Teijin Aramid B.v.

Teijin Aramid Gmbh

Huibert Kwint

Stephanus Willemsen

Marc-Jan De Haas

Peter Gerard Akker

Hendrik Swierenga

Hans-Joachim Gabrisch

Sonja Sas

Stef Willemsen

Adrianus Johannus Wilhelmus Van Haren

Douwe Dros

Mattheus Van Leeuwen

A method for stranding aramid yarn around an endless core includes a stranding step that involves a stranding apparatus having at least one yarn bobbin. The bobbin revolves around its own axis and the bobbin revolves around the core, wherein the yarn unwinds from the bobbin and winds around the core. The yarn is a continuous aramid yarn provided with 0.05 to 0.95 wt %, based on the weight of the aramid, of a finish including an organophosphorus compound. The organophosphorus compound is a compound of the formula X1X2X3P&#x2550;O. X1, X2, and X3 are independently selected from Y1-, Y1-O&#x2014;, and M-O. Y1 is a branched or straight-chain C1-C20 alkyl, aryl or alkenyl. M is selected from Li, Na, K, or ammonium. At least one of X1, X2, or X3 is selected from Y1- or Y1-O&#x2014;.

Method for high speed stranding of aramid yarns

Linear tension member having multiple fibers and at least 0.1 wt % of solid hydrophobic organic nanoparticles with a mean diameter of 10-300 nm and a standard deviation &#x3c3; of at least 10% of the mean value, which linear tension member has a linear mass density of at least 10.000 dtex and has at least 80 wt % of fibers having a mass density higher than 1 g/cm. The disclosure also pertains to the use of such particles for making a linear tension member buoyant and to a process to manufacture a floating linear tension member.

Floating linear tension member comprising multiple fibers

A method for making a flexible fibrous continuous tape containing 60 to 98 wt % fiber based on the weight of the tape, from multifilament yarn selected from aramid, glass, aromatic polyester, and rigid rod polymer, comprising the steps: a1) spreading the filaments of the yarn to obtain a filament layer having a cross sectional aspect ratio (w/h) of 2 to 2000; and b1) treating the spread filaments with a curable resin, or a liquid thermoplastic resin or wax; or a2) treating the yarn with the curable resin, or the liquid thermoplastic resin or wax; and b2) spreading the filaments of the yarn to obtain a filament layer having a cross sectional aspect ratio (w/h) of 2 to 2000; followed by c) fixating the filaments by curing or solidifying the resin to obtain the tape, wherein steps a1-b1, respectively a2-b2, and c are performed in-line.

Flexible continuous tape from multifilament yarn and method for making these

Growing community of inventors

Veenendaal, Netherlands

Huibert Kwint