摘要:
A die assembly (10) for extruding a polymeric coating onto a wire so as to impart a matte finish to the coating surface is provided. The die assembly (10) comprises: A) a die tip (13) comprising a tubular channel (22) through which a wire can pass, the channel (22) positioned along the central longitudinal axis (26) of the die assembly (10); B) a die body (12) comprising a trunk (15) and a head (16), the head (16) comprising a tubular channel (20), the head tubular channel (20) comprising a die land (21), the trunk (15) positioned about the die tip (13) so as to define an annular space (25) between the exterior surface (23) of the die tip (13) and the interior surface (24) of the trunk (15); C) a die holder (11) positioned about and in contact with the exterior surface (17) of the trunk (15); and D) a radiator (14) positioned about and in contact with the exterior surface (19) of the die land (21) of the die head (16).
摘要:
The present invention is a flame-retardant polyolefin/thermoplastic polyurethane formulation made from or containing a polyolefin, a thermoplastic polyurethane, and an intumescent, polyphosphate flame retardant composition. The invented system achieves elongations >400% and tensile strengths >1500 psi while the same polyolefin only achieved 100% elongation and
摘要:
The present invention is a flame-retardant polyolefin/thermoplastic polyurethane formulation made from or containing a polyolefin, a thermoplastic polyurethane, and an intumescent, polyphosphate flame retardant composition. The invented system achieves elongations>400% and tensile strengths>1500 psi while the same polyolefin only achieved 100% elongation and
摘要:
Magnesium oxide (MgO) compounded into a polymer can subsequently be hydrated in-situ within the polymer to form magnesium hydroxide. In the case of silane-based or peroxide-based crosslinkable resins, the MgO hydration and polymer crosslinking can be done in a single process step, or in sequential steps. In the case of non-crosslinkable compounds, hydration can be carried out after compounding (no crosslinking step). In all cases, steam CV, sauna, or hot water bath are options for hydration. This approach enables preparation of polymer compounds that are flame retarded with metal hydrates yet free of the traditional limitations posed by shelf instability, extrusion scorch, undesired dehydration, and processing temperature limitations posed by metal hydrates.
摘要:
An article of manufacture comprising (i) a plurality of electrical conductors having interstices therebetween, each conductor being surrounded by one or more layers of a composition comprising (a) one or more polyolefins and, blended therewith, (b) a mixture containing one or more alkylhydroxyphenylalkanoyl hydrazines and a defined functionalized hindered amine; and (ii) hydrocarbon cable filler grease within the interstices.
摘要:
An extruder assembly for admixing and reacting a hydrolyzable silane reactant with a thermoplastic polymer to produce a water-curable, silane modified polymer and for extruding the resultant polymer into a shaped product.
摘要:
Color-stable, halogen-free, flame retardant composition comprise, based on the weight of the composition: A. 10-95 weight percent of a thermoplastic polyurethane polymer; B. 3-50 weight percent of a phosphorus-based flame retardant; and 0.1-10 weight percent of a low molecular weight epoxide additive other than a novolak polymer or an olefin-based polymer comprising an epoxy group.
摘要翻译:颜色稳定的无卤阻燃组合物基于组合物的重量包含:A. 10-95重量%的热塑性聚氨酯聚合物; B. 3-50重量%的磷基阻燃剂; 和0.1-10重量%的除酚醛清漆聚合物或包含环氧基的烯烃基聚合物之外的低分子量环氧化物添加剂。
摘要:
The present invention is a plenum cable component with excellent fire retardant and aging properties. The plenum cable component is prepared from a polyolefin-based composition, containing an olefinic polymer and a surface treated metal hydroxide. Depending upon the surface treatment, the composition may comprise other components. The present invention is also a method for selecting a composition for preparing the plenum cable component as a separator and a method for preparing a communications cable therefrom.
摘要:
The present invention is a cable comprising one or more telecommunication or power transmission media or a core of two or more such media, each medium or core surrounded by at least one jacketing or sheathing layer comprising a polypropylene homopolymer or copolymer and having a relaxation spectrum (RSI) and melt flow (MF) such that RSI*MF^a is greater than about 12 when a is about 0.5.
摘要:
An article of manufacture comprising, as a first component, a plurality of electrical conductors, each surrounded by one or more layers of a mixture comprising one or more polyolefins and the reaction product of a compound containing a sterically hindered amine or phenol and a quinone compound, and, as a second component, hydrocarbon cable filler grease within the interstices between said surrounded conductors.