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5626960 |
Spandex containing a huntite and hydromagnesite additive
Spandex having dispersed within it particles of a mineral mixture of huntite and hydromagnesite has decreased tackiness, increased resistance to chlorine-induced degradation, satisfactory process...
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5616676 |
Thermosetting polyurethane-urea elastic yarn and process thereof
A thermosetting polyurethane-urea elastic yarn having a thermosetting ratio of 45-65%, which is obtained by reacting a polyglycol which has a number average molecular weight of 600-6,000 and which...
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5607636 |
Process of making plexifilamentary fiber
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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5603885 |
Process for the preparation of nonwoven fibrous sheets
A process for the preparation of plexifilament strands of polyethylene having a ultraviolet stabilizer, in which the polyethylene is dissolved in a non-chlorofluorocarbon solvent, which is pentane,...
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5588205 |
Method of manufacturing a high density integrated circuit module having complex electrical interconnect rails
The present invention includes a high density integrated circuit module which includes a plurality of stacked, individual integrated circuit devices wherein serpentine electrical interconnect rails...
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5582786 |
Method of producing fibre or film
A water-absorbent water-insoluble fibre or film is produced by extruding an aqueous solution of a water-soluble polymer into a gaseous medium to form fibre or film. The extruded fibre or film is...
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5547626 |
LBT process of making high-tenacity polyethylene fiber
There is disclosed a high-tenacity polyethylene fiber containing an ethylene component as a main repeating unit, the fiber exhibiting an intrinsic viscosity [η B ] of at least 7 and having a...
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5547624 |
Process of 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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5510072 |
Process for the manufacture of elastic articles from poly(monovinylaromatic/conjugated diene) block copolymers and elastic articles obtainable therewith
A process for the manufacturing of elastic articles such as fibers, yarns, or films, from substantially pure selectively hydrogenated block copolymers, comprising at least two blocks predominantly...
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5466410 |
Process of making multiple mono-component fiber
An apparatus for extruding a wide variety of plural-component and mixed monocomponent fiber configurations in a spin pack which utilizes one or more disposable distributor plates in which...
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5445785 |
Method of preparing a nonwoven web of poly(vinyl alcohol) fibers
A method of preparing a nonwoven web of poly(vinyl alcohol) fibers which involves the steps of (1) preparing an aqueous polymer solution of a defined poly(vinyl alcohol); (2) extruding the...
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5442003 |
Para-aramid dope of low degree of polymerization, para-aramid fiber and para-aramid pulp produced therefrom and processes for producing the same
A para-aramide dope of low degree of polymerization exhibiting an optical anisotropy containing 4-10% by weight of a para-aramide having an inherent viscosity of 1.0-2.5 dl/g and 2-10% by weight of...
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5438089 |
Process for the manufacture of polymeric objects starting from a solution
Process for the manufacture of a polymeric object starting from a solution of a polymer in a solvent and comprising drawing a solvent-containing polymeric object, the solvent containing a first and...
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5436074 |
Polypropylene highly spread plexifilamentary fiber
A polypropylene three-dimensional plexifilamentary fiber having a microwave birefringence of 0.07 or more and an Mw/Mn of 4.3 or less. Although a spreading agent is not included in this fiber, the...
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5415818 |
Flash spinning process for forming strong discontinuous fibres
The process of this invention for making strong, discontinuous fibers from a polyolefin includes feeding a solution of polyolefin dissolved in an organic solvent at a pressure that is at least...
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5413747 |
Water absorbent fibres
Fibres and filaments of water-absorbent water-insoluble fibrous material have a matrix of a crosslinked copolymer formed from 50 to 95% by weight of ethylenically unsaturated carboxylic monomer and...
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5407619 |
Process for preparing a fiber precursor of metal compound, and a process for preparing a fiber of metal
A spinning nozzle for dry spinning a spinning solution containing a metal compound and an organic polymer compound by a blowing method. In the spinning nozzle, an air nozzle 6 is provided having a...
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5389431 |
Nonwoven fabric and process for producing same
There are disclosed a nonwoven fabric comprising fibrillated three-dimensional network fibers prepared by the use of a styrenic polymer having a high degree of syndiotactic configuration as the...
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5387387 |
Method and apparatus for dry spinning spandex
A method utilizes a hot inert gas flow in an elongated upright heated tube (A) driving off the solvent carrying polymer forming filaments by arranging spinnerettes (B) each forming a bundle of...
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5385702 |
Method for stable rapid spinning of a polybenzoxazole or polybenzothiazole fiber
Polybenzoxazole or polybenzothiazole polymer dopes are spun through a spinneret having an orifice density of more than 0.25 per cm 2 to form filaments. The filaments formed then pass through an...
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5384390 |
Flame-retardant, high temperature resistant polyimide fibers and process for producing the same
There are disclosed flame-retardant, high temperature resistant polyimide fibers of the general formula ##STR1## wherein n is an integer larger than 1, A is a tetravalent aromatic group and R is at...
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5367046 |
Low dielectric polyimide fibers
A high temperature resistant fiber, especially a polyimide fiber, having a dielectric constant less than 3 is prepared by first reacting 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane with...
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5362432 |
Process for dry spinning spandex
A process is provided for dry spinning a segmented polyurethaneurea at speeds as high as 900 meters/min. The process includes chain-extending an isocyanate-capped polyether glycol with a mixture of...
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5356584 |
Polybenzazole fibers with ultra-high physical properties and method for making them
A process for making PBZ fibers of ultra-high physical properties is given. Polybenzoxazole fibers made by the process of this invention have tensile strengths nearly double in value from what has...
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5340523 |
Improved method of incrementally drawing fibers
A fiber drawing process and apparatus in which the fibers are drawn in small increments by passing the fibers in multiple wraps over on rotatably mounted spaced apart spindles having discrete...
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5340519 |
Preparation of poly(m-phenylene isophthalamide) filaments
In the preparation of poly(m-phenylene isophthalamide) filaments, hydrogen chloride is removed from as-produced amide solution of poly(m-phenylene isophthalamide) by contact with basic ion exchange...
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5308598 |
Plexifilamentary fibers from pitch
A process is provided for flash-spinning plexifilamentary fiber from pitch. The fibers can be stabilized and graphitized. The flash-spinning requires polyethylene amounting to 0.3 to 3.5% of the...
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5296172 |
Electrostatic field enhancing process and apparatus for improved web pinning
Process and apparatus for improving web pinning and uniformity in a fibrous web forming operation. The improvements are achieved by imposing an auxiliary electrostatic field above the fibrous web...
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5296185 |
Method for spinning a polybenzazole fiber
Polybenzazole polymer dopes are spun into fibers at high speed by passing through a spinneret with proper selection of hole geometry, followed by spin-drawing to a spin-draw ratio of at least 20,...
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5294390 |
Method for rapid spinning of a polybenzazole fiber
Polybenzazole polymer dopes are spun through a spinneret having more than 2 per cm 2 , of orifices in relatively close proximity. The dope filaments formed, then pass through an air gap which has a...
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5286422 |
Process for producing three-dimensional fiber using a halogen group solvent
A halogen group solvent comprising a mixed solvent consisting essentially of bromochloromethane and/or 1,2-dichloroethylene and a co-solvent, wherein the co-solvent is at least one member selected...
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5286420 |
Production of light polarizing films
A process for the production of light-polarizing films containing polyvinyl alcohol, dichroic dye-producing components, optionally other dye-producing components, optionally additives, and...
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5286435 |
Process for forming high strength, high modulus polymer fibers
Fibers of linear polyethylene or polypropylene are solution spun, cooled, dried in hot air and hot drawn. Drying and hot drawing are carried out by passing a moving filament of the wet polymer...
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5264173 |
Polyvinyl alcohol monofilament yarns and process for producing the same
A process for producing a high strength and high initial modulus polyvinyl alcohol monofilament yarn. The monofilament yarn is polyvinyl alcohol having a polymerization degree of from 1500 to 7000,...
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5250237 |
Alcohol-based spin liquids for flash-spinning polymeric plexifilaments
A process is provided for flash-spinning plexifilamentary film-fibril strands of a fiber-forming polyolefin from a C 1 -4 alcohol or a C 1 -4 alcohol/co-solvent spin liquid that, if released to the...
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5248471 |
Process for forming fibers
This invention relates to a process in which a fiber is formed by spinning a melt or solution of a polymer through a capillary spinneret having a length/diameter (L/D) ratio equal to or greater...
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5246647 |
Process of making microporous hollow fiber or film membrane of poly(phenylene sulfide) (PPS)
The present invention relates to a process for preparing a microporous permselective membrane from a poly(phenylene sulfide) (PPS) polymer, an organic compound which substantially solubilizes the...
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5238634 |
Disentangled chain telechelic polymers
The present invention provides a process for producing high elongation elastomers and highly oriented films and fibers from polymers having specific associative groups, such that the end groups on...
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5209883 |
Fabrication of fluoropolymer hollow fibers for asymmetric membranes
Asymmetric hollow fibers comprising a fluoropolymer, and a process for making such fibers. The hollow fibers are useful for making fluid separation membranes, especially gas separation membranes....
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5204038 |
Process for forming polymers
Oriented conjugated polymer shaped articles can be formed by the process of (a) providing a carrier solution made up of (i) carrier solvent, (ii) nonconjugated flexible chain carrier polymer,...
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5192468 |
Process for flash spinning fiber-forming polymers
The invention relates to a process for flash-spinning plexifilamentary film-fibril strands of polymers that are substantially plasticizable in carbon dioxide and/or water and have a melting point...
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5183614 |
Method for producing X-ray detectable spandex fibers
An X-ray detectable spandex fiber and a method for producing it from a segmented polyurethane polymer comprising finely divided X-ray detectable material such as barium sulfate.
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5178802 |
Surface treatment of polyolefin objects
The adhesion of polyolefin objects, in particular highly oriented polyethylene filaments, to, for instance, polar matrices is improved by oxidizing the surface of the objects and then treating it...
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5176862 |
Process for the manufacture of stretched rope
The stiffness and the tensile strength of a rope containing polymeric filaments manufactured according to the gel spinning process are substantially increased by stretching it. The stretching is...
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5167881 |
Preparation of substantially polycrystalline silicon carbide fibers from polyorganosiloxanes
A process for the preparation of substantially polycrystalline silicon carbide fibers are provided. The fibers may be fabricated to have a small diameter and are thermally stable at high...
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5147586 |
Flash-spinning polymeric plexifilaments
An improved process is provided for flash-spinning plexifilamentary film-fibril strands of a fiber-forming polyolefin from a C 4 -7 hydrocarbon/co-solvent spin liquid that, if released to the...
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5133916 |
Polyvinyl alcohol fiber having excellent resistance to hot water and process for producing the same
Provided are a polyvinyl alcohol fiber having a specific higher order structure, obtained by having the orientation and arrangement of molecular chains forming the fiber which comprises a...
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5130408 |
Aromatic polyetherketone multifilament yarns
Filaments are produced from polymers having an inherent viscosity of at least 0.7 measured in concentrated sulfuric acid and containing in the polymer chain at least 50 percent of the repeating...
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5128415 |
Process for preparing polyethylene articles of high tensile strength and modulus and low creep and articles thus obtained
Polethylene articles having a high tensile strength above 2.0 GPa, a modulus above 70 GPa and a creep below 3×10 -7 sec -1 are obtained via thermoreversible gelation of a solution of...
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5123983 |
Gas management system for closely-spaced laydown jets
An improvement is disclosed for reducing or even preventing interferences or interactions between adjacent, closely-spaced laydown jets utilized in a fibrous sheet laydown process. The improvement...
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