or-drink containers.

Abstract: The invention relates to a hydrolysis-stable polyester film comprising a polyester, whose thickness is preferably in the range from 0.4 to 500 ?m. The film comprises polyester and at least one hydrolysis stabilizer and is distinguished by its low hydrolysis rate. The invention furthermore relates to a process for the production of the film and its use.

Abstract: This invention relates to a coextruded, transparent, biaxially oriented polyester film comprising a base layer (B) and a heatsealable top layer (A) which is peelable from at least CPET, the heatsealable and peelable top layer (A) consisting of a) 80–98 % by weight of polyester and b) 2–10 % by weight of inorganic and/or organic particles having an average diameter d50 of from 2.5 to 12.0 ?m (based on the mass of the top layer (A)), wherein c) the polyester is composed of 12–89 mol % of units derived from at least one aromatic dicarboxylic acid and 11–88 mol % of units derived from at least one aliphatic dicarboxylic acid, the sum of the dicarboxylic acid-derived molar percentages being 100, d) the ratio of particle diameter d50 and layer thickness dA of the top layer (A) being greater than/equal to 1.0 and e) the layer thickness of the top layer (A) dA being from 2.3 to 10.0 ?m. The invention further relates to a process for producing the film and to its use.

Abstract: Coextruded, biaxially oriented polyester films which have a base layer (B) and have a heatsealable outer layer (A) that can be peeled from APET/CPET and from CPET, where the outer layer (A) includes a) from 80 to 98% by weight of polyester and b) from 2 to 10% by weight of inorganic and/or organic particles with a median diameter d50 of from 3 to 12 ?m, and where c) the polyester is composed of from 12 to 89 mol % of units derived from at least one aromatic dicarboxylic acid and of from 11 to 88 mol % of units derived from at least one aliphatic dicarboxylic acid, and d) the ratio calculated from the particle size d50 of the particles and the layer thickness dA of the outer layer (A) is greater than or equal to 1.5, and the shrinkage of the films, at least in one direction, is more than 5%. The films of the invention are especially suitable, owing to their property of self-venting, as a lid film for APET/CPET or CPET trays.

Abstract: The invention relates to an in-line coated, biaxially oriented polyester film in which at least one surface has a coating formed from the dried residue of an aqueous coating composition, where the aqueous coating composition includes from 1 to 20% by weight (based on the weight of the coating composition) of EAA (ethylene-acrylic acid copolymer) particles whose median particle size (d50 value) is from 1 to 200 ?m.

Abstract: The invention relates to a biaxially oriented polyester film, preferably PET film, which has a hydrophilic coating on at least one surface. The coating composition used to form the hydrophilic coating includes water, a sulfopolyester, a surfactant, and optionally an adhesion-promoting polymer. The inventive films have a hydrophilic surface which inhibit condensation of water droplets on the films.

Abstract: Coextruded, biaxially oriented polyester films which have a base layer (B) and have a heatsealable outer layer (A) that can be peeled from APET/CPET and from CPET, where the outer layer (A) comprises from 80 to 99% by weight of polyester and from 1 to 10% by weight of inorganic and/or organic particles with a median diameter d50 of from 2.5 to 12 ?m, and where the polyester is composed of from 12 to 89 mol % of units derived from at least one aromatic dicarboxylic acid and of from 11 to 88 mol % of units derived from at least one aliphatic dicarboxylic acid, and the ratio calculated from the particle size d50 of the particles and the layer thickness dA of the outer layer (A) is ?1, and the base layer (B) comprises poly(-xyleneadipamide). The films of the invention are suitable, owing to their increased oxygen barrier, as a packaging material for foods and other consumable goods or as a lid film for APET/CPET or CPET trays.

Abstract: This invention relates to a three-layer, polyester film with A-B-C structure, which includes a base layer B, preferably formed from PET, disposed between cover layers A and C. The cover layers contain polyester with ethylene terephthalate and/or ethylene isophthalate units and, as an additional polymer poly(m-xylene-adipamide) in an amount of 10 to 45 wt. %. At least one of the cover layers also contains an antiblocking agent preferably with a mean particle diameter of 2 to 5 ?m. This film has a high oxygen barrier.

Abstract: The invention relates to a single- or multilayer, white, biaxially oriented polyester film. Films of the invention are formed from thermoplastic polyester and are coated on at least one side with a water-soluble adhesion-promoting layer that includes a hydrolyzed amino-functional silane. The invention further relates to the use of the film and to a process for its production.

Abstract: This invention relates to a coextruded, transparent, biaxially oriented polyester film comprising a base layer (B) and a heatsealable top layer (A) which is peelable with respect to at least CPET. The heatsealable and peelable top layer (A) consists of a) 70–97% by weight of polyester and b) 3–20% by weight of a polyester-incompatible polymer (=anti-PET polymer) based on the mass of the top layer (A), wherein c) the polyester is composed of 20–95 mol % of units derived from at least one aromatic dicarboxylic acid and 5–80 mol % of units derived from at least one aliphatic dicarboxylic acid, the sum of the dicarboxylic acid-derived molar percentages being 100, and d) the layer thickness of the top layer (A) dA is from 1.7 to 6.0 ?m. The invention further relates to a process for producing the film and to its use.

Abstract: This invention relates to a coextruded, transparent, biaxially oriented polyester film comprising a base layer (B) and a heatsealable top layer (A) which is peelable from at least APET, the heatsealable and peelable top layer (A) consisting of a) 60–97% by weight of polyester and b) 3–30% by weight of a polyester-incompatible polymer (=anti-PET polymer), based on the mass of the top layer (A), wherein c) the polyester being composed of 25–95 mol % of units which derive from at least one aromatic dicarboxylic acid and 5–75 mol % of units which derive from at least one aliphatic dicarboxylic acid, the sum of the dicarboxylic acid-derived molar percentages being 100, and d) the layer thickness of the top layer (A) dA being from 0.7 to 2.5 ?m.