Provided is a laser welded body which can be integrated through a laser-welding step without undergoing complicated steps even through use of the same or difference resin members each other, which has excellent welding strength between the resin members, which maintains the characteristics of a resin contained in the resin member and which exhibits the high welding strength by improving meltability of the resin members yet under a laser-welding condition of a medium and high scan speed.

A laser welded body comprises a resin member(s) which contains a thermoplastic resin and nigrosine sulfate having a sulfate ion concentration of 0.3 to 5.0% by mass and has an absorbance a of 0.09 to 0.9, an adjoined part where the resin member(s) is overlapped and/or butted, and at least a part of the adjoined part is laser-welded.

A system and method for laser sealing an edge portion of a covering of an architecture-structure covering is disclosed. In one embodiment, after cutting a covering of an architectural-structure covering to an appropriate size, lasering the cut edge portions or surfaces of the covering to seal the cut edge portions or surfaces of the covering to prevent fraying. The beam of the laser may be positioned to contact the cut edge portions or surfaces of the covering in a plane of the fabric. Subsequently, the beam of the laser scans or moves across the surface of the cut edge portion of the covering. In use, the beam of the laser is arranged and configured to apply heat to the surface of the fabric material at discrete points or spots to vaporize any loose fibers located along the cut edge portion of the covering.

An automobile interior trim has a resin core material and a skin material that is joined on a surface of the resin core material. The automobile interior trim has stitches that are formed on the skin material by sewing the skin material with threads. The skin material and the stitches are cut by a laser beam to generate a cut section. The vicinity of the cut section has a structure in which threads of the stitches and the raw material of the skin material are melted by heat of the laser beam, mixed together, and solidified.

A pull-on diaper 50B of the invention includes an outer cover assembly 3 defining the exterior surface of the diaper. A front body portion F and a rear body portion R of the outer cover assembly 3 are connected to each other along their laterally opposite side edges to form a pair of side seams 4, a waist opening 8, and a pair of leg openings 9. Each side seam 4 has a sealed edge portion 41 where the front body portion side edge 3F and the rear body portion side edge 3R of the outer cover assembly 3 are bonded to each other at a continuous linear fusion bond extending in the longitudinal direction of the side seam and, in part, a non-sealed portion 42 where the front body portion side edge 3F and the rear body portion side edge 3R of the outer cover assembly face to each other in a non-bonded relationship.

An automobile interior trim has a resin core material and a skin material that is joined on a surface of the resin core material. The automobile interior trim has stitches that are formed on the skin material by sewing the skin material with threads. The skin material and the stitches are cut by a laser beam to generate a cut section. The vicinity of the cut section has a structure in which threads of the stitches and the raw material of the skin material are melted by heat of the laser beam, mixed together, and solidified.

A water valve, guide tube for a water valve, and associated method are provided. The water valve includes a housing and the guide tube is installed on the housing via laser welding. The guide tube and housing each provide axially facing mating surfaces which abut one another in a pre-bonded configuration. In a post-bonded configuration, a laser weld joint is formed at the interface between the mating surfaces. The joint forms a portion of an outer periphery of the housing.

The present disclosure relates to methods and components for the bonding together of plastic components during a manufacturing and/or assembly process to create molds for lost-wax casting.

A manufacturing method of a resin component includes: providing a first resin member containing a polymer and a second resin member containing a polymer; and joining a first joining portion of the first resin member and a second joining portion of the second resin member to each other. The joining of the first resin member and the second resin member to each other includes irradiating the first joining portion of the first resin member with a laser light having a peak wavelength in a range from 350 nm to 420 nm is emitted in a presence of oxygen so as to cause multiphoton excitation of the first joining portion of the first resin member.

In the present invention, one surface of a belt-shaped sheet laminate (10), in which a plurality of sheets are laminated, is pressed against a support member (21) having a light passage section (27) through which a laser beam (30) can pass, and the belt-shaped sheet laminate (10) is irradiated, from the support member (21) side via the light passage section (27), with a laser beam (30) to cut and fusion-bond the belt-shaped sheet laminate (10), thereby sealed edge sections (4) are formed by fusion-bonding the edge sections of the plurality of sheets.

An object of the invention is to provide a laser welding quality determination method for improving a determination accuracy of a welding quality which is strongly affected by an inner defect of a welding bead, and a laser welding apparatus which includes a mechanism for performing the quality determination method. There is provided a laser welding quality determination method of determining a welding quality in laser welding, including: capturing an image of a molten pool formed by emitting a laser beam to a welding target material to acquire image data of the molten pool; measuring a width of the molten pool in a direction orthogonal to a welding direction from the acquired image data of the molten pool; calculating a penetration depth from the measured width of the molten pool; and determining the welding quality from the measured width and the calculated penetration depth of the molten pool.