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7582240 |
Rotary process for forming uniform material
A thin, uniform membrane comprising polymeric fibrils or a combination of fibrils and particles, wherein the fibrils have randomly convoluted cross-sections, and a process for making the membrane...
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7364792 |
Spun-dyed polyurethaneurea fibres, a process for their production and their use for producing fabrics
Described are elastic polyurethaneurea fibres comprising a cationically modified carbon black as an additive, so that the colour of the fibre is distinctly changed. Also described are a process for...
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7364678 |
Process for making and process for converting polyolefin fibres
The invention relates to a process for making a multi-filament polyethylene yarn via a gel-spinning process, Wherein a spin finish is applied at least once in an amount of 0.1-10 mass % based on...
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7288220 |
Solution spinning of UHMW Poly (alpha-olefin) with recovery and recycling of volatile spinning solvent
A process for spinning high molecular weight poly (alph-olefin) filament, particularly ultrahigh molecular weight polyethylene filament, from solution in a volatile spinning solvent with recovery...
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7179413 |
Flash-spinning process and solution
A process for the preparation of plexifilamentary film-fibril strands of synthetic fiber-forming polymer comprises the steps of generating a spin fluid and flash-spinning the spin fluid to form...
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7118698 |
Rotary process for forming uniform material
A process is provided for issuing material from a nozzle in a rotor rotating at a given rotational speed wherein the material is issued by way of a fluid jet. The material can be collected on a...
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6994538 |
Apparatus and method for molding optical lenses
An apparatus and a method for molding optical lenses are disclosed. The apparatus comprises a first molding shell with a first diameter, a sealing element surrounding the first molding shell, and...
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6830715 |
Method and device for producing elastane threads from recycling material
Method and device for producing elastane threads from spinning solutions using recycled elastane material.
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6811716 |
Polyolefin fibers and method for the production thereof
A method for producing hydrophobic polyolefin-containing fibers or filaments, in particular cardable staple fibers, using spin finishes applied after spinning and stretching, that comprise at least...
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6793840 |
Azeotrope mixtures with perfluorobutylethylene
An azeotropic mixture of perfluorobutylethylene and at least one of the group consisting of bromochloromethane, cyclopentane, cis-1,2 dichloroethylene, trans-1,2 dichloroethylene and...
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6787230 |
Ultrafine inorganic fiber, and a process of preparing for the same
The present invention relates to ultra-fine inorganic fibers and a method of producing the same. The method of producing ultra-fine inorganic fibers comprises the steps of: mixing sol or gel...
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6780361 |
Process of making polymer articles
A method including forming a pseudo-gel of a semi-crystalline polymer material and a solvent. The pseudo-gel is shaped into a first form and stretched. A portion of the solvent is removed to create...
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6723267 |
Process of making highly oriented polyolefin fiber
The invention relates to a highly oriented polyolefin fiber containing polyolefin with an intrinsic viscosity of at least 5 dl/g, which fiber has a tensile strength of at least 26 cN/dtex and a...
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6638470 |
Flash-spinning process and solution
A process for flash-spinning a web of plexifilamentary film-fibril strands of synthetic fiber-forming polymer and laying down the web to form a nonwoven batt material therefrom is provided. The...
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6533975 |
Process of making polyurethane fiber or film
This invention provides processes for preparing fiber or film comprising a polyurethane and layers delaminated from a lamellar clay, said layers being dispersed in said polyurethane. Fiber and film...
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6468652 |
Elastic polyurethane-urea fiber and method for producing the same
An improved polyurethane-urea elastic fiber is obtained by incorporating a specific urea compound prepared by reacting the following compounds together: (a) a nitrogen-containing compound having...
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6458304 |
Flash spinning process and solutions of polyester
A process for producing plexifilamentary or foam products by flash spinning in selected spin agents a polymer from the group consisting of poly (1,3-propylene terephthalate), poly (1,4-butylene...
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6436323 |
Production of fibre
Staple fiber is produced by extruding a solution of a polymer through a spinneret to form continuous filaments, gathering the continuous filaments to form a tow and continuously cutting the...
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6403712 |
Process for the manufacture of spandex and the spandex made thereby
Dry-spun polyurethane-based spandex ® containing 1-10 weight percent poly(vinylpyrrolidone) and a process of their preparation, are provided.
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6376071 |
Polyurethane fiber containing poly(vinylidene fluoride)
The present invention relates to polyurethane based fiber containing 0.1-25 percent poly(vinylidene fluoride) and a method of making the same.
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6316582 |
Use of an alkoxylated polyamine surfactant as a viscose spin bath additive
The present invention relates to a method of reducing the clogging of nozzles and slits and diminishing the formation of deposits in the spin bath system in the process of making viscose...
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6248273 |
Spinning cell and method for dry spinning spandex
A spinning cell for dry spinning spandex by extruding filaments from a nonuniform array of spinneret capillary groups in a rectangular bar and contacting them with a cross-flow of hot, inert gas is...
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6218460 |
Fibers flash-spun from fully halogenated polymers
A flash-spun material comprised of at least 90% by weight of polymers selected from the groups A, B, and C; wherein group A comprises polymers with a melting point above 280° C. that are comprised...
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6171537 |
Preparation of poly (urethaneurea) fibers
A process for the preparation of poly(urethaneurea) fibers by reacting a blocked aliphatic diamine with a capped glycol prepolymer, followed by extrusion spinning, is provided.
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6153136 |
Process for manufacturing cellulosic microfibers
Microfibers have been manufactured from dissolved cellulose, from which threads, yarns, and fabrics can be made. These cellulosic microfibers may be used to produce fabrics with the very soft feel...
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6153134 |
Flash spinning process
A spinning process using azeotropic compounds as spin agents having essentially zero ozone depletion potential and that are either non-flammable or of very low flammability.
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6136911 |
Fibers flash-spun from partially fluorinated polymers
A flash-spun material comprised of at least 20% partially fluorinated hydrocarbon polymers in which between 10% and 70% of the total number of hydrogen atoms in each hydrocarbon polymer are...
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6096252 |
Process of making polyurethane fiber
A process for preparing durable dry-spun, polyurethane fiber exhibiting a small angle X-ray scattering pattern that forms a layer line scattering image or an eyebrow-shaped four dot scattering...
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6034008 |
Flash-spun sheet material
This invention relates to improved sheets of flash-spun plexifilamentary film-fibrils useful in fluid microfiltration and sterile packaging. The sheet material suitable for use in microfiltration...
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6004672 |
Fibers flash-spun from blends of polyolefin polymers
This invention is directed to a flash spun plexifilamentary strand material comprising blends of thermoplastic material including polyethylene and polypropylene, the resulting strand has a unique...
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5922259 |
Cord of twisted polybenzazole fibers
There is provided a cord of twisted polybenzazole fibers, which has a tenacity of 35 g/d or higher and an elastic modulus of 800 g/d or higher. The cord has not only remarkably improved fatigue...
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5888434 |
Process for making a microporous membrane from a blend containing a poly (phenylene sulfide) polymer, an amorphous polymer, and optionally a solvent
The invention relates to a process for preparing a microporous membrane from an unsulfonated poly(phenylene sulfide) polymer by forming a mixture of an unsulfonated poly(phenylene sulfide) polymer,...
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5882566 |
Method for preparing a high strength, high modulus electrically conductive fiber
A method to make electrically conductative high strength and high modulus poly(p-phenylene terephthalamide) fibers rendered electrically conductive with sulfonic acid insitu ring-substituted...
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5879596 |
Low temperature process for making polyurethaneureas
A process for making polyurethaneureas using cryogenic mixing is provided. Such polyurethaneureas are useful for making spandex and, ultimately, various types of clothing. The process involves...
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5851936 |
Elongation for flash spun products
This invention relates to improved elongation properties for flash-spun plexifilamentary film-fibrils. The technique for obtaining the improved properties is to increase the length to diameter...
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5840828 |
Polyimide fibers
A polyimide fiber having textile physical property characteristics and the process of melt extruding same from a polyimide powder. Polyimide powder formed as the reaction product of the monomers...
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5840234 |
High-density polyethylene plexifilamentary fiber nonwoven fabric composed of fiber thereof, and manufacturing methods thereof
A three-dimensional plexifilamentary fiber (26) of a high-density polyethylene group obtained by supplying a polymer to a dissolving area in a state such that the polymer is melted by a heated...
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5833900 |
Process for modifying porosity in sheet made from flash spinning olefin polymer
This invention relates to a system and process for modifying the resulting properties of a flash spun plexifilamentary film-fibril web and spunbonded nonwoven sheets made from such webs. In...
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5820806 |
Process for the preparation of polyketone fibers
It has been found that fibres can be spun in a simple manner from polyketone polymer solutions by making a thermoreversible gel from a solution of polyketone and a solvent for the polymer having a...
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5811162 |
Sheet-like or tubular food casing based on cellulose hydrate
A food casing based on cellulose hydrate, which is preferably used as a sausage casing, in addition to cellulose hydrate, includes a copolymer having units of methyl vinyl ether and maleic acid...
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5788897 |
Electrically conductive fibers
High strength poly(p-phenylene terephthalamide) fibers are rendered electrically conductive with sulfonic acid ring-substituted polyaniline.
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5756031 |
Process for preparing polybenzazole filaments and fiber
A process for the preparation of polybenzazole filaments which comprises (a) extruding a solution of polybenzazole polymer in a mineral acid through a spinneret having at least 100 holes, which are...
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5744090 |
Process for the manufacture of conductive fibers usable in electrostatic cleaning devices
A method of making a conductive fiber in which the conductive fiber is formed from a mixture including at least one fiber forming material and conductive magnetic materials, and the conductive...
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5741451 |
Method of making a high molecular weight polyolefin article
By poststretching, at a temperature between about 135° and 160° C., a polyethylene fiber, which has already been oriented by drawing at a temperature within 5° C. of its melting point, an ultra...
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5731011 |
Apparatus for forming a fibrous sheet
An apparatus for adjusting the path that a web formed by striking a contoured surface baffle will take as it descends to a collection surface, in which the baffle is mounted on a pivot plate which...
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5723080 |
Process for producing splittable elastane yarns
An improved dry spinning process for manufacturing splittable elastane multifilament yarns wherein the coalescence of individual filaments is prevented, through the use of multihole spinning jets,...
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5707580 |
Flash-spinning process
An improved apparatus and process for flash-spinning plexifilamentary film-fibrils are provided in which a static mixing device is provided in the conduit through which the polymer and spin agent...
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5667814 |
Apparatus for making and collecting continuous fibers in the form of a rod-shaped batt
This invention relates to making backwindable rod shaped batts or logs from highly oriented flash-spun continuous fibers. The fibers are conducted from the exit of a spinneret through a tunnel and...
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5662852 |
Mass-colored formed structures based on aromatic polyamides, mass-colored fiber, and premix for producing mass-colored formed structures
A process for producing mass-colored fiber or film, comprises the steps of: a) preparing a premix by grinding a composition comprising a polar aprotic organic solvent, 5 to 30% by weight of an...
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5643524 |
Corona charging of flash spun plexifilamentary film-fibril webs in poor charging environments
This invention relates to flash spinning a plexifilamentary film-fibril strand and laying it down into sheet material including the step of subjecting the strand to an electrostatic charge. The...
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