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Class 528/308.1 - Polyethylene Terephthalate per se


Subclass of Class 528 - Synthetic resins or natural rubbers -- part of the class 520 series
Definition: Subject matter wherein the process involves either ethylene
No. of patents: 179
Last issue date: 02/01/2011


1          
NumberTitleIssue Date
7879969Crystallizer temperature control via fluid control
A method of crystallizing a plurality of crystallizable polymer pellets includes a step in which the pellets are contacted with a temperature adjusting fluid in a crystallizer. The fluid adjusts the temperature of the pellets by having a temperature sufficient to al...
02/01/2011
7868129Sloped tubular reactor with spaced sequential trays
A sloped tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor can include a plurality of spaced apart internal trays disposed at different elevations in a downwardly sloping elongated tubular member. ...
01/11/2011
7868130Multi-level tubular reactor with vertically spaced segments
A multi-level tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The tubular reactor can include a plurality of horizontally elongated and vertically spaced reactor segments coupled to and extending outwardly from a...
01/11/2011
7842777Sloped tubular reactor with divided flow
A sloped tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor can include a downwardly sloped tubular member, a flow divider disposed in the tubular member, and one or more internal trays disposed in the t...
11/30/2010
7829656Solid phase polymerization catalyst system
The invention is a method for making condensation polymers, such as polyethylene terephthalate polyester. The method includes introducing a catalyst system, which includes a coordination catalyst component and an acid component, to a polycondensation reaction. ...
11/09/2010
7829655Heat-shrinkable polyester film and process for production thereof
In the heat-shrinkable polyester film of the present invention, the main shrinkage direction is the longitudinal direction. In addition, the hot-water heat shrinkage ratios in the longitudinal direction and the width direction when the film is treated in hot water a...
11/09/2010
7718759Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
05/18/2010
7638593Crystallizer temperature control via fluid control
A method of crystallizing a plurality of crystallizable polymer pellets includes a step in which the pellets are contacted with a temperature adjusting fluid in a crystallizer. The fluid adjusts the temperature of the pellets by having a temperature sufficient to al...
12/29/2009
7531618Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
05/12/2009
7501482Crystallizer temperature control via solid additive control
A method of crystallizing polymeric pellets includes a step in which a plurality of polymeric pellets are introduced into a crystallizer. While within the crystallizer, the plurality of pellets is contacted with a plurality of solid additives for the purpose of adju...
03/10/2009
7495067Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
02/24/2009
7446162Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
11/04/2008
7423109Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
09/09/2008
7420026Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
09/02/2008
7375154Polyester/polyamide blend having improved flavor retaining property and clarity
This invention relates to a polyester/polyamide blend having an excellent gas barrier property. More particularly, the present invention relates to combinations of a polyethylene terephthalate polymer and a polyamide polymer having an excellent gas barrier property ...
05/20/2008
7344765Heat-shrinkable polyester film and heat-shrinkable label
A heat-shrinkable polyester film having a multi-layer structure of at least two layers, among which at least one layer is a layer containing a PET bottle-recycled material, wherein a heat shrinkage percentage in a maximum shrinkage direction of a 10 cm square sample...
03/18/2008
7345139Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
03/18/2008
7337074Method and apparatus for determining the mass of portioned units of active substances
A method and the apparatus for determining the mass of portioned units of active substances, in particular capsules, tablets or dragees, involves leading the units of active substances through a microwave resonator and determining the mass from the displacement of t...
02/26/2008
7332563Polyester based fiber and artificial hair using the same
The object of the invention is to provide polyester-based fiber which maintains physical properties of usual polyester fiber, such as heat resistance, strength and elongation and is excellent in setting ability with controlled gloss of the fiber, artificial hair usi...
02/19/2008
7323529Method of making copolymers containing olefinic type monomers
Copolymers containing residues of at least one olefinic monomer and a method of making such copolymers including the steps of: (a) providing a pressurized stirred tank; (b) feeding monomer compositions to one or more stirred tank reactors, ...
01/29/2008
7306835Thermo-shrinkable polyester film
The present invention relates to a thermo-shrinkable polyester film with a superior thermal shrinkage, which has an orientation angle of a molecular chain in a range of from 0° to about ±10° relative to a main shrinkage direction, and a molecular orientation rati...
12/11/2007
7271236Preparation method of polyester resin
A preparation method of a polyester resin includes: under predetermined depolymerization conditions, mixing a polyester resin, a resin dissolvent and a polycondensation catalyst to depolymerize the polyester resin and form a first reaction mixture; adding a first mo...
09/18/2007
7241854Thermoplastic polyurethanes
Thermoplastic polyurethanes are obtainable by reacting (a) isocyanates with (b1) polyesterdiols having a melting point greater than 150° C., (b2) polyetherdiols and/or polyesterdiols, each having a melting point of less than 150° C. and a molecular weight of from ...
07/10/2007
7211193Processes for the purification of bis(2-hydroxyethyl)terephthalate
A method is disclosed for efficiently obtaining BHET of high purity from an EG (ethylene glycol) solution containing crude BHET (bis(2-hydroxyethyl)terephthalate), especially a decomposition product solution obtained by decomposing a polyester containing PET (polyet...
05/01/2007
7138481Process for producing polyester resin
A polyester resin prepared by polycondensing a dicarboxylic acid component containing terephthalic acid or derivative thereof with a diol component containing ethylene glycol through esterification or transesterification, thereby producing a melt polymerization poly...
11/21/2006
7132484Continuous process for producing poly (trimethylene terephthalate)
A continuous process for the production of poly(trimethylene terephthalate) is disclosed. According to the process, a liquid feed mixture comprising bis-3-hydroxypropyl terephthalate and/or low molecular weight polyesters of 1,3-propanediol and terephthalic acid, th...
11/07/2006
7128968Biaxially oriented polyester film which is matt on one side, process for its production and its use
Biaxially oriented polyester films which have at least one polyester-containing base layer (B) and at least one matt overlayer (A), the overlayer (A) comprising particles, preferably SiO2, which have a median diameter of from 2 to 10 μm and have a SPAN98...
10/31/2006
H2169Method 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
7014970Resin composition
A resin composition having a softening point of from 80° to 165° C., obtained by reacting a poly C2-4 alkylene terephthalate having a melting point of 200° C. or more with a low-molecular weight polyester having a number-average molecular weight of fro...
03/21/2006
7015267Polyethylene terephthalate compositions
A method for increasing the crystallization rate of a polyethylene terepthalate (PET) prepared based on terepthalic acid (TPA) and ethylene glycol monomers, by adding into said TPA-based PET an effective amount of a polyethylene terepthalate prepared based on dimeth...
03/21/2006
6984430Polyester film for release film
An object of the present invention is provide a polyester film useful as base for release film according to which when a ceramic slurry is applied on the release film, formation of pinholes in the ceramic slurry layer is suppressed prominently, and also when a ceram...
01/10/2006
6951954Continuous process for producing bis(3-hydroxypropyl) terephthalate
A process for the continuous production of at least one of bis(3-hydroxypropyl) terephthalate and low molecular weight oligomers of 1,3-propanediol and terephthalic acid is disclosed. According to the process, preheated 1,3-propanediol (about 150° C. to about 200°...
10/04/2005
6913817Biaxially oriented polyester film which is matt on one side and has characteristic shrinkage properties, process for its preparation and its uses
Biaxially oriented polyester films which have a polyester-containing base layer (B) and a matt overlayer (A), and are characterized by the following features: a) the transverse shrinkage of the film is between 1 and 2.3%, b) the transverse linear expansion of the fi...
07/05/2005
6906164Polyester process using a pipe reactor
The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior ar...
06/14/2005
6905774Biaxially-oriented polyester film for fabrication and method of producing the same
Biaxially-drawn polyester film for fabrication which is characterized in that it is a film comprising polyester in which ethylene terephthalate units and/or ethylene naphthalate units are the chief structural component, and the melting point of said film is 180-270Â...
06/14/2005
6902819Biaxially oriented polyester film
The biaxially oriented polyester film of the present invention useful for twist wrapping is prepared by biaxially drawing a polyester sheet which has a glass transition temperature (Tg) of at least 60° C., in the longitudinal and transverse directions, wherein the ...
06/07/2005
6902803Dimensionally 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
6902802Low temperature heat-sealable polyester film and method for producing the same
The present invention provides a heat-sealable polyester composition having an amorphous processing window ranging from a Tg in the range of about 40° C. to about 70° C., to a Tcg in the range of about 70° C. to about 150° C. The composition preferably contains ...
06/07/2005
6893706White, biaxially-oriented polyester film with cycloolefin copolymer (COC), which is matt on at least one side, method for production and use thereof
The invention relates to a white, biaxially-oriented and coextruded polyester film which is matt on at least one side with at least one base layer B, which contains a cycloolefin copolymer (COC) in amounts of 4 to 60 wt. %, based on the weight of the base layer, in ...
05/17/2005
6884558Resin composition
A resin composition having a softening point of from 80° to 165° C., obtained by reacting a poly C2-4 alkylene terephthalate having a melting point of 200° C. or more with a low-molecular weight polyester having a number-average molecular weight of fro...
04/26/2005
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