Abstract:
The invention pertains pipe-like hollow article comprising ultra-high molecular weight polyethylene (UHMWPE) tapes and a resin, whereby in the article the tapes are arranged to create the article, wherein the main extension direction of at least 10 wt% of the tapes in the article is in the range of 15 to -15° with regard to the extension direction of the article and wherein the tapes have a 200/110 uniplanar orientation parameter of at least 3 and wherein the ratio of [length of the article] to [average inner cross sectional diameter of the article] is at least 5. Further aspects of the invention pertain to processes for manufacturing such an article and to sports equipment comprising said article.
Abstract:
The invention relates to a tape, comprising at least one layer comprising a. endless fiber in an total amount of at least 40 volume % as compared to the total volume of the layer and b. a thermoplastic matrix comprising one or more polyamides containing one or more aliphatic monomeric units, c. and optionally heat stabilizer, flame retardant, colorant, lubricant, mold release agent, UV stabilizer, impact modifier, laser absorbing additive as well as combinations thereof; wherein the one or more polyamides have a CH2-ratio of at least 5.5 and less than 10, calculated by - identifying the number of different aliphatic monomeric units in the one or more polyamides; - determining the number of CH2 groups per aliphatic monomeric unit for each of these different aliphatic monomeric units; - calculating the sum of the so determined numbers of CH2 groups; - dividing said sum by the number of different aliphatic monomeric units in the one or more polyamides; taking into account only the aliphatic monomeric units present in the one or more polyamides in an amount of at least 10 wt% with respect to the total weight of the one or more polyamides. The invention also relates to a vessel prepared by employing these tapes.
Abstract:
A sports article comprising an elongate tubular shaft comprised of a fiber-reinforced resin matrix composite material, wherein the elongate tubular shaft has a longitudinal direction and the shaft is multilaminar and includes at least two fibrous layers, each of which is helically wrapped about a wrapping direction extending along the longitudinal direction to form the elongate tubular shaft, wherein each fibrous layer comprises a plurality of oriented structural fibers which are substantially aligned along the longitudinal direction so as to be oriented within +/- 10° of the longitudinal direction, the oriented structural fibers having a length, along the longitudinal direction, of less than the length of the elongate tubular shaft to form discontinuous structural fibers serially oriented along the elongate tubular shaft. Also dislcosed is a method to produce such a multilaminar elongate tubular shaft.
Abstract:
A fiber preform architecture and method of making, including a plurality of fiber bands (52). Each band of the plurality of fiber bands is placed at a time, at a predetermined position and orientation, to generate an interwoven and interlocking pattern between the fiber bands. Each of the plurality of fiber bands is formed of a plurality of fiber tows (50), positioned side by side at a predetermined spacing (x) to define one or more gaps between each tow in the fiber band and define a secondary based interleaving within each of the fiber bands. The plurality of fiber bands are interwoven in an in-plane and out-of-plane orientation by interleaving each of the plurality of fiber bands with one or more of the plurality of fiber bands previously laid down and not in a common plane. The plurality of fiber bands include three or more different orientation angles and provide uniformity in coverage.
Abstract:
L'invention concerne un procédé de mesure de l'épaisseur d'une texture fibreuse (18) enroulée sur un mandrin d'imprégnation (16) pour la fabrication d'une pièce annulaire de structure de turbomachine en matériau composite, comprenant, préalablement à l'enroulement de la texture fibreuse, une étape d'acquisition d'une distance de référence (do) entre une surface extérieure (24) du mandrin d'imprégnation et un capteur de distance (34) positionné en regard de ladite surface extérieure du mandrin d'imprégnation, au cours de l'enroulement de la texture fibreuse, une étape d'acquisition d'au moins une distance réelle (d(t)) entre le capteur de distance et la surface extérieure de la texture fibreuse enroulée sur le mandrin d'imprégnation, et une étape de calcul de l'épaisseur réelle de la texture fibreuse enroulée sur le mandrin d'imprégnation par soustraction entre la distance réelle et la distance de référence. L'invention concerne également une machine d'enroulement comprenant des moyens de mise en œuvre d'un tel procédé.
Abstract:
A fluid conduit includes a flexible member having a tubular wall for conveying a fluid and a circumferential structural member positioned adjacent to the tubular wall. The structural member is disposed about a central axis of the conduit so as to form a plurality of spaced segments along the wall. The segments are spaced apart relative to each other to define a gap therebetween. The gap is sized to be closed by contact between adjacent segments upon a predetermined flexure of the flexible member. A method of forming the fluid conduit includes forming a flexible member with a tubular wall and forming a groove about a central axis of the conduit in a portion of the tubular wall. The groove is formed by removing material from the tubular wall or compressing material on the tubular wall.
Abstract:
The subject of this invention is a method to produce plastic tube (1) and according to this method the material of the plastic tube is fed around a core (2) that has the same diameter as the inside diameter of the tube, and the material is fed as ail uninterrupted material flow so that the material flow, after having settled upon the core, goes forward following essentially the helical line in the side direction (x) of the core inside a mold (4) that has been mounted on the core. The plastic tube is formed of the material ribbons (3) and of the melted plastic material (5) that is to be fed to the spaces between the ribbons. The round and rising sheet (4.3) at the end of the mold directs the material flow to the side direction (x) of the core and the head of the plastic tube (1.1) gets welded and fixed to the starting tube (7) that is used to draw the tube as the production process advances in the side direction (x) of the core.
Abstract:
Apparatus and methods are provided for making coated liners and/or tubular devices including such coated liners. A sleeve may be provided that includes an outer first surface and an inner second surface extending between first and second ends thereof, and a hydrophilic or other coating may be applied to the first. The coated sleeve may be cut between the first and second ends to create opposing edges extending between the first and second ends, and the cut sleeve may be reversed such that the coated first surface defines an inner surface and the opposing edges are disposed adjacent one another, thereby providing a coated liner. Optionally, a tubular structure, e.g., one or more reinforcing layers and/or or outer layers may be attached around the coated liner, thereby providing a tubular device including an inner surface with a desired coating.
Abstract:
A mandrel for manufacturing hose, comprising a mandrel body, around which the hose may be arranged, and means for adjusting the diameter of the mandrel body.
Abstract:
A hybrid bearing cylinder having a composite sleeve and a metallic jacket positioned around the composite sleeve and secured thereto. The hybrid bearing cylinder is adapted to be secured to metallic cylinder end caps by threading, welding, swaging or other metal attachment methods.