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8003031 |
Method and apparatus for producing oriented slit film tapes
The invention relates to a method for producing oriented slit film tapes, comprising the following steps: extruding melt polymer through a die (2); simultaneous quenching and melt-drawing of the...
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7968028 |
Polymer gel-processing techniques and high modulus products
The present invention provides polymer gel-processing techniques and polymer articles of high modulus.
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7829002 |
Method for the production of plant cutting filaments
The invention relates to a method for the production of a cutting filament for a device used to cut vegetation such as a trimmer or border cutter. The filament is made of a synthetic material...
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7799258 |
Process for manufacturing a shaped part of ultra high molecular weight polyethylene
The invention relates to a process for the manufacture of a shaped part of ultra high molecular weight polyethylene (UHMW-PE) comprising melt processing, wherein UHMW-PE a) is annealed at a...
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7674409 |
Process for making uniform high strength yarns and fibrous sheets
Methods for preparation of high strength yarns having superior yarn-to-yarn uniformity of denier, tenacity and tensile modulus and uniform unidirectional fibrous sheets. Ballistic composites...
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7585445 |
Method for producing high tenacity polypropylene fibers
A method for producing high-tenacity polypropylene fibers with a tenacity greater than 6 cN/dtex and an elongation of less than 40%. To produce as much as possible fibers of a very fine denier, the...
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7575703 |
Polymer gel-processing techniques and high modulus products
The present invention provides polymer gel-processing techniques and polymer articles of high modulus.
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7501082 |
Oven for drawing fibres at elevated temperature
The invention relates to an oven for drawing fibers at elevated temperature, which oven is on two sides opposite one another provided with guide rolls dictating a zigzag up-and-down drawing...
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7273578 |
Method and apparatus for low-speed, high-throughput fiber drawing using coiled fiber loops
A method and apparatus for continuous drawing of fibers in the form of coiled fiber loops (e.g., polygonal or serpentine loops). The successive fiber loops are continuously laid on receiving ends...
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6994763 |
Elastomeric multicomponent fibers, nonwoven webs and nonwoven fabrics
A bonded web of multi-component strands that include a first polymeric component and a second polymeric component is capable of overcoming a number of problems associated with nonwoven webs...
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6982231 |
Elastomeric, breathable laminate with enhanced breathability upon extension
An elastomeric, breathable laminate having enhanced breathability is formed by bonding a breathable, microporous, extendible/elastic film to a nonwoven facing material. The facing material can be...
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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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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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6476172 |
Metallocene catalyzed propylene-α-olefin random copolymer melt spun fibers
A fiber product drawn from an isotactic propylene copolymer of a C2, C4, C5, C6, C7 or C8 α-olefin monomer produced in the presence of a metallocene catalyst characterized by a bridged chiral and ...
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6346325 |
Fiber-reinforced composite encased in a thermoplastic and method of making same
A fiber-reinforced depolymerizable and repolymerizable thermoplastic composite that is encased in a depolymerizable and repolymerizable thermoplastic resin exhibits the strength and stiffness that...
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6238605 |
Low-fibrillation moulded bodies
The invention relates to a process for the production of a low-fibrillation moulded body containing polytetrafluorethylene. The process is characterised in that a pre-moulded body of...
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6210622 |
Process of making polymeric fibers
A for the production of polymeric fibers in the form of a tow includes drawing and heat setting, with and without crimping, in which the tow has a constant denier per inch during the processing....
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6203743 |
Heat setting a tow of synthetic fibers using high pressure dewatering nip
An apparatus and method for heat setting a traveling tow of synthetic filaments utilizing a high pressure dewatering nip roll mechanism to remove moisture from the tow prior to heat setting. The...
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6136124 |
Process for producing a structured, voluminous nonwoven
A process for producing a structured, voluminous nonwowen comprises the following steps: (a) a spun nonwoven is produced from a plurality of individual filaments which are stretched and gathered...
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6129882 |
Apparatus for manufacturing multifilament threads
The invention relates to an apparatus for manufacturing multifilament threads with at least one hot-air module 6 for drawing or relaxing the thread Y. To manufacture multifilaments with...
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6117378 |
Process for producing cellulose fibres
A process for the production of cellulose fibers, comprising the following steps: (A) dissolving a cellulose-containing material in an aqueous, tertiary amine-oxide to obtain a spinnable cellulose...
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6090910 |
Degradable monofilament and preparation process thereof
A degradable copolymer filament comprising an internal structure having the following separate phases: (a) a matrix phase comprised as a primary component of a polymer segment which exhibits a...
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6054086 |
Process of making high-strength yarns
An ultra-high molecular weight polyolefin having a viscosity average molecular weight of at least 500,000 is subjected to melt forming into a film, the thus obtained molten film or solid state film...
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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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5836146 |
Method of and apparatus for producing thick regions in a filament yarn
The distribution of thick regions along a filament yarn can have a random character if the thick regions of a filament from a first stretching zone are heated in a second stretching zone and...
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5833787 |
Process for making a nonwoven web derived from lactic acid, web produced thereby, and apparatus therefor
The invention relates to a process for the manufacture of a nonwoven web using filaments of melted polymers, of the type including the steps of spinning the polymer or polymers, of cooling, drawing...
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5814569 |
Uniaxially elastic nonwoven fabric
A nonwoven fabric of superior uniaxial elasticity is provided. The nonwoven fabric comprises of conjugate filaments each of which is about concentric sheath-core type. Core component is composed of...
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5762840 |
Process for making microporous fibers with improved properties
A distinctive technique for making porous fiber includes a stretching of a substantially continuous fiber while the fiber is in an operative association with an effective quantity of surface-active...
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5749214 |
Braided or twisted line
Braided or twisted lines made from gel spun polyolefin yarns are stretched to increase line tenacity. If desired, stretching conditions can also be chosen to significantly reduce the denier of the...
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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 hi...
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5730821 |
Process for producing a web of thermoplastic polymer filaments
A process for producing a web fleece of thermoplastic polymer filaments. Filaments of thermoplastic polymer are spun from a spinneret to form a curtain passing through a cooling chamber and a...
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5714107 |
Perforated nonwoven fabrics
The invention provides a perforated nonwoven web fabricated from a bonded thermoplastic polymer web. The perforated nonwoven web contains a multitude of self-sustaining sustaining perforations that...
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5679300 |
Process of treating a tow of melt-spun filaments
A method for treating a tow of melt-spun filaments to produce a tow of uniformly crimped filaments having a high initial modulus by heat-setting and stuffer box crimping includes the steps of...
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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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5661880 |
Method and apparatus for producing a multifilament yarn by a spin-draw process
A method and apparatus for producing a multifilament yarn by a melt spinning-draw process, and which includes applying additional heat to the melt in the region of the spinneret. The relationship...
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5565158 |
Process for recycling multicomponent mixed polymer wastes
A process of recycling a multicomponent mixed polymer waste material involves the steps of agglomerating the multicomponent mixed polymer waste material and spinning the agglomerate to form yarn,...
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5505888 |
Process for preparation of cellulose acetate fibers useful in preparation of paper products
A process to prepare cellulose acetate fibers useful for preparation of paper products. This process includes (A) tensioning a running band of cellulose acetate filter tow, (B) contacting the...
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5487859 |
Process of making fine polyester hollow filaments
A post-coalescence melt-spinning process for preparing fine undrawn hollow polyester filaments having excellent mechanical quality and uniformity at high speeds (2-5 km/min) involving selection of...
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5468440 |
Process of making oriented film or structure
Applications of isotactic polypropylene resin compositions produced from metallocene catalyst wherein the resins yield articles with comparable shear modulus and heat distortion temperature values...
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5454525 |
Process for producing a ready-to-use racquet string, especially for tennis racquets
A method for conditioning a racquet string which is tensioned to an elongation between 5 and 15% and in this state is wound on a spool. To implement this process, an untreated string segment is...
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5439626 |
Process for making hollow nylon filaments
A melt spinning process and the nylon hollow filaments and yarns made by such process which includes extruding molten nylon polymer having a relative viscosity (RV) of at least about 50 and a...
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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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5435955 |
Process of producing porous polypropylene hollow fiber and film
A process of producing a porous polypropylene hollow fiber or film which comprises a step for forming a large number of micropores in the surrounding wall of said fiber or in said film by drawing a...
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5419022 |
Apparatus for spin-drawing thermoplastic filament yarns
In an apparatus for the spin-drawing, on multiple ends, of thermoplastic filament yarns on at least two pairs of godets (1, 2 and 1', 2'), their axes of rotation (7 and 8) are arranged skew with...
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5401447 |
Process for producing celluose moldings
A method for producing a cellulose shaped article characterized by causing cellulose dope substantially composed of an alkali soluble cellulose and an aqueous alkali solution having an alkali...
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5397527 |
High modulus polyester yarn for tire cords and composites
Yarns are prepared by spinning PEN or other semi-crystalline polyester polymers made from similarly rigid monomer combinations to a state of optimum amorphous orientation and crystallinity. This is...
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5372756 |
Method of forming striated light diffuser
A light transmitting body (10), (40) has a longitudinal axis (12), (42), and a light radiating surface (14), (46) extending substantially parallel to the axis (12), (42). Where the body is an...
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5362433 |
Process of making polyurethane elastomer thread
In a process for producing melt-spun elastomer threads with a high modulus, a breaking elongation of 80 to 300% and a boiling shrinkage of at least 20%, multifilament elastic threads are obtained...
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5356582 |
Continuous hollow filament, yarns, and tows
Hollow polyester undrawn filaments having excellent mechanical quality and uniformity are prepared by a simplified post-coalescence melt spinning process at speeds of e.g. 2-5 km/min by selection...
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5349729 |
Method to control drawing of a plurality of synthetic yarns
Method and apparatus to selectively treat adjacent yarns in draw machine to provide different characteristics in the synthetic yarn being drawn and beamed. The yarn running between the feed rolls...
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