摘要:
The present invention relates to a method for forming a welded bond between polymer surfaces, comprising (i) applying a welding promoter composition to a to-be-welded area of one or both polymer surface(s), wherein the welding promoter composition comprises particles with a particle size range of 0.1 to 1000 μιη, the particles being made of a material that is inert towards a chemical reaction with the first and/or second polymer surface; (ii) applying energy to the to-be-welded area of the first polymer surface, the second polymer surface or both, the energy being sufficient to melt at least a portion of the polymer in the to-be-welded area of the polymer surface, and contacting the to-be-welded areas of the polymer surfaces; and (iii) allowing the molten polymer in the to-be- welded area to solidify so that a welded bond is formed between the polymer surfaces. The invention further relates to the thus produced articles and the use of the described compositions as welding promoters.
摘要:
The laminated product (2) formed by alternated piling of glass sheets and thermoplastic sheets is placed on a conveyor belt (1) with indexed feed. In position (2), the laminated product is heated by dielectric losses between the plates (3a and 3b), connected to the generator (4). In position (2'), the laminated product is clamped between the jack plates (5a and 5b) of which the sides facing each other are lined with soft walls sealingly secured by their edges. Pressure air is introduced through conduits such as (5c) between the jack plate (5a, 5b) and its soft wall. The progressive inflation bulges the soft walls, and the clamping area of the laminated product (2') is progressively developed from the center towards the edges, while expelling air imprisoned in the laminated product (2'). After solidification of the thermal plastic material, the laminated product (2") is unloaded.
摘要:
Die Erfindung betrifft ein Verfahren und eine Vorrichtung zum Verschweissen von Kunststoffrohren (1) aus thermoplastischem Kunststoff mittels eines Stumpfschweissverfahrens, wobei die Rohre (1) in koaxialer Lage zueinander mittels Spannstellen (2) gehalten werden, mittels eines Hobels (3) der zwischen die Spannstellen (2) bringbar ist, gehobelt werden und mittels Heizspiegel (6) der anstelle des Hobels (3) montierbar ist, aufgeheizt werden, wobei durch die Erwärmung der freien zu verschweissenden Rohrenden (8) ein Aufschmelzbereich erzeugt wird, der beim Verpressen eine Wulst bildet, wobei der Rohrüberstand (5) der Rohre (1) auf ein definiertes Mass gehobelt werden.
摘要:
Systems useful for reinforcing a support mat over at least one seam formed between upper and lower panels of the mat include at least one extruder configured to apply weld-forming material over the seam(s) to form at least one weld atop the seam(s) and at least one electronic controller associated with the extruder.
摘要:
A web article (28) includes at least a first fibrous layer (36) laminated with a first facing surface (72) of at least one polymer film layer (38). The first fibrous layer can include a first quantity of cellulosic fibers. The first fibrous layer and the at least one polymer film layer have been configured to provide a target web (26), which has been moved at a selected web speed. A rotating anvil roller (34) and counter-rotating pattern roller (32) have been urged together to provide a selected nip force value. Additionally, the target web has been moved at the web speed through a nip region (30) between the anvil roller (34) and pattern roller (32) to provide an operative first bond between the first fibrous layer (36) and the at least one film layer (38).
摘要:
A method and apparatus (10) are provided for dynamically bonding plural workpiece layers (20, 22) together. The apparatus comprises: a first assembly (30) including a rotatable element (32a, 32b) having an outer circumferential portion (34a, 34b) adapted to engage one of the workpiece layers; a second assembly (50) including an anvil roll (52) adapted to engage another of the workpiece layers and defining with the rotatable element a nip for receiving the workpiece layers; a drive mechanism for effecting rotation of the rotatable element and the anvil roll; and servo motor apparatus (80) for applying a predefined force to at least one of the rotatable element and the anvil roll so as to bias the rotatable element and the anvil roll together. Further provided is a control system (90) coupled to the servo motor apparatus for varying the force applied by the servo motor apparatus to the at least one of the rotatable element and the anvil roll such that the outer circumferential portion of the rotatable element and the anvil roll engage and bond together predefined portions of the plural workpiece layers passing through the nip (60).