摘要:
1. Verfahren zum Herstellen eines Filterelementes. 2. Verfahren zum Herstellen eines Filterelementes (1 ), mit den Schritten: a) Vorsehen eines Filtermediums (3), das einen inneren Filterhohlraum (7) umgibt und ein heißsiegelbares Material enthält; b) Vorsehen zumindest einer einen Abschluß des Filterhohlraumes (7) an zumindest einem Ende bildenden Endkappe (9, 13) aus thermoplastischem, laserdurchlässigem Material; c) Ausbilden einer laserundurchlässigen Sperrschicht (31) zwischen Endkappe (9, 13) und angrenzendem Ende des Filtermediums (3) und d) Verschweißen von Endkappe (9, 13) und Filtermedium (3), indem an die Sperrschicht (31) angrenzendes laserdurchlässiges Material mit Laserenergie derart durchstrahlt wird, dass durch Erhitzen des an die Sperrschicht (31 ) angrenzenden Bereiches ein Schweißvolumen als Fügeelement für die durch Laser-Durchstrahlschweißen erzeugte Schweißverbindung zur Verfügung gestellt wird.
摘要:
The welding of certain polymeric nanofibers can be accomplished by exposure to an intense short burst of light, such as is provided by a camera flash, resulting in an instantaneous melting of the exposed fibers and a welding of the fibers where they are in contact. The preferred nanofibers are composed of conjugated, conducting polymers, and derivatives and polymer blends including such materials. Alternatively, the nanofibers can be composed of colored thermoplastic polymeric fibers or opaque polymers by proper selection of the frequency or frequency range and intensity (power) of the light source. The flash welding process can also be used to weld nanofibers which comprise a blend of polymeric materials where at least one of the materials in the blend used to form the nanofiber is a conductive, conjugated polymer or a suitable colored thermoplastic. Alternatively the material blend used to form the nanofibers may comprise a polymeric material containing a colored additive, which is not necessarily a polymer, for example carbon black, or a colored nano-particulate organic or inorganic material, dye or pigment.
摘要:
Die vorliegende Erfindung betrifft durch Farbmittel transparent, transluzent oder gedeckt eingefärbte Kunststoffmaterialien, die durch einen Gehalt an nanoskaligen lasersensitiven Partikeln laserschweißbar sind. Diese Kunststoffmaterialien, die als Formkörper, Halbzeuge oder Lackbeschichtungen vorliegen können, enthalten insbesondere lasersensitive Partikel mit Partikelgröße von 5 bis 100 nm und einem Gehalt von 0,0001 bis 0,1 Gew.-%. Typische Verbindungen sind nanoskaliges Indium-Zinnoxid, Antimon-Zinnoxid, Indium-Zinkoxid und Lanthanhexaborid.
摘要:
The invention relates to a packaging material made of a multilayer oriented polyolefin film, which comprises a base layer and at least one first outer layer, whereby the first outer layer is placed in contact with itself or in contact with the opposing surface of the film or in contact with the surface of another film. This first outer layer contains an additive which absorbs light within the wavelength range of a laser such that when the film is locally irradiated by the laser, the area of irradiation experiences an increase in temperature that causes the polyolefin of the first outer layer to soften or melt in the irradiated area and to bond to another layer when cooled.
摘要:
The invention relates to a method for soldering the ends of tubular containers, specially tubes, filled with a flowable medium, made of a flat thin-walled material that can be softened or melted using heat, wherein the tubular container is held in such a way that the end to be soldered is accessible and the tubular container can be heated to a temperature on the accessible end along a peripheral area so that it can be soldered, and the heated end is compressed along a soldering seam running longitudinally perpendicular to the longitudinal extension of the container, whereby the tubular container is held in a stationary position, a laser beam is directed towards the inner wall of the tubular container via a deflection element outside said tubular container and the deflection element is made to rotate to heat the peripheral area.
摘要:
Apparatus for the non-impact formation of perforations in a web of substrate material such as a polymer film (15) includes a static laser (20), movable beam deflector means, e.g. rotatable drum (30), carrying a plurality of optical reflectors (35) arranged to sequentially and selectively deflect the beam onto successive target sites on the web to perform perforation by ablation of the surface. Either the laser is selected on the basis that its emission wavelength coincides with a molecular absorption band at a resonant frequency or the material itself is doped to provide a suitable absorbance at the standard emission wavelength of the available laser.
摘要:
The invention concerns a method of producing bristled articles, in particular brushes, a plurality of blind holes being formed in a thermoplastics bristle carrier. A thermoplastics bristle arrangement in the form of an individual bristle or a bundle of bristles is inserted into each of the blind holes, preferably with a narrow fit, until it contacts the base of the blind hole. The bristle carrier and the bristle arrangement are then welded to each other in their contact region in that laser beams are transmitted through the bristle carrier or bristle arrangement and applied directly to the contact region where they are absorbed and heat is produced.
摘要:
An article for laser marking can comprising: a thermoplastic composition comprising a thermoplastic polymer, an active component comprising at least one of a polymeric unit and an additive, wherein the thermoplastic polymer has a visible transmission of greater than or equal to 80% according to ASTM D1003-00, Procedure A, using D65 illumination, 10 degrees observer, and thickness of 1 mm; and a mark produced by chemical rearrangement of the active component generated by a laser of a first wavelength; wherein the mark exhibits at least one of: (i) a change in optical properties in the region 400 nm to 700 nm when exposed to light having a wavelength less than or equal to 500 nm; and (ii) a change in optical properties in the region of 400 nm to 700 nm when exposed to light having a wavelength greater than or equal to the first wavelength.