The invention relates to a method for welding a polyolefin plastic and a plastic using a primer, said primer containing at least one maleic anhydride containing polymer and at least one polyester. The invention also relates to correspondingly bonded products.

The present invention discloses a method for laser welding of plastics, comprising the steps of providing a first plastic material to be welded comprising a compound capable of absorbing near-infrared light, positioning a second plastic material in intimate contact with the first plastic material, and activating a laser source emitting a wave length in the near-infrared spectrum to obtain attachments of the first and the second plastic material. The compound capable of absorbing near-infrared light is a dye derived from croconic acid.

A new fluid dispenser container is described which comprises a transparent plastic container body (12) with an open end and a separate bottom part (13) joined by laser welding to the open end of the transparent plastic container body. The separate bottom part (13) is made from the same transparent plastic material as the plastic container body (12) and the separate bottom part is laser welded to the plastic container body by melting mating surface lines on the plastic container body (12) and on the separate bottom part (13), whereas the heat to melt is created by a stationary laser means while the plastic container body has been rotated by rotating means at least over a full rotation or by a circularly movable laser means in a full circular motion while the plastic container is stationary.

A laser welding apparatus is provides that includes: a support member including a heat generation portion which has a size that is limited to correspond to a size of a welding area of a plurality of plastic components and is made from a material that absorbs a laser beam and generates heat, and which generates heat of a temperature that is equal to or greater than a melting temperature of the plastic components; a laser beam irradiation unit for converging a laser beam to be transmitted through the plurality of plastic components, and irradiating the laser beam toward the heat generation portion through the plurality of plastic components; and a welding controller for causing a laser beam to be irradiated at the heat generation portion using the laser beam irradiation unit to thereby cause the heat generation portion to generate heat, and welding abutting faces of a welding area of the plurality of plastic components with heat that is generated.

A substrate assembly and a method of bonding substrates are disclosed. The method includes steps of: providing two substrate; subjecting a connecting surface of each of the substrates to surface-modifying treatment to form surface-modified region respectively on each of the connecting surfaces; contacting the substrates in such a manner that the substrates are connected with each other through a physical interaction between the surface-modified regions; and laser irradiating and melting a portion of each of the connecting surfaces to form a respective bonding region, and solidifying the melted bonding regions of the substrates to bond the substrates together.

The present invention relates to a device for producing a reinforcing structure, which comprises a fiber-reinforced strip having a thermoplastic material, onto a molded body surface. The device is characterized in that emission direction vectors of at least two laser diodes of a laser diode array are aligned in a non-parallel manner to one another and are directed toward one another in the direction of a heating surface of the strip and/or the molded body surface.

The present invention discloses a device for producing a reinforcing structure, which comprises a strip that is fiber-reinforced and comprises thermoplastic material, on the surface of a molding. The device is characterized in that it is designed such that the laser diode array directly irradiates the heating-up area of the strip and/or the heating-up area of the surface of the molding or of the already formed reinforcing structure, wherein the laser diodes of the laser diode array are formed as surface emitters.

Provided is a method of manufacturing a heterogeneous material joined body, the method comprising irradiating a surface of a glass layer with a first laser to form two or more etched lines on the surface of the glass layer; providing a resin layer on the surface of the glass layer having the two or more etched lines; and irradiating the surface of the glass layer with the resin layer with a second laser to fill the etched lines and the surface of the glass layer with the resin layer and join the resin layer and the glass layer, wherein the glass layer having the two or more etched lines is irradiated with the second laser in a direction from the glass layer to the resin layer with focus on the surface of the glass layer which is in contact with the resin layer.

A resin composition for laser welding contains: relative to 100 mass parts of (A) a thermoplastic polyester resin material that contains a polybutylene terephthalate homopolymer and at least one of a polybutylene terephthalate copolymer, a polyethylene terephthalate resin, and a polycarbonate resin, 0.0005 to 0.5 mass parts of (B) nigrosine; and 0.01 to 2 mass parts of (C) a colorant containing at least an anthraquinone dye C1 having a maximum absorption wavelength in a range of 590 to 635 nm, a perinone dye C2 having a maximum absorption wavelength in a range of 460 to 480 nm, and an anthraquinone dye C3 having a maximum absorption wavelength in a range of 435 to 455 nm, at C1: C2:C3=24 to 41:24 to 39:22 to 46 as the mass ratio relative to 100 mass parts for a total of C1, C2, and C3.

A system for manufacturing a balloon envelope includes a table component and a sealing component. The sealing component includes a first level and a second lower level. The first level further includes first and second platforms. The first platform can provide a work area for sealing respective first and second sheets of material together to form a sealed edge and the second platform may provide a work area for sealing the second sheet of material and a third sheet of material together. The first, second, and third sheets of material respectively form first, second, and third gores of the balloon envelope. The sealing component may be configured to move along length of the first platform and to apply a heat seal to bond the first sheet of material to the second sheet material and form a sealed edge.