Films and bags of nylon 6 - nylon 6,6 blends

• US 3,995,084 A
• Filed: 02/26/1975
• Issued: 11/30/1976
• Est. Priority Date: 07/09/1973
• Status: Expired due to Term

• Current Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Original Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Inventors: Bollen, Philip S., Berger, Paul W.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Robinson, Ellis P.
• Application Number:
  US05/553,195
• Time in Patent Office: 643 Days
• Field of Search: 260/857 TW, 260/45.75 C, 229/3.5 MF, 229/53, 229/3.5 R, 426/412, 426/415, 426/106, 426/410, 428/332, 428/500, 428/35, 428/474, 428/220
• US Class Current: 428/35.5
• CPC Class Codes: B65D 81/3415 specially adapted to be heated in hot water, e.g. boil pouches dissolvable packages B65D65/46; packaging articles or materials intended to be mixed or infused with a liquid B65D85/808
• CPC Class Codes: C08K 3/16 Halogen-containing compounds
• CPC Class Codes: C08L 77/00 Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: Y10T 428/1345 Single layer [continuous layer]
• CPC Class Codes: Y10T 428/26 Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
• CPC Class Codes: Y10T 428/31739 Nylon type
• CPC Class Codes: Y10T 428/31855 Of addition polymer from unsaturated monomers

Abstract

In accordance with the present invention, films of a nylon 6-nylon 6,6 blend are produced by a process which comprises blending about 50 to about 80 percent by weight nylon 6 resin and correspondingly about 50 to about 20 percent by weight nylon 6,6 resin, extruding said blend at a temperature above its melting point onto a smooth moving support to form a coherent film; maintaining said support at a surface temperature in the range of about 230° to about 300° F. and collecting the resultant film. The resultant film has a haze value, as hereinafter defined, in the range of about 5 to about 20 percent, preferably about 8 to about 14 percent. Film having the latter range of haze values is particularly suitable for the production of cooking bags.

Claims

1. A cooking bag formed from a film comprising a blend of about 50 to about 80 weight percent nylon 6 resin and correspondingly about 50 to about 20 weight percent nylon 6,6 resin and having a haze value, as determined by ASTM D-1003, of about 8 to about 14 percent and a heat stabilizer comprising cuprous iodide and cuprous bromide.

2. A film in accordance with claim 1 wherein said blend comprises about 60 to about 70 weight percent nylon 6 and correspondingly about 40 to about 30 weight percent nylon 6,6.

3. A film in accordance with claim 2 having a thickness of about 0.5 to about 2 mils.