Oriented nylon and laminates thereof

• US 4,095,012 A
• Filed: 08/02/1976
• Issued: 06/13/1978
• Est. Priority Date: 12/23/1974
• Status: Expired due to Term

• Current Assignee: W R Grace & Company - CONN (Standard Industries Holdings, Inc.)
• Original Assignee: WR Grace & Company
• Inventors: Schirmer, Henry G.
• Primary Examiner(s): Ansher, Harold
• Application Number:
  US05/710,511
• Time in Patent Office: 680 Days
• Field of Search: 264/176 R, 264/237, 264/291, 428/474, 428/910, 428/516, 428/523, 260/857 TW
• US Class Current: 428/476.1
• CPC Class Codes: B32B 2250/40 Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
• CPC Class Codes: B32B 2307/514 Oriented
• CPC Class Codes: B32B 2307/518 bi-axially
• CPC Class Codes: B32B 2307/736 Shrinkable
• CPC Class Codes: B32B 2377/00 Polyamides
• CPC Class Codes: B32B 2553/00 Packaging equipment or accessories not otherwise provided for
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 37/085 Quenching
• CPC Class Codes: B32B 37/153 at least one layer is extruded and immediately laminated while in semi-molten state
• CPC Class Codes: Y10S 428/91 Product with molecular orientation
• CPC Class Codes: Y10T 428/31746 Polymer of monoethylenically unsaturated hydrocarbon
• CPC Class Codes: Y10T 428/31913 Monoolefin polymer
• CPC Class Codes: Y10T 428/31938 Polymer of monoethylenically unsaturated hydrocarbon

Abstract

A process for producing oriented films and laminates of nylon 66 and of blends of nylon 66 with nylon 6. In the process, moisture is excluded from the nylon preferably by coextruding a nylon layer between layers of polymeric material to form a laminate; and, after quenching the laminate, orientation may be performed after a relatively long time lapse.

Claims

1. A laminated film article comprising:

(a) a moisture-free layer comprising a blend of 20 to 80% by weight of nylon 6 and 80 to 20% by weight of nylon 66; and

,

(b) polymeric layers laminated to each side of said blended nylon layer, said polymeric layers comprising polymers selected from the group consisting of olefin polymers and copolymers.

2. The laminated film article of claim 1 wherein all layers are oriented to the same degree.

3. The laminated film article of claim 2 wherein all layers are biaxially oriented to the same degree.

4. A film comprising:

(a) a blend of 20 to 80% by weight of nylon 6 with 80 to 20% by weight of nylon 66; and

,

(b) said film being oriented in at least one direction.

5. The film of claim 4 wherein said film is biaxially oriented.