Utilizing diverse solid particles

The present invention is directed to an improved cutting tool blank formed by hot pressing a mixture of finely divided high-purity alumina and from about 0.05% to 0.35% of magnesia. Up to 0.10% nickel oxide may be present. The hot pressing temperatures are effected at a temperature in the range of about...     

A dense silicon carbide material having improved electrically conducting properties is disclosed which is prepared by forming a homogeneous dispersion of silicon carbide, a sufficient amount of a boron containing additive, and 3.5-10.0% by weight of silicon nitride and hot pressing the dispersion at...     

A method of making a decorative particleboard incorporating colored wood particles. The colored particles either make up the entire board or form a surface layer only. Some or all of the particles are colored one or more different colors. In other respects the method of manufacture may be similar to...     

Process for the production of non-woven textile fabric from non-woven fabric waste material in which the waste is mechanically reduced to a particle size of less than three-fourth inch, preferably less than one-half inch and more preferably to a size of three-sixteenth to three-eighth inch, and reused,...     

A ceramic material includes at least 90% of a single phase silicon aluminum oxynitrite having the general formula: --Si.sub.6.sub.-z Al.sub.z N.sub.8.sub.-z O.sub.z -- where z is greater than 0 and less than or equal to 5. One method of producing the ceramic material involves sintering a mixture including...     

Expanded perlite particles and vermiculite particles are treated with an acid solution and then with waterglass. The moist material is introduced into any insulating cavity and allowed to dry, whereupon it self-adheres into a solid insulating sheet which also adheres to the surrounding cavity surfaces....     

Preparation of effervescent molded triturate tablets which are rapidly disintegratable and soluble or dispersible in hot or cold aqueous media, said tablets comprising a mixture including two separate, originally pulverulent materials, which are capable of reacting in the presence of water to produce...     

A method for producing a non-woven fabric which comprises bonding webs comprising a hydrophilic or hydrophobic non-shrinkable fiber and a heat-shrinkable fiber (e.g., a dry heat-shrinkable fiber and a wet heat-shrinkable fiber) partially or in a pattern with a binder, heating rapidly the bonded webs...     

A method for making multi-layer aspirin tablets including a timed-release layer by coating particles of standard aspirin prior to tabletting with an organic solvent solution containing cellulose acetate phthalate and a plasticizer and pressing together separate layers of the thus-coated aspirin and standard...     

A group of dielectric compounds and mixtures of dielectric compounds with useful properties at microwave frequencies is disclosed. The dielectric materials are temperature compensated, have relatively high dielectric constants, and comprise the group of BaTi.sub.4 O.sub.9, and mixtures of Li.sub.2 TiO.sub.3...     

A chipboard structure is disclosed which is made substantially of 100% sawdust waste material. The chipboard has a core portion which contains the coarsest particles of the sawdust, the surface portions of the chipboard containing the finest fraction of the sawdust, intervening portions of the chipboard...     

This invention proposes a method for eliminating "sink" in molded glass fiber reinforced panels for automotive and other uses. Such panels are normally formed with integrally molded reinforcement shapes (ribs) and fastening locations (bosses), and a slight depression or "sink" occurs in the exposed panel...     

An electrical resistor is manufactured by molding a mixture of the powders of tetrafluoropolyethylene, carbon and metal and then sintering the molded body. Terminals comprising a mixture of a powder of tetrafluoropolyethylene and a powder of soft metal are provided by simultaneously molding a lamination...     

A process for recovering mixed plastic material including polyethylene and polyvinyl chloride wherein the material is ground, ballistically sorted and recovered while employing a regenerating master mix including rongalite and chlorinated polyethylene.

Erosion of soil is inhibited by forming a wind and rain resistant mat thereon by the method whereby a water soluble cellulose ether is dispersed in a latex containing at least 2.0 percent solids of an interpolymer of an alkenyl aromatic monomer, a conjugated diolefin and an unsaturated carboxylic acid...     

A solid, slate-like product, a composition and method of producing the same comprising a substantially uniform mixture of at least five parts by weight of a finely divided taconite iron ore material containing at least about 1 percent magnetite therein and an amine-formaldehyde resin such as urea-formaldehyde...     

Boron nitride-boron nitride composite bodies may be produced by combining pure boron nitride fibers with partially nitrided fibers consisting essentially of B, N, O, and H, and hot pressing the composite at elevated temperatures and pressure. The partially nitrided material serves as a source of matrix...     

Cellulosic boards, such as hardboards, fiberboards and particle-boards, are flame retarded by incorporation of a synergistically acting alumina trihydrate-ulexite composition in the boards. The alumina trihydrate-ulexite flame-retarding agent provides a board of satisfactory strength properties with...     

Air-laid fibrous webs are formed from randomly-oriented mixed fibers containing a minor proportion of short, flock-length, thermoplastic and thermoretractile fibers. The air-laid web is then heated, without pressure, to cause melting of the thermoplastic fibers to the point of substantially complete...     

A dense silicon carbide having improved properties is disclosed which is prepared by the addition of a carbonaceous additive to a boron doped silicon carbide and hot pressing the mixture at a sufficient temperature and pressure whereby a dense substantially nonporous ceramic is formed.

An improvement is provided in moulding processes for composite bodies or sheets, especially chipboard, made from mouldable compositions in which an isocyanate-based binding agent is used, the improvement being the provision of a metallic soap at the interface of the composition and mould surface to assist...     

Molding compounds in various forms for molding into high performance composites, are prepared from reinforcing mica platelets, preferably of high aspect ratio, and thermosetting unsaturated polyester resins. The unsaturated polyester solid and a solid vinylic monomer are blended, finely divided (e.g....     

Large void-free castings of polyethylene can be made by blending high density polyethylene pellets with low density polyethylene powder, followed by heating to above the melting point of the low density polyethylene and below, or only slightly above, the melting point of the high density polyethylene....     

The method of making a briquet from directly reduced finely divided metallized material is disclosed whereby 85 to 95% of metallized material is mixed with 5 to 15% of a binder to form a free flowing briquet feed, then densifying the feed material and forming it into briquets.

Finely ground polytetrafluoroethylene molding powder with or without a filler is subjected to high speed agitation in the presence of a medium consisting essentially of water and a hydrophobic organic liquid at a ratio of 0.5 to 1 liter per 1 Kg of the resin to agglomerate it. Hydrophobic organic liquids...     

The present invention relates to non-woven fabrics characterized by excellent drapeability, very pleasant handle and good tensile properties. The fabrics are made from melt blends of a polyamide together with lactam-polyol-polyacyl lactam or acyl-polylactam terpolymers. The production of the non-woven...     

Melt blended fibers of lactam-polyol-polyacyl lactam or acyl polylactam terpolymers together with polyesters are thermally bonded at temperatures below the bonding temperatures of either the crystalline polyester or the terpolymer, resulting in thermally stable fabrics that have bond strength greater...     

Mineral ore pellets substantially devoid of water are disclosed which contain particles of mineral ore and an alkali metal carbonate. A method for making such pellets is also disclosed which includes mixing particulate mineral ore with an alkali metal carbonate and water to form a plastic mass, forming...     

A lightweight aggregate comprising a sand and cement accreted onto a nucleus particle of expanded polystyrene which is coated with molasses to aid accretion and a clay accreted onto a nucleus particle of combustible vegetable material. The sand and cement may include powdered and granular expanded polystyrene...     

An article, such as a pallet having a substantially flat deck member and a plurality of hollow legs projecting from the deck member, is molded as a one-piece unit from a papermill sludge. Dried, comminuted papermill sludge is blended with a fibrous reinforcing material, preferably a cellulosic material...     

Remoldable panels are produced by continuously plastifying and extruding an at least partially aggregated particulate mixture comprising about 40 to about 60% by weight of thermoplastic resin, preferably polypropylene, and about 60 to about 40% by weight of a particulate organic and preferably cellulosic...     

A non-water dispersible water-softening bead is disclosed having from 80 to 90% sodium alumino silicate and from 10 to 20% low density polyethylene. The bead has a diameter of between 200 and 1000 microns and a calcium capacity of at least 200 mg calcium carbonate/g. The sodium alumino silicate has a...     

Wood can be hot-pressed into various composites using as adhesive subdivided plant foliage. Considerable bond strength is achieved, the bonds having water resistance adequate for many uses. The foliage is the primary adhesive i.e., is greater than 95% wt. of the active adhesive components present. The...     

A method of encapsulating electrical apparatus in a particulate filler material which is cohesively bonded together by a binder material which forms beads around the points of contact between contiguous particles. The filler material includes uncoated and dry, resin-coated particles, with the dry resin...     

The instant invention is directed to a novel process for the production of bonded foam, and particularly polyurethane foam scrap. The process allows for the production of a high quality rebonded product. Significant improvements are seen in the quality of the product, reduction in density, reduction...     

Phenol-aldehyde resins are prepared by condensing phenol with formaldehyde and isobutyraldehyde in the presence of an alkali. The resulting resins are particularly suited for manufacturing products such as fiberboard and chipboard.

A molding process for forming a three-dimensional article in layers. In one embodiment, a matrix comprising a planar grid-like member having a plurality of openings formed therethrough is employed. In an initial layer, casting material and mold material are deposited in selected openings to form a portion...     

A method of compacting powder comprising interweldable particles into a solid body by using a shock wave. The shock wave has such an amplitude that interwelding of the particles in the powder is obtained. The shock wave is generated by impact of either a body impacted against the powder or by a capsule...     

A versatile process and apparatus is presented for producing, in high yields, many different grades of pulp from a single wood specie or for pulping any specie or type of woody material, and for storage and recycling of the by-product liquid and gaseous materials. The process of this invention is virtually...     

A direct compression process for forming an effervescent tablet containing an active chemical compound is enhanced by the addition to the composition to be compressed of an alkali metal carbonate.

The present invention relates to a vermicular expanded graphite composite material and to an improved method for preparing such material by blending vermicular expanded graphite with a corrosion resistant resin dispersed in a carrier, vaporizing the carrier, and heating the composite material to sinter...     

An improved process for molding fiber-reinforced articles and in particular, those articles which are formed from monofilaments such as metal fibers and processed mineral fibers of the slag type. The fiber-containing molding composition is enclosed in a restraining means, such as a bag, and placed in...     

A sintered ceramic body of high toughness, consisting of an isotropic ceramic matrix (e.g. Al.sub.2 O.sub.3) and at least one therein-dispersed phase (ZrO.sub.2, HzO.sub.2) of ceramic embedment material formed from a powder consisting of particles having an average diameter from 0.3 to 1.25 .mu.m, wherein...     

An especially high strength, high temperature, economical material useful for insulation is preferably made by making up a mix having the following proportions in parts by weight: 20-50 parts expanded perlite; 0.5-4 parts sodium fluosilicate; 0.2-5 parts fiber material; a water solution having 9.5-19...     

A composite foamed material and a process for the production thereof are disclosed herein, the process comprising premixing expandable or expanded polystyrene beads, a binder and fragments of resilient, open-celled neoprene. The materials are combined in the proportions of about 4-15% polystyrene beads,...     

An incombustible material containing at least one mineral substance, and including a first ingredient composed of a plurality of pieces constituted by fibers of cellulose and/or chips of wood shavings, with the pieces forming a network, a mass of thermosetting synthetic resin gluing the pieces of the...     

Process for the manufacture of fibrous products by drawing at elevated temperature a sheet comprising sintered particles of a synthetic organic thermoplastic polymer, which sheet also contains 0.1 to 5 phr of a processing aid, being certain fatty acids or compounds thereof.

An agglomeration process in which clay fines alone or in combination with other materials are agglomerated to a usable pellet size for a variety of marketable end products. The clay fines are collected, prepared and blended with conditioners and/or other waste materials in the proportions necessary to...     

A hopper-feeder (10) especially suited for, but not limited to, continuously feeding self adhering powders to a subsequent processing step is disclosed. In particular, the apparatus includes a first hopper (12), an intermediate passageway (16), a second hopper (18) and a feed guide (20). A wiper (32),...     

The invention relates to a process for the production of urea/formaldehyde adhesives and to the adhesives thus obtained. According to the invention, an inorganic salt is mixed with a source of formaldehyde, the resulting mixture is heated and reacted with urea to initiate polymerization in an acid medium,...     

A scrap-free, substantially solid phase, relatively low temperature economical process for rapidly making plastic articles from resinous powders wherein the resultant articles can comprise various polymers including oriented polymers; polymers with a high practical heat distortion temperature; expanded...     

The disclosure is of a high performance speaker diaphragm which comprises needled and interlocked textile staple fibers of a first, relatively heat-resistant fiber and a second, heat-softenable fiber. The fibers are molded together to soften the second fiber whereby it interlocks with the first fiber.

A radome and the method of manufacture thereof are presented wherein the radome is constructed from a series of rings of fiber reinforced polytetraflouroethylene. The rings are machined from a cold molded PTFE-fiber composite billet and then loaded into a mold cavity. The rings are then subjected to...     

Particle board contains, as a fibrous material with good structural properties, at least a proportion of chicory root particles. Preferably the chicory is mixed with bagasse fibres to provide strength to the board, and a filler in the form of coffee grounds is included. The coffee and chicory constituents...     

A method of forming structural board panels from short strands of bagasse or other cellulistic material. The material resinated, compressed and cured to give an open structural block. A mortar screed of portland cement and sand is then applied to penetrate interstices between the strands and is built...     

The strength of phosphate shale agglomerates or briquettes is enhanced by adding to and mixing with crushed phosphate shale ore tempering water and a water-soluble alkali metal or ammonium phosphate. The water-soluble phosphate salt is preferably dissolved in the tempering water and the solution sprayed...     

Composite panels are disclosed which comprise outer layers derived from cellulosic and like material conventionally employed in particle boards and an inner layer which is comminuted scrap plastic material, the various layers and the particles in them being bonded together using an organic polyisocyanate...     

A mat-forming apparatus, especially for the production of particle board, comprises a conveyor grate disposed above a layer-carrying surface, e.g. a conveyor, and below a feeder for scattering the particles onto the surface through the travelling grate. According to the invention, the lower pass of the...     

A process for producing a metallic article comprising forming a mixture of metallic particles and plastics particles, injecting the mixture under pressure and at elevated temperature into a die, allowing the die to cool and removing from the die the metallic article.

A method and particle board composition which employs urea formaldehyde resin adhesive, but which is formaldehyde suppressed by adding to the formaldehyde resin, a small but suppression effective amount of a weak acid and calcium metal silicate.

A fiber board composition and a fiber board composite formed therefrom is capable of consolidation into a variety of structural building products ranging from flat sheets and panels which may interlock for modular housing to 2.times.4's through 2.times.12's, etc. Fiber boards comprised of the fiber board...     

This disclosure is directed to a friction material which includes a porous material and capsules containing a hydrophobic substance in a liquid form. The porous material and capsules are formed into a composite structure by a binding agent so as to use the hydrophobic substance contained in the capsules...     

In a method of making molded articles, such as particleboard from mixtures of wood chips or like particles, bonding agents and reaction accelerators, initially the particles are divided into two portions A and B. Portion A is wetted with bonding agents and portion B is wetted with reaction accelerators....     

A halogenated hydantoin product and method of producing same for use as e.g. a bleaching agent or disinfectant comprising a halogenated hydantoin of the formula ##STR1## wherein R is methyl or ethyl and X.sub.1 and X.sub.2 which may be the same or different is chlorine or bromine, either as the sole...     

A neutron-absorber body for use in burnable poison rods in a nuclear reactor. The body is composed of a matrix of Al.sub.2 O.sub.3 containing B.sub.4 C, the neutron absorber. Areas of high density polycrystalline Al.sub.2 O.sub.3 particles are predominantly encircled by pores in some of which there are...     

Disclosed in accordance with the invention is a method for fiberboard manufacture comprising the steps of steaming and grinding woodchips to obtain a wood pulp, using said wood pulp to prepare a slurry of wood pulp in water, mixing said slurry with a binder, a cure catalyst for the binder, a water-repellent...     

This invention relates to a process and an apparatus for producing tablets of good quality with minimal waste by compressing granulated matter at a regulated temperature. An important advantage of the invention is that it permits direct tabletting of active ingredients without the need to include additives...     

An improved method is provided for producing mechanically alloyed powders on a commercial scale comprising milling the components of the powder product in a gravity-dependent-type ball mill to produce a powder having a characteristic apparent density. Powder so produced will have reached an acceptable...     

A mixture of alumino-silicate glass, alumina and filler is hot pressed to produce a mullite composite.

In a process wherein parts are pressed into a predetermined shape by filling a die cavity with a powder material, compressing the powder under pressure to form a compressed part of said shape, an improvement to that process comprises subjecting a portion of the cavity to vibrations during the filling...     

A granular bleaching activator for use in a detergent or bleach, which has particles which have a size of from 0.5 to 3 mm and are composed of (a) from 70 to 99.5% by weight of one or more bleaching activators for per-compounds and (b) from 0.5 to 30% by weight of one or more water-swellable assistants...     

Dewatering of sludge is accomplished by adding an organic fibrous material having the bulk specific gravity increased by being pressed or being wetted with water and a high molecular weight flocculant to the sludge, adjusting the resulting flocs to a diameter of not more than 1 mm, and subjecting the...     

Hydronium bonded polycrystalline shaped articles may be produced by the simple expedient of selecting a hydronium containing powder prepared by one of a plurality of prior art methods and then intermingling the hydronium powder with ortho-phosphoric acid to obtain a viscous mixture (resembling the consistency...     

A composite is produced by shaping a ceramic filler into a porous compact and infiltrating the compact with liquid alkaline earth silicate or alkaline earth aluminosilicate.

A castable mix formulation for casting ceramic articles which comprises ceramic particles and an organic resin binder composed of furfuryl alcohol and a catalyst consisting essentially of zinc chloride and para toluene sulfonic acid.

A foam-fiber composite, useful as an absorbent for sanitary napkins is disclosed. It is a resilient, absorbent structure made from large particles of an amino-ether hydrophilic foam (and optionally a superabsorbent and wood pulp), which by use of a carding machine is uniformly distributed in, and heat...     

A molded composite material comprising a plural number of constituents is provided in which at least two of the constituents are distributed with a relative existing ratio varying at least in one direction in the composite material. A process for producing the composite material is also provided.

Procedure for the manufacture of briquettes or pills for stoking made of stems from grain or straw or similar cellulosic waste material with the admixture of a binding agent. Compressing, principally by trace or piston pressing, at a pressure temporarily raising the temperature in the straw briquette...     

Annular pellets of burnable poison specifically boron carbide, B.sub.4 C, in a matrix of a refractory material, specifically aluminum oxide, Al.sub.2 O.sub.3, are produced. The pellets are of small wall thickness. Powders of the Al.sub.2 O.sub.3 and the B.sub.4 C are milled in a ball mill in water in...     

Fiberboard shims are manufactured which contain blocked isocyanates. The blocked isocyanates are blended with the other shim components to ensure complete distribution of the isocyanate into the shim, thereby improving the strength characteristics of the shim while simultaneously simplifying the manufacturing...     

A method for making a porous structure including forming a plurality of particles into a desired shape, the particles being in a size range from about 40 to about 400 microns and including from about 5 to about 100 percent by weight of microporous particles of a synthetic thermoplastic polymeric material...     

Method for manufacturing a molded article, for use, for example as a fluid filter or as a preform for a structural composite, is prepared from a batt of nonwoven structural fibers and a binder material, such as binder fibers or a thermoresponsive resin. The batt is stabilized by exposing it to a temperature...     

A process for making compacted particulate polyolefin compositions is described. The process includes the steps of: (a) thoroughly mixing a molten blend of a polyolefin and a modifying agent; (b) cooling the blend to a temperature below the melting temperature of the polyolefin, while masticating the...     

A method of making a borate treated wood particle board by applying an adhesive resin and a particulate borate treating agent (anhydrous borax or zinc borate) in a dry form to the wood particles to produce treated wood particles (wafers). The treated wood particles are formed into a mat and consolidated...     

A process for producing a moldable ceramic mass which comprises preparing a suspension of ceramic material in a liquid vehicle, said ceramic material being comprised of a mixture of fibers and particulates of a ceramic selected from the group consisting of aluminum oxide, beryllium oxide, silicon carbide,...     

The invention relates to an improved hydrophobic cathode for use in a zinc-air cell, and to a method for making said cathode. The cathode comprises an admixture of discrete particles of gamma manganese dioxide and carbon and a polymeric halogenated hydrocarbon. The method includes the step of intensively...     

A process for molding plastic parts includes the steps of providing two or more colors of pigmented powder particles of thermoplastic material; casting the particles against a heated surface to form non-patterned layers of particles with voids therebetween; heating the layers to form color blended fused...     

A fusion bonded fiber product is made by compressing between heated dies a mat of moisture-containing fibers of the type that change irreversibly to an amorphous nonglossy state that permits fiber-to-fiber bonding at a characteristic critical temperature. The further compression of the partially compacted...     

Pharmaceutical mixtures are prepared by continuous metering of the components and shaping by a conventional method.

A continuous process for the production of gypsum board of variable yet predictable density, wherein a fibrous from of stucco produced from gypsum crystals or fibers is combined with standard calcined gypsum and formed into the board. The density of the resultant board varies inversely with the content...     

In the process for making gypsum fiberboard the boards are formed or molded rom a mash containing calcium sulfate dihydrate and fiberous material. By heating and subsequently cooling the boards the dihydrate is first converted into the hemihydrate and subsequently recrystallized again to the dihydrate....     

An air permeable sheet-like structure comprising 5% to 50% by weight of reinforcing fibres, and between about 5 and about 50 millimeters long, and from 50% to 95% by weight of wholly or substantially unconsolidated particulate non-cross-linked elastomeric material, and in which the fibrous and elastomeric...     

A hot-pressed ceramic composite having good resistance to thermal shock and good erosion/corrosion resistance in molten alloys, and a method for producing said composite which comprises the blending of fused zirconia mullite with boron nitride.

A process for producing a workpiece by compacting powder material, includes the steps of applying compression to the material along selected preferably orthogonal axes in compression steps, each compression step causing a volume reduction selected to produce the desired final compaction and orientation...     

Novel ceramic-metal intercalation compounds useful in the formation of densified ceramic-metal articles are prepared, for instance, by exposing a ceramic to an organometallic compound in a low dielectric solvent. The use of the ceramic-metal compounds in the formation of articles by densification allows...     

A ceramic composite is produced wherein the matrix is comprised of silicon nitride and cordierite and the reinforcing phase is comprised of Si-C-containing fibers.

Discontinuous fibers are entrained in a gaseous medium and coated while entrained with a substantially continuous coating of a binder material. Plural coatings of various binder materials may be applied to the entrained fibers. Also, one or more solid particulate materials may be adhered to the fibers...     

A method for making a composite material including a discontinuous phase of cellulosic fiber encapsulated in and bonded to a continuous phase of a polymeric component containing a major portion of polyethylene by mixing the cellulosic fiber and polymeric component while raising the temperature of the...     

A fusion bonded fiber product is made by compressing between heated dies a mat of moisture-containing fibers of the type that change irreversibly to an amorphous nonglassy state that permits fiber-to-fiber bonding at a characteristic critical temperature. The further compression of the partially compacted...     

In the manufacture of lightweight structural profile including a resin-bonded core of closely compacted particulate filler, loose filler is packed into a shaping die by means of applied vacuum. The filler is packing within a sheath of glass rovings which is used to draw the packed filler through the...