MULTILAYER PLASTIC ARTICLES

• US 3,801,429 A
• Filed: 10/04/1971
• Issued: 04/02/1974
• Est. Priority Date: 06/06/1969
• Status: Expired due to Term

• Current Assignee: Douglas S. Chisholm, Kenneth J. Cleereman, Turner Alfrey Jr, Walter J. Schrenk
• Original Assignee: Douglas S. Chisholm, Kenneth J. Cleereman, Turner Alfrey Jr, Walter J. Schrenk
• Inventors: Schrenk, Walter J., Chisholm, Douglas S., Cleereman, Kenneth J., Alfrey, Turner Jr.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Dixon, Jr., William R.
• Application Number:
  US05/192,725
• Time in Patent Office: 911 Days
• Field of Search: 161/169,170,175,176,178,181,252 264/174
• US Class Current: 428/392
• CPC Class Codes: B29C 48/05 Filamentary, e.g. strands
• CPC Class Codes: B29C 48/06 Rod-shaped
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/09 Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
• CPC Class Codes: B29C 48/10 flexible, e.g. blown foils
• CPC Class Codes: B29C 48/175 comprising a multi-coloured single component, e.g. striated, marbled or wood-like patterned
• CPC Class Codes: B29C 48/185 comprising six or more components, i.e. each component being counted once for each time it is present, e.g. in a layer
• CPC Class Codes: B29C 48/19 the layers being joined at their edges
• CPC Class Codes: B29C 48/21 the layers being joined at their surfaces
• CPC Class Codes: B29C 48/22 with means connecting the layers, e.g. tie layers or undercuts
• CPC Class Codes: B29C 48/307 specially adapted for bringing together components, e.g. melts within the die
• CPC Class Codes: B29C 48/335 Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
• CPC Class Codes: Y10T 428/2964 Artificial fiber or filament
• CPC Class Codes: Y10T 428/2978 Surface characteristic
• CPC Class Codes: Y10T 428/298 Physical dimension
• CPC Class Codes: Y10T 428/31928 Ester, halide or nitrile of addition polymer

Abstract

Multiple layer films are made by arranging a minimum of two streams into one stream having a plurality of generally parallel layers. By mechanically manipulating the layered stream an increased number of layers are obtained and the manipulating stream is shaped into a desired configuration having a plurality of layers generally adjacent to a major surface thereof. Under certain conditions, irridescent products are obtained without the use of pigment.

Claims