Welding method
    15.
    发明授权

    公开(公告)号:US11279096B2

    公开(公告)日:2022-03-22

    申请号:US16580500

    申请日:2019-09-24

    申请人: TPU PLUS GMBH

    发明人: Patrick Mattfeld

    摘要: A method for welding a first hose end at a joint with a second hose end in a seam that extends on a circumference of the first hose end, the method comprising the steps: applying a protective layer at the joint to an inside of the first hose end; pushing the second hose end beyond the joint over the first hose end; pressing the first hose end and the second hose end together flat at the joint between two first damping jaws that are moved towards each other; welding the first hose end and the second hose end together by two first partial seams while pressed together, wherein the protective layer prevents a welding of the inside of the first hose end; releasing the first hose end and the second hose end from the two first clamping jaws after welding the two first partial seams.

    Multilayer polyurethane protective films

    公开(公告)号:US11260631B2

    公开(公告)日:2022-03-01

    申请号:US15142695

    申请日:2016-04-29

    申请人: DESIGN BLUE LTD.

    摘要: The present invention relates to multilayer films used to protect a surface, in particular, to such films used to protect surfaces of articles e.g., mobile electronics display protections, smartphones, tablets), industrial touch screens (e.g. machine interfaces), UV stable surfaces and glass protections for machine housings and cockpits (e.g. caterpillars, dumpers), etc.), and, more particularly, to such a multilayer protective film backed by a silicone-based pressure sensitive adhesive (PSA) and having either an aliphatic polyurethane layer or an aliphatic thermoplastic polyurethane layer on top of an aliphatic thermoplastic polyurethane layer, where the two aliphatic polyurethane layers have different physical and/or chemical properties. The present invention also relates to an article that is protected by the multilayer film as well as a method for making the multilayer protective film.