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| Number | Title | Issue Date |
| 7977448 | Method for producing highly condensed solid-phase polyesters The invention relates to a continuous or discontinuous method for the production of highly condensed polyesters in the solid state, comprising a crystallization of a polyester material, wherein the crystallization is carried out in the presence of a gas with a dew p... | 07/12/2011 |
| 7683156 | Production of a high-molecular polycondensate The invention relates to a method for producing a high-molecular polycondensate from a solidified polycondensate prepolymer by solid phase polycondensation. According to said method, the polycondensation cleavage products of the solid phase polycondensation reaction... | 03/23/2010 |
| 7361422 | Leader tape and magnetic tape cartridge using the same A leader tape in which an non-magnetic under layer that contains a powder and a binder and a magnetic upper layer are sequentially laminated on at least one side of a support, a center line average roughness (Ra) of a surface of the support is from 30 to 50 nm, and ... | 04/22/2008 |
| 7291694 | Method and device for producing crystallizable plastic material A method for manufacturing a crystallizable plastic material is disclosed. The process includes the step of melting an amorphous plastic material, pelletizing the material, crystallizing it and then post condensing the plastic material with the proviso that the plas... | 11/06/2007 |
| 7282110 | Method of making an endless image-forming medium A method of making an endless image-forming medium starting from a strip of semi-crystalline support material, which strip extends between a first and second end, wherein the ends of the strip are brought together and fused to form an endless support, and the fused ... | 10/16/2007 |
| 7262263 | Method and apparatus for producing solid-state polycondensed polyesters The present invention relates to a method for producing solid-state polycondensed polyesters by using crystallization with or without subsequent solid-state polycondensation for producing bottles, sheets, films, and high-tenacity technical filaments. ... | 08/28/2007 |
| 7205379 | Process for preparing a stabilized polyester The present invention discloses a process for the preparation of a stabilized polyester that is low in the generation of aldehydes which comprises reacting one or more diacids with one or more diols in an esterification process, and/or one or more diesters with one ... | 04/17/2007 |
| 7179881 | Process for heating PET pellet feed to a solid stating process by heat exchange with hot solid stated pellets Considerable energy savings may be realized by recovering heat from hot PET pellets exiting a solid state polymerization reactor, and using this heat to heat cool pellets entering the crystallizer or solid state polymerization reactor. The heat may be transferred fr... | 02/20/2007 |
| H2169 | Method of manufacturing partially crystalline polyester articles A method of making a polyethylene terephthalate/polyolefin blend for sheeting and thermoformed articles which has improved color stability and can be recycled many times. A heat stabilizer is melt blended only with the polyolefin prior to its incorporation into the ... | 09/05/2006 |
| 6921580 | Polyester film for display The present invention relates to a polyester film for display comprising: a polyester film substrate containing an ultraviolet light absorber; and a coating layer formed on at least one surface of said polyester film substrate, said polyester fi... | 07/26/2005 |
| 6902803 | Dimensionally stable yarns An undrawn yarn is produced at increased quench delay and increased take-up speed to achieve improved ultimate elongation at a given crystallinity. Particularly preferred aspects include products comprising such yarns and methods for producing same. ... | 06/07/2005 |
| 6855757 | Preparation of glycol carboxyethylmethylphosphinate The invention relates to a process of preparing glycol carboxyethylmethylphosphinate, which comprises a) reacting elemental yellow phosphorus with methyl chloride in the presence of an alkali or alkaline earth metal hydroxide to fo... | 02/15/2005 |
| 6855435 | Transparent, UV-stabilized film made from a crystallizable thermoplastic A transparent film whose thickness is in the range from 1 to 500 μm and which comprises, as principal constituent, a crystallizable thermoplastic, wherein the film comprises at least one UV stabilizer as light stabilizer and at least one optical brightener, and to ... | 02/15/2005 |
| 6716959 | Device and method for treating plastic material The invention relates to a method for treating plastic material, especially polyethylene terephthalate, wherein the relatively low temperature material is initially crystallized by heating before subjecting said material to heating or condensation in the solid phase... | 04/06/2004 |
| 6696146 | Mono-or biaxially-stretched polyester resin foamed sheets and films Mono- or biaxially-stretched polyester resin foamed sheets and films wherein the polyester resin has a melt strength of more than 1 centinewton at 280° C., a melt viscosity of at least 1500 Pa.s at 280° C. for a shear ratio which tends to zero and a cry... | 02/24/2004 |
| 6511624 | Process for preparing industrial polyester multifilament yarn Disclosed is a process for preparing a high modulus and a low shrinkage polyester multifilament yarn of 1000 deniers or more at a spinning rate of 2,000 m/min or more, comprising the steps of: melt-extruding polyester chips having an intrinsic viscosity o... | 01/28/2003 |
| 6369192 | Methods for removing contaminants from polymers The present invention relates to a method for treating plastic polymers to reduce or remove organic contaminants. More particularly, the present invention relates to a method of treating, by continuous means, a flowable polymer mass with a solvating fluid... | 04/09/2002 |
| 6066713 | Process for improving the drawing ability of polyester A process for the improvement of the drawing ability of polyester, pellets of which are thermally post-treated in the solid phase in an inert atmosphere, containing a precise concentration of water vapor. The water vapor concentration is equal to the amou... | 05/23/2000 |
| 6056901 | Method for manufacture of regenerated synthetic resin product A method which is capable of manufacturing regenerated synthetic resin products, particularly slide fastener parts of regenerated synthetic resin, with good quality by using as a raw material such waste synthetic resin materials as emanate from the produc... | 05/02/2000 |
| 6020453 | Lactic acid excreting polylactide sheet for use in absorbent articles Surface material for an absorbent article, wherein the material includes a surface layer which excretes lactic acid and/or an acid physiologically acceptable derivative thereof when the surface layer is immersed in a water volume, the weight ratio between... | 02/01/2000 |
| 5830981 | Process for producing polyethylene terephthalate A process for producing a polyethylene terephthalate in which the amount of the oligomers, such as cyclic trimer etc., is lower and which causes metal mold staining to occur difficultly. The process comprises an esterification stage in which dicarboxylica... | 11/03/1998 |
| 5817747 | Cooling process for polyester and/or polymide resins Cooling process for polyester and/or polyamide resins downstream of solid-state polycondensation plants in which the cooling is carried out by passing the solid material through two types of equipment in series, of which one is a fluid-bed, the other is a... | 10/06/1998 |
| 5753736 | Dimensionally stable fibers and non-woven webs Dimensionally stable (shrink-resistant) polyester fibers, webs and fabrics, comprising a nucleating agent incorporated into the fibers are disclosed. Methods of incorporating the nucleating agent within the polyester are disclosed.... | 05/19/1998 |
| 5714262 | Production of poly(ethylene terephthalate) Disclosed herein is a novel crystalline form of low molecular weight poly(ethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(ethylene terephthalate) material by means of rapid heat transfer to or... | 02/03/1998 |
| 5714571 | Process for the crystallization of polyester resins Aromatic polyester resins are continuously crystallized in a fluid bed crystallizer, where the fluidizing gas (nitrogen) enters at a temperature not lower than 195° C. and the average residence time is higher than 5 minutes.... | 02/03/1998 |
| 5708124 | Process for the solid state polycondensation of polyester resins Process for the solid state polycondensation of polyester resins, where an inert gas is circulating in a moving bed of polymer at a temperature between 180° and 230° C., characterized by the fact that the ratio by weight between the gas rate of flow per... | 01/13/1998 |
| 5705601 | Process for producing polyester film A process for producing a polyester film is disclosed, which comprises melt-mixing from 3 to 12 parts by weight of a master polymer comprising a poly(alkylene terephthalate) which contains from 0.3 to 3 wt % inorganic lubricant and has an intrinsic viscos... | 01/06/1998 |
| 5703134 | Copolymers of recycled polyester New copolymers of recycled polyesters having improved properties are disclosed. The copolyesters are produced by a reaction of recycled polyalkylene terephthalate and a dicarboxylate moiety.... | 12/30/1997 |
| 5681655 | Filaments with high elastic modulus from polyester resins Filaments from a polyester resin having an elastic modulus higher than 30 GPa and stress at break greater than 300 MPa. The filaments are obtained by upgrading under stretch filaments prepared from polyester resin mixed in the melt with a polyfunctional c... | 10/28/1997 |
| 5602187 | Polyethylene terephthalate decontamination A process for removing contaminants from material containing polyethylene terephthalate ("PET") which has been embrittled by mixing material containing PET with ethanediol having a temperature at or about the boiling point of ethanediol for a predetermine... | 02/11/1997 |
| 5573820 | Process for preparing polyester The invention provides a process for preparing a polyester comprising a liquid phase polycondensation step in which a dicarboxylic acid including terephthalic acid or its ester derivative and a diol including ethylene glycol or its ester derivative are su... | 11/12/1996 |
| 5569510 | Process for the production of polyester resins for fibers Process for the production of polyester resins suitable for the manufacture of fibers including a phase of esterification of an aromatic dicarboxylic acid with an alkylenic glycol or of transesterification of a diester of the dicarboxylic acid with the al... | 10/29/1996 |
| 5540868 | Process for pellet formation from amorphous polyester The present invention relates to a process for forming robust, uniform, low molecular weight crystalline polyester particles. Such particles are useful for forming higher molecular weight polyesters, for example, by solid-state polymerization. Either conv... | 07/30/1996 |
| 5536810 | Process for thermal treatment of polyester chips in the solid state Process for thermal solid-state treatment of chips of saturated polyester, where the chips are crystallized immediately before the thermal treatment and the thermal treatment is carried out in a static bed at a chip temperature that is equal to TE (1 μm)... | 07/16/1996 |
| 5532333 | Production of poly(ethylene terephthalate) Disclosed herein is a novel crystalline form of low molecular weight poly(ethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(ethylene terephthalate) material by means of rapid heat transfer to or... | 07/02/1996 |
| 5516880 | Fluid bed cooling system for polymer processing A system for the solid phase polymerization of polymers wherein cold amorphous polymer is introduced to a crystallizer and heated to crystallize the polymer, the crystallized polymer is discharged to a reactor to achieve polymerization of the polymer, and... | 05/14/1996 |
| 5510454 | Production of poly(ethylene terephthalate) Disclosed herein is a novel crystalline form of low molecular weight poly(ethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(ethylene terephthalate) material by means of rapid heat transfer to or... | 04/23/1996 |
| 5504121 | Polyethylene terephthalate decontamination A process for removing contaminants from PET components by depolymerising poly ethylene terephthalate ("PET") comprising transesterifying material containing PET by reacting ethanediol having a temperature at or about the boiling point of ethanediol with ... | 04/02/1996 |
| 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 is disclosed. The film has a birefringence of at least 0.08... | 12/12/1995 |
| 5463015 | Magnetic tape for use in cassette for digital audio tape recorder and biaxially oriented polyester base film therefor There is provided a biaxially oriented polyester base film for a magnetic tape for use in a cassette for a digital audio tape recorder. The film has (a) a stress when the biaxially oriented polyester base film is extended in the longitudinal direction by ... | 10/31/1995 |
