摘要:
The invention relates to a material sheet comprising at least one monolayer, wherein at least one monolayer comprises a plurality of drawn unidirectional polymer fibers having a strength of greater than 1.2 GPa, characterised in that the at least one monolayer has a thickness of less than 100 µm and the material sheet comprises a bonding agent of less than 13wt% relative to the total weight of the material sheet.
摘要:
The present invention relates to a method of producing a high strength and high modulus elongated product comprising the steps of (a) making a composition comprising a semi-crystalline polymer and carbon nanotubes, (b) extruding said composition into an elongated product, and (c) stretching the product below the melting point of the polymer, wherein in step (a) the composition is a colloidal dispersion of nanotubes in a solution of the polymer. The advantages of the invention include production of elongated products, like fibres with higher tensile properties, especially strength, with a lower concentration of nanotubes than with a known method. The invention also concerns a high strength elongated product containing nanotubes obtainable by the method according to the invention, especially a polyolefin fibre containing nanotubes having a tensile strength of higher than 3.0 GPa. The invention also relates to a process for making composite articles wherein high strength elongated products, preferably fibres, according to the invention are used and to anti-ballistic composites comprising said products.
摘要:
The invention relates to a multilayered material sheet comprising a consolidated stack of unidirectional monolayers of drawn polymer, whereby the draw direction of two subsequent monolayers in the stack differs. At least one monolayer comprises a plurality of unidirectional tapes of the drawn polymer, aligned in the same direction, whereby adjacent tapes do not overlap. The invention also relates to a process for the preparation of the multilayered material sheet, and to a ballistic resistant article comprising the multilayered material sheet.
摘要:
The invention relates to a process for making a polyethylene multi-filament yarn comprising the steps of a) spinning multiple filaments from a solution comprising between 0.5 and 30 mass% of ultra high molecular weight polyethylene in a solvent; b) cooling the filament obtained to form gel filaments; c) removing at least partly the solvent from the gel filaments; d) drawing the filaments in at least one drawing step with a draw ration of more than 15 before, during or after removing solvent to a strength of at least 1 GPa, characterized in that the solution further comprises between 0.1 and 7 mass% of a sorbitol derivative. The invention further relates to a high performance polyethylene multi-filament yarn having a strength of at least 1 GPa, characterized in that the yarn comprises between 0.1 and 5 mass% of a sorbitol derivative.
摘要:
The invention relates to a multilayered material sheet comprising a consolidated stack of unidirectional monolayers of drawn polymer, whereby the draw direction of two subsequent monolayers in the stack differs. At least one monolayer comprises a plurality of unidirectional tapes of the drawn polymer, aligned in the same direction, whereby adjacent tapes do not overlap. The invention also relates to a process for the preparation of the multilayered material sheet, and to a ballistic resistant article comprising the multilayered material sheet.
摘要:
The present invention relates to a process for the production of an isotropic polymeric network comprising multifunctional molecules with a functionality, n, of at least 5 by contacting in a solvent an amount of the multifunctional molecules with an amount of a coupling agent, whereby through supramolecular chemistry a bond between the multifunctional molecule and the coupling agent is formed. The invention furthermore relates to an isotropic polymeric network with a density lower than 1300 kg/m 3 and a specific Young's modulus of at least 0.007 GPa.m 3 /kg, shaped articles hereof and the use of the isotropic polymeric network as construction material.
摘要翻译:本发明涉及生产各向同性聚合物网络的方法,其包括通过在溶剂中使一定量的多官能分子与一定量的偶联剂接触而具有官能度n至多为5的多官能分子,由此通过超分子 形成多功能分子与偶联剂之间的化学键。 本发明还涉及密度低于1300kg / m 3,特定杨氏模量至少为0.007GPa.m 3 / kg的各向同性聚合物网络,其成型制品和 各向同性聚合物网络作为建筑材料。
摘要:
Closed loop of high performance polyethylene fibers for use as a bone-fixing tool, and method for fixing bone parts by a surgical cable comprising the steps of laying the surgical cable, having two end parts, around at least part of the bone parts to be fixed, exerting a force on the end parts bringing the cable under a tension required for the fixing of the bone parts and locking the tensioned cable against the influence of forces acting counter to the exerted force.
摘要:
The invention relates to a multilayered material sheet comprising a consolidated stack of unidirectional monolayers of drawn polymer, whereby the draw direction of two subsequent monolayers in the stack differs. At least one monolayer comprises a plurality of unidirectional tapes of the drawn polymer, aligned in the same direction, whereby adjacent tapes do not overlap. The invention also relates to a process for the preparation of the multilayered material sheet, and to a ballistic resistant article comprising the multilayered material sheet.
摘要:
The invention relates to a material sheet comprising at least one monolayer, wherein at least one monolayer comprises a plurality of drawn unidirectional polymer fibers having a strength of greater than 1.2 GPa, characterised in that the at least one monolayer has a thickness of less than 100 µm and the material sheet comprises a bonding agent of less than 13wt% relative to the total weight of the material sheet.
摘要:
Bone fixing device comprising a surgical cable having a first and a second end and at least two fixing plates having a central hole and a ring surrounding the hole, the ring having an inner edge adjacent to the hole and an outer edge along a circumference of the fixing plate, the two fixing plates being in a stacked position leaving a gap between them and the holes at least partly overlapping each other, at least one end of the cable following a continuous trajectory comprising a first upward part (a) running through the hole, an outward part (b) running over one ring in the direction of its outer edge, a downward part (c) outside the outer edge running in a direction opposite to the upward part, a second upward part (d) running through the hole in the first direction and a part (e) running through the gap between the fixing plates, the other end also being connected to the fixing plates.