Abstract:
L'invention concerne une anche composite (55) pour instrument à vent et un procédé de fabrication d'une telle anche. L'anche présente une matrice faite d'un matériau polymère et une pluralité de fibres de renfort faites d'un autre matériau polymère, noyée à l'intérieur de ladite matrice. Ledit autre matériau polymère est un matériau polymère thermoplastique.
Abstract:
La présente invention concerne un produit composite résistant à la corrosion obtenu à partir de fils composites formés par un co-mêlage en phase d'étirage de filaments en une matière thermoplastique, et de filaments en une matière de renfort minérale et résistante à la corrosion basique et/ou acide, au moins une partie la matière thermoplastique étant fondue. La matière de renfort minérale comprend du verre AR, et le produit composite est choisi parmi l'un au moins des produits suivants: un produit composite obtenu à partir desdits fils composites sous forme de granulés, une grille, un tissu, un tricot multidirectionnel, une tresse, un ruban continu, un corps creux, un profilé pultrudé comme élément de charpente, de passerelle, comme renfort de structure composite, comme visserie, un produit moulé obtenu par un mat en les fils composites continus dans une matière thermoplastique fondue, un produit copultrudé obtenu à partir de bande(s) de tissus en lesdits fils composites et d'un faisceau en lesdits fils composites continus Elle concerne également l'utilisation de ce produit composite.
Abstract:
A wind turbine blade comprising a spar and a method of preparing these are provided. The spar comprises a laminated member having a surface to be connected to the surface shells of the blade reinforced by oriented first type fibres and the first type fibres are supported by second type fibres. Aspects concerning buckling, cross-sectional shape, twisting of fibres, straightness of fibres and electrical potential equalising are also considered. A band comprising fibres for electrical potential equalising is also provided. The wind turbine blade and elements of it will be appreciated for being relatively light, stiff and easy to manufacture, for example by automated processes.
Abstract:
A polyolefin plaque is made by hot compaction of an assembly of fibres of the oriented polymer. It has been found to be beneficial to subject the fibres to a prior cross-linking process. Hot compaction is then less temperature-sensitive and produces plaques with excellent hot strength properties. Preferably the fibres have been subjected to prior stages of irradiation and annealing, both in a non-oxidising environment, for example acetylene.
Abstract:
A polyolefin plaque is produced by hot compaction of an assembly of melt spun oriented fibres. It has been found that good compaction can be achieved at relatively low compaction pressures, less than 10 MPa. Compaction can be carried out in an autoclave, rather than in a hot compaction press, and the mechanical properties of plaques so produced range from good to excellent.
Abstract:
Polymeric monoliths having high stiffness and strength can be produced by heating an assembly of polymer fibres under a contact pressure to a temperature at which a proportion of the fibre is selectively melted and then compressing the assembly. Preferably at least 5 % of the polymer is melted so that on compression the molten materials fill the voids within the assembly. The use of polyolefin fibres especially melt spun polyethylene fibres is preferred. The products are useful e.g. as orthodontic brackets, bone prostheses and in body armour.
Abstract:
Methods for forming fiber reinforced polymer rod assemblies and fiber reinforced polymer rod assemblies are disclosed. In one embodiment, the method includes heating a portion of a first fiber reinforced polymer rod and heating a portion of a second fiber reinforced polymer rod. The method further includes intertwining the portions of the first fiber reinforced polymer rod and the second fiber reinforced polymer rod to form a rod connecting section. The method further includes aligning the first fiber reinforced polymer rod and the second fiber reinforced polymer rod along a linear axis. The method further includes cooling the portions of the first fiber reinforced polymer rod and the second fiber reinforced polymer rod.
Abstract:
The invention provides a thermoplastic film comprising: a base film wherein the base film comprises a stretchable polyolefin material comprising one or more layers; and a plurality of extruded fibre elements; wherein the extruded fibre elements are located on at least one surface of the base film; wherein the extruded fibres form one or more protrusions relative to the plane of the base film; wherein at the location where the fibre elements are provided on the base film, a domain of a material mixture comprising the base film material and the fibre material is present between a domain of pure base film material and a domain of pure fibre material, and wherein the average thickness of the base film is less than the average thickness of the protrusion.
Abstract:
An elastic laminate for use as a tear resistant diaper side panel. The elastic laminate comprises an elastic substrate bonded to at least one layer of a tensioned spunbond nonwoven web comprising thermoplastic filaments comprising at least about 10% by weight polyethylene. The laminate is then incrementally stretched in the transverse direction to provide a service stretch greater than 100% and a strength ratio greater than 0.35. In one embodiment, the elastic substrate is bonded between the tensioned nonwoven webs by point bonding or hot melt adhesives. Also disclosed is a method for making an elastic laminate comprising the steps of providing at least one layer of a tensioned spunbond nonwoven web comprising thermoplastic filaments comprising at least about 10% by weight polyethylene, providing an elastic substrate, bonding the elastic substrate and the at least one layer of nonwoven web to provide an elastic laminate, and incrementally stretching the laminate in the transverse direction to provide a service stretch greater than 100% and a strength ratio greater than 0.35.
Abstract:
The present invention is directed to a high surface area fiber and textiles made from the same. In one preferred embodiment the fiber has a middle region with a plurality of projections that define a plurality of channels, which increases the surface area of the fiber. In one preferred embodiment, the fiber has a specific surface area of about 140,000 cm2 /g or higher and a denier of about 1.0 to about 2.0. The fiber of the present invention is made using a bicomponent extrusion process using a thermoplastic polymer and a dissolvable sheath.