Title: Coextruded heat sealable laminar thermoplastic films

Abstract: Laminar thermoplastic films are provided which exhibit improved heat seal strengths as well as heat seal temperature ranges. The laminates comprise a predominantly propylene-based polymer substrate or core, the propylene core layer being coated with continuous skins, the skins being fabricated from ethylene based resin with a density of less than 0.939.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Breidt, Jr., Peter (Webster, NY, US)
Higgins, Thomas W. (Penfield, NY, US)
Nahmias, A. Michael (Canandaigua, NY, US)
Weiner, Milton L. (Rochester, NY, US)

Application Number: 955272
Filing Date: 1978-10-26
Publication_date: 1980-04-08
Assignee: Mobil Oil Corporation (New York, NY)
Primary Class(es): 156/229 156/244.24, 156/244.26, 156/311, 156/320, 156/322
Other Classes:
US Patent Ref:

2901770	Sep, 1959	Beck	156/244.
3017302	Jan, 1962	Hultrans	156/244.
3397101	Aug, 1968	Rausing	156/244.
3481804	Dec, 1969	Snyder	156/244.
3697368	Oct, 1972	Bhuta et al.	156/244.
3707590	Dec, 1972	Wiggins et al.	156/244.
4076568	Feb, 1978	Kubat et al.	156/229.
4151318	Apr, 1979	Marshall	156/229.

Other Refs:
Primary Examiner: Ansher, Harold
Assistant Examiner:
Attorney: Huggett; Charles A., Tierney; James D.