Patents Assigned to Scriptoria N.V.
  • Method of forming boards of foam polyolefin using needle punching to release blowing agent
    Patent number: 5776390
    Abstract: A board of foamed polyolefin is extruded and is foamed with a blowing agent that can be halogen-free hydrocarbon or CO.sub.2. To reduce the content of blowing agent, the board is needle-punched within three hours after extrusion to a perforation depth in the range of 60 to 97% of the board thickness. Such a board has good thermal stability.
    Type: Grant
    Filed: July 12, 1996
    Date of Patent: July 7, 1998
    Assignee: Scriptoria N.V.
    Inventors: Martin Fiddelaers, Leon Swennen