Abstract:
The present invention relates to a chain comprising a plurality of chain links comprising a polymeric fiber and wherein said chain comprises at least one spacer having a thickness Δ at the contact location through which loads are directly transmitted between said chain links and a ratio Δ/τ=f, with τ being the thickness of any of the chain links at the contact location through which loads are directly transmitted between said chain links and f being in a range between 0.10 and 2.50. The invention further relates to the use said chain for storing, securing, lashing and tying down for handling and transporting cargo, in lifting and hoisting, logging, hauling and rigging, propulsion and driving, mooring, cargo-hold of an aircraft or naval ship.
Abstract:
The invention relates to a multilayered material sheet comprising a consolidated stack of unidirection monolayers of drawn ultra high molecular weight polyolefine. The draw direction of two subsequent monolayers in the stack differs. Moreover the thickness of at least one monolayer does not exceed 50 μm, and the strength of at least one monolayer is comprised between 1.2 GPa and 3 GPa. The invention also relates to a ballistic resistant article comprising the multilayered material sheet and to a process for the preparation of the ballistic resistant article.
Abstract:
Gel-spinning processes for producing a high tensile strength ultra high molecular weight polyethylene (UHMWPE) multifilament yarn comprising ultra-low dtex filaments, include applying a draw ratio DRfluid to fluid filaments obtained by spinning a solution of UHMWPE through a spinneret and into an air gap, is at least 450, wherein DRfluid=DRsp×DRag, the DRsp and DRag being the draw ratios in the spinholes and in the air gap, respectively; and provided that DRag is at least 30. The UHMWPE multifilament yarns produced thereof were characterized by a tensile strength of at least 3.5 GPa and contained filaments having a dtex of at most 0.5. The invention further relates to products comprising said yarns, e.g. fabrics, medical devices and composite and ballistic articles.
Abstract:
The invention relates to a method for manufacturing a composite sheet comprising high performance polyethylene fibres and a polymeric resin comprising the steps of assembling HPPE fibres to a sheet, applying an aqueous suspension of a polymeric resin to the HPPE fibres, partially drying the aqueous suspension, optionally applying a temperature and/or a pressure treatment to the composite sheet wherein the polymeric resin is a homopolymer or copolymer of ethylene and/or propylene. The invention further relates to composite sheets obtainable by said method and articles comprising the composite sheet such as helmets, radomes or a tarpaulins.
Abstract:
The invention relates to a heavy-duty chain containing chain-links comprising synthetic polymeric yarns, wherein when said chain is kept at least taut onto an essentially planar surface, each chain-link has an orthographic projection onto said planar surface, said projection having a foot print area (A), wherein the foot print areas denoted as A1 and A2 of every two adjacent links are in a relation 80% A2≦A1≦100% A2 with A1 being the smallest of said two areas and wherein the projection is done in such a way that the ratio of the foot print areas A2 to A1 is maximized.
Abstract:
The invention relates to a heavy-duty chain containing chain-links comprising synthetic polymeric yarns, wherein when said chain is kept at least taut onto an essentially planar surface, each chain-link has an orthographic projection onto said planar surface, said projection having a foot print area (A), wherein the foot print areas denoted as A1 and A2 of every two adjacent links are in a relation 80% A2≦A1≦100% A2 with A1 being the smallest of said two areas and wherein the projection is done in such a way that the ratio of the foot print areas A2 to A1 is maximized.
Abstract:
Composite panel comprising at least one layer containing at least one tape comprising a thermoplastic polymer selected from the group consisting of polyolefins, polyesters, polyvinyl alcohols, polyacrylonitriles, polyamides or polyketone, wherein the tape has a tensile strength of at least 1.2 GPa and an areal density of between 5 and 150 g/m2, and an adhesive in contact with said layer, whereby the amount of the adhesive in contact with one side of the at least one layer is between 0.2 and 15 g/m2, wherein the adhesive is a plastomer wherein said plastomer is a random copolymer of ethylene or propylene and one or more C2 to C12 a-ol-efin co-monomers and wherein said plastomer has a density as measured according to 1801183 of between 860 and 930 kg/m3. In a preferred embodiment the tape comprises an ultra high molecular weight polyethylene. The composite panel is used in a ballistic resistant article.
Abstract translation:复合板包括至少一层含有至少一层包含选自聚烯烃,聚酯,聚乙烯醇,聚丙烯腈,聚酰胺或聚酮的热塑性聚合物的胶带,其中胶带的拉伸强度至少为1.2GPa, 5至150g / m 2的密度和与所述层接触的粘合剂,由此与至少一层的一侧接触的粘合剂的量为0.2至15g / m 2,其中粘合剂为 塑性体,其中所述塑性体是乙烯或丙烯的无规共聚物和一种或多种C 2 -C 12α-烯烃共聚单体,并且其中所述塑性体具有根据1801183测得的密度为860和930kg / m 3之间的密度。 在优选的实施方案中,带包含超高分子量聚乙烯。 复合板用于防弹制品。