Both high air permeability and high peeling strength are achieved.

The above problem is solved by providing an underpants-type disposable diaper including a stretchable region (80) stretchable at least in one direction in an outer body (20), in which the stretchable region (80) is formed by stacking an elastic film (30) between a first sheet layer (20A) composed of a nonwoven fabric and a second sheet layer (20B) composed of a nonwoven fabric, and in a state in which the elastic film (30) is stretched in the stretching and contracting direction, the first sheet layer (20A) and the second sheet layer (20B) are joined via through holes (31) formed in the elastic film (30) at a large number of sheet bond portions (40) arranged at intervals in each of a stretching and contracting direction and a direction orthogonal thereto, and in the sheet bond portions (40), the first sheet layer (20A) and the second sheet layer (20B) are joined at least by a melted and solidified material (30m) of the elastic film (30) among the first sheet layer (20A) and the second sheet layer (20B).

A bag (100) suitable for packaging fruit and vegetable products (2) comprising a casing (103) capable of housing the products to be packaged and at least one first band (104) and one second band (105) each arranged on the outer face of the casing so as to seal said casing, the first band (104) being joined to the casing only at its ends (104a, 104b) forming a handle (106) and the second band (105) joined along the length thereof to the associated face of the casing, forming a stable bottom (105c). A station (1) for producing this bag (100) comprises an expansion device (4) of tubular material comprising an upper expansion body (4a) and a lower expansion body (4b) mechanically linked to each other with a capacity for movement of one with respect to the other and that cooperate with welding groups.

A method of fastening a second object to a fiber composite part including a structure of fibers embedded in a matrix material includes: providing the fiber composite part including an attachment surface, with a portion of the structure of fibers being exposed at the attachment surface; providing the second object; placing the second object relative to the fiber composite part, with a resin in a flowable state between the attachment surface and the connector; pressing the second object and the fiber composite part against each other and causing mechanical vibration to act on the second object or the fiber composite part or both, thereby causing the resin to infiltrate the exposed structure of fibers and activating the resin to cross-link; whereby the resin, after cross-linking, secures the second object to the fiber composite part.

An apparatus for manufacturing an elastic composite structure for an absorbent sanitary product includes an anvil with weld pattern comprising at least one anchoring region and at least one deactivating region. The anchoring region includes anchoring welds that form anchoring bonds that fuse facing web layers and anchor elastic thread(s) in position relative to the facing web layers. The deactivating region includes a break bar constructed to sever the thread(s). A method of manufacturing the elastic composite structure includes positioning a tensioned elastic thread between web layers, fusing the web layers to form an anchored zone that includes anchoring bonds that fuse the web layers and anchor the tensioned elastic thread therebetween, and cutting the thread to form a deactivated zone between adjacent portions of the anchored zone that is free of tensioned threads. The method further includes fusing the web layers within the deactivated zone.

A system for ultrasonic bonding of elastic includes a rotating roll. The rotating roll has an exterior surface. A removable shell layer is attached to the external surface. The removable shell layer includes one or more patterned segments. The patterned segments include a shell channels formed through the removable shell layer to form a pattern.

Apparatus and methods are provided to allow for creation of an elastic laminate. Non-stretched elastic can be laid at peaks over a nonwoven layer contained in valleys and atop peaks. Stretched elastic can be laid over tented nonwoven to create nonwoven tunnels when a second nonwoven is laid atop the first nonwoven and elastic, and the tunnels resist un-stretching of stretched elastic strands by frictional or obstruction forces. An elastic assembly or structure comprising a first and second layer of material bonded at spaced apart bond sites is disclosed, with a plurality of elastic strands disposed in a non-linear manner between said first and second layer of material, so that said strands meander in a cross-machine direction and traverse a machine direction line, restraining movement of the strands by frictional forces between the strands and the non-woven layers.

An elastic film stretchable structure in which an elastic film is stacked between a first sheet layer having air permeability and a second sheet layer having air permeability, the first sheet layer and the second sheet layer are bonded through bonding holes penetrating the elastic film at a number of sheet bonded portions arranged at intervals. A region having the elastic film stretchable structure has a stretchable region that is stretchable in a stretchable direction, and the stretchable region is contracted in the stretchable direction by a contraction force of the elastic film and is extensible in the stretchable direction, and vent holes are formed on the elastic film at sites where the elastic film does not overlap with the sheet bonded portions.

A welding apparatus is suitable for welding polymeric materials, and particularly but not exclusively those that may be thin or brittle. A welding apparatus is provided for welding polymeric materials along a weld zone of the polymeric material. The welding apparatus has a carrier for supplying heat to the weld zone to cause melting of the polymeric material, wherein the heating element is arranged to reciprocate relative to the carrier between a retracted and an extended configuration, such that as the element moves from the retracted to the extended configuration the heating element melts and penetrates the surface of the polymeric material. The carrier also has a trailing contact surface trailing the heating element along the weld zone arranged to constrain molten polymeric material in the weld zone. The heating element is also arranged to reciprocate relative to the trailing contact surface.

A three dimensional tape that may be used as a top sheet and a backsheet for a sanitary product, particularly a baby diaper or a sanitary pad. The three dimensional tape allows manufacturing of comparatively thinner, fluffless sanitary products with an improved comfort for the user. Manufacturing of the tape may be accomplished in-line, thereby dispensing with all of the logistics burden from outsourced products, and all of the environmental impact the logistics come with.

A method of bonding a first object to a second object includes the steps of: providing the first object including thermoplastic material in a solid state, providing the second object including a proximal surface, applying a mechanical pressing force and a mechanical excitation capable to liquefy the thermoplastic material until a flow portion of the thermoplastic material is flowable and penetrates into structures of the second object, and stopping the mechanical excitation and letting the thermoplastic material resolidify to yield a positive-fit connection between the first and the second object. The second object has a region of low density, wherein the protrusion penetrates the region of low density at least partly before the thermoplastic material is made flowable, and wherein the first object includes a protruding portion after the step of letting the thermoplastic material resolidify, the protruding portion at least partly penetrates the region of low density.