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7473751 |
Biaxially-oriented metallocene-based polypropylene films having reduced thickness
A polymer film having a thickness of 10 microns or less and improved barrier characteristics to both water vapor and oxygen is formed from a biaxially-oriented polypropylene film of isotactic...
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7455674 |
High strength bioresorbables containing poly-glycolic acid
Polymer compositions comprising poly-glycolic acid (PGA) or a functional derivative thereof with a tensile strength of at least 1200 MPa are disclosed. Processes suitable for manufacturing said...
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7449532 |
Cycloolefin copolymer obtained by ring-opening polymerization, use thereof, and process for producing retardation plate comprising the copolymer
A cycloolefin copolymer obtained by ring opening polymerization according to the present invention is characterized by comprising a specific structural unit and exhibiting a single peak in a...
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7351243 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
High strength bioresorbables containing poly-glycolic acid
Polymer compositions comprising poly-glycolic acid (PGA) or a functional derivative thereof with a tensile strength of at least 1200 MPa are disclosed. Processes suitable for manufacturing said...
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6992128 |
Highly active β-nucleating additive for polypropylene
The invention relates to a method for enhancing the fraction of β-crystal modification in polypropylene by compounding nanocrystalline substances. A β-fraction of 50–100% is achieved with said...
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6569987 |
Process for producing meta-aromatic polyamide fiber
To produce meta aramid filaments having a good quality from a polymer solution of a meta aramid produced by a solution polymerization method, with high efficiency, (1) a meta aramid is prepared by...
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6515099 |
Shaped article of polyamide resin and production thereof
The polyamide resin shaped article of the present invention is produced by preliminarily melt-kneading a m-xylylene-containing polyamide resin and a layered silicate subjected to a swelling...
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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 C 2 , C 4 , C 5 , C 6 , C 7 or C 8 α-olefin monomer produced in the presence of a metallocene catalyst characterized by a bridged...
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6297345 |
Polyamide having excellent stretching properties
A polyamide with excellent stretching properties is disclosed, which comprises 50 to 99.8 mol % of a unit derived from a lactam and/or an aminocarboxylic acid, 0.1 to 25 mol % of a unit derived...
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6277495 |
Polyimide film, a method for its manufacture and a polyimide film containing metal laminated plate
A polyimide film of birefringence less than 0.01 is formed by drawing a copolymerized polyimide comprising a block component and a random component which are molecularly bonded, wherein the block...
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6255445 |
Polymers having improved processability
Poly(lactones) are provided. The poly(lactones) are obtained by polymerization of a lactone with an initiator system comprising at least one polyfunctional initiator. The poly(lactones) have a...
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6159406 |
Process for rapid crystallization of polyesters and co-polyesters via in-line drafting and flow-induced crystallization
The present invention relates to a process for introducing strain-induced crystallization to polyesters. Specifically, amorphous polymer from the melt phase reactor is first extruded through a...
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6127501 |
Polyethylene membrane steam-sterilizable at 134° C.
Porous polyolefin membrane with a porosity of at least 20%, which is steam sterilizable at elevated temperature, wherein the polyolefin is polyethylene with an intrinsic viscosity of at least 5...
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5948525 |
Biaxially stretched polyester film for forming container and method of producing the film
A biaxially stretched polyester film for forming a container, characterized by being formed of a polyester substantially consisting of an ethylene terephthalate unit and an ethylene naphthalate...
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5935499 |
Method and apparatus of transferring a packet and generating an error detection code therefor
Fibers and yarns of polyethylene terephthalate (PET) and PET copolymers with a sheath/filamentous core microstructure are formed from unoriented and non crystalline "as spun" source fibers and...
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5837806 |
Polyanilines and their manufacture
A polyaniline is characterized by a nuclear magnetic resonance spectrum in its leuco form showing only two 13 C peaks, indicating the substantal absence of chain branching, and preferably by a...
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5830554 |
Method of producing of microporous polyolefin membrane
An efficient method of producing a microporous polyolefin membrane having improved tensile strength and pierce strength is provided, in which a solution having dissolved therein 5% by weight to 50%...
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5756660 |
Process for producing polyethylene material of high strength and high plastic modulus
A polyethylene article such as film or fiber having high strength and high elastic modulus is produced by orienting an ultra-high molecular weight polyethylene having an intrinsic viscosity at...
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5750645 |
Process for the production of calendered film of polypropylene resin
A process which combines a calender with a stretching system and a set of heating rolls is provided in this invention to produce films of polypropylene resin of wide thickness range. The...
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5679758 |
Method for producing shaped articles of soluble wholly aromatic polyamides
Shaped articles are obtained from a polymerization mixture of soluble wholly aromatic polyamides in a gel state.
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5679753 |
Ferroelectric polymer single crystalline body and method of producing the same and use thereof
A ferroelectric polymer single crystalline body consists of a copolymer of ethylene trifluoride and/or ethylene tetrafluoride and vinylidene fluoride in form of a film or a fiber and is used in a...
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5654394 |
Thermoplastic resin film
A thermoplastic resin film wherein the variation in thickness of the film in the longitudinal direction is not more than 5% and the ratio "Pw1/PwT" of the sum of spectral intensities of wave-number...
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5652313 |
Two-stage process for the manufacture of thermoplastic polycarbonate
The present invention provides a two-stage melt process for the manufacture of thermoplastic, solvent-free, low-branched polycarbonates with low OH end-group contents with the use of ammonium or...
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5474730 |
Production of highly birefringent film
A thin, biaxially oriented polyester film which is asymetrically oriented by stretching 1-2 times in the machine direction and about 3-5 times in the transverse direction in the plane of the film...
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5439966 |
Polyethylene oxide temperature - or fluid-sensitive shape memory device
A temperature- and/or polar fluid-sensitive device which comprises a mechanically strained semi-crystalline hydrophilic polymer.
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5431982 |
Unidirectionally long biaxially oriented film of polyethylene-2,6-naphthalenedicarboxylate
A unidirectionally long, biaxially oriented film of polyethylene-2,6-naphthalenedicarboxylate: (A) which has a Young's modulus of 400 to 600 kg/mm 2 in the machine direction and a Young's...
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5320905 |
Ionomers of ethylene/carboxylic acid copolymers
Novel ionomers of normally solid, thermo-plastic, orientable, copolymers of ethylene and at least one alpha,beta-ethylenically-unsaturated carboxylic acid having a relatively high content of the...
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5310866 |
Process for stretching a swollen flexible-chain polymer
Process for stretching an article substantially consisting of a flexible-chain polymer, which is swollen in a solvent for that polymer, in which process an article substantially consisting of a...
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5296580 |
Stretch packaging method employing multi-layer film
A film for stretch packaging comprising as a substrate a film of a linear low density polyethylene having a melt flow rate (190° C.), as measured by an ASTM-D-1238E method, of 0.3 to 8 g/10 min.,...
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5292865 |
Process for preparation and after-treatment of polyester pellets
Process for simultaneous removal of aldehyde, solid-phase postcondensation and drying of linear polyesters and copolyesters by after-treating the polyester pellets with a diffusion surface of 1.95...
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5070180 |
Shrinkable copolyester film
A shrinkable copolyester film having shrinkage of not less than 30% in the direction (main shrink direction) of either the machine direction or the transverse direction after 5 min treatment in an...
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4996291 |
Thermo-shrinkable polyester film
A thermo-shrinkable polyester film of this invention is obtained from a composition that comprises acid components including terephthalic acid and glycol components including ethyleneglycol. The...
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4985538 |
Shrinkable polyester film
A shrinkable polyester film having a sufficient shrinkage, a sufficient resistance to solvent for printing ink, a shrinking property not to cause wrinkles, a warm water resistance sufficient for...
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4939235 |
Biaxially oriented ordered polybenzothiazole film
This invention relates in general to the formation of thick films having a biaxial molecular orientation. Such films are prepared in accordance with the present invention from rod-like extended...
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4868284 |
Process for producing stretched molded articles of conjugated polymers and highly conductive compositions of said polymers
A process for producing a stretched molded article of a conjugated polymer, hich comprises subjecting a polymer precursor having a repeating unit represented by the general formula (I) ##STR1##...
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4857247 |
Method for drawing thermoplastic tubing
The specification discloses a new method and apparatus for treating extruded TEFLON (fluoropolymer) tubing to significantly improve its dimensional and optical characteristics. Diameter tolerance...
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4791177 |
Conjugated polymer film and pyrolyzed product thereof
A high strength and modulus conjugated polymer film which comprises as its principal constitutive unit a conjugated polymer structure represented by the general formula: --R--CHCH n wherein R...
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4769433 |
High strength polyolefins
High strength, substantially linear, highly crystalline, high molecular weight-polyolefin shaped structure having a tenacity of greater than 15 g/den and an initial modulus of greater than 500...
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4619988 |
High strength and high tensile modulus fibers or poly(ethylene oxide)
Strong fibers of poly(ethylene oxide) result from crystallization of the polymer of molecular weight of at least about 500,000 in a shear flow field. Using solutions of a polymer with a molecular...
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4554335 |
Dielectric polymer materials
The dielectric polymer materials are composed of about 25 to 90 mol % of vinylidene fluoride, about 5 to 70 mol % of ethylene trifluoride, and about 1 to 13 mol % of ethylene chloride trifluoride....
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4546030 |
Polyethylene terephthalate film, process for the production thereof and magnetic recording medium therefrom
The present invention relates to a polyethylene terephthalate film having the sum of F-5 values in longitudinal and transverse directions of 3500 to 5000 kg/cm 2 , absolute heat shrinkages in...
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4421708 |
Process for the production of high-strength filaments from dry-spun polyacrylonitrile
High-strength filaments of dry-spun polyacrylonitrile are obtained by a process in which tension-reduced spun filaments are continuously stretched hydrothermally in one or more stages: where it...
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4390674 |
Uniaxially drawn vinylidene fluoride polymers
An elongated material comprising a vinylidene fluoride polymer and having a Young's modulus from 3 to 15 GPa and which, when poled, has a pyroelectric constant from 4 to 15 nC cm -2 K -1 , or a...
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4384107 |
Polyamide comprising substituted biphenylene or substituted stilbene radicals
A class of polyamides comprising recurring units having certain substituted-biphenylene or substituted-stilbene radicals is disclosed. The substituted radicals include substituents so as to confer...
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4360488 |
Removal of solvent from gels of poly(hydroxybutyrate) and shaped articles formed therefrom
A process of forming shaped articles comprising forming a free draining gel from a solution of poly(hydroxybutyrate) in a poor solvent under conditions which cause crystallization of the polymer...
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4356138 |
Production of high strength polyethylene filaments
Production of polyethylene filaments of tenacity at least 30 g/d from a hot, supersaturated solution of high viscosity polyethylene having intrinsic viscosity of at least 11 dl/g, by contacting a...
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4344908 |
Process for making polymer filaments which have a high tensile strength and a high modulus
A process for making polymer filaments which have a high tensile strength and a high modulus by stretching a polymer filament which contains an appreciable amount of polymer solvent at a...
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4254072 |
Process for high modulus polymeric materials
A process for the production of a high modulus filament of polyethylene which comprises heating high density polyethylene to a temperature above its melting point, extruding the polymer to form a...
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4228267 |
Methyl methacrylate-based resin film and sheet
Methyl methacrylate-based resin films and sheets are formulated in a specific composition and molded so as to acquire a specific supra-molecular structure and prove to be useful in fields which...
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4207408 |
High tenacity phenolic resin fibers
Infusible cured phenolic resin fibers of the present invention have a birefringence of at least 2×10 -3 with the x-ray diffraction pattern of the fibers showing an amorphous halo. The tenacity of...
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