Fabrication of composite structures

    公开(公告)号:US20170080644A1

    公开(公告)日:2017-03-23

    申请号:US14756567

    申请日:2015-09-18

    摘要: Yarns for use in manufacture of composite structures are intermittently coated with adhesive, and may be twisted as well. These yarns are then woven into fabric, and heat and pressure applied to the intermittently-coated yarns to provide dimensional stability and to prevent unravelling of the fabric during cutting and handling. The fabric is then disposed in a mold or over a mandrel, and a curable resin applied and caused to cure. Provision of the adhesive in intermittent fashion limits propagation of cracks that may form at the location of the adhesive, which does not bond well to the curable resin.

    Coated fibers for enhanced concrete structural reinforcement

    公开(公告)号:US20190256418A1

    公开(公告)日:2019-08-22

    申请号:US16350326

    申请日:2018-11-05

    发明人: Michael A. Riley

    摘要: Fibers to be added to concrete to improve its properties are coated with an alkali-insoluble polymer, to provide adhesion of the fibers to the concrete. In a further improvement, nanoparticles are dispersed in an alkali-soluble polymer coating, and this is used to coat the fibers. When the fibers are mixed into the concrete mix, the nanoparticles are dispersed throughout the concrete, avoiding problems from agglomeration of the nanoparticles if simply added to the concrete mix.

    Fabrication of composite structures

    公开(公告)号:US09931794B2

    公开(公告)日:2018-04-03

    申请号:US14756567

    申请日:2015-09-18

    IPC分类号: B29C70/22 B29C70/54 D06B3/06

    摘要: Yarns for use in manufacture of composite structures are intermittently coated with adhesive, and may be twisted as well. These yarns are then woven into fabric, and heat and pressure applied to the intermittently-coated yarns to provide dimensional stability and to prevent unravelling of the fabric during cutting and handling. The fabric is then disposed in a mold or over a mandrel, and a curable resin applied and caused to cure. Provision of the adhesive in intermittent fashion limits propagation of cracks that may form at the location of the adhesive, which does not bond well to the curable resin.