Patents by Inventor Walter Bontinck

Walter Bontinck 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: 4367312
    Abstract: Heat-sealable packaging film producing a peelable seal, process for the preparation thereof and packages made therefrom or comprising such a film. This film produces such a seal on a wide range of packaging films, including polyester, polyvinyl chloride, polyamide and polyacrylonitrile films owing to:1. its chemical composition which comprises:(a) 55 to 95% by weight of at least one ethylene polymer selected from polyethylene having a density of from 0.91 to 0.93 g/cm.sup.3 and an ethylene-vinyl acetate copolymer containing at most 10% by weight of vinyl acetate,(b) 5 to 30% by weight of polystyrene, and(c) 0 to 20% by weight of a thermoplastic, elastomeric styrene-butadiene-styrene or styrene-isoprene-styrene block copolymer, and2. the fact that that face of the film which is intended to form the peelable seal, has a surface tension of from 35 to 50, preferably of 37 to 45 millinewtons per meter. The film is prepared by extrusion followed by a corona discharge pretreatment of said face.
    Type: Grant
    Filed: August 7, 1980
    Date of Patent: January 4, 1983
    Assignee: UCB, Societe Anonyme
    Inventors: Walter Bontinck, Marc D'Hondt, Roland Jacobs
  • Patent number: 4026718
    Abstract: A modified regenerated cellulose film comprising regenerated cellulose and certain modified starches is clear and transparent and has substantially the same mechanical and optical properties as conventional unmodified regenerated cellulose films. The modified starches used are starches degraded by oxidation and/or hydrolysis, uncrosslinked ethers or esters of starch or of starches degraded by oxidation and/or hydrolysis or mixtures thereof. The amount of modified starch used represents 1 to 49% by weight, preferably 5 to 30% by weight, based on the total weight of cellulose and modified starch. Methods for the production of said modified regenerated cellulose film either by the viscose process or by the cuprammonium process are also described.
    Type: Grant
    Filed: September 16, 1975
    Date of Patent: May 31, 1977
    Assignee: U.C.B, Societe Anonyme
    Inventors: Georges Cornille, Roland Jacobs, Walter Bontinck
  • Patent number: 3993718
    Abstract: The present invention relates to a process and a composition for the manufacture of an artificial paper requiring neither calendering nor biorientation, the paper obtained having in addition to the characteristics proper to cellulose paper, improved physical properties, such as better impermeability to water vapor and air, resistance to greases and dimensional stability under various atmospheric conditions.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: November 23, 1976
    Assignee: U.C.B., Societe Anonyme
    Inventors: Walter Bontinck, Willy De Coster