A box suitable for the packaging of a consumer product is formed by helically wrapping an elongated continuous strip of material around a mandrel to form a main body with a plurality of bands. In one embodiment, adjacent bands partially overlie one another to form a multi-paneled main body with an open top end and an open bottom end. An adhesive is disposed within the region of contact between adjacent bands to retain the shape of the main body. First and second sets of slots are formed in the main body to create flaps dimensioned to selectively enclose the open top and bottom ends, respectively. To define the flaps and promote pivotal articulation, the main body is also preferably provided with score lines. By adjusting the configuration of the mandrel, a customized box can be constructed that is sized to receive a consumer product with limited wasted space.

A box suitable for the packaging of a consumer product is formed by helically wrapping an elongated continuous strip of material around a mandrel to form a main body with a plurality of bands. In one embodiment, adjacent bands partially overlie one another to form a multi-paneled main body with an open top end and an open bottom end. An adhesive is disposed within the region of contact between adjacent bands to retain the shape of the main body. First and second sets of slots are formed in the main body to create flaps dimensioned to selectively enclose the open top and bottom ends, respectively. To define the flaps and promote pivotal articulation, the main body is also preferably provided with score lines. By adjusting the configuration of the mandrel, a customized box can be constructed that is sized to receive a consumer product with limited wasted space.

A plastic film roll includes: a convolute cardboard tube including a tubular body having a tubular body wall formed by a plurality of layers of a straight rolled cardboard sheet having a weight equal to or less than 300 gsm; a plastic film wound about the convolute cardboard tube to form a plurality of plastic film windings around the convolute cardboard tube, the plastic film windings creating a radial compression force equal to or greater than 10 bar on the tubular body wall, wherein the cardboard sheet includes a plurality of fibers, at least a majority of the fibers being substantially aligned in a tangential direction relative to the tubular body to allow the convolute cardboard tube to resist the radial compression force.

A plastic film roll includes: a convolute cardboard tube including a tubular body having a tubular body wall formed by a plurality of layers of a straight rolled cardboard sheet having a weight equal to or less than 300 gsm; a plastic film wound about the convolute cardboard tube to form a plurality of plastic film windings around the convolute cardboard tube, the plastic film windings creating a radial compression force equal to or greater than 10 bar on the tubular body wall, wherein the cardboard sheet includes a plurality of fibers, at least a majority of the fibers being substantially aligned in a tangential direction relative to the tubular body to allow the convolute cardboard tube to resist the radial compression force.

A method for improving the heat sealability of a packaging material and a method for manufacturing a heat-sealed container or package are described. The material can be polymer-coated packaging paper or cardboard, or a polymeric packaging film. The material includes a polymer layer that contains polyester, particularly polylactide, the heat sealability of which is improved by ultraviolet radiation. Polylactide is useful as such or when blended, for example, with other biodegradable polyester. The containers and packages thus manufactured include disposable drinking cups and cardboard carton and box packages.

A paperboard winding tube of enhanced compression stiffness and resistance to deformations leading to ovality under gravity type loading is disclosed. The paperboard winding tube may include a cylindrical body wall formed from a plurality of structural paperboard layers with at least one central structural paperboard layer disposed between at least one radially inward structural paperboard layer and at least one radially outward structural paperboard layer. The radially inward and the radially outward structural paperboard layers may be formed of a paperboard ply of a first stiffness, and the central structural paperboard layer may be formed of a paperboard ply of a second stiffness that is less than the first stiffness. The arrangement of the plurality of structural paperboard layers increases the compression stiffness of the paperboard winding tube to resist deformations leading to ovality of the cylindrical body wall under gravity type loading of the paperboard winding tube.

A paperboard winding tube of enhanced compression stiffness and resistance to deformations leading to ovality under gravity type loading is disclosed. The paperboard winding tube may include a cylindrical body wall formed from a plurality of structural paperboard layers with at least one central structural paperboard layer disposed between at least one radially inward structural paperboard layer and at least one radially outward structural paperboard layer. The radially inward and the radially outward structural paperboard layers may be formed of a paperboard ply of a first stiffness, and the central structural paperboard layer may be formed of a paperboard ply of a second stiffness that is less than the first stiffness. The arrangement of the plurality of structural paperboard layers increases the compression stiffness of the paperboard winding tube to resist deformations leading to ovality of the cylindrical body wall under gravity type loading of the paperboard winding tube.