A bushing for a web material roll including a body sized to be fitted into the web material roll; the bushing further including a wall extending across the central cavity of the web material roll when the bushing is in the central cavity of the web material roll and defining an opening for receiving a roll support therethrough, the opening being bordered by a roll support contacting surface, the bushing having one or more bearing surfaces for contacting the roll support and supporting the web material roll, the one or more bearing surfaces including at least the roll support contacting surface bordering the opening. A web material roll, a web material roll retention assembly and a method for placing a web material roll in a web material roll dispenser are also provided.

Provided is a glass film-resin composite body which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass roll with resin film comprises a glass film, and a resin film laminated to at least one surface of the glass film through an adhesive, wherein a creep amount a of the adhesive is 50 m or less, as measured after applying a tensile shear load per unit area of the adhesive of 5 g/mm.sup.2, to the resin film for 48 hours, in a state in which the glass film is fixed in 23 C. and 50% RH.

Provided is a glass film-resin composite body which makes it possible to obtain a long-length (e.g., 500 m or more-long) glass roll. The glass roll with resin film comprises a glass film, and a resin film laminated to at least one surface of the glass film through an adhesive, wherein a creep amount a of the adhesive is 50 m or less, as measured after applying a tensile shear load per unit area of the adhesive of 5 g/mm.sup.2, to the resin film for 48 hours, in a state in which the glass film is fixed in 23 C. and 50% RH.

A flexible glass laminate structure includes a flexible glass substrate having a thickness of no more than 0.3 mm. The flexible glass laminate structure includes a flexible glass layer including the flexible glass substrate. A property control layer is laminated to the flexible glass layer. A neutral axis of the flexible glass laminate is located outside the flexible glass layer when the flexible glass layer is in a compressive bend configuration.

A flexible glass laminate structure includes a flexible glass substrate having a thickness of no more than 0.3 mm. The flexible glass laminate structure includes a flexible glass layer including the flexible glass substrate. A property control layer is laminated to the flexible glass layer. A neutral axis of the flexible glass laminate is located outside the flexible glass layer when the flexible glass layer is in a compressive bend configuration.

The present disclosure relates to a metal foil core including a winding member around which a metal foil is wound, a first protrusion member protruding from the winding member in a first direction (direction of arrow FD) of a first axis direction (X-axis direction), a second protrusion member protruding from the winding member in a second direction (direction of arrow SD) opposite to the first direction (direction of arrow FD) of the first axis direction (X-axis direction), and a first inducing groove formed in the first protrusion member to be disposed between both ends of the first protrusion member in the first axis direction (X-axis direction).

The present disclosure relates to a metal foil core including a winding member around which a metal foil is wound, a first protrusion member protruding from the winding member in a first direction (direction of arrow FD) of a first axis direction (X-axis direction), a second protrusion member protruding from the winding member in a second direction (direction of arrow SD) opposite to the first direction (direction of arrow FD) of the first axis direction (X-axis direction), and a first inducing groove formed in the first protrusion member to be disposed between both ends of the first protrusion member in the first axis direction (X-axis direction).

Improved object wrapping materials exhibiting a number of beneficial properties to overcome prior deficiencies are provided. Such properties include the inclusion of a separation interface overlay that allows for greater rigidity at the leading and trailing edges of such wraps. Also, the inclusion of shear-reducing wrap material portions is described, as well as recoil reduction structures within the leading edge regions. Furthermore, core adhesive additions allow for greater resiliency to the base wrap material as it unwinds therefrom, reducing potential waste wrap products by permitting greater amounts of wrap materials in use. Other considerations include the ability, through proper configuration designs, to position a wrap separation indicator within a certain range of distances from the trailing edge, thereby providing greater reliability of wrap application device disengagement during wrap application. Such benefits are thus supplied individually and in tandem for improved versatility and utility of such wrap materials.

Improved object wrapping materials exhibiting a number of beneficial properties to overcome prior deficiencies are provided. Such properties include the inclusion of a separation interface overlay that allows for greater rigidity at the leading and trailing edges of such wraps. Also, the inclusion of shear-reducing wrap material portions is described, as well as recoil reduction structures within the leading edge regions. Furthermore, core adhesive additions allow for greater resiliency to the base wrap material as it unwinds therefrom, reducing potential waste wrap products by permitting greater amounts of wrap materials in use. Other considerations include the ability, through proper configuration designs, to position a wrap separation indicator within a certain range of distances from the trailing edge, thereby providing greater reliability of wrap application device disengagement during wrap application. Such benefits are thus supplied individually and in tandem for improved versatility and utility of such wrap materials.

A nip roller includes a core material having a surface coated with rubber. The nip roller having a support length L.sub.1 of 5 m or longer. The rubber surface has a hardness H (deg) equal to or lower than 65 deg as measured by a JIS K6253 Type A durometer (A type). Mass W (kg) of the nip roller and second moment of area I.sub.1 (m.sup.4) and the Young's modulus E.sub.1 (Pa) of the core material satisfy E.sub.1I.sub.1/W80000.