The subject invention is directed to fibers and polymer blend compositions having improved bonding performance. In particular, the subject invention pertains to a multiconstituent fiber comprising a blend of a polypropylene polymer and a high molecular weight (i.e. low melt index or melt flow) ethylene polymer. The subject invention further pertains to the use of the fiber and polymer blend composition which has improved bonding performance in various end-use applications, especially woven and nonwoven fabrics such as, for example, disposable incontinence garments and diapers. The fibers have good spinnability and provide fabrics having improved bond strength and elongation.

Polypropylene/ethylene polymer fiber having improved bond performance and composition for making the same

Granular magnetite particles useful as coloring pigments assuming a black color and containing elemental aluminum, 3 to 6 wt %, in the magnetite crystal lattice. The magnetite has a spinel structure with a lattice constant of 8.340 to 8.375 Å.

Coated granular magnetite particles and process for producing the same

An environmentally friendly method and composition is provided for removing hydrogen sulphide from fluids at high pH The method and composition are particularly suited for removing hydrogen sulphide from drilling fluids used in drilling boreholes in hydrocarbon bearing subterranean formations, and are suitable for use with any drilling fluid, including polymer based drilling fluids The sulphide scavenger used in the method and composition is a ferrous gluconate, an organic iron chelating agent stable at pH as high as 115, the pH preferred for drilling fluids that may encounter hydrogen sulphide Further, this additive has been found to enhance the resilience of the rheological properties of drilling fluids to hot rolling and comparable field conditions

Method and composition for scavenging sulphide in drilling fluids and composition

Monolithic metal oxide structures, and processes for making such structures, are disclosed. The structures are obtained by heating a metal-containing structure having a plurality of surfaces in close proximity to one another in an oxidative atmosphere at a temperature below the melting point of the metal while maintaining the close proximity of the metal surfaces. Exemplary structures of the invention include open-celled and closed-cell monolithic metal oxide structures comprising a plurality of adjacent bonded corrugated and/or flat layers, and metal oxide filters obtained from a plurality of metal filaments oxidized in close proximity to one another.

Thin-walled monolithic metal oxide structures made from metals, and methods for manufacturing such structures

This invention relates to a method of making a film-fabric composite (including a film-fabric laminate) wherein the fabric is characterized as having improved tensile elongation (without rupture). In particular, the invention pertains to a method of making a film-fabric laminate having structural elastic-like behavior wherein the fabric is a nonwoven thermally bonded fabric characterized as having improved high strain rate tensile elongation and comprises a plurality of fibers comprised of at least one polypropylene polymer and at least one ethylene polymer, wherein the method comprises stretching the laminate at a high strain rate. The improved fabric is characterized by higher high strain rate tensile properties and a broader bond window which is also shifted to substantially lower temperatures with regard to maximum tensile properties. The improved fabric enables higher stretching levels or speeds on stretching apparati often employed to impart elasticity or elastic-like behavior to inelastic polymeric materials. Polypropylene copolymers as well as polypropylene homopolymers may be used in the invention which is useful for durable and disposable articles such as diapers, bandages, pantiliners, continence pads, and sanitary napkins.

Method of making a polypropylene fabric having high strain rate elongation and method of using the same

Disclosed herein are magnetic iron oxide particles which have a spindle shape and a substantially uniform particle size and shape, and are substantially free of dendrites and have a large axial ratio (major axial diameter/minor axial diameter) and an excellent print-through characteristic, and a method of producing the same.

Magnetic iron oxide particles and method of producing the same

Disclosed herein are a process for producing acicular goethite particles comprising the steps of: blowing an oxygen-containing gas into a ferrous salt reaction solution containing colloidal ferrous hydroxide or iron-containing colloidal precipitates which is obtained by reacting an aqueous ferrous salt solution with less than one equivalent of an aqueous alkali hydroxide solution and/or an aqueous alkali carbonate solution based on Fe 2 + in said aqueous ferrous salt solution so as to oxidize said colloidal ferrous hydroxide or iron-containing colloidal precipitates and to produce acicular goethite nucleus particles, adding to the resultant aqueous ferrous salt reaction solution containing said acicular goethite nucleus particles not less than one equivalent of an aqueous alkali carbonate solution based on Fe 2 + in said aqueous ferrous salt reaction solution, and blowing an oxygen-containing gas into the mixed aqueous ferrous salt reaction solution so as to grow said goethite nucleus particles; and a process for producing acicular magnetic iron oxide particles by reducing the acicular goethite particles obtained in the above process to produce acicular magnetite particles, and if necessary, oxidizing the acicular magnetite particles to obtain acicular maghemite particles, and if necessary, modifying the acicular magnetite or maghemite particles with Co or Co and Fe 2 +.

Process for producing acicular goethite particles and acicular magnetic iron oxide particles

Disclosed herein is a process for producing acicular magnetic iron oxide particles comprising the steps of: mixing an aqueous dispersion of acicular magnetic iron oxide particles with an aqueous solution of a Co salt and an alkaline aqueous solution, or an aqueous solution of a Co salt, an aqueous solution of an Fe(II) salt and and an alkaline aqueous solution; and heat-treating the alkaline suspension solution obtained at 50° to 100° C.; wherein an Sr salt, a Ba salt or an Sr salt and a Ba salt is added to one selected from the group consisting of said aqueous dispersion of acicular magnetic iron oxide particles, said aqueous solution of a Co salt, said aqueous solution of an Fe(II) salt, said alkaline aqueous solution and said alkaline suspension solution before heat-treatment, and at least one selected from the group consisting of Si compound, Al compound, Zn compound and Mg compound is added to one selected from the group consisting of said aqueous dispersion of acicular magnetic iron oxide particles, said aqueous solution of a Co salt, said aqueous solution of an Fe(II) salt, said alkaline aqueous solution, said alkaline suspension solution before heat-treatment and said alkaline suspension solution during heat-treatment.

Acicular magnetic iron oxide particles

A process for producing acicular magnetic iron oxide particles which process comprises
 (i) mixing (A) an aqueous dispersion of precursor acicular magnetic iron oxide particles, (B) an aqueous solution of a Co salt, (C) an alkaline aqueous solution and optionally (D) an aqueous solution of an Fe(II) salt to form (E) an alkaline suspension, (ii) heat-treating solution (E) at from 50 to 100°C; (iii) adding an Sr salt and/or a Ba salt to (A), (B), (C), (D) or, before the heat-treatment, (E); (iv) and adding at least one Si compound, Al compound, Zn compound or Mg compound to (A), (B), (C), (D) or, before or during the heat-treatment, (E).

Process for producing acicular magnetic iron oxide particles for magnetic recording

PURPOSE:To produce magnetic iron oxide powder having uniform particle size and fusiform particle shape by reacting an aqueous solution of a ferrous salt with an alkali metal carbonate, treating the obtained fusiform goethite particles with a Zn compound and a P or Si compound and subjecting the product to dehydration, heating and reduction. CONSTITUTION:An aqueous solution of a ferrous salt is reacted with an alkali metal carbonate or an alkali metal carbonate-alkali metal hydroxide in wet state to form goethite particles having fusiform particle shape. After the completion of the above reaction, a Zn compound is added and mixed to the reaction mother liquor in an amount of 0.3-10.0wt.% in terms of Zn based on the goethite particle. The obtained particles are separated by filtration, washed with water and suspended in water. The suspension is incorporated with 0.1-3.0wt.% (in terms of PO3) of a P compound or 0.1-3.0wt.% (in terms of SiO2) of an Si compound. The particles are separated by filtration, washed with water, dried and subjected to dehydration, heating and reduction and, as necessary, the product is oxidized. Magnetite particles or, as necessary, maghematite particles having fusiform particle shape and free from dendrite particle can be produced by this process.

Kazuhiro Fujita

Papers

Magnetic iron oxide particles and method of producing the same

Process for producing acicular goethite particles and acicular magnetic iron oxide particles

Acicular magnetic iron oxide particles

Process for producing acicular magnetic iron oxide particles for magnetic recording

Production of fusiform magnetic iron oxide particulate powder