Patents by Inventor Guenther Crass

Guenther Crass has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6794432
    Abstract: The invention concerns transparent, flame-retardant, single layered or multilayered thermoformable films, containing a crystallizable thermoplastic material, preferably polyethyleneterephthalate, and at least one flame retarding agent as main components. Said films are characterized by good stretchability, thermoformability and good mechanical and optical properties, which makes them and the shaped bodies made from said films suitable for both inner and outer applications.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: September 21, 2004
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Andreas Stopp, Guenther Crass
  • Patent number: 6730406
    Abstract: The invention relates to a co-extruded, biaxially oriented polyester film consisting of a base layer and at least one outer layer. The film contains at least one flame-retardant agent, at least one UV-stabilizer and has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is substantially a polyethylene terephthalate homopolymer, or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephthalate homopolymers or polyethylene terephthalate copolymers, and component (II) is a polymer containing at least one sulphonate group.
    Type: Grant
    Filed: July 18, 2002
    Date of Patent: May 4, 2004
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Gottfried Hilkert
  • Publication number: 20040067379
    Abstract: Biaxially oriented, coextruded polyester films with a base layer at least 90% by weight of which is composed of a thermoplastic polyester, preferably polyethylene terephthalate (PET), and with at least one sealable outer layer and a second nonsealable outer layer and, if desired, with other intermediate layers, and comprising at least one UV absorber, preferably hydroxybenzotriazoles and triazines, have high UV resistance, do not embrittle when exposed to high temperatures, have a surface without undesirable haze and are suitable for numerous indoor and outdoor applications. The outer layers comprise antiblocking agents, such as silica with an average particle diameter preferably below 50 nm and/or above 2 &mgr;m, and the sealable outer layer is preferably composed of a copolyester which has been built up from ethylene terephthalate units and ethylene isophthalate units.
    Type: Application
    Filed: May 5, 2003
    Publication date: April 8, 2004
    Inventors: Herbert Peiffer, Guenther Crass, Ulrich Kern, Ursula Murschall, Andreas Stopp
  • Patent number: 6709731
    Abstract: The invention relates to a sealable, UV-resistant and flame-retardant, coextruded, biaxially oriented polyester film with one matt side and composed of at least one base layer B and of, applied to the two sides of this base layer, a sealable outer layer A and matt outer layer C. The film also comprises at least one light stabilizer which is a UV stabilizer, and comprises a flame retardant. The invention also includes the use of the film and a process for its production.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: March 23, 2004
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Herbert Peiffer, Hans Mahl
  • Publication number: 20040028926
    Abstract: The application discloses a transparent, biaxially oriented polyester film having a base layer at least 80% by weight of which is composed of a thermoplastic polyester, and having at least one outer layer, wherein the outer layer is composed of a polymer, or of a mixture of polymers, which comprises at least 40% by weight of ethylene 2,6-naphthalate units and up to 40% by weight of ethylene terephthalate units and/or units from cycloaliphatic or aromatic diols and/or dicarboxylic acids, with the proviso that the Tg2 value of the polyester film is above the Tg2 value of the base layer but below the Tg2 value of the outer layer, and at least one film surface has a surface tension of from 35 to 65 mN/m and/or has been provided with a functional coating of thickness from 5 to 100 nm. The film has low atmospheric oxygen transmission. It is particularly suitable for packaging uses, specifically for packaging foods and other consumable items, and for laminating, metallizing and printing.
    Type: Application
    Filed: August 12, 2003
    Publication date: February 12, 2004
    Applicant: Mitsubishi Polyester Film GmbH, Reel 010017, Frame 0288.
    Inventors: Herbert Peiffer, Cynthia Bennett, Guenther Crass, Gottfried Hilkert, Werner Roth
  • Patent number: 6689454
    Abstract: The invention relates to a white, flame-resistant, UV-stable, thermoformable, oriented film made from a crystallizable thermoplastic, the thickness of which lies in the range of from 10 &mgr;m to 350 &mgr;m. Said film comprises at least one white pigment, a flame-proofing agent and a UV absorber and is characterized by good stretchability and thermoformability, by good optical and mechanical properties and an economical production. The invention further relates to a method for the production of said film and the use thereof.
    Type: Grant
    Filed: July 19, 2002
    Date of Patent: February 10, 2004
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Guenther Crass, Ulrich Kern, Klaus Oberlaender
  • Publication number: 20030235703
    Abstract: The invention relates to an at least two-layer polyester film with a total thickness of from about 5 to about 200 &mgr;m which comprises polyethylene terephthalate and from about 2 to about 20% by weight—based on the weight of the entire film—of polyethylene naphthalate, and also at least one functional outer layer.
    Type: Application
    Filed: June 16, 2003
    Publication date: December 25, 2003
    Inventors: Holger Kliesch, Ursula Murschall, Franz Hora, Guenther Crass, Herbert Peiffer, Bodo Kuhmann
  • Patent number: 6649247
    Abstract: The invention relates to a sealable, flame-retardant, coextruded, biaxially oriented polyester film with one matt side, and composed of at least one base layer B and of, applied to the two sides of this base layer, a sealable outer layer A and a matt outer layer C. The film also comprises at least one flame retardant. The invention further relates to the use of the film and to a process for its production.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: November 18, 2003
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Herbert Peiffer, Hans Mahl
  • Publication number: 20030203227
    Abstract: A transparent film whose thickness is in the range from 1 to 500 &mgr;m 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 the use of the film, and also to a process for its production.
    Type: Application
    Filed: May 2, 2003
    Publication date: October 30, 2003
    Applicant: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Guenther Crass, Guenter Bewer, Klaus Oberlaender
  • Patent number: 6630224
    Abstract: The invention relates to a matt, biaxially oriented polyester film having at least one matt base layer (B) which comprises at least 70% by weight of thermoplastic polyester, and also a pigment system with narrow grain size distribution. The invention further relates to the use of the film and to a process for its production. The film of the invention has characteristic matt surfaces and has good suitability for use as a packaging film or for industrial applications.
    Type: Grant
    Filed: September 10, 2001
    Date of Patent: October 7, 2003
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Herbert Peiffer, Guenther Crass, Gottfried Hilkert
  • Publication number: 20030171465
    Abstract: The invention relates to a flame-retardant oriented thermoplastic film with a thickness in the range from 0.5 to 12 &mgr;m. The film comprises at least one flame retardant and has a conductive coating. This film may also possess at least one functionality additional to the flame retardancy. The expression “additional functionality” comprehends the shrinkage and the solderability. All films of this kind feature low flammability and good dielectric properties. In particular, they have a high tracking resistance and a low dissipation factor, and may also have one or more further functionalities. The invention additionally relates to a process for producing the polyester film and to its use in film capacitors.
    Type: Application
    Filed: March 4, 2003
    Publication date: September 11, 2003
    Inventors: Holger Kliesch, Gottfried Hilkert, Ursula Murschall, Annegrete Bursch, Guenther Crass
  • Publication number: 20030157352
    Abstract: The invention relates to a co-extruded, biaxially oriented polyester film consisting of a base layer and at least one outer layer. The film contains a UV-stabiliser and has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is substantially a polyethylene terephtalate homopolymer or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephtalate homopolymers or polyethylene terephthalate copolymers, and component (II) is a polymer which contains at least one sulphonate group.
    Type: Application
    Filed: July 18, 2002
    Publication date: August 21, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Gottfried Hilkert
  • Patent number: 6607822
    Abstract: The present invention relates to an at least single-layer, biaxially oriented film support for magnetic recording media which is predominantly composed of crystallizable polyester, having a thickness in the range from 1 to 40 &mgr;m. The film has, over its total roll length and roll width and after it has been made up into customer rolls, an electrostatic charge build-up which is in the range from −80 kV/m to +80 kV/m, the contact pressure at the roll cutters during make-up being set in the range from 300 N/m to 350 N/m. The film is drawn between electrical discharge means, which are arranged close to the roll, along the film path in the make-up machine, and is particularly suitable for high-quality audio, video or computer tapes and for floppy disks or thermal tapes.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: August 19, 2003
    Assignee: Mitsubishi Polyester Film GmbH
    Inventors: Ursula Murschall, Andreas Stopp, Guenther Crass, Harald Mueller
  • Publication number: 20030118817
    Abstract: The invention relates to a sealable, flame-retardant, coextruded, biaxially oriented polyester film with one matt side, and composed of at least one base layer B and of, applied to the two sides of this base layer, a sealable outer layer A and a matt outer layer C. The film also comprises at least one flame retardant. The invention further relates to the use of the film and to a process for its production.
    Type: Application
    Filed: July 26, 2002
    Publication date: June 26, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Herbert Peiffer, Hans Mahl
  • Publication number: 20030113568
    Abstract: The invention relates to a white film with a thickness in the range of 1 to 500 &mgr;m that contains a crystallizable thermoplast as the main component. The inventive film is further characterized in that it contains at least one UV stabilizer as the light stabilizer and at least one white pigment. The invention further relates to a method for producing said film and the use thereof.
    Type: Application
    Filed: July 19, 2002
    Publication date: June 19, 2003
    Inventors: Ursula Murschall, Klaus Oberlaender, Guenther Crass, Ulrich Kern
  • Publication number: 20030108755
    Abstract: The invention relates to biaxially oriented, co-extruded polyester films. Said films comprise a base layer which consists of at least 70% by weight of a thermoplastic polyester, preferably polyethylene terephthalate (PET) with a diethylene glycol and/or polyethylene glycol content greater than 1.3% by weight and have at least one matt outer layer and optionally additional intermediate layers. The films also contain at least one UV-absorber, preferably hydroxy benzotriazoles and triazines. The films are characterised by high UV-stability, no embrittlement after exposure to temperature, a matt surface devoid of unwanted clouding and excellent thermoforming properties and are, together with the molded bodies produced therefrom, suitable for numerous interior and exterior applications.
    Type: Application
    Filed: July 18, 2002
    Publication date: June 12, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass
  • Publication number: 20030108754
    Abstract: The invention relates to a co-extruded, biaxially oriented polyester film consisting of a base layer and at least one outer layer. The film contains at least one flame-retardant agent, at least one UV-stabilizer and has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is substantially a polyethylene terephthalate homopolymer, or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephthalate homopolymers or polyethylene terephthalate copolymers, and component (II) is a polymer containing at least one sulphonate group.
    Type: Application
    Filed: July 18, 2002
    Publication date: June 12, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Gottfried Hilkert
  • Publication number: 20030099846
    Abstract: Biaxially oriented, co-extruded polyester films comprising a base layer consisting of at least 90 wt. % thermoplastic polyester, preferably polyethylene terephthalate (PET), at least one sealable outer layer and a second non-sealable outer layer and, optionally, other intermediate layers, in addition to at least one flame-retardant agent, preferably organic phosphorous compounds. The inventive films are characterized by low inflammability, no embrittlement when subjected to thermal stress and a surface which is devoid of troublesome opacity, and are suitable for a multiplicity of uses both indoors and outside. The outer layers contain anti-blocking agents such as silicic acid having a particle diameter of preferably less than 50 nm and/or more than 2 &mgr;m. Preferably, the sealable outer layer consists of a copolyester which is made of ethylene terephthalate and ethylene isophthalate units.
    Type: Application
    Filed: July 26, 2002
    Publication date: May 29, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Andreas Stopp, Guenther Crass, Herbert Peiffer
  • Publication number: 20030091843
    Abstract: The invention relates to a single- or multilayer, transparent, amorphous film which comprises at least one crystallizable thermoplastic as main constituent, in particular a polyester, and also comprises at least one hydrolysis stabilizer. The hydrolysis stabilizer is preferably a phenolic compound, an oxazoline, and/or a monomeric or polymeric carbodiimide, where appropriate combined with an organic phosphite. It is preferably added in the form of a masterbatch. On exposure to moisture and heat it shows practically no embrittlement and retains its tensile stress at break. The film may have been rendered UV-resistant, or flame-retardant, or one side or on both sides have been coated, or be sealable, and/or have been corona- or flame-treated. It is generally produced by extrusion or coextrusion, the hydrolysis stabilizer being added in the form of a predried or precrystallized masterbatch. The film can be shaped particularly effectively by thermoforming.
    Type: Application
    Filed: September 27, 2002
    Publication date: May 15, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass
  • Publication number: 20030087105
    Abstract: The invention relates to a co-extruded, biaxially oriented polyester film containing a flame-retardant agent which can be dissolved in the polyester. The film has a matt outer layer which contains a mixture and/or a blend of two components (I) and (II), whereby component (I) is a polyethylene terephthalate homopolymer, or a polyethylene terephthalate copolymer, or a mixture of polyethylene terephthalate homopolymers or copolymers and component (II) is a polymer containing at least one sulphonate group.
    Type: Application
    Filed: July 18, 2002
    Publication date: May 8, 2003
    Inventors: Ursula Murschall, Ulrich Kern, Guenther Crass, Gottfried Hilkert