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 laser weldable composition comprising a polyester component, 5 to 50 weight percent of a filler; and 10 to 30 wt. % of a poly(ester-carbonate) copolymer comprising carbonate units and ester units of the formula (I) wherein: T is a C.sub.2-20 alkylene, a C.sub.6-20 cycloalkylene, or a C.sub.6-20 arylene; R.sup.1 and J are each independently (a) a bisphenol A divalent group, and (b) a C.sub.16 or higher divalent group (b1), (b2), or (b1) and (b2), wherein (b1) is a phthalimidine divalent group, and (b2) is a third divalent group, wherein the C.sub.16 or higher divalent group (b1), (b2) or a combination of (b1) and (b2) is present in an amount of 40 mol % to 50 mol % based on the total moles of the bisphenol A divalent groups and the C.sub.16 or higher divalent group; and the composition, when molded into an article having a 2.0 mm thickness, provides a near infrared transmission at 960 nanometers of greater than 50% and a thermal resistance according to HDT 1.8 MPa flat (ISO 75/Af) is greater than 160 C.

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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 provides a pressure control device for maintaining a constant predetermined pressure in a fluid dispensing container, as well as a pressure control system which includes the device. The present invention further concerns a method for manufacturing the pressure control device and system of the invention. The invention is of particular importance in the technical field of aerosol sprays.

A method for manufacturing a pouch-type secondary battery according to an embodiment of the present invention may include: a first sealing operation of fusing a lead film, which is attached to an electrode lead of an electrode assembly, to a sealing portion of a pouch in which the electrode assembly is accommodated; and a second sealing operation of sealing the sealing portion of the pouch. The first sealing operation may include: a heating process of irradiating with a laser beam a region which is present in the sealing portion of the pouch and corresponds to the lead film, thereby heating the lead film and melting a resin layer of the region; and a bonding process of compressing the region, thereby bonding the lead film and the melted resin layer.

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.

The invention relates to a valve body including a membrane which cooperates with a valve seat, wherein the valve body and the membrane are connected to each other in the region of a laser weld seam in a bonded and fluid-tight manner.

The present invention is to provide a thermoplastic resin composition capable of obtaining a molded article that is excellent in appearance after laser welding and a color tone and has sufficient impact property as a resin member. In addition, the present invention is to provide a molded article that is excellent in appearance after laser welding and a color tone and has sufficient impact resistance as a resin member. As a result of intensive studies, the present inventors have found that the above problems can be solved by controlling a thermoplastic resin composition containing rubber-containing graft copolymer to have appropriate reflectance in the visible light and absorptivity in the near-infrared region, and have completed the present invention.

The present invention relates to a pressure reducer for delivering drugs to a patient and the corresponding method of manufacture, said pressure reducer for delivering drugs to a patient comprising: a duct (9) with an inlet (11) and an outlet (13), a first body (1) with a first surface (5), and a second body (3) with a second surface (6) directly contacting the first body (1). One of the surfaces (5,6) has a recess (7) such that a duct (9) is defined between both surfaces. Both bodies are attached to one another by means of a continuous attachment line running on both sides of the duct (9). The method of manufacture comprises a laser welding step in which the first body (1) is welded to the second body (3) by means of a welding seam extending along both sides of the duct.

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.