There is described an acrylic polyester resin, obtainable by grafting an acrylic polymer with a polyester material. The polyester material is obtainable by polymerizing (i) a polyacid component, with (ii) a polyol component, including2,2,4,4-tetraallcylcyclobutane-1,3-diol. One of the polyacid component or the polyol component comprises a functional monomer operable to impart functionality on to the polyester resin, such that an acrylic polymer may be grafted with the polyester material via the use of said functionality. Also provided is an aqueous coating composition comprising the acrylic polyester resin and a metal packaging containing coated with the composition.

A colored biaxially stretched polyester film for metal plate attachment and forming processing, includes three layers: opposite surface layers (layers A) that contain substantially no coloring pigment and are made of a copolyester having an intrinsic viscosity of 0.65 to 0.80 and a melting point (TmA) of 230 to 260 C.; and a core layer (layer B) that has a coloring pigment content of more than 10 wt % and 50 wt % or less and is made of a copolyester having an intrinsic viscosity of 0.55 to 0.70 and a melting point (TmB) of 230 to 260 C. The film has a surface roughness within a range of 10 to 40 nm, and (TmBTmA) is 4 C. or less.

A composite film for closing a container by sealing the composite film against a circumferential sealing surface of the container or of a cap ring to be connected to the container has a support layer made of a metal film and a sealing layer connected to the metal film. The sealing layer comprises a coextruded layer with a cohesively breaking intermediate layer and adhesion promoter layers arranged on both sides of the intermediate layer. The composite film is suitable for tight sealing against sealing surfaces made of polished tinplate.

A biaxially drawn colored polyester film includes at least two layers: a surface layer (layer A) mainly composed of polyester having a melting point TmA of 230 to 260 C. and modified polyolefin wax, layer A having a polymer component with intrinsic viscosity of 0.46 or more, the modified polyolefin wax with an amount of 0.2 wt % or more based on the weight of the composition, coloring pigment with an amount of 10 wt % or less, and a water contact angle of less than 70 on an outer surface; and a substrate layer (layer B) mainly composed of polyester having a melting point TmB of 230 to 260 C. and coloring pigment, layer B having a polymer component with intrinsic viscosity of 0.46 or more and the coloring pigment with an amount of more than 10 wt % and 50 wt % or less; wherein |TmBTmA| is 4 C. or less.

Provided herein are an aluminum can end stock (CES) and methods for producing CES. The CES includes a laminated metal strip having a polymer film coating and beneficially exhibiting low feathering, low hairing, and high abrasion resistance. The laminated metal strip can include the laminated polymer coating on an exterior-facing side and a lacquered coating on an interior-facing side. The CES is formed by laminating a polymer film to a side of the metal strip and annealing the laminated metal strip. In some cases, the polymer film laminated to the metal strip is a polyethylene terephthalate (PET) film, which may be colored.

A biodegradable packaging material, a method of manufacturing the same, as well as products made of the material wherein the manufacture comprises extrusion onto a fibrous substrate one or more polymer coating layers including at least one layer of a polymer blend consisting of (i) 20-95 wt-% of polylactide having a high melt index of more than 35 g/10 min (210 C.; 2.16 kg), (ii) 5-80 wt-% of polybutylene succinate (PBS) or a biodegradable derivate thereof, and (iii) 0-5 wt-% of one or more polymeric additives. The components of the blend are melted and blended in connection with the extrusion step. The goal is to improve extrudability, increase machine speed in extrusion and maintaining good adhesiveness to the substrate and good heat-sealability of the coating. The products include disposable drinking cups and board trays, as well as sealed carton packages for solids and liquids.

A laminated metal sheet for a metal container lid includes a polyester resin layer formed on a metal sheet. The polyester resin layer is composed of an A and a B layer, wherein the melting point of the A layer is lower than the melting point of the B layer by 20 C. or more, the A layer includes a molten layer where the value of the ratio of a peak intensity I.sub.0 to a peak intensity I.sub.90 is 1.5 or less, the B layer includes an orientation layer where the value of the ratio of the peak intensity I.sub.0 to the peak intensity I.sub.90 is 3.0 or more, the thickness of the A layer is within the range from 5 m or more to less than 30 m, and the thickness of the B layer is within the range from 0.5 m or more to less than 6.0 m.

A laminated steel sheet for a two-piece can body with a high strain level satisfying the following formulae, the polyester resin layer composing the laminated steel sheet having a center line surface roughness (Ra) of 0.2 m to 1.8 m:
r.sub.1r,0.1r.sub.1/R0.25, and 1.5h/(Rr)4 wherein h is the height of the two-piece can body, r is the maximum radius, r.sub.1 is the minimum radius, and R is the radius of the circular laminated steel sheet before forming having the same weight as the can body.

A metal sheet for containers includes a metal sheet and a polyester film which is laminated on a surface of the metal sheet to be an inner surface side of containers. The polyester film contains a wax in an amount of 0.010 to 2.000 mass %, and has a dipole-dipole force of 40 mN/m or less.

A process for producing a laminate in a coating line including the subsequent steps of: providing a metal strip; pre-heating the metal strip to a temperature of at least 100 C.; producing a laminate by adhering a first thermoplastic polymer coating layer on one major surface of the strip and a second thermoplastic polymer coating layer on the other major surface of the strip wherein the first thermoplastic polymer coating layer includes a polymer with a melting point below 200 C.; heating the laminate in a non-oxidising gas atmosphere in a post-heating step to at least the melting point of the polymer or polymers in the second polymer coating layer, and at least 220 C.; rapidly cooling or quenching the laminate to a temperature of below 50 C. Also, a polymer coated metal strip produced thereby, or a can produced therefrom.