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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...
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H002169 |
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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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.
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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...
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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...
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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...
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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...
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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...
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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...
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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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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...
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5444144 |
Process for producing polyethylene terephthalate
A process for producing polyethylene terephthalate comprises the following steps 1 and 2: 1 a moisture conditioning step of contacting a polyethylene terephthalate having an intrinsic viscosity...
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5440005 |
Process and apparatus for solid phase polymerization of polymers
A process and apparatus for the solid phase polymerization of polymers wherein cold amorphous polymer is introduced to a crystallizer. Hot heat transfer liquid is employed in the crystallizer for...
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5439719 |
Process for preparing a high-molecular-weight polyester
A high-molecular-weight polyester is to be prepared in such a way that it is possible to very quickly and advantageously obtain even relatively small amounts having a very high molecular weight....
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5412063 |
Solid state polymerization of polyesters with low diffusion resistance prepolymer granules
Polyester prepolymer granules with open-ended cavities provide greatly improved solid state polymerization rates by improving reaction by-product diffusion characteristics.
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5409983 |
Refillable bottle of polyethylene terephthalate copolymer and its manufacture
Refillable polyethylene terephthalate (PET) bottles are made by injection stretch blow moulding and comprise a threaded neck of transparent amorphous substantially non-oriented PET; a substantially...
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5408035 |
Solid state polymerization
This invention is a process for solid state polymerization of polyester using multiple reactors in series to achieve molecular weight increases, as measured by intrinsic viscosity, in excess of...
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5393871 |
Production of polyesters and polyester articles having good clarity
Disclosed is an improvement in a process for producing linear polyesters wherein a precursor polyester is first formed and subsequently the precursor polyester is formed into particles and further...
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5393863 |
Production of branched polyesters
Disclosed is an improvement in a process for producing branched polyesters wherein a precursor polyester is first formed and subsequently the precursor polyester is formed into particles and...
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5370929 |
Polyester fiber, process for the production and process for the dyeing of the fibrous structure of the polyester fiber
A fiber of a polyester, in which 80% or more of the repeating units are composed of ethylene terephthalate, characterized in that it satisfies the following inequalities: 0.16<tan δ max ...
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5362844 |
Continuous process for the production of polyester for food packaging
A continuous process for the production of low-modified polyethylene terephthalate for food packaging in which, while maintaining specific processing conditions, a precondensate is polycondensed in...
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5350632 |
Impregnated, dimension-stable polyester cord
The dimension-stable impregnated polyester tire cord is at least 95% by weight polyethylene terephthalate and has an intrinsic viscosity of 0.70 dl/g to 0.89 dl/g for undrawn cord, a fineness of at...
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RE34727 |
Low-shrinkage polyester film and preparation thereof
A biaxially oriented polyester film simultaneously satisfying the following formulas (I) to (III): │S 180 -S 120 │≤54 (I) T S MD ≥100 (II) Q...
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5332625 |
Polymer with crosslinked surface zones
The present invention is a surface modification process which provides a means of rapidly heating a thin layer of a polymer surface or a thin coating of material on a coated substrate and various...
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5326830 |
Process for preparing chain extended polymers and graft and block copolymers
The invention relates to a process for forming chain extended polymers and graft and block polymers and copolymers which comprises the steps of: (a) forming an intimate mixture of one or more...
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5308892 |
Process for the preparation of polyester-masterbatch containing finely divided additives
Process for the manufacture of a polyester masterbatch containing finely divided solid additives in homogenous and agglomerate-free distribution, through the mixing, within a homogenizing extruder,...
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5276083 |
Continuous polyester filaments available for composing carpets
This invention is directed to continuous polyester filaments in tufted form for composing quality carpets having a pleasing appearance. The carpets are formed by use of continuous polyester...
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5270444 |
Process for treatment of polyethylene terephthalate, polyethylene terephthalate for molding purposes and process for preparation thereof
According to the present invention, a process which comprises bringing polyethylene terephthalate having an intrinsic viscosity of at least 0.50 dl/g and a density of 1.38 g/cm 3 or more into...
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5268135 |
Biaxial oriented polyester film
A biaxial oriented polyester film of the present invention has a density of 1.386 g/cm 3 or more. A sum Y of the coefficients of the heat shrinkage in the machine direction and in the transverse...
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5243020 |
Process for the continuous production of high molecular weight polyester resin
The intrinsic viscosities have been determined on a solution of 0,5 g. of polyester pellets into 100 ml. of solution phenol/tetrachloroethane with a weight ratio of 60:40 at a temperature of 25°...
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5235027 |
Modified copolyethylene terephthalate
Modified copolyethylene terephthalate, for processing by extrusion blow molding, containing units of isophthalic acid, diethylene glycol and pentaerythritol, antimony and phosphorus plus small...
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5225448 |
Preparation of porous polyester beads
High molecular weight polyethyleneterephthalate resin is currently being used in vast quantities in manufacturing tire cord and in manufacturing trays for frozen foods which can be heated in either...
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5091504 |
Enhanced polyester copolymer fiber
The invention is a method of producing a polyester filament which has a superior combination of tensile, dyeability and shrinkage properties. The method comprises forming a polyester-polyethylene...
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5071690 |
Moldable biaxially stretched polyester film
Disclosed herein is a moldable biaxially stretched polyester film having a tensile strength at 100% elongation (F 100 ), measured in an atmosphere of 150° C., of 0.5 to 7 kg/mm 2 . The biaxially...
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5070185 |
High shrinkage polyester fibers and method of preparation
High shrinkage polyester fibers having good strength and uniform dyeability are disclosed, along with a method of producing the high shrinkage polyester fibers, by drawing a feeder yarn having a...
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